CA2177847C - Printable release compositions for adhesive articles - Google Patents
Printable release compositions for adhesive articles Download PDFInfo
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- CA2177847C CA2177847C CA002177847A CA2177847A CA2177847C CA 2177847 C CA2177847 C CA 2177847C CA 002177847 A CA002177847 A CA 002177847A CA 2177847 A CA2177847 A CA 2177847A CA 2177847 C CA2177847 C CA 2177847C
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- CA
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- Prior art keywords
- release
- substrate
- parts
- composition
- article
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
- B41M5/42—Intermediate, backcoat, or covering layers
- B41M5/44—Intermediate, backcoat, or covering layers characterised by the macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
- C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D123/04—Homopolymers or copolymers of ethene
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
- C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D123/04—Homopolymers or copolymers of ethene
- C09D123/06—Polyethene
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/40—Adhesives in the form of films or foils characterised by release liners
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/40—Adhesives in the form of films or foils characterised by release liners
- C09J7/401—Adhesives in the form of films or foils characterised by release liners characterised by the release coating composition
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C08L23/0892—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms containing monomers with other atoms than carbon, hydrogen or oxygen atoms
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2400/00—Presence of inorganic and organic materials
- C09J2400/20—Presence of organic materials
- C09J2400/28—Presence of paper
- C09J2400/283—Presence of paper in the substrate
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2421/00—Presence of unspecified rubber
- C09J2421/003—Presence of unspecified rubber in the primer coating
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2423/00—Presence of polyolefin
- C09J2423/005—Presence of polyolefin in the release coating
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2423/00—Presence of polyolefin
- C09J2423/04—Presence of homo or copolymers of ethene
- C09J2423/045—Presence of homo or copolymers of ethene in the release coating
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2433/00—Presence of (meth)acrylic polymer
- C09J2433/005—Presence of (meth)acrylic polymer in the release coating
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2483/00—Presence of polysiloxane
- C09J2483/005—Presence of polysiloxane in the release coating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/14—Layer or component removable to expose adhesive
- Y10T428/1424—Halogen containing compound
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/14—Layer or component removable to expose adhesive
- Y10T428/1462—Polymer derived from material having at least one acrylic or alkacrylic group or the nitrile or amide derivative thereof [e.g., acrylamide, acrylate ester, etc.]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/14—Layer or component removable to expose adhesive
- Y10T428/1476—Release layer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
- Y10T428/24843—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] with heat sealable or heat releasable adhesive layer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
- Y10T428/24851—Intermediate layer is discontinuous or differential
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2839—Web or sheet containing structurally defined element or component and having an adhesive outermost layer with release or antistick coating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2848—Three or more layers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2852—Adhesive compositions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31855—Of addition polymer from unsaturated monomers
- Y10T428/3188—Next to cellulosic
- Y10T428/31884—Regenerated or modified cellulose
- Y10T428/31891—Where addition polymer is an ester or halide
Abstract
The present invention is directed to a printable release composition used for pressure sensitive labels and the like. The invention is also directed to an article, such as a label, that comprises a substrate such as paper, optionally a thermal transfer primer coating coated onto the substrate and a release layer coated onto the transfer primer coating or onto the substrate. The printable release composition of the present invention may be used with labels having permanent, repositionable or removable adhesives. The particular composition of the release layer depends on the type of adhesive that is appropriate for the desired end use. The compositions for use as a release layer are based on polyethylene and silicon or vinylchlorid copolymer and polyethylene or a surfactant and acrylic copolymer.
Description
WO 95/21224 217 7 8 4 7 pCT/US95/00539 Printable release compositions for adhesive articles Background of the Invention Field of the Invention ' The present invention relates to-printable release compositions for pressure sensitive adhesive articles, such ' as labels, and to articles containing such release compositions.
Description of the Prior Art Many types of adhesive articles are known, such as labels, tapes, and note pads. Labels, in particular, are used for business forms, files, advertising, and the like.
Labels come in a variety of shapes and sizes, such as window labels, machine labels, integrated labels and the like.
Integrated labels~are physically integrated, during manufacture, with business forms, mailings and the like.
The type of adhesive best suited for use with a particular article depends on the article's ultimate use.
The adhesive may be repositionable, permanent or removable.
For instance, it may be desirable for some applications to permanently affix an article to an object, for example, a label applied to a file folder. Such applications require a permanent adhesive. A repositionable adhesive, on the other hand, can be applied to an object, removed, and reapplied.
Pads.of notes, for example, NoteStix nr PostIt notes, are examples of articles using repositionable adhesives.
CleanTac is an example of a Iabel having a repositionable adhesive. Finally, removable adhesives are appropriate when the article is to be removed after use, but is generally not reusable. Removable adhesives may, however, also include adhesives which become permanent over time.
Regardless of their use, adhesive articles must be stored and readily available for use. Such articles may utilize a separate disposable liner in juxtaposed face-to-face contact with the adhesive substrate with a release material coated on the side of the liner in contact with the adhesive side of the adhesive substrate. Just prior to use, SUBSTITUTE SWEET (RULE 26)
Description of the Prior Art Many types of adhesive articles are known, such as labels, tapes, and note pads. Labels, in particular, are used for business forms, files, advertising, and the like.
Labels come in a variety of shapes and sizes, such as window labels, machine labels, integrated labels and the like.
Integrated labels~are physically integrated, during manufacture, with business forms, mailings and the like.
The type of adhesive best suited for use with a particular article depends on the article's ultimate use.
The adhesive may be repositionable, permanent or removable.
For instance, it may be desirable for some applications to permanently affix an article to an object, for example, a label applied to a file folder. Such applications require a permanent adhesive. A repositionable adhesive, on the other hand, can be applied to an object, removed, and reapplied.
Pads.of notes, for example, NoteStix nr PostIt notes, are examples of articles using repositionable adhesives.
CleanTac is an example of a Iabel having a repositionable adhesive. Finally, removable adhesives are appropriate when the article is to be removed after use, but is generally not reusable. Removable adhesives may, however, also include adhesives which become permanent over time.
Regardless of their use, adhesive articles must be stored and readily available for use. Such articles may utilize a separate disposable liner in juxtaposed face-to-face contact with the adhesive substrate with a release material coated on the side of the liner in contact with the adhesive side of the adhesive substrate. Just prior to use, SUBSTITUTE SWEET (RULE 26)
2 the liner is peeled away from the adhesive. Such an adhesive article is often referred to as a "linered" label.
Alternatively, the adhesive article may be a substrate coated on one side with a release material and coated on the opposite side with an adhesive material. Such a linerless label can be stored in pads or rolls.
The release coating facilitates either the removal of the adhesive-coated substrate from the liner or the pad or the unwinding the linerless label from the roll. The release coating needs to have sufficient adhesion to keep, for example, the linered label on its backing, or the linerless label on a pad or in a roll, but must have sufficient release properties to allow the label to be removed from the backing or pad or to be unwound from the roll, while maintaining its adhesive property.
For some time there have been problems in producing a release coating that possesses the above properties and that, additionally, contains printed matter. One problem relates to retaining the tenacity of the printed matter on the substrate so that the printed matter is not pulled off by the adhesive or wiped off by contact occasioned by someone rubbing against or applying the label. Another -problem is "fill-in" of letters such as "o", '°a", "e", etc.
Fill-in occurs when the porosity of the substrate is not sufficient to absorb the ink and the ink has a tendency to feather out. Wipe-off and related problems may occur if the porosity of the substrate is too low and the ink does not dry sufficiently.
As an example of the above-mentioned problems, a release coating may be used for the printing of Postnet barcodes and FIM codes for automated mail processing.
Postnet (Numerical Encoding Technique) is used to encode the ZIP code or ZIPf4 code on an envelope and is located in the lower right portion of a mail piece. FIMs (Facing Identification Marks) are used to identify Business Reply Mail and are a series of vertical bars printed in the upper middle portion-of the mail piece just to the left of the SUBSnTUT~ SHEET (RULE 26~
Alternatively, the adhesive article may be a substrate coated on one side with a release material and coated on the opposite side with an adhesive material. Such a linerless label can be stored in pads or rolls.
The release coating facilitates either the removal of the adhesive-coated substrate from the liner or the pad or the unwinding the linerless label from the roll. The release coating needs to have sufficient adhesion to keep, for example, the linered label on its backing, or the linerless label on a pad or in a roll, but must have sufficient release properties to allow the label to be removed from the backing or pad or to be unwound from the roll, while maintaining its adhesive property.
For some time there have been problems in producing a release coating that possesses the above properties and that, additionally, contains printed matter. One problem relates to retaining the tenacity of the printed matter on the substrate so that the printed matter is not pulled off by the adhesive or wiped off by contact occasioned by someone rubbing against or applying the label. Another -problem is "fill-in" of letters such as "o", '°a", "e", etc.
Fill-in occurs when the porosity of the substrate is not sufficient to absorb the ink and the ink has a tendency to feather out. Wipe-off and related problems may occur if the porosity of the substrate is too low and the ink does not dry sufficiently.
As an example of the above-mentioned problems, a release coating may be used for the printing of Postnet barcodes and FIM codes for automated mail processing.
Postnet (Numerical Encoding Technique) is used to encode the ZIP code or ZIPf4 code on an envelope and is located in the lower right portion of a mail piece. FIMs (Facing Identification Marks) are used to identify Business Reply Mail and are a series of vertical bars printed in the upper middle portion-of the mail piece just to the left of the SUBSnTUT~ SHEET (RULE 26~
3 postage indicia. FIMs greatly facilitate the automated processing of the mail; thus the quality and placement of the barcodes is very critical to the success of automated processing techniques. For instance, in a linerless label application, the barcode or barcodes are printed on the release surface of a substrate. If feathering or wipe off of the printed indicia occurs, then the information contained in the respective barcodes cannot be scanned.
This may result in the loss of the cheaper bulk~mailing rate. Standard postage for each piece must then be paid, increasing the cost to the customer, and the mail must be mechanically sorted, causing delay.
In the case of thermal transfer priating, not only is a high surface energy preferred, but the surface must be very smooth. Most thermal transfer substrates contain clay coatings with relatively high surface energy and bending properties to enhance ink transfer and anchorage. A release coating imparts a lower surface energy to the face of the label for better release characteristics; however, the porosity of the label is reduced, making printing much mote difficult. Thus higher surface energy provides higher print quality, whereas lower surface energy provides for better release characteristics. Thus, there is a need for a printable release'coating having both a good quality print and good~release characteristics.
Sumtaarv of the Invention The present invention relates to printable release compositions for use with pressure sensitive adhesive articles, particularly labels. The release compositions provide appropriate release properties for the different adhesives: repositionable, permanent and removable.
The present invention is directed to a composition for use as a release layer for a permanent adhesive comprising a mixture of s (a) about 50 to about 95 parts by weight polyethylene;
This may result in the loss of the cheaper bulk~mailing rate. Standard postage for each piece must then be paid, increasing the cost to the customer, and the mail must be mechanically sorted, causing delay.
In the case of thermal transfer priating, not only is a high surface energy preferred, but the surface must be very smooth. Most thermal transfer substrates contain clay coatings with relatively high surface energy and bending properties to enhance ink transfer and anchorage. A release coating imparts a lower surface energy to the face of the label for better release characteristics; however, the porosity of the label is reduced, making printing much mote difficult. Thus higher surface energy provides higher print quality, whereas lower surface energy provides for better release characteristics. Thus, there is a need for a printable release'coating having both a good quality print and good~release characteristics.
Sumtaarv of the Invention The present invention relates to printable release compositions for use with pressure sensitive adhesive articles, particularly labels. The release compositions provide appropriate release properties for the different adhesives: repositionable, permanent and removable.
The present invention is directed to a composition for use as a release layer for a permanent adhesive comprising a mixture of s (a) about 50 to about 95 parts by weight polyethylene;
4 (b) about 5 to about 20 parts by weight silicone emulsion; and (c) a up to about 20 parts by weight ethylene vinyl chloride copolymer.
The present invention is also directed to a composition for use as a release layer for a repositionable adhesive comprising a mixture of:
(a) a major amount of ethylene vinyl chloride copolymer; and (b) a minor amount of a polyethylene emulsion.
In another embodiment, the present invention is directed to a composition for use as a release layer for a repositionable adhesive comprising:
(a) about 10 to about 80 parts by weight of a surfactant;
and (b) about 20 to about 90 parts by weight of an acrylic polymer.
In a further embodiment, the present invention is directed to an article comprising a substrate, a thermal transfer primer coating on the substrate, and a release layer on the thermal transfer primer coating wherein the thermal transfer primer coating comprises:
(a) about 20 to about 50 parts by weight of a latex;
and (b) about 50 to about 80 parts by weight pigment.
Additional advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The advantages of the invention may be realized and obtained by means of the elements and combinations particularly pointed out in the claims.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention as claimed.
Detailed Description of the Preferred Embodiments The present invention is directed to an ink jet, video jet, and the likes printable release composition for use with pressure sensitive adhesives, such as labels and the like. The invention is also directed to an article, such as a label, that comprises a substrate such as paper, optionally a thermal transfer primer coating coated onto the substrate, and a release layer coated onto the thermal transfer primer coating or onto the substrate. The label may be either linerless or linered. The printable release composition of the present invention may be used with labels having permanent, repositionable or removable adhesives.
The particular composition of the release layer depends on the type of adhesive that is appropriate for the desired end use.
In accordance with the present invention, as embodied and broadly described herein, a composition is provided for use as a release for ~ permanent adhesive. This composition comprises a mixture of:
(a) about 50 to about 95 parts by weight polyethylene;
and (b) about 5 to about 20 parts by weight silicon emulsion.
Preferably, the polyethylene has a melting point of 100'C or~higher. The polyethylene is preferably an emulsion and may be obtained from commercial sources such as MICHEM*
460, from Michelman, Inc., which is a polyethylene emulsion, having a density of 8.3, a pH of 10.1, a melting point of 110°C, and a hardness of 1.5. Other emulsions that can be used include Michem 32535, 74040, 46025 and 6872 5, also from Michelman, Inc. Preferably, the composition contains about 80 to about 95 parts by weight polyethylene.
The silicon emul$ion preferably contains an organopoly-siloxane, such as methylhydrogen polysiloxane, for example, SYLOFF 1171* available from Dow Corning Corporation, or dimethyl polysiloxane, for example, "PC-107n available from *Trade-mark Rhone-Poulenc. Preferably, the composition contains about 5 parts by weight silicon emulsion.
The composition may further comprise up to about 20 parts by weight ethylene vinyl chloride copolymer. The ethylene vinyl chloride copolymer blend may be, for example, VALCOAT*531 available from Air Products & Chemicals, Inc.
The composition may also contain other additives which do not adversely affect the desired properties of the release, such as pigments, thickeners, binders and amphipathic materials.
Examples of pigments that can be included in the thermal transfer primer coating composition include, for example, BURGESS No. 28, available from Burgess Pigment, and SUPERMITE*,'available from ECC International. An EVA
thickener also may be used in the thermal transfer barrier coating composition of the invention, such as AIRFLEX*1650, from Air Products. Examples of suitable binders that can be included in the thermal transfer barrier coating composition include, for example, AIRFLEX*100 HS from Air Products Corp., CARGILL*.f6431 from Cargill, KRISTALEX*3070 from Hercules, REICHHOLD*!68-O10 from Reichhold Chemical, and UCAR*
LATEX 376 from Union Carbide. Amphipathic materials that can be included in the release composition include ALIPAL*
CD-128 from GAF Corp., PLURONIC*~,-101 from BASF Corp., surfactant M-310 from Texaco, TEXAPHOR 963 from Henkel Corp., and TRITON* GRSM from Union Carbide and amphipathic surfactant AEROSOL*'22, C26H43NOlONa4S, from American Cyanamid Co. The amphipathic materials increase the release and printing properties.
In accordance with the invention, as embodied and broadly described herein, a composition is provided for use as a release for a repositionable adhesive which comprises a mixture of:
(a) a major amount of ethylene vinyl chloride copolymer; and (b) a minor amount of a polyethylene emulsion.
*Trade-mark Polyethylene emulsions that can be used in the invention include, but are not limited to, MICHBM 460, MICHEM 32535 MICHEM 68725, MICHEM 74040 and MICHEM 46025.
Preferably, the composition contains about 60 to about 90 parts by weight ethylene vinyl chloride copolymer, and most preferably about 75 parts by weight ethylene vinyl chloride copolymer.
Ethylene vinyl chloride copolymers that can be used in the invention include, but are not limited to, VALCOAT 531.
Preferably, the composition contains about 10 to about 40 parts by weight polyethylene emulsion, and most preferably about 25 parts by weight polyethylene emulsion.
The composition can also contain other additives which do not adversely affect the desired properties of the release, such as the pigments, thickeners, binders and amphipathic materials described above.
In accordance with the invention, as embodied and broadly described herein, a release composition is provided which comprises:
(a) about 10 to about 80 parts by wet weight of a surfactant; and (b) about 20 to about 90 parts by wet weight of an acrylic copolymer.
The surfactant may be selected from, for example, sulfosuccinamate compounds, preferably tetrasodium N-(1,2-dicarboxyethyl)-N-octadecyl sulfosuccinamate. Other surfactants include SURFACT*M-310 (Texaco), ALIPAL CD-128 (GAF Corp) and TRITON GRSM (Union Carbide). A particular sulfosuccinamate that may be used in the invention is AEROSOL 22, available from American Cyanamid Co. The release composition preferably contains about 20 to about 60 parts by weight of a surfactant. The composition may also contain calcium stearate, in a MICHEM 170 emulsion.
The acrylic copolymer may be selected from, for example, commercial formulations such as ACRYSOL ASE-60 from Rohm and Haas Co. Another source is ALCOGUM* L-31, from Alco *Trade-mark WO 9512122) 2 1 7 7 8 4 ~ pCT/US95/00539 Chemicals. The-release composition preferably contains about 40 to about.80 parts by weight of an acrylic copolymer.
The release composition described above comprising a surfactant and an acrylic polymer is particularly suited for use as an ink-jet printable release. The release composition works well with the ink-jet to accept ink due to proper porosity and release. The ink is partially absorbed into the substrate so that it dries quickly and does not feather. Water based ink-jet, such as VideoJet, produces better print quality and drying times with formulas consisting of at least 50 parts of acrylic polymer. Better print quality and drying time for oil based ink-jet, such as Trident, require at least 60 parts of the acrylic polymer.
The release suited for use as an ink-jet printable release may also contain about 10 to about 20 parts by weight calcium stearate emulsion such as MICHEM.170 by Michelman, Inc. for enhanced edge definition.
The ink-jet printable release may be coated on substrates, preferably 20# or 24# standard paper, such as 24# Union Camp Alkaline. The ink-jet release compositions are preferably coated at 0.37 - 1.8 gsm using a meyer rod, dahlgren, reverse roll, direct gravure, reverse gravure, direct and offset flexo. The release layer is printable with flexo, litho, gravure and dot matrix and laser.
Any of the release compositions described above may be coated on a substrate such as paper to obtain an article, preferably a label. The article may be prepared by coating the release composition onto at least a portion of one side of the substrate. A layer of a thermal transfer primer coating may be juxtaposed between the substrate and the release layer.
The article may contain a permanent or repositionable adhesive depending on its intended use. The release layer "
composition should be selected accordingly. The adhesive is applied either on the side of the substrate opposite the release layer, e.g., a linerless label, or on at least a SUBSTIMf SHEET (RULE 26~
portion of one side of a different substrate, wherein the adhesive layer is in juxtaposed contact with the release layer, e.g., a linered label.
Improved image quality may be obtained on plain paper (e. g., Finch Fine 24# stock) if the paper has been pre-coated with a thermal transfer primer coating. A thermal transfer primer coating provides for a smoother-contact surface between the paper and the printhead. It also acts as an insulating layer or barrier by keeping the heat generated during the printing operation from penetrating into the paper. Printing ribbons have a wax coating which melts to release the ink. By keeping the heat on the surface, the ink is forced to print on the release surface, improving the print quality and producing a superior image.
The thermal transfer primer coating also functions to bind the release coating to the substrate, enhancing the scratch and scuff resistance of the release.
Instead of a thermal transfer primer coating, a barrier coating may be provided between the substrate and the release, which may be, for example, vinyl acetate/ethylene copolymers such as AIRFhEX 1650 by Air Products.
In accordance with the invention, as embodied and broadly described herein, an article is provided comprising a substrate, a thermal transfer primer coating coated on the substrate, and a release layer coated on the thermal transfer primer coating. The thermal transfer primer coating comprises:
(a) about 20 to about 50 parts by weight of a latex;
and (b) about 50 to about 80 parts by weight pigment.
The pigment may be selected from, for example, ROPAQUE*
84, by Rohm and Haas Co. The pigment preferably has a small particle size to obtain a smooth coating. Preferably, the thermal transfer primer coating includes about 80 parts by weight of pigment.
The latex may be, for example, commercial formulations such as LATEX* 620. by Dow Chemical. Preferably,-the thermal *Trade-mark transfer primer coating includes about 20 parts by weight of a latex.
The substrates usable in the invention are preferably #24 or #20 paper. Commercial paper may be used such as 20#
Finch Fine, Consolidated, and other types of thermal transfer sheets commercially available. Other substrates include films, TYVEK, polyester, and the like. The coating weight of the thermal transfer primer coating is preferably 2.5 to 4.0 gsm, and more preferably 2.8 gsm to 3.8 gsm. The coating weight of the release composition is preferably 5.0 gsm to 8.0 gsm, and more preferably 5.6 gsm to 7.5 gem.
The substratE is precoated with the thermal transfer primer coating, if desired, then a release composition is prepared and coated on the thermal transfer primer coating, or on the substrate if no thermal transfer primer coating is present, using a coater, such as a Meyer Rod coater. The coater can use a dahlgren, flexo, gravure blade or roll to roll. Preferably, a No. 28 meyer rod is used. A meyer rod is a coating rod or bar having different size diameters that can be selected for applying different amounts of coatings.
The release composition described above comprising a surfactant and an acrylic polymer is particularly suited for use as an ink-jet printable release.
Water based ink-jet, such as videoJet, produces better print quality and dry times with formulas consisting of at least 50 parts of acrylic polymer. Better print quality and dry time for oil based ink-jet, such as Trident, require at least 60 parts of the acrylic polymer.
The ink-jet printable release may also contain 10 to 20 parts calcium stearate emulsion such as MICHEM 170 by Michelman, Inc. for enhanced edge definition.
The ink-jet printable release is coated on substrates, preferably 20# or 24# standard paper, such as 24# Union Camp Alkaline.
The ink-jet release compositions are preferably coated at 0.37 - 1.8 gsm using a meyer rod, dahlgren, reverse roll, direct gravure, reverse gravure, direct and offset flexo.
SUBSTCTUTf SHEET (RULE 26~
217 7 8 4 7 P~'~595100539 The release layer is printable with flexo, litho, gravure and dot matrix.
The following examples are illustrative, and are not intended to limit the scope of-the present invention.
Examples 1 and 2 are directed to release compositions for use with repositionable adhesives.
A substrate was prepared by precoating with a thermal transfer primer coating.
Substrate: 24# Finch Fine Paper Thermal transfer primer coating : 80 parts ROPAQUE 84 20 parts LATEX 620 Coat weight of 2.82 gsm A release composition was prepared and coated on the thermal transfer primer coating of the substrate using a Meyer Rod coater with a No. 28 meyer rod.
Release: 50 parts AEROSOL 22 Surfactant 50 parts ACRYSOL ASE 60 Coat Weight of 5.64 gsm Two week accelerated aging (AA) delamination values were in the 1.0 - 2.0 oz/in range. AA Was performed under heated conditions of 120°F.
Substrate: 24~ Consolidated Thermal Transfer Paper A release composition was prepared and coated on the substrate.
Release: 30 parts AEROSOL 22 70 parts ACRYSOL ASE-60 Coat weight 6.76 gsm Two week AA delamination values were in the 1.0 - 2.0 oz/in range.
In examples 3-5, trials were conducted using the Meyer Rod coater to produce a permanent printable release for use with a permanent adhesive.
SUBSTITUTE SHEET (RULE 267 A substrate was prepared by precoating with a thermal transfer primer coating.
Substrate: 24~ Finch Fine paper Thermal transfer primer coating: 80 parts ROPAQUE 84 20 parts LATEX 620 coat weight 3.76 gsm A release composition was prepared and coated on the thermal transfer primer coating.
Release: 75 parts - Polyethylene, MICHEM 460 15 parts - Ethylene Vinyl Chloride, parts - Silicone Emulsion, PCL 107 coat weight 7.5 gsm A substrate was prepared by precoating with a thermal transfer primer coating.
Substrate: 24~ Finch Fine paper Thermal transfer primer coating: 80 parts ROPAQUE 84 parts LATEX 620 coat weight 2.82 -3.76 gsm A release composition was prepared and coated on the thermal transfer primer coating.
Release: 80 parts Polyethylene, (MICHEM 460) 10 parts VALCOAT 531 10 parts PCL 107 coat weight 5.65 - 7.5 gsm A substrate was prepared by precoating with a barrier coating.
Substrate: 24# Finch Fine paper Barrier: Vinyl Acetate/Ethylene Copolymer, AIRE'LEX 1650 coat weight 2.8 - 6.5 gsm A release composition was prepared and coated on the barrier coating.
SUBSTITUTE SHEET (RULE 26) WO 95121224 13 217 ~ g 4 ~ PCT~S95I00539 Release: 90 parts Polyethylene MICHEM 460 parts SYLOFF 1171 coat weight 5.6 - 7.5 gsm None of the materials alone meets all the requirements for a good printable release. However, proper blends offer acceptable print and release.
In examples 6-8, trials were conducted using dahlgren to produce an ink-jet printable release. After a 2 week accelerated aging test at 120°F, delamination values of Less than 2.7 oz/in were obtained.
A substrate was coated with a release composition.
Substrate: 24# Union Camp Alkaline Release: 50 parts AEROSOL 22 50 parts ASE-60 coat weight I.5 gsm A substrate was coated with a release composition.
Substrate: 24# Union Camp Alkaline Release: 20 parts AEROSOL 22 80 parts ASE-60 coat weight 1.3 gsm A substrate was coated with a release composition.
Substrate 24# Union Camp Alkaline Release: l8~parts AEROSOL 22 72 parts ASE-60 10 parts MICHEM 170 coat weight 1.3 gsm Examples 6-8 exhibited good drying time, good dot uniformity and contrast and a good print contrast ratio greater than 75.
It will be apparent to those skilled in the art that various modifications and variations can be made in the compositions and methods of the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention cover the SU8STLTU1'E SHEET (RULE 26'~
WO 95121224 ~ A ~ PCT/U595/00539 modifications and'variations of this invention provided they come within the scope of the appended claims and their equivalents.
SUBSTITUTf SHEET (RULE 25~
The present invention is also directed to a composition for use as a release layer for a repositionable adhesive comprising a mixture of:
(a) a major amount of ethylene vinyl chloride copolymer; and (b) a minor amount of a polyethylene emulsion.
In another embodiment, the present invention is directed to a composition for use as a release layer for a repositionable adhesive comprising:
(a) about 10 to about 80 parts by weight of a surfactant;
and (b) about 20 to about 90 parts by weight of an acrylic polymer.
In a further embodiment, the present invention is directed to an article comprising a substrate, a thermal transfer primer coating on the substrate, and a release layer on the thermal transfer primer coating wherein the thermal transfer primer coating comprises:
(a) about 20 to about 50 parts by weight of a latex;
and (b) about 50 to about 80 parts by weight pigment.
Additional advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The advantages of the invention may be realized and obtained by means of the elements and combinations particularly pointed out in the claims.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention as claimed.
Detailed Description of the Preferred Embodiments The present invention is directed to an ink jet, video jet, and the likes printable release composition for use with pressure sensitive adhesives, such as labels and the like. The invention is also directed to an article, such as a label, that comprises a substrate such as paper, optionally a thermal transfer primer coating coated onto the substrate, and a release layer coated onto the thermal transfer primer coating or onto the substrate. The label may be either linerless or linered. The printable release composition of the present invention may be used with labels having permanent, repositionable or removable adhesives.
The particular composition of the release layer depends on the type of adhesive that is appropriate for the desired end use.
In accordance with the present invention, as embodied and broadly described herein, a composition is provided for use as a release for ~ permanent adhesive. This composition comprises a mixture of:
(a) about 50 to about 95 parts by weight polyethylene;
and (b) about 5 to about 20 parts by weight silicon emulsion.
Preferably, the polyethylene has a melting point of 100'C or~higher. The polyethylene is preferably an emulsion and may be obtained from commercial sources such as MICHEM*
460, from Michelman, Inc., which is a polyethylene emulsion, having a density of 8.3, a pH of 10.1, a melting point of 110°C, and a hardness of 1.5. Other emulsions that can be used include Michem 32535, 74040, 46025 and 6872 5, also from Michelman, Inc. Preferably, the composition contains about 80 to about 95 parts by weight polyethylene.
The silicon emul$ion preferably contains an organopoly-siloxane, such as methylhydrogen polysiloxane, for example, SYLOFF 1171* available from Dow Corning Corporation, or dimethyl polysiloxane, for example, "PC-107n available from *Trade-mark Rhone-Poulenc. Preferably, the composition contains about 5 parts by weight silicon emulsion.
The composition may further comprise up to about 20 parts by weight ethylene vinyl chloride copolymer. The ethylene vinyl chloride copolymer blend may be, for example, VALCOAT*531 available from Air Products & Chemicals, Inc.
The composition may also contain other additives which do not adversely affect the desired properties of the release, such as pigments, thickeners, binders and amphipathic materials.
Examples of pigments that can be included in the thermal transfer primer coating composition include, for example, BURGESS No. 28, available from Burgess Pigment, and SUPERMITE*,'available from ECC International. An EVA
thickener also may be used in the thermal transfer barrier coating composition of the invention, such as AIRFLEX*1650, from Air Products. Examples of suitable binders that can be included in the thermal transfer barrier coating composition include, for example, AIRFLEX*100 HS from Air Products Corp., CARGILL*.f6431 from Cargill, KRISTALEX*3070 from Hercules, REICHHOLD*!68-O10 from Reichhold Chemical, and UCAR*
LATEX 376 from Union Carbide. Amphipathic materials that can be included in the release composition include ALIPAL*
CD-128 from GAF Corp., PLURONIC*~,-101 from BASF Corp., surfactant M-310 from Texaco, TEXAPHOR 963 from Henkel Corp., and TRITON* GRSM from Union Carbide and amphipathic surfactant AEROSOL*'22, C26H43NOlONa4S, from American Cyanamid Co. The amphipathic materials increase the release and printing properties.
In accordance with the invention, as embodied and broadly described herein, a composition is provided for use as a release for a repositionable adhesive which comprises a mixture of:
(a) a major amount of ethylene vinyl chloride copolymer; and (b) a minor amount of a polyethylene emulsion.
*Trade-mark Polyethylene emulsions that can be used in the invention include, but are not limited to, MICHBM 460, MICHEM 32535 MICHEM 68725, MICHEM 74040 and MICHEM 46025.
Preferably, the composition contains about 60 to about 90 parts by weight ethylene vinyl chloride copolymer, and most preferably about 75 parts by weight ethylene vinyl chloride copolymer.
Ethylene vinyl chloride copolymers that can be used in the invention include, but are not limited to, VALCOAT 531.
Preferably, the composition contains about 10 to about 40 parts by weight polyethylene emulsion, and most preferably about 25 parts by weight polyethylene emulsion.
The composition can also contain other additives which do not adversely affect the desired properties of the release, such as the pigments, thickeners, binders and amphipathic materials described above.
In accordance with the invention, as embodied and broadly described herein, a release composition is provided which comprises:
(a) about 10 to about 80 parts by wet weight of a surfactant; and (b) about 20 to about 90 parts by wet weight of an acrylic copolymer.
The surfactant may be selected from, for example, sulfosuccinamate compounds, preferably tetrasodium N-(1,2-dicarboxyethyl)-N-octadecyl sulfosuccinamate. Other surfactants include SURFACT*M-310 (Texaco), ALIPAL CD-128 (GAF Corp) and TRITON GRSM (Union Carbide). A particular sulfosuccinamate that may be used in the invention is AEROSOL 22, available from American Cyanamid Co. The release composition preferably contains about 20 to about 60 parts by weight of a surfactant. The composition may also contain calcium stearate, in a MICHEM 170 emulsion.
The acrylic copolymer may be selected from, for example, commercial formulations such as ACRYSOL ASE-60 from Rohm and Haas Co. Another source is ALCOGUM* L-31, from Alco *Trade-mark WO 9512122) 2 1 7 7 8 4 ~ pCT/US95/00539 Chemicals. The-release composition preferably contains about 40 to about.80 parts by weight of an acrylic copolymer.
The release composition described above comprising a surfactant and an acrylic polymer is particularly suited for use as an ink-jet printable release. The release composition works well with the ink-jet to accept ink due to proper porosity and release. The ink is partially absorbed into the substrate so that it dries quickly and does not feather. Water based ink-jet, such as VideoJet, produces better print quality and drying times with formulas consisting of at least 50 parts of acrylic polymer. Better print quality and drying time for oil based ink-jet, such as Trident, require at least 60 parts of the acrylic polymer.
The release suited for use as an ink-jet printable release may also contain about 10 to about 20 parts by weight calcium stearate emulsion such as MICHEM.170 by Michelman, Inc. for enhanced edge definition.
The ink-jet printable release may be coated on substrates, preferably 20# or 24# standard paper, such as 24# Union Camp Alkaline. The ink-jet release compositions are preferably coated at 0.37 - 1.8 gsm using a meyer rod, dahlgren, reverse roll, direct gravure, reverse gravure, direct and offset flexo. The release layer is printable with flexo, litho, gravure and dot matrix and laser.
Any of the release compositions described above may be coated on a substrate such as paper to obtain an article, preferably a label. The article may be prepared by coating the release composition onto at least a portion of one side of the substrate. A layer of a thermal transfer primer coating may be juxtaposed between the substrate and the release layer.
The article may contain a permanent or repositionable adhesive depending on its intended use. The release layer "
composition should be selected accordingly. The adhesive is applied either on the side of the substrate opposite the release layer, e.g., a linerless label, or on at least a SUBSTIMf SHEET (RULE 26~
portion of one side of a different substrate, wherein the adhesive layer is in juxtaposed contact with the release layer, e.g., a linered label.
Improved image quality may be obtained on plain paper (e. g., Finch Fine 24# stock) if the paper has been pre-coated with a thermal transfer primer coating. A thermal transfer primer coating provides for a smoother-contact surface between the paper and the printhead. It also acts as an insulating layer or barrier by keeping the heat generated during the printing operation from penetrating into the paper. Printing ribbons have a wax coating which melts to release the ink. By keeping the heat on the surface, the ink is forced to print on the release surface, improving the print quality and producing a superior image.
The thermal transfer primer coating also functions to bind the release coating to the substrate, enhancing the scratch and scuff resistance of the release.
Instead of a thermal transfer primer coating, a barrier coating may be provided between the substrate and the release, which may be, for example, vinyl acetate/ethylene copolymers such as AIRFhEX 1650 by Air Products.
In accordance with the invention, as embodied and broadly described herein, an article is provided comprising a substrate, a thermal transfer primer coating coated on the substrate, and a release layer coated on the thermal transfer primer coating. The thermal transfer primer coating comprises:
(a) about 20 to about 50 parts by weight of a latex;
and (b) about 50 to about 80 parts by weight pigment.
The pigment may be selected from, for example, ROPAQUE*
84, by Rohm and Haas Co. The pigment preferably has a small particle size to obtain a smooth coating. Preferably, the thermal transfer primer coating includes about 80 parts by weight of pigment.
The latex may be, for example, commercial formulations such as LATEX* 620. by Dow Chemical. Preferably,-the thermal *Trade-mark transfer primer coating includes about 20 parts by weight of a latex.
The substrates usable in the invention are preferably #24 or #20 paper. Commercial paper may be used such as 20#
Finch Fine, Consolidated, and other types of thermal transfer sheets commercially available. Other substrates include films, TYVEK, polyester, and the like. The coating weight of the thermal transfer primer coating is preferably 2.5 to 4.0 gsm, and more preferably 2.8 gsm to 3.8 gsm. The coating weight of the release composition is preferably 5.0 gsm to 8.0 gsm, and more preferably 5.6 gsm to 7.5 gem.
The substratE is precoated with the thermal transfer primer coating, if desired, then a release composition is prepared and coated on the thermal transfer primer coating, or on the substrate if no thermal transfer primer coating is present, using a coater, such as a Meyer Rod coater. The coater can use a dahlgren, flexo, gravure blade or roll to roll. Preferably, a No. 28 meyer rod is used. A meyer rod is a coating rod or bar having different size diameters that can be selected for applying different amounts of coatings.
The release composition described above comprising a surfactant and an acrylic polymer is particularly suited for use as an ink-jet printable release.
Water based ink-jet, such as videoJet, produces better print quality and dry times with formulas consisting of at least 50 parts of acrylic polymer. Better print quality and dry time for oil based ink-jet, such as Trident, require at least 60 parts of the acrylic polymer.
The ink-jet printable release may also contain 10 to 20 parts calcium stearate emulsion such as MICHEM 170 by Michelman, Inc. for enhanced edge definition.
The ink-jet printable release is coated on substrates, preferably 20# or 24# standard paper, such as 24# Union Camp Alkaline.
The ink-jet release compositions are preferably coated at 0.37 - 1.8 gsm using a meyer rod, dahlgren, reverse roll, direct gravure, reverse gravure, direct and offset flexo.
SUBSTCTUTf SHEET (RULE 26~
217 7 8 4 7 P~'~595100539 The release layer is printable with flexo, litho, gravure and dot matrix.
The following examples are illustrative, and are not intended to limit the scope of-the present invention.
Examples 1 and 2 are directed to release compositions for use with repositionable adhesives.
A substrate was prepared by precoating with a thermal transfer primer coating.
Substrate: 24# Finch Fine Paper Thermal transfer primer coating : 80 parts ROPAQUE 84 20 parts LATEX 620 Coat weight of 2.82 gsm A release composition was prepared and coated on the thermal transfer primer coating of the substrate using a Meyer Rod coater with a No. 28 meyer rod.
Release: 50 parts AEROSOL 22 Surfactant 50 parts ACRYSOL ASE 60 Coat Weight of 5.64 gsm Two week accelerated aging (AA) delamination values were in the 1.0 - 2.0 oz/in range. AA Was performed under heated conditions of 120°F.
Substrate: 24~ Consolidated Thermal Transfer Paper A release composition was prepared and coated on the substrate.
Release: 30 parts AEROSOL 22 70 parts ACRYSOL ASE-60 Coat weight 6.76 gsm Two week AA delamination values were in the 1.0 - 2.0 oz/in range.
In examples 3-5, trials were conducted using the Meyer Rod coater to produce a permanent printable release for use with a permanent adhesive.
SUBSTITUTE SHEET (RULE 267 A substrate was prepared by precoating with a thermal transfer primer coating.
Substrate: 24~ Finch Fine paper Thermal transfer primer coating: 80 parts ROPAQUE 84 20 parts LATEX 620 coat weight 3.76 gsm A release composition was prepared and coated on the thermal transfer primer coating.
Release: 75 parts - Polyethylene, MICHEM 460 15 parts - Ethylene Vinyl Chloride, parts - Silicone Emulsion, PCL 107 coat weight 7.5 gsm A substrate was prepared by precoating with a thermal transfer primer coating.
Substrate: 24~ Finch Fine paper Thermal transfer primer coating: 80 parts ROPAQUE 84 parts LATEX 620 coat weight 2.82 -3.76 gsm A release composition was prepared and coated on the thermal transfer primer coating.
Release: 80 parts Polyethylene, (MICHEM 460) 10 parts VALCOAT 531 10 parts PCL 107 coat weight 5.65 - 7.5 gsm A substrate was prepared by precoating with a barrier coating.
Substrate: 24# Finch Fine paper Barrier: Vinyl Acetate/Ethylene Copolymer, AIRE'LEX 1650 coat weight 2.8 - 6.5 gsm A release composition was prepared and coated on the barrier coating.
SUBSTITUTE SHEET (RULE 26) WO 95121224 13 217 ~ g 4 ~ PCT~S95I00539 Release: 90 parts Polyethylene MICHEM 460 parts SYLOFF 1171 coat weight 5.6 - 7.5 gsm None of the materials alone meets all the requirements for a good printable release. However, proper blends offer acceptable print and release.
In examples 6-8, trials were conducted using dahlgren to produce an ink-jet printable release. After a 2 week accelerated aging test at 120°F, delamination values of Less than 2.7 oz/in were obtained.
A substrate was coated with a release composition.
Substrate: 24# Union Camp Alkaline Release: 50 parts AEROSOL 22 50 parts ASE-60 coat weight I.5 gsm A substrate was coated with a release composition.
Substrate: 24# Union Camp Alkaline Release: 20 parts AEROSOL 22 80 parts ASE-60 coat weight 1.3 gsm A substrate was coated with a release composition.
Substrate 24# Union Camp Alkaline Release: l8~parts AEROSOL 22 72 parts ASE-60 10 parts MICHEM 170 coat weight 1.3 gsm Examples 6-8 exhibited good drying time, good dot uniformity and contrast and a good print contrast ratio greater than 75.
It will be apparent to those skilled in the art that various modifications and variations can be made in the compositions and methods of the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention cover the SU8STLTU1'E SHEET (RULE 26'~
WO 95121224 ~ A ~ PCT/U595/00539 modifications and'variations of this invention provided they come within the scope of the appended claims and their equivalents.
SUBSTITUTf SHEET (RULE 25~
Claims (11)
1. A composition for use as a release for a permanent adhesive comprising a mixture of:
(a) about 50 to about 95 parts by weight polyethylene;
(b) about 5 to about 20 parts by weight silicone emulsion; and (c) up to about 20 parts by weight ethylene vinyl chloride copolymer.
(a) about 50 to about 95 parts by weight polyethylene;
(b) about 5 to about 20 parts by weight silicone emulsion; and (c) up to about 20 parts by weight ethylene vinyl chloride copolymer.
2. The composition of claim 1, wherein the mixture comprises about 80 to about 95 parts by weight polyethylene.
3. The composition of claim 1, wherein the polyethylene is a polyethylene emulsion.
4. The composition of claim l, wherein the silicone emulsion contains an organopolysiloxane.
5. The composition of claim 4, wherein the organopolysiloxane is selected from methylhydrogen polysiloxane and dimethyl polysiloxane.
6. An article comprising a substrate and a release layer, said release layer comprising the composition of claim 1 coated onto at least a portion of one side of the substrate.
7. The article of claim 6, further comprising a layer of a thermal transfer primer coating juxtaposed between the substrate and the release layer.
8. The article of claim 7, wherein the substrate is paper.
9. The article of claim 8, further comprising a permanent adhesive located on the side of the substrate opposite the release layer.
10. The article of claim 9, wherein the article is a linerless label.
11. The article of claim 8, further comprising a layer of a permanent adhesive coated on at least a portion of one side of a different substrate, wherein the adhesive layer is in juxtaposed contact with the release layer.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002461428A CA2461428C (en) | 1994-02-01 | 1995-01-20 | Printable release compositions for adhesive articles |
CA002461425A CA2461425A1 (en) | 1994-02-01 | 1995-01-20 | Printable release compositions for adhesive articles |
CA002461423A CA2461423C (en) | 1994-02-01 | 1995-01-20 | Printable release compositions for adhesive articles |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/189,632 US5478880A (en) | 1994-02-01 | 1994-02-01 | Printable release |
US08/189,632 | 1994-02-01 | ||
PCT/US1995/000539 WO1995021224A1 (en) | 1994-02-01 | 1995-01-20 | Printable release compositions for adhesive articles |
Related Child Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002461425A Division CA2461425A1 (en) | 1994-02-01 | 1995-01-20 | Printable release compositions for adhesive articles |
CA002461428A Division CA2461428C (en) | 1994-02-01 | 1995-01-20 | Printable release compositions for adhesive articles |
CA002461423A Division CA2461423C (en) | 1994-02-01 | 1995-01-20 | Printable release compositions for adhesive articles |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2177847A1 CA2177847A1 (en) | 1995-08-10 |
CA2177847C true CA2177847C (en) | 2005-05-03 |
Family
ID=22698143
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002177847A Expired - Lifetime CA2177847C (en) | 1994-02-01 | 1995-01-20 | Printable release compositions for adhesive articles |
Country Status (12)
Country | Link |
---|---|
US (5) | US5478880A (en) |
EP (2) | EP1028148B1 (en) |
JP (1) | JPH09508653A (en) |
CN (1) | CN1139948A (en) |
AT (2) | ATE220418T1 (en) |
AU (1) | AU689606B2 (en) |
CA (1) | CA2177847C (en) |
DE (2) | DE69527349T2 (en) |
DK (1) | DK0742813T3 (en) |
ES (1) | ES2179866T3 (en) |
NO (1) | NO963201D0 (en) |
WO (1) | WO1995021224A1 (en) |
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-
1994
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-
1995
- 1995-01-20 DE DE69527349T patent/DE69527349T2/en not_active Expired - Fee Related
- 1995-01-20 AT AT95908051T patent/ATE220418T1/en not_active IP Right Cessation
- 1995-01-20 DE DE69535109T patent/DE69535109T2/en not_active Expired - Fee Related
- 1995-01-20 ES ES95908051T patent/ES2179866T3/en not_active Expired - Lifetime
- 1995-01-20 EP EP00101843A patent/EP1028148B1/en not_active Expired - Lifetime
- 1995-01-20 CA CA002177847A patent/CA2177847C/en not_active Expired - Lifetime
- 1995-01-20 DK DK95908051T patent/DK0742813T3/en active
- 1995-01-20 AT AT00101843T patent/ATE332944T1/en not_active IP Right Cessation
- 1995-01-20 WO PCT/US1995/000539 patent/WO1995021224A1/en active IP Right Grant
- 1995-01-20 AU AU27909/95A patent/AU689606B2/en not_active Ceased
- 1995-01-20 EP EP95908051A patent/EP0742813B1/en not_active Expired - Lifetime
- 1995-01-20 JP JP7520621A patent/JPH09508653A/en not_active Ceased
- 1995-01-20 CN CN95191429A patent/CN1139948A/en active Pending
- 1995-06-07 US US08/488,360 patent/US5621030A/en not_active Expired - Lifetime
- 1995-06-07 US US08/488,358 patent/US5543192A/en not_active Expired - Lifetime
-
1996
- 1996-07-31 NO NO963201A patent/NO963201D0/en not_active Application Discontinuation
-
1997
- 1997-02-26 US US08/806,855 patent/US5874499A/en not_active Expired - Lifetime
-
1998
- 1998-10-26 US US09/179,246 patent/US5985982A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US5478880A (en) | 1995-12-26 |
AU689606B2 (en) | 1998-04-02 |
CN1139948A (en) | 1997-01-08 |
ATE332944T1 (en) | 2006-08-15 |
US5985982A (en) | 1999-11-16 |
JPH09508653A (en) | 1997-09-02 |
DE69527349T2 (en) | 2003-02-13 |
EP1028148A2 (en) | 2000-08-16 |
DE69535109D1 (en) | 2006-08-24 |
US5874499A (en) | 1999-02-23 |
EP0742813B1 (en) | 2002-07-10 |
NO963201L (en) | 1996-07-31 |
WO1995021224A1 (en) | 1995-08-10 |
EP0742813A1 (en) | 1996-11-20 |
EP1028148B1 (en) | 2006-07-12 |
DK0742813T3 (en) | 2002-09-09 |
DE69527349D1 (en) | 2002-08-14 |
ES2179866T3 (en) | 2003-02-01 |
CA2177847A1 (en) | 1995-08-10 |
US5621030A (en) | 1997-04-15 |
US5543192A (en) | 1996-08-06 |
DE69535109T2 (en) | 2007-02-08 |
EP1028148A3 (en) | 2002-06-26 |
AU2790995A (en) | 1995-08-21 |
ATE220418T1 (en) | 2002-07-15 |
NO963201D0 (en) | 1996-07-31 |
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EEER | Examination request | ||
MKEX | Expiry |
Effective date: 20150120 |