CA2625268A1 - Improvements in flushable body waste collection pouches, pouch-in-pouch appliances using the same, and methods pertaining thereto - Google Patents
Improvements in flushable body waste collection pouches, pouch-in-pouch appliances using the same, and methods pertaining thereto Download PDFInfo
- Publication number
- CA2625268A1 CA2625268A1 CA002625268A CA2625268A CA2625268A1 CA 2625268 A1 CA2625268 A1 CA 2625268A1 CA 002625268 A CA002625268 A CA 002625268A CA 2625268 A CA2625268 A CA 2625268A CA 2625268 A1 CA2625268 A1 CA 2625268A1
- Authority
- CA
- Canada
- Prior art keywords
- pouch
- water
- walls
- film
- cover layer
- Prior art date
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 26
- 239000002699 waste material Substances 0.000 title claims description 21
- 239000000835 fiber Substances 0.000 claims abstract description 28
- 239000000314 lubricant Substances 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000011248 coating agent Substances 0.000 claims abstract description 22
- 238000000576 coating method Methods 0.000 claims abstract description 22
- 238000001035 drying Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 14
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 150000003839 salts Chemical class 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 10
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims description 9
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims description 9
- 229920001634 Copolyester Polymers 0.000 claims description 7
- 108010010803 Gelatin Proteins 0.000 claims description 7
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims description 7
- 229920000159 gelatin Polymers 0.000 claims description 7
- 239000008273 gelatin Substances 0.000 claims description 7
- 235000019322 gelatine Nutrition 0.000 claims description 7
- 235000011852 gelatine desserts Nutrition 0.000 claims description 7
- 239000001814 pectin Substances 0.000 claims description 7
- 235000010987 pectin Nutrition 0.000 claims description 7
- 229920001277 pectin Polymers 0.000 claims description 7
- 239000003755 preservative agent Substances 0.000 claims description 7
- 239000002562 thickening agent Substances 0.000 claims description 7
- 239000002202 Polyethylene glycol Substances 0.000 claims description 6
- 239000002781 deodorant agent Substances 0.000 claims description 6
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- 229920001296 polysiloxane Polymers 0.000 claims description 6
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- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
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- 239000010410 layer Substances 0.000 claims 30
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- 229920002126 Acrylic acid copolymer Polymers 0.000 claims 5
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims 5
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 claims 5
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims 5
- 239000001768 carboxy methyl cellulose Substances 0.000 claims 5
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims 5
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims 5
- 239000003623 enhancer Substances 0.000 claims 5
- 239000001863 hydroxypropyl cellulose Substances 0.000 claims 5
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 claims 5
- 229920002401 polyacrylamide Polymers 0.000 claims 5
- 239000007787 solid Substances 0.000 claims 3
- 229920001169 thermoplastic Polymers 0.000 claims 3
- 239000004416 thermosoftening plastic Substances 0.000 claims 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims 2
- 125000001931 aliphatic group Chemical group 0.000 claims 2
- 125000003118 aryl group Chemical group 0.000 claims 2
- 239000002985 plastic film Substances 0.000 claims 2
- 229920006255 plastic film Polymers 0.000 claims 2
- 239000007859 condensation product Substances 0.000 claims 1
- 229920001577 copolymer Polymers 0.000 claims 1
- 230000002708 enhancing effect Effects 0.000 claims 1
- 239000002657 fibrous material Substances 0.000 claims 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims 1
- 230000000977 initiatory effect Effects 0.000 claims 1
- 150000002596 lactones Chemical class 0.000 claims 1
- 239000000155 melt Substances 0.000 claims 1
- 229920000728 polyester Polymers 0.000 claims 1
- 229920000642 polymer Polymers 0.000 claims 1
- 239000011148 porous material Substances 0.000 claims 1
- 238000003825 pressing Methods 0.000 claims 1
- 230000001737 promoting effect Effects 0.000 claims 1
- 238000007151 ring opening polymerisation reaction Methods 0.000 claims 1
- 238000000926 separation method Methods 0.000 claims 1
- 239000002356 single layer Substances 0.000 claims 1
- 229920002125 Sokalan® Polymers 0.000 description 2
- LXCFILQKKLGQFO-UHFFFAOYSA-N methylparaben Chemical compound COC(=O)C1=CC=C(O)C=C1 LXCFILQKKLGQFO-UHFFFAOYSA-N 0.000 description 2
- QCDWFXQBSFUVSP-UHFFFAOYSA-N 2-phenoxyethanol Chemical compound OCCOC1=CC=CC=C1 QCDWFXQBSFUVSP-UHFFFAOYSA-N 0.000 description 1
- 244000007835 Cyamopsis tetragonoloba Species 0.000 description 1
- XPJVKCRENWUEJH-UHFFFAOYSA-N Isobutylparaben Chemical compound CC(C)COC(=O)C1=CC=C(O)C=C1 XPJVKCRENWUEJH-UHFFFAOYSA-N 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229920000229 biodegradable polyester Polymers 0.000 description 1
- 239000004622 biodegradable polyester Substances 0.000 description 1
- KKSIGYAOSIUIFU-UHFFFAOYSA-N butyl 4-hydroxybenzoate;propyl 4-hydroxybenzoate Chemical compound CCCOC(=O)C1=CC=C(O)C=C1.CCCCOC(=O)C1=CC=C(O)C=C1 KKSIGYAOSIUIFU-UHFFFAOYSA-N 0.000 description 1
- 229960001617 ethyl hydroxybenzoate Drugs 0.000 description 1
- 235000010228 ethyl p-hydroxybenzoate Nutrition 0.000 description 1
- 239000004403 ethyl p-hydroxybenzoate Substances 0.000 description 1
- NUVBSKCKDOMJSU-UHFFFAOYSA-N ethylparaben Chemical compound CCOC(=O)C1=CC=C(O)C=C1 NUVBSKCKDOMJSU-UHFFFAOYSA-N 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- -1 gums Polymers 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 235000010270 methyl p-hydroxybenzoate Nutrition 0.000 description 1
- 239000004292 methyl p-hydroxybenzoate Substances 0.000 description 1
- 229960002216 methylparaben Drugs 0.000 description 1
- 239000006174 pH buffer Substances 0.000 description 1
- 229960005323 phenoxyethanol Drugs 0.000 description 1
- 229920001983 poloxamer Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000012748 slip agent Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
Classifications
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
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- B29C65/76—Making non-permanent or releasable joints
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F5/00—Orthopaedic methods or devices for non-surgical treatment of bones or joints; Nursing devices; Anti-rape devices
- A61F5/44—Devices worn by the patient for reception of urine, faeces, catamenial or other discharge; Portable urination aids; Colostomy devices
- A61F5/445—Colostomy, ileostomy or urethrostomy devices
-
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- A61L28/00—Materials for colostomy devices
- A61L28/0034—Use of materials characterised by their function or physical properties
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- A61L28/00—Materials for colostomy devices
- A61L28/0034—Use of materials characterised by their function or physical properties
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C66/73791—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined degradable biodegradable
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- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0059—Degradable
- B29K2995/0062—Degradable water-soluble
-
- 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
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1334—Nonself-supporting tubular film or bag [e.g., pouch, envelope, packet, etc.]
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Epidemiology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Nursing (AREA)
- Biodiversity & Conservation Biology (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
- Laminated Bodies (AREA)
- Wrappers (AREA)
- Absorbent Articles And Supports Therefor (AREA)
- Toilet Supplies (AREA)
- Non-Flushing Toilets (AREA)
- Refuse Receptacles (AREA)
- Bag Frames (AREA)
Abstract
A flushable biodegradable pouch having water-dispersible fibers along at least a portion of the outer surface of the pouch's cover layer provided with a water-soluble hydrophilic coating. The pouch's cover layer is water-disintegratable, and the water-soluble hydrophilic coating is a lubricating agent capable of becoming slippery when exposed to water and, upon subsequent drying, again becoming water-soluble upon re-exposure to water. As such, the hydrophilic coating serves as a rewettable, redesolving-lubricating agent.
Description
IMPROVEMENTS IN FLUSHABLE BODY WASTE COLLECTION
POUCHES, POUCH-IN-POUCH APPLIANCES USING THE SAME, AND
METHODS PERTAINING THERETO
BACKGROUND AND SUMMARY
[0001] Giori Published Patent Application US 2005/0084634 (also published as WO 2005/041827) discloses a biodegradable and toilet-flushable body waste collection pouch, and an appliance and method in which such a pouch constitutes the inner pouch of a peelably separable pouch-in-pouch system. The walls of the inner pouch are composed of an ultra-thin, heat-sealable film impermeable to body wastes comprising a plasticized biodegradable polyester or copolyester externally covered by a soft and water-disintegratable cover layer of biodegradable and water-dispersible fibers. The cover layer and film are weakly bonded together in such a way as to avoid pinholes in the film that might otherwise be caused by the fibers.
When used as the inner pouch of a pouch-in-pouch system, the film of the outer pouch is selected to have a melting temperature higher than that of the inner pouch film, with the result that a peripheral heat seal joining the walls of the two pouches together will allow the walls of the outer pouch to be peeled away without delaminating the film and cover layers of the inner pouch.
POUCHES, POUCH-IN-POUCH APPLIANCES USING THE SAME, AND
METHODS PERTAINING THERETO
BACKGROUND AND SUMMARY
[0001] Giori Published Patent Application US 2005/0084634 (also published as WO 2005/041827) discloses a biodegradable and toilet-flushable body waste collection pouch, and an appliance and method in which such a pouch constitutes the inner pouch of a peelably separable pouch-in-pouch system. The walls of the inner pouch are composed of an ultra-thin, heat-sealable film impermeable to body wastes comprising a plasticized biodegradable polyester or copolyester externally covered by a soft and water-disintegratable cover layer of biodegradable and water-dispersible fibers. The cover layer and film are weakly bonded together in such a way as to avoid pinholes in the film that might otherwise be caused by the fibers.
When used as the inner pouch of a pouch-in-pouch system, the film of the outer pouch is selected to have a melting temperature higher than that of the inner pouch film, with the result that a peripheral heat seal joining the walls of the two pouches together will allow the walls of the outer pouch to be peeled away without delaminating the film and cover layers of the inner pouch.
[0002] Pedersen et al Published Patent Application US 2005/0113770 (also published as WO 2005/041828) discloses an ostomy appliance having a face plate assembly and inner and outer pouches joined thereto. The outer pouch is provided with one or more peripherally-extending sealing seams that allow the walls of the outer pouch to be separated by peeling fc?rces applied in directions transverse to such seam or seams. in preferred embodiments, the sealing seams also peelably join the peripheral edges of the outer pouch to those of the inner pouch. A method of disposing of the pouch assembly of such an ostomy appliance is also disclosed.
[0003] The disclosures of these aforementioned published applications US
2005/0084634 and US 2005/01 13770, the specifications and drawings of which are annexed hereto as Annex 1 and 2, respectively, are fully incorporated in this application by reference.
2005/0084634 and US 2005/01 13770, the specifications and drawings of which are annexed hereto as Annex 1 and 2, respectively, are fully incorporated in this application by reference.
[0004] It has now been found that the flushability of a biodegradable pouch as disclosed in these published applications, and the passage of such a pouch through a sewer system, are greatly enhanced if the water-dispersible fibers along at least a portion of the outer surface of the pouch's cover layer (which is preferably formed of a nonwoven material, particularly a water-disintegratable paper such as cellulosic toilet tissue) are provided with a hydrophilic coating. The coating does not impair the peelability of the seals of a pouch-in-pouch system or interfere with the water dispersibility of the fibers, and is found to be advantageous because it reduces the friction between the outer surface of the pouch and the walls of a flush toilet and passages of a sanitary sewer system. While the coating would normally be applied and dried during production of such a pouch or pouch assembly, or during the tissue paper-film manufacture, it is contemplated that alternatively such a coating might be applied by a user, as by spraying, just prior to discarding the pouch and its contents into a flush toilet.
[0005] When applied in production, the coating in the form of a water-based hydrophilic solution is sprayed, rolled, or otherwise applied to the surface of the pouch's tissue cover layer. It is then dried by any suitable means, as in a convection oven. When the pouch is later discarded into the water of a flush toilet, the coating absorbs water and reactivates a hydrophilic film that makes the surface of the pouch slippery, significantly reducing the friction between the pouch and the walls of the toilet and sewer passages.
This reduced surface friction has a positive impact on the flush performance of the pouch.
This reduced surface friction has a positive impact on the flush performance of the pouch.
[0006] The biodegradable coating contains one or more lubricating agents.
One preferred geiling agent is hydroxyethylcellulose, available under the commercial name "Natrosol" from Aqualon, but other lubricating agents consideredsuitab9e are hydroxypropyiceiiuiose, c.-;:xyrnethyiceiiuiose and their salts, guar gums, gelatin, pectin, polyethylene glycol, poiyethyleneoxide, po6yacrylamides, acrylic acid polymers and their salts, and water-soluble silicone gelling agents. Of particular importance is that such a lubricating agent, after drying following initial exposure to water, must be capable of again becoming water soluble and slippery when re-exposed to water. Thus, it has been found that polyvinyl alcohol is unsuitabie as a gelling agent for use in this invention because although it becomes slippery upon initiai hydration, once it has dried it is no longer water-soluble. A lubricating agent for use in this invention must be capable of rewetting/redesolving to avoid the risk that the drying of the coating might cause a pouch to stick to the wall of a sewer pipe and not readily release when water is again flushed through the pipe.
One preferred geiling agent is hydroxyethylcellulose, available under the commercial name "Natrosol" from Aqualon, but other lubricating agents consideredsuitab9e are hydroxypropyiceiiuiose, c.-;:xyrnethyiceiiuiose and their salts, guar gums, gelatin, pectin, polyethylene glycol, poiyethyleneoxide, po6yacrylamides, acrylic acid polymers and their salts, and water-soluble silicone gelling agents. Of particular importance is that such a lubricating agent, after drying following initial exposure to water, must be capable of again becoming water soluble and slippery when re-exposed to water. Thus, it has been found that polyvinyl alcohol is unsuitabie as a gelling agent for use in this invention because although it becomes slippery upon initiai hydration, once it has dried it is no longer water-soluble. A lubricating agent for use in this invention must be capable of rewetting/redesolving to avoid the risk that the drying of the coating might cause a pouch to stick to the wall of a sewer pipe and not readily release when water is again flushed through the pipe.
[0007] In addition to a lubricating agent or agents, the coating material may include preservatives, surfactants, thickeners, pH buffers, slip agents, odor neutraiizers, deodorants and other additives. Examples of thickeners include, but are not limited to, carbomers, gums, poloxamers, gelatin, pectin and nonionic, zwitterionic and ionic gel formers.
[0008] By way of example, a coating solution of 2% hydroxyethylcellulose (Natrosol) and 0.3% Phenonip (a commercial mixture of preservatives containing phenoxyethanol, methylparaben, ethylparaben, propylparaben butylparaben and isobutylparaben) may be applied to the paper tissue layer (25g Shawano cellulosic tissue code 3040 from Shawano Specialty Papers) of a waste collection pouch as disclosed in the aforementioned published applications, the disclosures of which are incorporated herein by reference.
The coating is then dried by placing the pouch in a convection oven at 75 C
for approximately one hour. Drying may also be achieved by using infrared lamps, heating elements or other sources of heat, and may be boosted by negative pressure and air circulation.
The coating is then dried by placing the pouch in a convection oven at 75 C
for approximately one hour. Drying may also be achieved by using infrared lamps, heating elements or other sources of heat, and may be boosted by negative pressure and air circulation.
[0009] The desired load of coating may be achieved in single or multiple applications.
[0010] It has been found that an inner pouch of the type disclosed the aforementioned published applications, formed of an ultra thin biodegradable y.,, $isw t:rs ~8r~.4 ......
fBic -~''~'e..?Cs rtaa -arag l~a ~ without +5.~64.. ha s~4r oro 6t~~.TE3~8i . . . .... . . .. ~56 ' =:+.7~l'~iiJ V~i66i0iay~iie- but V~7iCi6iJt]i8.6 06Pt.. iratlt~tiiiga.8i"v'a~st;:~~i,; .. ... .. . .. ...
herein, may be safely flushed through a toilet with a pouch load of up to about 110 g, whereas if the tissue layer of a similar pouch is provided with the hydrophilic coating of this invention, the pouch load may be safely and effectively increased to 150 g.
fBic -~''~'e..?Cs rtaa -arag l~a ~ without +5.~64.. ha s~4r oro 6t~~.TE3~8i . . . .... . . .. ~56 ' =:+.7~l'~iiJ V~i66i0iay~iie- but V~7iCi6iJt]i8.6 06Pt.. iratlt~tiiiga.8i"v'a~st;:~~i,; .. ... .. . .. ...
herein, may be safely flushed through a toilet with a pouch load of up to about 110 g, whereas if the tissue layer of a similar pouch is provided with the hydrophilic coating of this invention, the pouch load may be safely and effectively increased to 150 g.
Claims (46)
1. A biodegradable body waste collection pouch particularly suitable for flush toilet disposability; said pouch having a pair of walls secured together along their peripheral edges to define a waste-receiving chamber therebetween; one of said side walls having a waste-receiving opening therethrough communicating with said chamber; and external attachment means provided about said opening for attachment of said pouch to a wearer;
said walls of said pouch being cut from a laminate composed of (a) a layer of thin heat-sealable film impermeable to liquid and solid body wastes and of a composition comprising a biodegradable aliphatic polyester, or a biodegradable aliphatic-aromatic copolyester, or blends thereof, plasticized by one or more biodegradable plasticizers and (b) a water-disintegratable biodegradable cover layer of water-dispersible fibers having one of its surfaces uninterruptedly bonded thereto; said fibers along at least a portion of the outer surface of said pouch being coated with a water-soluble hydrophilic lubricating agent capable of becoming slippery when exposed to water and, upon subsequent drying, again becoming water-soluble upon re-exposure to water.
said walls of said pouch being cut from a laminate composed of (a) a layer of thin heat-sealable film impermeable to liquid and solid body wastes and of a composition comprising a biodegradable aliphatic polyester, or a biodegradable aliphatic-aromatic copolyester, or blends thereof, plasticized by one or more biodegradable plasticizers and (b) a water-disintegratable biodegradable cover layer of water-dispersible fibers having one of its surfaces uninterruptedly bonded thereto; said fibers along at least a portion of the outer surface of said pouch being coated with a water-soluble hydrophilic lubricating agent capable of becoming slippery when exposed to water and, upon subsequent drying, again becoming water-soluble upon re-exposure to water.
2. The collection pouch of claim 1 in which said hydrophilic lubricating agent is selected from the group consisting of hydroxyethylcellulose, hydroxypropylcellulose, carboxymethylcellulose and their salts, polyethylene glycol, gums, gelatin, pectin, polyethyleneoxide, polyacrylamides, acrylic acid copolymers and their salts, and water-soluble silicone lubricating agents, optionally in a combination with one or more thickeners, preservatives odor neutralizers/deodorants, and solublization enhancers.
3. The collection pouch of claims 1 or 2 in which said hydrophilic lubricating agent is dry but, when said pouch is immersed in water in a flush toilet for a period less than 60 seconds, preferably less than 30 seconds, and more preferably less than 15 seconds, becomes hydrated and slippery, so as to promote flushability of the pouch and facilitate its passage through a sanitary sewer system.
4. The collection pouch of claims 1, 2 or 3 in which the thickness of said film is no greater than about 40 microns, preferably within the range of about 10 to 35 microns, and more preferably within the range of about 15 to 30 microns.
5. The collection pouch of any of the preceding claims in which said layers of said laminate are weakly bonded together and may be separated from each other with each layer remaining intact by the application of 180-degree peeling forces in the range of about 2 to 10 g/in, more preferably in the range of about 3 to 10 g/in.
6. The collection pouch of any of the preceding claims in which said composition comprises a blend of about 70% to 95% by weight, preferably 75% to 93% by weight, and more preferably about 90% by weight of said biodegradable aliphatic polyester or aliphatic-aromatic copolyester, and about 5% to 30% by weight, preferably 7% to 25% by weight, and more preferably about 10% by weight of one or more of said biodegradable plasticizer or plasticizers.
7. The collection pouch of any of the preceding claims in which said aliphatic polyester or the aliphatic component of said copolyester comprises a polymer formed by ring-opening polymerization of a lactone.
8. The collection pouch of any of the preceding claims in which said aliphatic-aromatic copolymer comprises a condensation product of a glycol with a combination of an aliphatic diacid and an aromatic diacid, wherein the aromatic diacid is less than 20% by mole.
9. The collection pouch of any of the preceding claims in which said film of a biodegradable aliphatic polyester or copolyester is a monolayer.
10. The collection pouch of any of the preceding claims in which said fibers of said water-disintegratable cover layer are cellulosic.
11. The collection pouch of claim 10 in which said cover layer comprises tissue paper formed of 100% cellulosic fibers.
12. The collection pouch of any of the preceding claims in which said cover layer is heat-bonded to said film.
13. A method of promoting the flushability of a waste collection pouch in a flush toilet, comprising the steps of providing a pouch with a pair of walls secured together along their peripheral edges to define a waste-receiving chamber therebetween; one of said walls having a waste-receiving opening therethrough communicating with said chamber; said walls being formed from a laminate composed of (a) a layer of thin heat-sealable film impermeable to liquid and solid body wastes and of a composition comprising a biodegradable aliphatic polyester, or a biodegradable aliphatic-aromatic copolyester, or blends thereof, plasticized by one or more biodegradable plasticizers, and (b) a water-disintegratable biodegradable cover layer of water-dispersible fibers having one of its surfaces uninterruptedly bonded thereto, comprising the step of coating said fibers along at least a portion of the outer surface of said laminate, either before or after assembly of said pouch, with a water-soluble hydrophilic lubricating agent capable of becoming slippery when the outer surfaces of said pouch are exposed to water and, upon subsequent drying, again become water-soluble upon re-exposure to water.
14. The method of claim 13 in which said hydrophilic lubricating agent is selected from the group consisting of hydroxyethylcellulose, hydroxypropylcellulose, carboxymethylcellulose and their salts, polyethylene glycol, gums, gelatin, pectin, polyethyleneoxide, polyacrylamides, acrylic acid copolymers and their salts, and water-soluble silicone gelling agents, optionally in combination with one or more thickeners, preservatives, odor neutralizers, deodorants, and solublization enhancers.
15. The method of claims 13 or 14 in which said hydrophilic lubricating agent is in the form of a dry coating but, when said pouch is exposed to water in a flush toilet for a period less than 60 seconds, preferably less than 30 seconds, and more preferably less that 15 seconds, becomes hydrated and slippery, so as to promote flushability of the pouch and facilitate its passage through a sanitary sewer system.
16. The method of claims 13 and 14 in which said step of coating said fibers along at least a portion of said outer surface with said water-soluble hydrophilic lubricating agent occurs immediately prior to discarding said pouch and its contents into a flush toilet.
17. The method of claim 16 in which said water-soluble lubricating agent is applied to said pouch in liquid form, such as by spraying.
18. A pouch-in-pouch body waste collection appliance comprising an outer pouch formed of liquid, gas and odor impermeable heat-sealable polymeric film having proximal and distal side walls defining a chamber; a toilet-disposable inner pouch having proximal and distal side walls and being disposed in said chamber; said proximal walls of said inner and outer pouches having aligned body waste receiving openings therethrough; and attachment means for attaching said proximal walls of said inner and outer pouches in areas surrounding said openings to skin surfaces of a patient about a body waste discharge orifice; said disposable inner pouch having walls formed from sheet material composed of (a) a layer of thin heat-sealable film impermeable to body wastes of a composition comprising a biodegradable aliphatic polyester, or a biodegradable aliphatic-aromatic copolyester, or blends thereof, plasticized by one or more biodegradable plasticizers and (b) a water-disintegratable, porous, biodegradable cover layer of water-dispersible fibers bonded thereto; said heat-sealable film of said inner pouch having a melting temperature lower than that of the heat-sealable film of said outer pouch;
said walls of said outer and inner pouches having peripheral edge portions heat-sealed together with the peripheral edge portions of said cover layer being bonded more securely to the film material of said inner pouch than to the film material of said outer pouch; said fibers along at least a portion of the outer surface of the walls of said inner pouch being coated with a water soluble hydrophilic lubricating agent capable of becoming slippery when exposed to water and, upon subsequent drying, again becoming water-soluble upon re-exposure to water.
said walls of said outer and inner pouches having peripheral edge portions heat-sealed together with the peripheral edge portions of said cover layer being bonded more securely to the film material of said inner pouch than to the film material of said outer pouch; said fibers along at least a portion of the outer surface of the walls of said inner pouch being coated with a water soluble hydrophilic lubricating agent capable of becoming slippery when exposed to water and, upon subsequent drying, again becoming water-soluble upon re-exposure to water.
19. The collection appliance of claim 18 in which said hydrophilic lubricating agent is selected from the group consisting of hydroxyethylcellulose, hydroxypropylcellulose, carboxymethylcellulose and their salts, polyethylene glycol, gums, gelatin, pectin, polyethyleneoxide, polyacrylamides, acrylic acid copolymers and their salts, and water-soluble silicone gelling agents, optionally in combination with one or more thickeners, preservatives, odor neutralizers, deodorants, and solublization enhancers.
20. The collection appliance of claims 18 or 19 in which said hydrophilic lubricating agent is in the form of a dry coating on fibers of said cover layer but, when said inner pouch is immersed in water in a flush toilet for a period less than 60 seconds, preferably less than 30 seconds, and more preferably less than 15 seconds, becomes hydrated and slippery, so as to promote flushability of said inner pouch and facilitate its passage though a sanitary sewer system.
21. A method of making a pouch-in-pouch body waste collection appliance having an outer pouch formed of odor-impermeable thermoplastic film with proximal and distal walls defining a chamber and a toilet-disposable inner pouch having proximal and distal walls and being disposed in said chamber; said proximal walls of said inner and outer pouches having aligned body waste receiving openings therein; said walls of said inner pouch being formed of a laminate composed of (a) a layer of thin heat-sealable thermoplastic film, and (b) a porous water-disintegratable cover layer of water-dispersible fibers attached to exterior surfaces of said inner pouch film, said cover layer having at least some of said fibers along the exterior surface of said inner pouch coated with a water-soluble hydrophilic lubricating agent capable of becoming slippery when exposed to water and, upon subsequent drying, again becoming water-soluble upon re-exposure to water; wherein said method comprises the steps of selecting a material for the film of an inner pouch having a melting temperature substantially lower than that of the material of said outer pouch; and joining together peripheral portions of said walls of said inner and outer pouches, and portions of said proximal walls of said inner and outer pouches surrounding said body waste receiving openings, by simultaneously applying pressure and heat to said portions so that said proximal and distal walls of said inner pouch are welded together and, simultaneously, said film material of said inner pouch melts and invades the pores of said fibrous cover layer to a greater extent than said film material of said outer pouch, where, upon the subsequent application of peeling forces, said walls of said outer pouch may be peeled away from said inner pouch without causing separation of said cover and film layers of said inner pouch.
22. The method of claim 21 in which said fibers along the peripheral portion of said inner pouch joined to said peripheral portion of said outer pouch are coated with said water-soluble hydrophilic lubricating agent.
23. The method of claim 21 in which said fibers along the peripheral portion of said inner pouch joined to said peripheral portion of said outer pouch are not coated by said water-soluble hydrophilic lubricating agent.
24. The method of claims 21, 22 or 23 in which said film material of said inner pouch has a melting temperature at least 10°C below the melting temperature of said outer pouch film.
25. The method of claims 21, 22, 23 or 24 in which said fibers of said cover layer are cellulosic or other equivalent material.
26. The method of claim 25 in which said cover layer comprises tissue paper of 100% cellulosic fibers.
27. The method of claim 21 in which said cover layer and said thermoplastic film of said inner pouch, throughout the areas between said peripheral portions and said portions surrounding said openings, are weakly bonded together and may be separated from each other with each layer remaining intact by the application of 180-degree peeling forces in the range of about 2 to 10 g/in and preferably in the range of 3 to 6 g/in.
28. The method of claim 21 in which said film of said inner pouch has a thickness no greater than about 40 microns, preferably in the range of about 10 to 35 microns, and more preferably in the range of about 15 to 30 microns.
29. An ostomy appliance for receiving discharge from a human stoma and comprising attachment means for attaching the appliance to the peristomal skin surface of a user of the appliance, and an ostomy assembly comprising:
an inner pouch attached to said attachment means and having a first aperture for receiving the stoma of said user, said inner pouch being defined by a flexible body side or proximal inner pouch wall and a flexible distal inner pouch wall, and one or more peripherally extending Inner pouch sealing seams, an outer pouch enclosing said inner pouch, attached to said attachment means and having a second aperture for receiving said stoma and being aligned with said first aperture, said outer pouch being defined by a flexible bodyside or proximal outer pouch wall and a flexible distal outer pouch wall, and one or more peripherally extending outer pouch sealing seams, said one or more outer pouch sealing seams being manually peelable such that the attachment forces provided by said one or more peelable outer pouch sealing seams may be manually eliminated by manually pulling said distal outer pouch wall in a direction transverse to said one or more peelable outer pouch sealing seams, said inner pouch walls being made of a plastic film laminated to a web of a non-woven fibrous material such as paper, preferably a paper of a toilet tissue type, said web facing outwards relative to the interior of said pouch and having an externally exposed coating of a water-soluble hydrophilic lubricating agent capable of becoming slippery when exposed to water and, upon subsequent drying, again becoming water-soluble and slippery upon re-exposure to water.
an inner pouch attached to said attachment means and having a first aperture for receiving the stoma of said user, said inner pouch being defined by a flexible body side or proximal inner pouch wall and a flexible distal inner pouch wall, and one or more peripherally extending Inner pouch sealing seams, an outer pouch enclosing said inner pouch, attached to said attachment means and having a second aperture for receiving said stoma and being aligned with said first aperture, said outer pouch being defined by a flexible bodyside or proximal outer pouch wall and a flexible distal outer pouch wall, and one or more peripherally extending outer pouch sealing seams, said one or more outer pouch sealing seams being manually peelable such that the attachment forces provided by said one or more peelable outer pouch sealing seams may be manually eliminated by manually pulling said distal outer pouch wall in a direction transverse to said one or more peelable outer pouch sealing seams, said inner pouch walls being made of a plastic film laminated to a web of a non-woven fibrous material such as paper, preferably a paper of a toilet tissue type, said web facing outwards relative to the interior of said pouch and having an externally exposed coating of a water-soluble hydrophilic lubricating agent capable of becoming slippery when exposed to water and, upon subsequent drying, again becoming water-soluble and slippery upon re-exposure to water.
30. An ostomy appliance of claim 29 wherein said non-woven material and/or said plastic film are biodegradable.
31. An ostomy appliance of any of claims 29 and 30 wherein said inner pouch walls are impermeable to liquid and gas and permeable to odors, and said outer pouch walls are impermeable to liquid, gas and odors.
32. An ostomy appliance of claim 31 wherein said one or more outer pouch peeling seams comprises a peeling action initiation zone, where said one or more outer pouch sealing seams comprises a peak-like extent tapering in the direction opposite a predetermined peeling direction.
33. An ostomy appliance of any of claims 29-32 wherein said one or more outer pouch peeling seams comprises a peeling action ending zone, where said one or more outer pouch sealing seams comprises a peak-like extent tapering in a predetermined peeling direction.
34. An ostomy appliance according to claim 33 wherein said proximal outer pouch wall is attached to said attachment means by a heat sealed sealing seam.
35. An ostomy appliance according to any of claims 29-34 wherein said hydrophilic lubricating agent is selected from the group consisting of hydroxyethylcellulose, hydroxypropylcellulose, carboxymethylcellulose and their salts, gums, gelatin, pectin, polyethylene glycol, polyethylene oxide, polyacrylamides, acrylic acid copolymers and their salts, and water-soluble silicone gelling agents, optionally in combination with one or more thickeners, preservatives, odor neutralizer, deodorants, and solublization enhancers.
36. An ostomy appliance according to any of claims 29-35 wherein said hydrophilic lubricating agent is dry but, when said inner pouch is immersed in water in a flush toilet for a period less than 60 seconds, preferably less than 30 seconds, and more preferably less than 15 seconds, becomes hydrated and slippery, so as to promote flushability of the inner pouch and facilitate its passage though a sanitary sewer system.
37. A pouch-in-pouch body waste collection appliance comprising an outer pouch formed of liquid, gas and odor impermeable heat-sealable polymeric film having proximal and side walls defining a chamber; a toilet-disposable inner pouch having proximal and distal side walls and being disposed in said chamber; said proximal walls of said inner and outer pouches having aligned body waste receiving openings therethrough; and attachment means for attaching said proximal walls of said inner and outer pouches in areas surrounding said openings to skin surfaces of a patient about a body waste discharge orifice; said disposable inner pouch having walls formed from sheet material composed of (a) a layer of thin heat-sealable polymeric film impermeable to body wastes and (b) a water-disintegratable, porous, biodegradable cover layer of water-dispersible fibers bonded thereto; said fibers along at least outer surface portions of the walls of said inner pouch being coated with a water-soluble hydrophilic lubricating agent capable of becoming slippery when exposed to water and, upon subsequent drying, again becoming water-soluble upon re-exposure to water.
38. A method for enhancing the toilet flushability of an article comprised of a thin polymeric film covered by a water-disintegratable fibrous cover layer bonded to the outer surface thereof, comprising the step of modifying said cover layer by coating at least some of said fibers along the outer surface of said article with a hydrophilic agent that become lubricious upon hydration.
39. The method of claim 38 in which said hydrophilic agent is selected from the group consisting of hydroxyethylcellulose, hydroxypropylcellulose, carboxymethylcellulose and their salts, polyethylene glycol, gums, gelatin, pectin, polyethyleneoxide, polyacrylamides, acrylic acid copolymers and their salts, and water-soluble silicone lubricating agents, optionally in combination with one or more thickeners, preservatives odor neutralizers/deodorants, and solublization enhancers.
49. The method of claims 38 or 39 in which said polymeric film is heat-sealable and impermeable to liquid and solid body wastes.
41. The method of claim of 40 in which said film comprises a biodegradable aliphatic polyester, or a biodegradable aliphatic-aromatic co-polyester, or blends thereof, plasticized by one or more biodegradable plasticizers.
42. The method of any of claims 38-41 in which thickness of said film is no greater than about 40 microns, preferably within the range of about to 35 microns, and more preferably within the range of about 15 to 30 microns.
43. The method of any of claims 38-42 in which said cover layer is a nonwoven material formed of water-dispersible fibers.
44. The method of claim 43 in which said fibers of said water-disintegrable cover layer are cellulosic.
45. The method of claim 44 in which said cover layer comprises tissue paper formed of 100% cellulosic fibers.
46. The method of claim 38 in which said fibers coated by said hydrophilic agent are located along the outer surface of said fibrous layer cover.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US74018105P | 2005-11-28 | 2005-11-28 | |
US60/740,181 | 2005-11-28 | ||
PCT/US2006/061164 WO2007079290A2 (en) | 2005-11-28 | 2006-11-21 | Flushable body collection pouches, pouch- in- pouch appliances using the same, and methods of making the same |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2625268A1 true CA2625268A1 (en) | 2007-07-12 |
CA2625268C CA2625268C (en) | 2014-01-28 |
Family
ID=38228907
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA2625268A Expired - Fee Related CA2625268C (en) | 2005-11-28 | 2006-11-21 | Improvements in flushable body waste collection pouches, pouch-in-pouch appliances using the same, and methods pertaining thereto |
Country Status (6)
Country | Link |
---|---|
US (1) | US8118797B2 (en) |
EP (1) | EP1973505A2 (en) |
JP (1) | JP2009517193A (en) |
AU (1) | AU2006332603B2 (en) |
CA (1) | CA2625268C (en) |
WO (1) | WO2007079290A2 (en) |
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-
2006
- 2006-11-21 WO PCT/US2006/061164 patent/WO2007079290A2/en active Application Filing
- 2006-11-21 CA CA2625268A patent/CA2625268C/en not_active Expired - Fee Related
- 2006-11-21 AU AU2006332603A patent/AU2006332603B2/en not_active Ceased
- 2006-11-21 EP EP06849133A patent/EP1973505A2/en not_active Withdrawn
- 2006-11-21 JP JP2008543560A patent/JP2009517193A/en active Pending
- 2006-11-21 US US12/095,298 patent/US8118797B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
AU2006332603B2 (en) | 2011-09-15 |
WO2007079290A2 (en) | 2007-07-12 |
US20080294129A1 (en) | 2008-11-27 |
US8118797B2 (en) | 2012-02-21 |
JP2009517193A (en) | 2009-04-30 |
AU2006332603A1 (en) | 2007-07-12 |
EP1973505A2 (en) | 2008-10-01 |
WO2007079290A8 (en) | 2007-11-01 |
CA2625268C (en) | 2014-01-28 |
WO2007079290A3 (en) | 2008-07-31 |
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