WO1999034881A2 - Method and apparatus for improving adhesion between golf ball layers - Google Patents
Method and apparatus for improving adhesion between golf ball layers Download PDFInfo
- Publication number
- WO1999034881A2 WO1999034881A2 PCT/US1999/000566 US9900566W WO9934881A2 WO 1999034881 A2 WO1999034881 A2 WO 1999034881A2 US 9900566 W US9900566 W US 9900566W WO 9934881 A2 WO9934881 A2 WO 9934881A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- core
- pattern
- surface profile
- mils
- peaks
- Prior art date
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Classifications
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B45/00—Apparatus or methods for manufacturing balls
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0003—Golf balls
- A63B37/0004—Surface depressions or protrusions
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0003—Golf balls
- A63B37/007—Characteristics of the ball as a whole
- A63B37/0072—Characteristics of the ball as a whole with a specified number of layers
- A63B37/0075—Three piece balls, i.e. cover, intermediate layer and core
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0003—Golf balls
- A63B37/007—Characteristics of the ball as a whole
- A63B37/0072—Characteristics of the ball as a whole with a specified number of layers
- A63B37/0076—Multi-piece balls, i.e. having two or more intermediate layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/42—Moulds or cores; Details thereof or accessories therefor characterised by the shape of the moulding surface, e.g. ribs or grooves
- B29C33/424—Moulding surfaces provided with means for marking or patterning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1657—Making multilayered or multicoloured articles using means for adhering or bonding the layers or parts to each other
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1657—Making multilayered or multicoloured articles using means for adhering or bonding the layers or parts to each other
- B29C2045/166—Roughened surface bonds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1671—Making multilayered or multicoloured articles with an insert
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/54—Balls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/54—Balls
- B29L2031/545—Football balls
Definitions
- the present invention is directed toward golf balls having improved adhesion between adjacent component layers, as well as to methods for forming such golf balls .
- Conventional golf balls can be divided into three general types or groups: (1) two piece balls, (2) wound balls (also known as three piece balls) and (3) multilayer balls. The difference in play characteristics resulting from these different types of constructions can be quite significant .
- Balls having a two piece construction are generally most popular with the average recreational golfer because they are relatively durable while also providing maximum distance.
- Two piece balls are made with a single solid core, usually formed of a crosslinked rubber, which is encased by a cover material .
- the solid core is composed of polybutadiene which is chemically crosslinked with zinc diacrylate and/or similar crosslinking agents and is covered by a cover material such as an ionomer resin (e.g., SURLYN ® (DuPont) and Iotek ® (Exxon)) or blends thereof, polyurethane or balata (transpolyisoprene rubber) .
- a cover material such as an ionomer resin (e.g., SURLYN ® (DuPont) and Iotek ® (Exxon)) or blends thereof, polyurethane or balata (transpolyisoprene rubber) .
- Wound balls typically have either a solid rubber or liquid center core around which many yards of a stretched elastic thread or yarn are wound. The wound core is then covered with a durable cover material such as an ionomer resin or a softer material such as balata or polyurethane. Wound balls are generally softer and provide more spin than two piece balls, which enables a skilled golfer to exercise greater control over the ball's flight and final position. Relatively recently, a number of golf ball manufacturers have introduced multilayer golf balls in an effort to overcome some of the undesirable aspects of conventional two-piece balls such as their hard feel, while maintaining the positive attributes of these balls such as their increased initial velocity and distance.
- Multilayer golf balls can be formed using a variety of constructions.
- multilayer balls may have two or more cover layers molded around a conventional core.
- they may comprise a conventional cover and a core with one or more intermediate layers interposed between the cover and the core.
- multilayer balls may be formed from cores having more than one core layer and may optionally contain one or more intermediate and/or cover layers.
- Multilayer balls may even comprise a conventional wound core around which at least one intermediate layer and/or at least one cover layer is formed.
- multilayer balls examples include the Episode (Titleist) , Altus Newing (Bridgestone) , Giga (Spalding) , Metal Mix (Dunlop) and Ultra Tour Balata (Wilson) .
- the layers of multilayer golf balls are formed by molding them around the core or a preceding intermediate layer or cover layer.
- Conventional techniques for applying such layers include injection molding, compression molding and casting the layer material around the preceding core or layer. Accordingly, a crucial aspect of the manufacture of multilayer balls is obtaining good adhesion between the various layers. If the adhesion between the layers does not meet desired standards, the performance of the golf ball will be adversely affected. For example, poor adhesion can cause air pockets between the layers which can result in separation of the layers when the ball is struck with a club.
- channels 1/16 of an inch deep which encircle the outer surface of the core and pass through both polar areas thereof. Providing such channels was found to prevent separation of the cover from the core when the ball is struck with a golf club by eliminating the entrapment of air between 5 the cover and the core during the compression molding process .
- United States Patent No. 697,925 discloses game balls wherein a metallic core is covered by a soft rubber envelope which contains a plurality of deep "pits" extending about halfway through the envelope.
- a hard shell material is compression molded around the core/envelope such that the shell material flows into the pits, thereby forming prongs which interlock the hard shell with the soft rubber envelope .
- the '706 patent discloses the general concept of roughening the core surface to improve adhesion, it does not provide any details as to how the core surface is roughened nor any specifics regarding the characteristics of the corrugations in the core surface.
- United States Patent No. 4,367,873 discloses making a softball or a baseball having a PVC foam core and an ethylene copolymer core cover, wherein the core cover has corrugations one eighth to one sixteenth of an inch high. A layer of yarn windings is wound around the core cover and a leather outer cover is then placed around the windings.
- the '873 patent discloses that such corrugations may have a buffering effect when the ball is impacted and provide a more resilient ball as well as possibly increasing the binding friction between the outer leather cover and the . inner core .
- One conventional method for improving the adhesion between the layers of a multilayer golf ball is to texture the outer surface of, e.g., a core or a core with an intermediate layer (s) molded around it by manually roughening or scuffing the outer surface after molding and prior to forming the subsequent layer thereon.
- Such surface roughening is typically obtained by grinding the surface with a grinder such as a Glebar grinder or by tumbling or milling the ball at various stages of its construction in an abrasive media.
- the surface may be roughened by blasting the surface of the layer with sand or some other abrasive material .
- the loose material and/or excess abrasive material which remains on the surface will form air pockets when the next layer is molded thereon. As mentioned above, such air pockets are undesirable as they lead to separation of the layers. Further, the roughened surface must be completely dried before the next layer can be applied. If it is not dried completely, the remaining moisture is converted into steam when the next layer is molded around it, forming defects in the interfacial bonding area that can also lead to separation of the layers .
- post-molding roughening methods require, at a minimum, three distinct steps: 1) roughening the surface via grinding; 2) washing the roughened surface to remove excess debris; and 3) thoroughly drying the roughened surface before the next layer can be applied.
- Each of these process steps are labor intensive, time-consuming and add additional expense to the production of multilayer golf balls.
- the present invention is directed towards a method for improving the interfacial adhesion between the layers of golf balls, and multilayer golf balls in particular, as well as golf balls made from such methods.
- the present invention is directed to a method of forming a golf ball having improved interfacial adhesion between the layers forming the ball, wherein the ball comprises at least a cover and a core.
- the method comprises forming a finely textured pattern on the interior surface of a mold cavity for forming the core, said pattern comprising a plurality of depressions having a depth of about 2 to about 15 mils and a draft angle of less than about 10°.
- a core blend is introduced into the patterned cavity and a core is formed having a finely textured surface profile on . its outermost surface which is the corresponding image of the pattern of the mold and comprises a plurality of peaks having a maximum height of about 2 to about 15 mils .
- a cover material is subsequently applied to the textured core.
- the presently claimed method may further comprise forming one or more intermediate layers between the core and the cover, wherein the intermediate layer (s) also has a finely textured surface profile integrally formed in its outermost surface.
- Said intermediate layer is formed by placing the core into a second larger mold cavity, wherein the second cavity has a second finely textured pattern on the interior surface thereof, said pattern comprising a plurality of depressions having a depth of about 2 to about 15 mils and a draft angle of less than about 10°.
- the intermediate layer blend is introduced into the second cavity and an intermediate layer .
- the intermediate layer is formed about the core such that the intermediate layer is provided with a finely textured surface profile on its outermost surface which is a corresponding image of the pattern of the second mold cavity and comprises a plurality of peaks having a maximum height of about 2 to about 15 mils. cover material is subsequently applied to the textured intermediate layer.
- the present invention is also directed to a golf ball having at least a cover, a core and optionally one or more intermediate layers disposed between the cover and the core, wherein the core and/or at least one intermediate layer has a finely textured surface profile integrally formed on its outermost surface.
- the finely textured surface profile comprises a plurality of peaks having a maximum height of about 2 to about 15 mils.
- the finely textured surface profile may be a repeating pattern or it may be a random pattern of peaks . Such patterns may have peaks of a regular geometric shape or an irregular shape.
- the surface of the core, the intermediate layer (s) or both may have a finely textured surface profile integrally formed thereon. When more than one layer has a finely textured surface profile, such surface profiles may comprise the same or different patterns.
- the present invention is further directed towards a mold for forming a golf ball wherein the mold comprises a cavity having a finely textured pattern on the interior surface thereof, said textured surface comprising a plurality of depressions having a depth of about 2 mils to about 15 mils and a draft angle of less than about 10°.
- Figures 1A - IE illustrate several non-limiting examples of random finely textured surface profiles which are suitable for use in the present invention.
- Figures 2A-2D illustrate non-limiting examples of uniform finely textured surface profiles which are suitable for use in the present invention.
- Figures 3A and 3B provide enlarged views of a single depression of the finely textured mold cavity patterns employed in the present invention.
- the present invention is directed toward a method and apparatus for forming golf balls having improved interfacial adhesion between their layers, as well as to golf balls made according to such methods.
- the methods of the present invention provide a streamlined, more efficient method for improving such interfacial adhesion as compared to presently known methods. More specifically, as discussed above, the prior art discloses several complicated methods for promoting adhesion of the various layers of a golf ball. Such methods include forming channels (l/l6th of an inch or deeper) in the surface of an interior layer, forming deep pits extending halfway through the interior layer or forming an intricate series of protrusions in order to anchor preceding layers to an interior layer.
- the golf balls of the present invention comprise a cover and a core, and optionally at least one intermediate layer (e .g. , a mantle layer, inner cover layer or outer core layer) interposed between the cover and the core, wherein the outer surface of either the core, an intermediate layer (s) or both, has a finely textured surface profile integrally formed thereon.
- a golf ball of the present invention comprises more than one layer having a finely textured surface profile (e .g. , a textured core and a textured intermediate layer), the surface profiles may comprise the same or different patterns .
- the finely textured surface profiles employed in the present invention comprise a plurality of peaks integrally molded in the outermost surface of the core, the intermediate layer (s) or both.
- peaks refers to the raised areas extending from the surface of the core and/or intermediate layer (s).
- Several parameters must be considered in selecting the appropriate surface profile to be formed on the outer surface of a golf ball layer. These parameters include peak height, its shape and the pattern density. It is preferable that these parameters be selected to maximize the surface area available for interfacial bonding between the textured surface profile and the layer subsequently applied.
- the peaks of the finely textured surface profile have a maximum height of about 2 to about 15 mils, preferably about 2 to about 10 mils, more preferably about 3 to about 7 mils and most preferably about 4.5 mils. If the peaks have a maximum height of less than 2 mils, it has been found that the adhesion between the layers is not appreciably enhanced. Likewise, it has been found that if the height of the depressions is greater than 15 mils, it is very difficult to remove the core or intermediate layer from the mold cavity.
- the peaks may have the same maximum height, or alternatively, a plurality of the peaks may have a height that is less than the maximum height. Further, the peaks may comprise a regular shape that extends to a single point such as a pyramid or a cone. Alternatively, the peaks may have an irregular or jagged shape which provides additional surface area for interfacial bonding with the subsequent layer.
- the peaks which form the surface profiles may all be substantially the same width or may comprise a wide range of widths .
- peak density refers to the percentage (%) of the surface area of the outer surface of the layer which is covered by the peaks of the surface profile. For optimal results, it is preferred that the peak density be about 45 percent to about 75 percent, more preferably about 50 percent to about 70 percent and most preferably about 60 percent of the surface area of outer surface.
- the surface profiles employed in the present invention may comprise a wide variety of random or repeating patterns of peaks having various shapes.
- the finely textured surface profile may comprise a repeating pattern of peaks having a regular shape such as a diamond, hexagon or square.
- the finely textured surface profile may, in an alternate embodiment comprise a repeating pattern of peaks having an irregular shape.
- the finely textured surface profile may comprise a random pattern of non-uniformly shaped peaks .
- the desired features such as peak height, shape, and pattern density of the peaks of the surface profile must necessarily be considered when selecting a corresponding textured pattern for the interior surface of the mold.
- draft angle is well known in the molding art. It measures the angle at which the side wall of a depression varies from the perpendicular. If the draft angle is too small, the molded piece will not readily release from the mold. However, in the present invention, if the draft angle is too large, the resulting peaks formed in the surface of the golf ball layer will not provide sufficient interfacial adhesion.
- the draft angle of the depressions of the patterns formed in the mold must be less than about 10°, preferably about 2° to about 10°, more preferably about 4° to about 8° and most preferably about 6.5°.
- the finely textured surface profile is formed in the outer surface of the core and/or intermediate layer by integrally molding such a profile into the outer surface during the molding process used in forming the core and/or intermediate layer.
- the presently claimed method provides a more efficient and economical process for promoting surface adhesion over the methods presently known and employed in the art.
- the finely textured surface profile is formed on the outer surface of the core and/or intermediate layer using a modified mold cavity.
- prior art mold cavities employed to form core layers and/or intermediate layers have a substantially smooth interior surface in order to facilitate the release of molded material from the cavity.
- the interior surface of the mold cavity used in the present invention is adapted so as to have a finely textured pattern on its surface to produce a corresponding finely
- the depressions of the finely textured patterns have a maximum depth D.
- the pattern comprises a plurality of depressions having a maximum depth of about 2 to about
- the depressions of the finely textured patterns may have a regular shape and a substantially smooth bottom.
- the depressions of the finely textured patterns may have a regular shape and a substantially smooth bottom.
- the depressions of the finely textured patterns may also have an irregular shape with an uneven bottom so as to provide additional surface area for interfacial bonding with the layer that is subsequently applied.
- the depressions which form the patterns may all be substantially the same width or may comprise a variety of
- depression density refers to the percentage (%) of the surface area of the mold cavity's interior surface which is covered by the depressions of the finely textured pattern. For optimal results, it is
- the depression density be about 45 percent to about 75 percent, more preferably about 50 percent to about 70 percent and most preferably about 60 percent of the surface area of the interior surface of the mold cavity.
- the core and/or intermediate layer forming material is introduced into the cavity using any known conventional molding methods such as injection or compression molding.
- the resulting construction i.e., the core or a core with an intermediate layer molded thereon
- This surface profile comprises a plurality of peaks having a height of about 2 to about 15 mils and a peak density of about 45 to about 75 percent .
- the construction is then removed from the mold and may proceed directly to the next manufacturing step without a need for any other surface preparation steps such as grinding, washing or drying.
- a particularly preferred pattern is one commercially available from Mold-Tech (Division of Roehlen Industries) as Pattern No. 11050, which comprises a random pattern of non-uniform depressions having a depth of about
- the presently claimed method may be employed to improve the interfacial adhesion between any of the abutting layers of a golf ball construction.
- the present method can be used to form conventional two-piece golf balls or multilayer golf balls comprising a cover, a core and at least one intermediate layer disposed between the cover and the core .
- a two-piece golf ball having a cover and a core may be formed by a compression molding process, wherein the core blend is introduced into a mold cavity having an interior surface that has been adapted to contain a finely textured pattern comprising a plurality of depressions having a depth of about 2 to 15 mils and a draft angle of less than about 10°.
- a core is formed having a corresponding finely textured surface profile comprising a plurality of peaks having a height of about 2 to 15 mils integrally formed in the outer surface thereof .
- the core is removed from the textured mold cavity, placed in a second mold cavity and subsequently a cover blend is applied around the textured core.
- the cover may be applied using any conventional technique such as i.nj.ecti.on moldi.ng, compressi.on moldi.ng or casting methods
- the finely textured surface profile of the core promotes adhesion between the core and the cover layer.
- a multilayer golf ball may also be formed by the present claimed method.
- the outer surface of each of the layers of the multilayer construction may have a finely textured surface profile comprising a plurality of peaks having a height of about 2 to 15 mils integrally molded therein.
- Each of the outer surfaces of the layers may have the same surface profile or different surface profiles. Alternatively, only selected layers of the construction may have a finely textured surface profile integrally molded therein.
- a golf ball core may be molded using a compression molding method.
- the core is then fixtured in a conventional mold cavity which contains a finely textured pattern on the interior surface of the cavity.
- An intermediate layer blend is subsequently introduced into the mold cavity to form an intermediate layer around the core wherein the outer surface of the intermediate layer contains a finely textured surface profile integrally molded therein.
- This construction is then directly placed into an additional mold cavity and a cover blend is injection molded around the construction to form a cover layer.
- the cavity for forming the core may comprise a finely textured pattern on the interior surface thereof so as to form a core having a corresponding finely textured surface profile.
- the textured core is then placed in a second mold cavity which also has a finely textured interior surface.
- An intermediate material blend is then introduced to the second cavity to form a construction having an intermediate layer with a finely textured surface profile on the outer surface thereof. This construction is then directly placed into an additional mold cavity and a cover blend is injection molded around the construction to form a cover layer.
- a golf ball of the present invention is formed comprising a cover, a core and an intermediate layer interposed between the cover and the core, wherein the intermediate layer has a finely textured pattern integrally formed in its outer surface.
- a core is formed by molding a core blend composition using conventional compression molding techniques.
- the core blend composition comprises:
- the core is ground usi•ng a Glebar gri.nder to provi.de the proper outer diameter.
- the ground core is then washed, dried and placed in a retractable pin injection mold cavity which has had its internal surface modified to provide a finely textured pattern thereon.
- the internal surface of the mold cavity is modified to have a pattern commercially available from Mold-Tech (Division of Roehlen
- Pattern No. 11050 which comprises a random pattern of non-uniform depressions having a maximum depth of about 4.5 mils, a draft angle of about 6.5° and a depression density of about 60 percent.
- intermediate layer has a finely textured surface profile integrally molded therein, said profile comprising a plurality of peaks having a maximum height of about 4.5 mils, and a peak density of about 60 percent.
- the core/intermediate layer construction is then placed in a second injection mold cavity and a cover blend
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0015557A GB2347357A (en) | 1998-01-12 | 1999-01-11 | Method and apparatus for improving adhesion between golf ball layers |
AU22204/99A AU2220499A (en) | 1998-01-12 | 1999-01-11 | Method and apparatus for improving adhesion between golf ball layers |
JP2000527322A JP2003521263A (en) | 1998-01-12 | 1999-01-11 | Method and apparatus for improving adhesion between golf ball layers |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/005,906 | 1998-01-12 | ||
US09/005,906 US6103166A (en) | 1998-01-12 | 1998-01-12 | Method for improving adhesion between golf ball layers |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999034881A2 true WO1999034881A2 (en) | 1999-07-15 |
Family
ID=21718298
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1999/000566 WO1999034881A2 (en) | 1998-01-12 | 1999-01-11 | Method and apparatus for improving adhesion between golf ball layers |
Country Status (5)
Country | Link |
---|---|
US (2) | US6103166A (en) |
JP (1) | JP2003521263A (en) |
AU (1) | AU2220499A (en) |
GB (1) | GB2347357A (en) |
WO (1) | WO1999034881A2 (en) |
Cited By (1)
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EP2899008A1 (en) * | 2014-01-27 | 2015-07-29 | Bayer MaterialScience AG | Injection moulding method for the manufacture of a composite product with a structured surface in the contact area of the layers in order to improve adhesion |
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US8343406B2 (en) | 2011-04-18 | 2013-01-01 | Acushnet Company | Process for manufacturing golf balls having multi-layered covers |
EP2578372B1 (en) * | 2011-10-04 | 2014-03-19 | ETA SA Manufacture Horlogère Suisse | Method for optical functionalization of a transparent clock component |
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-
1998
- 1998-01-12 US US09/005,906 patent/US6103166A/en not_active Expired - Lifetime
-
1999
- 1999-01-11 JP JP2000527322A patent/JP2003521263A/en active Pending
- 1999-01-11 GB GB0015557A patent/GB2347357A/en not_active Withdrawn
- 1999-01-11 WO PCT/US1999/000566 patent/WO1999034881A2/en active Application Filing
- 1999-01-11 AU AU22204/99A patent/AU2220499A/en not_active Abandoned
- 1999-09-10 US US09/393,654 patent/US6342019B1/en not_active Expired - Fee Related
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EP2899008A1 (en) * | 2014-01-27 | 2015-07-29 | Bayer MaterialScience AG | Injection moulding method for the manufacture of a composite product with a structured surface in the contact area of the layers in order to improve adhesion |
Also Published As
Publication number | Publication date |
---|---|
US6103166A (en) | 2000-08-15 |
JP2003521263A (en) | 2003-07-15 |
US6342019B1 (en) | 2002-01-29 |
GB0015557D0 (en) | 2000-08-16 |
AU2220499A (en) | 1999-07-26 |
GB2347357A (en) | 2000-09-06 |
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