WO2007119478A1 - Feuille composite présentant d'excellentes propriétés de manipulation à l'état humide et balle DE JEU - Google Patents

Feuille composite présentant d'excellentes propriétés de manipulation à l'état humide et balle DE JEU Download PDF

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Publication number
WO2007119478A1
WO2007119478A1 PCT/JP2007/055852 JP2007055852W WO2007119478A1 WO 2007119478 A1 WO2007119478 A1 WO 2007119478A1 JP 2007055852 W JP2007055852 W JP 2007055852W WO 2007119478 A1 WO2007119478 A1 WO 2007119478A1
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WO
WIPO (PCT)
Prior art keywords
composite sheet
microholes
coating layer
porous coating
fiber
Prior art date
Application number
PCT/JP2007/055852
Other languages
English (en)
Japanese (ja)
Inventor
Daisuke Tanaka
Tetsuya Ashida
Original Assignee
Kuraray Co., Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kuraray Co., Ltd. filed Critical Kuraray Co., Ltd.
Priority to JP2008510839A priority Critical patent/JPWO2007119478A1/ja
Publication of WO2007119478A1 publication Critical patent/WO2007119478A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • 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

Definitions

  • the present invention is a composite sheet having excellent handling properties equivalent to those in a dry state even when the surface becomes wet due to sweat or other moisture, in particular, bare hands such as basketball, American football, handball, and rugby ball.
  • the present invention relates to a composite sheet suitable for manufacturing a ball, which is required for playing with good handling and gripping properties.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2004-300656
  • Patent Document 2 U.S. Pat.No. 6,024,661
  • Patent Document 3 Japanese Unexamined Patent Publication No. 2000-328465
  • Patent Document 4 International Publication No. 2005/097268 Pamphlet
  • Patent Document 5 International Publication No. 2005/097268 Pamphlet
  • the present invention Compared to various conventional sheet materials, the present invention has an excellent balance between grip properties and absorbability of moisture such as sweat and rainwater, and has excellent handling properties not only in a dry state but also in a wet state.
  • the purpose is to provide materials. It is another object of the present invention to provide a sheet material having both surface strength and dirt resistance suitable as a surface material for balls, particularly basketball, American football, handball, volleyball, and rugby ball.
  • the present invention comprises a fibrous substrate and a porous coating layer laminated on the fibrous substrate, and a plurality of recesses are formed discontinuously on the surface of the porous coating layer. Relates to a composite sheet with multiple microholes. Furthermore, the present invention relates to a game ball having a surface formed by the composite sheet.
  • FIG. 1 is a schematic cross-sectional view of a recess showing the basic structure of the recess of the present invention.
  • any conventionally known materials such as woven fabrics, knitted fabrics, nonwoven fabrics, or composite fabrics in which two or more of them are laminated and integrated by entanglement or adhesion can be used. is there.
  • woven fabrics, knitted fabrics, non-woven fabrics, composite fabrics, and the like that preferably have an ultrafine fiber strength can be used.
  • Composite sheet wind In order to improve the adhesion to the coating layer and the like, the polymer elastic body may be impregnated as necessary.
  • an entangled nonwoven fabric made of ultrafine fibers impregnated in a polymer elastic body force S sponge state or in a discontinuous state is preferable.
  • the surface of the game ball formed of such an entangled nonwoven fabric has good cushioning properties and good resilience of the game ball.
  • the fiber constituting the fibrous base is a synthetic fiber of a polymer such as polyester, polyamide or aramid, a composite fiber composed of these polymers, natural fibers such as cotton, silk, wool, or rayon. Any fiber can be used as long as it is a fiber that can be made into yarn or entangled, such as recycled fiber, semi-synthetic fiber such as acetate.
  • ultrafine fibers having an average fineness of preferably 0.3 dtex or less, more preferably 0.0001 to 0.1 ldtex are used. Examples of a method for obtaining such ultrafine fibers include a method of directly spinning ultrafine fibers and a method of transforming into ultrafine fibers.
  • At least one polymer component is extracted or removed from an ultrafine fiber-forming fiber obtained by composite spinning or mixed spinning of two or more types of thermoplastic polymers that are incompatible with each other, and ultrafine.
  • an ultrafine fiber-forming fiber obtained by composite spinning or mixed spinning of two or more types of thermoplastic polymers that are incompatible with each other, and ultrafine.
  • a method of transforming into fibers, or a method of transforming into ultrafine fibers by separating and peeling ultrafine fiber-forming fibers at the interface between the constituent polymers is common.
  • the ultrafine fiber-forming fiber from which at least one component is removed include core-sheath fiber, sea-island fiber, and multilayer laminated fiber.
  • the sea component polymer is extracted, and in the case of multilayer laminated type fibers, at least one of the laminating component polymers is extracted and removed or decomposed to remove ultrafine fibers or ultrafine fiber bundles comprising the remaining polymer components Is obtained.
  • exfoliated split type ultrafine fiber-forming fibers include petal-like laminated fibers and multi-layer laminated fibers, which are separated from each other at the interface between different polymers to be laminated by physical treatment or chemical treatment. By doing so, an ultrafine fiber or an ultrafine fiber bundle is obtained.
  • the island component polymer of sea-island fiber is a polymer that can be melt-spun and has good fiber properties such as strength, and has a higher melt viscosity and surface tension than the sea-component polymer under spinning conditions.
  • Larger polymers are preferred.
  • polyamide polymers such as nylon 6, nylon 66, nylon 610, nylon 612, and copolymers based on these, or Polyester polymers such as polyethylene terephthalate, polypropylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, and copolymers mainly composed thereof are preferably used.
  • a sea component polymer a polymer having a lower melt viscosity than an island component polymer, a polymer having low compatibility with an island component, which is more soluble in a solvent and more decomposable with a decomposing agent than an island component polymer.
  • a polymer having a lower melt viscosity than an island component polymer a polymer having low compatibility with an island component, which is more soluble in a solvent and more decomposable with a decomposing agent than an island component polymer.
  • polyethylene, modified polyethylene, polypropylene, polystyrene, modified polystyrene, modified polyester, and thermoplastic polyvinyl alcohol are preferably used.
  • Ultrafine fiber-forming fibers suitable for generating ultrafine fibers with an average fineness of 0.3 dtex or less that is, the volume ratio of sea component polymer to island component polymer (sea component / island component) of sea island type fiber is 10Z90 ⁇ It is preferably 70Z30. If the sea component is 10% or more, the amount of the sea component to be dissolved or decomposed and removed is appropriate, so the resulting fibrous base has sufficient flexibility and avoids excessive use of treatment agents such as softeners. Can be preferable. The use of an excessive amount of the treatment agent often reduces mechanical properties such as tear strength of a fibrous base material mainly composed of entangled nonwoven fabric composed of ultrafine fiber bundles.
  • the entangled nonwoven fabric suitable as the fibrous base material is not particularly limited as long as it is a method capable of obtaining a weight, denseness, and a stable shape suitable for the intended use, and is manufactured by a conventionally known method.
  • the power to build is S.
  • the above-described fibers, which are either short fibers or long fibers, are used to form a web by a conventionally known method such as a card method, a paper making method, a spun bond method, or a combination thereof.
  • the web is entangled by a conventionally known method such as a needle punch method or a spunlace method, or a combination thereof.
  • a fibrous substrate by the following method. Obtained by spinning The fiber is stretched about 1.5 to 5 times, then crimped with a machine, and cut to a length of about 3 to 7 cm to obtain a short fiber. This short fiber is defibrated with a card, and a web having a desired density and weight is formed through a webber. The obtained webs are stacked as necessary to form a stack of desired weight and combination. By piercing this stack with a needle having one or more barbs at a density of about 300 to 4000 punches Zcm 2, an entangled nonwoven fabric in which fibers are entangled in the thickness direction is obtained. It is done.
  • fibers obtained by spinning are continuously collected on a collection surface such as a net to form a web having a desired density and weight composed of long fibers, and this web is treated in the same manner as described above. By doing this, it is possible to manufacture an intertwined nonwoven fabric.
  • the obtained entangled nonwoven fabric may be hot-pressed in the thickness direction, if necessary.
  • the press is a conventionally known method such as a method of passing an entangled nonwoven fabric between a plurality of rolls including a calorie heat roll, a method of passing an entangled nonwoven fabric preheated by a dryer or a heating roll between a plurality of rolls including a cooling roll, etc. Can be done by the method.
  • sea-island fiber using a low melt viscosity polymer such as polyethylene as a sea component
  • the sea component is melted by hot pressing, and the adjacent sea-island fibers are pressure-bonded to each other, thereby achieving the above object.
  • a fixing agent that can be removed in this step or a small amount of a fixing agent that cannot be removed may be applied within a range that does not impair the effects of the invention.
  • a fibrous base material is obtained by applying a polymer elastic body solution or dispersion to an entangled nonwoven fabric by a method such as impregnation or coating, and solidifying it into a sponge shape or a dot (non-continuous) shape. It is done.
  • a polymer elastic body any of those conventionally used in the production of strong fibrous substrates can be used.
  • a polyurethane resin, a polychlorinated bur resin, a poly acrylate resin, a polyamino acid resin, a silicone resin (all including a copolymer), and a mixture thereof are suitable.
  • polyurethane resin is most preferable because a fibrous substrate excellent in the balance between sensibility such as texture and feel and physical properties such as mechanical properties and durability can be obtained.
  • the entangled nonwoven fabric is impregnated with an aqueous dispersion of an elastic polymer or an organic solvent solution, and then coagulated by a method such as thermal coagulation, dry coagulation, or wet coagulation.
  • the amount of the polymer elastic body applied is preferably 1 to 150% by mass as a solid content with respect to the entangled nonwoven fabric.
  • the mechanical properties of the fibrous base material and the adhesion to the porous coating layer are at a sufficient level, and the feel of the fibrous base material can be prevented from becoming rubber-like.
  • the amount of the polymer elastic body is a ratio to the mass after the ultrafine fibers are formed.
  • the fiber or yarn is modified before or after the polymer elastic body is applied.
  • the modification is carried out by treating the modifiable fiber or yarn with a solvent that is insoluble or poorly soluble in the polymer elastic body, or with a degrading agent that is non-degradable or weakly degradable.
  • a fibrous substrate composed of an entangled nonwoven fabric made of ultrafine fibers and a polymer elastic body is obtained.
  • the thickness of the fibrous substrate can be arbitrarily selected according to the final use of the composite sheet, and is not particularly limited, but is generally 0.3 to 3 mm. Considering the balance between the texture and physical properties of the composite sheet and the ease of production, 0.5 to 2.5 mm is preferred. Considering selling game bonuses with a good balance between water absorption, handling and grip, 0.55 ⁇ : 1. 75mm.
  • a porous coating layer is laminated on the surface of a fibrous substrate.
  • a porous coating layer is formed on the surface of a fibrous substrate by a method in which an aqueous dispersion of an elastic polymer or an organic solvent solution is continuously applied to a fibrous substrate and then solidified and dried by a dry method or a wet method.
  • the application can be performed using a knife, bar, roll, or the like.
  • the coating amount is controlled by adjusting the clearance between the surface of the fibrous substrate and the knife, bar, roll, etc. Apply an aqueous dispersion of polymer elastic material.
  • the porous coating layer is generally laminated by continuously coagulating and drying by a dry method using an additive such as a foaming agent.
  • an organic solvent solution of a polymer elastic body is applied, a coagulating liquid containing a poor solvent for the polymer elastic body is applied, or the polymer elastic body is coagulated in a porous state by a wet method immersed in the coagulating liquid.
  • the porous film layer is generally laminated by washing with water and drying.
  • the porous coating layer may be laminated on the surface of the fibrous base by another method. For example, a predetermined amount of an aqueous dispersion or organic solvent solution of a polymer elastic body is applied to a transfer release sheet such as a film or a release paper, and the polymer elastic body is solidified into a porous state by the same method as described above, and then The porous coating layer can also be laminated by a method of drying to obtain a porous film and bonding the porous film onto a fibrous substrate.
  • the porous film may be adhered to the fibrous substrate through an adhesive, or a treatment solution containing a solvent capable of dissolving the polymer elastic body may be applied to the film to apply the polymer elasticity on the film surface.
  • the body may be redissolved and glued through. After bonding, the transfer release sheet is peeled off to obtain a fibrous substrate on which a porous coating layer is laminated. Similarly, after applying a predetermined amount of an aqueous dispersion of an elastic polymer or an organic solvent solution to a transfer release sheet, it is bonded to a fibrous substrate before or during solidification, and simultaneously with solidification, a porous coating layer is formed. Can also be bonded to the fiber substrate.
  • the polymer elastic body for laminating the porous coating layer can be selected from those exemplified as the polymer elastic body to be contained in the entangled nonwoven fabric. From the viewpoint of balance of elasticity, softness, abrasion resistance, ability to form a porous structure, etc., polyurethane resin is preferably used as in the case of entangled nonwoven fabric.
  • the polyurethane resin impregnated in the entangled nonwoven fabric and the polyurethane resin constituting the porous coating layer are preferably the same.
  • One or more additives such as a colorant, a light-resistant agent, and a dispersant are added to the aqueous dispersion or organic solvent solution of the polymer elastic body for laminating the porous coating layer depending on the purpose. Also good. That As other additives, a foaming agent for controlling the shape of the porous structure by dry foaming, a coagulation modifier for wet coagulation, etc. may be added alone or in combination of several kinds as necessary.
  • a polyurethane resin is used as the polymer elastic body
  • an organic solvent solution of the polymer elastic body is applied on the fibrous substrate, and then immersed in a coagulation bath containing a poor solvent for the polyurethane resin.
  • the polyurethane resin can be solidified into a porous state.
  • Water is preferably used as the poor solvent for the polyurethane resin.
  • a mixture of poor solvent, water and a good solvent of polyurethane resin such as dimethylformamide (DMF) is used as the coagulation bath
  • the coagulation state of the polyurethane resin that is, the porous structure
  • the thickness of the porous coating layer is preferably 50 to 500 ⁇ m.
  • a concave portion is formed on the surface of the porous coating layer in order to improve handling properties.
  • the concave portion may be formed by any conventionally known method.
  • it can be formed using an embossing roll having a convex pattern, a flat plate embossing or a release paper.
  • the height of the convex part on the release paper is practically about 200 to 300 / m, and if the height is close to the limit, Insufficient sharpness. Force that can solve this problem by pressing from the back side of the release paper Large pressure is required and the texture tends to become harder.
  • a method using an embossing roll having a convex pattern has a depth within the above range, and is easy to form a concave portion.
  • the shape of the recess is not particularly limited as long as it is discontinuous.
  • the polygonal shape, the linear shape, the lattice shape, the cylindrical shape, and the dimple shape are preferable in terms of excellent grip properties
  • a dimpled shape is particularly preferable in terms of excellent cushioning properties, impact on fingertips, and wear resistance.
  • the “recess depth” as used in the present invention is the distance D between the portion where the recess starts (recess contour 1) and the deepest portion 2 inside the recess, as shown in FIG. It is expressed as the average of the measured values of 10 recesses.
  • the depth of the recess is preferably 100 to 500 zm, and the longest diameter of the recess opening is preferably 1 to 5 mm, more preferably 2 to 4 mm. Opening area of the recess is 3 to 3
  • the presence of microholes in the recesses is important in that the grip performance, particularly the wet grip properties, is excellent.
  • the microholes are present mainly in the vicinity of the contour 3 of the concave portion (50% or more of the microholes) because the game ball has particularly excellent grip properties when dry and wet and has good surface properties.
  • the contour of the concave portion means a portion that defines the outer periphery of the concave portion, and a point where the concave portion starts to be depressed in the cross section of the composite sheet observed with an electron microscope or the like.
  • the concave-contour vicinity portion 3 refers to the inner surface of the concave portion in the portion from the concave contour 1 to the depth of D / 4.
  • the average diameter of the microholes is 5 to 100 ⁇ m, which is preferably 20 to 70 111 in terms of having both grip properties and surface physical properties.
  • the average number of micro holes is preferably 100 to 4000 per lmm 2 of the inner surface of the recess, more preferably 500 to 3000, and more preferably force S, and 1000 to 3000 when wet is highly absorbent. It is more preferable because of its excellent grip.
  • the depth of the microholes may reach the fibrous substrate through a porous coating layer that is not particularly limited. In order to obtain practically sufficient water absorbency and sweat absorbency, it is particularly preferable to reach a fiber substrate where the depth of the microhole is preferably 10 ⁇ or more. .
  • the method for forming the microhole in the recess is not particularly limited.
  • an embossing roll in which convex portions having microprotrusions for forming microholes are used to simultaneously form the concave portions and the microholes.
  • the porous coating layer before embossing is preferably at least a porous coating layer that has a longitudinal sponge structure in a cross section parallel to the thickness direction at least 5 ⁇ m below the surface of the porous coating layer. It is more preferable that a vertically long sponge structure exists in the range from the surface of the layer to 2 xm below because microholes are easily formed in the recesses by embossing.
  • Such a porous coating layer is obtained by, for example, immersing and solidifying a DMF solution having a polyurethane concentration (solid content) of 10 to 30% by mass in a coagulating aqueous solution having a DMF concentration of 0 to 35%. can get.
  • the embossing conditions are appropriately selected depending on the properties of the resin constituting the porous coating layer, the porous structure, the height of the protrusions of the embossing roll, and the like.
  • the porous coating layer is polyurethane
  • the embossing roll temperature is 140 to 180 ° C
  • the press pressure is 5 to 50 kg / cm 2
  • the treatment time is 10 to 120.
  • a concave portion having a microhole is formed by embossing under the condition of seconds.
  • the embossing roll temperature is 160 to 180 in order to make the microholes exist substantially only in the vicinity of the contour (more than 50% of the microholes).
  • C preferably embossed under conditions of 15 to 35 kgZcm 2 and press time of 30 to 90 seconds. If the embossing conditions are too weak, it is difficult to form recesses that satisfy the above requirements, and microholes are also difficult to form. On the other hand, if the embossing condition is too strong, cracks penetrating the porous coating layer tend to occur.
  • the distance between each recess and the recess is preferably 1.0 to 5. Omm, and more preferably 1.5 to 3. Omm. Within the above range, it is possible to avoid a decrease in surface strength and a decrease in grip properties due to a deterioration in water absorption.
  • microholes may be formed between the recesses on the surface of the porous coating layer (a plane where no recesses are formed) as long as the effects of the present invention are not impaired.
  • non-porous resin resins that improve grip properties such as latex rubber and styrene isoprene block copolymers and known resins that improve surface properties are preferably used.
  • the application method is not limited, but gravure application is preferable in that it can be selectively applied to the surface of the porous coating layer other than the concave portion.
  • the thickness of the composite sheet obtained as described above is preferably 0.8 to 2.3 mm.
  • the composite seat of the present invention is a game ball that is directly touched by hands such as volleyball, basketball, handball, rugby ball, American football, a grip tape for various rackets such as a tennis racket, a badminton racket, a vehicle handle, a suspended leather. It can be suitably used for grip materials represented by surface covers such as handrails for stairs.
  • the surface of the concave portion of the composite sheet was photographed with an electron microscope, and 10 arbitrary concave portions were selected on the surface photograph.
  • the number of microholes present in each of the 10 recesses was counted.
  • the average value of numerical values obtained by dividing the number of each microhole by the area of each recess was determined.
  • Evaluation criteria for wet handling A When the ball is used with a sweaty hand, the hand and the ball do not slip and have sufficient grip.
  • the obtained fiber was drawn, crimped, and cut to obtain a staple having 3.5 dtex and a cut length of 51 mm.
  • a stacked web was produced by a cross wrapper method.
  • an entangled nonwoven fabric with a basis weight of 450 g / m 2 was obtained by needle punching with a needle penetration density of 980 punches / cm 2 using a 1-perb felt needle.
  • the entangled nonwoven fabric was dried by heating, pressed to smooth the surface, impregnated with 16% polyether-based polyurethane DMF solution, and coagulated in a 20% DMF aqueous solution. After washing with hot water, the polyethylene in the fiber was extracted and removed with hot toluene to obtain a fibrous substrate composed of 6-nylon ultrafine fibers and porous polyurethane.
  • a recess having microholes was formed by embossing at a roll temperature of 160 ° C., a press pressure of 30 kg / cm 2 , and a processing time of 50 seconds.
  • the thickness of the obtained composite sheet was 1.5 mm.
  • the color between the recesses was also clear, and there was an average of about 3000 microhole forces with an average diameter of 53 ⁇ m per lmm 2 inside the recess in the vicinity of the contour of the recess. Some microholes communicated with the fibrous substrate.
  • Recessed The depth was 400 / im.
  • the wear loss was 80 mg, and there was almost no change in the surface after the wear test.
  • a composite sheet was produced in the same manner as in Example 1 except that the polyurethane solution was not applied between the recesses. Average of about 2800 microholes force concave portion surface lmm 2 per average diameter 50 xm to contour the vicinity of the recess was present. Some microholes communicated with the fibrous base material. The presence of microholes was also confirmed in the flat part between the recesses. The depth of the recess was 400 / im. The wear loss was 102 mg, and there was almost no change in the surface after the wear test.
  • recessed portions were formed by embossing with a pressing pressure of 35 kgZcm 2 and a processing time of 90 seconds. Apply a polyether polyurethane solution containing a red pigment (solid content 10%) between the recesses using a 150 mesh gravure roll. Plate, lg / m 2 ) in terms of solid content, to obtain a composite sheet.
  • the resultant composite sheet had a force without microholes in the recesses.
  • the depth of the recess is 400
  • the resulting composite sheet has a clear rugged pattern, the average surface area of the protrusions is 2.7 mm 2 , the average diameter is 10 xm, the average interval is about 20 zm, and the microholes are at the top of the protrusion surface. Only about 70 pieces / mm 2 were present. Some microholes communicated with the fibrous substrate. The average height difference between the concave and convex portions was 400 m.
  • embossing was performed under the conditions of a roll temperature of 160 ° C, a press pressure of 30 kgZcm 2 , and a processing time of 50 seconds to form convex portions on the surface of the porous skin layer.
  • a polyether-based polyurethane solution (solid content 10%) containing a red pigment was applied using a 150 mesh gravure roll (amount applied: 1 step, lg / m 2 in solid content), and composite sheet Got.
  • the average height difference between the concave and convex portions was 400 zm. However, there were no micro holes anywhere in the recess.
  • the weight loss of this composite sheet was 92 mg. After the wear test, the surface showed almost no change.
  • the handling of basketballs made using this composite sheet was evaluated, the handling when dry was rated B and the handling when wet was rated C, both of which were low.
  • the composite sheet of the present invention satisfies the surface physical properties required for a game ball by the discontinuous recesses formed on the surface and the microholes formed in the recesses, and can be used in a dry state and a wet state.
  • the difference in handling is unprecedented.
  • game equipment such as game balls that may sweat on the surface due to handling with bare hands, and game boards where rain water or other moisture may adhere to the surface for use in outdoor games.
  • game equipment such as a game machine, it is desired that there is little change in surface grip in a wet state.
  • the present invention has an excellent effect in such applications.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Golf Clubs (AREA)
  • Laminated Bodies (AREA)
  • Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)

Abstract

L'invention concerne une feuille composite comprenant un substrat fibreux et une couche de film de revêtement poreuse laminée sur le substrat fibreux. La couche de film de revêtement poreuse comporte de multiples parties concaves formées de façon discontinue sur sa surface, chacune des parties concaves comportant de multiples trous micrométriques. Les parties concaves avec leurs trous micrométriques permettent à la feuille composite de présenter d'excellentes propriétés de manipulation à l'état humide, comparables à celles à l'état sec.
PCT/JP2007/055852 2006-03-27 2007-03-22 Feuille composite présentant d'excellentes propriétés de manipulation à l'état humide et balle DE JEU WO2007119478A1 (fr)

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JP2008510839A JPWO2007119478A1 (ja) 2006-03-27 2007-03-22 ウェット状態でのハンドリング性に優れた複合シートおよびゲームボール

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JP2006-084555 2006-03-27
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019169336A (ja) * 2018-03-23 2019-10-03 旭化成株式会社 微細パタンを有する多孔質フィルム

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000328465A (ja) * 1999-05-12 2000-11-28 Kuraray Co Ltd ボール用皮革様シート
JP2004277961A (ja) * 2003-03-18 2004-10-07 Teijin Cordley Ltd ボール用表皮材及びその製造方法
JP2004300656A (ja) * 2003-03-19 2004-10-28 Kuraray Co Ltd ボール用皮革様シート

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000328465A (ja) * 1999-05-12 2000-11-28 Kuraray Co Ltd ボール用皮革様シート
JP2004277961A (ja) * 2003-03-18 2004-10-07 Teijin Cordley Ltd ボール用表皮材及びその製造方法
JP2004300656A (ja) * 2003-03-19 2004-10-28 Kuraray Co Ltd ボール用皮革様シート

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019169336A (ja) * 2018-03-23 2019-10-03 旭化成株式会社 微細パタンを有する多孔質フィルム
JP7231334B2 (ja) 2018-03-23 2023-03-01 旭化成株式会社 微細パタンを有する多孔質フィルム

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