WO2007138931A1 - 人工皮革用基材および銀付調人工皮革 - Google Patents
人工皮革用基材および銀付調人工皮革 Download PDFInfo
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- WO2007138931A1 WO2007138931A1 PCT/JP2007/060444 JP2007060444W WO2007138931A1 WO 2007138931 A1 WO2007138931 A1 WO 2007138931A1 JP 2007060444 W JP2007060444 W JP 2007060444W WO 2007138931 A1 WO2007138931 A1 WO 2007138931A1
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- artificial leather
- base material
- fiber
- silver
- nonwoven fabric
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Classifications
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- 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
- D06N3/04—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06N3/06—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds with polyvinylchloride or its copolymerisation products
- D06N3/08—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds with polyvinylchloride or its copolymerisation products with a finishing layer consisting of polyacrylates, polyamides or polyurethanes or polyester
-
- 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
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0004—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using ultra-fine two-component fibres, e.g. island/sea, or ultra-fine one component fibres (< 1 denier)
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/016—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the fineness
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/018—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the shape
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/12—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with filaments or yarns secured together by chemical or thermo-activatable bonding agents, e.g. adhesives, applied or incorporated in liquid or solid form
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- 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
- D06N3/007—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by mechanical or physical treatments
- D06N3/0077—Embossing; Pressing of the surface; Tumbling and crumbling; Cracking; Cooling; Heating, e.g. mirror finish
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- 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
- D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
- D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/608—Including strand or fiber material which is of specific structural definition
- Y10T442/614—Strand or fiber material specified as having microdimensions [i.e., microfiber]
Definitions
- the present invention relates to a base material for artificial leather, in which a polymer elastic body is contained in a non-woven fabric composed of ultrafine fiber bundles. Specifically, it is related to artificial leather with silver tone that has high peel strength required for sports shoe applications, no rebound! /, Soft texture and waisty texture, and has a fine bend. is there.
- artificial leather has been recognized by consumers for features such as lightness and ease of handling, and has been widely used in clothing, general materials, sports fields and the like.
- Such artificial leather is required to satisfy all of the sensibility aspects such as appearance and texture and physical properties such as dimensional stability.
- a method in which one component in an ultrafine fiber generating fiber is removed to make the fiber ultrafine is generally used.
- a conventional method for producing artificial leather including an ultrafine process is roughly as follows. That is, (1) staple fibers of two types of polymer fibers having different solubility properties, (2) web formation using a card, a cross wrapper, a random weber, etc.
- a method of removing the removal component from the multicomponent fiber is employed.
- caustic soda is used to remove polyester
- formic acid is used to remove polyamide
- trichlorethylene and toluene are used to remove polystyrene and polyethylene.
- Polybuty alcohol known as a water-soluble polymer can change the degree of water-solubility by changing its basic skeleton, molecular structure, form, and various modifications, It is also possible to make it thermoplastic, that is, melt-spinnable. PVA has also been confirmed to be biodegradable. At present, the major challenge is how to harmonize artificially synthesized chemicals with the natural world and protect the global environment. PVA-based rosin is attracting much attention.
- a leather-like sheet obtained by combining or applying a polyurethane solution to the same substrate and wet coagulating it again, followed by gravure roll coating with a polyurethane resin colored paint; After impregnating polyurethane non-woven fabric with polyurethane resin and wet coagulating, sea components of sea-island fibers are eluted and removed with a solvent or the like to form an ultrafine fiber bundle of 0.2 denier or less, and a base material comprising the ultrafine fiber bundle is formed.
- Patent Document 3 describes that long fibers are entangled by needle punching. In this case, it is described that the strain generated by the long fiber entanglement process can be eliminated by making the cut ends of 5 to 100 Zmm 2 fibers on the nonwoven fabric surface positively. Talk to you. In an arbitrary cross section parallel to the thickness direction of the long-fiber nonwoven fabric, there are 5 to 70 fiber bundles per lcm width (that is, the number of fibers oriented in the thickness direction by the needle punch is equal to the width lcm of the cross section). Equivalent to 5 to 70 per unit).
- the total area occupied by the fiber bundle is 5 to 70% of the cross-sectional area in an arbitrary cross-section orthogonal to the thickness direction of the long-fiber nonwoven fabric.
- the advantage of the long fiber that is, the contribution to the strong physical properties of the nonwoven fabric due to the continuity of the fiber is reduced, and it is difficult to make full use of the characteristics of the long fiber.
- a base material for artificial leather having a natural leather-like flexibility can be obtained by impregnating an entangled nonwoven fabric composed of ultrafine fiber-generating fibers or ultrafine fiber bundles with a binder resin and wet coagulating it. It has been.
- a binder resin made of water-based emulsion is present at a high concentration on the surface of the artificial leather substrate, the adhesion of the surface layer (silver surface layer) to the surface is hindered, and the silver coating having high peel strength is achieved. Manufacture of artificial leather was difficult.
- Patent Document 4 when an entangled nonwoven fabric made of ultrafine fiber bundles is impregnated with a water-based emulsion of binder resin, then hot air is blown only on one side and dried, the binder resin is mainly sprayed with hot air. Migrate to one side and migrate to the other side It is disclosed that it can be prevented. However, just by preventing migration, there is some water-based emulsion of binder resin on the other side, so the binder layer is attached to the surface layer and the base for artificial leather is made of fine fibers. I could't get the material.
- Patent Document 1 Japanese Patent Publication No. 63-5518 (pages 2 to 4)
- Patent Document 2 JP-A-4 185777 (2-3 pages)
- Patent Document 3 JP 2000-273769 A (pages 3 to 5)
- Patent Document 4 JP 54-59499 A (1-2 pages)
- An object of the present invention is to provide a silver-tone artificial leather having both a high peel strength required for sports shoe applications, a softness without repulsion and a texture with a waist, and a dense folded heel, and an object of the present invention is to provide a base material for artificial leather capable of producing such a silver-tone artificial leather.
- the present invention is a base material for artificial leather comprising an entangled nonwoven fabric formed from ultrafine fibers and a binder resin, and at least one surface of the base material for artificial leather is substantially binder binder resin.
- a base material for artificial leather characterized in that it is a dense layer formed of ultrafine fibers not attached to the base material, and the binder resin is impregnated in a portion other than the dense layer of the base material for artificial leather About.
- the present invention also relates to a silver-tone artificial leather comprising the artificial leather base material and a silver surface layer made of a polymer elastic body formed on a dense layer on the surface of the artificial leather base material. Furthermore, this invention relates to the method for manufacturing the said base material for artificial leather and the said silver-finished artificial leather.
- the ultrafine fibers constituting the base material for artificial leather of the present invention are multicomponent fibers (ultrafine fiber generating fibers) consisting of at least two types of spinnable polymer fibers having different chemical or physical properties.
- the ultrafine fiber generating fiber include composite fibers such as sea-island cross-section fibers, multilayer laminated cross-section fibers, and radiation laminated cross-section fibers manufactured by a chip blend (mixed spinning) method, a composite spinning method, and the like.
- the sea-island cross-section fiber is preferred in that it has less fiber damage at the time of a dollar punch and the fineness of the ultrafine fiber is uniform.
- the island component polymer of the sea-island type cross-sectional fiber is not particularly limited, but is polyester such as polyethylene terephthalate (PET), polytrimethylene terephthalate (PTT), polybutylene terephthalate (PBT), polyester elastomer, etc.
- a fiber-forming polymer such as polyamide resin such as resin, nylon 6, nylon 66, nylon 610, nylon 12, aromatic polyamide, polyamide elastomer, and the like, polyurethane resin, polyolefin resin and the like is preferable.
- polyester-based resins such as PET, PTT, and cocoon are easy to heat shrink, and the final product feel and practical performance are particularly preferable.
- the melting point of the island component polymer is preferably 160 ° C. or more, which is also preferable in terms of form stability and practicality.
- a fiber-forming crystalline rosin having a melting point of 180 to 2500C is more preferable.
- fusing point is mentioned later.
- Various stabilizers such as colorants such as dyes and pigments, UV absorbers, heat stabilizers, deodorants, and fungicides may be added to the island component polymer.
- the sea-component polymer of the sea-island type cross-sectional fiber is not particularly limited, but is different from the island-component polymer in solubility or decomposability, and has an affinity for the island component and is melted under the spinning conditions.
- Polymers having a viscosity less than that of the island component polymer or a surface tension less than that of the island component polymer are preferred.
- at least one selected polymer strength such as polyethylene, polypropylene, polystyrene, ethylene propylene copolymer, ethylene acetate butyl copolymer, styrene ethylene copolymer, styrene acryl copolymer, and polybulu alcohol alcohol.
- These polymers are used as sea component polymers. Considering the fact that it is possible to produce a base material for artificial leather without using chemicals, etc., and the spinning properties of the sea-island cross-section fibers, needle punch characteristics, environmental pollution, ease of dissolution and removal, etc. It is preferable to use a heat-resistant thermoplastic polyvinyl alcohol resin (PVA resin).
- PVA resin thermoplastic polyvinyl alcohol resin
- the viscosity average degree of polymerization (hereinafter simply referred to as the degree of polymerization (P)) of the PVA-based resin is preferably 200 to 500, more preferably 230 to 470, and even more preferably 250 to 450.
- Degree of polymerization 200 When it is as described above, it can be stably combined with an island component polymer having a moderately high melt viscosity. When the degree of polymerization is 500 or less, the melt viscosity is not too high and discharge from the spinning nozzle is easy.
- the so-called low polymerization degree PVA having a polymerization degree of 500 or less has a high dissolution rate in hot water.
- the degree of polymerization (P) is measured according to JIS-K6726. That is, it is obtained by the following equation from the intrinsic viscosity [7?] Measured in 30 ° C water after re-cleaning and purifying PVA-based resin.
- the saponification degree of the PVA-based ⁇ 90 to 99. 99 mole 0/0 force S Preferably, 93-99.
- Ri 98 mole 0/0 Gayo Preferably, from 94 to 99.97 Monore 0/0 force further preferably,! /, 96 to 99.96 Monore 0/0 force ⁇ particularly preferred.
- the chain strength is 90 mol% or more
- melt spinning can be performed without thermal decomposition or gelation with good thermal stability, and biodegradability is also good.
- a suitable sea-island type cross-section fiber can be obtained in which water solubility does not decrease even when it is modified with a copolymerization monomer described later.
- PVA with a saponification degree greater than 99.99 mol% is difficult to produce stably.
- the PVA-based resin used in the present invention is biodegradable and is decomposed into water and diacid carbon when it is treated with activated sludge or buried in soil.
- the activated sludge method is preferred for the treatment of PVA-containing waste liquid obtained by dissolving and removing PVA-based fats.
- the waste liquid containing PVA is continuously treated with activated sludge, it is decomposed in 2 days to 1 month.
- the PVA-based resin since PVA-based resin has a low combustion heat and a small load on the incinerator, the PVA-based resin can be incinerated by drying the PVA-containing waste liquid.
- the melting point (Tm) of PVA-based resin is 160 to 230 ° C force S, preferably 170 to 227 ° C, more preferably 175 to 224 ° C, and 180 to 220 ° C. Particularly preferred.
- the melting point is 160 ° C. or higher, the crystallinity is sufficient, good fiber strength is obtained, the thermal stability is good, and fiberization is easy.
- melt spinning can be performed at a low temperature, and the difference between the spinning temperature and the decomposition temperature of the PVA-based resin can be increased. can do.
- the melting point is measured by the method described later.
- the PVA-based resin is obtained mainly by curing a polymer composed of vinyl ester units.
- vinyl compound monomers for forming the bull ester unit include formate, acetate, propionate, valerate, force acrylate, vinyl laurate, stearate, benzoate, Examples thereof include vinyl bivalate and vinyl vinyl acetate, and vinyl acetate is preferred because the production of PVA resin is easy.
- the PVA-based resin may be a homopolymer or a modified PVA into which copolymer units are introduced, but a modified PVA is preferred from the viewpoint of melt spinnability, water solubility, and fiber properties.
- the comonomer may be an ethylene, propylene, 1-butene, isobutene or the like having 4 or less carbon atoms (X-olefins, methinolevinoreenotenole, ethino.
- ethers such as ether preferably both the content of polymerized units, of all structural units in the modified PVA 1 -20 mol% is preferred 4-15 mol% is more preferred 6-13 mol% is more preferred Ethylene-modified PVA is particularly preferred because the fiber properties are higher when the copolymerized unit is ethylene unit.
- the ethylene unit content is preferably 4 to 15 mol%, more preferably 6 to 13 mol%.
- the PVA-based resin is produced by a known method such as a bulk polymerization method, a solution polymerization method, a suspension polymerization method, or an emulsion polymerization method. If there is no solvent, a bulk polymerization method or a solution polymerization method in which polymerization is performed in a solvent such as alcohol is usually employed. Examples of the alcohol used as the solvent for the solution polymerization include lower alcohols such as methyl alcohol, ethyl alcohol, and propyl alcohol.
- Initiators include a, a'-azobisisobuty-tolyl, 2, 2'-azobis (2,4-dimethylvale-tolyl), benzoyl peroxide, n-propyl peroxy carbonate, etc.
- Well-known initiators such as an initiator or a peroxide-type initiator, are mentioned.
- the polymerization temperature is not particularly limited, but a range of 0 to 150 ° C is appropriate.
- the composite fiber containing the PVA-based resin as a removing component and the heat-shrinkable resin as an ultrafine fiber-forming component is bulky, it is difficult for the entangled nonwoven fabric to be coarsely cured without being damaged during one-punch punching. In addition, when a small amount of water is included, the PVA-based resin is somewhat plasticized. Turn into. When the composite fiber is shrunk by heat treatment in this state, the nonwoven fabric can be easily and stably densified.
- the densified non-woven fabric is impregnated with water-based emulsion of polymer elastic material at a low temperature so that the PVA-based resin does not dissolve in water, and then the PVA-based resin is dissolved and removed with water to make the composite fiber extremely fine.
- voids are created between the ultrafine fibers and the polymer elastic body, and the densification and softening of the base material for artificial leather are achieved at the same time.
- the artificial leather using the artificial leather base material obtained in this way is very similar to natural leather in terms of drape and texture.
- the content ratio of the sea component in the sea-island type cross-sectional fibers is preferably 5 to 70% by mass, more preferably 10 to 60% by mass, and still more preferably 15 to 50% by mass.
- the content is 5% by mass or more, the spinning stability of the composite fiber is good, the amount of the removal component is sufficient, and a sufficient amount of voids are formed between the ultrafine fiber and the polymer elastic body, This is preferable because an artificial leather having good flexibility can be obtained.
- the content ratio is 70% by mass or less, it is possible to avoid the inconvenience that a large amount of a polymer elastic body is required to stabilize the form of the artificial leather because the amount of the removed component is too large.
- Ultrafine fiber-generating fibers composite fibers such as sea-island type cross-section fibers obtained by spinning and drawing to the desired fineness were imparted with crimps in the same manner as in the production of conventional artificial leather substrates. Later, it may be cut into an arbitrary fiber length to form a staple, and the obtained staple may be formed into a fiber web using a card, a cross wrapper, a random weber or the like. However, in the present invention, it is preferable to form a long fiber web that is directly connected to melt spinning and does not need to make the ultrafine fiber generating fiber stable.
- a take-up speed of 1000 to 6000 mZ is used to achieve the desired fineness using a suction device such as an air jet nozzle.
- a suction device such as an air jet nozzle.
- Such a method for producing a long fiber web has a production advantage that a series of large-sized equipment such as a raw cotton feeding device, a fiber opening device, and a card machine, which are essential in the short fiber web production method, is not required.
- the obtained long fiber nonwoven fabric and the base material for artificial leather using the same are made of continuous high fiber long fiber fibers, the short fiber nonwoven fabric and its physical properties, which have been generally used in the past, are used.
- the basis weight of the long fiber web is preferably 20 to 500 gZm2.
- the fineness, fiber length, crimped state and the like need to be in a range suitable for devices such as a fiber opening device and a card machine.
- the fineness of ultrafine fiber-generating short fibers is limited to 2 decitex or more, and 3-6 decitex is generally adopted when considering stability.
- the fineness of ultra-fine fiber-generating long fibers is basically 0.5 decitex or higher, which is basically not limited by equipment, and even if the handling in the subsequent process is taken into consideration, 1 to 10 You can choose from a wide range of decitex.
- the average single fineness of the ultrafine fiber-producing long fibers is preferably 1 to 5 dtex from the viewpoints of physical properties and feel of the base material for artificial leather. Further, it is preferable to set the fineness, the cross-sectional shape, the content ratio of the removal component, etc. of the ultrafine fiber-generating fiber so that ultrafine fibers having an average single fineness of 0.0 003-0.5 dtex can be obtained.
- the number of islands is preferably 9 to L000.
- the fiber length is usually about 10 to 50 mm. If it is longer than the short fiber, 100 mm or more is preferable and it can be technically manufactured. It may be km or more.
- the long fiber web is subjected to an entanglement process such as a one-dollar punching process to obtain an entangled nonwoven fabric.
- Apparent density of the entangled nonwoven fabric is from 0.1 to 0. It is preferable 2gZcm a 3 instrument from 0.13 to 0. It is more preferable 2gZcm 3. Obtained in order to obtain the flexibility of natural leather Sheep-like, it is preferable to reduce as possible the apparent density of the entangled nonwoven fabric, if the apparent density is less than 0.
- the homogeneous nonwoven fabric structure is Therefore, it is difficult to obtain a base material for artificial leather that can provide the physical properties and texture required for artificial leather, which tends to have extremely large variations in physical properties in the area direction.
- the entangled nonwoven fabric is heat-treated to generate ultrafine fibers. It is also preferable to obtain a dense fiber entangled structure that cannot be obtained by entanglement treatment only by shrinking the area of the entangled nonwoven fabric using the shrinkage ability of the mold fiber. However, if the apparent density is less than 0.1 lg Zcm 3 , it is difficult to obtain a uniform and dense fiber entangled structure even if the area shrinkage rate by heat treatment is increased.
- the apparent density was calculated by calculating the mass per unit area by measuring the mass of the entangled nonwoven fabric cut out to a certain area, and applying a load of 0.7 gf per lcm 2 to the surface of the entangled nonwoven fabric. It can be calculated by dividing by the thickness measured in the state.
- the known condition force used can be selected. For example, a punching density of 1 to 9 per needle is preferred, and a punching density of 500 to 5000 punches Z cm 2 is preferred. From the standpoint of entanglement efficiency, it is preferable to punch so that the leading parb penetrates to the opposite side of the long fiber web.
- Various oil agents may be applied to the long fiber web before or during the entanglement process in order to prevent needle breakage, prevention of charging, and the like.
- the atmospheric temperature of the heat shrink treatment is 60 to 95 ° C, and the entangled nonwoven fabric can be made denser by sufficiently shrinking the ultrafine fiber generating fiber.
- the applied amount of water is 5% by mass or more, the plasticity of the sea component of the ultrafine fiber-generating fiber is sufficient, and the island component contracts sufficiently.
- the relative humidity is 75% or more, the applied water is prevented from drying and the sea component is hardened, and sufficient shrinkage can be obtained.
- the upper limit of the amount of water to be applied is not particularly limited, but 50% by mass of the total amount of PVA-based resin to prevent the dissolved PV A-based resin from contaminating the process and improving the drying efficiency. The following is preferred.
- the amount of water applied is the standard state (23 ° C , 65% RH) based on the total amount of PVA resin in the entangled nonwoven fabric after standing for 24 hours.
- Examples of methods for applying water include a method of spraying water on the entangled nonwoven fabric, a method of applying water vapor or mist-like water droplets to the entangled nonwoven fabric, and a method of applying water to the surface of the entangled nonwoven fabric.
- a method of applying water vapor or mist-like water droplets to the entangled nonwoven fabric is particularly preferred.
- the temperature of the water to be applied is preferably a temperature at which the PVA resin does not substantially dissolve.
- heat shrinkage treatment may be performed in an atmosphere with a relative humidity of 75% or more, or heat shrinkage treatment and water application may be performed simultaneously.
- the heat shrinking treatment is performed by leaving the entangled nonwoven fabric in the above atmosphere in a state where it is not as powerful as possible.
- the time required for the heat shrink treatment is 1 to 5 minutes from the viewpoint of productivity, and it is preferable because sufficient shrinkage can be imparted.
- the area shrinkage rate by heat shrink treatment is preferably 15% or more, more preferably 30% or more.
- the area shrinkage ratio is 15% or more, the apparent density of the entangled nonwoven fabric becomes sufficiently high and the shape retention is good.
- the handling and process passability in the manufacturing process (the process that the process is aimed at is successfully performed and the object to be processed is sent to the next process without inconvenience) is improved, and sufficient strength is achieved.
- a base material for artificial leather can be obtained.
- the shape retention is good, a large amount of polymer elastic body (binder resin) is not required, and the softness of natural leather-like waist can be obtained.
- the ultrafine fiber generating fiber shrinks with the removed component remaining, and an entangled nonwoven fabric having an apparent density of preferably 0.3 to 0.7 gZcm 3 is obtained.
- the area shrinkage rate is preferably about 60% or less.
- the moisture given for the heat shrink treatment remains and the removal component (PVA-based resin) is plasticized or melted.
- the removal component PVA-based resin
- the apparent density after hot pressing is 0.4 gZcm 3 or more, the surface is sufficiently smoothed, the apparent density is sufficiently high, and the shape retention is good. Therefore, the handleability and processability in the manufacturing process are improved, and a sufficiently strong artificial leather base material can be obtained.
- the shape retention since the shape retention is good, it does not require a large amount of polymer elastic body (binder resin), and can be soft and natural leather-like. wear. In the subsequent process, a sufficient amount of voids are formed between the ultrafine fibers and the polymer elastic body, and an artificial leather with good flexibility is obtained.
- the apparent density after hot pressing is 0.8 gZ cm 3 or less. Preferably there is.
- the entangled nonwoven fabric is impregnated with an aqueous emulsion solution of a polymer elastic body (binder resin) such as polyurethane to solidify the polymer elastic body.
- a polymer elastic body such as polyurethane
- the water-based emulsion solution of the polymer elastic body has a high concentration of the polymer elastic body on the surface of the base material for artificial leather that can be easily migrated to the surface of the entangled nonwoven fabric in the coagulation process and the drying process.
- the elastic polymer In order to improve water resistance after coagulation and drying, the elastic polymer generally has a crosslinked structure. Cross-linked polymer elastic bodies have poor adhesion.
- the polymer elastic body existing on the surface of the artificial leather base material has an adhesive property. There is a problem that the adhesive strength between the skin layer and the artificial leather substrate is insufficient.
- the present invention preferably, after adjusting the apparent density to a range of 0.4 to 0.8 g / cm 3 by hot pressing as described above, water is applied only to the surface of the entangled nonwoven fabric. Only the surface layer removal component (PVA-based resin) is plasticized or melted and heat-pressed in this state, and only water is applied, that is, only the surface layer of the entangled nonwoven fabric is densified or film Make it. As a result, even when the entangled nonwoven fabric is impregnated with the water-based emulsion liquid of the polymer elastic body, the densified surface layer portion prevents the water-based emulsion liquid from penetrating into the surface (migration), and the polymer elastic body.
- a substrate for artificial leather having a surface portion composed of a dense layer of ultrafine fibers can be obtained. Since the portion where the applied water has penetrated is densified or filmed, the thickness of the dense layer is the depth to which water penetrates. It depends on.
- Examples of methods for applying water for forming the dense layer include a method of spraying water on the surface, a method of applying water vapor or mist-like water droplets to the surface, and a method of applying water to the surface.
- the power that can be applied It is particularly preferable to apply water using a gravure coating method or spray method because a small amount of water can be applied uniformly!
- the thickness of the dense layer surface lm 2 per 5 of fault if nonwoven application amount of 1-10% is preferred instrument water of the total thickness of the artificial leather base material: by changing the range of LOOg Adjusted.
- the heat press temperature may be any temperature that can fix the contracted state of the PVA resin by evaporating the water plasticized from the PVA resin (for example, 110 to 130 ° C). There is no need for high temperatures to soften the fat.
- the dense layer obtained in this way needs to have sufficient denseness to prevent migration of the polymer elastic body to the surface of the artificial leather substrate.
- the apparent density of the dense layer is preferably 0.8 to: Lg / cm 3 .
- the entangled nonwoven fabric whose surface has been densified is impregnated with a water-based emulsion of a polymer elastic body (binder resin) and solidified.
- the amount of the polymer elastic body to be impregnated is more preferably 3 to 25% by mass, preferably 1 to 40% by mass in terms of solid content, based on the mass of the base material for artificial leather to be obtained. If it is within the above range, the ultrafine fibers are sufficiently fixed, the bending bend, the shape stability and the surface smoothness are good, the texture is cured, and the elastic property of the polymer elastic body appears strongly. The low-resilience flexibility of natural leather is obtained.
- polymer elastic body examples include, for example, polyvinyl chloride, polyamide, polyester, polyester ether copolymer, polyacrylate copolymer, polyurethane, neoprene, styrene butadiene copolymer, silicone resin, polyamino acid, polyamino acid Examples thereof include synthetic resins such as polyurethane copolymers, natural polymer resins, and mixtures thereof.
- the method for applying the water-based emulsion of the polymer elastic body is not particularly limited, and it can be applied by a conventionally known dipping method, spray method, coating method or the like.
- a method of applying a water-based emulsion to a surface opposite to the densified surface of the entangled nonwoven fabric and allowing it to penetrate is preferable in order to obtain a surface that does not contain a polymer elastic body.
- the applied polymer elastic body is 70 to: a dry method in which heat treatment is performed at LOO ° C or steam treatment at 100 to 200 ° C, or heat treatment is performed in a drying apparatus at 50 to 200 ° C.
- it is solidified by a dry method.
- the polymer elastic body concentration in the aqueous emulsion solution is preferably 3 to 40% by mass.
- the removal component (PVA-based resin) is extracted and removed from the ultrafine fiber generating fiber with water to form a fiber bundle of ultrafine fibers.
- the force there is no particular limitation to the force that can use a dyeing machine such as a liquid flow dyeing machine and jigger, and a scouring machine such as an open soaper.
- the efficiency varies greatly depending on the treatment method employed, the density of the nonwoven fabric, or the component ratio of the ultrafine fiber-generating fibers, etc., but it cannot be determined unconditionally, but the water temperature of the extraction bath is 80 to 95 ° C and the extraction time is 5 ⁇ 120 minutes are preferred.
- the removal time of most or all of the removed components is extracted for 5 to 30 minutes. It is also preferable that the power can be shortened.
- the average single fineness of the obtained ultrafine fibers is preferably 0.0003 to 0.5 dtex, more preferably 0.005 to 0.35 dtex, and even more preferably 0.001 to 0.2 dtex. . If the average single fineness is 0.0003 dtex or more, the nonwoven fabric structure can be prevented from being crushed and unnecessarily high density can be prevented, and a light and flexible base material for artificial leather can be obtained. If the average single fineness is 0.5 dtex or less, the base material for artificial leather has flexibility without rebound, This is preferred because it gives a silver-finished artificial leather with excellent surface smoothness and fineness of the folds. Since the richness and flexibility of natural leather can be obtained, the apparent density of the obtained base material for artificial leather is preferably 0.45 to 0.75 gZcm 3 and is preferably 0.50 to 0.65 gZcm 3 . Is more preferred.
- the surface layer (dense layer) surface is puffed with sandpaper, etc., so that the polymer elastic body (binder resin) adheres to the surface layer!
- a base material for artificial leather having a (dense layer) can be obtained.
- the surface of the artificial leather base material (dense layer) is bonded to the surface of the surface layer (dense layer) using, for example, a polymer elastic body film on release paper, dried, and if necessary, the crosslinking reaction is sufficiently performed Then, the peeled paper is peeled off to obtain the artificial leather with silver.
- the surface of the surface layer (dense layer) of the base material for artificial leather is substantially free of the polymer elastic body (the content of the polymer elastic body (binder resin) in the surface layer (dense layer) is 2% by mass or less ( (Including zero))), adhesive strength between the base material for artificial leather and the skin layer (silver surface layer) is good.
- the polymer elastic body for the skin layer, the thickness of the skin layer, the adhesive, the bonding method, the drying method, the conditions for the cross-linking reaction, etc. are the same as those used in the production of silver-finished artificial leather. Adopted.
- the elastic polymer constituting the silver layer is a polycarbonate-based polyurethane, because it has excellent flexibility, durability and peel strength, which are preferred for polyurethane in terms of improving the appearance quality such as buckling.
- a polyether-based polyurethane or at least one polymer elastic body that also has a silicone-modified polyurethane force is more preferable.
- the polymer elastic body constituting the adhesive (agent) layer is an ultrafine fiber or binder that forms the surface layer (dense layer) surface of the base material for artificial leather.
- a cross-linked (two-component) polyurethane that is preferably a polyurethane in terms of adhesion to a resin (a polymer elastic body forming a silver surface layer) is excellent in adhesion strength and texture. It ’s better than ⁇ .
- the silver-tone artificial leather of the present invention has high peel strength, softness without repulsion, and a texture with a waist, and has a fine folded heel, so shoes, heels, and baseballs. Suitable as a material for interiors such as gloves, belts, balls or sofas.
- Example [0049] Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to these examples. Further, parts and% described in the examples relate to mass unless otherwise specified. In addition, each measured value in an Example is
- the measured value is an average of 5 points.
- the density was calculated from the density of the resin forming the fiber and the cross-sectional area of the fiber from which the photographic power of the scanning electron microscope with a magnification of several hundred to several thousand times was also obtained.
- the temperature was raised to 00 ° C, cooled to room temperature, and the peak top temperature of the endothermic peak obtained when the temperature was raised again to 300 ° C at a rate of temperature increase of 10 ° CZ was taken as the melting point.
- a sample of 25cm in length and 2.5cm in width is pasted on a rubber plate of 2.5cm in width and 15cm in length. Combined. The average value of the stress when the rubber plate force was peeled at a speed of lOcmZ in the horizontal direction from the bonding surface was measured.
- a 100-liter pressurized reaction vessel equipped with a stirrer, nitrogen inlet, ethylene inlet and initiator addition port was charged with 29. Okg of acetic acid and 31. Okg of methanol, heated to 60 ° C and nitrogen publishing for 30 minutes. The reaction system was replaced with nitrogen. Next, ethylene was introduced so that the reactor pressure was 5.9 kgf / cm 2 . 2, 2′-Azobis (4-methoxy 2,4 dimethyl valero-tolyl) was dissolved in methanol to prepare an initiator solution having a concentration of 2.8 gZL, and nitrogen substitution was performed to perform nitrogen substitution.
- the saponification degree of the obtained ethylene-modified PVA was 98.4 mol%. Further, the modified PVA was incinerated and then dissolved in an acid, and the sodium content measured by an atomic absorption photometer was 0.03 parts by mass with respect to 100 parts by mass of the modified PVA. In addition, unreacted vinyl acetate after polymerization -After adding methanol solution of polyacetic acid bule obtained by removing monomer to n-hexane, precipitation and reprecipitation purification to dissolve in acetone are performed three times, followed by drying under reduced pressure at 80 ° C for 3 days for purification. Polyvinyl acetate was obtained. When the polyacetic acid butyl was dissolved in d6-DMSO and measured at 80 ° C. using 500 MHz proton NMR (JEOL GX-500), the ethylene unit content was 10 mol%.
- the NaOHZ acetic acid unit was 0.5 (molar ratio). After the gelled product was crushed and allowed to stand at 60 ° C for 5 hours, it was allowed to proceed with Ken-yaku, followed by extraction with methanol Soxhlet for 3 days, followed by 80 ° C And dried under reduced pressure for 3 days to obtain purified ethylene-modified PVA. When the average degree of polymerization of the purified modified PVA was measured according to JIS K6726 of the ordinary method, it was 330.
- the above water-soluble thermoplastic PVA (ethylene-modified PVA) is used as a sea component, polyethylene terephthalate with an isophthalic acid modification degree of 6 mol% is used as an island component, and the number of islands per ultrafine fiber generation fiber is 25.
- a sea component Z island component mass ratio of 30 Z70 was discharged at 260 ° C. The ejector pressure was adjusted so that the spinning speed was 4500 mZmin, and the long fibers were collected by a net to obtain a long fiber web having a basis weight of 30 gZm 2 made of ultrafine fiber generating fiber having an average fineness of 2.0 dtex.
- the overall nonwoven fabric apparent density of 0. 65 g / cm 3 A nonwoven fabric was obtained.
- the pressed surface was a glossy smooth surface, and as a result of observing the cross section with an electron microscope, a film layer having a thickness of about 50 m was observed on the pressed surface.
- one-part polyurethane resin solution (“NY324" (Dainippon Ink and Chemicals, Polycarbonate-type silicone-modified polyurethane resin, solid content 30%) 100 parts, DMF (dimethylformamide) 10 parts, A polyurethane film with a thickness of 50 m was formed on the release paper using 10 parts of MEK (methyl ethyl ketone).
- Example 2 30% by mass of water was applied to the entangled nonwoven fabric obtained in Example 1 with respect to the PVA, and the tension was not applied for 3 minutes under an atmosphere of relative humidity of 95% and 70 ° C. Let it heat Processed. As a result of the heat treatment, the entangled nonwoven fabric contracted with an area shrinkage of 52%, and the apparent density increased. The heat-treated entangled nonwoven fabric was pressed with a hot roll at 120 ° C. to obtain a nonwoven fabric having a smooth surface with a basis weight of 910 g / m and an apparent density of 0.50 g / cm 3 .
- the nonwoven fabric with a densified surface is impregnated with water-based polyurethane emulsion ("Superflex E-4800") by a dipping method, dried and cured at 150 ° C, and binder resin /
- a resin-containing non-woven fabric having an ultrafine fiber generating fiber ratio of 6/94 was obtained.
- the resin-containing nonwoven fabric is immersed in hot water at 95 ° C, the PVA is dissolved and removed, the surface is buffed, and the binder resin adhered to the surface by immersion is removed.
- a binder base material for artificial leather having a surface composed of ultrafine fibers was obtained without attaching binder resin. The single fineness of the ultrafine fibers was 0.1 decitex.
- a silver surface layer was formed on the densified surface of the obtained base material for artificial leather in the same manner as in Example 1 to obtain a silver-finished artificial leather.
- the resulting silver-tone artificial leather has a high peel strength between the silver surface layer and the artificial leather base material, and has a soft feeling without rebound and a texture with a waist, and also has a fine folded crease. Had.
- a silver-finished artificial leather was produced in the same manner as in Example 1 except that the surface densification treatment by hot pressing in the presence of water was not carried out before impregnation with the aqueous polyurethane emulsion.
- the obtained artificial leather sheet with a silver tone has a good texture, but the peel strength between the silver surface layer and the artificial leather base material is low, resulting in a crease and a lack of fulfillment. there were.
- Silver impregnated artificial leather was prepared in the same manner as in Example 1 except that the surface of the nonwoven fabric was hot-pressed at 120 ° C to give an apparent density of 0.665 gZcm 3 before impregnation with water-based polyurethane emulsion. Produced.
- the obtained silver-tone artificial leather sheet has a fine crease, but has a low peel strength between the hardened silver surface layer and the artificial leather substrate.
- the silver-tone artificial leather of the present invention has high peel strength required for sports shoes, softness without repulsion and a texture with a waist, and has a fine crease, so shoes, balls, It is suitable for leather products such as furniture, vehicle seats, baseball gloves, bags and belts.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008517865A JP4955673B2 (ja) | 2006-05-30 | 2007-05-22 | 人工皮革用基材および銀付調人工皮革 |
EP20070743878 EP2025806B1 (en) | 2006-05-30 | 2007-05-22 | Base material for artificial leather and grained artificial leather |
CN2007800193515A CN101454503B (zh) | 2006-05-30 | 2007-05-22 | 人造皮革用基材和粒面人造皮革 |
US12/302,813 US20090124156A1 (en) | 2006-05-30 | 2007-05-22 | Base material for artificial leather and grained artificial leather |
KR1020087029003A KR101424295B1 (ko) | 2006-05-30 | 2007-05-22 | 인공 피혁용 기재 및 은부조 인공 피혁 |
US13/667,752 US8778126B2 (en) | 2006-05-30 | 2012-11-02 | Base material for artificial leather and grained artificial leather |
Applications Claiming Priority (2)
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JP2006-150170 | 2006-05-30 | ||
JP2006150170 | 2006-05-30 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US12/302,813 A-371-Of-International US20090124156A1 (en) | 2006-05-30 | 2007-05-22 | Base material for artificial leather and grained artificial leather |
US13/667,752 Division US8778126B2 (en) | 2006-05-30 | 2012-11-02 | Base material for artificial leather and grained artificial leather |
Publications (1)
Publication Number | Publication Date |
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WO2007138931A1 true WO2007138931A1 (ja) | 2007-12-06 |
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PCT/JP2007/060444 WO2007138931A1 (ja) | 2006-05-30 | 2007-05-22 | 人工皮革用基材および銀付調人工皮革 |
Country Status (7)
Country | Link |
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US (2) | US20090124156A1 (ja) |
EP (1) | EP2025806B1 (ja) |
JP (1) | JP4955673B2 (ja) |
KR (1) | KR101424295B1 (ja) |
CN (1) | CN101454503B (ja) |
TW (1) | TWI415996B (ja) |
WO (1) | WO2007138931A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011058108A (ja) * | 2009-09-08 | 2011-03-24 | Kuraray Co Ltd | 人工皮革用基材およびその製造方法 |
JP2011252250A (ja) * | 2010-06-01 | 2011-12-15 | Kuraray Co Ltd | 人工皮革用基材、その製造方法、および人工皮革 |
JPWO2015064078A1 (ja) * | 2013-11-01 | 2017-03-09 | 株式会社クラレ | ヌバック調皮革様シート及びその製造方法 |
Families Citing this family (9)
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TWI429806B (zh) * | 2007-03-30 | 2014-03-11 | Kuraray Co | 粒面仿皮革片材及其製法 |
CN102587037A (zh) * | 2012-02-23 | 2012-07-18 | 昆山胜昱无纺布有限公司 | 一种仿里皮无纺布及其制备方法 |
CN102702982A (zh) * | 2012-05-24 | 2012-10-03 | 浙江东化实业有限公司 | 全粒面皮革抛光补伤膏 |
US20140230286A1 (en) * | 2013-02-20 | 2014-08-21 | Tracy Ann Paugh | Biodegradable shoe sole with fixed or detachable upper shoe components |
CN105026640B (zh) * | 2013-02-27 | 2019-03-08 | 可乐丽股份有限公司 | 人造革基材、粒面人造革、以及人造革基材的制造方法 |
CN106948082B (zh) * | 2017-05-11 | 2019-02-19 | 平阳盛兴无纺布有限公司 | 高密度仿里皮 |
EP3633100A4 (en) * | 2017-05-31 | 2021-01-06 | Kuraray Co., Ltd. | GRAINED ARTIFICIAL LEATHER AND ITS MANUFACTURING PROCESS |
CN108103800B (zh) * | 2017-12-08 | 2019-09-17 | 福建宝利特科技股份有限公司 | 改性聚氨脂浆料、人造革及其制备方法 |
CN110747655B (zh) * | 2019-09-26 | 2021-11-23 | 安徽安利材料科技股份有限公司 | 一种篮球用无溶剂聚氨酯环保材料及其制备方法 |
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- 2007-05-22 US US12/302,813 patent/US20090124156A1/en not_active Abandoned
- 2007-05-22 JP JP2008517865A patent/JP4955673B2/ja active Active
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JPWO2015064078A1 (ja) * | 2013-11-01 | 2017-03-09 | 株式会社クラレ | ヌバック調皮革様シート及びその製造方法 |
Also Published As
Publication number | Publication date |
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CN101454503B (zh) | 2012-12-19 |
CN101454503A (zh) | 2009-06-10 |
US20130055535A1 (en) | 2013-03-07 |
JP4955673B2 (ja) | 2012-06-20 |
TW200745408A (en) | 2007-12-16 |
EP2025806B1 (en) | 2013-05-22 |
US20090124156A1 (en) | 2009-05-14 |
TWI415996B (zh) | 2013-11-21 |
JPWO2007138931A1 (ja) | 2009-10-01 |
EP2025806A4 (en) | 2012-05-02 |
KR101424295B1 (ko) | 2014-08-01 |
EP2025806A1 (en) | 2009-02-18 |
US8778126B2 (en) | 2014-07-15 |
KR20090013208A (ko) | 2009-02-04 |
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