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WO2025204137A1 - Cuir synthétique et son procédé de production - Google Patents

Cuir synthétique et son procédé de production

Info

Publication number
WO2025204137A1
WO2025204137A1 PCT/JP2025/003467 JP2025003467W WO2025204137A1 WO 2025204137 A1 WO2025204137 A1 WO 2025204137A1 JP 2025003467 W JP2025003467 W JP 2025003467W WO 2025204137 A1 WO2025204137 A1 WO 2025204137A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
substrate
resin layer
resin composition
thermoplastic resin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2025/003467
Other languages
English (en)
Japanese (ja)
Inventor
寛之 林
隆 上杉
元志 後藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiren Co Ltd
Original Assignee
Seiren 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 Seiren Co Ltd filed Critical Seiren Co Ltd
Publication of WO2025204137A1 publication Critical patent/WO2025204137A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • 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
    • 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
    • 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
    • D06N3/18—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with two layers of different macromolecular materials

Definitions

  • the present invention relates to synthetic leather. More specifically, it relates to synthetic leather suitable for industrial materials such as vehicle interior trims and interior materials.
  • conventional synthetic leathers are often constructed by laminating multiple resin layers with different properties onto a fibrous substrate.
  • physical properties such as abrasion resistance, mechanical properties, and flame retardancy can conflict with physical properties such as flexibility, cushioning, and texture, making it difficult to achieve sufficient levels of satisfaction for all of these simultaneously in a single resin layer.
  • interfaces form between the resin layers, making delamination a common problem.
  • Patent Document 1 discloses synthetic leather made by sequentially laminating a porous layer made of moisture-curing polyurethane resin and a non-porous layer made of polyurethane resin on one side of a fibrous substrate. According to the disclosure in this document, synthetic leather is obtained that has high flame retardancy without compromising design, appearance quality, or texture, and is highly safe for the environment and the human body. However, because the synthetic leather in this document is made by sequentially laminating multiple resin layers, there are interfaces between the multiple resin layers, making it prone to interlayer delamination.
  • Patent Document 2 discloses synthetic leather comprising a substrate layer made of a nonwoven fabric or woven or knitted fabric, an adhesive layer laminated on the substrate layer, and a surface layer laminated on the adhesive layer, with the adhesive layer containing a flame retardant. A porous layer is also provided between the substrate layer and the adhesive layer.
  • this product exclusively employs a method in which the surface layer is formed on release paper, an adhesive layer is further formed on the surface layer, and a porous layer is formed on the substrate layer, and the two are then bonded together, which creates a high possibility of an interface between the adhesive layer and the porous layer that is prone to delamination.
  • Patent Document 3 discloses a method in which a foamable polyurethane resin composition and a thermoplastic elastomer are co-extruded in a molten state to create a two-layer structure, which is then laminated with a fibrous substrate to produce a laminate that can be used for synthetic leather, etc., thereby making interlayer delamination less likely to occur.
  • this method does not aim to simultaneously satisfy multiple different required properties, and therefore does not disclose a method for laminating multiple resin layers with different properties while making the most of each of those properties.
  • JP 2009-19304 A Patent No. 5731086 Japanese Patent Application Publication No. 10-193430
  • the present invention was made in light of this current situation, and aims to provide synthetic leather that has multiple resin composition layers with different physical properties, making it possible to simultaneously satisfy multiple different required characteristics, while preventing delamination between the resin compositions and improving strength and durability.
  • a synthetic leather comprising a laminate including a fibrous substrate and a synthetic resin layer provided on the fibrous substrate, characterized in that the synthetic resin layer includes a plurality of thermoplastic resin composition layers having different compositions, and at least a mixed composition layer is included at the interface between the plurality of thermoplastic resin composition layers, in which the compositions of the adjacent plurality of thermoplastic resin layers are mixed.
  • the synthetic resin layer includes at least a substrate-side thermoplastic resin composition layer present on the surface in contact with the fibrous substrate, and a surface-side thermoplastic resin composition layer present on the surface opposite to the surface in contact with the fibrous substrate, and the surface-side thermoplastic resin composition layer is composed of a thermoplastic polycarbonate-based polyurethane resin composition.
  • the synthetic resin layer includes at least a substrate-side thermoplastic resin composition layer present on the surface in contact with the fibrous substrate, and a surface-side thermoplastic resin composition layer present on the surface opposite to the surface in contact with the fibrous substrate, and the substrate-side thermoplastic resin composition layer is composed of a thermoplastic polyether-based polyurethane resin composition.
  • Synthetic leather according to (1) in which the laminate constituting the synthetic leather further comprises a surface treatment layer containing a silicone-based compound on the surface opposite the fibrous substrate.
  • a method for producing synthetic leather according to (1) comprising the steps of: joining and laminating melts of multiple thermoplastic resin compositions having different compositions supplied from multiple extruders before a T-die; extruding the joined and laminated melts from the T-die by co-extrusion to form a synthetic resin layer; and laminating the synthetic resin layer and a fibrous substrate.
  • the method for producing a synthetic leather according to (6) characterized in that the step of forming the synthetic resin layer comprises extruding a melt of the thermoplastic resin composition for the substrate side from one extruder and a melt of the thermoplastic resin composition for the surface side from another extruder, supplying both melts to a feed block, joining and laminating them in the feed block, and then supplying the joined laminated melt to a co-extrusion T-die connected to the feed block.
  • the viscosity of the molten material is 500 to 10,000 Pa ⁇ s at a shear rate of 100 sec ⁇ 1 and a melting temperature of 185° C.
  • the present invention makes it possible to provide synthetic leather that contains multiple thermoplastic resin composition layers with different compositions in a synthetic resin layer, yet has excellent peel strength between each thermoplastic resin composition layer, and is capable of simultaneously satisfying various conflicting required properties. For example, until now, it has not been easy to simultaneously satisfy abrasion resistance, flexibility, low-temperature flexibility, flame retardancy, low cost, etc., because these properties are in conflict with each other. However, the present invention makes it possible to obtain synthetic leather that has high abrasion resistance while also being excellent in flexibility, low-temperature flexibility, flame retardancy, low cost, etc.
  • polymeric compounds include polyurethane resins and vinyl chloride resins.
  • the type of fiber used in the textile fabric is not particularly limited, and examples include conventionally known fibers such as natural fibers, regenerated fibers, semi-synthetic fibers, and synthetic fibers, and two or more of these may be combined.
  • each of the multiple thermoplastic resin composition layers may be referred to as a single composition layer. Therefore, the synthetic resin layer of the present invention includes both a single composition layer and a mixed composition layer.
  • the mixed composition layer is sandwiched between two single-composition layers (the substrate-side resin layer and the surface-side resin layer) of different compositions, and the compositions of both layers are mixed.
  • the mixed composition layer has a composition close to the substrate-side resin layer on the side closest to the surface-side resin layer, and a composition close to the surface-side resin layer on the side closest to the surface-side resin layer on the side closest to the surface-side resin layer. It is more preferable that the mixing ratio of the respective compositions of the substrate-side resin layer and the surface-side resin layer change continuously in the thickness direction.
  • the resulting synthetic resin layer may be 20 ⁇ m for the surface-side resin layer, 40 ⁇ m for the mixed composition layer, and 180 ⁇ m for the substrate-side resin layer.
  • this is merely an example, and the present invention is not limited thereto.
  • the thickness of the mixed composition layer can be determined visually by cutting the synthetic resin layer in the thickness direction with a razor blade and observing the cross section under a microscope.
  • the matrix resin of the thermoplastic resin composition constituting the synthetic resin layer is not particularly limited, and any conventionally known thermoplastic resin can be used, such as thermoplastic polyurethane resins such as polyether-based polyurethane resins, polyester-based polyurethane resins, and polycarbonate-based polyurethane resins; elastomers such as polyester elastomer resins, polyamide elastomer resins, polyether elastomer resins, polystyrene-based elastomer resins, polyolefin-based elastomer resins, and polyvinyl chloride-based elastomers; and the like, which can be used alone or in combination of two or more.
  • thermoplastic polyurethane resins such as polyether-based polyurethane resins, polyester-based polyurethane resins, and polycarbonate-based polyurethane resins
  • elastomers such as polyester elastomer resins, polyamide elastomer resins, polyether e
  • thermoplastic polyurethane resins are preferably used.
  • thermoplastic polycarbonate-based polyurethane resins are preferred from the standpoint of abrasion resistance
  • thermoplastic polyether-based polyurethane resins are preferred from the standpoints of texture, low-temperature flexibility, and hydrolysis resistance.
  • thermoplastic polyurethane resin can be used as long as it can be melted by heating, and generally, a thermoplastic polyurethane resin obtained by reacting a polymer diol, an organic diisocyanate, and a chain extender is used.
  • a thermoplastic polyurethane resin obtained by reacting a polymer diol having a number average molecular weight of preferably 800 to 8000, more preferably 900 to 6000, with an organic diisocyanate and a chain extender is preferably used.
  • the number average molecular weight can be determined by measurement by gel permeation chromatography (GPC) using polystyrene as a standard substance.
  • polymer diols preferably used in the production of thermoplastic polyurethane resins include polyester diols, polyether diols, polycarbonate diols, polyester polycarbonate diols, and polyester polyether diols, and one or more of these can be used. Of these, it is preferable to use polycarbonate diols and/or polyether diols as the polymer diols.
  • polycarbonate diols are used as the polymer diol, thermoplastic polycarbonate-based polyurethane resins are obtained, and when polyether diols are used as the polymer diol, thermoplastic polyether-based polyurethane resins are obtained.
  • low molecular weight diol components include aliphatic diols such as ethylene glycol, 1,3-propanediol, 2-methyl-1,3-propanediol, 1,4-butanediol, neopentyl glycol, 1,5-pentanediol, 3-methyl-1,5-pentanediol, 1,6-hexanediol, 1,8-octanediol, 2-methyl-1,8-octanediol, 1,9-nonanediol, and 1,10-decanediol; and alicyclic diols such as cyclohexanedimethanol and cyclohexanediol. One or more of these can be used.
  • aliphatic diols such as ethylene glycol, 1,3-propanediol, 2-methyl-1,3-propanediol, 1,4-butaned
  • polyether diols used in the production of thermoplastic polyurethane resins include polyethylene glycol, polypropylene glycol, and polytetramethylene glycol, and one or more of these can be used.
  • organic diisocyanate used in the production of thermoplastic polyurethane resin, and any of the organic diisocyanates conventionally used in the production of polyurethanes can be used. Of these, one or more of aromatic diisocyanates, alicyclic diisocyanates, and aliphatic diisocyanates with a molecular weight of 500 or less are preferably used as the organic diisocyanate.
  • Aliphatic or alicyclic diisocyanates that can be used are preferably those with 4 to 30 carbon atoms.
  • Examples of aliphatic diisocyanates include tetramethylene diisocyanate, 1,5-pentamethylene diisocyanate (PDI), 1,6-hexamethylene diisocyanate (HDI), 2,2,4- (or 2,4,4-) trimethyl-1,6-hexamethylene diisocyanate, and lysine diisocyanate.
  • alicyclic diisocyanates examples include isophorone diisocyanate, hydrogenated xylene diisocyanate, hydrogenated diphenylmethane diisocyanate, norbornane diisocyanate, 1,4-diisocyanatocyclohexane, 1,3-bis(diisocyanatomethyl)cyclohexane, and 4,4'-dicyclohexylmethane diisocyanate.
  • Aromatic diisocyanates include 1,3-xylene diisocyanate, 1,4-xylene diisocyanate, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, diphenylmethane diisocyanate, phenylene diisocyanate, dimethyldiphenylmethane diisocyanate, triphenylmethane triisocyanate, naphthalene diisocyanate, and polymethylene polyphenyl polyisocyanate.
  • diisocyanates may be used alone or in combination. More preferred are 1,5-pentamethylene diisocyanate (PDI), 1,6-hexamethylene diisocyanate (HDI), isophorone diisocyanate, 1,3-xylene diisocyanate, 1,4-xylene diisocyanate, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, and diphenylmethane diisocyanate. Of these, 1,6-hexamethylene diisocyanate is preferred due to its weather resistance and ease of industrial availability. Furthermore, considering the impact on the environment, it is preferable to use environmentally friendly 1,5-pentamethylene diisocyanate, which is a plant-derived isocyanate.
  • PDI 1,5-pentamethylene diisocyanate
  • HDI 1,6-hexamethylene diisocyanate
  • isophorone diisocyanate 1,3-xylene diisocyanate
  • chain extender used in the production of thermoplastic polyurethane resin
  • any of the conventionally used chain extenders can be used.
  • low-molecular-weight compounds with a molecular weight of 300 or less and containing two or more active hydrogen atoms in the molecule that can react with isocyanate groups are preferred.
  • chain extenders examples include diols such as ethylene glycol, propylene glycol, 1,4-butanediol, 1,6-hexanediol, 1,4-bis( ⁇ -hydroxyethoxy)benzene, 1,4-cyclohexanediol, bis-( ⁇ -hydroxyethyl)terephthalate, and xylylene glycol; diamines such as hydrazine, ethylenediamine, propylenediamine, xylylenediamine, isophoronediamine, piperazine and its derivatives, phenylenediamine, tolylenediamine, xylylenediamine, dihydrazine adipate, and dihydrazine isophthalate; and aminoalcohols such as aminoethyl alcohol and aminopropyl alcohol.
  • diols such as ethylene glycol, propylene glycol, 1,4-butanediol, 1,6-hexanedio
  • aliphatic diols having 2 to 10 carbon atoms are preferred because the polyurethane foam layer obtained from them, and in turn the laminate, has good mechanical properties, with 1,4-butanediol being particularly preferred.
  • thermoplastic polyurethane resin obtained by reacting the above-mentioned polymeric diol, organic diisocyanate, and chain extender is preferably used.
  • the method for producing the thermoplastic polyurethane resin can be produced by the prepolymer method or one-shot method using known urethane reaction techniques, using a polymeric diol, organic diisocyanate, chain extender, and, if necessary, other components.
  • a method of melt polymerization substantially in the absence of solvent particularly a method of continuous melt polymerization using a multi-screw extruder, is preferably used.
  • Phosphorus-based flame retardants include, for example, diorganylphosphinates, ammonium polyphosphates, aluminum phosphates, phosphate esters, guanidine phosphates, and organic phosphine oxides, and these can be used alone or in combination of two or more.
  • the volume fraction of bubbles in the synthetic resin layer of the present invention is not particularly limited, but is preferably 10% or more, more preferably 20% or more.
  • the upper limit of the volume fraction of bubbles is not particularly limited, but is preferably 60% or less, more preferably 50% or less.
  • a volume fraction of 10% or more tends to provide sufficient flexibility, while a volume fraction of 60% or less tends to provide sufficient abrasion resistance.
  • the volume fraction of bubbles is a value calculated based on the sum of the volume of the thermoplastic resin composition layer containing the bubble-generating agent and the volume of the mixed composition layer up to the midpoint.
  • the volume fraction of bubbles can be determined by cutting the synthetic resin layer with a razor blade, photographing the cross section with a microscope, and using image processing software to calculate the sum of the area of the thermoplastic resin composition layer containing the bubble-generating agent and the area of the mixed composition layer up to the midpoint in the thickness direction, and the area of the bubbles, and then using the following formula:
  • the synthetic resin layer of the present invention preferably includes a thermoplastic resin composition layer containing thermally expandable microcapsules as a bubble-generating agent.
  • Thermally expandable microcapsules are tiny plastic spheres that encapsulate hydrocarbons that vaporize at approximately the molding temperature within a shell of a thermoplastic polymer, such as vinylidene chloride resin or acrylonitrile resin.
  • thermally expandable microcapsules include the "Advancell EM” series manufactured by Sekisui Chemical Co., Ltd., the “Matsumoto Microsphere F” and “Matsumoto Microsphere FN” series manufactured by Matsumoto Yushi Seiyaku Co., Ltd., and the "Kureha Microsphere H” and "Kureha Microsphere S” series manufactured by Kureha Corporation.
  • the synthetic resin layer of the present invention preferably includes a thermoplastic resin composition layer containing a thermally decomposable foaming agent as a bubble-generating agent.
  • a thermally decomposable foaming agent include azodicarbonamide-based foaming agents, (4,4'-oxybis(benzenesulfonylhydrazide)-based foaming agents, and sodium bicarbonate-based foaming agents.
  • the synthetic resin layer of the present invention preferably includes a thermoplastic resin composition layer containing hollow particles as a bubble-generating agent.
  • preferred hollow particles include plastic microballoons, hollow glass beads, hollow polymer beads, and shirasu balloons.
  • thermoplastic resin composition containing thermally expandable microcapsules are particularly preferred in terms of appearance quality and physical properties, especially abrasion resistance, because the bubbles do not connect with each other and become large, and the large bubbles do not cause surface irregularities or holes in the resin layer.
  • the target thickness of the surface-side resin layer which is a single-composition layer made of a thermoplastic polycarbonate-based polyurethane resin composition, is not particularly limited, but is preferably 10 ⁇ m or more, and more preferably 20 ⁇ m or more. There is no particular upper limit, but it is preferably 100 ⁇ m or less, and more preferably 80 ⁇ m or less. A thickness of 10 ⁇ m or more tends to provide sufficient abrasion resistance. A thickness of 100 ⁇ m or less does not risk the texture becoming rough or hard.
  • the surface-side resin layer may contain flame retardants, colorants, heat stabilizers, conductivity imparting agents, antistatic agents, moisture permeability enhancers, water repellents, oil repellents, water absorbents, moisture absorbents, deodorizers, pigment dispersants, hydrolysis inhibitors, etc.
  • resin components such as thermoplastic polyether-based polyurethane resin, thermoplastic polyester-based polyurethane resin, polyethylene resin, and polypropylene resin may also be contained.
  • the surface-side resin layer is preferably a non-porous layer.
  • At least the substrate-side resin layer is preferably composed of a thermoplastic polyether-based polyurethane resin as a matrix resin.
  • a layer containing a thermoplastic polyether-based polyurethane resin which has excellent flexibility, as a single-component layer on the fibrous substrate side of the synthetic resin layer makes it possible to produce synthetic leather with excellent texture, low-temperature flexibility, and hydrolysis resistance.
  • the target thickness of the substrate-side resin layer which is a single-composition layer composed of a thermoplastic polyether-based polyurethane resin composition, is not particularly limited, but is preferably 40 ⁇ m or more, and more preferably 90 ⁇ m or more. There is no particular upper limit, but it is preferably 400 ⁇ m or less, and more preferably 300 ⁇ m or less. A thickness of 40 ⁇ m or more tends to provide sufficient flexibility. A thickness of 400 ⁇ m or less does not risk the texture becoming rough and hard.
  • the substrate-side resin layer preferably contains a flame retardant.
  • the amount of flame retardant contained in the substrate-side resin layer as a single-composition layer is not particularly limited, but is preferably 10 g/ m2 or more, more preferably 20 g/m2 or more .
  • the upper limit is not particularly limited, but is preferably 100 g/m2 or less , more preferably 80 g/ m2 or less. When the amount is 10 g/ m2 or more, sufficient flame retardancy is obtained, and when it is 100 g/m2 or less , there is no risk of the texture becoming rough and hard.
  • the substrate-side resin layer preferably contains air bubbles.
  • the inclusion of air bubbles allows for the production of synthetic leather that is flexible and has an excellent texture.
  • the size of the air bubbles (average diameter or the average length of the longest part of the cross-sectional shape) is preferably 10 ⁇ m or more, more preferably 20 ⁇ m or more. There is no particular upper limit to the size of the air bubbles, but it is preferably 300 ⁇ m or less, more preferably 200 ⁇ m or less. Air bubbles of 10 ⁇ m or more tend to provide sufficient flexibility. Air bubbles of 300 ⁇ m or less tend to provide sufficient abrasion resistance.
  • Methods for incorporating bubbles into the substrate-side resin layer include, but are not limited to, blending a bubble-generating agent into the thermoplastic resin composition for the substrate-side resin layer. Specific examples include mixing hollow particles into the thermoplastic resin composition, or mixing thermally expandable microcapsules, which encapsulate substances that vaporize at the molding temperature to generate bubbles, or a thermally decomposable blowing agent, which decomposes at the molding temperature to generate bubbles, into the thermoplastic resin composition before molding, and then foaming within the resin layer during molding.
  • Thermal expandable microcapsules include, for example, tiny plastic spheres containing hydrocarbons that vaporize at around the molding temperature within a shell of a thermoplastic polymer such as vinylidene chloride resin or acrylonitrile resin, as mentioned above.
  • the blending ratio is preferably such that the volume fraction of bubbles after foaming is 10 to 60% by volume relative to the substrate-side resin layer.
  • hollow particles examples include plastic microballoons.
  • plastic microballoons When hollow particles are mixed, there are no particular restrictions on the preferred amount, but it is preferable to mix them so that the volume ratio of air bubbles after foaming to the substrate-side resin layer is 10 to 60 volume %.
  • thermal decomposition type blowing agents examples include azodicarbonamide-based blowing agents, (4,4'-oxybis(benzenesulfonylhydrazide)-based blowing agents, and sodium bicarbonate-based blowing agents.
  • azodicarbonamide-based blowing agents 4,4'-oxybis(benzenesulfonylhydrazide)-based blowing agents
  • sodium bicarbonate-based blowing agents sodium bicarbonate-based blowing agents.
  • the volume fraction of air bubbles in the substrate-side resin layer is not particularly limited, but is preferably 10% or more, and more preferably 20% or more. There is no particular upper limit to the volume fraction of air bubbles, but it is preferably 60% or less, and more preferably 50% or less. A volume fraction of 10% or more tends to provide sufficient flexibility, while a volume fraction of 60% or less tends to provide sufficient abrasion resistance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)

Abstract

Le problème abordé par la présente invention consiste à fournir un cuir synthétique ayant une résistance à l'abrasion et une ininflammabilité appropriées pour des matériaux industriels tels que des matériaux pour intérieur de véhicule et des matériaux d'intérieur, en particulier pour des sièges, le cuir synthétique ne provoquant pas de problème de délaminage entre différents types de résine dans une couche de résine.　La solution selon l'invention porte sur un cuir synthétique qui comprend un stratifié comprenant un matériau de base fibreux et une couche de résine synthétique disposée sur le matériau de base fibreux, la couche de résine synthétique comprenant une pluralité de couches de composition de résine thermoplastique ayant différentes compositions, et au moins une couche de composition mélangée étant incluse au niveau d'une surface limite de couches adjacentes de la pluralité de couches de composition de résine thermoplastique, les compositions des couches de composition de résine thermoplastique adjacentes étant mélangées dans la couche de composition mélangée.　
PCT/JP2025/003467 2024-03-28 2025-02-03 Cuir synthétique et son procédé de production Pending WO2025204137A1 (fr)

Applications Claiming Priority (2)

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JP2024-055099 2024-03-28
JP2024055099 2024-03-28

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5573813A (en) * 1990-03-02 1996-11-12 Hexcel Corporation Method and apparatus for impregnating fibers with highly viscous materials and article made therewith
JPH09158056A (ja) * 1995-12-04 1997-06-17 Kuraray Co Ltd 合成皮革及びその製造方法
JPH1077582A (ja) * 1996-09-04 1998-03-24 Teijin Ltd 表面平滑性に富むシート状物の製造方法
JPH10193430A (ja) * 1997-01-16 1998-07-28 Kuraray Co Ltd 積層体を製造する方法
JPH10278182A (ja) * 1997-04-03 1998-10-20 Kuraray Co Ltd 積層体およびその製造方法
JP2006508836A (ja) * 2002-12-09 2006-03-16 ダウ グローバル テクノロジーズ インコーポレイティド ポリウレタン分散液系発泡体を物品へ適用する方法
WO2019216164A1 (fr) * 2018-05-09 2019-11-14 株式会社クラレ Feuille granuleuse similaire au cuir
WO2022185689A1 (fr) * 2021-03-03 2022-09-09 セーレン株式会社 Cuir synthétique

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5573813A (en) * 1990-03-02 1996-11-12 Hexcel Corporation Method and apparatus for impregnating fibers with highly viscous materials and article made therewith
JPH09158056A (ja) * 1995-12-04 1997-06-17 Kuraray Co Ltd 合成皮革及びその製造方法
JPH1077582A (ja) * 1996-09-04 1998-03-24 Teijin Ltd 表面平滑性に富むシート状物の製造方法
JPH10193430A (ja) * 1997-01-16 1998-07-28 Kuraray Co Ltd 積層体を製造する方法
JPH10278182A (ja) * 1997-04-03 1998-10-20 Kuraray Co Ltd 積層体およびその製造方法
JP2006508836A (ja) * 2002-12-09 2006-03-16 ダウ グローバル テクノロジーズ インコーポレイティド ポリウレタン分散液系発泡体を物品へ適用する方法
WO2019216164A1 (fr) * 2018-05-09 2019-11-14 株式会社クラレ Feuille granuleuse similaire au cuir
WO2022185689A1 (fr) * 2021-03-03 2022-09-09 セーレン株式会社 Cuir synthétique

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