WO2005065937A1 - 合成皮革製造用エンボス付き離型紙及びその支持体、ならびにその離型紙を用いた合成皮革及びその製造方法 - Google Patents
合成皮革製造用エンボス付き離型紙及びその支持体、ならびにその離型紙を用いた合成皮革及びその製造方法 Download PDFInfo
- Publication number
- WO2005065937A1 WO2005065937A1 PCT/JP2004/019356 JP2004019356W WO2005065937A1 WO 2005065937 A1 WO2005065937 A1 WO 2005065937A1 JP 2004019356 W JP2004019356 W JP 2004019356W WO 2005065937 A1 WO2005065937 A1 WO 2005065937A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- release paper
- synthetic leather
- layer
- ionizing radiation
- embossed
- Prior art date
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- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/80—Masked polyisocyanates
- C08G18/8061—Masked polyisocyanates masked with compounds having only one group containing active hydrogen
- C08G18/8083—Masked polyisocyanates masked with compounds having only one group containing active hydrogen with compounds containing at least one heteroatom other than oxygen or nitrogen
- C08G18/809—Masked polyisocyanates masked with compounds having only one group containing active hydrogen with compounds containing at least one heteroatom other than oxygen or nitrogen containing silicon
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/81—Unsaturated isocyanates or isothiocyanates
- C08G18/8141—Unsaturated isocyanates or isothiocyanates masked
- C08G18/815—Polyisocyanates or polyisothiocyanates masked with unsaturated compounds having active hydrogen
- C08G18/8158—Polyisocyanates or polyisothiocyanates masked with unsaturated compounds having active hydrogen with unsaturated compounds having only one group containing active hydrogen
- C08G18/8175—Polyisocyanates or polyisothiocyanates masked with unsaturated compounds having active hydrogen with unsaturated compounds having only one group containing active hydrogen with esters of acrylic or alkylacrylic acid having only one group containing active hydrogen
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
- C09D175/16—Polyurethanes having carbon-to-carbon unsaturated bonds having terminal carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/06—Polyurethanes from polyesters
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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
-
- 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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- D21H1/00—Paper; Cardboard
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- D—TEXTILES; PAPER
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- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/001—Release paper
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0866—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using particle radiation
- B29C2035/0872—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using particle radiation using ion-radiation, e.g. alpha-rays
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
- B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
- B29C59/046—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts for layered or coated substantially flat surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2033/00—Use of polymers of unsaturated acids or derivatives thereof as moulding material
- B29K2033/04—Polymers of esters
- B29K2033/08—Polymers of acrylic acid esters, e.g. PMA, i.e. polymethylacrylate
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
-
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- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/26—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer which influences the bonding during the lamination process, e.g. release layers or pressure equalising layers
- B32B2037/268—Release layers
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- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/02—Synthetic macromolecular particles
- B32B2264/0207—Particles made of materials belonging to B32B25/00
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
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- B32—LAYERED PRODUCTS
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
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- B32B2310/00—Treatment by energy or chemical effects
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- B32B2310/0875—Treatment by energy or chemical effects by wave energy or particle radiation using particle radiation
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- B32B2554/00—Paper of special types, e.g. banknotes
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- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/02—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations
- B32B37/025—Transfer laminating
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- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/24—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- D21H19/00—Coated paper; Coating material
- D21H19/80—Paper comprising more than one coating
- D21H19/82—Paper comprising more than one coating superposed
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
- D21H25/04—Physical treatment, e.g. heating, irradiating
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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
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
- Y10T428/24612—Composite web or sheet
Definitions
- the present invention relates to an embossed release paper for producing synthetic leather, a support thereof, a synthetic leather using the release paper, and a method for producing the same. More specifically, the present invention relates to an embossed release paper using an ionizing radiation curable coating material having a specific composition.
- embossed release paper has been used as a process release paper for synthetic leather.
- synthetic leather polyurethane (hereinafter, abbreviated as PU), Shiridani Bull (hereinafter, abbreviated as PVC), a combination of PU and PVC, and the like are known.
- PU leather for example, a paste-like PU resin for a skin layer is coated on release paper, dried and solidified at a temperature of 90 to 140 ° C, and then a two-part curing type PU is prepared.
- PU leather is manufactured by laminating the base paper with a base adhesive and reacting it in an aging room at 40-70 ° C for 2-3 days, and then peeling off the release paper.
- These PU resins are generally of the organic solvent-soluble type, but recently, both environmentally friendly and aqueous types have been used. In that case, drying may be performed at a high temperature of 150-180 ° C.
- a PVC sol is coated on release paper, heated at 200 to 250 ° C and gelled, then a PVC foam layer is formed and bonded to a base fabric. After that, there is a method of manufacturing PVC leather by peeling off the release paper.
- a paste-like PU resin for a skin layer is coated on release paper, dried and solidified.
- a PVC foam layer is bonded to a base fabric, and then the release paper is peeled off.
- split leather in which these synthetic leathers are bonded to natural leather is also known.
- release paper coated with silicone resin and further provided with an embossed pattern by embossing is generally used.
- the film forming temperature of PVC is relatively high, it is easy to cause glossy unevenness due to poor embossing moldability.
- thermoplastic resin such as polypropylene or 4-methyl-1 pentene is extruded and coated. Then, a release paper on which an embossing force is applied is used. Release paper for PU leather is excellent in embossable formability, good in peelability in the production of synthetic leather using two-part curable PU, and excellent in repeated use. However, since the release paper is composed of a thermoplastic resin, there is a problem that heat release is inferior and that the release paper cannot be used for producing PVC leather.
- release paper coated with thermoplastic resin by extrusion coating is only partially used for PVC leather and semi-synthetic leather, and is used for both PVC leather and PU leather.
- the release paper that can be used was strong.
- embossed release paper is a paper web in which an electron beam irradiation curable atalylate-based coating composition is applied to an embossed aluminum plate, and the coated surface of the paper is coated with a base coating that is as strong as a pigment Z. Is pressed, and the coating surface of the coating composition is hardened by irradiating the coating surface with an electron beam through the layer of the paper web, and then the aluminum plate is peeled off.
- the release paper has the advantage of being excellent in emboss reproducibility
- the isocyanate which is a curing agent used in the two-part curing type PU, reacts with the electron beam curable resin on the release paper surface. Therefore, there is a disadvantage that the release paper becomes difficult to peel off.
- the coating amount of the electron beam-curable resin is as large as 40 to 150 g / m 2 , the production cost of the release paper is very high.
- a release paper using a resin mainly composed of a compound having an ethylenic unsaturated bond, such as an epoxy acrylate resin, which is cured by irradiation with ionizing radiation has been proposed! (Japanese Patent Publication No. 64-10626).
- the above-described embossed release paper is formed by applying a coating material containing a compound having an ethylenically unsaturated bond as a main component to one side of the paper to form an uncured coat layer, and embossing the surface of the coat layer. Thereafter, the embossed coat layer is obtained by irradiating the embossed coat layer with an electron beam or ultraviolet rays to cure the coat layer.
- an uncured ionizing radiation-curable resin layer is provided on a support, as in the release paper with an emboss disclosed in Japanese Patent Publication No. 64-10626 / JP-A-5-269931.
- the surface morphology of the ionized radiation-curable resin layer after curing is the same as that before embossing. Because the surface morphology of the cured ionizing radiation-curable resin layer is affected, in order to obtain release paper for synthetic leather with a glossy feel, the uncured uncured paper before embossing is used.
- the surface morphology of the ionizing radiation-curable resin layer must be appropriate.
- the present inventors have moldability, heat resistance, and durability, and have peelability even with a two-part curable PU adhesive. It has been found that an embossed release paper for production of synthetic leather which is excellent in quality can be obtained.
- release paper can be used for slippage of synthetic leather such as PU, PVC, and semi-leather.
- a support made of a specific material for release paper it can be used for any of PU, PVC, semi-synthetic leather and other synthetic leathers, and has moldability, heat resistance, and durability.
- a synthetic leather having a glossy texture can be obtained.
- a first object of the present invention is to provide moldability, heat resistance, durability, and excellent releasability even with a two-part curable PU adhesive, and to use PU, PVC, semi-curable
- An object of the present invention is to provide an embossed release paper for producing synthetic leather which can be used for any synthetic leather such as synthetic leather, and a method for producing the same.
- a second object of the present invention is to provide an embossed release that is excellent in mold release and workability even when synthetic leather is manufactured using repeated release paper, and that can obtain synthetic leather at low cost.
- An object of the present invention is to provide a pattern and a method for producing the pattern.
- a third object of the present invention is to provide a synthetic leather such as PU, PVC, and semi-synthetic leather, which can be used for slippage, has moldability, heat resistance, durability, and gloss. It is an object of the present invention to provide a support used for an embossed release paper from which a synthetic leather having a pleasant texture can be obtained.
- the embossed release paper for the production of synthetic leather as the first aspect of the present invention comprises at least paper as a support and an ionizing radiation cured film provided on the paper.
- a reaction product comprising an isocyanate conjugate and a (meth) acrylic conjugate which has a (meth) atalyloyl group and can react with the isocyanate conjugate, or
- a coating liquid comprising at least a softening point of an ionizing radiation-curable composition having a softening point of 40 ° C. or higher, which is cured by irradiation with ionizing radiation.
- a method for producing the embossed release paper for the synthetic leather produced as a second embodiment of the present invention is supported as a coating solution, the coating amount mosquito ⁇ over 40GZm 2 after drying A process of forming a coating film by coating on the surface of the holding body,
- the coating liquid is N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl
- a reaction product comprising an isocyanate conjugate and a (meth) acrylic conjugate which has a (meth) atalyloyl group and can react with the isocyanate conjugate, or
- It is characterized by being diluted with 10 to 1000 parts by weight of a solvent with respect to 100 parts by weight of a solid content in a coating liquid.
- the polyurethane resin composition is coated on the embossed ionized radiation cured film. Heating and drying to form a skin layer, A step of laminating a base cloth on the skin layer via an adhesive to form a synthetic leather layer, and
- a synthetic leather according to a fourth aspect of the present invention is a synthetic leather manufactured using the above-described embossed release paper, and a release table of the synthetic leather obtained by releasing the release paper.
- the surface is characterized by a silicon-derived silicon content of 20% or less.
- the support as the fifth aspect of the present invention is a support used for an embossed release paper for producing synthetic leather, comprising a base paper having a clay coat layer on one surface, wherein the base paper is ,
- the tensile strength by the measurement method in accordance with JIS P8113 after leaving at 230 ° C for 3 minutes is maintained at least lOkNZm or more in the vertical direction, and the JIS P8116 after leaving for 3 minutes at 230 ° C. It has heat resistance so that the tear strength by a conforming measurement method is maintained at 500 mN or more in both the vertical and horizontal directions, and
- the clay coat layer has a smoothness of 100 seconds or more according to a measurement method in accordance with JIS P8119, and is formed so as to absorb surface irregularities due to pulp fibers of the base paper.
- the present invention has moldability, heat resistance, and durability, and is excellent in peelability even with a two-part curable PU adhesive.
- embossed release paper for synthetic leather production that can be used for any of PU, PVC, semi-synthetic leather, etc. can be realized.
- the synthetic leather is excellent in releasability and workability and can be obtained at low cost. Release paper with embossing can be realized.
- the fifth aspect of the present invention can be used for any of synthetic leathers such as PU, PVC, semi-synthetic leather, and has moldability, heat resistance, durability, and
- a support used for embossed release paper from which synthetic leather having a glossy texture can be obtained can be realized.
- FIG. 1 is a diagram showing an example of a production process of an embossed release paper for producing synthetic leather according to the present invention. is there.
- FIG. 2 is a cross-sectional view of an embossed release paper support for producing synthetic leather of the present invention.
- FIG. 3 is a cross-sectional view of an embossed release paper for producing synthetic leather according to the present invention.
- An embossed release paper comprises at least paper as a support, an ionizing radiation cured film provided on the paper, and embossed on the cured film to produce an embossed synthetic leather.
- Release paper wherein the ionizing radiation cured film is obtained by curing a coating liquid by irradiation with ionizing radiation. This coating liquid will be described first.
- the coating liquid used in the present invention is a reaction product comprising an isocyanate conjugate and a (meth) acrylic compound having a (meth) atalyloyl group and capable of reacting with the isocyanate compound, or
- composition contains an ionizing radiation-curable composition having a softening point of 40 ° C. or higher, which comprises the reaction product described above.
- (meth) atalyloyl group means an atalyloyl group and a Z or metharyloyl group
- (meth) acrylic conjugate means an acryly conjugate and Z or a metharyliyl conjugate.
- (meth) acrylate refers to acrylate and Z or methacrylate
- (meth) acrylic acid refers to acrylic acid and Z or methacrylic acid.
- the isocyanate conjugate used in the present invention is a compound having at least one isocyanate group, preferably a compound having two or more isocyanate groups.
- fats such as phenyl isocyanate, xylyl isocyanate, naphthyl isocyanate, hexamethylene diisocyanate, lysine methyl ester diisocyanate, and 2,4,4 trimethyl hexamethylene diisocyanate.
- Alicyclic isocyanates such as aliphatic isocyanates, isophorone diisocyanate, and 4,4-methylenebis (cyclohexyl isocyanate);
- Aromatic isocyanates such as tolylene diisocyanate, 4,4, diphenylmethane diisocyanate, naphthalene 1,5, -diisocyanate, and trimer of tolylene diisocyanate, and tolylene diisocyanate
- a 3: 1 (molar ratio) reaction product of a carboxylate and an active hydrogen compound such as trimethylolpropane can be used.
- a compound having an isocyanate group bonded to a non-aromatic hydrocarbon ring, a trimer of a so-called alicyclic isocyanate compound or a reaction product with an active hydrogen compound, etc. is used.
- the alicyclic isocyanate conjugate it is preferable to use isophorone diisocyanate which is easily available on the market, but hydrogenated tolylene diisocyanate, hydrogenated xylylene diisocyanate, hydrogenated diphenylmethane diisocyanate. Etc. can also be used.
- trimer of isophorone diisocyanate or a 3: 1 (molar ratio) reaction product of isophorone diisocyanate and trimethylolpropane are preferable as the isocyanate disulfide used in the present invention. Among them, trimers of isophorone diisocyanate are more preferable. You can use some of Isocyane's toy daggers together.
- Examples of the (meth) acrylic compound having a (meth) atalyloyl group and capable of reacting with the isocyanate conjugate include a (meth) acrylic conjugate having a hydroxyl group and a Z or carboxyl group.
- the “(meth) acrylic compound having a (meth) atalyloyl group and capable of reacting with the isocyanate conjugate” may be abbreviated as “specific (meth) acryl conjugate”.
- reaction product of the isocyanate compound and the specific (meth) acrylic compound having a hydroxyl group is usually called "urethane acrylate".
- reaction product of the isocyanate conjugate and the specific (meth) acryl conjugate having a carboxyl group is a compound having a structure in which a polymerizable (meth) atalyloyl group is bonded via an amide group.
- a specific (meth) acrylic compound having a hydroxyl group a typical example is a hydroxyester which is a reaction product of (meth) acrylic acid and a polyhydroxy compound.
- conjugated products obtained by adding ethylene oxide, propylene oxide, dextran protataton and the like may be mentioned, for example, conjugated products obtained by adding ethylene oxide, propylene oxide, dextran protataton and the like to the hydroxyl group of the hydroxy ester.
- Examples of some of them include hydroxyethyl (meth) atalylate, hydroxypropyl ( Hydroxy (meta) acrylates, isocyanurates such as (meth) atalylate, hydroxybutyl (meth) acrylate, trimethylolpropane diatalylate, pentaerythritol triatalylate, dipentaerythritol tetraatalylate, dipentaerythritol pentaatalylate, etc.
- Acid diatalylate pentaerythritol diacrylate monostearate, 2-hydroxy-3-phenoxypropyl atalylate, and furthermore, kaprolate with power prolatatone, ethylene oxide adduct, propylene oxide adduct, ethylene oxide 'Addition products of propylene oxide.
- a hydroxyl group of epoxy acrylate may be used.
- Specific compounds include neopentyl glycol diglycidyl ether, 1,6-hexanediol diglycidyl ether, hydrogenated bisphenol A diglycidyl ether, ethylene glycol diglycidyl ether, and propylene glycol diglycidyl ether.
- Epoxy acrylate obtained by reacting a compound having two epoxies in a molecule with acrylic acid can be mentioned. Since these components have two (meth) atalyloyl groups in one molecule, they also have the effect of improving the crosslink density.
- (meth) acrylic conjugate having a carboxyl group (meth) acrylic acid itself or the above-mentioned hydroxy (meth) atalylate may be added to a carboxylic acid anhydride, for example, maleic anhydride, Examples include compounds obtained by reacting succinic anhydride, phthalic anhydride, tetrahydrophthalic anhydride, and the like.
- pentaerythritol triatalylate succinate monoester dipentaerythritol pentaacrylate succinate monoester, pentaerythritol triatalylate maleate monoester, dipentaerythritol pentaatalylate maleate.
- the curable composition obtained has a higher softening point and the flexibility of the finally obtained cured coating film increases.
- an active hydrogen-containing compound a hydroxyl group-containing compound is usually used, but an amino group-containing compound or a carboxyl group-containing compound can also be used.
- Examples of the hydroxyl group-containing compound include glycerin, trimethylolpropane, trimethylolethane, 1,2,6-hexanetriol, 2-hydroxyethyl-1,6-hexanediol, and 1,2,4-butanetriol.
- High-molecular-weight polyols such as polyether polyols, polyester polyols, polyether ester polyols, polycarbonate polyols, and polyacryl polyols can also be used.
- polyether polyols include glycols such as bisphenol A polyethylene glycol, propylene glycol, and diethylene glycol; polyols having three or more hydroxyl groups such as glycerin, trimethylolethane, trimethylolpropane, and pentaerythritol; or Polyamines such as ethylenediamine, toluenediamine, etc., and caropolymerized with alkylene oxides, such as ethylene oxide and propylene oxide, and polytetramethylene ethers obtained by ring-opening polymerization of tetrahydrofuran. Terdari call and the like.
- polyester polyol examples include dicarboxylic acids such as succinic acid, adipic acid, sebacic acid, azelaic acid, and phthalic acid; or carboxylic acids such as tri- or tetracarboxylic acid such as trimellitic acid and pyromellitic acid; and ethylene glycol.
- the polyetherester polyol is obtained by reacting the above-mentioned dicarboxylic acid or an anhydride thereof with a product obtained by reacting an alkylene oxide with a polyester glycol, or a mixture of an ether group-containing diol or a mixture thereof with another dalicol.
- poly (polytetramethylene ether) adipate Such as poly (polytetramethylene ether) adipate.
- the polycarbonate polyol include a de-alcohol condensation reaction of a polyhydric alcohol with a dialkyl carbonate such as dimethyl and getyl, a dephenol condensation reaction of a polyhydric alcohol with di-fluorocarbonate, and a de-ethylene glycol condensation of a polyhydric alcohol with ethylene carbonate.
- Examples include polycarbonate polyols obtained by a reaction or the like.
- Polyhydric alcohols used in this condensation reaction include, for example, 1,6 xandiol, diethylene glycol, propylene glycol, 1,4 butanediol, 1,5 pentanediol, 3-methyl-1,5 pentanediol, Aliphatic diols such as 2-getylpropanediol, 2-ethyl-2-butylpropanediol and neopentyl glycol, or alicyclic rings such as 1,4-cyclohexanediol and 1,4-cyclohexanedimethanol Group diols.
- Examples of the amino group-containing compound include hexamethylene diamine, xylylene diamine, isophorone diamine, N, N-dimethylethylene diamine and the like. Amino alcohols such as monoethanolamine and diethanolamine can also be used as the active hydrogen-containing compound.
- Examples of the carboxyl group-containing conjugate include lauric acid, stearic acid, oleic acid, palmitic acid, adipic acid, sebacic acid, phthalic acid, isophthalic acid, and terephthalic acid.
- Active hydrogen compounds other than these specific (meth) acrylic compounds do not impair the properties of the reaction product of the isocyanate compound and the specific (meth) acrylic compound! It is preferred that the molar ratio of the reactive group of the active hydrogen compound to the reactive group of the compound be 50% or less, particularly 40% or less.
- the reaction of the isocyanate conjugate and the specific (meth) acrylic conjugate is preferably performed using a solvent.
- a solvent makes it easier to control the reaction and adjusts the viscosity of the reaction product.
- the solvent include inert solvents commonly used in this type of reaction, for example, aromatic hydrocarbon solvents such as toluene and xylene, ketone solvents such as methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone, ethyl acetate, and acetic acid.
- Ethyl solvents such as butyl, isobutyl acetate, etc .
- Dalicol ether solvents such as diethylene glycol ethyl ether acetate, propylene glycol methyl ether acetate, 3-methyl-3-methoxybutyl acetate, ethyl-3 ethoxypropionate; tetrahydrofuran; Ether solvents such as dioxane and aprotic polar solvents such as N-methylpyrrolidone are used.
- the reaction raw material is added to the solvent so that the concentration of the reaction product in the reaction product solution becomes 30 to 80% by weight, and if necessary, 0.01 to 0.1% by weight based on the reaction raw material. % At 50-80 ° C in the presence of organotin-based catalyst!
- the charging ratio of the isocyanate conjugate to the specific (meth) acrylic compound and the other active hydrogen compound used in some cases is such that, based on 1 mol of the isocyanate group of the isocyanate conjugate, the specific (meth) acrylic acid capable of reacting therewith. It is preferable that the functional group of the compound and the other active hydrogen compound be 0.5 mol or more, particularly 1 mol or more.
- the reaction time is usually about 3 to 8 hours. It is preferable to track the content of isocyanate groups in the reaction product solution by force analysis and stop the reaction when this reaches the target value.
- the ionizing radiation-curable composition of the present invention is a reaction product of the thus-prepared isocyanate compound and a specific (meth) acrylic conjugate, and has a softening point of 40 ° C. Less than Use the above.
- the ionizing radiation-curable composition has a softening point of preferably 50 ° C. or higher, more preferably 60 ° C. or higher. If the softening point of the ionizing radiation-curable composition is lower than 40 ° C, blocking occurs in the coating film before curing, and the embossable moldability becomes poor.
- the softening point defined in the present invention means a value measured under the following conditions, excluding the reaction product solvent.
- Measurement mode Temperature dependence test of dynamic viscoelasticity, 25mm parallel plate Measurement temperature range: -50 to 150 ° C
- the temperature at which the melt viscosity is 5,000 Pa'sec when measured under the above conditions is defined as a softening point.
- the content of the olefinic double bond is measured by IR, NMR, or the like. If the force production process is known, it can also be obtained by calculation of the charged amount force.
- the coating liquid used in the present invention preferably contains, in addition to the above-mentioned components, a silicone conjugate to impart releasability to the surface of the ionizing radiation cured film.
- a silicone conjugate to impart releasability to the surface of the ionizing radiation cured film.
- a layer not containing the silicone conjugate may be provided.
- the silicon-derived silicon-containing ratio on the surface of the ionizing radiation-cured film is 5 to 30%, and is synthesized using release paper.
- the proportion of silicon derived from silicone on the surface of the ionizing radiation cured film is preferably 5% or more.
- “silicon-derived silicon abundance ratio” refers to the atomic% of silicon atoms among atoms for which surface force on release paper was detected by X-ray photoelectron spectroscopy (hereinafter referred to as XPS) analysis. (However, hydrogen Atoms are ignored).
- the release paper of the present invention By setting the content of silicon on the surface of the ionizing radiation-cured film to 5 to 30%, excellent peelability can be maintained even when used in the production of synthetic leather.
- the process of producing synthetic leather using the release paper of the present invention is repeated five times, if the proportion of silicon-derived silicon on the surface of the ionizing radiation-cured film is 5% or more, the release paper is repeated. It has been found that even when synthetic leather is manufactured using, the release property of the release paper can be sufficiently maintained.
- the content of the silicone compound in the coating liquid containing the ionizing radiation-curable composition is 20% by weight or less, preferably 0.5 to 20% by weight, and more preferably 11 to 15% by weight. If the silicone conjugate is more than 20% by weight, the coating film becomes sticky or the cost increases, and if it is less than 0.5% by weight, the effect of improving the releasability is not sufficient.
- the silicone conjugate used in the present invention may be reactive or non-reactive.
- Examples of the reactive silicone conjugate include (meth) atalyloyl-modified, vinyl-modified, amino-modified, mercapto-modified, epoxy-modified, carboxyl-modified, phenol-modified, and alcohol-modified silicone conjugates.
- Specific compounds include (meth) atalyloyl-modified silicones such as X-22-164B and X-22-164C (manufactured by Shin-Etsu Danigaku Kogyo Co., Ltd.), FM-0711, FM-0721, FM0725 ( XF40-A1987 (manufactured by Toshiba Silicone Co., Ltd.) as the modified silicone silicone, TSF4700, TSF4702, TSF4705 (manufactured by Toshiba Silicone Co., Ltd.), X-22-161AS, KF393, KF864 as the amino-modified silicone.
- X-22-164B and X-22-164C manufactured by Shin-Etsu Danigaku Kogyo Co., Ltd.
- FM-0711, FM-0721, FM0725 XF40-A1987 (manufactured by Toshiba Silicone Co., Ltd.) as the modified silicone silicone
- TSF4700, TSF4702, TSF4705 manufactured by Toshiba Silicon
- silicone compounds synthesized using reactive silicone include silicone-modified (meth) acrylic polymers using (meth) atalyloyl-modified silicone, silicone-modified (meth) atalylate, silicone-modified epoxy acrylate using epoxy-modified silicone, Silicone-modified urethane polymer using alcohol-modified silicone ⁇ ⁇ ⁇ ⁇ silicon-modified urethane acrylate. Among them, silicone-modified urethane acrylate is particularly preferred.
- non-reactive silicone conjugate examples include the above-mentioned silicone compounds having no reactive group.
- Specific compounds include dimethylpolysiloxanes such as TSF451, YF3800 (manufactured by Toshiba Silicone Co., Ltd.), KF96A (manufactured by Shin-Etsu-Danigaku Kogyo Co., Ltd.), SH200 (manufactured by Toray Dow Kojung Silicone Co., Ltd.) TSF433, TSF434 (manufactured by Toshiba Silicone), SH510, SH702 (manufactured by Toray 'Dowko Jung' Silicone), and polyether-modified silicones include TSF4440, TSF4445 (manufactured by Toshiba Silicone), KF-351, KF-353 ( SH-3746, SH3748 (manufactured by Dow Joung Silicone Toray), SS-2803, SS-2801 (manufactured by Nyker).
- silicone conjugates may be used alone or in combination of two or more, and may be both reactive and non-reactive.
- the silicone compound preferably has a ring structure such as an aromatic, alicyclic, or isocyanuric acid skeleton.
- the silicone conjugated product having a ring structure include a silicone conjugated product such as methylphenylsilicone having a fuel group introduced into a side chain, and a method of introducing a ring structure using a reactive silicone.
- a silicone compound obtained by copolymerizing (meth) atalyloyl-modified silicone and styrene to introduce a phenol group a silicone-modified urethane polymer, and a silicone-modified urethane acrylate.
- These silicone compounds having a ring structure may or may not have a reactive group.
- the pinhole force S is further reduced by providing two or more ionizing radiation cured film layers
- the release property can be improved by including the silicone conjugate on the uppermost layer surface, and the release property of the release paper can be improved even when synthetic leather is manufactured using repeated release paper. We can maintain enough.
- the layers other than the uppermost layer may not contain a silicone compound.
- the coating liquid used in the present invention contains, as an optional component, a film-forming resinous inorganic pigment or the like as an optional component in order to modify the curing properties of the reaction product in addition to the silicone resin. You may make it contain.
- the lowermost layer contains 0.5 to 50% by weight, particularly 110 to 10% by weight of the inorganic pigment.
- the inorganic pigment used for this include talc, kaolin, silica, calcium carbonate, barium sulfate, titanium oxide, zinc oxide, and the like.
- the lowermost layer disposed on the side of the support contains 0.5 to 50% by weight of the inorganic pigment
- the uppermost layer disposed on the side opposite to the side of the support contains 0.5 to 5% by weight of the silicone compound. It contains 20% by weight.
- the resin having film forming properties include metharyl resin, chlorinated polypropylene, epoxy resin, polyurethane resin, polyester resin, polybutyl alcohol, and polybutyl acetal. In addition, these resins having film forming properties may or may not have a reactive group.
- the reactive group examples include a (meth) atalyloyl group, a butyl group, an amino group, a mercapto group, an epoxy group, a carboxyl group, a phenol group, and a hydroxyl group.
- Metharyl resin is preferred from the viewpoint of adhesion to the substrate and film forming properties, but methacrylic resin with a glass transition temperature (Tg) of 40 ° C or higher is preferred from the viewpoint of embossing properties, and Tg is 50 °.
- the amount of the resin having a film forming property is usually 70% by weight or less, preferably 1 to 70% by weight, and more preferably 20 to 60% by weight as the content in the coating liquid. If the resin having film forming properties exceeds 70% by weight, that is, the ionizing radiation-curable composition is less than 30% by weight, the heat resistance after ionizing radiation curing becomes insufficient. By mixing an appropriate amount of a resin having film forming properties, there is an effect that adhesion to a substrate, film forming properties, and the like are improved.
- Examples of the reactive monomer include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, ethyl hexyl (meth) acrylate, stearyl ( (Meta) atarilate, lauryl (meth) atarilate, tridecyl (meth) atarilate, trimethylolpropane triatalylate, tris (atari mouth quichetyl) isocyanurate, pentaerythritol tetraatarylate, dipentaerythritol hexatalylate, etc. It is preferred to use
- the reactive oligomer it is preferable to use epoxy acrylate, urethane acrylate, polyester acrylate, polyether acrylate, or the like.
- Examples of the photopolymerization initiator include benzoinethyl ether, acetophenone, and jetoxyase.
- an appropriate solvent is added so as to obtain a viscosity that facilitates the application, and the application is performed.
- the solvent include aromatic hydrocarbon solvents such as toluene and xylene; ketone solvents such as methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone; ester solvents such as ethyl acetate, butyl acetate and isobutyl acetate; and diethylene glycol solvent.
- Solvents such as glycol ether ester solvents such as tyl ether acetate, propylene glycol methinoleate enole acetate, propylene glycol monomethyl enoate ether, 3-methyl-3-methoxybutyl acetate, ethyl-3-ethoxypropionate, tetrahydrofuran, dioxane, etc.
- aprotic polar solvents such as N-methylpyrrolidone.
- the ionizing radiation cured film constituting the release paper of the present invention is formed by applying and curing the above coating liquid.
- the coating liquid can be used after being diluted with 10 to 1000 parts by weight of a solvent with respect to 100 parts by weight of a solid content. By diluting the solvent, an appropriate viscosity can be applied to the coating, for example, 10-3000 mPa's at 25 ° C, and the silicone-bonded product can be transferred to the appropriate surface during the drying process.
- Coating methods for the coating liquid include direct gravure coating, reverse gravure coating, gravure offset coating, micro gravure coating, direct roll coating, reverse ronore coating, curtain coating, knife coating, air knife coating, no coating, die coating, and the like.
- a known method such as spray coating is used. After coating the paper substrate, the solvent is evaporated in a drying furnace to form a coating film.
- the coating liquid is 1 one 40GZm 2 in dry weight after solvent evaporation, preferably good embossability be applied so as to 5- 20gZ m 2 is obtained.
- the ionizing radiation cured film layer has two or more layers. As a result, the number of pinholes is further reduced.
- the lowermost ionizing radiation-curable film layer preferably contains 0.5 to 50% by weight, particularly 110 to 10% by weight of an inorganic pigment.
- the inorganic pigment talc, kaolin, silica, calcium carbonate, barium sulfate, titanium oxide, zinc oxide and the like can be preferably used.
- the ionizing radiation cured film layer may contain a silicone conjugate.
- the silicone conjugate may be contained only in the uppermost layer of the ionizing radiation cured film layer, or may be contained in each layer.
- the above coating solution is applied to a support, and the dried coating film is tack-free. Therefore, after drying, the whole paper substrate can be wound up without blocking, and the post-processing embossing is offline. Can be applied. Further, by appropriately setting the embossing roll temperature and the softening temperature of the coating liquid, it is possible to obtain good moldability without the coating liquid adhering to the embossing roll.
- a method of transferring and embossing a metal embossing roll having a concavo-convex pattern is generally used, but a belt-type or planographic-type press may be used.
- embossing roll there are two-sided embossing, in which the backup roll is a female type, and a one-sided embossing, which has no irregularities, in comparison with the male type of the embossing roll.
- the coating liquid is heated so that the temperature of the coating liquid is 50 to 150 ° C. This temperature is preferably higher than the softening point of the ionizing radiation-curable composition contained in the coating liquid and lower than the temperature at which the resin melts.
- the roll itself is usually heated by passing steam through the embossing roll, but a preheating method in which the coating solution is heated immediately before embossing is also possible.
- the softening point of the ionizing radiation-curable composition is, as described above, 40 ° C or more, preferably 50 ° C or more. is there. If the softening point is lower than 40 ° C, tack-free properties and moldability become insufficient.
- the curable coating film coated with the coating liquid is cured by irradiating the curable coating film with ultraviolet light or an electron beam from the side.
- Ultraviolet light sources include low-pressure mercury lamps, medium-pressure mercury lamps, high-pressure mercury lamps, metal nitride lamps, xenon lamps, and tungsten lamps. Which is used.
- As the electron beam irradiation method a scan Jung method, a curtain beam method, a broad beam method, or the like is used. An electron beam acceleration voltage of 50 to 300 kV is appropriate.
- FIG. 1 is a diagram showing an example of the production process of the release paper of the present invention.
- 1 is a drawer roll
- 2 is an embossing roll
- 3 is a backup roll
- 4 is a take-up roll
- 5 is a paper with a curable coating
- 6 is a paper with a curable coating with an emboss
- 7 is a release paper with an embossing Respectively.
- A represents an embossing step
- B represents an irradiation step of ionizing radiation.
- FIG. 2 shows a support of release paper for producing synthetic leather of the present invention.
- the support 11 of the embossed release paper for the production of the synthetic leather of the present invention also acts as the base paper 12 and the clay coat layer 13 formed thereon. Even if the base paper 12 is left at 230 ° C for 3 minutes, the bow I tensile strength is maintained at least 1 OkN / m in the longitudinal direction by the test method in accordance with JIS P8113, and the test method in accordance with JIS P8116. Neutral paper strength with heat resistance such that it is maintained at 500 mN or more in both the vertical and horizontal directions.
- the clay coat layer 13 formed on the base paper has a smoothness of 100 seconds or more according to a test method in accordance with JIS P8119, and is formed so as to absorb surface irregularities due to pulp fibers of the base paper.
- the release paper using the support of the present invention, has high heat resistance enough to withstand the temperature of 230 ° C. required for the production of vinyl chloride-based synthetic leather, and is used in the production of synthetic leather. It can withstand repeated use five or more times.
- the norp used for the base paper a mixture of softwood pulp (N material) and hardwood pulp (L material) can be suitably used in order to obtain necessary strength and smoothness.
- the mixing ratio of hardwood pulp (L material) is preferably 50 to 90% in order to enhance smoothness. If the mixing ratio of hardwood pulp (L material) is lower than 50%, the smoothness decreases, which is not preferable. On the other hand, if it is higher than 90%, the strength of the base paper decreases, which is not preferable.
- fillers, paper strength improvers, stabilizers and the like may be added to the pulp raw material.
- the base paper must be neutral paper in order to impart sufficient heat resistance to the release paper.
- Alkyl ketene dimer (AKD), alkenyl anhydride Succinic acid, and cationic polymers.
- alkyl ketene dimer is preferable because it is relatively stable.
- a sulfuric acid band is used as a fixing agent, the strength of the paper is significantly reduced at a high temperature of 200 ° C. or more, and therefore, the sulfuric acid band should not be used.
- the basis weight of the base paper is, the strength of the release paper products, synthetic leather processing workability, use durable repeated release paper, and from the viewpoint of Enbosuka ⁇ E suitability is preferably 100- 200gZm 2 . If the basis weight is lower than lOOgZm 2, curling or waving tend to occur during the production of synthetic leather. On the other hand, when the grammage is higher than 200 gZm 2 , the embossability is deteriorated, and the thickness of the release paper increases the winding diameter, thereby lowering the work efficiency.
- Base paper is manufactured by fourdrinier multi-cylinder paper machine, short net multi-cylinder paper machine, round net multi-cylinder paper machine, long net, short net combination multi-cylinder paper machine, and long net'circle net combination multi-cylinder paper machine , A fourdrinier paper machine or the like.
- the clay coat layer is composed of styrene'butadiene latex, butyl acetate latex, acrylic latex, starch, casein, etc. as a binder, and inorganic materials such as kaolin, calcium carbonate, talc, silica, titanium oxide, aluminum hydroxide, etc.
- the paint power including the pigment also increases.
- Clay coating on the base paper may be performed continuously in the paper making process, or may be performed in a separate process. Further, after coating with a paint, the surface smoothness can be enhanced by further passing through a calender roll.
- the base paper has a mixed pulp strength of hardwood pulp and softwood pulp having a mixing ratio of hardwood pulp (L material) of 50 to 90%, and 230 ° C. C, leave it for 3 minutes, and measure the bow I tensile strength using a measuring method in accordance with JIS P8113.
- a smooth ionizing radiation-curable resin layer can be formed on the clay coat layer.
- the surface morphology of the ionizing radiation-curable resin layer provided on the support is embossed, and then cured by irradiation with ionizing radiation. Not receive.
- FIG. 3 shows a release paper for producing synthetic leather formed using the support 11 of release paper for producing synthetic leather of the present invention.
- the release paper for producing synthetic leather of the present invention comprises a step of providing an uncured ionizing radiation-curable resin film on the clay coat layer of the support, and embossing the uncured ionizing radiation-curable resin film. After the step and the embossing step, it is obtained through a step of irradiating the ionizing radiation-curable resin film with ionizing radiation to cure the resin film.
- the embossed release paper for synthetic leather production of the present invention has high heat resistance to withstand the temperature of 230 ° C. required for the production of vinyl chloride-fiber synthetic leather, and is used in the synthetic leather production process. It can be used more than once.
- the release paper does not stretch during the transfer process, the release paper mold can be transferred with high transfer accuracy to a polyurethane resin for a skin layer of synthetic leather, a polychlorinated rubber, or the like.
- the base paper has a glossy surface because the base paper is not affected by the unevenness of the pulp fiber. Therefore, it is possible to obtain a release paper from which synthetic leather having a glossy texture can be produced.
- non-coated papers such as fine paper, kraft paper, glossy kraft paper, pure white roll paper, dallasin paper, cup base paper, and inorganic pigment coated Coated paper such as art paper, coated paper, cast-coated paper, etc. provided with a layer, and synthetic paper without using natural pulp can also be used.
- non-coated papers such as fine paper, kraft paper, glossy kraft paper, pure white roll paper, dallasin paper, cup base paper, and inorganic pigment coated Coated paper such as art paper, coated paper, cast-coated paper, etc. provided with a layer, and synthetic paper without using natural pulp
- neutral paper rather than acidic paper.
- Rosin-based size with sulfuric acid band as fixing agent for acidic paper
- Neutral sizing agents such as neutral rosin-based materials that do not use a sulfuric acid band as a fixing agent for neutral paper, agents, alkyl ketene dimer (AKD), and alkali succinic anhydride (ASA) Is used.
- the pulp is a mixed system of softwood pulp and hardwood pulp, and at least 20% of softwood pulp is used. It is preferable that the basis weight is 80 to 250 g / m 2 .
- Examples of the resin having a film forming property used for forming the filling layer include polybutyl alcohol, acrylic resin, styrene acrylic resin, cellulose derivative, polyester resin, polyurethane resin, melamine resin, There are alkyd resin, amino alkyd resin, polychloride vinyl resin and polychloride vinylidene resin, and these may be used as a mixture.
- Examples of the inorganic pigment to be added include talc, kaolin, silica, calcium carbonate, barium sulfate, titanium oxide, zinc oxide, and the like. It is blended so as to be a weight%. If the amount of the filler layer is 0.5 to 20 gZm 2, the sealing effect will not be exhibited if the amount is as small as possible, and if the amount is too large, the embossing property will be hindered.
- the filling material is applied by the same method as the coating liquid containing the ionizing radiation-curable resin composition described above.
- Synthetic leather manufactured using the above-mentioned embossed release paper has a silicone-derived silicon content of 20% or less on the surface from which the release paper is peeled.
- synthetic leather is produced by peeling the release paper, a certain amount of silicone compound migrated from the release paper is present on the surface of the synthetic leather obtained.
- the present inventors have confirmed this fact by XPS analysis of the release paper surface and the synthetic leather surface.
- the amount of the silicone-based conjugate (the silicone-based silicon-existing ratio) to which the release paper force has been transferred is, at most, the amount of the silicone-derived silicone on the release paper surface. It means that it becomes smaller than the silicon existence ratio.
- the present inventors have found that even when synthetic leather is manufactured using repeated release paper, the silicon-derived silicon-existing ratio on the surface from which the release paper is peeled is 20% or less. It is obtained.
- the silicon-derived silicon-existing ratio on the release surface of the synthetic leather is 20% or less. . Therefore, even when the release paper is repeatedly used, the excellent release property of the release paper is maintained.
- the method for producing synthetic leather according to the first aspect of the present invention comprises at least paper as a support, and an ionizing radiation cured film provided on the paper, and the cured film is embossed.
- the embossed release paper is used. This release paper will be described later.
- a polyurethane resin composition is applied on the embossed ionizing radiation cured film of the release paper, and dried by heating to form a skin layer.
- Polyurethane resin compositions include polyester aromatic isocyanate urethane, polyether aromatic isocyanate urethane, polycarbonate aromatic urethane, polyester aliphatic isocyanate urethane, polyether aliphatic urethane, and polycarbonate aliphatic urethane.
- a one-pack type of isocyanate urethane can be suitably used.
- the applied polyurethane resin is usually dried by heating at 90 to 140 ° C, depending on its composition.
- the release paper used in the present invention even when drying is performed at a high temperature of 150 to 250 ° C., the release paper is not deformed or the like. Can be good. In this way, a polyurethane resin layer serving as a skin layer of synthetic leather is formed on the release paper on which the embossing force has been applied.
- a base fabric is bonded onto the skin layer via an adhesive to form a synthetic leather layer.
- One-component polyurethane resin, two-component curing polyurethane resin, melamine resin, etc. can be used as the adhesive, but when strength is required, two-component curing polyurethane resin is preferably used. it can.
- Two-component curable polyurethane resins are based on polyester, polyester, and polycarbonate prepolymer diols as main ingredients, and aromatic prepolymer diols as curing agents. Alternatively, two liquids of an aliphatic diisocyanate are mixed and used at the time of use. This mixture is reacted and used as an adhesive.
- the lamination of the skin layer and the base fabric is preferably performed by hot lamination, which can be performed by either hot lamination or wet lamination.
- the one in which the skin layer and the base cloth are adhered via the adhesive in this way becomes synthetic leather.
- the release paper used in the present invention even when the PU resin is used as the skin layer, the release property is excellent, so that synthetic leather can be produced using the repeated release paper.
- the method for producing a synthetic leather according to the second aspect of the present invention uses the same release paper as described above, and the polyurethane resin composition is formed on the ionized radiation cured film on which the release paper is embossed.
- the material is applied and dried by heating to form a skin layer. This step is the same as in the first embodiment, and the description is omitted.
- a wet intermediate layer is laminated on the skin layer, and the above-mentioned skin layer and the wet intermediate layer are pressure-bonded by the release paper side heat roll.
- the one in which the skin layer and the wet intermediate layer are pressed together is synthetic leather.
- the pressing is performed using a hot roll, and the hot roll is preferably set to 110 to 190 ° C.
- the wet intermediate layer is formed by applying a solution obtained by dissolving a one-pack polyurethane resin in dimethylformamide (DMF) onto a base fabric, immersing the solution in water, and replacing the DMF with water to remove urethane. It is obtained by coagulation.
- a microporous layer is formed on the wet intermediate layer obtained by such a process. Therefore, by including this wet intermediate layer in synthetic leather, synthetic leather having a soft and voluminous feel can be obtained.
- the synthetic leather can be manufactured by cooling the part to be the synthetic leather (the skin layer and the intermediate synthetic leather layer are pressed) and then peeling off the release paper.
- the method for producing a synthetic leather according to the third aspect of the present invention uses the same release paper as described above, wherein the vinyl chloride resin composition is formed on the embossed ionizing radiation cured film of the release paper. The material is applied and dried by heating to form a skin layer.
- the vinyl chloride resin composition include a simple substance of vinyl chloride, and a polymer obtained by copolymerizing a vinyl chloride monomer with a monomer such as vinyl acetate, ethylene, propylene, and maleic ester.
- the vinyl chloride resin composition is prepared by adding a plasticizer such as a phthalate ester plasticizer or a fatty acid ester plasticizer to the above resin and paste-pasting the paste, and further adding the paste-preventing agent and the stabilizer to the paste. , Fillers, pigments and the like are used.
- a plasticizer such as a phthalate ester plasticizer or a fatty acid ester plasticizer
- the applied Shii-Dani Bul resin is hardened by heat drying at 200 to 250 ° C, usually depending on its composition.
- the release paper used in the present invention even if the drying is performed at a high temperature of 200 to 250 ° C, the release paper is not deformed or the like. Can be improved.
- an intermediate layer is formed by applying an effervescent Shiridani vinyl resin composition onto the skin layer made of the Shiridani vinyl resin and heating.
- an effervescent Shiridani bur resin composition a composition obtained by adding a foaming agent such as azodicarbonamide or dinitrosopentamethylenetetramine to a composition similar to that used for the skin layer can be used.
- the foamable Shiridani Bul resin is applied on the skin layer and dried by heating at 180 to 250 ° C, whereby the foamable Shiridani Bul resin is foamed and the intermediate layer is formed. It is formed.
- a base fabric is bonded via an adhesive to form a synthetic leather layer.
- the adhesive a two-component curing type polyurethane adhesive or the like can be suitably used.
- a base cloth is stuck thereon and the adhesive is dried and solidified, whereby the skin layer and the base cloth are stuck.
- the step of laminating the skin layer and the base fabric is usually performed by reacting the adhesive in an aging room at 40 to 70 ° C for 2 to 3 days. In this way, the synthetic leather is formed as the structure of the skin layer Z intermediate layer Z adhesive Z base fabric.
- the method for producing a synthetic leather according to the fourth aspect of the present invention uses the same release paper as described above, and the polyurethane resin composition is formed on the embossed ionized radiation cured film of the release paper.
- the material is applied and dried by heating to form a skin layer. This step is the same as in the first embodiment, and the description is omitted.
- an intermediate layer is formed by applying a foamable salt-forming vinyl resin composition onto the skin layer made of the polyurethane resin and heating.
- This intermediate layer is the same as above, and the description is omitted.
- a base fabric is bonded via an adhesive to form a synthetic leather layer. That is, what is formed as the structure of the skin layer Z intermediate layer Z adhesive Z base fabric becomes synthetic leather.
- the release paper is peeled from the synthetic leather to obtain a synthetic leather.
- the release paper used in the present invention by using the release paper used in the present invention, even in the case of producing a synthetic leather (semi-synthetic leather) combining PU and PVC, the release paper is repeatedly used because of excellent releasability. Can be used to produce synthetic leather.
- the reactor was equipped with a stirrer, reflux condenser, dropping funnel and thermometer.
- reaction product liquid power was 43 ° C., although the ethyl acetate was distilled off.
- a reactor equipped with a stirrer, a reflux condenser, a dropping funnel and a thermometer was charged with 256.67 g of methylethyl ketone and 110 g of isophorone diisocyanate trimer, and the mixture was heated to 80 ° C. and dissolved.
- a reactor equipped with a stirrer, a reflux condenser, a dropping funnel and a thermometer was charged with 256.67 g of methylethyl ketone and 110 g of a trimer of isophorone diisocyanate, and the mixture was heated to 80 ° C. and dissolved. After air was blown into the solution, 0.20 g of hydroquinone monomethyl ether, 146.65 g of a mixture of pentaerythritol tetraatalylate and pentaerythritol triatalylate, and epoxy acrylate (Epoxyester 70PA, manufactured by Kyoeisha-Iridgei Co., Ltd.) 30.
- a reactor equipped with a stirrer, reflux condenser, dropping funnel and thermometer was charged with 256.67 g of methylethyl ketone and 110 g of isophorone diisocyanate (VESTANAT IPDI, manufactured by degussa), and heated to 80 ° C to dissolve. I let it. After injecting air into the solution, 0.40 g of nitroquinone monomethyl ether, pentaerythritol tetraaphthalate and pentane 448.53 g of a mixture of erythritol triatalylate and 0.40 g of dibutyltin dilaurate were charged. After reacting at 80 ° C.
- reaction product liquid was also a viscous liquid when methyl ethyl ketone was distilled off, and its softening temperature could not be measured.
- a mixture of dipentaerythritol hexaatalylate and dipentaerythritol pentaatalylate was used as it was.
- a reactor equipped with a stirrer, reflux condenser, dropping funnel and thermometer was charged with 4-hydroxyethyl methacrylate 5g, isobornyl methacrylate 20g, methyl methacrylate 75g, methylethyl ketone 200g, 2, 2, 0.5 g of —azobis (2,4-dimethylethole-tolyl) was added, and polymerization was carried out at 65 ° C. for 6 hours.
- Resin c Commercially available methacrylate resin (Kuraray clay, Norappet GF)
- a reactor equipped with a stirrer, reflux condenser, dropping funnel and thermometer was charged with 23.3 g of methylethyl ketone and 10 g of isophorone diisocyanate, 20.4 g of a mixture of pentaerythritol tetraatalylate and pentaerythritol triatalylate, and dibutyl.
- the acrylic ⁇ the following composition silica-containing coating film thickness after drying barcode one coater is 5 g / m 2 Coated as follows. After coating, it was dried at 110 ° C for 1 minute.
- Styrene Acryl emulsion (X-436, manufactured by Seiko Polymer Co., Ltd.) 25 parts by weight Water-soluble acrylic resin (PDX-6102, manufactured by Johnson Polymer Co., Ltd.) 25 parts by weight Silica (Fuji Silicon Chemicals Co., Cysilia 350) 10 parts by weight Parts isopropyl alcohol 25 parts by weight
- composition 1 30 parts by weight of the ionizing radiation-curable composition A, 60 parts by weight of a resin b having film-forming properties, and 10 parts by weight of the silicone resin conjugate ex (all parts by weight are solid parts by weight).
- Composition 1 was prepared by mixing. A portion of the composition was sampled and the softening temperature was measured.
- the composition 2-9 was prepared by mixing at the mixing ratio (parts by weight of solid content) shown in Table 1 below.
- the inorganic pigment used was silica (Sycilia 350, manufactured by Fuji Silicon Chemicals, Inc.). A part of the composition was sampled and the softening temperature was measured. The results are also shown in Table 1.
- Coating liquid parts by weight of solid content
- Coating composition Ionizing radiation t-curing 'raw composition
- Resin Silicone compound Softening of liquid Inorganic content
- a photopolymerization initiator (Irgacure 907, manufactured by Chivas Be Charity Chemicals Co., Ltd.) and 100 parts by weight of solid content of methyl ethyl ketone as a diluting solvent were used for 100 parts by weight of the solid content of the composition. %.
- the obtained mixture is coated on a neutral paper without a filling layer with a bar coater, and the coated film is dried to a thickness of about 5 to 10 g Zm 2 at 110 ° C. Heated and dried for 1 minute.
- the surface of the coating film was embossed.
- the embossing was performed by pressing a metal embossing roll having an uneven pattern with a paper roll having a female mold as a backup roll.
- the embossing roll temperature was set to 120 ° C, embossing was performed on the support and the dried coating film at the same time, and a good mold was put on the back surface side of the support which was not only the dried coating film surface, It was confirmed that irregularities were sufficiently formed not only on the coating surface but also on the back side of the paper.
- compositions shown in the first column of Table 2 were applied to a support (neutral paper with or without a filler layer) shown in Table 2 below and dried in the same manner as described above. After drying, each of the compositions shown in the second layer column of Table 2 was coated and dried in the same manner. Thereafter, embossing was performed in the same manner as above.
- the unevenness of the release paper on which the embossing corresponding to the embossing roll specific portion was formed was measured using a three-dimensional surface roughness measuring instrument, and evaluated according to the following criteria.
- Ra and Rz are both 70% or more of the emboss roll value, and either is 85% or more
- Blowing agent (azodicarbonamide) 3 parts by weight
- One-component curable polyurethane of the following composition was dried on a surface of the release paper with a bar coater, coated with 20 gZm 2, and dried by heating at 120 ° C. for 2 minutes.
- Base agent (Dainippon Ink, CRISVON, 7367SL) 100 parts by weight
- a two-component curable urethane adhesive having the following composition was dried with a bar coater, applied so as to have a thickness of 20 gZm2, and a back skin was stuck thereon. Bonding The composition was heat-cured and aged at 50 ° C for 24 hours to form a PU leather sheet.
- main agent Daishimoto Ink Co., Ltd., CRISVON, 4070
- curing agent (Dainippon Ink Co., Ltd., CRISVON, NX)
- a tensile tester (Tensilon RT manufactured by Orientec Co., Ltd.) was applied to the obtained PU leather sheet.
- Peeling was performed at 0 degree, and the peel strength was measured. This was repeated five times, and the peelability was evaluated based on the following criteria.
- the peeling strength is less than 1N and the peeling property hardly changes until the 5th time.
- the release paper No. 16 (Example No. 16) had good embossing moldability, heat resistance, and repeat peelability.
- release paper 7 Comparative Example 1
- the emboss moldability was poor due to the low softening temperature of the coating material.
- the release paper 8 (Comparative Example 2) has poor emboss moldability.
- the release paper 9 (Comparative Example 3), although the coating material had a high softening temperature, the heat resistance was poor.
- composition 10 30 parts by weight of the ionizing radiation-curable composition A, 60 parts by weight of the resin b having film forming properties, and 10 parts by weight of the silicone resin conjugate ⁇ (the above-mentioned parts by weight are solid parts by weight).
- Composition 10 was prepared by mixing. A portion of the composition was sampled and the softening temperature was measured to be 76 ° C.
- composition 11 80 parts by weight of the ionizing radiation-curable composition C, 10 parts by weight of a resin b having film-forming properties, and 10 parts by weight of the silicone conjugate oc (the above-mentioned parts by weight are
- the composition 11 was also prepared by mixing A portion of the composition was sampled and the softening temperature was measured to be 75 ° C.
- a photopolymerization initiator (Cirvas 907, Irgacure 907) per 100 parts by weight of the solid content of the composition, and methyl ethyl ketone as a diluting solvent having a solid concentration of 30 parts by weight were used. %.
- the obtained mixture is coated on a neutral paper without a sealing layer with a bar coater, and the coated film is dried to a thickness of about 5 to 10 gZm 2 after drying. And dried by heating for 1 minute.
- a photopolymerization initiator (Irgacure 907, manufactured by Chinoku Specialty Chemicals Co., Ltd.) was added to 100 parts by weight of the solid content of the composition 11, and methyl ethyl ketone was used as a diluting solvent in a solid content concentration of 3 parts. It was added so as to be 30% by weight.
- the obtained mixture was applied on a coating film composed of the above composition 10 in the same manner as described above, and was heated and dried by evaporation.
- an embossing force was applied to the surface of the coating film.
- the embossing was performed by pressing a metal embossing roll having an uneven pattern with a paper roll having a female mold as a backup roll.
- the embossing roll temperature was set to 120 ° C, embossing was performed on the support and the dried coating film at the same time, and a good mold was put on the back surface side of the support which was not only the dried coating film surface. It was confirmed that irregularities were sufficiently formed not only on the coating surface but also on the back side of the paper.
- a high-pressure mercury lamp with an output 120WZcm used ⁇ to cure the row ,, coating the ultraviolet irradiation 600MjZcm 2, to obtain a release paper.
- Example 7 (1st method of reporting synthetic leather of the first type)
- the following components were mixed as a coating solution for forming a skin layer, and the mixture was sufficiently stirred with a propeller mixer to prepare a mixture of an ester-based polyurethane resin composition.
- Methyl ethyl ketone 20 parts by weight
- the prepared ester-based polyurethane solution was applied on the release paper obtained above with a knife coater so as to have a dry thickness of 20 ⁇ m, and was dried with hot air at 100 ° C for 2 minutes to form a polyurethane skin layer. did.
- a two-component curable polyester-based polyurethane adhesive 1 having the following composition was applied on the polyurethane skin layer with a knife coater so as to have a dry thickness of 0, and a knitted fabric was adhered.
- Example 8 (1st method of reporting synthetic leather of the second type) The following components were mixed as a coating solution for forming a skin layer, and the mixture was sufficiently stirred with a propeller mixer to prepare a mixture of an ester-based polyurethane resin composition.
- Methyl ethyl ketone 20 parts by weight
- the adjusted ester-based polyurethane solution was applied to the release paper obtained above so as to have a dry thickness with a knife coater, and dried with hot air at 100 ° C. for 2 minutes to form a polyurethane skin layer.
- a wet synthetic leather intermediate layer for forming an intermediate layer was prepared.
- the following components were mixed as a resin for forming a wet synthetic leather intermediate layer, and the mixture was sufficiently stirred with a propeller mixer to prepare a mixture of an ester-based polyurethane resin composition.
- Emulsion polymerized polyvinyl alcohol (average degree of polymerization 1000)
- the above sol-like mixture is applied to the release paper obtained above by a doctor knife method so as to have a dry thickness of 300 m, and is dried with hot air at 150 ° C for 90 seconds and at 195 ° C for 3 minutes and 30 seconds. Then, a PVC skin layer was formed.
- the following components were mixed as a coating solution for forming a skin layer, and the mixture was sufficiently stirred with a propeller mixer to prepare a mixture of an ester-based polyurethane resin composition.
- the prepared ester-based polyurethane solution was applied on the release paper obtained above so as to have a dry thickness of m using a knife coater, and dried with hot air at 100 ° C. for 2 minutes to form a polyurethane skin layer.
- Emulsion-polymerized polychlorinated vinyl resin (copolymerized epoxy group-containing monomer, average polymerization degree 1500)
- the above foamable PVC coating solution is applied on the polyurethane skin layer obtained above by a doctor knife method so as to have a dry thickness of 30.Then, 150 ° C for 90 seconds, and 195 ° C for 3 minutes 30 It was dried with hot air for 2 seconds to form a foamed PVC layer.
- the production of each synthetic leather was repeated five times using the same release paper, and the release paper was deformed, the support was deteriorated, and the release property of the release paper was evaluated.
- the release of the release paper was evaluated according to the following criteria.
- Methyl ethyl ketone 15 parts by weight Methyl ethyl ketone 15 parts by weight Dimethyl formamide 10 parts by weight
- the adjusted ester-based polyurethane solution was applied on a release paper used in Example 7 with a knife coater so as to have a dry thickness of 20 m, and was dried with hot air at 100 ° C for 2 minutes to form a polyurethane skin layer. .
- a two-component curable polyester-based polyurethane adhesive 1 having the following composition was applied with a knife coater on the polyurethane skin layer so as to have a dry thickness of 0, and a knitted fabric was adhered.
- the bonded product was dried with hot air at 100 ° C. for 5 minutes, and aged for 48 hours to react and solidify the adhesive. Then, in order to evaluate the suitability of the release paper for repeated use, when producing the dry PU leather by peeling it from the release paper, (1) the peel strength of the release paper and the leather, and (2) the surface of the release paper after peeling And the proportion of silicone present on the synthetic leather surface was measured. This operation was performed five times, and changes due to repeated use were confirmed.
- the release rate of the silicone-derived silicon in the release paper before the production of the synthetic leather and the synthetic leather produced as described above using the release paper was measured. The measurement is as follows I went.
- XPS X-ray photoelectron spectrometer
- Non-monochromatic A1-- ⁇ rays were used as the X-rays (output 300W), and the photoelectron capture angle was:
- the sample was set at 90 degrees, the silicon surface analysis of the release paper and the synthetic leather was performed, and the amount of silicon-derived silicon present on the surface was measured.
- the processing conditions for the knock ground in the measurement results were performed by the Shirley method. Further, in the same manner as above, using the same release paper, synthetic leather was repeatedly produced in the same manner as in the above example, the synthetic leather and the release paper were peeled off, and the respective silicon abundances were measured. The results were as shown in Table 5 below.
- the slurry was used to make a base paper having a basis weight of 140 g / m 2 using a long net / short net combination multi-cylinder paper machine. Thereafter, a clay coat layer of 9 gZm 2 was formed on the base paper by an air knife coater continuously from the papermaking process, and further smoothed through a calender roll to prepare a base paper having a clay coat layer.
- the surface smoothness was measured by using a measuring method based on JIS P8119 (using a digital Beck smoothness measuring device manufactured by Toyo Seiki Co., Ltd.). Measurement of tensile strength by a test method based on JIS P8113 (Tensilon RTC-1310A manufactured by Lientech Co., Ltd.) and tear strength measurement by a test method based on JIS P8116 (using an Elemendorf Bow I tearing tester manufactured by Tester Sangyo Co., Ltd.) were performed under the following conditions.
- the smoothness was 153.8 seconds.
- the longitudinal tensile strength ( kNZm) was 13.4 kNZm and more than 10 kNZm
- the tear strength (mN) was 627 mN in the vertical direction and 627 mN in the horizontal direction, which was 500 mN or more in both the vertical and horizontal directions.
- the coating liquid was applied to the base paper having the clay coat layer prepared as described above to prepare a coated base material.
- the coating liquid was an ultraviolet curable resin (used in Example 1 above).
- the above-mentioned coated base material was passed through a mirror-finished calender roll (manufactured by Yuri Roll Co., Ltd.), and the mirror surface of the calender roll was transferred to the surface of the ultraviolet curable resin layer to examine the transferability.
- the surface of the calender roll at 110 ° C is brought into contact with the UV curable resin surface of the coating substrate, and a linear pressure of 100 kN / m is applied between the impression cylinder and the calender roll for transfer. Thereafter, the transfer surface was irradiated with an ultraviolet ray of 600 mJ Zcm 2 using a high-pressure mercury lamp (output: 120 WZcm) to solidify the ultraviolet-curable resin.
- the 60 ° specular gloss (Gs (60 °)) of the transfer surface was measured using a digital variable-angle gloss meter (manufactured by Suga Test Instruments Co., Ltd.). The transferability was evaluated.
- L-material 80% Al-ketene dimer as a neutral sizing agent was added to a pulp slurry containing bleached kraft pulp in which L-material and N-material were mixed with 0.1% of pulp by 0.1% based on the amount of pulp. .
- the slurry was used to make base paper having a basis weight of 140 gZm 2 using a long net / short net combination multi-cylinder paper machine. Thereafter, a clay coat layer of 18 gZm 2 was formed on the base paper by a blade coater and an air knife coater, and the smoothness was imparted through a single calender to produce a base paper having a clay coat layer. .
- An evaluation substrate was formed in the same manner as in Example 14 using the base paper having the clay coat layer prepared as described above.
- the obtained evaluation base material was treated in the same manner as in Example 14 to obtain a 60 ° specular gloss (Gs (6 0 °;)) and the transferability and the heat resistance were evaluated.
- L material 20% of N material was added to kneaded pulp slurry containing bleached kraft pulp in which L material and N material were mixed. 0.1% of alkyl ketene dimer was added as a neutral sizing agent to the pulp amount. The slurry was used to make a base paper having a basis weight of 140 gZm 2 using a long net / short net combination multi-cylinder paper machine to prepare a base paper having no clay coat layer.
- the obtained evaluation base material was measured for 60 ° specular gloss (G s (60 °;)) of the transfer surface, and evaluated for transferability and heat resistance in the same manner as in Example 14.
- a rosin-based sizing agent and a sulfuric acid band as a fixing agent were added to a kneaded slurry containing bleached kraft pulp in which L material and N material were mixed with 80% L material and 20% N material.
- a base paper having a basis weight of 140 g / m 2 was formed from the slurry using a long and short net combination multi-cylinder paper machine. After that, a 9 g Zm 2 clay coating layer is formed on the base paper by an air knife coater continuously with the paper making process, and further, smoothness is imparted through a calender roll to form a clay coating layer.
- a base paper was prepared.
- An evaluation substrate was formed in the same manner as in Example 14 using the base paper having the clay coat layer prepared as described above.
- the obtained evaluation base material was measured for 60 ° specular gloss (Gs (60 °;)) of the transfer surface, and evaluated for transferability and heat resistance in the same manner as in Example 14.
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Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04807713.5A EP1702752B1 (en) | 2003-12-26 | 2004-12-24 | Embossed release paper for production of synthetic leather, support thereof, synthetic leather utilizing the release paper and process for producing the same |
KR1020067013127A KR101210414B1 (ko) | 2003-12-26 | 2004-12-24 | 합성 피혁 제조용 엠보싱 이형지와 그의 지지체, 및 그의 이형지를 이용한 합성 피혁과 그의 제조 방법 |
US10/584,648 US20070116929A1 (en) | 2003-12-26 | 2004-12-24 | Embossed release paper for synthetic leather production and support therefor, and synthetic leather using the release paper and process for producing the synthetic leather |
HK07105916.3A HK1100771A1 (en) | 2003-12-26 | 2007-06-05 | Embossed release paper for production of synthetic leather, support thereof, synthetic leather utilizing the release paper and process for producing the same |
Applications Claiming Priority (8)
Application Number | Priority Date | Filing Date | Title |
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JP2003432621A JP4447310B2 (ja) | 2003-12-26 | 2003-12-26 | エンボス付き離型紙及びその製造方法 |
JP2003-432621 | 2003-12-26 | ||
JP2004-177446 | 2004-06-15 | ||
JP2004177446A JP4839580B2 (ja) | 2004-06-15 | 2004-06-15 | 合成皮革製造用エンボス付き離型紙の支持体及び合成皮革製造用エンボス付き離型紙 |
JP2004371430A JP4537844B2 (ja) | 2004-12-22 | 2004-12-22 | エンボス付き離型紙及びそれを用いた合成皮革 |
JP2004-371162 | 2004-12-22 | ||
JP2004-371430 | 2004-12-22 | ||
JP2004371162A JP4451300B2 (ja) | 2004-12-22 | 2004-12-22 | 離型紙を用いた合成皮革の製造方法 |
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WO2005065937A1 true WO2005065937A1 (ja) | 2005-07-21 |
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PCT/JP2004/019356 WO2005065937A1 (ja) | 2003-12-26 | 2004-12-24 | 合成皮革製造用エンボス付き離型紙及びその支持体、ならびにその離型紙を用いた合成皮革及びその製造方法 |
Country Status (6)
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US (1) | US20070116929A1 (ja) |
EP (1) | EP1702752B1 (ja) |
KR (1) | KR101210414B1 (ja) |
HK (1) | HK1100771A1 (ja) |
TW (1) | TWI381938B (ja) |
WO (1) | WO2005065937A1 (ja) |
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JP2007092196A (ja) * | 2005-09-27 | 2007-04-12 | Dainippon Printing Co Ltd | エンボス加工用離型紙 |
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KR100885793B1 (ko) * | 2006-12-28 | 2009-02-26 | 제일모직주식회사 | 비닐기를 함유한 아크릴계 점착수지 조성물, 이를 포함하는광경화형 점착조성물 및 이를 포함하는 점착테이프 |
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CN101952380B (zh) * | 2008-03-31 | 2013-03-20 | 日立化成高分子株式会社 | 剥离剂组合物和剥离材 |
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CN101378900B (zh) * | 2006-02-07 | 2013-05-29 | 大日本印刷株式会社 | 压纹脱模片的原片、压纹脱模片、压纹脱模片的原片的制造方法、压纹脱模片的制造方法、压纹脱模片的制造装置、合成皮革及合成皮革的制造方法 |
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WO2011094930A1 (en) * | 2010-02-02 | 2011-08-11 | Lintec Corporation | Release sheet, synthetic leather and manufacturing method thereof |
US10815613B2 (en) | 2016-10-19 | 2020-10-27 | Hyundai Motor Company | Artificial leather with three-dimensional pattern and manufacturing method thereof |
JPWO2021084923A1 (ja) * | 2019-10-28 | 2021-12-09 | Dic株式会社 | ウレタン樹脂組成物、合成皮革、及び、合成皮革の製造方法 |
US20210310185A1 (en) * | 2020-04-04 | 2021-10-07 | von Holzhausen | Biodegradable synthetic leather produced from recycled material |
Also Published As
Publication number | Publication date |
---|---|
EP1702752A4 (en) | 2008-06-25 |
EP1702752A1 (en) | 2006-09-20 |
KR20060121258A (ko) | 2006-11-28 |
KR101210414B1 (ko) | 2012-12-10 |
TW200536711A (en) | 2005-11-16 |
US20070116929A1 (en) | 2007-05-24 |
EP1702752B1 (en) | 2013-07-17 |
HK1100771A1 (en) | 2007-09-28 |
TWI381938B (zh) | 2013-01-11 |
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