WO2015114891A1 - 塗布フィルム - Google Patents
塗布フィルム Download PDFInfo
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- WO2015114891A1 WO2015114891A1 PCT/JP2014/077791 JP2014077791W WO2015114891A1 WO 2015114891 A1 WO2015114891 A1 WO 2015114891A1 JP 2014077791 W JP2014077791 W JP 2014077791W WO 2015114891 A1 WO2015114891 A1 WO 2015114891A1
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- alkyl group
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/044—Forming conductive coatings; Forming coatings having anti-static properties
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
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- 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
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- 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
- B32B27/16—Layered products comprising a layer of synthetic resin specially treated, e.g. irradiated
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- 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
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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- 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
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
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- 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
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/08—Homopolymers or copolymers of acrylic acid esters
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- 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D133/062—Copolymers with monomers not covered by C09D133/06
- C09D133/066—Copolymers with monomers not covered by C09D133/06 containing -OH groups
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- 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
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- 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/24—Homopolymers or copolymers of amides or imides
- C09D133/26—Homopolymers or copolymers of acrylamide or methacrylamide
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- 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
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
- B32B2250/244—All polymers belonging to those covered by group B32B27/36
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- 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
- B32B2255/00—Coating on the layer surface
- B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
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- 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
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
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- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/21—Anti-static
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- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
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- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/748—Releasability
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- 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
- B32B2571/00—Protective equipment
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2429/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2429/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2429/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2433/24—Homopolymers or copolymers of amides or imides
- C08J2433/26—Homopolymers or copolymers of acrylamide or methacrylamide
Definitions
- the present invention relates to a polyester film suitable as a release film, and is used in various processes such as transfer for molding simultaneous transfer, for manufacturing flexible printed wiring boards, for process paper for manufacturing plastic sheets, etc.
- the present invention relates to a transparent release polyester film that is used as a protective film such as a process film and a cover tape, and that suppresses generation of static electricity during the process and peeling, and prevents adhesion of dust and small dust.
- polyester films represented by polyethylene terephthalate and polyethylene naphthalate have excellent mechanical properties, dimensional stability, flatness, heat resistance, chemical resistance, optical properties, etc., and cost performance. It is used for various purposes.
- a polyester film is used as a release film, it has a drawback of poor practicality because of its insufficient release properties for various resins and adhesives.
- a method for laminating a releasable coating film on the surface of a polyester film has been studied.
- Patent Documents 1 and 2 a method of applying and laminating a long chain alkyl group-containing resin on a polyester film surface
- Polyester film is prone to static electricity due to contact friction and peeling during processing and product use, and dust and small dust are likely to adhere to it. Therefore, there is a risk of contamination in the process and mixing of foreign substances. In addition, there is a problem that the film supply and discharge suitability deteriorates during processing, such as double sheet taking and slipping failure. Therefore, a method for applying and laminating an antistatic agent on the surface of the polyester film (Patent Document 3) and the like have been proposed for applications in which foreign matter mixing and charging are not desired.
- the releasable coating and the antistatic coating may be processed as separate coatings, but from the viewpoint of increasing the production process, the release coating and antistatic properties should be imparted with the same coating. Is preferred.
- the releasability and antistatic property cannot be obtained well or the appearance of the coating film is deteriorated.
- a film with a deteriorated appearance may have unevenness in releasability and antistatic properties due to unevenness of the coating film, and lack in stability of performance. Further, the visibility of the product viewed through the release film is deteriorated, and there is a possibility that a defect of the product is overlooked in the process inspection.
- An object of the present invention is to provide a coated film excellent in transparency that suppresses generation of static electricity and has suitable releasability as a protective film such as a process film or a cover tape.
- the gist of the present invention is that a coating layer formed from a coating solution containing a release agent and an antistatic agent composed of a long-chain alkyl group-containing compound and an acrylic resin or polyvinyl alcohol on at least one surface of a polyester film. It exists in the coating film characterized by having.
- the coated film of the present invention when used as a film for various processes such as transfer for molding simultaneous transfer, it is possible to provide a release polyester film which is excellent in releasability and transparency and has little charge. Yes, its industrial value is high.
- the polyester film constituting the coated film of the present invention may have a single layer structure or a multilayer structure, and may have four or more layers as long as the gist of the present invention is not exceeded other than the two-layer or three-layer structure. It may be a multilayer and is not particularly limited.
- the polyester may be a homopolyester or a copolyester.
- a homopolyester those obtained by polycondensation of an aromatic dicarboxylic acid and an aliphatic glycol are preferred.
- the aromatic dicarboxylic acid include terephthalic acid and 2,6-naphthalenedicarboxylic acid
- examples of the aliphatic glycol include ethylene glycol, diethylene glycol, and 1,4-cyclohexanedimethanol.
- Typical polyester includes polyethylene terephthalate and the like.
- examples of the dicarboxylic acid component of the copolyester include isophthalic acid, phthalic acid, terephthalic acid, 2,6-naphthalenedicarboxylic acid, adipic acid, sebacic acid, and oxycarboxylic acid (for example, p-oxybenzoic acid).
- examples of the glycol component include one or more types such as ethylene glycol, diethylene glycol, propylene glycol, butanediol, 4-cyclohexanedimethanol, neopentyl glycol and the like.
- the polymerization catalyst for polyester is not particularly limited, and conventionally known compounds can be used. Examples thereof include antimony compounds, titanium compounds, germanium compounds, manganese compounds, aluminum compounds, magnesium compounds, calcium compounds and the like.
- particles can be blended mainly for the purpose of imparting slipperiness and preventing the occurrence of scratches in each step.
- the kind of the particles to be blended is not particularly limited as long as it is a particle capable of imparting slipperiness, and specific examples thereof include, for example, silica, calcium carbonate, magnesium carbonate, barium carbonate, sulfuric acid.
- examples thereof include inorganic particles such as calcium, calcium phosphate, magnesium phosphate, kaolin, aluminum oxide, and titanium oxide, and organic particles such as acrylic resin, styrene resin, urea resin, phenol resin, epoxy resin, and benzoguanamine resin.
- precipitated particles obtained by precipitating and finely dispersing a part of a metal compound such as a catalyst during the polyester production process can also be used.
- the shape of the particles to be used is not particularly limited, and any of a spherical shape, a block shape, a rod shape, a flat shape, and the like may be used. Moreover, there is no restriction
- the average particle diameter of the particles is usually 5 ⁇ m or less, preferably in the range of 0.1 to 3 ⁇ m. When the average particle size exceeds 5 ⁇ m, the surface roughness of the film becomes too rough. For example, when used for transfer, the surface shape of the molding surface to be transferred may be affected.
- the particle content in the polyester is usually 5% by weight or less, preferably in the range of 0.0003 to 3% by weight. When the particle content exceeds 5% by weight, the transparency of the film may be insufficient.
- the method for adding particles to the polyester is not particularly limited, and a conventionally known method can be adopted.
- it can be added at any stage for producing the polyester constituting each layer, but it is preferably added after completion of esterification or transesterification.
- antioxidants In addition to the above-mentioned particles, conventionally known antioxidants, antistatic agents, heat stabilizers, lubricants, dyes, pigments and the like can be added to the polyester as necessary.
- the thickness of the polyester film is not particularly limited as long as it can be formed into a film, but it is usually 5 to 300 ⁇ m, preferably 10 to 150 ⁇ m from the viewpoint of mechanical strength, handling property and productivity. The range is good.
- the film forming method a generally known film forming method can be adopted, and there is no particular limitation.
- the polyester raw material described above is melt-extruded from a die using an extruder, and the molten sheet is cooled and solidified with a cooling roll to obtain an unstretched sheet.
- a cooling roll in order to improve the flatness of the sheet, it is preferable to improve the adhesion between the sheet and the rotary cooling drum, and an electrostatic application adhesion method or a liquid application adhesion method is preferably employed.
- the obtained unstretched sheet is stretched in one direction by a roll or a tenter type stretching machine.
- the stretching temperature is usually 70 to 120 ° C., preferably 80 to 110 ° C., and the stretching ratio is usually 2.5 to 7 times, preferably 3.0 to 6 times.
- the film is stretched in a direction perpendicular to the first-stage stretching direction, usually at 70 to 170 ° C., and at a stretching ratio of usually 2.5 to 7 times, preferably 3.0 to 6 times.
- heat treatment is performed at a temperature of 180 to 270 ° C. under tension or under relaxation within 30% to obtain a biaxially oriented film.
- a method in which stretching in one direction is performed in two or more stages can be employed. In that case, it is preferable to carry out so that the draw ratios in the two directions finally fall within the above ranges.
- the simultaneous biaxial stretching method is a method in which the aforementioned unstretched sheet is stretched and oriented simultaneously in the machine direction and the width direction in a state where the temperature is normally controlled at 70 to 120 ° C., preferably 80 to 110 ° C. Is 4 to 50 times, preferably 7 to 35 times, and more preferably 10 to 25 times in terms of area magnification. Subsequently, heat treatment is performed at a temperature of 170 to 270 ° C. under tension or relaxation within 30% to obtain a stretched oriented film.
- a conventionally known stretching method such as a screw method, a pantograph method, or a linear driving method can be employed.
- a coating layer constituting the coating film of the present invention will be described.
- the coating layer it may be provided by in-line coating which treats the film surface during the process of forming a polyester film, or offline coating which is applied outside the system on a once produced film may be adopted. More preferably, it is formed by in-line coating.
- In-line coating is a method of coating in the process of manufacturing a polyester film, and specifically, a method of coating at an arbitrary stage from melt-extrusion of polyester to heat-fixing and winding after stretching. Usually, it is coated on any of an unstretched sheet obtained by melting and quenching, a stretched uniaxially stretched film, a biaxially stretched film before heat setting, and a film after heat setting and before winding.
- an unstretched sheet obtained by melting and quenching, a stretched uniaxially stretched film, a biaxially stretched film before heat setting, and a film after heat setting and before winding.
- a method of stretching in the transverse direction after coating a uniaxially stretched film stretched in the longitudinal direction (longitudinal direction) is particularly excellent. According to such a method, film formation and coating layer formation can be performed at the same time, so there is an advantage in manufacturing cost.
- the thickness of the coating layer can be changed by the stretching ratio. Compared to offline coating, thin film coating can be performed more easily. Further, by providing the coating layer on the film before stretching, the coating layer can be stretched together with the base film, whereby the coating layer can be firmly adhered to the base film. Furthermore, in the production of a biaxially stretched polyester film, the film can be restrained in the longitudinal and lateral directions by stretching while gripping the film end with a clip, etc. High temperature can be applied while maintaining the properties. Therefore, since the heat treatment performed after coating can be performed at a high temperature that cannot be achieved by other methods, the film forming property of the coating layer can be improved, and the coating layer and the base film can be more firmly adhered to each other. Furthermore, the coating layer can be made strong, preventing the coating layer from dropping off, and improving the mold release performance and antistatic performance.
- the coated film of the present invention has an essential requirement to have a coating layer formed from a coating solution containing a release agent and an antistatic agent composed of a long-chain alkyl group-containing compound and an acrylic resin or polyvinyl alcohol. Is.
- the coating layer in the present invention is a protective film such as process film or cover tape used in various processes, for example, for transfer such as simultaneous molding transfer, for manufacturing flexible printed wiring boards, for process paper for manufacturing plastic sheets, etc. It is provided in order to improve the release performance and prevent charging.
- the long-chain alkyl group-containing compound used for forming the coating layer is used as a release agent for improving the release property of the film.
- the long-chain alkyl group-containing compound is a compound having a linear or branched alkyl group having usually 6 or more, preferably 8 or more, and more preferably 12 or more carbon atoms.
- the alkyl group include hexyl group, octyl group, decyl group, lauryl group, octadecyl group, and behenyl group.
- the upper limit of the carbon number of the alkyl group is usually 30.
- Examples of the long-chain alkyl group-containing compound include polymer compounds having various long-chain alkyl groups in the side chain, long-chain alkyl group-containing amine compounds, long-chain alkyl group-containing ether compounds, and long-chain alkyl group-containing compounds.
- Class ammonium salt etc. are mentioned.
- a polymer compound is preferable.
- a polymer compound having a long-chain alkyl group in the side chain is more preferable from the viewpoint of obtaining releasability effectively.
- a polymer compound having a long-chain alkyl group in the side chain can be obtained by reacting a polymer compound having a reactive group with a compound having an alkyl group capable of reacting with the reactive group.
- the reactive group include a hydroxyl group, an amino group, a carboxyl group, and an acid anhydride.
- the polymer compound having these reactive groups include polyvinyl alcohol, polyethyleneimine, polyethyleneamine, reactive group-containing polyester resin, and reactive group-containing poly (meth) acrylic resin. Among these, polyvinyl alcohol is preferable in view of releasability and ease of handling.
- Examples of the compound having an alkyl group capable of reacting with the reactive group include, for example, long-chain alkyl group-containing isocyanates such as hexyl isocyanate, octyl isocyanate, decyl isocyanate, lauryl isocyanate, octadecyl isocyanate, and behenyl isocyanate, hexyl chloride, and octyl chloride.
- Long chain alkyl group-containing acid chlorides such as decyl chloride, lauryl chloride, octadecyl chloride, and behenyl chloride, long chain alkyl group-containing amines, and long chain alkyl group-containing alcohols.
- long chain alkyl group-containing isocyanates are preferable, and octadecyl isocyanate is particularly preferable in consideration of releasability and ease of handling.
- a polymer compound having a long-chain alkyl group in the side chain can also be obtained by copolymerization of a long-chain alkyl (meth) acrylate polymer or a long-chain alkyl (meth) acrylate and another vinyl group-containing monomer.
- the long-chain alkyl (meth) acrylate include hexyl (meth) acrylate, octyl (meth) acrylate, decyl (meth) acrylate, lauryl (meth) acrylate, octadecyl (meth) acrylate, and behenyl (meth) acrylate. It is done.
- a long-chain alkyl group-containing compound in order to improve the releasability of the film, but a plurality of conventionally known release agents may be used in combination.
- conventionally known release agents include waxes, fluorine compounds, and silicone compounds.
- antistatic agent used for forming the coating layer examples include ammonium group-containing compounds, polyether compounds, sulfonic acid compounds, betaine compounds and other ion conductive compounds, polyacetylene, polyphenylene, polyaniline, polypyrrole, polyisothianaphthene, ⁇ -electron conjugated polymer compounds such as polythiophene can be mentioned. These are used to impart antistatic properties to the film. Among these, an ion conductive compound is preferable, and an ammonium group-containing compound is particularly preferable.
- a coating layer formed from a coating liquid containing a ⁇ -conjugated conductive polymer such as polythiophene or polyaniline is generally strongly colored, it may not be suitable for optical applications requiring transparency.
- ⁇ -conjugated conductive polymer paints are generally more expensive than ion conductive paints, ion conductive antistatic agents are preferably used from the viewpoint of manufacturing cost.
- the ammonium group-containing compound refers to a compound having an ammonium group in the molecule, and is preferably a polymer compound having an ammonium group.
- a polymer containing a monomer having an ammonium group and an unsaturated double bond as components can be used.
- Such a polymer include a polymer having a constituent represented by the following formula (1) or the following formula (2) as a repeating unit. These homopolymers and copolymers, and other plural components may be copolymerized. From the viewpoint of improving the compatibility with other materials and the transparency of the resulting coating film, a polymer having a constituent represented by the following formula (1) as a repeating unit is preferred. Moreover, the polymer which has the structural element shown by following formula (2) as a repeating unit from the viewpoint of the high antistatic performance obtained and heat resistance is preferable.
- R 2 is —O— or —NH—
- R 3 is an alkylene group, or other structure capable of forming the structure of formula (1)
- R 1 , R 4 , R 5 , R 6 Are each a hydrogen atom, an alkyl group, a phenyl group or the like, and these alkyl group and phenyl group may be substituted with the following groups.
- Substitutable groups include, for example, hydroxy group, amide group, ester group, alkoxy group, phenoxy group, naphthoxy group, thioalkoxy group, thiophenoxy group, cycloalkyl group, trialkylammonium alkyl group, cyano group, halogen, etc. is there.
- R ⁇ 1 >, R ⁇ 2 > is respectively independently a hydrogen atom, an alkyl group, a phenyl group, etc.
- alkyl groups and a phenyl group may be substituted by the group shown below.
- Substitutable groups include, for example, hydroxyl group, amide group, ester group, alkoxy group, phenoxy group, naphthoxy group, thioalkoxy group, thiophenoxy group, cycloalkyl group, trialkylammonium alkyl group, cyano group, halogen, etc. is there.
- repeating units include, for example, alkyl acrylates such as methyl acrylate, ethyl acrylate, propyl acrylate, and butyl acrylate, and alkyl methacrylates such as methyl methacrylate, ethyl methacrylate, propyl methacrylate, and butyl methacrylate.
- alkyl acrylates such as methyl acrylate, ethyl acrylate, propyl acrylate, and butyl acrylate
- alkyl methacrylates such as methyl methacrylate, ethyl methacrylate, propyl methacrylate, and butyl methacrylate.
- repeating units include, for example, the above-mentioned alkyl acrylate, alkyl methacrylate, and acrylamide such as n-methylol acrylamide.
- a homopolymer having a repeating unit of the constituent represented by the above formula (2) is preferable.
- X ⁇ in the above formulas (1) and (2) can be appropriately selected within a range not impairing the gist of the present invention.
- examples include halogen ions, sulfonates, phosphates, nitrates, alkyl sulfonates, and carboxylates.
- a polymer having a component represented by the above formula (1) is preferable because of excellent transparency of the resulting coating layer.
- the coating stretching method may be inferior in heat resistance, and when used in the coating stretching method, X ⁇ is preferably not a halogen.
- the component represented by the above formula (2) and other compounds having an ammonium base in the polymer skeleton are excellent in heat resistance and are preferable.
- the polymer in which the constituents represented by the above formulas (1) to (2) and the polyethylene glycol-containing (meth) acrylate are copolymerized has a flexible structure, and is uniform during coating and stretching. It is preferable because an excellent coating layer can be obtained.
- a coating layer having excellent uniformity can be obtained by coating a polyethylene glycol-containing (meth) acrylate polymer in a coating solution.
- polyethylene glycol-containing (meth) acrylates include polyethylene glycol monoacrylate, polypropylene glycol monoacrylate, polyethylene glycol diacrylate (the polymerization degree of polyethylene glycol units is preferably in the range of 4 to 14), and polypropylene glycol diacrylate.
- polytetramethylene glycol diacrylate poly (ethylene glycol-tetramethylene glycol) diacrylate, poly (propylene glycol-tetramethylene glycol) diacrylate, polyethylene glycol-polypropylene glycol-polyethylene glycol diacrylate, polypropylene glycol-polybutylene glycol Monomethacrylate, methoxypolyethylene glycol Methacrylate, methoxypolyethyleneglycol monoacrylate, octoxypolyethyleneglycol-polypropyleneglycolmonomethacrylate, octoxypolyethyleneglycol-polypropyleneglycolmonoacrylate, lauroxypolyethyleneglycolmonomethacrylate, lauroxypolyethyleneglycolmonoacrylate, stearoxypolyethyleneglycolmonomethacrylate, Examples thereof include polymers starting from stearoxy polyethylene glycol monoacrylate, allyloxy polyethylene glycol monomethacrylate, allyloxy
- the number average molecular weight of the ammonium group-containing compound is usually 1,000 to 500,000, preferably 2,000 to 350,000, and more preferably 5,000 to 200,000.
- the molecular weight is less than 1000, the strength of the coating film may be weak or the heat resistance stability may be poor.
- the molecular weight exceeds 500,000, the viscosity of the coating solution increases, and the handleability and applicability may deteriorate.
- At least one of acrylic resin or polyvinyl alcohol is used, which is used to improve the transparency of the film.
- An acrylic resin is a polymer composed of a polymerizable monomer having a carbon-carbon double bond, as typified by acrylic and methacrylic monomers. These may be either a homopolymer or a copolymer. Moreover, the copolymer of these polymers and other polymers (for example, polyester, polyurethane, etc.) is also included. For example, a block copolymer or a graft copolymer. Alternatively, a polymer (possibly a mixture of polymers) obtained by polymerizing a polymerizable monomer having a carbon-carbon double bond in a polyester solution or a polyester dispersion is also included.
- a polymer (in some cases, a mixture of polymers) obtained by polymerizing a polymerizable monomer having a carbon-carbon double bond in a polyurethane solution or polyurethane dispersion is also included.
- a polymer (in some cases, a polymer mixture) obtained by polymerizing a polymerizable monomer having a carbon-carbon double bond in another polymer solution or dispersion is also included.
- the polymerizable monomer having a carbon-carbon double bond is not particularly limited, but particularly representative compounds include, for example, acrylic acid, methacrylic acid, crotonic acid, itaconic acid, fumaric acid, maleic acid, citracone Various carboxyl group-containing monomers such as acids, and salts thereof; 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, monobutyl hydroxyl fumarate, Various hydroxyl group-containing monomers such as monobutylhydroxy itaconate; various monomers such as methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, lauryl (meth) acrylate ( (Meth) acrylic acid esters Various nitrogen-containing compounds such as (meth) acrylamide, diacetone acrylamide, N-methylolacrylamide or
- the hydroxyl value of the acrylic resin is preferably 2 to 100 mgKOH / g, more preferably 5 to 50 mgKOH / g. When the hydroxyl value falls within the above range, the coating appearance and transparency are improved.
- Polyvinyl alcohol is a compound having a polyvinyl alcohol moiety.
- conventionally known polyvinyl alcohol can be used including modified compounds partially acetalized or butyralized with respect to polyvinyl alcohol.
- the degree of polymerization of polyvinyl alcohol is not particularly limited, but is usually 100 or more, preferably in the range of 300 to 40,000. When the degree of polymerization is less than 100, the water resistance of the coating layer may decrease.
- the degree of saponification of polyvinyl alcohol is not particularly limited, but is usually 70 mol% or more, preferably in the range of 70 to 99.9 mol%, more preferably 80 to 97 mol%, and particularly preferably 86 to 97 mol%. A saponified polyvinyl acetate of 95 mol% is practically used.
- various polymers other than acrylic resin and polyvinyl alcohol and a crosslinking agent can be used in combination.
- polymer examples include polyester resin, urethane resin, polyalkylene glycol, polyalkyleneimine, methylcellulose, hydroxycellulose, starches and the like.
- the polyester resin includes, for example, those composed of the following polyvalent carboxylic acid and polyvalent hydroxy compound as main constituent components. That is, as the polyvalent carboxylic acid, terephthalic acid, isophthalic acid, orthophthalic acid, phthalic acid, 4,4′-diphenyldicarboxylic acid, 2,5-naphthalenedicarboxylic acid, 1,5-naphthalenedicarboxylic acid, and 2,6 -Naphthalenedicarboxylic acid, 2,7-naphthalenedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, 2-potassium sulfoterephthalic acid, 5-sodium sulfoisophthalic acid, adipic acid, azelaic acid, sebacic acid, dodecanedicarboxylic acid, glutar Acid, succinic acid, trimellitic acid, trimesic acid, pyromellitic acid, trimellitic anhydride, phthalic anhydride,
- ethylene As the polyvalent hydroxy compound, ethylene Recall, 1,2-propylene glycol, 1,3-propylene glycol, 1,3-propanediol, 1,4-butanediol, 1,6-hexanediol, 2-methyl-1,5-pentanediol , Neopentyl glycol, 1,4-cyclohexanedimethanol, p-xylylene glycol, bisphenol A-ethylene glycol adduct, diethylene glycol, triethylene glycol, polyethylene glycol, polypropylene glycol Polytetramethylene glycol, polytetramethylene oxide glycol, dimethylolpropionic acid, glycerin, trimethylolpropane, sodium dimethylolethylsulfonate, potassium dimethylolpropionate, and the like can be used. One or more compounds may be appropriately selected from these compounds, and a polyester resin may be synthesized by a conventional polycondensation reaction.
- Urethane resin is a polymer compound having a urethane bond in the molecule.
- urethane resin is prepared by reaction of polyol and isocyanate.
- the polyol include polycarbonate polyols, polyester polyols, polyether polyols, polyolefin polyols, and acrylic polyols. These compounds may be used alone or in combination.
- Polycarbonate polyols are obtained from a polyhydric alcohol and a carbonate compound by a dealcoholization reaction.
- Polyhydric alcohols include ethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 1,5-pentane Diol, 1,6-hexanediol, 1,4-cyclohexanediol, 1,4-cyclohexanedimethanol, 1,7-heptanediol, 1,8-octanediol, 1,9-nonanediol, 1,10-decane Examples thereof include diol, neopentyl glycol, 3-methyl-1,5-pentanediol, and 3,3-dimethylol heptane.
- Examples of the carbonate compound include dimethyl carbonate, diethyl carbonate, diphenyl carbonate, and ethylene carbonate.
- Examples of the polycarbonate-based polyols obtained from these reactions include poly (1,6-hexylene) carbonate, poly (3- And methyl-1,5-pentylene) carbonate.
- Polyester polyols include polycarboxylic acids (malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, sebacic acid, fumaric acid, maleic acid, terephthalic acid, isophthalic acid, etc.) or their acid anhydrides.
- polycarboxylic acids malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, sebacic acid, fumaric acid, maleic acid, terephthalic acid, isophthalic acid, etc.
- polyhydric alcohol ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, butanediol, 1,3-butanediol, 1,4-butanediol, 2,3-butanediol, 2-methyl-1,3-propanediol, 1,5-pentanediol, neopentyl glycol, 1,6-hexanediol, 3-methyl-1,5-pentanediol, 2-methyl-2,4-pentanediol 2-methyl-2-propyl- , 3-propanediol, 1,8-octanediol, 2,2,4-trimethyl-1,3-pentanediol, 2-ethyl-1,3-hexanediol, 2,5-dimethyl-2,5-hexane Diol, 1,9-nonanediol
- polyether polyols examples include polyethylene glycol, polypropylene glycol, polyethylene propylene glycol, polytetramethylene ether glycol, polyhexamethylene ether glycol and the like.
- polyisocyanate compound used for obtaining the urethane resin examples include aromatic diisocyanates such as tolylene diisocyanate, xylylene diisocyanate, methylene diphenyl diisocyanate, phenylene diisocyanate, naphthalene diisocyanate, and tolidine diisocyanate, ⁇ , ⁇ , ⁇ ′, ⁇ ′.
- aromatic diisocyanates such as tolylene diisocyanate, xylylene diisocyanate, methylene diphenyl diisocyanate, phenylene diisocyanate, naphthalene diisocyanate, and tolidine diisocyanate, ⁇ , ⁇ , ⁇ ′, ⁇ ′.
- -Aliphatic diisocyanates having aromatic rings such as tetramethylxylylene diisocyanate, aliphatic diisocyanates such as methylene diisocyanate, propylene diisocyanate, trimethylhexamethylene diisocyanate, hexamethylene diisocyanate, cyclohexane diisocyanate, methylcyclohexane diisocyanate, isophorone diisocyanate, dicyclohexyl Methanzi Isocyanate, alicyclic diisocyanates such as isopropylidene dicyclohexyl diisocyanates. These may be used alone or in combination.
- a chain extender may be used when synthesizing the urethane resin, and the chain extender is not particularly limited as long as it has two or more active groups that react with an isocyanate group. Alternatively, a chain extender having two amino groups can be mainly used.
- chain extender having two hydroxyl groups examples include aliphatic glycols such as ethylene glycol, propylene glycol and butanediol, aromatic glycols such as xylylene glycol and bishydroxyethoxybenzene, and esters such as neopentyl glycol hydroxypivalate. And glycols such as glycols.
- chain extender having two amino groups examples include aromatic diamines such as tolylenediamine, xylylenediamine, diphenylmethanediamine, ethylenediamine, propylenediamine, hexanediamine, 2,2-dimethyl-1,3- Propanediamine, 2-methyl-1,5-pentanediamine, trimethylhexanediamine, 2-butyl-2-ethyl-1,5-pentanediamine, 1,8-octanediamine, 1,9-nonanediamine, 1,10- Aliphatic diamines such as decanediamine, 1-amino-3-aminomethyl-3,5,5-trimethylcyclohexane, dicyclohexylmethanediamine, isopropylidenecyclohexyl-4,4′-diamine, 1,4-diaminocyclohexane, 1, 3-Bisaminomethylcyclohexane Alicyclic diamines, and the like of.
- aromatic diamines
- Urethane resin may use a solvent as a medium, but preferably uses water as a medium.
- a forced emulsification type using an emulsifier there are a forced emulsification type using an emulsifier, a self-emulsification type in which a hydrophilic group is introduced into the urethane resin, and a water-soluble type.
- the self-emulsification type in which an ionic group is introduced into the structure of the urethane resin to form an ionomer is preferable because of excellent storage stability of the liquid and water resistance and transparency of the resulting coating layer.
- Examples of the ionic group to be introduced include various groups such as a carboxyl group, sulfonic acid, phosphoric acid, phosphonic acid, quaternary ammonium salt, and the like, and a carboxyl group is preferable.
- a method for introducing a carboxyl group into a urethane resin various methods can be taken in each stage of the polymerization reaction. For example, there are a method of using a carboxyl group-containing resin as a copolymer component during prepolymer synthesis, and a method of using a component having a carboxyl group as one component such as polyol, polyisocyanate, and chain extender.
- a method in which a desired amount of carboxyl groups is introduced using a carboxyl group-containing diol depending on the amount of this component charged is preferred.
- dimethylolpropionic acid, dimethylolbutanoic acid, bis- (2-hydroxyethyl) propionic acid, bis- (2-hydroxyethyl) butanoic acid, and the like are copolymerized with a diol used for polymerization of a urethane resin.
- the carboxyl group is preferably in the form of a salt neutralized with ammonia, amine, alkali metal, inorganic alkali or the like. Particularly preferred are ammonia, trimethylamine and triethylamine.
- a carboxyl group from which a neutralizing agent is removed in a drying step after coating can be used as a crosslinking reaction point by another crosslinking agent.
- another crosslinking agent it is possible to further improve the durability, solvent resistance, water resistance, blocking resistance, and the like of the obtained coating layer, as well as excellent stability in a liquid state before coating.
- crosslinking agent examples include melamine compounds, oxazoline compounds, epoxy compounds, isocyanate compounds, carbodiimide compounds, silane coupling compounds, and the like.
- crosslinking agents it is particularly preferable to use a melamine compound from the viewpoint of high crosslinking density.
- these crosslinking agents may use 2 or more types together.
- an alkylolated melamine derivative a compound obtained by reacting an alcohol with an alkylolated melamine derivative or partially etherified, or a mixture thereof can be used.
- alcohol used for etherification methyl alcohol, ethyl alcohol, isopropyl alcohol, n-butanol, isobutanol and the like are preferably used.
- a melamine compound either a monomer or a multimer more than a dimer may be sufficient, or a mixture thereof may be used.
- a product obtained by co-condensing urea or the like with a part of melamine can be used, and a catalyst can be used to increase the reactivity of the melamine compound.
- oxazoline compound a polymer containing an oxazoline group is particularly preferable, and it can be produced by polymerization with an addition polymerizable oxazoline group-containing monomer alone or with another monomer.
- Addition-polymerizable oxazoline group-containing monomers include 2-vinyl-2-oxazoline, 2-vinyl-4-methyl-2-oxazoline, 2-vinyl-5-methyl-2-oxazoline, 2-isopropenyl-2-oxazoline, Examples thereof include 2-isopropenyl-4-methyl-2-oxazoline, 2-isopropenyl-5-ethyl-2-oxazoline, and the like, and one or a mixture of two or more thereof can be used.
- 2-isopropenyl-2-oxazoline is preferred because it is easily available industrially.
- the other monomer is not particularly limited as long as it is a monomer copolymerizable with an addition polymerizable oxazoline group-containing monomer.
- alkyl (meth) acrylate (alkyl groups include methyl, ethyl, n-propyl, isopropyl, (Meth) acrylic acid esters such as n-butyl group, isobutyl group, t-butyl group, 2-ethylhexyl group, cyclohexyl group); acrylic acid, methacrylic acid, itaconic acid, maleic acid, fumaric acid, crotonic acid, styrene Unsaturated carboxylic acids such as sulfonic acid and its salts (sodium salt, potassium salt, ammonium salt, tertiary amine salt, etc.); Unsaturated nitriles such as acrylonitrile, methacrylonitrile; (meth) acrylamide, N-alkyl ( (Meth) acrylamide, N, N-dialkyl (meth) acrylamide, Examples of the alkyl group include unsaturated amides such as methyl,
- the epoxy compound is a compound having an epoxy group in the molecule, and examples thereof include condensates of epichlorohydrin with ethylene glycol, polyethylene glycol, glycerin, polyglycerin, bisphenol A and the like hydroxyl groups and amino groups, There are polyepoxy compounds, diepoxy compounds, monoepoxy compounds, glycidylamine compounds, and the like.
- polyepoxy compound examples include sorbitol polyglycidyl ether, polyglycerol polyglycidyl ether, pentaerythritol polyglycidyl ether, diglycerol polyglycidyl ether, triglycidyl tris (2-hydroxyethyl) isocyanate, glycerol polyglycidyl ether, trimethylolpropane.
- polyglycidyl ether and diepoxy compound examples include neopentyl glycol diglycidyl ether, 1,6-hexanediol diglycidyl ether, resorcin diglycidyl ether, ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, and propylene glycol diglycidyl ether.
- Polypropylene glycol diglycidyl ether polypropylene glycol diglycidyl ether, poly Examples of tetramethylene glycol diglycidyl ether and monoepoxy compounds include allyl glycidyl ether, 2-ethylhexyl glycidyl ether, phenyl glycidyl ether, and glycidyl amine compounds such as N, N, N ′, N′-tetraglycidyl-m-xylyl. Examples include range amine and 1,3-bis (N, N-diglycidylamino) cyclohexane.
- the cross-linking agent is used in a design that improves the performance of the coating layer by reacting in the drying process or the film forming process. In the obtained coating layer, it can be estimated that the unreacted product of these crosslinking agents, the compound after the reaction, or a mixture thereof is present.
- particles can be used in combination for the purpose of improving the blocking property and slipping property of the coating layer when forming the coating layer.
- an antifoaming agent when forming the coating layer, an antifoaming agent, a coating property improving agent, a thickener, an organic lubricant, an ultraviolet absorber, an antioxidant, a foaming agent, a dye, and a pigment. Etc. can be used in combination.
- the content of the release agent composed of the long-chain alkyl group-containing compound in the coating solution is usually in the range of 8 to 70% by weight, preferably in the range of 10 to 60% by weight, and more preferably 15% as a percentage of the total nonvolatile components. It is in the range of ⁇ 50% by weight. If the amount is less than 8% by weight, sufficient release performance may not be obtained. If the amount is more than 70% by weight, other components may be small, so that antistatic properties and transparency may not be obtained.
- the content of the antistatic agent in the coating solution is usually in the range of 10 to 70% by weight, preferably in the range of 15 to 60% by weight, and more preferably in the range of 20 to 50% by weight as a ratio to the total nonvolatile components. .
- the amount is less than 10% by weight, sufficient antistatic performance may not be obtained.
- the amount is more than 70% by weight, other components may be small, and thus releasability and transparency may not be obtained.
- the content of the acrylic resin or polyvinyl alcohol in the coating solution is usually in the range of 3 to 70% by weight, preferably in the range of 5 to 60% by weight, and more preferably in the range of 10 to 50% by weight, as a ratio to the total nonvolatile components. It is. When it is out of the above range, there is a possibility that sufficient transparency cannot be obtained, or that antistatic property and releasability cannot be obtained.
- the analysis of the components in the coating layer can be performed, for example, by analysis of TOF-SIMS, ESCA, fluorescent X-rays and the like.
- a coating layer When providing a coating layer by in-line coating, apply the above-mentioned series of compounds as an aqueous solution or water dispersion on a polyester film with a coating solution adjusted to a solid content concentration of about 0.1 to 50% by weight. It is preferable to produce a coated film at. Moreover, in the range which does not impair the main point of this invention, a small amount of organic solvents may be contained in the coating liquid for the purpose of improving dispersibility in water, improving film-forming properties, and the like. Only one type of organic solvent may be used, or two or more types may be used as appropriate.
- the film thickness of the coating layer is usually 0.005 to 1 ⁇ m, preferably 0.01 to 0.2 ⁇ m, more preferably 0.02 to 0.1 ⁇ m, and particularly preferably 0.02 to 0.04 ⁇ m.
- the film thickness exceeds 1 ⁇ m, the appearance and transparency may be deteriorated, and when the film thickness is less than 0.005 ⁇ m, sufficient releasability and antistatic properties may not be obtained.
- Examples of the method for forming the coating layer include gravure coating, reverse roll coating, die coating, air doctor coating, blade coating, rod coating, bar coating, curtain coating, knife coating, transfer roll coating, squeeze coating, impregnation coating, and kiss coating.
- Conventionally known coating methods such as spray coating, calendar coating, and extrusion coating can be used.
- the drying and curing conditions for forming the coating layer are not particularly limited.
- the coating layer is usually 80 to 200 ° C. for 3 to 40 seconds, preferably 100 to 180 ° C. Therefore, heat treatment should be performed for 3 to 40 seconds as a guide.
- the coating layer is provided by in-line coating, it is usually preferable to perform heat treatment at 70 to 270 ° C. for 3 to 200 seconds as a guide.
- polyester film constituting the coating film may be subjected to surface treatment such as corona treatment or plasma treatment in advance.
- the peel strength of the polyester film to the adhesive tape is usually 2000 mN / cm or less, preferably 1700 mN / cm or less, and more preferably 1200 mN / cm or less.
- the peeling force is higher than 2000 mN / cm, the material on the release layer may not be peeled well.
- the surface resistance value of the polyester film is usually 5 ⁇ 10 12 ⁇ or less, preferably 5 ⁇ 10 11 ⁇ or less, more preferably 1 ⁇ 10 11 ⁇ or less, and particularly preferably 1 ⁇ 10 10 ⁇ .
- the film haze of the polyester film is usually 2.5% or less, preferably 2.0% or less, more preferably 1.5% or less, and particularly preferably 1.3% or less.
- Coating layer thickness measurement method The surface of the coating layer was dyed with RuO 4 and embedded in an epoxy resin. Thereafter, the section prepared by the ultrathin section method was stained with RuO 4 , and the cross section of the coating layer was measured using TEM (H-7650 manufactured by Hitachi High-Technologies Corporation, acceleration voltage 100 V).
- the polyester used in the examples and comparative examples was prepared as follows. ⁇ Method for producing polyester (A)> Using 100 parts by weight of dimethyl terephthalate and 60 parts by weight of ethylene glycol as starting materials, 0.09 parts by weight of magnesium acetate tetrahydrate as a catalyst is placed in the reactor, the reaction start temperature is set to 150 ° C., and the methanol is distilled off gradually. The reaction temperature was raised to 230 ° C. after 3 hours. After 4 hours, the transesterification reaction was substantially terminated. After adding 0.04 part by weight of ethyl acid phosphate to this reaction mixture, 0.04 part by weight of antimony trioxide was added, and a polycondensation reaction was carried out for 4 hours.
- the temperature was gradually raised from 230 ° C. to 280 ° C.
- the pressure was gradually reduced from normal pressure, and finally 0.3 mmHg.
- the reaction was stopped at a time corresponding to an intrinsic viscosity of 0.63 due to a change in stirring power of the reaction tank, and the polymer was discharged under nitrogen pressure.
- the intrinsic viscosity of the obtained polyester (A) was 0.63.
- polyester (B) ⁇ Method for producing polyester (B)>
- the polyester (A) production method after adding 0.04 part by weight of ethyl acid phosphate, 0.2 part by weight of silica particles having an average particle diameter of 2 ⁇ m and 0.04 part by weight of antimony trioxide are added to obtain the intrinsic viscosity.
- a polyester (B) was obtained using the same method as the production method of the polyester (A) except that the polycondensation reaction was stopped at a time corresponding to 0.65.
- the obtained polyester (B) had an intrinsic viscosity of 0.65.
- Examples of compounds constituting the coating layer are as follows. (Example compounds) ⁇ Releasing agent (long chain alkyl group-containing compound): (IA) To a four-necked flask, 200 parts of xylene and 600 parts of octadecyl isocyanate were added and heated with stirring. From the time when xylene began to reflux, 100 parts of polyvinyl alcohol having an average degree of polymerization of 500 and a degree of saponification of 88 mol% was added in small portions over a period of about 2 hours. After the addition of polyvinyl alcohol, the reaction was completed by further refluxing for 2 hours. When the reaction mixture was cooled to about 80 ° C.
- reaction product was precipitated as a white precipitate.
- This precipitate was filtered off, added with 140 parts of xylene, and heated to dissolve completely. After repeating the operation of adding methanol again to precipitate several times, the precipitate was washed with methanol and dried and ground.
- Antistatic agent IIA A polymer compound having a number average molecular weight of 30000, obtained by copolymerizing a structural unit of the following formula 3-1 and a structural unit of the following formula 3-2 in a weight ratio of 95/5
- Antistatic agent IIB A high molecular compound having a number average molecular weight of 30,000, copolymerized with the structural unit of Formula 3-1.
- Antistatic agent IIC A copolymer having a weight ratio of 75/12/15/30 of 2- (trimethylamino) ethyl methacrylate / ethyl methacrylate / butyl methacrylate / polyethylene glycol-containing monoacrylate whose counter ion is methyl sulfonate. Number average molecular weight is 40,000.
- Antistatic agent IID Antistatic agent having a number average molecular weight of 50,000, comprising a structural unit of the following formula 4.
- Example 1 In Example 1, it manufactured similarly to Example 1 except having changed the coating agent composition into the coating agent composition shown in Table 1, and obtained the polyester film.
- the obtained polyester film was as shown in Table 2 and had good release properties, antistatic properties and transparency.
- Comparative Example 1 In Example 1, it manufactured like Example 1 except not providing an application layer, and obtained the polyester film. When the obtained coated film was evaluated, it was as shown in Table 2 and was inferior in releasability and antistatic properties.
- Example 1 In Example 1, it manufactured similarly to Example 1 except having changed the coating agent composition into the coating agent composition shown in Table 1, and obtained the polyester film. When the obtained coated film was evaluated, it was as shown in Table 2. In some cases, the release property, antistatic property and transparency were inferior.
- the coated film of the present invention is, for example, a process film used in various processes such as transfer for molding simultaneous transfer, manufacturing of flexible printed wiring boards, process paper for manufacturing plastic sheets, and carrier tape cover tape. In particular, it can be suitably used in applications requiring peelability, antistatic properties, and transparency.
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Abstract
Description
ポリエステルに非相溶な他のポリマー成分および顔料を除去したポリエステル1gを精秤し、フェノール/テトラクロロエタン=50/50(重量比)の混合溶媒100mlを加えて溶解させ、30℃で測定した。
TEM(株式会社日立ハイテクノロジーズ製 H-7650、加速電圧100V)を使用して塗布層を観察し、粒子10個の粒径の平均値を平均粒径とした。
塗布層の表面をRuO4で染色し、エポキシ樹脂中に包埋した。その後、超薄切片法により作成した切片をRuO4で染色し、塗布層断面をTEM(株式会社日立ハイテクノロジーズ製 H-7650、加速電圧100V)を用いて測定した。
試料フィルムの離型層表面に粘着テープ(日東電工株式会社製「No.31B」)を2kgゴムローラーにて1往復圧着し、室温にて1時間放置後の剥離力を測定した。剥離力は、株式会社島津製作所製「Ezgraph」を使用し、引張速度300mm/分の条件下、180°剥離を行った。
試料フィルムをJIS-K-7136に準じ、株式会社村上色彩技術研究所製ヘーズメーター「HM-150」により、フィルムヘーズを測定した。
日本ヒューレット・パッカード株式会社製高抵抗測定器:HP4339Bおよび測定電極:HP16008Bを使用し、23℃,50%RHの測定雰囲気でサンプルを30分間調湿後、表面抵抗値を測定した。
<ポリエステル(A)の製造方法>
テレフタル酸ジメチル100重量部とエチレングリコール60重量部とを出発原料とし、触媒として酢酸マグネシウム・四水塩0.09重量部を反応器にとり、反応開始温度を150℃とし、メタノールの留去とともに徐々に反応温度を上昇させ、3時間後に230℃とした。4時間後、実質的にエステル交換反応を終了させた。この反応混合物にエチルアシッドフォスフェート0.04重量部を添加した後、三酸化アンチモン0.04重量部を加えて、4時間重縮合反応を行った。すなわち、温度を230℃から徐々に昇温し280℃とした。一方、圧力は常圧より徐々に減じ、最終的には0.3mmHgとした。反応開始後、反応槽の攪拌動力の変化により、極限粘度0.63に相当する時点で反応を停止し、窒素加圧下ポリマーを吐出させた。得られたポリエステル(A)の極限粘度は0.63であった。
ポリエステル(A)の製造方法において、エチルアシッドフォスフェート0.04重量部を添加後、平均粒子径2μmのシリカ粒子を0.2重量部、三酸化アンチモン0.04重量部を加えて、極限粘度0.65に相当する時点で重縮合反応を停止した以外は、ポリエステル(A)の製造方法と同様の方法を用いてポリエステル(B)を得た。得られたポリエステル(B)は、極限粘度0.65であった。
(化合物例)
・離型剤(長鎖アルキル基含有化合物):(IA)
4つ口フラスコにキシレン200部、オクタデシルイソシアネート600部を加え、攪拌下に加熱した。キシレンが還流し始めた時点から、平均重合度500、ケン化度88モル%のポリビニルアルコール100部を少量ずつ10分間隔で約2時間にわたって加えた。ポリビニルアルコールを加え終わってから、さらに2時間還流を行い、反応を終了した。反応混合物を約80℃まで冷却してから、メタノール中に加えたところ、反応生成物が白色沈殿として析出したので、この沈殿を濾別し、キシレン140部を加え、加熱して完全に溶解させた後、再びメタノールを加えて沈殿させるという操作を数回繰り返した後、沈殿をメタノールで洗浄し、乾燥粉砕して得た。
下記式3-1の構成単位と、下記式3-2の構成単位とを重量比率で95/5の重量比率で共重合した、数平均分子量30000の高分子化合物
式3-1の構成単位を共重合した、数平均分子量30000の高分子化合物
対イオンがメチルスルホネートである、2-(トリメチルアミノ)エチルメタクリレート/エチルメタクリレート/ブチルメタクリレート/ポリエチレングリコール含有モノアクリレートが、重量比で75/12/15/30である共重合ポリマー。数平均分子量が40000。
・帯電防止剤:IID
下記式4の構成単位からなる、数平均分子量50000の帯電防止剤
エチルアクリレート/n-ブチルアクリレート/メチルメタクリレート/N-メチロールアクリルアミド/アクリル酸=65/21/10/2/2(重量%)の乳化重合体(乳化剤:アニオン系界面活性剤)。水酸基価11mgKOH/g。
エチルアクリレート/メチルアクリレート/2-ヒドロキシエチルメタクリレート/N-メチロールアクリルアミド/アクリル酸=65/28/3/2/2(重量%)の乳化重合体(乳化剤:アニオン系界面活性剤)。水酸基価24mgKOH/g。
ケン化度88モル%、重合度500のポリビニルアルコール
・ヘキサメトキシメチロールメラミン:(IV)
ポリエステル(A)、(B)をそれぞれ90%、10%の割合で混合した混合原料を最外層(表層)の原料とし、ポリエステル(A)のみを中間層の原料として、2台の押出機に各々を供給し、各々285℃で溶融した後、40℃に設定した冷却ロール上に、2種3層(表層/中間層/表層=1:8:1の吐出量)の層構成で共押出し冷却固化させて未延伸シートを得た。次いで、ロール周速差を利用してフィルム温度85℃で縦方向に3.4倍延伸した後、この縦延伸フィルムの片面に、下記表1に示す塗布液1を塗布し、テンターに導き、横方向に110℃で4.3倍延伸し、235℃で熱処理を行った後、横方向に2%弛緩し、膜厚(乾燥後)が0.03μmの離型層を有する厚さ50μmのポリエステルフィルムを得た。
実施例1において、塗布剤組成を表1に示す塗布剤組成に変更する以外は実施例1と同様にして製造し、ポリエステルフィルムを得た。得られたポリエステルフィルムは表2に示すとおりであり、離型性、帯電防止性、透明性が良好であった。
実施例1において、塗布層を設けないこと以外は実施例1と同様にして製造し、ポリエステルフィルムを得た。得られた塗布フィルムを評価したところ、表2に示すとおりであり、離型性や帯電防止性が劣るものであった。
実施例1において、塗布剤組成を表1に示す塗布剤組成に変更する以外は実施例1と同様にして製造し、ポリエステルフィルムを得た。得られた塗布フィルムを評価したところ、表2に示すとおりであり、離型性や帯電防止性、透明性が劣る場合が見られた。
Claims (8)
- ポリエステルフィルムの少なくとも片面に、長鎖アルキル基含有化合物から成る離型剤および帯電防止剤と、アクリル樹脂またはポリビニルアルコールとを含有する塗布液から形成された塗布層を有することを特徴とする塗布フィルム。
- 長鎖アルキル基の炭素数が6~30である請求項1に記載の塗布フィルム。
- 長鎖アルキル基含有化合物が長鎖アルキル基を側鎖に持つ高分子化合物である請求項1又は2に記載の塗布フィルム。
- 長鎖アルキル基を側鎖に持つ高分子化合物が長鎖アルキル基含有イソシアネートとポリビニルアルコールとの反応生成物である請求項3に記載の塗布フィルム。
- 帯電防止剤がイオン導電性の化合物である請求項1~4の何れかに記載の塗布フィルム。
- イオン導電性の化合物がアンモニウム基含有化合物である請求項5に記載の塗布フィルム。
- アクリル樹脂が水酸基価2~100mgKOH/gの水酸基含有アクリル樹脂である請求項1~6の何れかに記載の塗布フィルム。
- 塗布液中の全不揮発成分に対する割合として、長鎖アルキル基含有化合物から成る離型剤の含有量が8~70重量%、帯電防止剤の含有量が10~70重量%、アクリル樹脂またはポリビニルアルコールの含有量が3~70重量%の範囲である請求項1~7の何れかに記載の塗布フィルム。
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JP2017149849A (ja) * | 2016-02-25 | 2017-08-31 | 三菱ケミカル株式会社 | 積層フィルム |
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US11766853B2 (en) * | 2017-03-02 | 2023-09-26 | Mitsubishi Chemical Corporation | White laminated film and recording material |
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EP2982509B1 (en) * | 2013-04-06 | 2018-03-28 | Mitsubishi Chemical Corporation | Applied film |
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WO2017141507A1 (ja) * | 2016-02-18 | 2017-08-24 | 竹本油脂株式会社 | 熱可塑性高分子フィルムコーティング用組成物、該組成物の水性液、該水性液の製造方法、熱可塑性高分子フィルム及び熱可塑性高分子フィルムの製造方法 |
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EP3029092A4 (en) | 2017-03-08 |
KR20160046851A (ko) | 2016-04-29 |
EP3029092A1 (en) | 2016-06-08 |
CN105658709A (zh) | 2016-06-08 |
US20160222178A1 (en) | 2016-08-04 |
JP2015139925A (ja) | 2015-08-03 |
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