WO2005116120A1 - 積層ポリエステルフィルムおよびその製造法 - Google Patents
積層ポリエステルフィルムおよびその製造法 Download PDFInfo
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- WO2005116120A1 WO2005116120A1 PCT/JP2005/010006 JP2005010006W WO2005116120A1 WO 2005116120 A1 WO2005116120 A1 WO 2005116120A1 JP 2005010006 W JP2005010006 W JP 2005010006W WO 2005116120 A1 WO2005116120 A1 WO 2005116120A1
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- polyester film
- film
- inorganic
- coating
- coating layer
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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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- 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
- C08J7/046—Forming abrasion-resistant coatings; Forming surface-hardening coatings
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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
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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
- C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
- C08J7/0423—Coating with two or more layers, where at least one layer of a composition contains a polymer binder with at least one layer of inorganic material and at least one layer of a composition containing a polymer binder
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/16—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer
- C09J2301/162—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer the carrier being a laminate constituted by plastic layers only
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2433/00—Presence of (meth)acrylic polymer
- C09J2433/003—Presence of (meth)acrylic polymer in the primer coating
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2467/00—Presence of polyester
- C09J2467/003—Presence of polyester in the primer coating
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester in the substrate
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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
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
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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
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T428/254—Polymeric or resinous material
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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
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T428/259—Silicic material
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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
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31786—Of polyester [e.g., alkyd, etc.]
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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
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31786—Of polyester [e.g., alkyd, etc.]
- Y10T428/31797—Next to addition polymer from unsaturated monomers
-
- 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
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31855—Of addition polymer from unsaturated monomers
- Y10T428/31935—Ester, halide or nitrile of addition polymer
Definitions
- the present invention relates to a laminated polyester film and a method for producing the same. More specifically, the present invention relates to a laminated polyester film having a coating film formed on at least one surface of a polyester film.
- Polyester films especially biaxially stretched films of polyethylene terephthalate and polyethylene naphthalate, have excellent mechanical properties, heat resistance, and chemical resistance, so magnetic tapes, ferromagnetic thin film tapes, photographic films, and packaging It is widely used as a material for films for electronic parts, films for electronic components, electrical insulating films, films for laminating metal plates, films to be attached to the surface of glass displays, etc., and films for protecting various members.
- polyester films have been widely used in various optical films in particular, and are used as base films for liquid crystal display devices such as prism lens sheets, sunset panels, backlights, antireflection film base films, and plasma display devices. It is used for applications such as electromagnetic wave shielding films, base films for organic EL displays, and explosion-proof base films for displays.
- the base film used for such an optical film is required to have excellent transparency. In addition, excellent easy adhesion to the prism lens layer, hard coat, adhesive, antireflection treatment, and spatter layer is required.
- fine particles can be added to the easy-adhesion layer to improve the lubricity and scratch resistance, but the haze of the easy-adhesion layer is increased and the transparency may be reduced. Furthermore, if the base film is highly transparent, even a slight change in the coating thickness of the easy-adhesion layer may result in coating defects, resulting in poor appearance. It has been proposed to use fine particles having a particle size of more than 20 O nm in order to improve scratch resistance and lubricity (Japanese Patent Application Laid-Open Nos. 2001-9666 and 2000). 0—2 293 95). However, with these techniques, there is a problem that the fine particles are missing or the film is inferior in scratch resistance, so that the film is damaged by contact with a hard material such as a metal roll.
- the biaxially oriented polyester film generally has poor adhesion to other materials, such as a prism lens layer or a hard coat mainly composed of an acrylic resin, so that a polyester resin polyacrylic resin is formed on the surface of the polyester film.
- a polyester resin polyacrylic resin is formed on the surface of the polyester film.
- an easily adhesive layer such as a urethane resin (see Japanese Patent Application Laid-Open Nos. Hei 10-11092 and 2000-246-855). ). If an easy-adhesive layer made of these resins is formed, the adhesive strength may be insufficient.
- a CRT film has good adhesion to the hard coat layer but adheres to the opposite adhesive layer. Is insufficient and versatility is poor. Disclosure of the invention
- An object of the present invention is to solve the problems of the prior art, to have excellent transparency, lubricity and especially scratch resistance, and to have excellent adhesion to layers used in various optical applications and to have few coating defects. It is to provide a laminated polyester film.
- Another object of the present invention is to provide an industrially advantageous production method for producing the laminated polyester film of the present invention.
- the coating layer contains a polymer binder and inorganic-organic composite particles having an average particle diameter of 200 to 2,000 nm. Consisting of a composition,
- An aqueous coating solution containing a polymer binder and inorganic-organic composite particles having an average particle diameter of 200 to 2,000 nm is applied to at least one surface of the polyester film before the crystal orientation is completed, and then, Forming a coating layer on at least one side of the stretched polyester film stretched in at least one direction and thermally fixed;
- the laminated polyester film of the present invention is suitably used as an optical adhesive film.
- the polyester constituting the laminated polyester film of the present invention is a linear saturated polyester synthesized from an aromatic dibasic acid or an ester-forming derivative thereof and a diol or an ester-forming derivative thereof.
- Specific examples of such polyesters include polyethylene terephthalate, polyethylene isophthalate, polybutylene terephthalate, poly (1,4-cyclohexylene dimethylene terephthalate), and polyethylene 1,2,6-naphthalate. Can be mentioned.
- polyethylene terephthalate or polyethylene 1,6-naphthalate is preferably used because of its good balance of mechanical properties and optical properties.
- the polyester may be a copolymer composed of repeating units of the above polyesters.
- the polyester may be, for example, 80% by mole or more and another type of resin, for example, 20%. % Or less.
- Such a polyester may contain a colorant, an antistatic agent, an antioxidant, an organic lubricant, and a catalyst. It is preferable not to contain filler in view of transparency.
- the polyester film is, for example, melt-extruded from the above polyester into a film, cooled and solidified by a casting drum to form an unstretched film, and the unstretched film is stretched in the longitudinal direction at Tg to (Tg + 60) ° C. Stretch 1 or more times so that the total magnification is 3 to 6 times, and if necessary, increase the magnification to 3 to 5 times in the width direction at Tg to (Tg + 60) ° C. It is stretched, and if necessary, heat-treated at 180 to 230 ° C for 1 to 60 seconds, preferably 0 to 20% in the width direction at a temperature lower by 10 to 20 ° C than the heat treatment temperature. By performing the re-heat treatment while shrinking, it can be obtained.
- the glass transition temperature is abbreviated as Tg.
- the thickness of the polyester film is from 25 to 300 im to obtain the necessary strength when used as a support for liquid crystal, hard coat, sunset panel, anti-glare treatment, electromagnetic wave shielding film for PDP, organic EL, etc. Is preferable, and particularly preferably 50 to 250 m.
- the laminated polyester film of the present invention has a coating layer on at least one side of the polyester film.
- This coating layer is composed of a coating composition containing a polymer binder and inorganic-organic composite particles having an average particle diameter of 200 to 2,000 nm.
- polymer binder examples include polyester resins, acrylic resins, urethane resins, and blends of these resins.
- polyester resin a polyester obtained from the following polybasic acid component and dial component can be used.
- the polyvalent base component include terephthalic acid, isofluoric acid, phthalic acid, phthalic anhydride, 2,6-naphthalenedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, adipic acid, sebacic acid , Trimellitic acid, pyromellitic acid, dimer acid and 5-sodium sulfoisofuroic acid.
- a polyester resin two or more dicarboxylic acid components It is preferable to use the copolymerized polyester used.
- the polyester resin contains a slight amount of, for example, 1 to 5 mol% of an unsaturated polybasic acid component such as maleic acid or itaconic acid or a hydroxycarboxylic acid component such as p-hydroxybenzoic acid with respect to the total dicarboxylic acid component. May be included.
- diol component examples include ethylene glycol, 1,4-butanediol, diethylene glycol, dipropylene glycol, 1,6-hexanediol, 1,4-cyclohexanedimethanol, xylene glycol, dimethylolpropane, and the like. And poly (ethylene oxide) dalicol and poly (tetramethylene oxide) glycol.
- acrylic monomers constituting the acrylic resin include acrylic monomers as exemplified below.
- the acrylic monomers include alkyl acrylate, alkyl methacrylate (alkyl groups include methyl, ethyl, n-propyl, isopropyl, n-butyl, isopropyl, t-butyl, 2-butyl).
- Hydroxy-containing monomers such as 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl methacrylate; glycidyl acrylate Epoxy group-containing monomers such as glycidyl methacrylate, aryl glycidyl ether, etc .; acrylic acid, methacrylic acid, itaconic acid, maleic acid, fumaric acid, crotonic acid, styrenesulfonic acid and salts thereof (sodium salt, potassium salt) Salt, ammonium salt, tertiary Monomers containing a carboxy group or a salt thereof; acrylamide, methacrylamide, N-alkylacrylamide, N-alkylmethacrylamide, N, N-dialkylacrylamide, N, N-dialkylmethacrylate (alkyl group) Methyl, ethyl, n-propyl, isopropyl, n-
- the above monomers can be used alone or in combination of two or more.
- an acrylic resin having an oxazoline group and a polyalkylene oxide chain can be preferably used.
- acryl resin examples include an acrylic resin comprising a monomer having an oxazoline group as shown below and a monomer having a polyalkylene oxide chain.
- Examples of the monomer having an oxazoline group include 2-vinyl-21-year-old oxazoline, 2-vinyl-4-methyl-2-oxazoline, 2-vinyl-5-methyl-2-oxazoline, 2-isopropenyl-2-oxazoline, —Isopropenyl-4-methyl-2-oxazoline and 2-isopropenyl-5-methyl-12-oxazoline.
- 2-isopropenyl-12-oxazoline is preferred because it is industrially available.
- an acrylic resin having an oxazoline group the cohesive strength of the coating layer is improved, and the adhesion with the hard coat / adhesive layer and the like is further strengthened. Further, scratch resistance to a metal roll in a film forming process or a hard coat processing process can be imparted.
- Examples of the monomer having a polyalkylene oxide chain include those obtained by adding a polyalkylene oxide to an ester portion of acrylic acid or methacrylic acid. You can.
- Examples of the polyalkylene oxide chain include polymethylene oxide, polyethylene oxide, polypropylene oxide, and polybutylene oxide.
- the number of repeating units in the polyalkylene oxide chain is preferably from 3 to 100.
- the compatibility between the polyester resin and the acryl resin is poor, and the transparency of the coating layer is poor. If it exceeds 100, the wet heat resistance of the coating layer is reduced, and the humidity is high. At high temperatures, the adhesion to hard coat and the like deteriorates, which is not preferable.
- the urethane resin is composed of a polyol, a polyisocyanate, a chain extender, a crosslinking agent, and the like.
- the polyol include polyoxyethylene glycol, polyoxypropylene glycol, polyethers such as polyoxytetramethylene glycol, polyethylene adenylate having hydroxyl groups at both ends, polyethylene monobutylene dipate, and polyolefin.
- polyesters having hydroxyl groups at both ends polyesters having hydroxyl groups at both ends, acrylic polyols, castor oil and the like, which are produced by a dehydration reaction of a glycol and a dicarboxylic acid such as prolactone.
- polyisocyanates examples include tolylene diisocyanate, phenylene diisocyanate, 4,4'-diphenylmethane diisocyanate, hexamethylene diisocyanate, xylylene diisocyanate.
- examples include isocyanate, 4,4′-dicyclohexylmethane diisocyanate, and isophorone diisocyanate.
- chain extenders or cross-linking agents examples include ethylene glycol, propylene glycol, diethylene glycol, trimethylolpropane, hydrazine, ethylenediamine, diethylenetriamine, triethylenetetramine, 4,4'-diaminodiphenyl ⁇ / methane, 4,4 '-Diaminodicyclohexylmethane, water and the like.
- a mixture of a polyester resin and an acryl resin is preferable from the viewpoint of imparting good adhesiveness, and a mixture of a polyester resin and an acrylic resin having an oxazoline group and a polyalkylene oxide chain is particularly preferable.
- the polymer binder is preferably soluble or dispersible in water, but a water-soluble binder containing some organic solvent can also be preferably used.
- the glass transition point of the polyester resin as the polymer binder is preferably from 40 to 100 ° C, more preferably from 60 to 80 ° C. Within this range, excellent adhesiveness and excellent scratch resistance can be obtained. On the other hand, if the glass transition temperature is less than 40 ° C, blocking occurs between the films, and if the glass transition temperature exceeds 100 ° C, the coating becomes hard and brittle, resulting in poor scratch resistance. It is not preferable because the film forming property is deteriorated and the appearance of the coating is deteriorated.
- the content of the polyester resin constituting the polymer binder in the coating layer in the coating layer is preferably 5 to 95% by weight, more preferably 50 to 90% by weight.
- the content of the acrylic resin having an oxazoline group and a polyalkylene oxide chain constituting the polymer binder of the coating layer in the coating layer is preferably 5 to 95% by weight, and more preferably 5 to 90% by weight. % By weight, particularly preferably from 10 to 50% by weight.
- the polyester resin exceeds 95% by weight or the acryloyl resin having an oxazoline group and a polyalkylene oxide chain is less than 5% by weight, the cohesive strength of the coating layer is reduced and the hard coat is adhered to the adhesive. This is not preferred because the properties may be insufficient. If the amount of the polyester resin is less than 5% by weight or the amount of the acryl resin exceeds 95% by weight, the adhesion to the polyester film is reduced, and the adhesion to the hard coat or the adhesive may be insufficient.
- the inorganic-organic composite particles are particles of a composite of an inorganic substance and an organic substance.
- inorganic substances include silicon oxide, calcium carbonate, magnesium carbonate, calcium oxide, zinc oxide, magnesium oxide, sodium silicate, aluminum oxide, iron oxide, iron oxide, zirconium oxide, barium sulfate, and titanium oxide.
- Tin oxide, antimony trioxide, carbon black, and molybdenum disulfide can be used. Of these, gay oxide is particularly preferred.
- a polymer is preferable in terms of exhibiting a coating film fixing force, and a molecular weight, a shape, and a group
- any polymer can be used.
- acrylic resin, polyester resin, urethane resin, silicone resin, fluororesin, benzoguanamine resin, phenol resin, and nylon resin can be used. Of these, acrylic resins are particularly preferred.
- the organic-inorganic composite particles fine particles containing a silicon element are preferable because very good adhesion strength / scratch resistance can be obtained.
- the fine particles preferably contain 10 to 40% by weight of a silicon element in the fine particles. If the content of the silicon element in the fine particles is less than 10% by weight, it is difficult to obtain good scratch resistance, and if it exceeds 40% by weight, it is difficult to obtain a good fixing force, which is not preferable.
- the organic-inorganic composite particles are formed, for example, by coating an organic resin on the surface of fine particles made of inorganic material, coating an inorganic material on the surface of fine particles made of organic material, or by mixing an inorganic material and an organic material.
- Mixing refers to a state in which an organic substance and an inorganic substance are mixed at the molecular level, a state in which an organic substance has entered into inorganic particles having a pore structure, a state in which inorganic fine particles have entered into an entangled structure of an organic substance, or an organic substance.
- Fine particles comprising a mixture of water and an inorganic material may be coated with an organic or inorganic material.
- Specific organic / inorganic composite particles are particularly preferably silicon oxide / acrylic resin composites and silicon oxide / silicone resin composites.
- the shape of the organic-inorganic composite particles may be any particle shape such as a sphere, a needle, a plate, a scale, and a broken frame, and is not particularly limited, but a sphere or a shape close to a sphere is preferable.
- the inorganic substance and the organic substance may be physically and chemically fixed.
- the term "physically fixed” refers to, for example, a state in which a polymer forms a crosslinked structure in inorganic particles having a pore structure, and an inorganic substance and an organic substance are fixed.
- Chemical fixation means that organic and inorganic substances are fixed by chemical bonding. In particular, chemically fixed particles are preferred in terms of strength.
- the average particle diameter of the inorganic-organic composite particles is from 200 to 2,000 nm, preferably Is from 300 to L; 500 nm. If the average particle size is smaller than 200 nm, the film may be easily damaged, for example, a metal roller having a high rotational torque may have insufficient scratch resistance, and the film surface may be damaged. If the average particle size is more than 2,000 nm, the haze on the film surface becomes high, and the optical characteristics deteriorate.
- the particles of the coating composition are composite particles of an inorganic substance and an organic substance, the cohesive force between the coating layer and the particles is increased, and the particles are prevented from dropping. That is, in the present invention, even when fine particles having an average particle diameter much larger than the thickness of the coating layer are contained in the coating layer, the fine particles do not drop. For example, even when fine particles having an average particle diameter of more than 200 nm and a coating layer having a thickness of 0.05 are used, the fine particles are not lost. On the other hand, if fine particles consisting only of an inorganic material are used as the fine particles, a film having good scratch resistance can be obtained because of the high hardness of the fine particles, but the compatibility with the polymer binder is not good.
- fine particles are likely to be missing.
- the compatibility with the polymer binder is good and the binder and the fine particles have a high cohesive force, so that the fine particles are unlikely to be lost, but the hardness of the fine particles is low and sufficient scratch resistance is obtained. May not be available.
- the content of the inorganic-organic composite particles in the coating composition is preferably in the range of 0.01 to 5 parts by weight per 100 parts by weight of the coating composition of the coating layer. If it is less than 0.01 part by weight, sufficient lubricity and scratch resistance cannot be obtained, and if it exceeds 5 parts by weight, the surface haze of the coating film is undesirably high.
- the coating composition can further contain an aliphatic wax.
- the content is preferably 0.5 to 30% by weight, more preferably 1 to 10% by weight. If the content is less than 0.5% by weight, lubricity of the film surface may not be obtained, which is not preferable. If the content is more than 30% by weight, the adhesion to the polyester film substrate and the easy adhesion to a hard coat or an adhesive may be insufficient, which is not preferable.
- aliphatic waxes include carnauba wax, candelilla wax, rice wax, wood wax, hohopa, oil, palm wax, rosin-modified wax, polycuric wax Plant waxes such as sugar, sugarcane wax, esbalt wax, bark wax, animal waxes such as beeswax, lanolin, whale wax, Ibota wax, shellac wax, mineral waxes such as montan wax, ozokerite, and ceresin wax, paraffin wax And petroleum waxes such as microcrystalline phosphorus wax and petrolactam, and synthetic hydrocarbon waxes such as Fischer-Tropsch wax, polyethylene wax, polyethylene oxide wax, polypropylene wax and polypropylene oxide wax.
- carnauba wax, paraffin wax, and polyethylene wax are particularly preferred because of their good adhesion to hard coats and pressure-sensitive adhesives, and good lubricity. These are preferably used as aqueous dispersions because they can reduce the environmental load and are easy to handle.
- the coating layer can be formed by applying a coating composition in the form of an aqueous coating solution onto a polyester film to form a coating film and solidifying the coating film.
- the aqueous coating solution is preferably in the form of an aqueous solution, aqueous dispersion or emulsion.
- a resin other than the above-described composition for example, an antistatic agent, a coloring agent, a surfactant, an ultraviolet absorber, or a crosslinking agent may be added as necessary.
- the coating composition concentration (solid content concentration) of the aqueous coating solution used for forming a coating film is preferably 20% by weight or less, more preferably 1 to 10% by weight.
- the concentration is less than 1% by weight, the coatability on the polyester film may be insufficient, and if it exceeds 20% by weight, the stability of the aqueous coating solution and the appearance of the coating layer may deteriorate, which is preferable. I don't.
- the application of the aqueous coating solution to the polyester film can be carried out at any stage, but is preferably carried out in the course of the production of the polyester film. It is preferably applied to the surface.
- the polyester film before the completion of the crystal orientation includes an unstretched film, a uniaxially oriented film in which the unstretched film is oriented in either the longitudinal direction or the transverse direction, or a biaxial film in the longitudinal and transverse directions.
- Film stretched at low magnification final Biaxially stretched film before the orientation crystallization is completed by re-stretching the film in the machine direction or the transverse direction.
- an aqueous coating solution of the coating composition is applied to an unstretched film or a uniaxially oriented film which is oriented in one direction, and then subjected to longitudinal stretching and Z or transverse stretching and heat fixing to form a coating layer. Is preferred.
- the film surface When applying an aqueous coating solution to a film, the film surface should be subjected to physical treatment such as corona surface treatment, flame treatment, plasma treatment, etc. as a preliminary treatment to improve coatability, or it may be chemically treated with the composition. It is preferable to use an inactive surfactant in combination.
- Such a surfactant enhances the function of promoting wetting of the aqueous coating solution onto the polyester film and improves the stability of the coating solution.
- examples thereof include polyoxyethylene mono-J3 fatty acid ester, sorbitan fatty acid ester, Examples include ionic and nonionic surfactants such as glycerin fatty acid esters, fatty acid metal stones, alkyl sulfates, alkyl sulfonates, and alkyl sulfosuccinates.
- the surfactant is preferably contained in an amount of 1 to 10 parts by weight per 100 parts by weight of the coating composition of the aqueous coating solution.
- the amount of the aqueous coating liquid applied is preferably such that the thickness of the coating film is in the range of 0.4 to 0.5 m, preferably 0.05 to 0.4 m. If the thickness is too thin, the adhesive strength may be insufficient or fine particles may be lost, which is not preferable. Excessive thickness may cause blocking or increase the haze value, which is not preferable.
- any known coating method can be applied.
- a roll coating method, a gravure coating method, a roll brushing method, a spray coating method, an air knife coating method, an impregnation method, and a curtain coating method can be used alone or in combination.
- the coating layer may be formed on only one side of the film or on both sides as necessary. When the coating layer is formed on both sides, even if one side is processed into a hard coat or the like having a flat surface, the winding property is good without being changed, which is preferable.
- the total haze value is preferably 1.5% or less It is.
- the surface haze value of the coating layer is preferably 0.60% or less, and the friction coefficient (S) of the surface is preferably 0.4 or less.
- Such a laminated polyester film can be obtained by forming a coating layer comprising the above-mentioned coating composition on a polyester film.
- a pin with a 6mm diameter hard chrome plated pin is fixed, and a film cut to 20cm in the longitudinal direction and 15mm in the width direction is brought into contact with the pin at 90 °, and a constant length at a constant speed (20mm / s) (20 cm) was slid on the pin for 10 reciprocations to evaluate the degree of scratches entering the film surface.
- the haze value of the film was measured using a haze measuring device (NDH-22000) manufactured by Nippon Denshoku Industries Co., Ltd.
- a haze measuring device (NDH-200000) manufactured by Nippon Denshoku Industries Co., Ltd. was used.
- the haze value of the two superposed films, in which the surface haze of the film surfaces superposed with each other using the soda oil is cancelled, is measured, and the surface haze is calculated from the following equation. I asked.
- a hard coat layer with a thickness of 10 was formed on the coating surface of the easily adhesive polyester film, cross-cut in a grid (100 squares of 1 mm 2 ), and a 24-mm cellophane tape (Nichiban) was placed on top.
- a 24-mm cellophane tape Naichiban
- a PSA layer with a thickness of 20 im is formed on the surface of the easy-adhesive polyester film on which the coating film is formed, and the PSA layer surface is affixed to the float glass.
- One day in an atmosphere of 23 ° C and 65% RH The adhesive was peeled at a peel angle of 90 °, and the adhesive state (PSA) was observed on the glass surface, and evaluated according to the following criteria.
- the pressure-sensitive adhesive contains urethane-containing acrylate copolymer (acrylic component is n-butyl acrylate (86 mol%) and methyl acrylate (14 mol%)). Using.
- PSA Residual area of PSA (PSA) is less than 10% ⁇ Excellent adhesion of '...'
- Adhesive (PSA) residual area is 10% or more and less than 20% ⁇ '...-' ⁇ Good adhesion
- PSA Residual area of PSA (PSA) 20% or more and less than 30% ⁇ '... "Adhesive strength is slightly good
- PSA Adhesive
- the two films subjected superposed in contact coating film forming faces, on which the pressure of 0. 6 kg / cm 2 over 60 ° C, 80% 17 hours in an atmosphere of RH, then peeling Then, the blocking resistance was evaluated based on the peeling force according to the following criteria.
- Approximately 1 Omg of the sample is sealed in an aluminum pan for measurement and Attach it to 25 ° C from 20 ° C to 300 ° C at a speed of 20 ° C, hold at 300 ° C for 5 minutes, remove, and immediately place on ice And quenched.
- the pan was mounted on a differential calorimeter again, and the temperature was raised at a rate of 25 ° C to 20 ° CZ to measure the glass transition temperature (Tg: ° C).
- Intrinsic viscosities [??] d 1 / g) were measured with a 0-cloth phenol solution at 25 ° C.
- the particle size of the fine particles was measured by a laser diffraction type particle size distribution analyzer (SALD-7000, manufactured by Shimadzu Corporation).
- the evaluation was performed according to the following criteria.
- ⁇ Scratch resistance is 4, surface haze is 0.60 or less, coefficient of friction (Lis) is 0.4 or less, adhesion to hard coat and adhesive is 4 or more, and surface roughness (Ra) is 10 nm.
- the rating of ⁇ with blocking resistance is ⁇ (overall rating ⁇ good)
- ⁇ Scratch resistance is 3, scratch on surface is 0.60 or less, coefficient of friction (S) is 0.4 or less, adhesion to hard coat and adhesive is 3 or more, and surface roughness (Ra) is 1 Onm or less, the blocking resistance is poor, and the evaluation is poor (overall rating: somewhat good)
- X scratch resistance of 2 or less, surface haze of 0.60 or more, coefficient of friction (s) of 0.4 or more, adhesion to hard coat and adhesive of 2 or less, surface roughness
- (Ra) is 10 nm or more and the anti-blocking property is any of X.
- the evaluation is X. (Comprehensive evaluation ⁇ Poor)
- the coated film was subsequently dried at 95 ° C, stretched 3.6 times at 130 ° C in the transverse direction, shrunk 3% in the width direction at 230 ° C, and heat-fixed to a thickness of 100 m.
- a laminated film was obtained.
- the thickness of the coating layer was 0.15 m.
- a laminated film was obtained in the same manner as in Example 1 except that an aqueous coating solution (solid content concentration: 5%) of a coating composition comprising the components shown in Table 2 was used.
- the thickness of the coating layer was 0.15 m. table 1
- Polyester 1 The details of each component used in Tables 1 and 2 are as follows. Polyester 1:
- the acid component is composed of 90 mol% of terephthalic acid / 5 mol% of isophthalic acid / 5 mol% of 5-sodium sulfoisophthalic acid
- the polyester was produced as follows according to the method described in Example 1 of JP-A-06-116487.
- polyester 1 was manufactured as follows. That is, 2,4-naphthylene diphenyl phthalate (44 parts), dimethyl isophthalate (16 parts), 5-sodium sulfoisophthalate (4 parts), ethylene glycol (33 parts), and diethylene glycol (2 parts) were placed in a reactor.
- acryl was produced as follows according to the methods described in Production Examples 1 to 3 of JP-A-63-37167. That is, in a four-necked flask, 302 parts of ion-exchanged water was charged and heated to 60 ° C in a nitrogen stream, and then 0.5 parts of ammonium persulfate and 0.2 parts of sodium hydrogen nitrite were used as polymerization initiators.
- urethane resin was prepared.
- the urethane resin has a solid content of 90% by weight and the wetting agent polyoxyethylene lauryl ether has a solid content of 10% by weight.
- Fine particles 1 1:
- Silica / acrylic composite fine particles (Average particle size: 1, 20 Onm) (Solios Yuichi 12 by Nippon Shokubai Co., Ltd.)
- Acrylic filler (average particle size: 140nm) (Nippei Microgel E—6000, manufactured by Nippon Paint Co., Ltd.)
- Arbitrary organic inorganic composite particles were prepared according to Production Examples A1 to A6 of JP-A-10-237348.
- Organic-inorganic composite particles in which methacrylate-based acryl resin is coated on core particles of gay oxide (average particle size: 40 Onm, core particle size: 200)
- Arbitrary organic inorganic composite particles were prepared according to Production Examples A1 to A6 of JP-A-10-237348.
- Organic-inorganic composite particles in which silicon oxide is coated on core particles mainly composed of methacrylate and divinylbenzene (average particle size: 300 nm, core particle size: 150 belly)
- an arbitrary organic-inorganic composite particle is prepared by using a particle mainly composed of oxyzirconium oxide having a pore structure as a core particle.
- Organic / inorganic composite particles chemically fixed by incorporating acrylic resin mainly composed of methyl acrylate into particles having a pore structure mainly composed of zirconium oxide (average particle size: 350 nm)
- organic-inorganic composite particles were prepared by using titanium oxide-based particles having a pore structure as core particles.
- Organic-inorganic composite particles (average particle size: 350 nm) chemically fixed with particles of methacrylate-based acryl resin incorporated into particles having a pore structure mainly composed of titanium oxide Fine particles 7:
- Fine particles 8 are fine particles 8:
- the film of the present invention is useful as a base film for various optical applications, particularly for prism lens sheets, sunset panels, backlights, plasma displays, organic EL displays, etc., a base film for anti-reflection films, and an explosion-proof base film for displays. is there.
Abstract
Description
Claims
Priority Applications (5)
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EP20050745935 EP1767567B1 (en) | 2004-05-28 | 2005-05-25 | Multilayer polyester film and method for producing same |
JP2006514016A JP4597127B2 (ja) | 2004-05-28 | 2005-05-25 | 積層ポリエステルフィルムおよびその製造法 |
US11/597,710 US7659006B2 (en) | 2004-05-28 | 2005-05-25 | Laminated polyester film and manufacturing process thereof |
CN2005800173298A CN1961032B (zh) | 2004-05-28 | 2005-05-25 | 积层聚酯薄膜及其制造方法 |
KR1020067023236A KR101169623B1 (ko) | 2004-05-28 | 2005-05-25 | 적층 폴리에스테르 필름 및 그 제조법 |
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WO2005116120A1 true WO2005116120A1 (ja) | 2005-12-08 |
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PCT/JP2005/010006 WO2005116120A1 (ja) | 2004-05-28 | 2005-05-25 | 積層ポリエステルフィルムおよびその製造法 |
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US (1) | US7659006B2 (ja) |
EP (1) | EP1767567B1 (ja) |
JP (1) | JP4597127B2 (ja) |
CN (1) | CN1961032B (ja) |
TW (1) | TW200603992A (ja) |
WO (1) | WO2005116120A1 (ja) |
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JP2010069868A (ja) * | 2008-08-21 | 2010-04-02 | Teijin Dupont Films Japan Ltd | グリーンシート成形用キャリヤーフィルム |
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- 2005-05-25 CN CN2005800173298A patent/CN1961032B/zh active Active
- 2005-05-25 WO PCT/JP2005/010006 patent/WO2005116120A1/ja active Application Filing
- 2005-05-25 EP EP20050745935 patent/EP1767567B1/en active Active
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JP2009143226A (ja) * | 2007-11-22 | 2009-07-02 | Toyobo Co Ltd | 光学用易接着性ポリエステルフィルム及び光学用積層ポリエステルフィルム |
JP4661946B2 (ja) * | 2007-11-22 | 2011-03-30 | 東洋紡績株式会社 | 光学用易接着性ポリエステルフィルム及び光学用積層ポリエステルフィルム |
JP2011133890A (ja) * | 2007-11-22 | 2011-07-07 | Toyobo Co Ltd | 光学用易接着性ポリエステルフィルム及び光学用積層ポリエステルフィルム |
JP2010069868A (ja) * | 2008-08-21 | 2010-04-02 | Teijin Dupont Films Japan Ltd | グリーンシート成形用キャリヤーフィルム |
WO2010134416A1 (ja) * | 2009-05-22 | 2010-11-25 | 東洋紡績株式会社 | 光学用易接着性ポリエステルフィルム |
JP2011005858A (ja) * | 2009-05-22 | 2011-01-13 | Toyobo Co Ltd | 光学用易接着性ポリエステルフィルム |
JP2011161696A (ja) * | 2010-02-07 | 2011-08-25 | Mitsubishi Plastics Inc | 積層ポリエステルフィルム |
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JP2012006985A (ja) * | 2010-06-22 | 2012-01-12 | Mitsubishi Plastics Inc | 積層ポリエステルフィルム |
JP2016060883A (ja) * | 2014-09-19 | 2016-04-25 | 東洋インキScホールディングス株式会社 | 活性エネルギー線重合性樹脂組成物、及びそれを用いてなる積層体 |
WO2018062550A1 (ja) * | 2016-09-30 | 2018-04-05 | 株式会社日本触媒 | 塗料用水性樹脂組成物 |
JPWO2018062550A1 (ja) * | 2016-09-30 | 2019-08-29 | 株式会社日本触媒 | 塗料用水性樹脂組成物 |
Also Published As
Publication number | Publication date |
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CN1961032A (zh) | 2007-05-09 |
US20070184262A1 (en) | 2007-08-09 |
TW200603992A (en) | 2006-02-01 |
CN1961032B (zh) | 2010-06-16 |
JPWO2005116120A1 (ja) | 2008-04-03 |
EP1767567A4 (en) | 2009-05-27 |
US7659006B2 (en) | 2010-02-09 |
TWI363688B (ja) | 2012-05-11 |
JP4597127B2 (ja) | 2010-12-15 |
EP1767567A1 (en) | 2007-03-28 |
EP1767567B1 (en) | 2012-06-20 |
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