WO2018123694A1 - 表面保護フィルム - Google Patents

表面保護フィルム Download PDF

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Publication number
WO2018123694A1
WO2018123694A1 PCT/JP2017/045347 JP2017045347W WO2018123694A1 WO 2018123694 A1 WO2018123694 A1 WO 2018123694A1 JP 2017045347 W JP2017045347 W JP 2017045347W WO 2018123694 A1 WO2018123694 A1 WO 2018123694A1
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WIPO (PCT)
Prior art keywords
meth
separator
acrylate
pressure
sensitive adhesive
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PCT/JP2017/045347
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English (en)
French (fr)
Japanese (ja)
Inventor
奈津子 渡部
数馬 三井
崇弘 野中
Original Assignee
日東電工株式会社
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Priority to CN201780081267.XA priority Critical patent/CN110168036B/zh
Priority to KR1020197021703A priority patent/KR102364205B1/ko
Publication of WO2018123694A1 publication Critical patent/WO2018123694A1/ja

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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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/023—Optical properties
    • 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
    • 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
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/06—Interconnection of layers permitting easy separation
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • C09J133/00—Adhesives 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; Adhesives based on derivatives of such polymers
    • 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
    • C09J133/00—Adhesives 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; Adhesives based on derivatives of such polymers
    • C09J133/04—Homopolymers or copolymers of esters
    • 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
    • C09J201/00—Adhesives based on unspecified macromolecular compounds
    • 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
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • 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
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/40—Adhesives in the form of films or foils characterised by release liners
    • 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
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/40—Adhesives in the form of films or foils characterised by release liners
    • C09J7/405—Adhesives in the form of films or foils characterised by release liners characterised by the substrate of the release liner
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • 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
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0264—Polyester
    • 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
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
    • 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
    • C09J2400/00—Presence of inorganic and organic materials
    • C09J2400/20—Presence of organic materials
    • C09J2400/24—Presence of a foam

Definitions

  • the present invention relates to an optical surface protective film with a separator.
  • an adhesive constituting an optical surface protective film used for protecting the surface of an optical member (for example, a polarizing plate, a wave plate, a retardation plate, an optical compensation film, a reflection sheet, a brightness enhancement film, etc. used in a liquid crystal display).
  • an optical member for example, a polarizing plate, a wave plate, a retardation plate, an optical compensation film, a reflection sheet, a brightness enhancement film, etc. used in a liquid crystal display.
  • the surface protective film generally has a configuration in which an adhesive layer is provided on a film-like base film (support). Such a surface protective film is bonded to an optical member as an adherend through the pressure-sensitive adhesive layer, and is used for the purpose of protecting the optical member from scratches and dirt on the surface during processing, transportation, inspection, and the like. It is done.
  • a panel of a liquid crystal display is formed by bonding an optical member such as a polarizing plate or a wave plate to a liquid crystal cell via an adhesive layer.
  • Such a pressure-sensitive adhesive layer is protected and stored by a release-treated separator or the like from the necessity of protection from drying or the like before being actually attached to an optical member (Patent Document 1).
  • the separator is peeled off and removed.
  • An object of the present invention is to provide an optical surface protective film with a separator that can suppress generation and has excellent inspection properties.
  • the optical surface protective film with a separator of the present invention has an optical surface protective film having an adhesive layer on at least one side of the substrate film, and a surface opposite to the surface in contact with the adhesive layer of the substrate film.
  • a separator-containing optical surface protective film having a separator wherein the separator has a release layer and a polyester-based substrate, the polyester-based substrate has a cavity, and the thickness of the polyester-based substrate Is 25 to 100 ⁇ m, and the 180 ° trigger peel force of the separator to the pressure-sensitive adhesive layer is 0.7 N / 50 mm or less.
  • the optical surface protective film with a separator of the present invention preferably has a void ratio of 15% or more with respect to the volume of the polyester base material.
  • the base film is preferably a polyester film.
  • the pressure-sensitive adhesive layer is preferably formed from a pressure-sensitive adhesive composition containing a (meth) acrylic polymer.
  • This invention specifies the thickness of the polyester-type base material which comprises the separator laminated
  • An optical surface protective film with a separator disclosed herein is generally a pressure-sensitive adhesive layer surface in a form called an adhesive tape, an adhesive label, an adhesive film, or the like. Is protected by a separator, and in particular, surface protection that protects the surface of optical components during processing, inspection, and transportation of optical components (for example, optical components used as liquid crystal display panel components such as polarizing plates and wave plates). Suitable as a film.
  • the pressure-sensitive adhesive layer in the surface protective film is typically formed continuously, but is not limited to such a form, and is formed in a regular or random pattern such as a spot or stripe. It may be an adhesive layer.
  • the surface protective film disclosed herein may be in the form of a roll or a single sheet.
  • the optical surface protective film which comprises the optical surface protective film with a separator of this invention has a base film, It is characterized by the above-mentioned.
  • the resin material constituting the base film can be used without any particular limitation. For example, transparency, mechanical strength, thermal stability, moisture shielding property, isotropic property, It is preferable to use a material excellent in properties such as flexibility and dimensional stability.
  • the pressure-sensitive adhesive composition can be applied by a roll coater or the like, and can be wound up into a roll shape, which is useful.
  • the base film (support) examples include polyester polymers such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), and polybutylene terephthalate; cellulose polymers such as diacetyl cellulose and triacetyl cellulose; polycarbonate polymers; An acrylic polymer such as polymethyl methacrylate; and the like, a plastic film composed of a resin material having a main resin component (a main component of the resin component, typically a component occupying 50% by weight or more), It can be preferably used as a film.
  • polyester polymers such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), and polybutylene terephthalate
  • cellulose polymers such as diacetyl cellulose and triacetyl cellulose
  • polycarbonate polymers An acrylic polymer such as polymethyl methacrylate
  • An acrylic polymer such as polymethyl methacrylate; and the like
  • the resin material examples include styrene polymers such as polystyrene and acrylonitrile-styrene copolymers; olefin polymers such as polyethylene, polypropylene, polyolefins having a cyclic or norbornene structure, and ethylene-propylene copolymers; Examples of the resin material include vinyl chloride polymers; amide polymers such as nylon 6, nylon 6,6, and aromatic polyamide. Still other examples of the resin material include imide polymers, sulfone polymers, polyether sulfone polymers, polyether ether ketone polymers, polyphenylene sulfide polymers, vinyl alcohol polymers, vinylidene chloride polymers, vinyl butyral polymers. , Arylate polymers, polyoxymethylene polymers, epoxy polymers and the like. A base film made of a blend of two or more of the above-described polymers may be used.
  • the base film a plastic film made of a transparent thermoplastic resin material can be preferably used.
  • the plastic films it is more preferable to use a polyester film.
  • the polyester film includes a polyester polymer material (polyester resin) having a main skeleton based on an ester bond such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate, or the like as a main resin component.
  • PET polyethylene terephthalate
  • PEN polyethylene naphthalate
  • polybutylene terephthalate or the like as a main resin component.
  • Such a polyester film has preferable characteristics as a base film for a surface protective film, such as excellent optical characteristics and dimensional stability.
  • various additives such as an antioxidant, an ultraviolet absorber, a plasticizer, and a colorant (pigment, dye, etc.) may be blended as necessary.
  • a known or conventional surface treatment such as corona discharge treatment, plasma treatment, ultraviolet irradiation treatment, acid treatment, alkali treatment, and application of a primer may be performed.
  • Such surface treatment can be, for example, a treatment for improving the adhesion between the base film and the pressure-sensitive adhesive layer (the anchoring property of the pressure-sensitive adhesive layer).
  • the substrate film It is also possible to use a plastic film that has been subjected to antistatic treatment as the substrate film.
  • Use of the base film is preferable because charging of the surface protective film itself when peeled can be suppressed.
  • the base film is a plastic film, and an antistatic treatment is performed on the plastic film, so that the surface protection film itself can be reduced in charge and can have an excellent antistatic ability on the adherend.
  • a conventionally well-known method can be used, for example, antistatic resin which consists of an antistatic agent and a resin component, a conductive polymer, and a conductive substance. Examples thereof include a method of applying a conductive resin, a method of depositing or plating a conductive material, a method of kneading an antistatic agent, and the like.
  • the thickness of the substrate film is usually about 5 to 200 ⁇ m, preferably about 10 to 100 ⁇ m.
  • the thickness of the base film is within the above range, it is preferable because it is excellent in bonding workability to the adherend, peelability from the adherend and workability.
  • the surface protective film disclosed herein may be implemented in an embodiment that further includes other layers in addition to the base film, the pressure-sensitive adhesive layer, and the separator.
  • the other layer include an undercoat layer (anchor layer) that improves the anchoring property of the antistatic layer and the pressure-sensitive adhesive layer.
  • the pressure-sensitive adhesive layer used in the present invention can be used without particular limitation as long as it is formed from a pressure-sensitive adhesive composition containing a pressure-sensitive adhesive polymer.
  • the pressure-sensitive adhesive composition include acrylic pressure-sensitive adhesives, urethane-based pressure-sensitive adhesives, synthetic rubber-based pressure-sensitive adhesives, natural rubber-based pressure-sensitive adhesives, silicone-based pressure-sensitive adhesives, and polyester-based pressure-sensitive adhesives.
  • the contained pressure-sensitive adhesive composition is a particularly preferred embodiment.
  • the (meth) acrylic polymer which is a pressure-sensitive polymer constituting the acrylic pressure-sensitive adhesive
  • the (meth) acrylic polymer is an alkyl having 1 to 14 carbon atoms as a raw material monomer constituting the pressure-sensitive adhesive layer.
  • a (meth) acrylic monomer having a group can be used as the main monomer.
  • As said (meth) acrylic-type monomer 1 type (s) or 2 or more types can be used.
  • the (meth) acrylic polymer refers to an acrylic polymer and / or a methacrylic polymer
  • the (meth) acrylate refers to acrylate and / or methacrylate.
  • the (meth) acrylic monomer having an alkyl group having 1 to 14 carbon atoms include, for example, methyl (meth) acrylate, ethyl (meth) acrylate, n-butyl (meth) acrylate, s-butyl (meth) ) Acrylate, t-butyl (meth) acrylate, isobutyl (meth) acrylate, hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, n-octyl (meth) acrylate, isooctyl (meth) acrylate, n-nonyl ( (Meth) acrylate, isononyl (meth) acrylate, n-decyl (meth) acrylate, isodecyl (meth) acrylate, n-dodecyl (meth) acrylate, n-tridecyl (
  • a (meth) acrylic monomer having an alkyl group having 4 to 14 carbon atoms, such as acrylate is preferred.
  • by using a (meth) acrylic monomer having an alkyl group having 4 to 14 carbon atoms, such as acrylate is preferred.
  • a hydroxyl group-containing (meth) acrylic monomer can be used as a raw material monomer.
  • hydroxyl group containing (meth) acrylic-type monomer 1 type (s) or 2 or more types can be used.
  • hydroxyl group-containing (meth) acrylic monomer examples include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, and 6-hydroxyhexyl (meth) acrylate. , 8-hydroxyoctyl (meth) acrylate, 10-hydroxydecyl (meth) acrylate, 12-hydroxylauryl (meth) acrylate, (4-hydroxymethylcyclohexyl) methyl acrylate, N-methylol (meth) acrylamide, etc. .
  • the hydroxyl group-containing (meth) acrylic monomer is preferably contained in an amount of 25% by weight or less, more preferably 15% by weight or less, based on 100% by weight of the total amount of monomer components constituting the (meth) acrylic polymer. More preferably, the content is 0.1 to 10% by weight. Within the above range, the balance between the wettability of the pressure-sensitive adhesive composition and the cohesive force of the resulting pressure-sensitive adhesive layer can be easily controlled, which is preferable.
  • the glass transition temperature and release of the (meth) acrylic polymer should be adjusted so that the Tg is 0 ° C. or lower (usually ⁇ 100 ° C. or higher) because the adhesive performance is easily balanced.
  • a polymerizable monomer or the like for adjusting the property can be used as long as the effects of the present invention are not impaired.
  • the (meth) acrylic polymer can use a carboxyl group-containing (meth) acrylic monomer as a raw material monomer.
  • the pressure-sensitive adhesive layer surface protective film
  • the pressure-sensitive adhesive layer can be prevented from increasing in adhesive strength over time, re-peelability, adhesive strength-increasing property, and work Excellent in properties.
  • it is excellent in shearing force and is preferable.
  • carboxyl group-containing (meth) acrylic monomer examples include (meth) acrylic acid, carboxylethyl (meth) acrylate, carboxylpentyl (meth) acrylate, and the like.
  • the carboxyl group-containing (meth) acrylic monomer is preferably 10% by weight or less, preferably 0 to 8% by weight with respect to 100% by weight of the total amount of monomer components constituting the (meth) acrylic polymer. Is more preferably 0 to 6% by weight. Within the above range, the balance between the wettability of the pressure-sensitive adhesive composition and the cohesive force of the resulting pressure-sensitive adhesive layer can be easily controlled, which is preferable.
  • the (meth) acrylic polymer can be used without any particular limitation as long as other polymerizable monomers other than the raw material monomer are within the range not impairing the characteristics of the present invention.
  • a cohesive force / heat resistance improving component such as a cyano group-containing monomer, vinyl ester monomer, aromatic vinyl monomer, amide group-containing monomer, imide group-containing monomer, amino group-containing monomer, epoxy
  • a component having a functional group that functions as a crosslinking base point can be used as appropriate, such as a group-containing monomer, N-acryloylmorpholine, vinyl ether monomer, and the like.
  • a nitrogen-containing monomer such as a cyano group-containing monomer, an amide group-containing monomer, an imide group-containing monomer, an amino group-containing monomer, and N-acryloylmorpholine.
  • a nitrogen-containing monomer is useful because it can ensure an appropriate peeling force (adhesive strength) that does not cause floating or peeling, and can provide a surface protective film having excellent shearing force.
  • These polymerizable monomers can be used alone or in combination of two or more.
  • Examples of the cyano group-containing monomer include acrylonitrile and methacrylonitrile.
  • Examples of the amide group-containing monomer include acrylamide, methacrylamide, diethylacrylamide, N-vinylpyrrolidone, N, N-dimethylacrylamide, N, N-dimethylmethacrylamide, N, N-diethylacrylamide, and N, N-diethyl.
  • Examples include methacrylamide, N, N′-methylenebisacrylamide, N, N-dimethylaminopropyl acrylamide, N, N-dimethylaminopropyl methacrylamide, and diacetone acrylamide.
  • Examples of the imide group-containing monomer include cyclohexylmaleimide, isopropylmaleimide, N-cyclohexylmaleimide, and itaconimide.
  • amino group-containing monomer examples include aminoethyl (meth) acrylate, N, N-dimethylaminoethyl (meth) acrylate, N, N-dimethylaminopropyl (meth) acrylate, and the like.
  • Examples of the vinyl ester monomer include vinyl acetate, vinyl propionate, and vinyl laurate.
  • aromatic vinyl monomer examples include styrene, chlorostyrene, chloromethyl styrene, ⁇ -methyl styrene, and other substituted styrene.
  • epoxy group-containing monomer examples include glycidyl (meth) acrylate, methyl glycidyl (meth) acrylate, and allyl glycidyl ether.
  • vinyl ether monomer examples include methyl vinyl ether, ethyl vinyl ether, isobutyl vinyl ether, and the like.
  • the other polymerizable monomer is preferably 0 to 30% by weight, and preferably 0 to 10% by weight, based on 100% by weight of the total amount of monomer components constituting the (meth) acrylic polymer. It is more preferable.
  • the other polymerizable monomers can be appropriately adjusted in order to obtain desired characteristics.
  • the (meth) acrylic polymer may further contain an alkylene oxide group-containing reactive monomer as a monomer component.
  • the average addition mole number of the oxyalkylene unit of the alkylene oxide group-containing reactive monomer is preferably 1 to 40, and preferably 3 to 40 from the viewpoint of compatibility with the oxyalkylene group-containing compound. Is more preferably 4 to 35, and particularly preferably 5 to 30.
  • the average added mole number is 1 or more, the effect of reducing the contamination of the adherend (protected body) tends to be obtained efficiently.
  • the said average added mole number is larger than 40, since interaction with an oxyalkylene group containing compound is large and there exists a tendency for the viscosity of an adhesive composition to rise and for coating to become difficult, it is unpreferable.
  • the terminal of the oxyalkylene chain may be a hydroxyl group or may be substituted with another functional group.
  • the alkylene oxide group-containing reactive monomer may be used alone or in combination of two or more, but the total content is the total amount of monomer components of the (meth) acrylic polymer. Among them, 0 to 20% by weight is preferable, and 0 to 10% by weight is more preferable. When the content of the alkylene oxide group-containing reactive monomer exceeds 20% by weight, the contamination on the adherend deteriorates, which is not preferable.
  • Examples of the oxyalkylene unit of the alkylene oxide group-containing reactive monomer include those having an alkylene group having 1 to 6 carbon atoms, such as an oxymethylene group, an oxyethylene group, an oxypropylene group, and an oxybutylene group. It is done.
  • the hydrocarbon group of the oxyalkylene chain may be linear or branched.
  • the alkylene oxide group-containing reactive monomer is a reactive monomer having an ethylene oxide group.
  • a reactive monomer-containing (meth) acrylic polymer having an ethylene oxide group as a base polymer, the compatibility between the base polymer and the oxyalkylene group-containing compound is improved, and bleeding to the adherend is suitably suppressed, A low-contamination pressure-sensitive adhesive composition is obtained.
  • alkylene oxide group-containing reactive monomer examples include (meth) acrylic acid alkylene oxide adducts and reactive surfactants having reactive substituents such as acryloyl group, methacryloyl group, and allyl group in the molecule. can give.
  • the (meth) acrylic acid alkylene oxide adduct include, for example, polyethylene glycol (meth) acrylate, polypropylene glycol (meth) acrylate, polyethylene glycol-polypropylene glycol (meth) acrylate, polyethylene glycol-polybutylene glycol (meth) ) Acrylate, polypropylene glycol-polybutylene glycol (meth) acrylate, methoxy polyethylene glycol (meth) acrylate, ethoxy polyethylene glycol (meth) acrylate, butoxy polyethylene glycol (meth) acrylate, octoxy polyethylene glycol (meth) acrylate, lauroxy polyethylene Glycol (meth) acrylate, stearoxy polyethylene glycol Lumpur (meth) acrylate, phenoxy polyethylene glycol (meth) acrylate, methoxy polypropylene glycol (meth) acrylate, octoxypolyethylene glycol - polyprop
  • the reactive surfactant include, for example, an anionic reactive surfactant having a (meth) acryloyl group or an allyl group, a nonionic reactive surfactant, and a cationic reactive surfactant. Can be given.
  • the (meth) acrylic polymer preferably has a weight average molecular weight (Mw) of 100,000 to 5,000,000, more preferably 200,000 to 4,000,000, still more preferably 300,000 to 3,000,000, and most preferably 300,000 to 1,200,000. It is.
  • Mw weight average molecular weight
  • the adhesive force tends to be generated due to the reduced cohesive force of the pressure-sensitive adhesive layer.
  • the weight average molecular weight exceeds 5,000,000, the fluidity of the polymer is lowered, the wetness to the adherend (for example, polarizing plate) becomes insufficient, and the adherend and the pressure-sensitive adhesive layer of the surface protective film It tends to cause blisters that occur during the period.
  • a weight average molecular weight means what was obtained by measuring by GPC (gel permeation chromatography).
  • the glass transition temperature (Tg) of the (meth) acrylic polymer is preferably 0 ° C. or lower, more preferably ⁇ 10 ° C. or lower (usually ⁇ 100 ° C. or higher).
  • the glass transition temperature is higher than 0 ° C., the polymer does not flow easily, for example, the wettability to the polarizing plate which is an optical member becomes insufficient, and the swelling generated between the polarizing plate and the pressure-sensitive adhesive layer of the surface protective film There is a tendency to cause.
  • the glass transition temperature is ⁇ 70 ° C. or lower, an adhesive layer excellent in wettability to a polarizing plate and light release properties can be easily obtained.
  • the glass transition temperature of a (meth) acrylic-type polymer can be adjusted in the said range by changing the monomer component and composition ratio to be used suitably.
  • the polymerization method of the (meth) acrylic polymer is not particularly limited, and can be polymerized by known methods such as solution polymerization, emulsion polymerization, bulk polymerization, suspension polymerization, etc. From the viewpoint of characteristics such as low contamination to the adherend (protected body), solution polymerization is a more preferable embodiment. Further, the polymer obtained may be any of a random copolymer, a block copolymer, an alternating copolymer, a graft copolymer, and the like.
  • the pressure-sensitive adhesive composition used in the present invention can also contain an oxyalkylene group-containing compound.
  • an oxyalkylene group-containing compound By containing the oxyalkylene group-containing compound, it is possible to further develop light peelability.
  • the oxyalkylene group-containing compound include an organopolysiloxane having an oxyalkylene chain and an oxyalkylene group-containing compound not containing an organopolysiloxane.
  • organopolysiloxane having an oxyalkylene chain examples include specific examples of the organopolysiloxane having an oxyalkylene chain in the main chain, such as a commercial product, and trade names of X-22-4952, X-22. -4272, X-22-6266, KF-6004, KF-889 (above, manufactured by Shin-Etsu Chemical Co., Ltd.), BY16-201, SF8427 (above, made by Toray Dow Corning), IM22 (made by Asahi Kasei Wacker), etc. Is given.
  • organosiloxane having an oxyalkylene chain in the side chain examples include, for example, trade names KF-351A, KF-352A, KF-353, KF-354L, KF-355A, KF-615A, KF-945.
  • oxyalkylene group-containing compound not containing the organopolysiloxane examples include, for example, polyoxyalkylene alkylamine, polyoxyalkylene diamine, polyoxyalkylene fatty acid ester, polyoxyalkylene sorbitan fatty acid ester, polyoxyalkylene alkyl phenyl ether.
  • Nonionic surfactants such as polyoxyalkylene alkyl ether, polyoxyalkylene alkyl allyl ether, polyoxyalkylene alkyl phenyl allyl ether; polyoxyalkylene alkyl ether sulfate ester salt, polyoxyalkylene alkyl ether phosphate ester salt, Oxyalkylene alkylphenyl ether sulfate ester salt, polyoxyalkylene alkylphenyl ether phosphate Anionic surfactants such as salt of salts; other cationic surfactants having polyoxyalkylene chains (polyalkylene oxide chains), amphoteric surfactants, polyether compounds having polyoxyalkylene chains (and their Derivatives), acrylic compounds having a polyoxyalkylene chain (and derivatives thereof), and the like. Moreover, you may mix
  • Such polyoxyalkylene chain-containing compounds may
  • polyether compound (polyether component) having a polyoxyalkylene chain examples include a block copolymer of polypropylene glycol (PPG) -polyethylene glycol (PEG), a block copolymer of PPG-PEG-PPG, Examples thereof include a block copolymer of PEG-PPG-PEG.
  • the derivative of the polyether compound having a polyoxyalkylene chain include an oxypropylene group-containing compound (PPG monoalkyl ether, PEG-PPG monoalkyl ether, etc.) whose terminal is etherified, and oxypropylene whose terminal is acetylated Group-containing compounds (terminal acetylated PPG and the like), and the like.
  • the acrylic compound having a polyoxyalkylene chain include a (meth) acrylate polymer having an oxyalkylene group.
  • the oxyalkylene group has an addition mole number of oxyalkylene units of preferably 1 to 50, more preferably 2 to 30, and further preferably 2 to 20.
  • the terminal of the oxyalkylene chain may be a hydroxyl group, or may be substituted with an alkyl group, a phenyl group or the like.
  • the (meth) acrylate polymer having an oxyalkylene group is preferably a polymer containing (meth) acrylic acid alkylene oxide as a monomer component, and specific examples of the (meth) acrylic acid alkylene oxide include ethylene.
  • glycol group-containing (meth) acrylates include methoxy-polyethylene glycol (meth) acrylate types such as methoxy-diethylene glycol (meth) acrylate and methoxy-triethylene glycol (meth) acrylate, ethoxy-diethylene glycol (meth) acrylate, ethoxy -Ethoxy-polyethylene glycol (meth) acrylate type such as triethylene glycol (meth) acrylate, butoxy-diethylene glycol (meth) acrylate, buto Butoxy-polyethylene glycol (meth) acrylate type such as cy-triethylene glycol (meth) acrylate, phenoxy-polyethylene glycol (meth) acrylate type
  • the monomer component other monomer components other than the (meth) acrylic acid alkylene oxide can also be used.
  • specific examples of other monomer components include methyl (meth) acrylate, ethyl (meth) acrylate, n-butyl (meth) acrylate, s-butyl (meth) acrylate, t-butyl (meth) acrylate, and isobutyl (meth) acrylate.
  • the polyoxyalkylene chain-containing compound not containing the organopolysiloxane is a compound having at least a part of a (poly) ethylene oxide chain.
  • compatibility with the base polymer is improved, bleeding to the adherend is suitably suppressed, and a low-staining adhesive composition is obtained.
  • a PPG-PEG-PPG block copolymer is used, a pressure-sensitive adhesive excellent in low contamination can be obtained.
  • the weight of the (poly) ethylene oxide chain in the total polyoxyalkylene chain-containing compound not containing the organopolysiloxane is preferably 5 to 90% by weight, more preferably 5 to 85%. % By weight, more preferably 5 to 80% by weight, most preferably 5 to 75% by weight.
  • Examples of commercially available polyoxyalkylene chain-containing compounds that do not contain the organopolysiloxane include, for example, Adekapluronic 17R-4, Adekapluronic 25R-2 (all of which are manufactured by ADEKA), Latemul PD-420, LaterumPD -420, Latemul PD-450, Emulgen 120 (manufactured by Kao), Aqualon HS-10, KH-10, Neugen EA-87, EA-137, EA-157, EA-167, EA-177 (above, first Manufactured by Kogyo Seiyaku Co., Ltd.).
  • the content of the oxyalkylene group-containing compound is 0.01 to 5.5 with respect to 100 parts by weight of the adhesive polymer (main polymer, for example, (meth) acrylic polymer) constituting the adhesive composition.
  • 0 parts by weight is preferable, more preferably 0.02 to 2 parts by weight, still more preferably 0.03 to 1.6 parts by weight, and most preferably 0.1 to 0.8 parts by weight.
  • the pressure-sensitive adhesive composition preferably contains a crosslinking agent. Moreover, in this invention, it can be set as an adhesive layer using the said adhesive composition.
  • the pressure-sensitive adhesive composition is an acrylic pressure-sensitive adhesive containing the (meth) acrylic polymer
  • the constitutional unit, the structural ratio, the selection and addition ratio of the cross-linking agent, etc. are appropriately determined. By adjusting and crosslinking, a pressure-sensitive adhesive layer (surface protective film) having more excellent heat resistance can be obtained.
  • an isocyanate compound As the crosslinking agent used in the present invention, an isocyanate compound, an epoxy compound, a melamine resin, an aziridine derivative, a metal chelate compound, or the like may be used.
  • an isocyanate compound or an epoxy compound is a preferred embodiment.
  • these compounds may be used independently and may be used in mixture of 2 or more types.
  • isocyanate compounds include aliphatic polyisocyanates such as trimethylene diisocyanate, butylene diisocyanate, hexamethylene diisocyanate (HDI), dimer acid diisocyanate, cyclopentylene diisocyanate, cyclohexylene diisocyanate, isophorone diisocyanate (IPDI), 1, Alicyclic isocyanates such as 3-bis (isocyanatomethyl) cyclohexane, aromatic isocyanates such as 2,4-tolylene diisocyanate, 4,4′-diphenylmethane diisocyanate, xylylene diisocyanate (XDI), and the isocyanate compound Allophanate bond, biuret bond, isocyanurate bond, uretdione bond, urea bond, carbodiimide bond Uretonimine bond, polyisocynate modified products thereof obtained by modifying the like oxadiazinetrione bond
  • These isocyanate compounds may be used alone, or may be used in combination of two or more, and a bifunctional isocyanate compound and a trifunctional or higher isocyanate compound may be used in combination.
  • a cross-linking agent in combination, it is possible to achieve both tackiness and rebound resistance (adhesion to curved surfaces), and a pressure-sensitive adhesive layer (surface protective film) with better adhesion reliability can be obtained.
  • epoxy compound examples include N, N, N ′, N′-tetraglycidyl-m-xylenediamine (trade name: TETRAD-X, manufactured by Mitsubishi Gas Chemical Co., Ltd.) and 1,3-bis (N, N-dioxy). Glycidylaminomethyl) cyclohexane (trade name: TETRAD-C, manufactured by Mitsubishi Gas Chemical Company, Inc.).
  • Examples of the melamine resin include hexamethylol melamine.
  • Examples of the aziridine derivative include commercially available product names HDU, TAZM, TAZO (manufactured by Mutual Yakugyo Co., Ltd.) and the like.
  • metal chelate compound examples include aluminum, iron, tin, titanium, and nickel as metal components, and acetylene, methyl acetoacetate, and ethyl lactate as chelate components.
  • the content of the crosslinking agent used in the present invention is, for example, preferably 0.01 to 20 parts by weight, and 0.1 to 15 parts by weight with respect to 100 parts by weight of the (meth) acrylic polymer. More preferred is 0.5 to 10 parts by weight, still more preferred is 1 to 8 parts by weight.
  • the content is less than 0.01 parts by weight, the crosslinking formation by the crosslinking agent becomes insufficient, the cohesive force of the resulting pressure-sensitive adhesive layer becomes small, and sufficient heat resistance may not be obtained, It tends to cause glue residue.
  • the pressure-sensitive adhesive composition may further contain a cross-linking catalyst for causing any of the above-described cross-linking reactions to proceed more effectively.
  • cross-linking catalysts include tin-based catalysts such as dibutyltin dilaurate and dioctyltin dilaurate, tris (acetylacetonato) iron, tris (hexane-2,4-dionato) iron, tris (heptane-2,4-dionato).
  • Iron tris (heptane-3,5-dionato) iron, tris (5-methylhexane-2,4-dionato) iron, tris (octane-2,4-dionato) iron, tris (6-methylheptane-2) , 4-Dionato) iron, tris (2,6-dimethylheptane-3,5-dionato) iron, tris (nonane-2,4-dionato) iron, tris (nonane-4,6-dionato) iron, tris ( 2,2,6,6-tetramethylheptane-3,5-dionato) iron, tris (tridecan-6,8-dionato) iron, tris (1-phenylbutane-1, -Dionato) iron, tris (hexafluoroacetylacetonato) iron, tris (ethyl acetoacetate) iron, tris (acetoacetate-n-propyl) iron, tris (isopropy
  • the content of the crosslinking catalyst is not particularly limited, but is preferably about 0.0001 to 1 part by weight, for example, 0.001 to 0.5 parts per 100 parts by weight of the (meth) acrylic polymer. Part by weight is more preferred. Within the above range, when the pressure-sensitive adhesive layer is formed, the speed of the cross-linking reaction is high, and the pot life of the pressure-sensitive adhesive composition is lengthened.
  • the pressure-sensitive adhesive composition may contain other known additives, for example, powders such as lubricants, colorants, pigments, plasticizers, tackifiers, low molecular weight polymers, surface lubrication.
  • powders such as lubricants, colorants, pigments, plasticizers, tackifiers, low molecular weight polymers, surface lubrication.
  • optical surface protective film with separator is formed by forming the pressure-sensitive adhesive layer on at least one surface of a base film, and in that case, the pressure-sensitive adhesive composition is crosslinked. Although it is generally performed after application of the adhesive composition, it is also possible to transfer the adhesive layer comprising the crosslinked adhesive composition to a substrate film or the like.
  • the method for forming the pressure-sensitive adhesive layer on the base film is not particularly limited.
  • the pressure-sensitive adhesive layer is formed by applying the pressure-sensitive adhesive composition (solution) to the base film and removing the polymerization solvent by drying. It is produced by forming on a base film. Thereafter, curing may be performed for the purpose of adjusting the component transfer of the pressure-sensitive adhesive layer or adjusting the crosslinking reaction.
  • the pressure-sensitive adhesive composition contains at least one polymerization solvent other than the polymerization solvent so that the surface protective film can be uniformly applied. A new solvent may be added.
  • a known method used for producing pressure-sensitive adhesive tapes is used as a method for forming the pressure-sensitive adhesive layer when producing the surface protective film of the present invention. Specific examples include roll coating, gravure coating, reverse coating, roll brushing, spray coating, air knife coating, extrusion coating using a die coater, and the like.
  • the surface protective film of the present invention is usually prepared so that the thickness of the pressure-sensitive adhesive layer is 3 to 100 ⁇ m, preferably about 5 to 50 ⁇ m. It is preferable for the thickness of the pressure-sensitive adhesive layer to be within the above range because it is easy to obtain an appropriate balance between removability and adhesiveness.
  • the total thickness of the surface protective film of the present invention is preferably 8 to 300 ⁇ m, more preferably 10 to 200 ⁇ m, and most preferably 20 to 100 ⁇ m. Within the above range, the adhesive properties (removability, adhesiveness, etc.), workability, and appearance properties are excellent and a preferred embodiment is obtained.
  • the said total thickness means the sum total of the thickness containing all layers, such as a base film, an adhesive layer, a separator, and another layer.
  • the surface protective film of the present invention has a pressure-sensitive adhesive layer on at least one surface of the base film, and has a separator on the surface opposite to the surface in contact with the pressure-sensitive adhesive layer of the base film.
  • a release layer and a polyester base material the polyester base material has a cavity, the polyester base material has a thickness of 25 to 100 ⁇ m, and the separator is 180 ° to the pressure-sensitive adhesive layer.
  • the trigger peel force is 0.7 N / 50 mm or less.
  • the separator is used to bond the separator to the surface of the pressure-sensitive adhesive layer.
  • the separator has a specific thickness and a cavity, so that the stiffness of the separator itself can be increased. It can be kept low, has excellent releasability and workability when peeling the separator from the surface of the pressure-sensitive adhesive layer, and can provide cushioning due to cavities, such as glue dents that may occur after pressure-sensitive adhesive coating This is a preferred embodiment.
  • the polyester-based substrate (sometimes simply referred to as “substrate”) is not particularly limited as long as it is a polyester-based film that can protect the pressure-sensitive adhesive layer and has a cavity.
  • polyester-based film For example, polyethylene terephthalate film, polyethylene A naphthalate film, a polybutylene terephthalate film, etc. are mentioned.
  • the thickness of the polyester base material is 25 to 100 ⁇ m, preferably 30 to 80 ⁇ m, more preferably 40 to 70 ⁇ m. It is preferable for it to be in the above-mentioned range since it is excellent in workability for bonding to the pressure-sensitive adhesive layer, and peelability and workability for the pressure-sensitive adhesive layer. In addition, when the thickness of the base material exceeds 100 ⁇ m, the stiffness (rigidity) of the separator itself becomes strong, and the peelability and workability are inferior.
  • the surface of the polyester-based substrate can be subjected to various surface treatments such as corona discharge treatment or various surface treatments such as embossing as necessary. If necessary, fillers (inorganic fillers, organic fillers, etc.), anti-aging agents, antioxidants, UV absorbers, antistatic agents, lubricants, plasticizers, colorants (pigments, dyes, etc.), etc. These various additives may be blended.
  • the void ratio is preferably 15% (volume%) or more, more preferably 18% or more, and still more preferably 20% or more with respect to the volume of the polyester-based substrate.
  • a filler for example, polyethylene terephthalate (PET)
  • PET polyethylene terephthalate
  • Unevenness due to the filler can be absorbed, and the occurrence of glue marks due to the separator or the like can be suppressed.
  • the stiffness (rigidity) of the separator is lowered, the peelability of the separator is improved.
  • the void ratio is preferably 40% or less, and more preferably 30% or less.
  • the hollow shape of the polyester base material is preferably spherical, elliptical, or thread-like, and preferably has a dispersed form.
  • the dispersion diameter is preferably from 0.01 to 100 ⁇ m, and more preferably from 0.05 to 30 ⁇ m.
  • the separator has strength, is excellent in cushioning properties, and is excellent in peelability of the separator.
  • the shape of the cavity can be observed from the cross section of the substrate with a scanning electron microscope.
  • the release layer has adhesion to the polyester-based substrate and has releasability with respect to the pressure-sensitive adhesive layer, and can be formed from a release agent composition.
  • a release agent composition for example, long-chain alkyl type compounds, such as silicone compounds, such as a dimethylsiloxane and a diphenylsiloxane, a silicone resin, a fluororesin, an ashioresin, etc. can be used.
  • the release agent composition may contain other known additives such as antistatic agents, powders such as colorants, pigments, surfactants, plasticizers, and tackifiers. , Low molecular weight polymers, surface lubricants, leveling agents, antioxidants, corrosion inhibitors, light stabilizers, UV absorbers, polymerization inhibitors, silane coupling agents, inorganic or organic fillers, metal powders, particulates, etc. Can be added as appropriate according to the intended use.
  • the separator is formed on the polyester base material using the release agent composition.
  • the method for forming the release layer on the polyester-based substrate is not particularly limited.
  • the release agent composition solution is applied to the substrate, and the polymerization solvent is dried and removed to form the release layer. It is produced by forming on a base material. Thereafter, curing may be performed for the purpose of adjusting the component transfer of the release layer.
  • the release agent composition when the release agent composition is applied onto the substrate to produce a release layer, contains at least one polymerization solvent other than the polymerization solvent so that it can be uniformly applied onto the substrate. A new solvent may be added.
  • a known method used for manufacturing the release layer is used. Specific examples include roll coating, gravure coating, reverse coating, roll brushing, spray coating, air knife coating, extrusion coating using a die coater, and the like.
  • the thickness of the release layer is typically 1 to 200 nm, preferably 5 to 100 nm, more preferably 10 to 50 nm.
  • the thickness of the release layer is typically 1 to 200 nm, preferably 5 to 100 nm, more preferably 10 to 50 nm.
  • Examples of commercially available separators include Krisper K7211-50 ⁇ m, Krisper K7211-38 ⁇ m (above, manufactured by Toyobo), PET50 (K2411) PAT1, 8LK, PET50 (K2411) PAT1, 9K (above, manufactured by Lintec). .
  • the optical surface protective film with a separator of the present invention has a form in which the release layer of the separator is bonded to the surface of the pressure-sensitive adhesive layer of the optical surface protective film.
  • a known method is used for the bonding.
  • the optical surface protection film which peeled the said separator from the surface of the adhesive layer of the said optical surface protection film with a separator can be stuck on an optical member, and an optical member can be protected. Since the separator is excellent in cushioning properties, it is hard to generate dents and has good peelability, and the optical surface protective film is excellent in appearance quality (appearance), so that it is processed, transported and shipped. Since it can be used for surface protection applications such as time (surface protective film), it is useful for protecting the surface of the optical member (polarizing plate or the like).
  • the thickness of the separator is the total thickness of the polyester base material and the release layer, and was measured using R1-205 manufactured by Ozaki Mfg. Co., Ltd.
  • Tg glass transition temperature
  • Tgn glass transition temperature of the homopolymer of each monomer.
  • Formula: 1 / (Tg + 273) ⁇ [Wn / (Tgn + 273)] (Wherein Tg (° C.) is the glass transition temperature of the copolymer, Wn ( ⁇ ) is the weight fraction of each monomer, Tgn (° C.) is the glass transition temperature of the homopolymer of each monomer, and n is the type of each monomer.
  • the glass 5 (S9213, which is obtained by cutting the optical surface protective film 3 with a separator into a size of 50 mm in width and 100 mm in length and bonding a double-sided tape 4 (manufactured by Nitto Denko Corporation, No. 500).
  • the surface of the base film 22 constituting the optical surface protective film 3 with a separator was pressure-bonded onto Matsunami Glass Industrial Co., Ltd.) at a pressure of 0.25 MPa and a speed of 0.3 m / min.
  • single-sided adhesive tape 6 (No. 720, manufactured by Nitto Denko Corporation, width 50 mm) was cut to a length of 50 mm.
  • the pressure-sensitive adhesive surface of the single-sided pressure-sensitive adhesive tape 6 was pressure-bonded with a hand roller onto the separator 1 having a width of 50 mm of the optical surface protective film 3 with a separator so that the end portion protruded by 1 mm. This was left under conditions of 23 ° C. and 50% RH for 10 seconds. Thereafter, the maximum stress applied at the beginning of peeling when the single-sided adhesive tape 6 was peeled off at a speed of 0.3 m / min in the 180 ° direction by an autograph was used as a peeling force (N / 50 mm).
  • the trigger peeling force (pickup force) is 0.7 N / 50 mm or less, preferably 0.68 N / 50 mm or less, and more preferably 0.65 N / 50 mm or less.
  • the trigger peel force exceeds 0.7 N / 50 mm, when a thick separator is used, it takes time to peel the separator from the surface of the pressure-sensitive adhesive layer of the optical surface protective film. It is inferior in property and is not preferable.
  • the trigger peel force is too low, the surface of the pressure-sensitive adhesive layer of the optical surface protective film may not be sufficiently protected, so that it is preferably 0.2 N / 50 mm or more.
  • the (meth) acrylic polymer (A) solution (35% by weight) is diluted with ethyl acetate to 29% by weight, and 500 parts by weight (100 parts by weight of solid content) of this solution is used as a crosslinking agent with a trifunctional isocyanate compound.
  • Isocyanurate of certain hexamethylene diisocyanate (Coronate HX: C / HX, manufactured by Nippon Polyurethane Co., Ltd.) 4 parts by weight (solid content 4 parts by weight), dibutyltin dilaurate as a crosslinking catalyst (“Sn” in Table 2, 1% by weight) Ethyl acetate solution) 1.5 parts by weight (solid content 0.015 parts by weight) was added, and the mixture was stirred at about 25 ° C. for about 1 minute to prepare an acrylic pressure-sensitive adhesive (1) solution.
  • the (meth) acrylic polymer (B) solution (30% by weight) is diluted with ethyl acetate to 29% by weight, and 500 parts by weight (100 parts by weight of solid content) of this solution is used as a crosslinking agent.
  • the (meth) acrylic polymer (A) solution (35% by weight) is diluted to 29% by weight with ethyl acetate, and an isocyanate crosslinking agent (as a crosslinking agent) is added to 500 parts by weight (100 parts by weight of solid content) of this solution.
  • Isocyanurate of hexamethylene diisocyanate (trade name “Coronate HX”: C / HX, manufactured by Nippon Polyurethane Co., Ltd.) 5 parts by weight (solid content 5 parts by weight), dibutyltin dilaurate (1% by weight ethyl acetate solution) as a crosslinking catalyst 3 Parts by weight (solid content: 0.03 parts by weight), polyoxyalkylene chain-containing compound (Aqualon HS-10, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) not containing the organopolysiloxane additive, 0.3 parts by weight (solid content 0 .3 parts) was added and mixed and stirred to prepare an acrylic pressure-sensitive adhesive (3) solution.
  • Antistatic agent by diluting 10 parts by weight of antistatic agent (manufactured by Solvex, Microsolver RMd-142, mainly composed of tin oxide and polyester resin) with a mixed solvent of 30 parts by weight of water and 70 parts by weight of methanol An agent solution was prepared. The obtained antistatic agent solution was applied on a polyethylene terephthalate (PET) film (thickness: 38 ⁇ m) as a base film using a Mayer bar, and the solvent was removed by drying at 130 ° C. for 1 minute. An antistatic layer (thickness: 0.2 ⁇ m) was formed to produce an antistatic treatment film.
  • PET polyethylene terephthalate
  • Tables 1 to 3 show the results of the above-described blending contents, various measurements, and evaluations on the optical surface protective films with separators according to Examples and Comparative Examples.
  • surface shows an active ingredient.
  • the separator-provided optical surface protective film with a separator is used at the time of production or transportation of an optical member used as a component of a liquid crystal display panel, a plasma display panel (PDP), an organic electroluminescence (EL) display, or the like. It is suitable as a surface protective film for protecting the optical member. In particular, it is useful as an optical surface protective film applied to optical members such as polarizing plates (polarizing films) for liquid crystal display panels, wave plates, retardation plates, optical compensation films, brightness enhancement films, light diffusion sheets, and reflective sheets. It is.
  • polarizing plates polarizing films
  • Optical surface protective film 3 Optical surface protective film 4 with separator: Double-sided adhesive tape 5: Glass 6: Single-sided adhesive tape 11: Polyester base material 12: Release layer 21: Adhesive layer 22: Base film

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  • Physics & Mathematics (AREA)
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  • Adhesive Tapes (AREA)
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10278203A (ja) * 1997-04-01 1998-10-20 Diafoil Co Ltd 離型フィルム
JPH10286922A (ja) * 1997-04-15 1998-10-27 Diafoil Co Ltd 離型フィルム
JP2001347609A (ja) * 2000-06-06 2001-12-18 Toyobo Co Ltd 空洞含有ポリエステル系離型フィルム
JP2002173650A (ja) * 2000-12-04 2002-06-21 Hitachi Chem Co Ltd 光学シート保護用粘着フィルム
JP2005131957A (ja) * 2003-10-30 2005-05-26 Fujimori Kogyo Co Ltd 表面保護フィルムおよびこれが貼着された光学部品
JP2006346899A (ja) * 2005-06-13 2006-12-28 Sumitomo Electric Ind Ltd はく離フィルムとそれを用いる接着フィルム
JP2007277484A (ja) * 2006-04-11 2007-10-25 Nitto Denko Corp 粘着剤組成物、粘着シートおよび表面保護フィルム
WO2016043275A1 (ja) * 2014-09-19 2016-03-24 リンテック株式会社 表面保護フィルム

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008266473A (ja) * 2007-04-20 2008-11-06 Nitto Denko Corp 透明粘着シート及びフラットパネルディスプレイ
JP2011252109A (ja) * 2010-06-03 2011-12-15 Nitto Denko Corp シート製品
JP5683369B2 (ja) 2011-04-22 2015-03-11 藤森工業株式会社 粘着剤組成物及び表面保護フィルム

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10278203A (ja) * 1997-04-01 1998-10-20 Diafoil Co Ltd 離型フィルム
JPH10286922A (ja) * 1997-04-15 1998-10-27 Diafoil Co Ltd 離型フィルム
JP2001347609A (ja) * 2000-06-06 2001-12-18 Toyobo Co Ltd 空洞含有ポリエステル系離型フィルム
JP2002173650A (ja) * 2000-12-04 2002-06-21 Hitachi Chem Co Ltd 光学シート保護用粘着フィルム
JP2005131957A (ja) * 2003-10-30 2005-05-26 Fujimori Kogyo Co Ltd 表面保護フィルムおよびこれが貼着された光学部品
JP2006346899A (ja) * 2005-06-13 2006-12-28 Sumitomo Electric Ind Ltd はく離フィルムとそれを用いる接着フィルム
JP2007277484A (ja) * 2006-04-11 2007-10-25 Nitto Denko Corp 粘着剤組成物、粘着シートおよび表面保護フィルム
WO2016043275A1 (ja) * 2014-09-19 2016-03-24 リンテック株式会社 表面保護フィルム

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