KR20220103958A - reinforcing film - Google Patents

Abstract

Provided is a reinforcing film capable of being affixed to an optical member or an electronic member, wherein a change in reflectance is suppressed and inspection property is not lowered when an optical member or an electronic member is inspected over the reinforcing film. Moreover, the optical member with a reinforcing film provided with such a reinforcing film or an electronic member with a reinforcing film is provided. Also provided are a reinforcing film with a surface protection film in which the reinforcing film is provided with a surface protection film, and a method of using such a reinforcing film with a surface protection film. A reinforcing film according to an embodiment of the present invention is a reinforcing film comprising a base layer A1 and an adhesive layer A2, and the light at 580 nm after the reinforcing film is stored for one week in an environment of 60°C and 90% RH The reflectance change rate is 2.0% or less.

Description

reinforcing film

The present invention relates to a reinforcing film.

In order to impart rigidity or impact resistance to optical members or electronic members represented by organic EL panels, LCD panels, touch panels, etc. There is (Patent Document 1).

In addition, in order to prevent the occurrence of scratches on the surface during processing, assembling, inspection, transportation, etc., there are cases in which the surface protection film is previously adhered to the exposed surface of the reinforcing film. Such a surface protection film peels from the film for reinforcement when the need for surface protection is no longer (patent document 2).

In such a film for reinforcement, it may affix on an optical member or an electronic member, and the test|inspection of an optical member and an electronic member may be made over the film for reinforcement.

However, when the reinforcing film is affixed to an optical member or an electronic member and stored for a long term in a harsh environment, the reflectance of the reinforcing film may change, and inspection property may fall.

As mentioned above, in the reinforcing film which is affixed to an optical member or an electronic member, and is made to inspect an optical member or an electronic member over the reinforcing film, it is affixed to the point to be improved, ie, an optical member or an electronic member, and it is affixed to a harsh environment for a long period of time When stored, it is important that the change in reflectance of the reinforcing film is suppressed.

Japanese Patent Publication No. 6366199 Japanese Patent Laid-Open No. 2016-17109

The subject of this invention is a reinforcement film which can be affixed to an optical member or an electronic member, When the test|inspection of an optical member or an electronic member is made over the reinforcing film, the change of reflectance is suppressed and the reinforcement which does not reduce testability. To provide a film for Moreover, it is providing the optical member with a reinforcing film or an electronic member with a reinforcing film provided with such a reinforcing film. Another object of the present invention is to provide a reinforcing film with a surface protection film in which the reinforcing film is provided with a surface protection film, and to provide a method of using such a reinforcing film with a surface protection film.

A reinforcing film according to an embodiment of the present invention,

As a reinforcing film comprising a base layer A1 and an adhesive layer A2,

The light reflectance change rate in 580 nm after storing this film for reinforcement in 60 degreeC and 90%RH environment for one week is 2.0 % or less.

In one embodiment, the haze change rate after storing the said film for reinforcement in 60 degreeC and 90 %RH environment for 1 week is 10.0 % or less.

In one Embodiment, the total light transmittance of the said base material layer A1 is 90 % or more.

In one embodiment, the reinforcing film according to the embodiment of the present invention affixes the pressure-sensitive adhesive layer A2 to the PET film and leaves it at 23° C. for 30 minutes, at a peeling angle of 180 degrees and a peeling rate of 300 mm/min. The adhesive strength of the PET film is 0.30 N/25 mm or more.

In one embodiment, the film for reinforcement which concerns on embodiment of this invention is affixed on the to-be-adhered body which is an optical member or an electronic member.

The optical member with a film for reinforcement or the electronic member with a film for reinforcement which concerns on embodiment of this invention is equipped with the film for reinforcement which concerns on embodiment of this invention.

The film for reinforcement with a surface protection film which concerns on embodiment of this invention is equipped with a surface protection film on the said base material layer A1 side of the film for reinforcement which concerns on embodiment of this invention.

In one embodiment, after the film for reinforcement with a surface protection film which concerns on embodiment of this invention stores this film for reinforcement with a surface protection film in 60 degreeC and 90%RH environment for one week, the said surface protection film The light reflectance change rate in 580 nm of the said reinforcement film after peeling is 5.0 % or less.

In the method of using the reinforcing film with a surface protection film of the present invention, the pressure-sensitive adhesive layer A2 included in the reinforcing film with a surface protection film according to an embodiment of the present invention is exposed, the pressure-sensitive adhesive layer A2 is adhered to the adherend, and then , Peel the surface protection film.

ADVANTAGE OF THE INVENTION According to this invention, it is a reinforcing film which can be affixed to an optical member or an electronic member, When the test|inspection of an optical member or an electronic member is made over the reinforcing film, the change of a reflectance is suppressed and the test property is for reinforcement which does not deteriorate. A film may be provided. Moreover, the optical member with a reinforcing film provided with such a reinforcing film or an electronic member with a reinforcing film can be provided. In addition, it is possible to provide a reinforcing film with a surface protection film in which the reinforcing film is provided with a surface protection film, and a method of using such a reinforcing film with a surface protection film.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic sectional drawing of one Embodiment of the film for reinforcement in embodiment of this invention.
It is a schematic sectional drawing of another one Embodiment of the film for reinforcement in embodiment of this invention.
It is a schematic sectional drawing of one Embodiment of a surface protection film.
4 is a schematic cross-sectional view of another embodiment of a surface protection film.
It is a schematic sectional drawing of one Embodiment of the film for reinforcement with a surface protection film of this invention.

In the present specification, when the expression "mass" is used, it may be read differently as "weight", which is conventionally generally used as a unit of weight. It may be read differently as "mass", which is commonly used as an SI-based unit.

In this specification, when the expression "(meth)acryl" is used, it means "acryl and/or methacryl", and when the expression "(meth)acrylate" is used, "acrylate and/or methacrylate" In the case of the expression "(meth) allyl", it means "allyl and/or methallyl", and when the expression "(meth) acrolein" is present, "acrolein and/or methacrolein" it means.

«1. Reinforcement film≫

The film for reinforcement of this invention contains base material layer A1 and adhesive layer A2. As long as the film for reinforcement of this invention has base material layer A1 and adhesive layer A2, it may have arbitrary appropriate other layers in the range which does not impair the effect of this invention.

The release sheet mentioned later may be provided on the surface of adhesive layer A2 for protection.

In order to provide various functions on the surface of the base material layer A1, the functional layer A3 mentioned later may be provided.

As the thickness of the reinforcing film, any appropriate thickness can be adopted according to the purpose within a range that does not impair the effects of the present invention. As such thickness, Preferably they are 5 micrometers - 800 micrometers, More preferably, they are 10 micrometers - 650 micrometers, More preferably, they are 20 micrometers - 550 micrometers, Especially preferably, they are 25 micrometers - 450 micrometers.

As shown in FIG. 1, one Embodiment of the film for reinforcement consists of base material layer A1(10) and adhesive layer A2(20).

The reinforcing film of the present invention has a light reflectance change rate at 580 nm of 2.0% or less, preferably 1.9% or less, more preferably after the reinforcing film is stored for one week in an environment of 60°C and 90% RH. is 1.8% or less, more preferably 1.7% or less, and particularly preferably 1.6% or less. If the light reflectance change rate is within the above range, it is possible to provide a reinforcing film in which inspection properties do not deteriorate when an optical member or an electronic member is inspected over the reinforcing film.

The reinforcing film of the present invention has a haze change rate of preferably 10.0% or less, more preferably 7.0% or less, and still more preferably after storing the reinforcing film for one week in an environment of 60°C and 90% RH. Preferably it is 6.0% or less, even more preferably it is 5.0% or less, Especially preferably, it is 4.0% or less, Most preferably, it is 3.5% or less. When the said haze change rate exists in the said range, when the test|inspection of an optical member or an electronic member is made over the reinforcement film, the reinforcing film in which testability does not fall more can be provided.

<1-1. Base layer A1>

As base material layer A1, the base material formed from arbitrary suitable materials according to the objective can be employ|adopted in the range which does not impair the effect of this invention. Examples of such a material include a resin sheet, a nonwoven fabric, paper, metal foil, a woven fabric, a rubber sheet, a foam sheet, and a laminate of these (especially a laminate including a resin sheet).

Examples of the resin constituting the resin sheet include acrylic resins such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), and polymethyl methacrylate (PMMA), polycarbo Nate, triacetyl cellulose (TAC), polysulfone, polyarylate, polyethylene (PE), polypropylene (PP), ethylene-propylene copolymer, ethylene-vinyl acetate copolymer (EVA), polyamide (nylon), former Aromatic polyamide (aramid), polyimide (PI), polyvinyl chloride (PVC), polyvinyl acetate, polyphenylene sulfide (PPS), fluorine resin, polyether ether ketone (PEEK), cyclic olefin polymer, etc. are mentioned. can

Examples of the nonwoven fabric include nonwoven fabrics made of natural fibers having heat resistance, such as nonwoven fabrics made of manila hemp; synthetic resin nonwoven fabrics, such as polypropylene resin nonwoven fabric, polyethylene resin nonwoven fabric, and ester resin nonwoven fabric; and the like.

One layer may be sufficient as base material layer A1, and two or more layers may be sufficient as it.

As thickness of base material layer A1, it is the range which does not impair the effect of this invention, and arbitrary appropriate thickness is employable according to the objective. As such thickness, Preferably they are 4 micrometers - 500 micrometers, More preferably, they are 10 micrometers - 400 micrometers, More preferably, they are 15 micrometers - 350 micrometers, Especially preferably, they are 20 micrometers - 300 micrometers.

The total light transmittance of base material layer A1 becomes like this. Preferably it is 90 % or more, More preferably, it is 91 % or more, More preferably, it is 92 % or more, Especially preferably, it is 93 % or more. When the total light transmittance of the base material layer A1 is within the above range, when the optical member or the electronic member is inspected over the reinforcement film, the reinforcing film in which the inspection property does not decrease more can be provided.

The base material layer A1 may contain the antistatic agent. As the base layer A1 containing the antistatic agent, for example, a resin sheet in which the antistatic agent has been beaten and put therein can be used. Such a resin sheet may be formed of a composition for forming the base layer A1 including a resin and an antistatic agent.

The base layer A1 itself may act as an antistatic agent. For example, when metal foil is employ|adopted as a material of base material layer A1, base material layer A1 itself can act as an antistatic agent.

The base material layer A1 may be surface-treated. Examples of the surface treatment include corona treatment, plasma treatment, chromic acid treatment, ozone exposure, flame exposure, high-pressure electric shock exposure, ionizing radiation treatment, and coating treatment with a primer.

As an organic coating material, the material described in plastic hard-coat material II (CMC publication, (2004)) is mentioned, for example. As such an organic coating material, Preferably a urethane-type polymer is mentioned, More preferably, polyacrylic urethane, polyester urethane, or these precursors are mentioned. It is because the coating and application|coating to base material layer A1 are simple, and it is because it can select industrially many types of thing, and can obtain it cheaply. Examples of the urethane-based polymer include a polymer composed of a reaction mixture of an isocyanato monomer and an alcoholic hydroxyl group-containing monomer (for example, a hydroxyl group-containing acrylic compound or a hydroxyl group-containing ester compound). The organic coating material may contain a chain extender such as polyamine, an antioxidant, an oxidation stabilizer, and the like as optional additives.

The base material layer A1 may contain arbitrary appropriate other additives according to the objective in the range which does not impair the effect of this invention.

<1-2. Adhesive layer A2>

As thickness of adhesive layer A2, it is the range which does not impair the effect of this invention, and arbitrary appropriate thickness is employable according to the objective. As such thickness, Preferably they are 1 micrometer - 300 micrometers, More preferably, they are 2 micrometers - 250 micrometers, More preferably, they are 4 micrometers - 200 micrometers, Especially preferably, they are 5 micrometers - 150 micrometers.

One layer may be sufficient as adhesive layer A2, and two or more layers may be sufficient as it.

The adhesive layer A2 may contain the electrically-conductive component. The number of electrically-conductive components may be one, and 2 or more types may be sufficient as them.

After affixing the adhesive layer A2 to the PET film and leaving it to stand at 23 ° C. for 30 minutes, the peeling angle 180 degrees and the peeling rate 300 mm/min, the adhesive force of the PET film to the PET film is preferably 0.30 N/25 mm or more, More preferably, they are 1N/25mm - 40N/25mm, More preferably, they are 5N/25mm - 35N/25mm, Especially preferably, they are 10N/25mm - 30N/25mm.

After affixing the adhesive layer A2 to the PET film and leaving it to stand at 60°C for 60 minutes, the adhesive strength of the PET film to the PET film at a peeling angle of 180 degrees and a peeling rate of 300 mm/min is preferably 10 N/25 mm or more, more preferably They are 10N/25mm - 40N/25mm, More preferably, they are 15N/25mm - 35N/25mm, Especially preferably, they are 20N/25mm - 30N/25mm.

The pressure-sensitive adhesive layer A2 is formed from the pressure-sensitive adhesive composition a2. The pressure-sensitive adhesive layer A2 can be formed by any suitable method as long as it is a method capable of forming the pressure-sensitive adhesive composition a2 in a layered manner. For example, the adhesive layer A2 apply|coats the adhesive composition a2 on arbitrary suitable base materials, performs heating etc., active energy ray (ultraviolet rays, etc.) irradiation, drying etc. as needed, hardening as needed, the said base material The method of forming an adhesive layer in the phase is mentioned. As such a coating method, for example, a method such as a gravure roll coater, a reverse roll coater, a kiss roll coater, a dip roll coater, a bar coater, a knife coater, an air knife coater, a spray coater, a comma coater, a direct coater, and a roll brush coater is used. can be heard

The pressure-sensitive adhesive composition a2 preferably contains a polymer component from the point where the effect of the present invention can be expressed more.

As a polymer component, Preferably it is at least 1 sort(s) chosen from an acrylic polymer, a urethane type polymer, and a silicone type polymer. Hereinafter, an acrylic polymer is demonstrated as a representative example.

An acrylic polymer can be called a so-called base polymer in the field of an acrylic adhesive. The number of acrylic polymers may be one, and 2 or more types may be sufficient as them.

The content rate of the acrylic polymer in adhesive composition a2 becomes like this in conversion of solid content, Preferably it is 60 weight% - 99.999 weight%, More preferably, it is 65 weight% - 99.99 weight%, More preferably, it is 70 weight% - 99.9 weight% %, particularly preferably 75% to 99.9% by weight, and most preferably 80% to 99.9% by weight.

As the acrylic polymer, any appropriate acrylic polymer can be employed as long as the effects of the present invention are not impaired.

The weight average molecular weight of the acrylic polymer is preferably 300,000 to 2.5 million, more preferably 350,000 to 2 million, still more preferably 400,000 to 180, from the point that the effect of the present invention can be expressed more. 10,000, and particularly preferably 500,000 to 1.5 million.

As an acrylic polymer, from the point which can express the effect of this invention more, Preferably (a component) C4-C12 (meth)acrylic acid alkylester of the alkyl group of the alkylester part, (b component) has an OH group It is an acrylic polymer formed by polymerization from the composition (A) containing at least 1 sort(s) selected from the group which consists of (meth)acrylic acid ester and (meth)acrylic acid.

(a component) and (b component) may each independently be 1 type, and 2 or more types may be sufficient as them.

As the (meth)acrylic acid alkylester (component a) having 4 to 12 carbon atoms in the alkyl group of the alkyl ester moiety, for example, (meth)acrylate n-butyl, (meth)acrylate isobutyl, (meth)acrylic acid s-butyl, (meth) acrylate t-butyl, (meth) acrylate pentyl, (meth) acrylate hexyl, (meth) acrylate heptyl, (meth) acrylate octyl, (meth) acrylate 2-ethylhexyl, (meth) acrylate isooctyl, (meth) acrylate ) Nonyl acrylate, (meth) acrylate isononyl, (meth) acrylate decyl, (meth) acrylate isodecyl, (meth) acrylate undecyl, (meth) acrylate dodecyl, etc. are mentioned. Among these, from the point which can express the effect of this invention more, Preferably they are (meth)acrylic-acid n-butyl and (meth)acrylic-acid 2-ethylhexyl, More preferably, they are n-butyl acrylate and 2-ethyl acrylate. It is hexyl.

As at least one (component b) selected from the group consisting of (meth)acrylic acid ester and (meth)acrylic acid having an OH group, for example, (meth)acrylic acid hydroxyethyl, (meth)acrylic acid hydroxypropyl, (meth) (meth)acrylic acid ester, (meth)acrylic acid, etc. which have OH groups, such as hydroxybutyl acrylate, are mentioned. Among these, since the effect of this invention can be expressed more, Preferably they are (meth)acrylic-acid hydroxyethyl and (meth)acrylic acid, More preferably, they are hydroxyethyl acrylate and acrylic acid.

The composition (A) may contain copolymerizable monomers other than the component (a) and the component (b). The number of copolymerizable monomers may be one, and 2 or more types may be sufficient as them. As such a copolymerizable monomer, For example, C1-C3 (meth)acrylic-acid alkylester of the alkyl group of an alkylester part, such as (meth)acrylate, ethyl (meth)acrylate, and propyl (meth)acrylate; A carboxyl group-containing monomer (provided that (meth) excluding acrylic acid); (meth)acrylamide, N,N-dimethyl (meth)acrylamide, N-methylol (meth)acrylamide, N-methoxymethyl (meth)acrylamide, N-butoxymethyl (meth)acrylamide, N -amide group containing monomers, such as hydroxyethyl (meth)acrylamide; amino group-containing monomers such as aminoethyl (meth)acrylate, dimethylaminoethyl (meth)acrylate, and t-butylaminoethyl (meth)acrylate; Epoxy group-containing monomers, such as (meth)acrylic-acid glycidyl and (meth)acrylic-acid methyl glycidyl; cyano group-containing monomers such as acrylonitrile and methacrylonitrile; N-vinyl-2-pyrrolidone, (meth)acryloylmorpholine, N-vinylpiperidone, N-vinylpiperazine, N-vinylpyrrole, N-vinylimidazole, vinylpyridine, vinylpyrimidine, Heterocyclic-containing vinyl-type monomers, such as vinyloxazole; Sulfonic acid group-containing monomers, such as sodium vinylsulfonate; phosphoric acid group-containing monomers such as 2-hydroxyethyl acryloyl phosphate; imide group-containing monomers such as cyclohexyl maleimide and isopropyl maleimide; isocyanate group-containing monomers such as 2-methacryloyloxyethyl isocyanate; (meth)acrylic acid ester having an alicyclic hydrocarbon group such as cyclopentyl (meth)acrylate, cyclohexyl (meth)acrylate, and isobornyl (meth)acrylate; (meth)acrylic acid ester which has aromatic hydrocarbon groups, such as phenyl (meth)acrylate, phenoxyethyl (meth)acrylate, and benzyl (meth)acrylate; vinyl esters such as vinyl acetate and vinyl propionate; aromatic vinyl compounds such as styrene and vinyltoluene; olefins and dienes such as ethylene, butadiene, isoprene, and isobutylene; vinyl ethers such as vinyl alkyl ether; vinyl chloride; and the like.

As a copolymerizable monomer, a polyfunctional monomer can also be employ|adopted. A polyfunctional monomer means the monomer which has two or more ethylenically unsaturated groups in 1 molecule. As an ethylenically unsaturated group, any suitable ethylenically unsaturated group can be employ|adopted in the range which does not impair the effect of this invention. As such an ethylenically unsaturated group, radical polymerizable functional groups, such as a vinyl group, a propenyl group, an isopropenyl group, a vinyl ether group (vinyloxy group), and an allyl ether group (allyloxy group), are mentioned, for example. Examples of the polyfunctional monomer include hexanediol di(meth)acrylate, butanediol di(meth)acrylate, (poly)ethylene glycol di(meth)acrylate, (poly)propylene glycol di(meth)acrylate, neo Pentyl glycol di (meth) acrylate, pentaerythritol di (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, trimethylol propane tri (meth) acrylate, Tetramethylolmethane tri(meth)acrylate, allyl (meth)acrylate, vinyl (meth)acrylate, divinylbenzene, epoxy acrylate, polyester acrylate, urethane acrylate, etc. are mentioned. The number of such polyfunctional monomers may be one, and 2 or more types may be sufficient as them.

As a copolymerizable monomer, (meth)acrylic-acid alkoxyalkyl ester is also employable. As the (meth)acrylic acid alkoxyalkyl ester, for example, (meth)acrylic acid 2-methoxyethyl, (meth)acrylic acid 2-ethoxyethyl, (meth)acrylic acid methoxytriethylene glycol, (meth)acrylic acid 3-methoxy propyl, (meth)acrylic acid 3-ethoxypropyl, (meth)acrylic acid 4-methoxybutyl, (meth)acrylic acid 4-ethoxybutyl, etc. are mentioned. The number of (meth)acrylic-acid alkoxyalkyl ester may be one, and 2 or more types may be sufficient as it.

The content of the (meth)acrylic acid alkyl ester (component a) having 4 to 12 carbon atoms in the alkyl group of the alkyl ester moiety is the total amount (100 weight) of the monomer components constituting the acrylic polymer from the viewpoint that the effect of the present invention can be expressed more. %), preferably 30 wt% or more, more preferably 35 wt% to 99 wt%, still more preferably 40 wt% to 98 wt%, particularly preferably 50 wt% to 96 wt% %to be.

The content of at least one (component b) selected from the group consisting of (meth)acrylic acid ester having an OH group and (meth)acrylic acid is a monomer component constituting the acrylic polymer from the viewpoint that the effect of the present invention can be more expressed. With respect to the whole amount (100 weight%), Preferably it is 1 weight% or more, More preferably, it is 1 weight% - 30 weight%, More preferably, it is 2 weight% - 20 weight%, Especially preferably, it is 3 weight%. % to 15% by weight.

The composition (A) may contain any appropriate other component in the range which does not impair the effect of this invention. As such other components, a polymerization initiator, a chain transfer agent, a solvent, etc. are mentioned, for example. Any suitable content can be employ|adopted for content of these other components in the range which does not impair the effect of this invention.

As a polymerization initiator, a thermal polymerization initiator, a photoinitiator (photoinitiator), etc. can be employ|adopted according to the kind of polymerization reaction. The number of polymerization initiators may be one, and 2 or more types may be sufficient as them.

The thermal polymerization initiator can be preferably employed when obtaining the acrylic polymer by solution polymerization. Examples of such thermal polymerization initiators include azo polymerization initiators, peroxide polymerization initiators (eg, dibenzoyl peroxide, tert-butyl permaleate, etc.), redox polymerization initiators, and the like. Among these thermal polymerization initiators, the azo-type initiator disclosed in Unexamined-Japanese-Patent No. 2002-69411 is especially preferable. Such an azo polymerization initiator is preferable because the decomposition product of the polymerization initiator does not easily remain in the acrylic polymer as a portion that causes generation of heat-generating gas (outgas). Examples of the azo polymerization initiator include 2,2'-azobisisobutyronitrile (hereinafter, may be referred to as AIBN), 2,2'-azobis-2-methylbutyronitrile (hereinafter referred to as AMBN in some cases) ), 2,2'-azobis(2-methylpropionic acid)dimethyl, and 4,4'-azobis-4-cyanovalerianic acid.

A photoinitiator is preferably employable when obtaining an acrylic polymer by active energy ray polymerization. Examples of the photopolymerization initiator include a benzoin ether-based photopolymerization initiator, an acetophenone-based photopolymerization initiator, an α-ketol-based photopolymerization initiator, an aromatic sulfonyl chloride-based photopolymerization initiator, a photoactive oxime-based photopolymerization initiator, a benzoin-based photopolymerization initiator, and a benzyl-based photopolymerization initiator. An initiator, a benzophenone type photoinitiator, a ketal type photoinitiator, a thioxanthone type photoinitiator, etc. are mentioned.

As a benzoin ether type photoinitiator, For example, benzoin methyl ether, benzoin ethyl ether, benzoin propyl ether, benzoin isopropyl ether, benzoin isobutyl ether, 2,2-dimethoxy-1,2-di A phenylethan-1-one, anisolemethyl ether, etc. are mentioned. Examples of the acetophenone-based photopolymerization initiator include 2,2-diethoxyacetophenone, 2,2-dimethoxy-2-phenylacetophenone, 1-hydroxycyclohexylphenyl ketone, 4-phenoxydichloroacetophenone, 4 -(t-butyl)dichloroacetophenone etc. are mentioned. Examples of the α-ketol-based photopolymerization initiator include 2-methyl-2-hydroxypropiophenone and 1-[4-(2-hydroxyethyl)phenyl]-2-methylpropan-1-one. have. As an aromatic sulfonyl chloride type|system|group photoinitiator, 2-naphthalenesulfonyl chloride etc. are mentioned, for example. Examples of the photoactive oxime-based photopolymerization initiator include 1-phenyl-1,1-propanedione-2-(o-ethoxycarbonyl)-oxime. As a benzoin type photoinitiator, benzoin etc. are mentioned, for example. As a benzyl type photoinitiator, benzyl etc. are mentioned, for example. Examples of the benzophenone-based photopolymerization initiator include benzophenone, benzoylbenzoic acid, 3,3'-dimethyl-4-methoxybenzophenone, polyvinylbenzophenone, and α-hydroxycyclohexylphenylketone. As a ketal-type photoinitiator, benzyl dimethyl ketal etc. are mentioned, for example. As a thioxanthone type photoinitiator, thioxanthone, 2-chlorothioxanthone, 2-methylthioxanthone, 2, 4- dimethyl thioxanthone, isopropyl thioxanthone, 2, 4- diiso is, for example. A propyl thioxanthone, dodecyl thioxanthone, etc. are mentioned.

The adhesive composition a2 may contain the crosslinking agent. By using a crosslinking agent, the cohesive force of an acrylic adhesive can be improved and the effect of this invention can be expressed more. The number of crosslinking agents may be one, and 2 or more types may be sufficient as them.

Examples of the crosslinking agent include polyfunctional isocyanate crosslinking agents, epoxy crosslinking agents, melamine crosslinking agents, peroxide crosslinking agents, urea crosslinking agents, metal alkoxide crosslinking agents, metal chelate crosslinking agents, metal salt crosslinking agents, carbodiimide crosslinking agents, oxazoline crosslinking agents. , an aziridine-based crosslinking agent, an amine-based crosslinking agent, and the like. Among these, it is at least 1 type (component c) preferably selected from the group which consists of a polyfunctional isocyanate type crosslinking agent and an epoxy type crosslinking agent from the point which can express the effect of this invention more.

Examples of the polyfunctional isocyanate-based crosslinking agent include lower aliphatic polyisocyanates such as 1,2-ethylene diisocyanate, 1,4-butylene diisocyanate, and 1,6-hexamethylene diisocyanate; alicyclic polyisocyanates such as cyclopentylene diisocyanate, cyclohexylene diisocyanate, isophorone diisocyanate, hydrogenated tolylene diisocyanate, and hydrogenated xylene diisocyanate; and aromatic polyisocyanates such as 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, 4,4'-diphenylmethane diisocyanate and xylylene diisocyanate. As a polyfunctional isocyanate type crosslinking agent, for example, trimethylolpropane/tolylene diisocyanate adduct (Nippon Polyurethane Kogyo Co., Ltd. make, brand name "Coronate L"), trimethylolpropane/hexamethylene diisocyanate adduct (Nippon Polyester) Urethane Kogyo Co., Ltd. make, trade name "Coronate HL"), trade name "Coronate HX" (Nippon Polyurethane Kogyo Co., Ltd.), trimethylolpropane/xylylene diisocyanate adduct (Mitsui Chemical Co., Ltd. make, Commercial items, such as a brand name "Takenate 110N"), are also mentioned.

As the epoxy crosslinking agent (polyfunctional epoxy compound), for example, N,N,N',N'-tetraglycidyl-m-xylenediamine, diglycidylaniline, 1,3-bis(N,N-) Diglycidylaminomethyl)cyclohexane, 1,6-hexanediol diglycidyl ether, neopentyl glycol diglycidyl ether, ethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, polyethylene glycol di Glycidyl ether, polypropylene glycol diglycidyl ether, sorbitol polyglycidyl ether, glycerol polyglycidyl ether, pentaerythritol polyglycidyl ether, polyglycerol polyglycidyl ether, sorbitan polyglycidyl ether Dil ether, trimethylolpropane polyglycidyl ether, adipic acid diglycidyl ester, o-phthalic acid diglycidyl ester, triglycidyl-tris(2-hydroxyethyl) isocyanurate, resorcindiglycyl In addition to cidyl ether and bisphenol-S-diglycidyl ether, an epoxy resin having two or more epoxy groups in the molecule may be mentioned. As an epoxy-type crosslinking agent, commercial items, such as a brand name "Tetrad C" (made by Mitsubishi Gas Chemical Co., Ltd.), are also mentioned.

Any suitable content can be employ|adopted for content of the crosslinking agent in adhesive composition a2 in the range which does not impair the effect of this invention. As such content, for example, from the point which can express the effect of this invention more, with respect to solid content (100 weight part) of an acrylic polymer, Preferably it is 0.005 weight part - 20 weight part, More preferably, it is 0.05 weight part. It is a part - 18 weight part, More preferably, it is 0.01 weight part - 15 weight part, Especially preferably, it is 0.1 weight part - 10 weight part.

The pressure-sensitive adhesive composition a2 may contain any appropriate other components within a range that does not impair the effects of the present invention. Examples of such other components include polymer components other than acrylic polymers, crosslinking accelerators, crosslinking catalysts, silane coupling agents, tackifying resins (rosin derivatives, polyterpene resins, petroleum resins, oil-soluble phenols, etc.), antioxidants, inorganic fillers, Organic fillers, metal powders, colorants (pigments, dyes, etc.), thin materials, ultraviolet absorbers, antioxidants, light stabilizers, chain transfer agents, plasticizers, softeners, surfactants, antistatic agents, conductive agents, stabilizers, surface lubricants, leveling agents, A corrosion inhibitor, a heat-resistant stabilizer, a polymerization inhibitor, a lubricant, a solvent, a catalyst, etc. are mentioned.

It is preferable that the adhesive composition a2 does not contain the oligomer (X) obtained from the monomer composition which contains the acrylic monomer which has a cyclic structure of 3 or more rings as a main component. In this case, the content ratio of the acrylic monomer having a tricyclic or more cyclic structure to 100 parts by weight of the total monomer components contained in the monomer composition used to obtain the oligomer (X) is preferably 50 parts by weight or more, and more Preferably it is 60 weight part - 99 weight part, More preferably, it is 70 weight part - 98 weight part, Especially preferably, it is 80 weight part - 96 weight part. When the pressure-sensitive adhesive composition a2 does not contain an oligomer (X) obtained from a monomer composition comprising an acrylic monomer having a tricyclic or more cyclic structure as a main component, an optical member or an electronic member is inspected through the reinforcing film, inspection property It is possible to provide a reinforcing film that does not lower than this.

Examples of the acrylic monomer having a cyclic structure of three or more rings include dicyclopentanyl (meth)acrylate, 1-adamantyl (meth)acrylate, dicyclopentanyl methacrylate, dicyclopentanyloxyethyl methacrylate, Dicyclopentanyloxyethyl acrylate, tricyclopentanyl methacrylate, tricyclopentanyl acrylate, 1-adamantyl methacrylate, 2-methyl-2-adamantyl methacrylate, 2-methyl-2-a Damantyl acrylate, 2-ethyl-2-adamantyl methacrylate, 2-ethyl-2-adamantyl acrylate, etc. are mentioned.

The number of acrylic monomers having a cyclic structure of three or more rings may be one or two or more.

The monomer composition used in order to obtain the oligomer (X) may contain other monomers other than the acryl-type monomer which has a cyclic structure of 3 or more rings. The number of such other monomers may be one, and 2 or more types may be sufficient as them.

Examples of the other monomers include methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, isopropyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, (meth) Acrylic acid s-butyl, (meth)acrylic acid t-butyl, (meth)acrylic acid pentyl, (meth)acrylic acid hexyl, (meth)acrylic acid heptyl, (meth)acrylate octyl, (meth)acrylic acid 2-ethylhexyl, (meth)acrylic acid (meth)acrylic acid alkyl esters, such as isooctyl, (meth)acrylic-acid nonyl, (meth)acrylic-acid isononyl, (meth)acrylic-acid decyl, and (meth)acrylic-acid isodecyl; Epoxy group-containing acrylic monomers, such as (meth)acrylic-acid glycidyl and (meth)acrylic-acid methylglycidyl; vinyl ester-based monomers such as vinyl acetate and vinyl propionate; hydroxyl group-containing monomers such as hydroxyethyl (meth)acrylate, hydroxypropyl (meth)acrylate, and hydroxybutyl (meth)acrylate; (meth)acrylic acid alkoxyalkyl monomers such as methoxyethyl (meth)acrylate and ethoxyethyl (meth)acrylate; olefinic monomers such as ethylene, propylene, isoprene and butadiene; vinyl ether-based monomers such as vinyl ether; and the like.

As other monomers, furthermore, hexanediol di(meth)acrylate, (poly)ethylene glycol di(meth)acrylate, (poly)propylene glycol di(meth)acrylate, neopentyl glycol di(meth)acrylate, pentaeryth Ritol di(meth)acrylate, glycerin di(meth)acrylate, trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, dipentaerythritol hexa(meth)acrylate, epoxy acrylate Polyfunctional monomers, such as polyester acrylate, urethane acrylate, divinylbenzene, butyl di (meth) acrylate, and hexyl di (meth) acrylate, are also mentioned.

Examples of the other monomer include a nitrogen atom-containing monomer (for example, aminoalkyl (meth)acrylate such as aminoethyl (meth)acrylate, N,N-dimethylaminoethyl (meth)acrylate, and t-butylaminoethyl (meth)acrylate) (N-substituted) amide-based monomers such as (meth)acrylamide, N,N-dimethyl (meth)acrylamide, N-butyl (meth)acrylamide, and N-hydroxy (meth)acrylamide; cyanoacrylate-based monomers such as ronitrile and methacrylonitrile; isocyanate group-containing monomers such as 2-methacryloyloxyethyl isocyanate);

The pressure-sensitive adhesive composition a2 may contain an oligomer (Y) other than the oligomer (X). However, since the effect of this invention can be expressed more, the one with little content of an oligomer (Y) is preferable.

From the point where the effect of this invention can be expressed more, the content rate of the oligomer (Y) in the pressure-sensitive adhesive composition a2 is preferably 50 parts by weight or less with respect to 100 parts by weight of the acrylic polymer contained in the pressure-sensitive adhesive composition a2, more Preferably it is 40 weight part or less, More preferably, it is 30 weight part or less, Especially preferably, it is 25 weight part or less.

The oligomer (Y) is preferably an acrylic monomer having a cyclic structure of two or less rings as a main component, and a carboxyl group-containing monomer from a monomer composition containing 1 to 10 parts by weight based on 100 parts by weight of the total amount of the monomer component. oligomer obtained.

Although either an aromatic ring or a non-aromatic ring may be sufficient as a cyclic structure of two or less rings, a non-aromatic ring is preferable. As an aromatic ring, an aromatic hydrocarbon ring (For example, the condensed carbocyclic ring in a benzene ring, naphthalene, etc.), various aromatic heterocyclic rings, etc. are mentioned, for example. Examples of the non-aromatic ring include non-aromatic alicyclic rings (cycloalkane rings such as cyclopentane ring, cyclohexane ring, cycloheptane ring and cyclooctane ring; cycloalkene ring such as cyclohexene ring), non-aromatic cross-linked ring (For example, bicyclic hydrocarbon ring in pinane, pinene, bornane, norbornane, norbornene, etc.) etc. are mentioned.

As an acryl-type monomer which has a cyclic structure of two or less rings, For example, (meth)acrylic acid cycloalkyl ester, such as (meth)acrylic acid cyclohexyl, (meth)acrylic acid aryl ester, such as (meth)acrylic acid phenyl, (meth)acrylic acid phenoxy (meth)acrylic acid aryloxyalkyl esters such as cyethyl, (meth)acrylic acid arylalkyl esters such as benzyl (meth)acrylate, ethylenic unsaturated having a cyclic structure in the molecule, such as styrene-based monomers such as styrene and α-methylstyrene and monomers.

Examples of the acrylic monomer having a cyclic structure of two or less rings preferably include (meth)acrylic acid esters having non-aromatic rings such as cyclohexyl methacrylate and isobornyl (meth)acrylate, from the viewpoint of transparency. , More preferably, methacrylic acid cyclohexyl is mentioned.

One type may be sufficient as the acrylic monomer which has a cyclic structure of two or less rings, and 2 or more types may be sufficient as it.

The content of the acrylic monomer having a bicyclic or less cyclic structure with respect to 100 parts by weight of the total monomer components contained in the monomer composition used to obtain the oligomer (Y) is preferably 50 parts by weight to 99 parts by weight, More preferably, it is 70 weight part - 99 weight part, More preferably, it is 80 weight part - 98 weight part, Especially preferably, it is 90 weight part - 97 weight part, Most preferably, it is 92 weight part - 96 weight part to be.

The oligomer (Y) may contain a carboxyl group-containing monomer as a monomer component. As such a carboxyl group-containing monomer, (meth)acrylic acid, itaconic acid, maleic acid, fumaric acid, crotonic acid, etc. are mentioned similarly to the carboxyl group containing monomer which can comprise an acrylic polymer, for example. Moreover, the acid anhydride (For example, acid anhydride group containing monomers, such as maleic anhydride and itaconic anhydride) of these carboxyl group containing monomers is also mentioned as a carboxyl group containing monomer.

The content ratio of the carboxyl group-containing monomer with respect to 100 parts by weight of all monomer components contained in the monomer composition used to obtain the oligomer (Y) is preferably 1 part by weight to 10 parts by weight, more preferably 2 parts by weight to 9 parts by weight, more preferably 3 to 8 parts by weight, and particularly preferably 4 to 7 parts by weight.

The monomer composition used in order to obtain the oligomer (Y) may contain other monomers other than the acryl-type monomer which has a bicyclic or less cyclic structure. The number of such other monomers may be one, and 2 or more types may be sufficient as them.

Examples of the other monomers include methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, isopropyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, (meth) Acrylic acid s-butyl, (meth)acrylic acid t-butyl, (meth)acrylic acid pentyl, (meth)acrylic acid hexyl, (meth)acrylic acid heptyl, (meth)acrylate octyl, (meth)acrylic acid 2-ethylhexyl, (meth)acrylic acid (meth)acrylic acid alkyl esters, such as isooctyl, (meth)acrylic-acid nonyl, (meth)acrylic-acid isononyl, (meth)acrylic-acid decyl, and (meth)acrylic-acid isodecyl; Epoxy group-containing acrylic monomers, such as (meth)acrylic-acid glycidyl and (meth)acrylic-acid methylglycidyl; vinyl ester-based monomers such as vinyl acetate and vinyl propionate; hydroxyl group-containing monomers such as hydroxyethyl (meth)acrylate, hydroxypropyl (meth)acrylate, and hydroxybutyl (meth)acrylate; (meth)acrylic acid alkoxyalkyl monomers such as methoxyethyl (meth)acrylate and ethoxyethyl (meth)acrylate; olefinic monomers such as ethylene, propylene, isoprene and butadiene; vinyl ether-based monomers such as vinyl ether; and the like.

Examples of the other monomer include hexanediol di(meth)acrylate, (poly)ethylene glycol di(meth)acrylate, (poly)propylene glycol di(meth)acrylate, neopentyl glycol di(meth)acrylate, Pentaerythritol di(meth)acrylate, glycerin di(meth)acrylate, trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, dipentaerythritol hexa(meth)acrylate, epoxy Polyfunctional monomers, such as an acrylate, polyester acrylate, a urethane acrylate, divinylbenzene, a butyl di (meth) acrylate, and a hexyl di (meth) acrylate, are also mentioned.

As another monomer, a nitrogen atom containing monomer (For example, (meth)acrylic acid aminoalkyl type, such as (meth)acrylic acid aminoethyl, (meth)acrylic acid N,N- dimethylaminoethyl, (meth)acrylic acid t-butylaminoethyl, etc.) Monomer: (N-substituted) amide-based monomers such as (meth)acrylamide, N,N-dimethyl (meth)acrylamide, N-butyl (meth)acrylamide, and N-hydroxy (meth)acrylamide; cyanoacrylate-based monomers such as nitrile and methacrylonitrile; isocyanate group-containing monomers such as 2-methacryloyloxyethyl isocyanate); However, since such a nitrogen atom-containing monomer may cause yellowing of the adhesive under heating, it is preferable not to use it when it does not need to use it.

The oligomer (X) and the oligomer (Y) can be prepared by any suitable polymerization method within a range that does not impair the effects of the present invention. Examples of the polymerization method of the acrylic polymer include a solution polymerization method, an emulsion polymerization method, a bulk polymerization method, and a polymerization method by ultraviolet irradiation. From the viewpoint of transparency, water resistance, cost, etc., the solution polymerization method is preferable .

As a polymerization initiator, a chain transfer agent, etc. which can be used at the time of superposition|polymerization, any suitable thing can be employ|adopted in the range which does not impair the effect of this invention.

The amount of the polymerization initiator to be used can be any appropriate amount within a range that does not impair the effects of the present invention. As such a usage-amount, 0.1 weight% - 15 weight% are preferable with respect to the monomer component whole quantity, for example.

Any appropriate amount of the chain transfer agent to be used can be employed within a range that does not impair the effects of the present invention. As such a usage-amount, 0.01 weight% - 15 weight% are preferable with respect to the monomer component whole quantity, for example.

In the solution polymerization method, various common solvents can be used. As such a solvent, For example, Ester, such as ethyl acetate and n-butyl acetate; aromatic hydrocarbons such as toluene and benzene; aliphatic hydrocarbons such as n-hexane and n-heptane; alicyclic hydrocarbons such as cyclohexane and methylcyclohexane; ketones such as methyl ethyl ketone and methyl isobutyl ketone; Organic solvents, such as these are mentioned. One type may be sufficient as a solvent, and 2 or more types may be sufficient as it.

The oligomers (X) and (Y) preferably have a weight average molecular weight of 3000 to 6000, more preferably 3300 to 5500, still more preferably 3500 to 5000.

The weight average molecular weight of the oligomers (X) and (Y) can be controlled by, for example, the type of polymerization initiator or chain transfer agent, the amount used, the temperature and time at the time of polymerization, the monomer concentration, the monomer dropping rate, and the like.

When the pressure-sensitive adhesive composition a2 contains an acrylic polymer and an oligomer, the ratio of the acrylic polymer to the oligomer is preferably 10 to 35 parts by weight, and more preferably the oligomer is 10 to 35 parts by weight with respect to 100 parts by weight of the acrylic polymer. is 15 parts by weight to 30 parts by weight. When the pressure-sensitive adhesive composition a2 contains the acrylic polymer and the oligomer, the effect of the present invention can be more expressed when the ratio of the acrylic polymer and the oligomer is within the above range.

The pressure-sensitive adhesive composition a2 contains, if necessary, known additives such as ultraviolet absorbers, antioxidants, light stabilizers, antioxidants, tackifiers, plasticizers, softeners, fillers, colorants (pigments and dyes, etc.), surfactants, and antistatic agents. it may be

<1-3. Release Sheet>

A peeling sheet may be provided on the surface of adhesive layer A2 for protection. One layer may be sufficient as a peeling sheet, and two or more layers may be sufficient as it.

The thickness of the release sheet is preferably 5 µm to 300 µm, more preferably 10 µm to 200 µm, still more preferably 10 µm to 150 µm, from the viewpoint of further expressing the effect of the present invention. , particularly preferably from 10 μm to 130 μm, and most preferably from 20 μm to 120 μm.

The release sheet includes a resin base film.

As a resin base film, For example, the plastic film comprised from polyester-type resin, such as a polyethylene terephthalate (PET), a polyethylene naphthalate (PEN), and a polybutylene terephthalate (PBT); Plastics composed of olefinic resins containing α-olefins such as polyethylene (PE), polypropylene (PP), polymethylpentene (PMP), ethylene-propylene copolymer, and ethylene-vinyl acetate copolymer (EVA) as a monomer component film; a plastic film composed of polyvinyl chloride (PVC); a plastic film composed of a vinyl acetate-based resin; plastic film composed of polycarbonate (PC); a plastic film composed of polyphenylene sulfide (PPS); plastic films composed of amide-based resins such as polyamide (nylon) and wholly aromatic polyamide (aramid); a plastic film composed of a polyimide-based resin; plastic film composed of polyetheretherketone (PEEK); plastic films composed of olefin-based resins such as polyethylene (PE) and polypropylene (PP); Fluorine resins such as polytetrafluoroethylene, polychlorotrifluoroethylene, polyvinyl fluoride, polyvinylidene fluoride, tetrafluoroethylene-hexafluoropropylene copolymer, chlorofluoroethylene-vinylidene fluoride copolymer, etc. made up of plastic film; and the like.

One layer may be sufficient as a resin base film, and two or more layers may be sufficient as it. The resin base film may be stretched.

The resin base film may be surface-treated. Examples of the surface treatment include corona treatment, plasma treatment, chromic acid treatment, ozone exposure, flame exposure, high-pressure electric shock exposure, ionizing radiation treatment, and coating treatment with a primer.

The resin base film may contain arbitrary appropriate additives in the range which does not impair the effect of this invention.

A release sheet may have a release layer in order to improve the peelability from adhesive layer A2. When the release sheet has a release layer, the side of the release layer is directly laminated on the pressure-sensitive adhesive layer A2.

As the material for forming the mold release layer, any appropriate material for forming the mold release layer can be adopted as long as the effects of the present invention are not impaired. As such a forming material, a silicone type mold release agent, a fluorine type mold release agent, a long-chain alkyl type mold release agent, a fatty acid amide type mold release agent, etc. are mentioned, for example. Among these, a silicone type mold release agent is preferable. The release layer can be formed as an application layer.

As the thickness of the mold release layer, any appropriate thickness can be adopted according to the purpose within a range that does not impair the effects of the present invention. The thickness is preferably 10 nm to 2000 nm, more preferably 10 nm to 1500 nm, still more preferably 10 nm to 1000 nm, particularly preferably 10 nm to 500 nm.

The number of mold release layers may be one, and two or more layers may be sufficient as them.

As a silicone type mold release layer, an addition reaction type silicone resin is mentioned, for example. Specific examples of the addition reaction type silicone resin include KS-774, KS-775, KS-778, KS-779H, KS-847H, KS-847T manufactured by Shin-Etsu Chemical; TPR-6700, TPR-6710, TPR-6721 made by Toshiba Silicone; SD7220 and SD7226 manufactured by Toray Dow Corning; and the like. The application amount (after drying) of the silicone-based release layer is preferably 0.01 g/m 2 to 2 g/m 2, more preferably 0.01 g/m 2 to 1 g/m 2, further preferably 0.01 g/m 2 to 0.5 g/m 2 is m2.

Formation of the release layer is, for example, after applying the forming material on any appropriate layer by a conventionally known application method such as reverse gravure coat, bar coat, die coat, etc., heat treatment at about 120 to 200°C usually It can be carried out by hardening by performing. Moreover, you may use together heat processing and active energy ray irradiation, such as ultraviolet irradiation, as needed.

The release sheet may have an antistatic layer.

As the thickness of the antistatic layer, any appropriate thickness can be adopted within a range that does not impair the effects of the present invention. As such thickness, Preferably they are 1 nm - 1000 nm, More preferably, they are 5 nm - 900 nm, More preferably, they are 7.5 nm - 800 nm, Especially preferably, they are 10 nm - 700 nm.

The number of antistatic layers may be one, and two or more layers may be sufficient as them.

As the antistatic layer, any suitable antistatic layer can be employed as long as it is a layer capable of exhibiting an antistatic effect, within a range that does not impair the effects of the present invention. As such an antistatic layer, Preferably, it is an antistatic layer formed by coating the electrically conductive coating liquid containing a conductive polymer on arbitrary suitable base material layers. Specifically, for example, it is an antistatic layer formed by coating a conductive coating liquid containing a conductive polymer on a resin base film. Specific examples of the coating method include a roll coating method, a bar coating method, and a gravure coating method.

As a conductive polymer, any suitable conductive polymer can be employ|adopted in the range which does not impair the effect of this invention. As such a conductive polymer, the conductive polymer etc. by which the polyvalent anion was doped to (pi) conjugated type conductive polymer are mentioned, for example. Examples of the ?-conjugated conductive polymer include chain conductive polymers such as polythiophene, polypyrrole, polyaniline, and polyacetylene. Examples of the polyvalent anion include polystyrenesulfonic acid, polyisoprenesulfonic acid, polyvinylsulfonic acid, polyallylsulfonic acid, polyacrylic acid ethylsulfonic acid, and polymethacrylic carboxylic acid. The number of conductive polymers may be one, and 2 or more types may be sufficient as them.

<1-4. functional layer A3>

The film for reinforcement may contain the functional layer A3, the base material layer A1, and the adhesive layer A2 in this order. That is, as shown in FIG. 2, another one Embodiment of the film for reinforcement consists of a functional layer A330, base material layer A1(10), and adhesive layer A2(20).

Functional layer A3 is a layer which may be provided arbitrarily, and is a layer which can provide various functions to the film for reinforcement.

As the thickness of the functional layer A3, any appropriate thickness can be adopted according to the purpose within a range that does not impair the effects of the present invention. The thickness is preferably 1 nm to 1000 nm, more preferably 2 nm to 800 nm, still more preferably 5 nm to 400 nm, and particularly preferably 10 nm to 200 nm.

One layer may be sufficient as functional layer A3, and two or more layers may be sufficient as it.

As functional layer A3, any suitable functional layer can be employ|adopted in the range which does not impair the effect of this invention. As such a functional layer, an antistatic layer, an antireflection layer, an antiglare layer, a hard coat layer, etc. are mentioned, for example, From the point which can express the effect of this invention more, an antireflection layer can be selected.

As the antireflection layer, any appropriate antireflection layer can be employed as long as the effects of the present invention are not impaired. As such an antireflection layer, the antireflection layer of Unexamined-Japanese-Patent No. 2019-144577 etc. is mentioned, for example.

As the functional layer A3, an antistatic layer may also be preferably selected in order to exhibit an antistatic effect.

When both an antireflection layer and an antistatic layer are selected as functional layer A3, it is preferable to arrange|position an antistatic layer on the base material layer A1 side from the point which can express the function of an antireflection layer more.

As the antistatic layer, any suitable antistatic layer can be employed as long as it is a layer capable of exhibiting an antistatic effect, within a range that does not impair the effects of the present invention. As such an antistatic layer, Preferably, it is an antistatic layer formed by coating the electrically conductive coating liquid containing a conductive polymer on arbitrary suitable base material layers. Specifically, for example, it is an antistatic layer formed by coating a conductive coating liquid containing a conductive polymer on the base layer A1. Specific examples of the coating method include a roll coating method, a bar coating method, and a gravure coating method.

As a conductive polymer, any suitable conductive polymer can be employ|adopted in the range which does not impair the effect of this invention. As such a conductive polymer, the conductive polymer etc. by which the polyvalent anion was doped to (pi) conjugated type conductive polymer are mentioned, for example. Examples of the ?-conjugated conductive polymer include chain conductive polymers such as polythiophene, polypyrrole, polyaniline, and polyacetylene. Examples of the polyvalent anion include polystyrenesulfonic acid, polyisoprenesulfonic acid, polyvinylsulfonic acid, polyallylsulfonic acid, polyacrylic acid ethylsulfonic acid, and polymethacrylic carboxylic acid.

<1-5. Use of reinforcing film, optical member with reinforcing film, electronic member with reinforcing film>

The film for reinforcement of this invention is affixed to the to-be-adhered body which is arbitrary appropriate members. Typically, the film for reinforcement of this invention is affixed to the to-be-adhered body which is an optical member or an electronic member. In this case, the exposed surface side of adhesive layer A2 of the film for reinforcement of this invention is affixed to the to-be-adhered body which is an optical member or an electronic member. In this way, the optical member with the film for reinforcement or the electronic member with the film for reinforcement of this invention is obtained. That is, the optical member with a film for reinforcement or the electronic member with a film for reinforcement of this invention is equipped with the film for reinforcement of this invention.

≪2. Surface protection film≫

A surface protection film is arrange|positioned at the base material layer A1 side of the film for reinforcement. When base material layer A1 has functional layer A3, a surface protection film is arrange|positioned at the functional layer A3 side.

As the thickness of the surface protection film, any appropriate thickness can be adopted according to the purpose within a range that does not impair the effects of the present invention. As such thickness, Preferably they are 4 micrometers - 500 micrometers, More preferably, they are 10 micrometers - 400 micrometers, More preferably, they are 15 micrometers - 350 micrometers, Especially preferably, they are 20 micrometers - 300 micrometers.

A surface protection film contains base material layer B1 and adhesive layer B2. As long as the surface protection film has the base material layer B1 and the adhesive layer B2, it may have arbitrary appropriate other layers in the range which does not impair the effect of this invention.

A release sheet may be provided on the surface of the pressure-sensitive adhesive layer B2 for protection.

In order to provide various functions on the surface of the base material layer B1, the functional layer B3 may be provided.

As the thickness of the surface protection film, any appropriate thickness can be adopted according to the purpose within a range that does not impair the effects of the present invention. As such thickness, Preferably they are 5 micrometers - 500 micrometers, More preferably, they are 10 micrometers - 450 micrometers, More preferably, they are 15 micrometers - 400 micrometers, Especially preferably, they are 20 micrometers - 300 micrometers.

One embodiment of a surface protection film consists of base material layer B1 (40), adhesive layer B2 (50), and the release sheet|seat 60, as shown in FIG.

One embodiment of a surface protection film consists of functional layer B3 (70), base material layer B1 (40), adhesive layer B2 (50), and the release sheet|seat 60, as shown in FIG.

<2-1. Base layer B1>

As base material layer B1, the base material formed from arbitrary suitable materials according to the objective can be employ|adopted in the range which does not impair the effect of this invention. As such a material, for example, <1-1. What was illustrated in the item of base material layer A1> is mentioned.

One layer may be sufficient as base material layer B1, and two or more layers may be sufficient as it.

As thickness of base material layer B1, it is the range which does not impair the effect of this invention, and arbitrary appropriate thickness is employable according to the objective. As such a thickness, Preferably they are 4 micrometers - 350 micrometers, More preferably, they are 8 micrometers - 325 micrometers, More preferably, they are 12 micrometers - 290 micrometers, Especially preferably, they are 15 micrometers - 205 micrometers.

The base material layer B1 may contain the antistatic agent. As the base material layer B1 containing the antistatic agent, for example, a resin sheet in which the antistatic agent has been beaten and put therein can be used. Such a resin sheet may be formed of a composition for forming the base layer B1 including a resin and an antistatic agent.

The base layer B1 itself may act as an antistatic agent. For example, when metal foil is employ|adopted as a material of base material layer B1, base material layer B1 itself can act as an antistatic agent.

The base material layer B1 may be surface-treated. Examples of the surface treatment include corona treatment, plasma treatment, chromic acid treatment, ozone exposure, flame exposure, high-pressure electric shock exposure, ionizing radiation treatment, and coating treatment with a primer.

As an organic coating material, <1-1. What was illustrated in the item of base material layer A1> is mentioned.

The base material layer B1 may contain arbitrary appropriate other additives according to the objective in the range which does not impair the effect of this invention.

<2-2. Adhesive layer B2>

As thickness of adhesive layer B2, it is the range which does not impair the effect of this invention, and arbitrary appropriate thickness is employable according to the objective. As such thickness, Preferably they are 1 micrometer - 150 micrometers, More preferably, they are 2 micrometers - 125 micrometers, More preferably, they are 3 micrometers - 110 micrometers, Especially preferably, they are 5 micrometers - 95 micrometers.

As adhesive layer B2, the adhesive layer comprised from arbitrary appropriate adhesives is employable in the range which does not impair the effect of this invention. Examples of the pressure-sensitive adhesive include the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer described in Japanese Patent Application Laid-Open No. 2019-127526, preferably selected from the group consisting of the acrylic pressure-sensitive adhesive, urethane pressure-sensitive adhesive, and silicone pressure-sensitive adhesive described in the publication. At least 1 type is mentioned.

<2-3. Release Sheet>

A release sheet may be provided on the surface of the pressure-sensitive adhesive layer B2 for protection. One layer may be sufficient as a peeling sheet, and two or more layers may be sufficient as it.

About the release sheet which a surface protection film may have, <1-3. The description in the item of release sheet> can be referred.

<2-4. functional layer B3>

The surface protection film may contain the functional layer B3, the base material layer B1, and the adhesive layer B2 in this order.

Functional layer B3 is a layer which may be provided arbitrarily, and is a layer which can provide various functions to the film for reinforcement.

As the thickness of the functional layer B3, any appropriate thickness can be adopted according to the purpose within a range that does not impair the effects of the present invention. The thickness is preferably 1 nm to 1000 nm, more preferably 2 nm to 800 nm, still more preferably 5 nm to 400 nm, and particularly preferably 10 nm to 200 nm.

The number of functional layers B3 may be one, and two or more layers may be sufficient as them.

For the functional layer B3, <1-4. The description in the item of functional layer A3> can be cited.

≪3. Reinforcement film with surface protection film≫

The film for reinforcement with a surface protection film of this invention is equipped with a surface protection film on the base material layer A1 side of the film for reinforcement of this invention. When the film for reinforcement of this invention further has functional layer A3 on base material layer A1, a surface protection film is equipped on the surface of this functional layer A3.

The film for reinforcement with a surface protection film of this invention has a film for reinforcement and a surface protection film. As long as the film for reinforcement with a surface protection film of this invention has a film for reinforcement and a surface protection film, it may have any appropriate other layer within the range which does not impair the effect of this invention.

In the reinforcing film with a surface protection film of this invention, the reinforcing film contains the base material layer A1 and the adhesive layer A2, and the surface protection film contains the base material layer B1 and the adhesive layer B2.

As the thickness of the reinforcing film with a surface protection film of the present invention, any appropriate thickness can be adopted according to the purpose within a range that does not impair the effects of the present invention. As such thickness, Preferably they are 9 micrometers - 1300 micrometers, More preferably, they are 20 micrometers - 1050 micrometers, More preferably, they are 35 micrometers - 900 micrometers, Especially preferably, they are 45 micrometers - 750 micrometers.

The reinforcing film provided with a surface protection film of the present invention comprises the reinforcing film and the surface protection film, the adhesive of the substrate layer A1 (when the functional layer A3 is further provided on the substrate layer A1, the functional layer A3) and the surface protection film It can be obtained by laminating|stacking so that layer B2 (When the peeling sheet is provided on the adhesive layer B2, the adhesive layer B2 which peeled and exposed this peeling sheet) may be laminated|stacked directly.

As shown in FIG. 5, one Embodiment of the film for reinforcement with a surface protection film of this invention is a reinforcement film which consists of a base material layer A1 (10) and adhesive layer A2 (20), and base material layer B1 (40) The surface protection film which consists of and adhesive layer B2(50) is a form in which the base material layer A1(10) and adhesive layer B2(50) were laminated|stacked so that it may be laminated|stacked directly.

The reinforcing film with a surface protection film of this invention is 580 nm of the reinforcing film after peeling the surface protection film after storing the said reinforcing film with a surface protection film in the environment of 60 degreeC and 90%RH for one week. is preferably 5.0% or less, more preferably 4.8%, still more preferably 4.5%, still more preferably 4.2%, still more preferably 4.0%, particularly preferably 3.7%, most preferably 3.5%. If the light reflectance change rate is within the above range, it is possible to provide a reinforcing film in which inspection properties do not deteriorate when an optical member or an electronic member is inspected over the reinforcing film.

≪4. Usage form of reinforcement film≫

The film for reinforcement of this invention is affixed to the to-be-adhered body which is an optical member or an electronic member typically. Specifically, the exposed surface of the pressure-sensitive adhesive layer A2 of the reinforcing film of the present invention is affixed to the adherend which is an optical member or an electronic member. When the peeling sheet is provided in the surface of adhesive layer A2, adhesive layer A2 peeled and exposed this peeling sheet is affixed to the to-be-adhered body which is an optical member or an electronic member.

As a to-be-adhered body which is the said optical member or an electronic member, LED, micro LED, mini LED, and OLED are mentioned, for example. As such an adherend, it is typically OLED.

Since the effect expressed by the reinforcing film of the present invention can be further utilized, the OLED is preferably at least one selected from the group consisting of a foldable member, a flexible member, and a rollable member.

The foldable member is a member having a movable bent portion (foldable), the flexible member is a member capable of being bent, and the rollable member is a member capable of being rounded.

≪5. How to use the reinforcing film with the surface protection film≫

In the method of using the laminated film with a surface protection film of the present invention, the pressure-sensitive adhesive layer A2 included in the reinforcing film with a surface protection film of the present invention is exposed, the pressure-sensitive adhesive layer A2 is adhered to the adherend, and then the surface protection film is peel off In the reinforcing film with a surface protection film of the present invention, when a release sheet is provided on the surface of the pressure-sensitive adhesive layer A2, first, the release sheet is peeled to expose the surface of one pressure-sensitive adhesive layer of the pressure-sensitive adhesive layer A2, and the pressure-sensitive adhesive layer The surface is affixed to the adherend. Next, the surface protection film is peeled off.

In this way, the member to which the film for reinforcement was affixed to the to-be-adhered body is obtained.

Example

Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited at all by these Examples. In addition, the test and evaluation method in an Example etc. are as follows. In addition, when described as "part", unless otherwise specified, "part by weight" is meant, and when described as "%", "% by weight" is meant unless otherwise specified.

<Measurement of Weight Average Molecular Weight>

The weight average molecular weight was measured by the gel permeation chromatography (GPC) method. Specifically, as a GPC measuring apparatus, using a brand name "HLC-8120GPC" (manufactured by Tosoh Corporation), it measured on the following conditions, and computed with standard polystyrene conversion value.

(Molecular weight measurement conditions)

ㆍSample concentration: 0.2 wt% (tetrahydrofuran solution)

ㆍSample injection volume: 10μL

ㆍColumn: Product name “TSKguardcolumn SuperHZ-H (1EA) + TSKgel SuperHZM-H (2EA)” (manufactured by Tosoh Corporation)

ㆍReference column: trade name "TSKgel SuperH-RC (1 pc)" (manufactured by Tosoh Corporation)

ㆍEluent: tetrahydrofuran (THF)

ㆍFlow: 0.6mL/min

ㆍDetector: Differential Refractometer (RI)

ㆍColumn temperature (measured temperature): 40℃

<Light reflectance change rate (without surface protection film)>

After peeling the release sheet from the reinforcement film obtained in the Example or the comparative example and bonding the adhesive surface of the reinforcement film to a 1 mm-thick black acrylic plate, the light reflectance from the base material side in 580 nm was measured spectrophotometer (Hitachi It was measured by the Seisakusho Corporation make, model: U-4100), and light reflectance R1 (%) was calculated|required. Next, the reinforcing film obtained in Examples or Comparative Examples was stored for one week under an environment of 60° C. and 90% RH, left at 23° C. for 30 minutes, returned to room temperature, and the reinforcing film remaining after peeling the release sheet Similarly, after bonding the adhesive surface of the film for reinforcement to the black acrylic board of thickness 1mm, the light reflectance from the base material side in 580 nm was measured, and light reflectance R2 (%) was calculated|required. Using the obtained value of the light reflectance, the rate of change of the light reflectance (the rate of change of the light reflectance) ?R(%)=(R2-R1)/(R1)×100 was calculated. In addition, if the said black acrylic board is a black resin board, since there is no influence on a measured value, another black resin board is employable.

<Light reflectance change rate (with surface protection film)>

After peeling the release sheet from the reinforcement film obtained in the Example or the comparative example and bonding the adhesive surface of the reinforcement film to a 1 mm-thick black acrylic plate, the light reflectance from the base material side in 580 nm was measured spectrophotometer (Hitachi It was measured by the Seisakusho Corporation make, model: U-4100), and light reflectance R1 (%) was calculated|required. Next, the laminate of the reinforcing film and the surface protection film obtained in the corresponding Example or Comparative Example (reinforcing film with a surface protection film) was stored for one week under an environment of 60°C and 90% RH, and then stored at 23°C for 30°C. After leaving it to stand for a minute, returning to room temperature, peeling a surface protection film and a peeling sheet, the base material side in 580 nm after similarly bonding the adhesive surface of the reinforcement film to the black acrylic board of thickness 1mm with respect to the remaining reinforcing film. The light reflectance was measured, and the light reflectance R2 (%) was calculated|required. Using the obtained value of the light reflectance, the rate of change of the light reflectance (the rate of change of the light reflectance) ?R(%)=(R2-R1)/(R1)×100 was calculated. In addition, if the said black acrylic board is a black resin board, since there is no influence on a measured value, another black resin board is employable.

<Haze change rate>

The release sheet was peeled off from the reinforcing film obtained in the Example or the comparative example, the haze was measured with the haze meter (made by Murakami Shikisai, model: HM-150), and the haze H1 (%) was calculated|required. Next, the reinforcing film obtained in Examples or Comparative Examples was stored for one week under an environment of 60° C. and 90% RH, left at 23° C. for 30 minutes, returned to room temperature, and the reinforcing film remaining after peeling the release sheet The haze was similarly measured and the haze H2 (%) was calculated|required about it. Using the obtained haze value, haze change rate ΔH (%) = (H2-H1)/(H1)×100 was calculated.

<Total light transmittance>

The transmittance|permeability in 580 nm of the base material layer used by an Example or a comparative example was measured using the spectrophotometer (made by Hitachi Seisakusho, model: U-4100).

<Adhesive strength of PET film>

The reinforcing film (width 25 mm x length 140 mm) from which the release sheet was peeled was adhered to the PET film "Lumiror S10#25" (manufactured by Toray Industries, Ltd.) laminated to glass with a 2 kg hand roller in one reciprocation. Then, it was left to stand for 30 minutes under the environmental temperature of 23 degreeC.

The evaluation sample obtained as described above was measured with a tensile tester. As a tensile testing machine, the brand name "Autograph AG-Xplus HS 6000 mm/min high-speed model (AG-50NX plus)" manufactured by Shimadzu Corporation was used. After setting the sample for evaluation in the tensile tester, the tensile test was started. The conditions of the tensile test were: peeling angle: 180 degrees, peeling speed (tensile speed): 300 mm/min. The load at the time of peeling the reinforcing film from the said PET film was measured, and the average load at that time was made into the adhesive force of the PET film-to-PET film of the reinforcing film.

<Adhesive strength of large PET film (after heating at 60°C for 60 minutes)>

The reinforcing film (width 25 mm x length 140 mm) from which the release sheet was peeled was adhered to the PET film "Lumiror S10#25" (manufactured by Toray Industries, Ltd.) laminated to glass with a 2 kg hand roller in one reciprocation. Then, it was left to stand for 60 minutes under the environmental temperature of 60 degreeC.

The evaluation sample obtained as described above was measured with a tensile tester. As a tensile testing machine, the brand name "Autograph AG-Xplus HS 6000 mm/min high-speed model (AG-50NX plus)" manufactured by Shimadzu Corporation was used. After setting the sample for evaluation in the tensile tester, the tensile test was started. The conditions of the tensile test were: peeling angle: 180 degrees, peeling speed (tensile speed): 300 mm/min. The load at the time of peeling the reinforcing film from the said PET film was measured, and the average load at that time was made into the adhesive force of the PET film-to-PET film of the reinforcing film.

[Preparation Example 1]: Preparation of (meth)acrylic polymer (1)

In a 4-neck flask equipped with a stirring blade, a thermometer, a nitrogen gas introduction tube, and a cooler, 2-ethylhexyl acrylate (manufactured by Nippon Shokubai Co., Ltd.): 65 parts, N-vinylpyrrolidone (manufactured by Nippon Shokubai Co., Ltd.): 15 parts, hydroxyethyl acrylate (manufactured by Toagosei Corporation): 13 parts, methyl methacrylate (manufactured by Mitsubishi Gas Chemical Corporation): 7 parts, 2,2'-azobisisobutyronitrile (Wako Pure Chemical Industries, Ltd.) as a polymerization initiator Manufactured by Kogyo Co.): 0.2 parts, ethyl acetate: 156 parts by weight, nitrogen gas was introduced while gently stirring, and polymerization reaction was performed for 10 hours while maintaining the liquid temperature in the flask at around 63° C., and a weight average molecular weight of 700,000 (meth ) A solution (solid content concentration = 40 wt%) of the acrylic polymer (1) was prepared.

[Preparation Example 2]: Preparation of (meth)acrylic polymer (2)

In a four-neck flask equipped with a stirring blade, a thermometer, a nitrogen gas inlet tube, and a cooler, butyl acrylate (manufactured by Nippon Shokubai Co., Ltd.): 100 parts, acrylic acid (manufactured by Toagosei Co., Ltd.): 7.5 parts, 2,2' as a polymerization initiator -Azobisisobutyronitrile (manufactured by Wako Pure Chemical Industries, Ltd.): 0.2 parts, ethyl acetate: 156 parts by weight were added, nitrogen gas was introduced while gently stirring, and the liquid temperature in the flask was maintained at around 63 ° C. and polymerized for 10 hours. It reacted to prepare the solution (solid content concentration = 40 weight%) of the (meth)acrylic-type polymer (2) of 700,000 weight average molecular weights.

[Preparation Example 3]: Preparation of (meth)acrylic polymer (3)

In a 4-neck flask equipped with a stirring blade, a thermometer, a nitrogen gas introduction tube, and a cooler, 2-ethylhexyl acrylate (manufactured by Nippon Shokubai Co., Ltd.): 96 parts, hydroxyethyl acrylate (manufactured by Toagosei Corporation): 4 parts, As a polymerization initiator, 2,2'-azobisisobutyronitrile (manufactured by Wako Pure Chemical Industries, Ltd.): 0.2 parts, ethyl acetate: 156 parts by weight were charged, nitrogen gas was introduced while gently stirring, and the liquid temperature in the flask was set to 63°C. The polymerization reaction was performed for 10 hours by holding|maintaining in vicinity, and the solution (solid content concentration = 40 weight%) of the (meth)acrylic-type polymer (3) of 500,000 weight average molecular weights was prepared.

[Preparation Example 4]: Preparation of (meth)acrylic oligomer (4)

Cyclohexyl methacrylate [glass transition temperature of homopolymer (cyclohexyl polymethacrylate): 66° C.] as a monomer component: 95 parts by weight, acrylic acid: 5 parts by weight, 2-mercaptoethanol as a chain transfer agent: 3 parts by weight , 2,2'-azobisisobutyronitrile as a polymerization initiator: 0.2 parts by weight and toluene as a polymerization solvent: 103.2 parts by weight were put into a separable flask, and stirred for 1 hour while introducing nitrogen gas. In this way, after oxygen in the polymerization system was removed, the temperature was raised to 70° C. and reacted for 3 hours, and then reacted at 75° C. for 2 hours, and a solution of (meth)acrylic oligomer (4) having a weight average molecular weight of 4000 (solid content concentration = 50% by weight) was prepared.

[Preparation Example 5]: Preparation of (meth)acrylic oligomer (5)

100 parts by weight of toluene, dicyclofentanyl methacrylate (DCPMA) (trade name: FA-513M, manufactured by Hitachi Kasei Kogyo Co., Ltd.): 60 to a four-necked flask equipped with a stirring blade, thermometer, nitrogen gas introduction tube, cooler, and dropping funnel Parts by weight, methyl methacrylate (MMA): 40 parts by weight and methyl thioglycolate as a chain transfer agent: 3.5 parts by weight were added. Then, after stirring for 1 hour at 70° C. under a nitrogen atmosphere, 0.2 parts by weight of 2,2′-azobisisobutyronitrile as a polymerization initiator was added and reacted at 70° C. for 2 hours, followed by reaction at 80° C. for 4 hours. After making it, it was made to react at 90 degreeC for 1 hour, and the solution (solid content concentration = 51 weight%) of the (meth)acrylic-type oligomer (5) of 4000 weight average molecular weight was prepared.

[Preparation Example 6]: Preparation of (meth)acrylic oligomer (6)

To a four-neck flask equipped with a stirring blade, a thermometer, a nitrogen gas introduction tube, a cooler, and a dropping funnel, 100 parts by weight of toluene, 40 parts by weight of methyl methacrylate (MMA), 20 parts by weight of butyl methacrylate (BMA), 2 -Ethylhexyl methacrylate (2-EHMA) 20 parts by weight, a methacrylate monomer containing a polyorganosiloxane skeleton having a functional group equivalent of 900 g/mol (trade name: X-22-174ASX, Shin-Etsu Chemical Co., Ltd.) agent) 17 parts by weight, a polyorganosiloxane skeleton-containing methacrylate monomer having a functional group equivalent of 4600 g/mol (trade name: X-22-174DX, manufactured by Shin-Etsu Chemical Co., Ltd.) 3 parts by weight and as a chain transfer agent 0.51 parts by weight of methyl thioglycolate was added. Then, after stirring at 70° C. under a nitrogen atmosphere for 1 hour, 0.2 parts by weight of azobisisobutyronitrile as a thermal polymerization initiator was added, and after reacting at 70° C. for 2 hours, azobisisobutyronitrile 0.1 as a thermal polymerization initiator A weight part was thrown in, and it was made to react at 80 degreeC for 5 hours then, and the solution (solid content concentration = 50 weight%) of the (meth)acrylic-type oligomer (6) of 21300 weight average molecular weights was prepared.

[Preparation Example 7]: Preparation of (meth)acrylic pressure-sensitive adhesive composition (1)

In the solution of the (meth)acrylic polymer (1) obtained in Production Example 1, with respect to 100 parts by weight of the solid content of the solution of the (meth)acrylic polymer (1), Coronate HL (manufactured by Nippon Polyurethane Co., Ltd.) as a crosslinking agent in terms of solid content After adding 1.0 weight part, it diluted with ethyl acetate so that the total solid content might be 25 weight%, it stirred with a disper, and the (meth)acrylic-type adhesive composition (1) was prepared.

[Preparation Example 8]: Preparation of (meth)acrylic pressure-sensitive adhesive composition (2)

In the solution of the (meth)acrylic polymer (2) obtained in Production Example 2, TETRAD-C (manufactured by Mitsubishi Gas Chemical) as a crosslinking agent was converted into solid content with respect to 100 parts by weight of the solid content of the solution of the (meth)acrylic polymer (2). 0.075 parts by weight, 20 parts by weight of the solution of the (meth)acrylic oligomer (4) obtained in Production Example 4 in terms of solid content was added, diluted with ethyl acetate so that the total solid content of the solution was 25% by weight, and stirred with a disper Thus, a (meth)acrylic pressure-sensitive adhesive composition (2) was prepared.

[Preparation Example 9]: Preparation of (meth)acrylic pressure-sensitive adhesive composition (3)

In the solution of the (meth)acrylic polymer (3) obtained in Production Example 3, with respect to 100 parts by weight of the solid content of the solution of the (meth)acrylic polymer (3), Coronate HL (manufactured by Nippon Polyurethane Co., Ltd.) as a crosslinking agent in terms of solid content 0.1 parts by weight, 5 parts by weight of the solution of the (meth)acrylic oligomer (5) obtained in Production Example 5 in terms of solid content is added, diluted with ethyl acetate so that the total solid content is 25% by weight, and stirred with a disper, A (meth)acrylic pressure-sensitive adhesive composition (3) was prepared.

[Preparation Example 10]: Preparation of (meth)acrylic pressure-sensitive adhesive composition (4)

In the solution of the (meth)acrylic polymer (3) obtained in Production Example 3, with respect to 100 parts by weight of the solid content of the solution of the (meth)acrylic polymer (3), Coronate HL (manufactured by Nippon Polyurethane Co., Ltd.) as a crosslinking agent in terms of solid content 0.1 parts by weight, 7.5 parts by weight of the solution of the (meth)acrylic oligomer (5) obtained in Production Example 5 in terms of solid content is added, diluted with ethyl acetate so that the total solid content is 25% by weight, and stirred with a disper, A (meth)acrylic pressure-sensitive adhesive composition (4) was prepared.

[Preparation Example 11]: Preparation of (meth)acrylic pressure-sensitive adhesive composition (5)

In the solution of the (meth)acrylic polymer (3) obtained in Production Example 3, with respect to 100 parts by weight of the solid content of the solution of the (meth)acrylic polymer (3), Coronate HL (manufactured by Nippon Polyurethane Co., Ltd.) as a crosslinking agent in terms of solid content 0.1 parts by weight, 10 parts by weight of the solution of the (meth)acrylic oligomer (5) obtained in Production Example 5 in terms of solid content is added, diluted with ethyl acetate so that the total solid content is 25% by weight, and stirred with a disper, A (meth)acrylic pressure-sensitive adhesive composition (5) was prepared.

[Preparation Example 12]: Preparation of (meth)acrylic pressure-sensitive adhesive composition (6)

In the solution of the (meth)acrylic polymer (3) obtained in Production Example 3, with respect to 100 parts by weight of the solid content of the solution of the (meth)acrylic polymer (3), Coronate HL (manufactured by Nippon Polyurethane Co., Ltd.) as a crosslinking agent in terms of solid content After adding 4.0 weight part, it diluted with ethyl acetate so that the whole solid content might be 25 weight%, it stirred with a disper, and the (meth)acrylic-type adhesive composition (6) was prepared.

[Preparation Example 13]: Preparation of (meth)acrylic pressure-sensitive adhesive composition (7)

In the solution of the (meth)acrylic polymer (1) obtained in Production Example 1, with respect to 100 parts by weight of the solid content of the solution of the (meth)acrylic polymer (1), Coronate HL (manufactured by Nippon Polyurethane Co., Ltd.) as a crosslinking agent in terms of solid content 1.0 part by weight, 2.0 parts by weight of the solution of the (meth)acrylic oligomer (6) obtained in Production Example 6 was added in terms of solid content, diluted with ethyl acetate so that the total solid content was 25% by weight, and stirred with a disper, A (meth)acrylic pressure-sensitive adhesive composition (7) was prepared.

[Preparation Example 14]: Preparation of (meth)acrylic pressure-sensitive adhesive composition (8)

In the solution of the (meth)acrylic polymer (1) obtained in Production Example 1, with respect to 100 parts by weight of the solid content of the solution of the (meth)acrylic polymer (1), Coronate HL (manufactured by Nippon Polyurethane Co., Ltd.) as a crosslinking agent in terms of solid content 2.5 parts by weight, 2.5 parts by weight of the solution of the (meth)acrylic oligomer (6) obtained in Production Example 6 is added in terms of solid content, diluted with ethyl acetate so that the total solid content is 25% by weight, and stirred with a disper, A (meth)acrylic pressure-sensitive adhesive composition (8) was prepared.

[Preparation Example 15]: Preparation of a coating composition for forming an anti-reflection layer

In a 200 mL glass container, ethanol: 60 g, aqueous dispersion sol of ZnO fine particles (average primary particle diameter: 20 nm, average aggregate particle diameter: 40 nm, solid content conversion concentration: 20 wt%): 30 g, tetraethoxysilane (SiO ₂ solid content concentration) : 29% by weight): 10 g was added, an aqueous ammonia solution was added to adjust the pH to 10, and the mixture was stirred at 20° C. for 6 hours to obtain a dispersion of core-shell particles (solid content concentration: 6% by weight): 100 g. To 100 g of the obtained dispersion of core-shell particles, 100 g of a strongly acidic cation exchange resin (total exchange capacity: 2.0 meq/mL or more) was added, stirred for 1 hour to bring the pH to 4, and then filtered to obtain a strongly acidic cation exchange resin. It removed and obtained the dispersion liquid of the spherical hollow microparticles|fine _- particles which consists of SiO2. The obtained dispersion liquid was concentrated to 20 weight% of solid content concentration by ultrafiltration. The spherical hollow fine particles were secondary agglomerated. The thickness of the outer shell of the spherical hollow fine particles was 5 nm, and was 1/6 of the average primary particle diameter. The average aggregated particle diameter of the spherical hollow microparticles|fine-particles was 40 nm, and the aspect-ratio was 1.0.

In a 200 mL glass container, the obtained dispersion of spherical hollow fine particles (solid content concentration: 20% by weight): 2 g, dispersion of fibrous solid fine particles (manufactured by Nissan Chemical Industry Co., Ltd., IPA-ST-UP, average aggregate particle diameter (average primary particle diameter)) : 90 nm, aspect ratio: 7.0, solid content concentration: 15 wt%): 2 g, ethanol: 90 g, silicic acid oligomer solution (solid content concentration: 5 wt%): 6 g, stirred for 10 minutes, to obtain a coating composition for forming an antireflection layer got it

[Production Example 16]: Preparation of TAC film base material (A) having antireflection layer

The coating composition for forming an antireflection layer obtained in Production Example 15 is applied to one side of a cellulose triacetate (hereinafter, sometimes referred to as "TAC") film (TG60UL, manufactured by Fujifilm), and spin-coated at a rotation speed of 200 rpm for 60 seconds. After homogenization, it dried at 200 degreeC for 30 minutes, and formed the antireflection layer with a film thickness of 100 nm. In this way, the cellulose triacetate film base material which has an antireflection layer was obtained.

[Production Example 17]: Preparation of a PET film base material (B) having an antireflection layer

The coating composition for forming an antireflection layer obtained in Production Example 15 was applied to one side of a polyethylene terephthalate (hereinafter sometimes referred to as "PET") film (Lumiror U48, manufactured by Toray Corporation), and spin-coated at a rotation speed of 200 rpm for 60 seconds After homogenization, it was dried at 200°C for 30 minutes to form an antireflection layer having a film thickness of 100 nm. In this way, a polyethylene terephthalate film base material having an antireflection layer was obtained.

[Production Example 18]: Preparation of surface protection film (C)

The (meth)acrylic pressure-sensitive adhesive composition (7) obtained in Preparation Example 13 was applied to a substrate made of a polyester resin (trade name: “Lumiror S10”, thickness 38 μm, manufactured by Toray Corporation) so that the thickness after drying with a fountain roll becomes 21 μm, and , and dried by curing under conditions of a drying temperature of 130° C. and a drying time of 30 seconds. In this way, the adhesive layer was produced on the base material. Next, the silicone-treated surface of a release sheet (trade name "MRF25", 25 µm thick, manufactured by Mitsubishi Chemical Co., Ltd.) made of a polyester resin having a thickness of 25 µm on which one surface is silicone-treated is bonded to the surface of the obtained pressure-sensitive adhesive layer. Thus, a surface protection film (C) was obtained. The obtained surface protection film (C) aged at normal temperature for 7 days.

[Example 1]

Silicone-treated surface of a release sheet (trade name "MRF25", 25 µm thick, manufactured by Mitsubishi Chemical Co., Ltd.) made of a polyester resin having a thickness of 25 µm on which a (meth)acrylic pressure-sensitive adhesive composition (1) is silicone-treated on one side to a thickness of 25 µm after drying, and cured and dried under the conditions of a drying temperature of 130° C. and a drying time of 3 minutes. In this way, the pressure-sensitive adhesive layer formed of the (meth)acrylic pressure-sensitive adhesive composition (1) on the silicone-treated surface was provided. Next, the surface in which the antireflection layer of the TAC film base material (A) which has an antireflection layer is not provided with the surface of the obtained adhesive layer was bonded together, and the reinforcing film (1) was obtained. The obtained reinforcing film (1) was aged at room temperature for 7 days. The results are shown in Table 1.

[Example 2]

As shown in Table 1, except having changed the base material into the PET film base material (B) which has an antireflection layer, it carried out similarly to Example 1, and obtained the film (2) for reinforcement. The results are shown in Table 1.

[Example 3]

As shown in Table 1, except having changed the base material into the TAC film (TG60UL, the Fujifilm company make), it carried out similarly to Example 1, and obtained the film (3) for reinforcement. The results are shown in Table 1.

[Example 4]

As shown in Table 1, except having changed the base material into the PET film (Lumiror U48, Toray company make), it carried out similarly to Example 1, and obtained the film (4) for reinforcement. The results are shown in Table 1.

[Example 5]

As shown in Table 1, the same procedure as in Example 1 was carried out except that the substrate was changed to a polyimide (hereinafter, sometimes referred to as "PI") film (Neoprim S-100, manufactured by Mitsubishi Gas Chemicals). A reinforcing film (5) was obtained. The results are shown in Table 1.

[Example 6]

As shown in Table 1, except having changed the (meth)acrylic adhesive composition (1) into the (meth)acrylic adhesive composition (2), it carried out similarly to Example 1, and obtained the film (6) for reinforcement. The results are shown in Table 1.

[Example 7]

As shown in Table 1, except having changed the (meth)acrylic adhesive composition (1) into the (meth)acrylic adhesive composition (2), it carried out similarly to Example 2, and obtained the film (7) for reinforcement. The results are shown in Table 1.

[Example 8]

As shown in Table 1, except having changed the (meth)acrylic adhesive composition (1) into the (meth)acrylic adhesive composition (2), it carried out similarly to Example 3, and obtained the film (8) for reinforcement. The results are shown in Table 1.

[Example 9]

As shown in Table 1, except having changed the (meth)acrylic-type adhesive composition (1) into the (meth)acrylic-type adhesive composition (2), it carried out similarly to Example 4, and obtained the film (9) for reinforcement. The results are shown in Table 1.

[Example 10]

On the base material of the reinforcing film (1) obtained in Example 1, the surface protection film (C) obtained in manufacture example 18 was bonded together, and the reinforcing film (10) with a surface protection film was obtained. The results are shown in Table 1.

[Example 11]

On the base material of the reinforcing film (2) obtained in Example 2, the surface protection film (C) obtained in manufacture example 18 was bonded together, and the reinforcing film (11) with a surface protection film was obtained. The results are shown in Table 1.

[Example 12]

On the base material of the reinforcing film (3) obtained in Example 3, the surface protection film (C) obtained in manufacture example 18 was bonded together, and the reinforcing film (12) with a surface protection film was obtained. The results are shown in Table 1.

[Example 13]

On the base material of the reinforcing film (4) obtained in Example 4, the surface protection film (C) obtained in manufacture example 18 was bonded together, and the reinforcing film (13) with a surface protection film was obtained. The results are shown in Table 1.

[Example 14]

On the base material of the reinforcing film (5) obtained in Example 5, the surface protection film (C) obtained in manufacture example 18 was bonded together, and the reinforcing film (14) with a surface protection film was obtained. The results are shown in Table 1.

[Example 15]

On the base material of the reinforcing film (6) obtained in Example 6, the surface protection film (C) obtained in manufacture example 18 was bonded together, and the reinforcing film (15) with a surface protection film was obtained. The results are shown in Table 1.

[Example 16]

On the base material of the reinforcing film (7) obtained in Example 7, the surface protection film (C) obtained in manufacture example 18 was bonded together, and the reinforcing film (16) with a surface protection film was obtained. The results are shown in Table 1.

[Example 17]

On the base material of the reinforcing film (8) obtained in Example 8, the surface protection film (C) obtained in manufacture example 18 was bonded together, and the reinforcing film (17) with a surface protection film was obtained. The results are shown in Table 1.

[Example 18]

On the base material of the reinforcing film (9) obtained in Example 9, the surface protection film (C) obtained in manufacture example 18 was bonded together, and the reinforcing film (18) with a surface protection film was obtained. The results are shown in Table 1.

[Example 19]

As shown in Table 1, except having changed the (meth)acrylic adhesive composition (1) into the (meth)acrylic adhesive composition (7), it carried out similarly to Example 1, and obtained the film (19) for reinforcement. The results are shown in Table 1.

[Example 20]

As shown in Table 1, except having changed the (meth)acrylic adhesive composition (1) into the (meth)acrylic adhesive composition (7), it carried out similarly to Example 2, and obtained the film (20) for reinforcement. The results are shown in Table 1.

[Example 21]

As shown in Table 1, except having changed the (meth)acrylic adhesive composition (1) into the (meth)acrylic adhesive composition (7), it carried out similarly to Example 3, and obtained the film (21) for reinforcement. The results are shown in Table 1.

[Example 22]

As shown in Table 1, except having changed the (meth)acrylic adhesive composition (1) into the (meth)acrylic adhesive composition (7), it carried out similarly to Example 4, and obtained the film (22) for reinforcement. The results are shown in Table 1.

[Example 23]

As shown in Table 1, except having changed the (meth)acrylic adhesive composition (1) into the (meth)acrylic adhesive composition (7), it carried out similarly to Example 5, and obtained the film (23) for reinforcement. The results are shown in Table 1.

[Example 24]

As shown in Table 1, except having changed the (meth)acrylic adhesive composition (1) into the (meth)acrylic adhesive composition (8), it carried out similarly to Example 1, and obtained the film (24) for reinforcement. The results are shown in Table 1.

[Example 25]

As shown in Table 1, except having changed the (meth)acrylic adhesive composition (1) into the (meth)acrylic adhesive composition (8), it carried out similarly to Example 2, and obtained the film (25) for reinforcement. The results are shown in Table 1.

[Example 26]

As shown in Table 1, except having changed the (meth)acrylic-type adhesive composition (1) into the (meth)acrylic-type adhesive composition (8), it carried out similarly to Example 3, and obtained the film (26) for reinforcement. The results are shown in Table 1.

[Example 27]

As shown in Table 1, except having changed the (meth)acrylic adhesive composition (1) into the (meth)acrylic adhesive composition (8), it carried out similarly to Example 4, and obtained the film (27) for reinforcement. The results are shown in Table 1.

[Example 28]

As shown in Table 1, except having changed the (meth)acrylic adhesive composition (1) into the (meth)acrylic adhesive composition (8), it carried out similarly to Example 5, and obtained the film (28) for reinforcement. The results are shown in Table 1.

[Example 29]

On the base material of the reinforcing film (19) obtained in Example 19, the surface protection film (C) obtained in manufacture example 18 was bonded together, and the reinforcing film (29) with a surface protection film was obtained. The results are shown in Table 1.

[Example 30]

On the base material of the reinforcing film (20) obtained in Example 20, the surface protection film (C) obtained in manufacture example 18 was bonded together, and the reinforcing film (30) with a surface protection film was obtained. The results are shown in Table 1.

[Example 31]

On the base material of the reinforcing film (21) obtained in Example 21, the surface protection film (C) obtained in manufacture example 18 was bonded together, and the reinforcing film (31) with a surface protection film was obtained. The results are shown in Table 1.

[Example 32]

On the base material of the reinforcing film (22) obtained in Example 22, the surface protection film (C) obtained in manufacture example 18 was bonded together, and the reinforcing film (32) with a surface protection film was obtained. The results are shown in Table 1.

[Example 33]

On the base material of the reinforcing film (23) obtained in Example 23, the surface protection film (C) obtained in manufacture example 18 was bonded together, and the reinforcing film (33) with a surface protection film was obtained. The results are shown in Table 1.

[Example 34]

On the base material of the reinforcing film (24) obtained in Example 24, the surface protection film (C) obtained in manufacture example 18 was bonded together, and the reinforcing film (34) with a surface protection film was obtained. The results are shown in Table 1.

[Example 35]

On the base material of the reinforcing film (25) obtained in Example 25, the surface protection film (C) obtained in manufacture example 18 was bonded together, and the reinforcing film (35) with a surface protection film was obtained. The results are shown in Table 1.

[Example 36]

On the base material of the reinforcing film (26) obtained in Example 26, the surface protection film (C) obtained in manufacture example 18 was bonded together, and the reinforcing film (36) with a surface protection film was obtained. The results are shown in Table 1.

[Example 37]

On the base material of the reinforcing film (27) obtained in Example 27, the surface protection film (C) obtained in manufacture example 18 was bonded together, and the reinforcing film (37) with a surface protection film was obtained. The results are shown in Table 1.

[Example 38]

On the base material of the reinforcing film (28) obtained in Example 28, the surface protection film (C) obtained in manufacture example 18 was bonded together, and the reinforcing film (38) with a surface protection film was obtained. The results are shown in Table 1.

[Comparative Example 1]

A silicone-treated surface of a release sheet (trade name "MRF25", 25 µm thick, manufactured by Mitsubishi Chemical Co., Ltd.) made of a polyester resin having a thickness of 25 µm on which the (meth)acrylic pressure-sensitive adhesive composition (3) is silicone-treated on one surface. to a thickness of 25 µm after drying, and cured and dried under the conditions of a drying temperature of 130° C. and a drying time of 3 minutes. In this way, the pressure-sensitive adhesive layer formed of the (meth)acrylic pressure-sensitive adhesive composition (3) on the silicone-treated surface was provided. Next, the surface in which the antireflection layer of the TAC film base material (A) which has an antireflection layer is not provided with the surface of the obtained adhesive layer was bonded together, and the film for reinforcement (C1) was obtained. The obtained reinforcing film (C1) was aged at room temperature for 7 days. The results are shown in Table 2.

[Comparative Example 2]

As shown in Table 2, except having changed the base material into the PET film base material (B) which has an antireflection layer, it carried out similarly to the comparative example 1, and obtained the film (C2) for reinforcement. The results are shown in Table 2.

[Comparative Example 3]

As shown in Table 2, except having changed the base material into the TAC film (TG60UL, the Fujifilm company make), it carried out similarly to the comparative example 1, and obtained the film (C3) for reinforcement. The results are shown in Table 2.

[Comparative Example 4]

As shown in Table 2, except having changed the base material into PET film (Lumiror U48, the Toray company make), it carried out similarly to the comparative example 1, and obtained the film (C4) for reinforcement. The results are shown in Table 2.

[Comparative Example 5]

As shown in Table 2, except having changed the (meth)acrylic adhesive composition (3) into the (meth)acrylic adhesive composition (4), it carried out similarly to the comparative example 1, and obtained the film (C5) for reinforcement. The results are shown in Table 2.

[Comparative Example 6]

As shown in Table 2, except having changed the (meth)acrylic adhesive composition (3) into the (meth)acrylic adhesive composition (4), it carried out similarly to the comparative example 2, and obtained the film (C6) for reinforcement. The results are shown in Table 2.

[Comparative Example 7]

As shown in Table 2, except having changed the (meth)acrylic-type adhesive composition (3) into the (meth)acrylic-type adhesive composition (4), it carried out similarly to the comparative example 3, and obtained the film (C7) for reinforcement. The results are shown in Table 2.

[Comparative Example 8]

As shown in Table 2, except having changed the (meth)acrylic adhesive composition (3) into the (meth)acrylic adhesive composition (4), it carried out similarly to the comparative example 4, and obtained the film (C8) for reinforcement. The results are shown in Table 2.

[Comparative Example 9]

As shown in Table 2, except having changed the (meth)acrylic adhesive composition (3) into the (meth)acrylic adhesive composition (5), it carried out similarly to the comparative example 1, and obtained the film (C9) for reinforcement. The results are shown in Table 2.

[Comparative Example 10]

As shown in Table 2, except having changed the (meth)acrylic adhesive composition (3) into the (meth)acrylic adhesive composition (5), it carried out similarly to the comparative example 2, and obtained the film (C10) for reinforcement. The results are shown in Table 2.

[Comparative Example 11]

As shown in Table 2, except having changed the (meth)acrylic adhesive composition (3) into the (meth)acrylic adhesive composition (5), it carried out similarly to the comparative example 3, and obtained the film (C11) for reinforcement. The results are shown in Table 2.

[Comparative Example 12]

As shown in Table 2, except having changed the (meth)acrylic adhesive composition (3) into the (meth)acrylic adhesive composition (5), it carried out similarly to the comparative example 4, and obtained the film (C12) for reinforcement. The results are shown in Table 2.

[Comparative Example 13]

On the base material of the reinforcing film (C1) obtained in the comparative example 1, the surface protection film (C) obtained in manufacture example 15 was bonded together, and the reinforcing film (C13) with a surface protection film was obtained. The results are shown in Table 2.

[Comparative Example 14]

On the base material of the reinforcing film (C2) obtained in the comparative example 2, the surface protection film (C) obtained in manufacture example 15 was bonded together, and the reinforcing film (C14) with a surface protection film was obtained. The results are shown in Table 2.

[Comparative Example 15]

On the base material of the reinforcing film (C3) obtained in the comparative example 3, the surface protection film (C) obtained in manufacture example 15 was bonded together, and the reinforcing film (C15) with a surface protection film was obtained. The results are shown in Table 2.

[Comparative Example 16]

On the base material of the reinforcing film (C4) obtained in the comparative example 4, the surface protection film (C) obtained in manufacture example 15 was bonded together, and the reinforcing film (C16) with a surface protection film was obtained. The results are shown in Table 2.

[Comparative Example 17]

On the base material of the reinforcing film (C5) obtained in the comparative example 5, the surface protection film (C) obtained in manufacture example 15 was bonded together, and the reinforcing film (C17) with a surface protection film was obtained. The results are shown in Table 2.

[Comparative Example 18]

On the base material of the reinforcing film (C6) obtained in the comparative example 6, the surface protection film (C) obtained in manufacture example 15 was bonded together, and the reinforcing film (C18) with a surface protection film was obtained. The results are shown in Table 2.

[Comparative Example 19]

On the base material of the reinforcing film (C7) obtained in the comparative example 7, the surface protection film (C) obtained in manufacture example 15 was bonded together, and the reinforcing film (C19) with a surface protection film was obtained. The results are shown in Table 2.

[Comparative Example 20]

On the base material of the reinforcing film (C8) obtained in the comparative example 8, the surface protection film (C) obtained in manufacture example 15 was bonded together, and the reinforcing film (C20) with a surface protection film was obtained. The results are shown in Table 2.

[Comparative Example 21]

On the base material of the reinforcing film (C9) obtained in the comparative example 9, the surface protection film (C) obtained in manufacture example 15 was bonded together, and the reinforcing film (C21) with a surface protection film was obtained. The results are shown in Table 2.

[Comparative Example 22]

On the base material of the reinforcing film (C10) obtained in the comparative example 10, the surface protection film (C) obtained in manufacture example 15 was bonded together, and the reinforcing film (C22) with a surface protection film was obtained. The results are shown in Table 2.

[Comparative Example 23]

On the base material of the reinforcing film (C11) obtained in the comparative example 11, the surface protection film (C) obtained in manufacture example 15 was bonded together, and the reinforcing film (C23) with a surface protection film was obtained. The results are shown in Table 2.

[Comparative Example 24]

On the base material of the reinforcing film (C12) obtained in the comparative example 12, the surface protection film (C) obtained in manufacture example 15 was bonded together, and the reinforcing film (C24) with a surface protection film was obtained. The results are shown in Table 2.

<Industrial Applicability>

The film for reinforcement of this invention and the film for reinforcement with a surface protection film can be used typically in the field|area of an optical member and an electronic member.

1000: reinforcing film with surface protection film
100: reinforcing film
200: surface protection film
10: base layer A1
20: adhesive layer A2
30: functional layer A3
40: base layer B1
50: adhesive layer B2
60: release sheet
70: functional layer B3

Claims (9)

As a reinforcing film comprising a base layer A1 and an adhesive layer A2,
The rate of change of light reflectance at 580 nm after storing the reinforcing film for one week in an environment of 60° C. and 90% RH is 2.0% or less,
reinforcing film. The reinforcing film according to claim 1, wherein a haze change rate after storing the reinforcing film at 60°C and 90% RH for one week is 10.0% or less. The reinforcing film of Claim 1 or 2 whose total light transmittance of the said base material layer A1 is 90 % or more. The adhesive strength of the PET film in any one of Claims 1-3 after affixing the said adhesive layer A2 to a PET film and leaving it to stand at 23 degreeC for 30 minutes, 180 degree|times peeling angle, and peeling speed 300 mm/min. This 0.30N/25mm or more, the reinforcing film. The reinforcing film according to any one of claims 1 to 4, which is affixed to an adherend that is an optical member or an electronic member. An optical member with a film for reinforcement or an electronic member with a film for reinforcement provided with the film for reinforcement in any one of Claims 1-4. The reinforcing film with a surface protection film which equips the said base material layer A1 side of the reinforcing film in any one of Claims 1-4 with a surface protection film. 8. The method according to claim 7, wherein the rate of change in light reflectance at 580 nm of the reinforcing film after peeling the surface protection film after storing the reinforcing film with a surface protection film at 60°C and 90% RH for one week is The film for reinforcement with a surface protection film which is 5.0 % or less. A surface protection film comprising: exposing the pressure-sensitive adhesive layer A2 included in the reinforcing film with a surface protection film according to claim 7 or 8, affixing the pressure-sensitive adhesive layer A2 to an adherend, and then peeling the surface protection film How to use the reinforcing film.

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