TWI790418B - Adhesive sheet, method for producing adhesive sheet, method for producing intermediate laminate, and intermediate laminate - Google Patents

Abstract

The adhesive sheet 1 of the present invention includes an adhesive layer 2 and an active light absorbing layer 3 disposed on one side of the adhesive layer 2 . The adhesive layer 2 includes an adhesive composition that can reduce the transmittance of visible light at a wavelength of 550 nm by irradiation of active light. The average transmittance of active light of the active light absorbing layer 3 is 15% or less.

Description

Adhesive sheet, method for producing adhesive sheet, method for producing intermediate laminate, and intermediate laminate

The present invention relates to an adhesive sheet, a method for manufacturing the adhesive sheet, a method for manufacturing an intermediate laminate, and an intermediate laminate. Specifically, it relates to an adhesive sheet, a method for manufacturing the adhesive sheet, and a product using the adhesive sheet The manufacturing method of the obtained intermediate laminate, and the intermediate laminate obtained by the manufacturing method of the intermediate laminate.

In recent years, displays equipped with organic EL (Electroluminescence, electroluminescence) panels have been known. The organic EL panel has a highly reflective electrode layer, so it is easy to produce external light reflection or background reflection.

In addition, it is known to provide a layer having a function of absorbing light on the reflective surface of the electrode layer in order to prevent external light reflection or background reflection.

As such a layer, a light-absorbing layer containing a carbon black pigment and a dye has been proposed (for example, refer to Patent Document 1). [Prior Art Literature] [Patent Document]

[Patent Document 1] Japanese Patent Application Laid-Open No. 2017-203810

[Problem to be solved by the invention]

On the other hand, when the layer having the function of absorbing light is an adhesive layer, transparency may be required from the viewpoint of inspection or the like.

In such a case, a method of including a compound colored by an acid and a photoacid generator in an adhesive layer has been studied.

When such an adhesive layer is irradiated with active light, an acid is generated from the photoacid generator, and the compound is colored by the acid.

That is, in this adhesive layer, the function of absorbing light can be given by coloring an adhesive layer by irradiating active light at arbitrary timing.

However, in such an adhesive layer, depending on the purpose and use, there may be cases where it is desired to leave the colored part transparent, or the coloring amount may be less than that of the colored part.

In this case, if the colored part is exposed to external light (active light), the part to be left transparently will be colored, and the coloring amount of the part that is intended to be less than the colored part will be increased. Condition.

The present invention provides an adhesive sheet capable of coloring an adhesive layer by irradiating active light rays at any point in time and suppressing coloring by external light (active light rays) other than the colored portion, a method for producing the adhesive sheet, and using the adhesive sheet The manufacturing method of the obtained intermediate laminate, and the intermediate laminate obtained by the manufacturing method of the intermediate laminate. [Technical means to solve the problem]

The present invention [1] is an adhesive sheet comprising an adhesive layer and an active light absorbing layer arranged on one side of the adhesive layer,

The above-mentioned adhesive layer includes an adhesive composition that can reduce the transmittance of visible light at a wavelength of 550 nm by irradiation of active light, and the average transmittance of active light of the above-mentioned active light absorbing layer is 15% or less.

The present invention [2] includes the adhesive sheet as described in the above [1], wherein the above-mentioned adhesive layer comprises an adhesive composition that can reduce the visible light transmittance at a wavelength of 550 nm by irradiation of ultraviolet rays, and the above-mentioned active light absorbing layer is An ultraviolet absorbing layer, and the average transmittance of the above ultraviolet absorbing layer at a wavelength of 300 nm to 400 nm is 15% or less.

The present invention [3] includes the adhesive sheet described in the above [2], wherein the ultraviolet absorbing layer has an average transmittance of 50% or more at a wavelength of not less than 400 nm and not more than 700 nm.

The present invention [4] includes the adhesive sheet according to the above [2] or [3], wherein the ultraviolet absorbing layer contains an ultraviolet absorber.

The present invention [5] includes the adhesive sheet described in any one of the above-mentioned [1] to [4], wherein the above-mentioned adhesive composition comprises an adhesive polymer as a polymer of a monomer component, an adhesive polymer colored by an acid compounds, and photoacid generators.

The present invention [6] includes a method for producing an adhesive sheet, which includes the following steps: an adhesive layer preparation step, which is to prepare an adhesive composition that can reduce the transmittance of visible light at a wavelength of 550 nm by irradiation of active light an adhesive layer; and an arranging step, which is to arrange an active ray absorbing layer with an average transmittance of active light of 15% or less on one side of the above-mentioned adhesive layer.

The present invention [7] includes the method for producing an adhesive sheet according to the above [6], wherein the adhesive layer is irradiated with active light rays after the step of preparing the adhesive layer and before the step of arranging the aforementioned adhesive layer.

The present invention [8] includes the production method of the adhesive sheet described in the above [6], characterized in that the actinic light is irradiated after the arranging step.

The present invention [9] includes a method of manufacturing an intermediate laminate, which includes the following steps: a preparation step of preparing an adhesive sheet manufactured by the method of manufacturing an adhesive sheet as described in the above [8]; an irradiation step, It is to irradiate the above-mentioned adhesive layer with active light to form a high-irradiated part with a relatively high dose of active light on the above-mentioned adhesive layer, and a non-irradiated/low-irradiated part with a relatively low dose of active light or not irradiated with active light , so that the visible light transmittance of the above-mentioned highly irradiated part at a wavelength of 550 nm is smaller than the visible light transmittance of the above-mentioned non-irradiated/low-irradiated part at a wavelength of 550 nm; and a bonding step, which is to attach the other side of the above-mentioned adhesive sheet Attached to the adherend.

The present invention [10] includes the manufacturing method of the intermediate laminate described in the above [9], wherein the irradiation step is carried out after the preparation step, and the bonding step is carried out after the irradiation step.

The present invention [11] includes the manufacturing method of the intermediate laminate described in the above [9], wherein the bonding step is carried out after the preparation step, and the irradiation step is carried out after the bonding step.

The present invention [12] includes the method for producing an intermediate laminate according to the above [10], wherein in the irradiating step, the adhesive layer is irradiated with active light from the surface side of the active light absorbing layer.

The present invention [13] includes the method for producing an intermediate laminate described in the above [11], wherein in the irradiation step, the adhesive layer is irradiated with active light from the surface side of the active light absorbing layer.

The present invention [14] includes the method for producing an intermediate laminate according to the above [10], wherein in the irradiation step, the adhesive layer is irradiated with active light from the surface side of the adhesive layer.

The present invention [15] includes the method for producing an intermediate laminate according to the above [11], wherein in the irradiation step, the adhesive layer is irradiated with active light from the surface side of the adherend.

The present invention [16] includes the method for producing an intermediate laminate as described in the above [15], wherein the average transmittance of the active light rays of the above-mentioned adherend is 60% or more, and in the above-mentioned irradiation step, in the above-mentioned adherend A part of the other side of the side is equipped with a mask for blocking active light, and then the above-mentioned adhesive layer is irradiated with active light.

The present invention [17] includes the manufacturing method of the intermediate laminate described in the above [15], wherein the above-mentioned adherend blocks active light rays, and in the above-mentioned bonding step, the above-mentioned adherend is arranged on the above-mentioned adhesive sheet part of the other side.

The present invention [18] includes the method for producing an intermediate laminate as described in any one of the above [9] to [17], wherein the above-mentioned unirradiated/low-irradiated portion is an unirradiated portion that is not irradiated with active light, and the above-mentioned unirradiated The visible light transmittance of the irradiated part at a wavelength of 550 nm is above 80%.

The present invention [19] includes the method for producing an intermediate laminate as described in any one of the above [9] to [16], wherein the above-mentioned non-irradiated/low-irradiated portion is a low-irradiated portion with a low amount of active light rays, and the above-mentioned irradiated The steps include: a first irradiating step, which is to irradiate the above-mentioned adhesive layer with active light after arranging a first mask that blocks active light, and form a first irradiated portion irradiated with active light on the above-mentioned adhesive layer, and a non-irradiated portion. to the part not irradiated with active light; and the second irradiation step, which is to irradiate the part not irradiated with active light in the above-mentioned adhesive layer after the second mask for blocking active light is arranged in the first irradiated part , so that the previously unirradiated portion is formed as a second irradiated portion; and any one of the first irradiated portion and the second irradiated portion is the above-mentioned high-irradiated portion, and the other is the aforementioned low-irradiated portion.

The present invention [20] includes the method for producing an intermediate laminate as described in any one of the above [9] to [16], wherein the above-mentioned non-irradiated/low-irradiated portion is a low-irradiated portion with a low irradiation amount of active light, and the above-mentioned irradiated The steps include: a third irradiating step of irradiating the entirety of the above-mentioned adhesive layer with active light to form the entirety of the above-mentioned adhesive layer as a third irradiated portion irradiated with active light; and a fourth irradiating step of Since the active light is irradiated to the remaining part of the third irradiating part after a mask for blocking active light is arranged on a part of the third irradiating part, the remaining part of the third irradiating part is formed into a fourth irradiating part; and The 3rd irradiation part is the said low irradiation part, and the said 4th irradiation part is the said high irradiation part.

The present invention [21] includes the manufacturing method of the intermediate laminate described in the above [19], wherein the visible light transmittance at the wavelength of 550 nm of the above-mentioned high-irradiation part is less than 20%, and the transmittance of visible light at the wavelength of 550 nm of the above-mentioned low-irradiation part is The visible light transmittance is not less than 20% and not more than 70%.

The present invention [22] is an intermediate laminate comprising: an adhesive sheet having an adhesive layer and an active light absorbing layer disposed on one side of the adhesive layer; and an adherend disposed on the adhesive sheet On the other hand, the above-mentioned adhesive layer has a high light transmittance part with a relatively large visible light transmittance at a wavelength of 550 nm, and a low light transmittance part with a relatively small visible light transmittance at a wavelength of 550 nm, and the above-mentioned active light absorbing layer The average transmittance of active light is below 15%.

The present invention [23] includes the intermediate laminate described in the above [22], wherein the low light transmittance portion has a pattern shape.

The present invention [24] includes the intermediate laminate described in the above [22] or [23], wherein the visible light transmittance at a wavelength of 550 nm of the above-mentioned high light transmittance portion is 80% or more.

The present invention [25] includes the intermediate laminate as described in the above [22] or [23], wherein the visible light transmittance at a wavelength of 550 nm of the above-mentioned low light transmittance part is less than 20%, and the wavelength of the above-mentioned high light transmittance part is Visible light transmittance at 550 nm is not less than 20% and not more than 70%. [Effect of Invention]

In the adhesive sheet of the present invention, the adhesive layer includes an adhesive composition that can reduce the transmittance of visible light at a wavelength of 550 nm by irradiation of active light.

Therefore, the adhesive layer can be colored by irradiating active light at an arbitrary point of time, thereby imparting a light-absorbing function.

In addition, in the adhesive sheet, the average transmittance of the active ray of the active ray absorbing layer is 15% or less.

Therefore, when it is desired to leave transparently other than the colored portion in the adhesive layer, or to make the amount of coloring less than that of the colored portion, it is possible to suppress coloring by external light (active light) other than the colored portion.

The manufacturing method of the adhesive sheet of the present invention includes the step of disposing an active light absorbing layer on one side of the adhesive layer.

Therefore, when it is desired to leave transparently other than the colored portion in the adhesive layer, or to make the amount of coloring less than that of the colored portion, it is possible to suppress coloring by external light (active light) other than the colored portion.

The manufacturing method of the intermediate laminate of the present invention includes a preparatory step of preparing the adhesive sheet of the present invention.

Therefore, the intermediate laminate obtained by the method for producing the intermediate laminate can suppress coloring by external light (acting light) other than the colored portion (non-irradiated/low-irradiated portion).

In the intermediate laminate of the present invention, the average transmittance of the active ray in the active ray absorbing layer is 15% or less.

Therefore, coloring by external light (active light rays) other than the colored portion (low light transmittance portion) can be suppressed.

1. Adhesive sheet As shown in FIG. 1 , the adhesive sheet 1 has a film shape (including a sheet shape) with a specific thickness, extends in a direction (surface direction) perpendicular to the thickness direction, and has a flat upper surface and a flat lower surface. .

Specifically, the adhesive sheet 1 includes an adhesive layer 2 and an active ray absorbing layer 3 disposed on one surface of the adhesive layer 2 .

Each layer constituting the adhesive sheet 1 will be described below.

1-1. Adhesive layer The adhesive layer 2 is the upper layer of the adhesive sheet 1 .

The adhesive layer 2 is a pressure-sensitive adhesive layer for bonding the adhesive sheet 1 to the adherend 4 (described below).

The adhesive layer 2 has a film shape extending in the surface direction, and has a flat plane and a flat lower surface.

The adhesive layer 2 includes an adhesive composition that can reduce the transmittance of visible light at a wavelength of 550 nm by irradiation of active light.

Therefore, the adhesive layer 2 can be colored by irradiating the adhesive layer 2 with active light rays at any point of time, whereby the function of absorbing light can be imparted.

Examples of the active light rays include ultraviolet rays, visible light, infrared rays, X-rays, α rays, β rays, and γ rays, and preferred examples include ultraviolet rays from the viewpoint of diversity of equipment used and ease of handling.

In addition, ultraviolet rays mean electromagnetic waves in a wavelength range of not less than 1 nm and not more than 400 nm.

That is, the adhesive layer 2 contains an adhesive composition that can reduce the visible light transmittance at a wavelength of 550 nm by irradiation of ultraviolet rays.

Furthermore, the type of active light that can reduce the visible light transmittance of the adhesive composition at a wavelength of 550 nm is determined by the following types of photoacid generators (specifically, the wavelength of active light that generates acid from the photoacid generator) )Decide.

The adhesive composition includes an adhesive polymer, a compound colored by an acid, and a photoacid generator.

If the adhesive composition includes an adhesive polymer, a compound colored by an acid, and a photoacid generator, the radiation of the adhesive layer 2 at a wavelength of 550 nm can be reliably irradiated by active light rays (preferably ultraviolet rays). Visible light transmittance decreases.

Adhesive polymers are formulated to impart adhesive properties.

Adhesive polymer-based monomer components (described below) polymers, such as acrylic polymers, polysiloxane-based polymers, urethane-based polymers, rubber-based polymers, etc., optical transparency , adhesiveness, and control of storage modulus, preferably acrylic polymers may be mentioned.

The acrylic polymer is obtained by polymerization of a monomer component containing an alkyl (meth)acrylate as a main component.

Alkyl (meth)acrylate acrylates and/or methacrylates, for example, methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, (meth)acrylate Butyl acrylate, isopropyl (meth)acrylate, butyl (meth)acrylate, isobutyl (meth)acrylate, second butyl (meth)acrylate, third butyl (meth)acrylate, Amyl (meth)acrylate, Isoamyl (meth)acrylate, Neopentyl (meth)acrylate, Hexyl (meth)acrylate, Heptyl (meth)acrylate, 2-ethyl (meth)acrylate Hexyl (meth)acrylate, octyl (meth)acrylate, isooctyl (meth)acrylate, nonyl (meth)acrylate, isononyl (meth)acrylate, decyl (meth)acrylate, (meth) Isodecyl Acrylate, Undecyl (Meth)acrylate, Lauryl (Meth)acrylate, Isotridodecyl (Meth)acrylate, Tetradecyl (Meth)acrylate ester, isotetradecyl (meth)acrylate, pentadecyl (meth)acrylate, cetyl (meth)acrylate, heptadecyl (meth)acrylate, (meth)acrylate ) octadecyl acrylate, isostearyl (meth)acrylate, nonadecyl (meth)acrylate, eicosyl (meth)acrylate and other linear or branched C1-20 alkyl (meth)acrylate, etc., Preferably, C4-12 alkyl (meth)acrylate is mentioned, More preferably, butyl acrylate is mentioned.

Alkyl (meth)acrylate can be used individually or in combination of 2 or more types.

The blending ratio of the alkyl (meth)acrylate is, for example, 50 mass % or more, preferably 60 mass % or more, and, for example, 99 mass % or less with respect to the monomer component.

Moreover, it is preferable that a monomer component contains the acidic vinyl monomer which has an anionic group.

When the monomer component contains an acidic vinyl monomer having an anionic group, strong acid generated from a photoacid generator (described below) promotes departure, the color tone becomes stronger, and the coloring stability is excellent.

As an acidic vinyl monomer which has an anionic group, a carboxyl group-containing vinyl monomer, a sulfo group-containing vinyl monomer, a phosphoric acid group-containing vinyl monomer, etc. are mentioned, for example.

Examples of carboxyl group-containing vinyl monomers include (meth)acrylic acid, 2-carboxyethyl (meth)acrylate, carboxypentyl (meth)acrylate carboxypentyl, itaconic acid, maleic acid, Malic acid, crotonic acid, etc.

Moreover, as a carboxyl group containing vinyl monomer, acid anhydride group containing monomers, such as maleic anhydride and itaconic anhydride, are also mentioned, for example.

Examples of the sulfovinyl group-containing monomer include styrenesulfonic acid, allylsulfonic acid, and the like.

As a phosphoric acid group-containing vinyl monomer, 2-hydroxyethyl acryloyl phosphate etc. are mentioned, for example.

As an acidic vinyl monomer which has an anionic group, Preferably, a carboxyl group-containing vinyl monomer is mentioned, More preferably, (meth)acrylic acid is mentioned, Still more preferably, acrylic acid is mentioned.

The acidic vinyl monomers having an anionic group can be used alone or in combination of two or more.

The blending ratio of the acidic vinyl monomer having an anionic group is, for example, 3 parts by mass or more and, for example, 10 parts by mass or less with respect to 100 parts by mass of the alkyl (meth)acrylate, and, with respect to the monomer The component is, for example, 1 mass % or more, and, for example, 8 mass % or less.

Also, the monomer component preferably does not substantially contain a basic vinyl monomer having a lone electron pair that can be copolymerized with an alkyl (meth)acrylate.

Specifically, the compounding ratio of the basic vinyl monomer having a lone electron pair is, for example, 3% by mass or less, preferably 1% by mass or less, and more preferably 0.5% by mass or less, based on the monomer component. More preferably, it is 0 mass % or less. In other words, it is especially preferable that the monomer component does not contain a basic vinyl monomer having a lone electron pair.

If the monomer components do not substantially contain a basic vinyl monomer having a lone electron pair, the dissolution of each monomer component can be suppressed, and the coloring stability can be improved.

The basic vinyl monomer having a lone electron pair is a heterocyclic basic vinyl monomer having nitrogen in the heterocyclic ring, for example, N-vinylpyrrolidone, methylvinylpyrrolidone, Vinylpyridine, vinylpiperidone, vinylpyrimidine, vinylpiperone, vinylpyrrole, vinylpyrrole, vinylimidazole, vinylpyrazole, vinylpyridine, N-acrylylpyrroline, N-vinylcaprolactam, etc.

In addition, the monomer component optionally includes a functional group-containing vinyl monomer (the above-mentioned acidic vinyl monomer having an anionic group and a basic vinyl monomer having a lone electron pair) capable of copolymerizing with an alkyl (meth)acrylate. body except).

Examples of functional group-containing vinyl monomers include hydroxyl-containing vinyl monomers, cyano-containing vinyl monomers, glycidyl-containing vinyl monomers, aromatic vinyl monomers, vinyl ester monomers, and vinyl ethers. Monomer etc.

Examples of hydroxyl-containing vinyl monomers include: 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, (meth)acrylic acid 6-Hydroxyhexyl, 8-Hydroxyoctyl (meth)acrylate, 10-Hydroxydecyl (meth)acrylate, 12-Hydroxylauryl (meth)acrylate, 4-(Hydroxymethyl)acrylate ) cyclohexyl methyl ester, etc., Preferably, 2-hydroxyethyl (meth)acrylate is mentioned, More preferably, 2-hydroxyethyl acrylate is mentioned.

As a cyano vinyl group containing monomer, (meth)acrylonitrile etc. are mentioned, for example.

As a glycidyl group containing vinyl monomer, glycidyl (meth)acrylate etc. are mentioned, for example.

As an aromatic vinyl monomer, styrene, p-methylstyrene, o-methylstyrene, (alpha)-methylstyrene, etc. are mentioned, for example.

As a vinyl ester monomer, ethyl acetate, vinyl propionate, etc. are mentioned, for example.

As a vinyl ether monomer, methyl vinyl ether etc. are mentioned, for example.

A functional group-containing vinyl monomer can be used individually or in combination of 2 or more types. When preparing a crosslinking agent (described below), preferably a hydroxyl group-containing vinyl monomer is used from the viewpoint of introducing a crosslinked structure into a polymer.

The blending ratio of the functional group-containing vinyl monomer is, for example, 3 parts by mass or more, preferably 5 parts by mass or more, more preferably 15 parts by mass or more, with respect to 100 parts by mass of the alkyl (meth)acrylate. , For example, it is 20 mass parts or less, and, relative to the monomer component, For example, it is 4 mass % or more, Preferably it is 10 mass % or more, Also, for example, it is 30 mass % or less, Preferably it is 20 mass % or less.

In addition, the acrylic polymer is a polymer obtained by polymerizing the above-mentioned monomer components.

When polymerizing the monomer components, for example, formulating an alkyl (meth)acrylate, and optionally an anionic group-containing acidic vinyl monomer and a functional group-containing vinyl monomer to prepare the monomer component, for example, by Acrylic polymers can be prepared by known polymerization methods such as solution polymerization, bulk polymerization, and emulsion polymerization.

As a polymerization method, preferably, solution polymerization is mentioned.

In solution polymerization, for example, a monomer component and a polymerization initiator are prepared in a known organic solvent to prepare a monomer solution, and then the monomer solution is heated.

As a polymerization initiator, a peroxide-type polymerization initiator, an azo-type polymerization initiator, etc. are mentioned, for example.

Examples of peroxide-based polymerization initiators include peroxycarbonates, ketone peroxides, peroxyketals, hydroperoxides, dialkyl peroxides, diacyl peroxides, peroxyesters, etc. Organic peroxides.

Examples of the azo polymerization initiator include 2,2'-azobisisobutyronitrile, 2,2'-azobis(2-methylbutyronitrile), 2,2'-azobis( 2,4-dimethylvaleronitrile), 2,2'-dimethyl azobisisobutyrate and other azo compounds.

As a polymerization initiator, an azo-type polymerization initiator is preferable, and 2,2'- azobisisobutyronitrile is more preferable.

A polymerization initiator can be used individually or in combination of 2 or more types.

The compounding ratio of a polymerization initiator is, for example, 0.05 mass part or more, Preferably it is 0.1 mass part or more, For example, it is 1 mass part or less, Preferably it is 0.5 mass part or less with respect to 100 mass parts of monomer components.

The heating temperature is, for example, 50° C. to 80° C., and the heating time is, for example, 1 hour to 8 hours.

Thereby, monomer components are polymerized to obtain an acrylic polymer solution containing an acrylic polymer.

The solid content concentration of the acrylic polymer solution is, for example, 20 mass % or more, and, for example, 80 mass % or less.

The weight average molecular weight of the acrylic polymer is, for example, 100,000 or more, preferably 300,000 or more, more preferably 500,000 or more, and for example, 5,000,000 or less, preferably 3,000,000 or less, more preferably 2,000,000 or less.

In addition, the said weight average molecular weight is the value calculated by polystyrene conversion measured by GPC (gel permeation chromatography).

The glass transition temperature of the adhesive polymer is, for example, 0°C or lower, preferably -20°C or lower, and usually -70°C or higher.

When the glass transition temperature of an adhesive polymer is below the said upper limit, it will be excellent in step followability.

Furthermore, the glass transition temperature is obtained by calculation according to the formula of FOX.

The compound colored by acid is a compound that changes from colorless (transparent) to colored by acid, for example, leuco pigments such as p,p',p''-tri-dimethylaminotriphenylmethane, etc. Triarylmethane dyes, such as diphenylmethane dyes such as 4,4-bis-dimethylaminophenylbenzhydryl benzyl ether, such as 3-diethylamino-6-methyl-7-chlorofluorescent Fluorescent yellow matrix pigments such as yellow matrix, spiropyran pigments such as 3-methylspirobinaphthopyran, rose bengal pigments such as rose bengal-B-anilinolactam, etc., preferably for example For example, leucochromatic pigments.

The compounds colored by acid may be used alone or in combination of two or more.

The compounding ratio of the compound colored by an acid is 0.5 mass parts or more, for example, 5 mass parts or less, preferably 2 mass parts or less with respect to 100 mass parts of adhesive polymers.

A photoacid generator is a compound that generates acid upon irradiation with active light.

Among such photoacid generators, an onium compound etc. are mentioned as a compound (ultraviolet acid generator) which generate|occur|produces an acid by irradiation of an ultraviolet-ray.

Examples of onium compounds include onium cations such as iodonium and permedium, and Cl ^- , Br ^- , I ^- , ZnCl ₃ - , HSO ₃ ^- , BF ₄ ^- , PF ₆ ^{- ,} AsF ₆ ^- , SbF ₆ ^- , CH ₃ SO ₃ ^- , CF ₃ SO ₃ ^- , (C ₆ F ₅ ) ₄ B ^- , (C ₄ H ₉ ) ₄ B ^- and other anion salts, etc.

As such an onium compound, a salt containing caldium (onium cation) and (C ₆ F ₅ ) ₄ B ⁻ (anion) is preferably mentioned.

Moreover, a commercial item _can also be used as an ultraviolet acid generator, For example, CPI-310B (salt containing calcite and ( _C6F5 ) _4B- ^, manufactured by San-Apro Corporation) etc. are mentioned.

A photoacid generator can be used individually or in combination of 2 or more types.

The compounding ratio of a photoacid generator is, for example, 1 mass part or more with respect to 100 mass parts of adhesive polymers, For example, it is 20 mass parts or less, Preferably it is 15 mass parts or less.

And, the adhesive composition is prepared by preparing an adhesive polymer (a polymer solution in the case of preparing an adhesive polymer by solution polymerization), a compound colored by an acid, and a photoacid generator in the above ratio And mix the prepared one (in the case of using a polymer solution as the adhesive polymer, it is prepared as a solution of the adhesive composition).

From the viewpoint of introducing a crosslinked structure into the adhesive polymer, it is preferable to mix a crosslinking agent in the adhesive composition.

Examples of the crosslinking agent include isocyanate crosslinking agents, epoxy crosslinking agents, azoline crosslinking agents, aziridine crosslinking agents, carbodiimide crosslinking agents, metal chelate Compound cross-linking agent, etc.

Examples of isocyanate-based crosslinking agents include aliphatic diisocyanates such as butylene diisocyanate and hexamethylene diisocyanate; esters such as cyclopentyl diisocyanate, cyclohexylene diisocyanate, and isophorone diisocyanate; Cyclic diisocyanates; for example, aromatic diisocyanates such as 2,4-methylene diisocyanate, 4,4'-diphenylmethane diisocyanate, and xylylene diisocyanate.

Moreover, as an isocyanate type crosslinking agent, the derivative|guide_body of the said isocyanate (for example, an isocyanurate modified body, a polyol modified body, etc.) is mentioned.

Commercially available products can also be used as the isocyanate-based crosslinking agent, for example, Coronate L (trimethylolpropane adduct of methylene diisocyanate, manufactured by Tosoh), Coronate HL (hexamethylene diisocyanate Trimethylolpropane adduct, manufactured by Tosoh), Coronate HX (isocyanurate body of hexamethylene diisocyanate, manufactured by Tosoh), Takenate D110N (trimethylolpropane of xylylene diisocyanate adducts, manufactured by Mitsui Chemicals), etc.

As the isocyanate-based crosslinking agent, preferably, a trimethylolpropane adduct of hexamethylene diisocyanate and a trimethylolpropane adduct of xylylene diisocyanate are mentioned.

Examples of the epoxy-based crosslinking agent include diglycidylaniline, 1,3-bis(N,N-diglycidylaminomethyl)cyclohexane, and the like.

As an epoxy-type crosslinking agent, you may use a commercial item, For example, Tetrad C (made by Mitsubishi Gas Chemical) etc. are mentioned.

As an epoxy-type crosslinking agent, Preferably, 1, 3- bis (N, N- diglycidylaminomethyl) cyclohexane is mentioned.

As a crosslinking agent, Preferably, an isocyanate type crosslinking agent and an epoxy type crosslinking agent are mentioned, More preferably, an epoxy type crosslinking agent is mentioned.

A crosslinking agent can be used individually or in combination of 2 or more types.

When a crosslinking agent is added to the adhesive composition, functional groups such as hydroxyl groups in the polymer react with the crosslinking agent to introduce a crosslinking structure into the polymer.

The blending ratio of the crosslinking agent is, for example, 0.01 mass parts or more, preferably 0.1 mass parts or more, and for example, 10 mass parts or less, preferably 5 mass parts or less, with respect to 100 mass parts of the adhesive polymer. It is preferably at most 4 parts by mass, more preferably at most 3 parts by mass, and particularly preferably at most 1 part by mass.

Moreover, when preparing a crosslinking agent to an adhesive composition, you may prepare a crosslinking catalyst in order to accelerate a crosslinking reaction.

Examples of the crosslinking catalyst include metal-based crosslinking catalysts such as tetra-n-butyl titanate, tetraisopropyl titanate, iron acetylacetonate, butyltin oxide, and dioctyltin dilaurate.

A crosslinking catalyst can be used individually or in combination of 2 or more types.

The compounding ratio of a crosslinking catalyst is 0.001 mass part or more with respect to 100 mass parts of adhesive polymers, Preferably it is 0.01 mass part or more, For example, it is 0.05 mass part or less.

In addition, the adhesive composition may contain, for example, a silane coupling agent, an adhesiveness imparting agent, a plasticizer, a softener, an anti-deterioration agent, a filler, a colorant, a surface active agent, etc., within a range that does not impair the effects of the present invention. Various additives such as additives such as antistatic agents, antistatic agents, ultraviolet absorbers, antioxidants, etc., from the viewpoint of stabilization under fluorescent lamps or natural light.

An adhesive composition (a solution of the adhesive composition in the case of using a polymer solution as the adhesive polymer) is thereby obtained.

The shear storage modulus G' at 20°C to 50°C of the adhesive composition (solid content) is, for example, 1.0×10 ⁴ Pa or more, preferably 2.0×10 ⁴ Pa or more, more preferably 4.0×10 ⁴ Pa or more, and, for example, 1.0×10 ⁶ Pa or less, preferably 5.0×10 ⁵ Pa or less.

When the said shear storage modulus G' is in the said range, it is excellent in adhesiveness, and when the shear storage modulus G' is lower, it is also excellent in step followability.

Furthermore, the above-mentioned shear storage modulus G' is measured by dynamic viscoelasticity measurement under the conditions of a frequency of 1 Hz, a heating rate of 5°C/min, and a temperature range of -70°C to 250°C.

And the adhesive layer 2 was formed from the adhesive composition by the following method.

Since the adhesive layer 2 contains the adhesive composition, an acid is generated from the photoacid generator by irradiating active light rays (preferably ultraviolet rays), and the compound colored by the acid is colored by the acid, whereby the adhesive layer 2 becomes colorless. (transparent) becomes colored. That is, the adhesive layer 2 is colorless (transparent) before the irradiation of active light rays (preferably ultraviolet rays).

Also, colorless (transparent) means that the average transmittance at a wavelength of 400 nm to 700 nm is, for example, 60% or more, preferably 70% or more, more preferably 90% or more, and, for example, 100% or less.

Also, colored means that the average transmittance at a wavelength of 400 nm to 700 nm is, for example, 0% or more, and, for example, less than 60%, preferably 50% or less.

The thickness of the adhesive layer 2 is, for example, 3 μm or more, preferably 10 μm or more, and, for example, 50 μm or less, preferably 30 μm or less.

1-2. Active light absorbing layer The active light absorbing layer 3 is disposed on the entire surface of the adhesive layer 2 , and the active light absorbing layer 3 is the lower layer of the adhesive sheet 1 .

The active ray absorbing layer 3 has a film shape extending in the plane direction, and has a flat plane and a flat lower surface.

The actinic ray absorbing layer 3 has actinic ray absorbing properties.

Specifically, the average transmittance of the active light of the active light absorbing layer 3 is 15% or less, preferably 10% or less, more preferably 9% or less, further preferably 8% or less, especially preferably 7% or less, Most preferably, it is 3% or less, and further, it is 1% or less.

If the above-mentioned average transmittance is not more than the above-mentioned upper limit, when it is desired to leave the colored portion in the adhesive layer 2 transparently, or when it is desired to make the amount of coloring less than that of the colored portion, it is possible to suppress the transmission of light from the outside outside the colored portion. Light (ultraviolet) coloring.

On the other hand, when the average transmittance exceeds the above upper limit, coloring by external light (active light rays) other than the colored portion cannot be suppressed.

Furthermore, the method for measuring the average transmittance is described in detail in the following examples.

Also, the active ray absorbing layer 3 preferably has ultraviolet absorptivity.

That is, the active ray absorbing layer 3 is preferably an ultraviolet absorbing layer.

If the active ray absorbing layer 3 is an ultraviolet absorbing layer, there is an advantage of controlling reflection or having a wide selection of materials that can be used.

As an ultraviolet absorbing layer, the resin film which contained the ultraviolet absorber, the adhesive tape which contained the ultraviolet absorber, etc. are mentioned, for example. That is, such an ultraviolet absorbing layer contains an ultraviolet absorber. When the ultraviolet absorbing layer contains an ultraviolet absorber, the average transmittance of the ultraviolet absorbing layer at a wavelength of not less than 300 nm and not more than 400 nm can be reliably reduced.

The material constituting the resin film is a material that does not have ultraviolet absorption unless an ultraviolet absorber is blended, and examples include cellulose resins such as cellulose triacetate (TAC), cyclic polyolefin resins such as cycloolefin polymers, and acrylic acid resins. Resins, phenylmaleimide resins, polycarbonate resins, polyester resins, polyamide resins, polystyrene resins, etc., preferably cellulose resins, more preferably cellulose triacetate (TAC).

These materials can be used individually or in combination of 2 or more types.

Examples of the ultraviolet absorber include: benzotriazole-based compounds, hydroxyphenyltrizoline-based compounds, benzophenone-based compounds, salicylate-based compounds, cyanoacrylate-based compounds, nickel zirconium-based compounds wait.

The ultraviolet absorber may be used alone or in combination of two or more.

A commercial item can also be used as a resin film which mix|blended the ultraviolet absorber, For example, KC2UA (TAC film, the Konica Minolta company make) etc. are mentioned.

Moreover, a commercial item can also be used as the adhesive tape which mix|blended the ultraviolet absorber, For example, CS9934U (made by Nitto Denko Co., Ltd.) etc. are mentioned.

Moreover, as an ultraviolet absorbing layer, the film formed of the material which has ultraviolet absorbing property even without compounding an ultraviolet absorber, for example, a polyimide film etc. is mentioned.

As a polyimide film, you may use a commercial item, For example, Kapton 200H (made by TORAY-DUPONT company) etc. are mentioned.

The average transmittance of the ultraviolet absorbing layer at a wavelength of 300 nm to 400 nm is, for example, 15% or less, preferably 10% or less, more preferably 9% or less, further preferably 8% or less, especially preferably 7% or less , preferably less than 3%, and further less than 1%.

If the above-mentioned average transmittance is not more than the above-mentioned upper limit, when it is desired to leave the colored portion in the adhesive layer 2 transparently, or when it is desired to make the amount of coloring less than that of the colored portion, it is possible to suppress the transmission of light from the outside outside the colored portion. Light (ultraviolet) coloring.

In addition, the average transmittance of the ultraviolet absorbing layer with a wavelength of 400 nm or more and 700 nm or less is, for example, 40% or more, preferably 50% or more, more preferably 70% or more, further preferably 80% or more, especially preferably 85% or more. More than 90%, the best is more than 90%.

When the said average transmittance is more than the said minimum, the transparency of an ultraviolet absorbing layer will be excellent.

Therefore, the adhesive sheet 1 can be preferably used for an optical device and its constituent parts that require transparency.

The thickness of the active light absorbing layer 3 is such that the above-mentioned average transmittance can be obtained, for example, it is 10 μm or more, preferably 20 μm or more, and, for example, it is 200 μm or less, preferably 120 μm or less, more preferably 50 μm the following.

The active ray absorbing layer 3 may be one layer or a plurality of layers.

When the active ray absorbing layer 3 is a plurality of layers, a plurality of active ray absorbing layers 3 of the same type or different types are laminated so that the above-mentioned average transmittance and the above-mentioned thickness are in the above-mentioned range.

In addition, surface treatment (for example, hard coating treatment) may be performed on the active ray absorbing layer 3 as needed.

1-3. Manufacturing method of adhesive sheet Next, a method of manufacturing the adhesive sheet 1 will be described with reference to FIG. 2 .

The manufacturing method of the adhesive sheet 1 includes the following steps: an adhesive layer preparation step, which is to prepare the adhesive layer 2 ; and a configuration step, which is to arrange the active light absorption layer 3 on one side of the adhesive layer 2 .

In the adhesive layer preparation step, as shown in FIG. 2A , an adhesive layer 2 is prepared.

When preparing the adhesive layer 2, the peeling film 5 is prepared first.

Examples of the release film 5 include flexible plastic films such as polyethylene, polypropylene, polyethylene terephthalate, and polyester films.

The thickness of the release film 5 is, for example, 3 μm or more, preferably 10 μm or more, and for example, 200 μm or less, preferably 100 μm or less, more preferably 50 μm or less.

Preferably, the release film 5 is subjected to release treatment using a silicone-based, fluorine-based, long-chain alkyl-based, or aliphatic amide-based release agent, or release treatment using silica powder.

Next, the above-mentioned adhesive composition (solution of the adhesive composition) is applied on one surface of the release film 5, and the solvent is dried and removed as necessary.

Examples of coating methods for the adhesive composition include roll coating, touch roll coating, gravure coating, reverse coating, roll brushing, spray coating, dip roll coating, rod coating, doctor blade, etc. Coating, air knife coating, curtain coating, lip coating, die coating, etc.

As drying conditions, the drying temperature is, for example, 50°C or higher, preferably 70°C or higher, more preferably 100°C or higher, and for example, 200°C or lower, preferably 180°C or lower, more preferably 150°C or lower. For example, it is 5 seconds or more, preferably 10 seconds or more, and, for example, 20 minutes or less, preferably 15 minutes or less, more preferably 10 minutes or less.

Thereby, the adhesive layer 2 is arrange|positioned (prepared) on one surface of the peeling film 5.

Furthermore, when the adhesive composition contains a crosslinking agent, it is preferably carried out by aging while drying and removing, or after drying of the solvent (if necessary, after the peeling film 5 is layered on one surface of the adhesive layer 2). crosslinking.

Aging conditions are appropriately set according to the type of cross-linking agent. The aging temperature is, for example, 20°C or higher, for example, 160°C or lower, preferably 50°C or lower, and the aging time is 1 minute or more, preferably 12 hours or more , more preferably 1 day or more, and, for example, 7 days or less.

In the disposing step, as shown in FIG. 2B , an active light absorbing layer 3 is disposed on one side of the adhesive layer 2 .

Thereafter, the release film 5 is peeled off as necessary.

Thereby, the adhesive sheet 1 provided with the adhesive layer 2 and the active ray absorbing layer 3 arrange|positioned on the surface of the adhesive layer 2 was obtained. Also, when the release film 5 is not peeled off, the adhesive sheet 1 having the release film 5, the adhesive layer 2 arranged on one side of the release film 5, and the active light absorbing layer 3 arranged on one side of the adhesive layer 2 is obtained. .

In addition, in the above description, the adhesive layer 2 is arranged on one side of the release film 5, but the adhesive layer 2 may be arranged on one side of the transparent base material from the viewpoint of workability.

The transparent substrate has a film shape extending in the plane direction, and has a flat plane and a flat lower surface.

The transparent substrate includes flexible plastic material.

Examples of such plastic materials include polyester resins such as polyethylene terephthalate (PET), polybutylene terephthalate, and polyethylene naphthalate; for example, polymethacrylate, etc. (Meth)acrylic resins (acrylic resins and/or methacrylic resins); polyolefin resins such as polyethylene, polypropylene, cycloolefin polymer (COP); such as polycarbonate resins; such as polyether resins Resins; such as polyarylate resins; such as melamine resins; such as polyamide resins; such as polyimide resins; such as cellulose resins; such as polystyrene resins;

When the adhesive layer 2 is colored by irradiating active light rays (preferably ultraviolet rays) from the transparent substrate side, it is preferable that the substrate 5 has transparency to light. Specifically, the total light transmittance (JIS K 7375-2008) of the transparent substrate is, for example, 80% or more, preferably 85% or more.

From the viewpoint of both transparency to light and mechanical strength, polyester resin is preferably used as the plastic material, and polyethylene terephthalate (PET) is more preferably used.

The thickness of the transparent substrate is, for example, 4 μm or more, preferably 20 μm or more, more preferably 30 μm or more, further preferably 45 μm or more, and, for example, 500 μm or less, from the viewpoint of flexibility and operability In terms of thickness, it is preferably 300 μm or less, more preferably 200 μm or less, and still more preferably 100 μm or less.

When arranging the adhesive layer 2 on one side of the transparent substrate, the above-mentioned adhesive composition (solution of the adhesive composition) is applied to one side of the transparent substrate in the same manner as above, and the solvent is dried and removed if necessary.

In addition, the adhesive sheet 1 may be irradiated with active light rays (preferably ultraviolet rays) to the adhesive layer 2 when the intermediate laminate 6 described below is produced or before the intermediate laminate 6 described below is produced.

When the adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) at the time of manufacturing the intermediate laminate 6, specifically, active light rays (preferably ultraviolet rays) are irradiated after the arrangement step.

Specifically, active light rays (preferably ultraviolet rays) are irradiated in the irradiation step in the manufacturing method of the intermediate laminate 6 described below.

Also, when the adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) before manufacturing the following intermediate laminate 6, specifically, the active light rays (preferably ultraviolet rays) are irradiated after the adhesive layer preparation step and before the arrangement step. UV rays).

The case where active light rays (preferably ultraviolet rays) are irradiated after the adhesive layer preparation step and before the placement step will be described with reference to FIG. 3 .

In the adhesive layer preparation step, as shown in FIG. 3A , an adhesive layer 2 is prepared on one side of the release film 5 in the same manner as the above method.

Then, after the adhesive layer preparation step, as shown in FIG. 3B , the entire adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) from the surface side of the release film 5 .

Then, in the disposing step, as shown in FIG. 3C , the active light absorbing layer 3 is disposed on one side of the adhesive layer 2 .

According to this method, the entire adhesive layer 2 can be discolored in advance, and further coloring of the colored portion by external light (active light) can be suppressed.

Also, in the above description, the active light absorbing layer 3 is disposed on one side of the adhesive layer 2 in the disposing step, but as shown in FIG. 3D , the release film 5 on the other side of the adhesive layer 2 ( In the case of preparing an adhesive layer 2 on one side of the material, it is a transparent base material) to be replaced and attached to an active light absorbing layer 3 .

In addition, in the above description, the entire adhesive layer 2 is discolored, but a part of the adhesive layer 2 may be discolored.

In this case, as shown in FIG. 3E , on the other side of the part 51 that will be irradiated with active light (preferably ultraviolet rays) (in detail, it is arranged on the other side of the part 51 that will be irradiated with active light (preferably ultraviolet rays) The other side of the peeling film 5) is not configured to block the mask 7 of the active light (preferably ultraviolet), and is not irradiated with the active light (preferably ultraviolet). The other side of the release film 5) on the other side of the part 52 that is preferably ultraviolet rays) is equipped with a mask 7 that blocks active light rays (preferably ultraviolet rays), and irradiates active light rays (preferably ultraviolet rays) from the surface side of the release film 5. ).

And, in the disposing step, as shown in FIG. 3F , the active light absorbing layer 3 is disposed on one surface of the adhesive layer 2 .

Thereby, part of the adhesive layer 2 can be discolored in advance, and coloring by external light (active light) can be suppressed in addition to the colored part.

Also, in this case, the peeling film 5 on the other side of the adhesive layer 2 (transparent substrate when the adhesive layer 2 is prepared on one side of the transparent substrate) can also be replaced and attached as the active light absorbing layer 3 .

Specifically, as shown in FIG. 3G , all of the peeling film 5 can be replaced and attached as the active light absorbing layer 3 , and, as shown in FIG. 3H , the active light absorbing layer 3 can be placed on a surface that is not irradiated with active light (preferably ultraviolet rays). The release film 5 on the other side of the portion 52 (transparent substrate when the adhesive layer 2 is prepared on one side of the transparent substrate) is replaced and attached to the active light absorbing layer 3 .

In addition, in the above description, the adhesive sheet 1 includes the adhesive layer 2 and the active ray absorbing layer 3 , but an intermediate layer such as the above-mentioned transparent substrate may be interposed between the adhesive layer 2 and the active ray absorbing layer 3 .

2. Intermediate laminate As shown in FIG. 4, the intermediate laminate 6 has a film shape (including a sheet shape) with a specific thickness, extends in a direction (plane direction) perpendicular to the thickness direction, and has a flat upper surface and a flat lower surface. .

Specifically, the intermediate laminate 6 includes: an adhesive sheet 1 having an adhesive layer 2 and an active light absorbing layer 3 disposed on one side of the adhesive layer 2; and an adherend 4 disposed on the adhesive sheet 1. The other side (the other side of the adhesive layer 2).

Details will be described below, but the intermediate laminate 6 is obtained by attaching the above-mentioned adhesive sheet 1 to the adherend 4 .

Since the intermediate laminate 6 is provided with the active ray absorbing layer 3 , it is possible to suppress coloration of the non-irradiated/low-irradiated portion 21 (described below) in the adhesive layer 2 by external light (active ray).

2-1. Adhesive sheet As described above, the adhesive sheet 1 includes the adhesive layer 2 and the active ray absorbing layer 3 disposed on one surface of the adhesive layer 2 .

Moreover, as mentioned above, the adhesive sheet 1 may laminate|stack the release film 5 on the other surface of the adhesive layer 2 as needed.

In this case, the adhesive sheet 1 is equipped with the peeling film 5, the adhesive layer 2, and the active ray absorbing layer 3 in this order.

In the following description, the case where the adhesive sheet 1 provided with the peeling film 5 is used is demonstrated in full detail.

In addition, the adhesive layer 2 in the adhesive sheet 1 has a high light transmittance portion 10 with a relatively high visible light transmittance at a wavelength of 550 nm, and a low light transmittance portion 11 with a relatively small visible light transmittance at a wavelength of 550 nm.

Furthermore, the details will be described below, and the visible light transmittance at a wavelength of 550 nm of the high light transmittance portion 10 and the low light transmittance portion 11 is determined by the manufacturing method of the intermediate laminate 6 described below.

2-2. Adhered body The to-be-adhered body 4 is a to-be-reinforced body reinforced with the adhesive sheet 1, For example, an optical device, an electronic device, its component parts, etc. are mentioned.

In addition, the adherend 4 has a flat plate shape in FIG. 4 , but the shape of the adherend 4 is not particularly limited, and various shapes are selected according to the types of optical devices, electronic devices and their structural parts.

Further, the details will be described below. In the manufacturing method of the intermediate laminate 6, when the adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) from the surface side of the adherend 4 (hereinafter referred to as 2A Embodiment) The manufacturing method of the intermediate laminate 6 is determined according to whether the adherend 4 transmits the active light (preferably ultraviolet) or blocks the active light (preferably ultraviolet).

Among such adherends 4 , the adherend 4 that transmits active light rays (hereinafter referred to as the first adherend 30 ) preferably includes the first adherend 30 that transmits ultraviolet rays.

As the 1st to-be-adhered body 30 which transmits an ultraviolet-ray, an alkali-free glass, a PET film, etc. are mentioned, for example.

The average transmittance of the active light rays of the first adherend 30 that transmits the active light rays is, for example, 60% or more, preferably 65% or more. In the case of the first adherend 30 , the average transmittance of the first adherend 30 that transmits ultraviolet rays at a wavelength of not less than 300 nm and not more than 400 nm is, for example, 60% or more, preferably 65% or more.

When the average transmittance is equal to or greater than the above lower limit, active light rays (preferably ultraviolet rays) can pass through the first adherend 30 and the adhesive layer 2 can be irradiated with active light rays (preferably ultraviolet rays).

In addition, as the adherend 4 (hereinafter referred to as the second adherend 31 ) that blocks active light rays (preferably ultraviolet rays) among such adherends 4 , a second adherend that absorbs active light rays can be cited. 31. The second adherend 31 that reflects active light (does not transmit active light).

As the 2nd to-be-adhered body 31 which absorbs an active ray, Preferably, the 2nd to-be-adhered body 31 which absorbs an ultraviolet-ray is mentioned.

As the 2nd to-be-adhered body 31 which absorbs an ultraviolet-ray, a polyimide film, the glass plate to which the said ultraviolet absorber was apply|coated, etc. are mentioned, for example.

The average transmittance of active light of the second adherend 31 that absorbs active light is, for example, 15% or less, preferably less than 10%. In particular, the second adherend 31 that absorbs active light is the second adherend that absorbs ultraviolet rays. In the case of the adherend 31, the average transmittance of the second adherend 31 that absorbs ultraviolet rays at a wavelength of 300 nm to 400 nm is, for example, 15% or less, preferably 10% or less.

When the said average transmittance is more than the said minimum, the 2nd to-be-adhered body 31 can absorb actinic light (preferably ultraviolet-ray).

As the 2nd to-be-adhered body 31 which reflects an active ray, Preferably, the 2nd to-be-adhered body 31 which reflects ultraviolet-ray is mentioned.

As the 2nd to-be-adhered body 31 which reflects an ultraviolet-ray, metal substrates, such as a copper plate, etc. are mentioned, for example.

2-3. Manufacturing method of intermediate laminate The manufacturing method of the intermediate laminate 6 includes the following steps: a preparation step, which is to prepare the above-mentioned adhesive sheet 1; an irradiation step, which is to irradiate the adhesive layer 2 with active light (preferably ultraviolet rays) to form active light on the adhesive layer 2 ( The highly irradiated portion 20 with relatively high exposure to active light (preferably ultraviolet) and the relatively low exposure to active light (preferably ultraviolet), or the non-irradiated/low exposure to active light (preferably ultraviolet) Irradiating the part 21, thereby making the visible light transmittance at the wavelength 550 nm of the highly irradiated part 20 smaller than the visible light transmittance at the wavelength 550 nm of the non-irradiated/low irradiated part 21; The other side is attached to the adherend 4.

That is, since the adhesive sheet 1 is used in the manufacturing method of the intermediate laminate 6, the intermediate laminate 6 obtained by the manufacturing method of the intermediate laminate 6 can suppress the coloring of parts other than the non-irradiated/low-irradiated portion 21. Colored by ambient light (reactive rays).

Hereinafter, the manufacturing method of the intermediate laminate 6 will be described respectively according to the order of each step and the irradiation direction of active light (preferably ultraviolet rays).

Specifically, as the order of each step, the irradiation step is carried out after the preparation step, and the bonding step is carried out after the irradiation step (hereinafter referred to as the first embodiment), or the bonding step is carried out after the preparation step, and in After the bonding step, the irradiation step is implemented (hereinafter referred to as the second embodiment).

In addition, as the direction of irradiation of active light rays (preferably ultraviolet rays), in the first embodiment, the adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) from the surface side of the release film 5 (the surface side of the adhesive layer 2). (hereinafter referred to as Embodiment 1A), or, the adhesive layer 2 is irradiated with active rays (preferably ultraviolet rays) from the surface side of the active ray absorbing layer 3 (hereinafter referred to as Embodiment 1B). Also, in the second embodiment, the adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) from the surface side of the adherend 4 (hereinafter referred to as Embodiment 2A), or, from the surface side of the active light-absorbing layer 3 The side is irradiated with active light rays (preferably ultraviolet rays) to the adhesive layer 2 (hereinafter referred to as Embodiment 2B).

Each embodiment will be described in detail below.

Furthermore, in the manufacturing method of the intermediate laminate 6, the unirradiated/low-irradiated portion 21 is determined to be the unirradiated portion 22 or the low-irradiated portion 23 according to the irradiation amount of active light (preferably ultraviolet rays), but in the following In the description, the case where the unirradiated/low-irradiated portion 21 is the unirradiated portion 22 will be described in detail.

In addition, the unirradiated portion 22 is a portion not irradiated with active light (preferably ultraviolet rays), and the visible light transmittance of the unirradiated portion 22 at a wavelength of 550 nm is, for example, 80% or more, preferably 90% or more.

The non-irradiated part 22 will have transparency if the said visible light transmittance is more than the said minimum.

2-3-1. Embodiment 1A In Embodiment 1A, the irradiation step is implemented after the preparation step, and the bonding step is implemented after the irradiation step.

In addition, in the 1A embodiment, in the irradiation step, the adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) from the surface side of the adhesive layer 2 .

Embodiment 1A will be described with reference to FIG. 5 .

In the preparation step, as shown in FIG. 5A , an adhesive sheet 1 is prepared.

In the step of irradiating, as shown in FIG. 5B , the adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) to form a high-irradiation portion 20 with a relatively high irradiation amount of active light rays (preferably ultraviolet rays) on the adhesive layer 2, And the non-irradiated portion 22 that is not irradiated with active light (preferably ultraviolet rays).

Furthermore, in the following description, the case where active light rays (preferably ultraviolet rays) are irradiated to a part of the adhesive sheet 1 (adhesive layer 2) will be described. Specifically, the adhesive sheet 1 is divided in the plane direction. It consists of three parts, irradiating active light rays (preferably ultraviolet rays) at two ends of them, and setting a part of the adhesive sheet 1 (adhesive layer 2) irradiated with active light rays (preferably ultraviolet rays) as a high-irradiation part 20 (in other words, the adhesive sheet 1 is divided into three parts in the plane direction, and only one of the central parts is an unirradiated part 22).

Specifically, in the irradiation step, in the adhesive sheet 1, for the highly irradiated portion 20, active light rays (preferably ultraviolet rays) are irradiated from the surface side of the release film 5 (the surface side of the adhesive layer 2), and the non-irradiated Part 22 is not irradiated with active light rays (preferably ultraviolet rays).

In detail, the mask 7 for blocking active light (preferably ultraviolet rays) is not arranged in the highly irradiated part 20 (specifically, the other side of the release film 5 disposed on the other side of the high irradiated part 20). The irradiated part 22 (in detail, the other side of the release film 5 arranged on the other side of the non-irradiated part 22) is equipped with a mask 7 that blocks active light (preferably ultraviolet rays), and from the surface side of the release film 5 (adhesive The surface side of layer 2) is irradiated with active light rays (preferably ultraviolet rays).

Thereby, active light rays (preferably ultraviolet rays) are irradiated only to the highly irradiated portion 20 .

And, in the adhesive layer 2 in the highly irradiated portion 20, acid is generated from the photoacid generator, and the compound colored by the acid is colored (specifically, black) by the acid. As a result, the adhesive layer 2 in the highly irradiated portion 20 changes from colorless (transparent) to colored (visible light transmittance at a wavelength of 550 nm becomes low). Thus, the visible light transmittance of the highly irradiated portion 20 at a wavelength of 550 nm is smaller than that of the non-irradiated portion 22 at a wavelength of 550 nm (specifically, the highly irradiated portion 20 is darker than the non-irradiated portion 22 ).

That is, the highly irradiated portion 20 having a relatively low visible light transmittance at a wavelength of 550 nm and the non-irradiated portion 22 having a relatively high visible light transmittance at a wavelength of 550 nm are formed.

In this way, the high irradiated portion 20 becomes the low light transmittance portion 11 , and the non-irradiated portion 22 becomes the high light transmittance portion 10 .

In the attaching step, as shown in FIG. 5C , the other side of the adhesive sheet 1 (the other side of the adhesive layer 2 ) is attached to the adherend 4 .

Specifically, the release film 5 is peeled off from the adhesive sheet 1, and the adherend 4 is placed on the other surface of the adhesive sheet 1 (the other surface of the adhesive layer 2).

Thus, an intermediate laminate 6 is obtained, which includes: an adhesive sheet 1 having an adhesive layer 2 and an active light absorbing layer 3 disposed on one side of the adhesive layer 2; and an adherend 4 disposed on the adhesive sheet 1 The other side (the other side of the adhesive layer 2).

In addition, in the intermediate laminate 6, the adhesive layer 2 has a high light transmittance portion 10 having a relatively high visible light transmittance at a wavelength of 550 nm, and a low light transmittance portion 11 having a relatively small visible light transmittance at a wavelength of 550 nm. .

In addition, in the intermediate laminate 6, the visible light transmittance of the low light transmittance portion 11 at a wavelength of 550 nm is, for example, less than 20%, preferably 10% or less, and, for example, 0.01% or more, and the high light transmittance The visible light transmittance of the high-efficiency part 10 at a wavelength of 550 nm is, for example, 80% or more, preferably 90% or more.

If the visible light transmittance of the low light transmittance portion 11 does not reach the above upper limit, the low light transmittance portion 11 can be reliably given the function of absorbing light.

Moreover, if the said visible light transmittance of the high light transmittance part 10 is more than the said minimum, the high light transmittance part 10 will have transparency.

According to Embodiment 1A, the effect of the above-mentioned manufacturing method of the intermediate laminate 6 is exhibited, and since the irradiation step is performed after the preparation step, and the bonding step is performed after the irradiation step, the transmittance formed in the irradiation step is different. The patterned shape of the region is easily maintained even when exposed to ambient light.

Also, according to Embodiment 1A, since the adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) from the surface side of the peeling film 5 (the surface side of the adhesive layer 2) in the irradiation step, the adhesive layer 2 can be reliably irradiated. coloring.

Moreover, especially if the adherend 4 is the second adherend 31 , it is possible to suppress coloring of the non-irradiated portion 22 by external light (active light) from the surface side of the second adherend 31 .

2-3-2. Embodiment 1B In Embodiment 1B, the irradiation process is implemented after the preparation process, and the bonding process is implemented after the irradiation process.

In addition, in the 1B embodiment, in the irradiation step, the adhesive layer 2 is irradiated with active rays (preferably ultraviolet rays) from the surface side of the active rays absorbing layer 3 .

Specifically, in the irradiating step, by irradiating the active ray absorbing layer 3 from the surface side of the active ray absorbing layer 3 with an amount of active light (preferably ultraviolet rays) exceeding the amount of light absorbed by the active ray absorbing layer 3, the adhesion is achieved. Layer 2 changes color.

Embodiment 1B will be described with reference to FIG. 6 .

In the preparation step, as shown in FIG. 6A , the adhesive sheet 1 is prepared in the same manner as in the above-mentioned 1A embodiment.

In the irradiation step, as shown in FIG. 6B, the adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) to form a high-irradiation portion 20 with a relatively high irradiation amount of active light rays (preferably ultraviolet rays) on the adhesive layer 2, And the non-irradiated portion 22 that is not irradiated with active light (preferably ultraviolet rays).

Specifically, in the irradiation step, in the adhesive sheet 1, for the highly irradiated portion 20, an active ray (preferably ultraviolet ray) is irradiated from the side of the active ray absorbing layer 3 (the amount of light exceeding the amount absorbed by the active ray absorbing layer 3 The active light (preferably ultraviolet)) does not irradiate the unirradiated portion 22 with active light (preferably ultraviolet).

In detail, the mask 7 for blocking active light (preferably ultraviolet rays) is not arranged in the highly irradiated part 20 (specifically, one side of the active light absorbing layer 3 arranged on one side of the high irradiated part 20), and The irradiated part 22 (in detail, it is one side of the active light absorbing layer 3 disposed on the side of the unirradiated part 22) is equipped with a mask 7 for blocking active light (preferably ultraviolet rays), from the surface side of the active light absorbing layer 3 Acting light (preferably ultraviolet) is irradiated (acting light (preferably ultraviolet) in an amount exceeding the amount of light absorbed by the active light absorbing layer 3).

Thereby, only the highly irradiated portion 20 is irradiated with active light rays (preferably ultraviolet rays), and the highly irradiated portion 20 (low light transmittance portion 11) and the non-irradiated portion 22 (high light transmittance portion 11) can be formed similarly to the above-mentioned first A embodiment. part 10).

In the attaching step, as shown in FIG. 6C , the other side of the adhesive sheet 1 (the other side of the adhesive layer 2 ) is attached to the adherend 4 in the same manner as in the above-mentioned 1A embodiment.

Thus, an intermediate laminate 6 is obtained, which includes: an adhesive sheet 1 having an adhesive layer 2 and an active light absorbing layer 3 disposed on one side of the adhesive layer 2; and an adherend 4 disposed on the adhesive sheet 1 The other side (the other side of the adhesive layer 2).

In addition, in the intermediate laminate 6, the adhesive layer 2 has a high light transmittance portion 10 having a relatively high visible light transmittance at a wavelength of 550 nm, and a low light transmittance portion 11 having a relatively small visible light transmittance at a wavelength of 550 nm. .

In addition, in the intermediate laminate 6, the visible light transmittance of the low light transmittance portion 11 at a wavelength of 550 nm is, for example, less than 20%, preferably 10% or less, and, for example, 0.01% or more, and the high light transmittance The visible light transmittance of the high-efficiency part 10 at a wavelength of 550 nm is, for example, 80% or more, preferably 90% or more.

If the visible light transmittance of the low light transmittance portion 11 does not reach the above upper limit, the low light transmittance portion 11 can be reliably given the function of absorbing light.

Moreover, if the said visible light transmittance of the high light transmittance part 10 is more than the said minimum, the high light transmittance part 10 will have transparency.

According to Embodiment 1B, the effect of the manufacturing method of the above-mentioned intermediate laminate 6 is brought into play, and since the irradiation step is performed after the preparation step, and the lamination step is performed after the irradiation step, the bonding step is performed after the irradiation step (adhesive layer 2 and active layer 2). When a problem occurs in bonding of the light absorbing layer 3 ), the next step (irradiation step) can be stopped in advance, and as a result, the efficiency is improved.

Also, according to Embodiment 1B, since the adhesive layer 2 is irradiated with active light (preferably ultraviolet rays) from the surface side of the active light absorption layer 3 in the irradiation step, it is necessary to irradiate the active light absorption layer 3 with a large amount of light. The active light rays (preferably ultraviolet rays) can easily control the transmittance of the highly irradiated part 20.

Moreover, especially if the adherend 4 is the second adherend 31 , it is possible to suppress coloring of the non-irradiated portion 22 by external light (active light) from the surface side of the second adherend 31 .

2-3-3. Embodiment 2A In Embodiment 2A, the bonding step is implemented after the preparation step, and the irradiation step is implemented after the bonding step.

In addition, in the 2A embodiment, in the irradiation step, the adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) from the surface side of the adherend 4 .

In the 2A embodiment, according to the adherend 4, the active light (preferably ultraviolet) is transmitted or the active light (preferably ultraviolet) is blocked (specifically, the adherend 4 is the first adherend 30 Or the second adherend 31) determines the manufacturing method of the intermediate laminate 6.

Hereinafter, the case where the adherend 4 is the first adherend 30 and the case where the adherend 4 is the second adherend 31 will be described.

Embodiment 2A in the case where the adherend 4 is the first adherend 30 will be described with reference to FIG. 7 .

In the preparation step, as shown in FIG. 7A , the adhesive sheet 1 is prepared in the same manner as in the above-mentioned 1A embodiment.

In the attaching step, as shown in FIG. 7B , the other side of the adhesive sheet 1 (the other side of the adhesive layer 2 ) is attached to the first adherend 30 in the same manner as in the above-mentioned 1A embodiment.

In the irradiation step, as shown in FIG. 7C , the adhesive layer 2 is irradiated with active light (preferably ultraviolet rays) to form a high irradiation portion 20 with a relatively high irradiation amount of active light (preferably ultraviolet rays) on the adhesive layer 2, And the non-irradiated portion 22 that is not irradiated with active light (preferably ultraviolet rays).

Specifically, in the irradiation step, in the adhesive sheet 1, the highly irradiated portion 20 is irradiated with active light (preferably ultraviolet rays) from the first adherend 30 side, and the non-irradiated portion 22 is not irradiated with active light. (preferably ultraviolet light).

Specifically, after a mask 7 for blocking active light (preferably ultraviolet) is disposed on a part of the other surface of the first adherend 30, the adhesive layer 2 is irradiated with active light (preferably ultraviolet).

In more detail, no mask for blocking active light (preferably ultraviolet rays) is placed on the highly irradiated portion 20 (specifically, the other side of the first adherend 30 arranged on the other side of the highly irradiated portion 20) 7. Arrange a mask 7 for blocking active light (preferably ultraviolet rays) on the unirradiated part 22 (in detail, the other side of the first adherend 30 arranged on the other side of the unirradiated part 22), from the first 1. The surface side of the adherend 30 is irradiated with active light rays (preferably ultraviolet rays).

At this time, since the first adherend 30 transmits active light rays (preferably ultraviolet rays), only the highly irradiated portion 20 can be irradiated with active light rays (preferably ultraviolet rays).

Thereby, the highly irradiated part 20 (low light transmittance part 11) and the non-irradiated part 22 (high light transmittance part 10) can be formed similarly to the said 1A embodiment.

Through the above, as shown in FIG. 7D , an intermediate laminate 6 is obtained, which includes: an adhesive sheet 1 including an adhesive layer 2 , and an active light absorbing layer 3 arranged on one side of the adhesive layer 2 ; and an adherend 4 (The first adherend 30) is arranged on the other side of the adhesive sheet 1 (the other side of the adhesive layer 2).

In addition, in the intermediate laminate 6, the adhesive layer 2 has a high light transmittance portion 10 having a relatively high visible light transmittance at a wavelength of 550 nm, and a low light transmittance portion 11 having a relatively small visible light transmittance at a wavelength of 550 nm. .

In addition, in the intermediate laminate 6, the visible light transmittance of the low light transmittance portion 11 at a wavelength of 550 nm is, for example, less than 20%, preferably 10% or less, and, for example, 0.01% or more, and the high light transmittance The visible light transmittance of the high-efficiency part 10 at a wavelength of 550 nm is, for example, 80% or more, preferably 90% or more.

If the visible light transmittance of the low light transmittance portion 11 does not reach the above upper limit, the low light transmittance portion 11 can be reliably given the function of absorbing light.

Moreover, if the said visible light transmittance of the high light transmittance part 10 is more than the said minimum, the high light transmittance part 10 will have transparency.

According to Embodiment 2A (the case where the adherend 4 is the first adherend 30), the effect of the above-mentioned manufacturing method of the intermediate laminate 6 is exerted, and since the bonding step is performed after the preparation step, and after the bonding step Since the irradiation step is performed, foreign matter or air bubbles can be confirmed during the bonding step.

In addition, according to Embodiment 2A (when the adherend 4 is the first adherend 30), since the adhesive layer 2 is irradiated with activity from the surface side of the adherend 4 (first adherend 30) in the irradiation step, Light (preferably ultraviolet rays), so the positioning accuracy of the part to be colored is improved.

Also, according to Embodiment 2A (the case where the adherend 4 is the first adherend 30), since the first adherend 4 is used, it is possible to Active light rays (preferably ultraviolet rays) are surely irradiated to the adhesive layer 2 .

Next, Embodiment 2B in the case where the adherend 4 is the second adherend 31 will be described with reference to FIG. 8 .

In the preparation step, as shown in FIG. 8A , the adhesive sheet 1 is prepared in the same manner as in the above-mentioned 1A embodiment.

In the bonding step, as shown in FIG. 8B , the second adherend 31 is arranged on a part of the other side of the adhesive sheet 1 (a part of the other side of the adhesive layer 2 ).

Specifically, the release film 5 is peeled off from the adhesive sheet 1, and the second adherend 31 is placed on a part of the other side of the adhesive sheet 1 (a part of the other side of the adhesive layer 2).

Furthermore, in the following description, the following case will be described, that is, as shown in FIG. 8B , the adhesive sheet 1 is divided into three parts in the surface direction, and the second adhesive sheet is arranged at one of the central parts. Body 31.

In the step of irradiating, as shown in FIG. 8C , the adhesive layer 2 is irradiated with active light (preferably ultraviolet rays) to form a high-irradiation portion 20 with a relatively high irradiation amount of active light (preferably ultraviolet rays) on the adhesive layer 2, And the non-irradiated portion 22 that is not irradiated with active light (preferably ultraviolet rays).

Specifically, in the irradiation step, in the adhesive sheet 1, the highly irradiated portion 20 is irradiated with active light (preferably ultraviolet rays) from the surface side of the second adherend 31, and the non-irradiated portion 22 is not irradiated. Active light (preferably ultraviolet light).

Specifically, unlike the above-mentioned 1A embodiment, 1B embodiment and 2A embodiment (in the case where the adherend 4 is the first adherend 30), a device for blocking active light rays (preferably ultraviolet rays) is not used. The mask 7 is used to directly irradiate active light rays (preferably ultraviolet rays) from the surface side of the second adherend 31 .

At this time, since the second adherend 31 blocks the active light rays (preferably ultraviolet rays), the second adherend 31 can replace the shield 7 that blocks the active light rays (preferably ultraviolet rays), preventing the disposition of The non-irradiated part 22 of the second adherend 31 is irradiated with active light (preferably ultraviolet rays). ).

Thereby, the highly irradiated part 20 (low light transmittance part 11) and the non-irradiated part 22 (high light transmittance part 10) can be formed similarly to the said 1A embodiment.

Through the above, as shown in FIG. 8D , an intermediate laminate 6 is obtained, which includes: an adhesive sheet 1 including an adhesive layer 2 , and an active light absorbing layer 3 arranged on one side of the adhesive layer 2 ; and an adherend 4 (Second adherend 31) is disposed on the other side of the adhesive sheet 1 (the other side of the adhesive layer 2).

In addition, in the intermediate laminate 6, the adhesive layer 2 has a high light transmittance portion 10 having a relatively high visible light transmittance at a wavelength of 550 nm, and a low light transmittance portion 11 having a relatively small visible light transmittance at a wavelength of 550 nm. .

In addition, in the intermediate laminate 6, the visible light transmittance of the low light transmittance portion 11 at a wavelength of 550 nm is, for example, less than 20%, preferably 10% or less, and, for example, 0.01% or more, and the high light transmittance The visible light transmittance of the high-efficiency part 10 at a wavelength of 550 nm is, for example, 80% or more, preferably 90% or more.

If the visible light transmittance of the low light transmittance portion 11 does not reach the above upper limit, the low light transmittance portion 11 can be reliably given the function of absorbing light.

Moreover, if the said visible light transmittance of the high light transmittance part 10 is more than the said minimum, the high light transmittance part 10 will have transparency.

According to Embodiment 2A (the case where the adherend 4 is the second adherend 31), the effect of the above-mentioned manufacturing method of the intermediate laminate 6 is exhibited, and since the bonding step is performed after the preparation step, and after the bonding step Since the irradiation step is performed, foreign matter or air bubbles can be confirmed during the bonding step.

Also, according to Embodiment 2A (the case where the adherend 4 is the second adherend 31), since the adhesive layer 2 is irradiated with activity from the surface side of the adherend 4 (second adherend 31) in the irradiation step, Light (preferably ultraviolet rays), so the positioning accuracy of the part to be colored is improved.

Also, according to Embodiment 2A (when the adherend 4 is the second adherend 31), the portion where the second adherend 4 is arranged (the non-irradiated portion 22) can be reliably prevented from being irradiated with active light (relatively preferably UV light).

2-3-4. Embodiment 2B In Embodiment 2B, the bonding step is implemented after the preparation step, and the irradiation step is implemented after the bonding step.

In addition, in the 2B embodiment, in the irradiation step, the adhesive layer 2 is irradiated with active rays (preferably ultraviolet rays) from the active rays absorbing layer 3 side.

Specifically, as in Embodiment 1B, by irradiating the actinic ray absorbing layer 3 from the surface side of the actinic ray absorbing layer 3 in the irradiating step with an amount of light exceeding the amount of light absorbed by the actinic ray absorbing layer 3 (preferably UV light) causes the adhesive layer 2 to change color.

Embodiment 2B will be described with reference to FIG. 9 .

In the preparation step, as shown in FIG. 9A , the adhesive sheet 1 is prepared in the same manner as in the above-mentioned 1A embodiment.

In the attaching step, as shown in FIG. 9B , the other side of the adhesive sheet 1 (the other side of the adhesive layer 2 ) is attached to the adherend 4 in the same manner as in the above-mentioned 1A embodiment.

In the step of irradiating, as shown in FIG. 9C , the adhesive layer 2 is irradiated with active light (preferably ultraviolet rays) to form a high-irradiation portion 20 with a relatively high irradiation amount of active light (preferably ultraviolet rays) on the adhesive layer 2, And the non-irradiated portion 22 that is not irradiated with active light (preferably ultraviolet rays).

Specifically, in the irradiation step, in the adhesive sheet 1, for the highly irradiated portion 20, active light rays (preferably ultraviolet rays) are irradiated from the surface side of the active light absorption layer 3 (beyond the absorption amount of the active light absorption layer 3). The amount of active light (preferably ultraviolet ray)) is not irradiated with active light (preferably ultraviolet ray) on the unirradiated portion 22 .

In detail, the mask 7 for blocking active light (preferably ultraviolet rays) is not arranged in the highly irradiated part 20 (specifically, one side of the active light absorbing layer 3 arranged on one side of the high irradiated part 20), and The irradiated part 22 (in detail, it is one side of the active light absorbing layer 3 disposed on the side of the unirradiated part 22) is equipped with a mask 7 for blocking active light (preferably ultraviolet rays), from the surface side of the active light absorbing layer 3 Irradiate with active light rays (preferably ultraviolet rays).

Thereby, only active light rays (preferably ultraviolet rays) can be irradiated to the highly irradiated portion 20, and the highly irradiated portion 20 (low light transmittance portion 11) and the non-irradiated portion 22 (high light transmittance portion 11) can be formed in the same manner as in the above-mentioned 1A embodiment. Transmittance section 10).

Through the above, as shown in FIG. 9D , an intermediate laminate 6 is obtained, which includes: an adhesive sheet 1 including an adhesive layer 2 , and an active light absorbing layer 3 arranged on one side of the adhesive layer 2 ; and an adherend 4 , which is arranged on the other side of the adhesive sheet 1 (the other side of the adhesive layer 2).

In addition, in the intermediate laminate 6, the adhesive layer 2 has a high light transmittance portion 10 having a relatively high visible light transmittance at a wavelength of 550 nm, and a low light transmittance portion 11 having a relatively small visible light transmittance at a wavelength of 550 nm. .

In addition, in the intermediate laminate 6, the visible light transmittance of the low light transmittance portion 11 at a wavelength of 550 nm is, for example, less than 20%, preferably 10% or less, and, for example, 0.01% or more, and the high light transmittance The visible light transmittance of the high-efficiency part 10 at a wavelength of 550 nm is, for example, 80% or more, preferably 90% or more.

If the visible light transmittance of the low light transmittance portion 11 does not reach the above upper limit, the low light transmittance portion 11 can be reliably given the function of absorbing light.

Moreover, if the said visible light transmittance of the high light transmittance part 10 is more than the said minimum, the high light transmittance part 10 will have transparency.

According to the 2B embodiment, the effect of the manufacturing method of the above-mentioned intermediate laminate 6 is exerted, and since the bonding step is performed after the preparation step, and the irradiation step is carried out after the bonding step, foreign matter or air bubbles can be prevented during the bonding step. Undergo verification.

In addition, according to Embodiment 2B, since the adhesive layer 2 is irradiated with active light (preferably ultraviolet rays) from the surface side of the active light absorption layer 3 in the irradiation step, it is necessary to irradiate the active light absorption layer 3 with a large amount of light. The active light rays (preferably ultraviolet rays) can easily control the transmittance of the highly irradiated part 20.

Moreover, especially if the adherend 4 is the second adherend 31 , it is possible to suppress coloring of the non-irradiated portion 22 by external light (active light) from the surface side of the second adherend 31 .

2-3-5. Variation example In the above description, the non-irradiated/low-irradiated portion 21 was described as the un-irradiated portion 22 , but in the following description, the un-irradiated/low-irradiated portion 21 may also be referred to as the low-irradiated portion 23 .

When the non-irradiated/low-irradiated portion 21 is the low-irradiated portion 23, the irradiation step includes: the first irradiation step, which is to adhere to the adhesive after the first mask 8 that blocks the active light (preferably ultraviolet rays) is arranged. Layer 2 is irradiated with active light rays (preferably ultraviolet rays), and forms the first irradiation part 40 irradiated with active light rays (preferably ultraviolet rays) on the adhesive layer 2, and the first irradiated part 40 not irradiated with active light rays (preferably ultraviolet rays). The irradiating part 41; and the second irradiating step, which is to irradiate the not yet irradiated part 41 in the adhesive layer 2 after the second mask 9 for blocking active light rays (preferably ultraviolet rays) is arranged in the first irradiating part 40 Active light rays (preferably ultraviolet rays) make the temporarily unirradiated portion 41 become the second irradiated portion 42 .

And, the details will be described below, because the irradiation amount of active light (preferably ultraviolet) in the first irradiation step is different from the irradiation amount of active light (preferably ultraviolet) in the second irradiation step, so the second Either one of the first irradiated portion 40 and the second irradiated portion 42 becomes the high irradiated portion 20 , and the other becomes the low irradiated portion 23 .

In the following description, the case where the non-irradiated/low-irradiated portion 21 is the low-irradiated portion 23 in Embodiment 1A will be described with reference to FIG. 10 (hereinafter referred to as a first modification of Embodiment 1A).

In the preparation step, as shown in FIG. 10A , the adhesive sheet 1 is prepared in the same manner as in the above-mentioned 1A embodiment.

In the step of irradiating, the adhesive layer 2 is irradiated with active light (preferably ultraviolet rays) to form a relatively high exposure portion 20 of active light rays (preferably ultraviolet rays) on the adhesive layer 2, and active light rays (preferably ultraviolet rays). The low-irradiation portion 23 where the irradiation amount of ultraviolet rays) is relatively low.

Specifically, in the first irradiation step of the irradiation steps, the first irradiated portion 40 and the not yet irradiated portion 41 are formed, and in the second irradiation step of the irradiation steps, the not yet irradiated portion 41 is made into the second irradiated portion 42.

In the first irradiation step, as shown in FIG. 10B, for the first irradiation part 40, active light rays (preferably ultraviolet rays) are irradiated from the surface side of the release film 5 (the surface side of the adhesive layer 2), and for the not yet irradiated part 41. Do not irradiate active light rays (preferably ultraviolet rays).

Furthermore, in the following description, the adhesive sheet 1 is divided into three parts in the plane direction, and two of the two end parts are set as the first irradiation part 40 (in other words, the adhesive sheet 1 is divided into three parts in the plane direction). The upper part is divided into 3 parts, and only one of the central part is the part 41 which has not been irradiated yet) for description.

More specifically, the first shielding part for blocking active light (preferably ultraviolet rays) is not arranged on the first irradiation part 40 (specifically, the other side of the release film 5 disposed on the other side of the first irradiation part 40). Cover 8, the first mask 8 for blocking active light (preferably ultraviolet rays) is arranged on the part 41 that has not been irradiated (in detail, it is the other side of the release film 5 disposed on the other side of the part 41 that has not been irradiated), Active light rays (preferably ultraviolet rays) are irradiated from the surface side of the adhesive layer 2 .

Thereby, only the 1st irradiation part 40 can be irradiated with actinic light (preferably ultraviolet-ray).

And, in the adhesive layer 2 in the first irradiation portion 40, acid is generated from the photoacid generator, and the compound colored by the acid is colored (specifically, black) by the acid. As a result, the adhesive layer 2 in the first irradiated portion 40 changes from colorless (transparent) to colored (transmittance of visible light at a wavelength of 550 nm decreases).

Next, in the second irradiation step, the portion 41 not yet irradiated becomes the second irradiation portion 42 .

Specifically, in the second irradiation step, the portion 41 that has not yet been irradiated is irradiated from the surface side of the adhesive layer 2 with active light rays (preferably ultraviolet rays) having a different light quantity from that in the first irradiation step. 1. The irradiating part 40 is not irradiated with active light (preferably ultraviolet rays).

More specifically, the second shielding device for blocking active light rays (preferably ultraviolet rays) is not arranged on the part 41 that has not been irradiated (specifically, the other side of the release film 5 disposed on the other side of the part 41 that has not been irradiated). Cover 9, the second mask 9 for blocking active light (preferably ultraviolet rays) is arranged on the first irradiation part 40 (in detail, the other side of the release film 5 disposed on the other side of the first irradiation part 40), Active light rays (preferably ultraviolet rays) are irradiated from the surface side of the adhesive layer 2 .

Thereby, active light rays (preferably ultraviolet rays) can be irradiated only to the part 41 which has not been irradiated yet, and the part 41 which has not been irradiated yet becomes the second irradiated part 42 .

And, in the adhesive layer 2 in the second irradiated portion 42, acid is generated from the photoacid generator, and the compound colored by the acid is colored (specifically, black) by the acid. As a result, the adhesive layer 2 in the second irradiated portion 42 changes from colorless (transparent) to colored (visible light transmittance at a wavelength of 550 nm becomes low).

Thereby, the 1st irradiation part 40 and the 2nd irradiation part 42 are formed in the adhesive layer 2. As shown in FIG.

And as mentioned above, in the 2nd irradiation process, the actinic ray (preferably ultraviolet-ray) of light quantity different from the 1st irradiation process is irradiated.

That is, the irradiation amounts of active light rays (preferably ultraviolet rays) of the first irradiation part 40 and the second irradiation part 42 are different from each other.

Therefore, either one of the first irradiating portion 40 and the second irradiating portion 42 becomes the high-irradiating portion 20 with a relatively high irradiation amount of active light (preferably ultraviolet rays) (in other words, the visible light transmittance at a wavelength of 550 nm Relatively low low light transmittance part 11), the other becomes a relatively low low irradiation part 23 with a relatively low irradiation amount of active light (preferably ultraviolet rays) (in other words, the visible light transmittance at a wavelength of 550 nm is relatively high The high light transmittance part 10).

In addition, in FIG. 10 , it is assumed that the first irradiated portion 40 is the high irradiated portion 20 (low light transmittance portion 11 ), and the second irradiated portion 42 is described as the low irradiated portion 21 (high light transmittance portion 10 ). .

Specifically, the visible light transmittance at the wavelength of 550 nm of the high-irradiation portion 20 is, for example, less than 20%, preferably less than 10%, and, for example, more than 0.01%. The visible light transmittance is, for example, 20% or more, preferably 40% or more, and, for example, 70% or less.

And, in the sticking step, as shown in FIG. 10D , the other side of the adhesive sheet 1 (the other side of the adhesive layer 2 ) is stuck to the adherend 4 in the same manner as in the above-mentioned 1A embodiment.

Thus, an intermediate laminate 6 is obtained, which includes: an adhesive sheet 1 having an adhesive layer 2 and an active light absorbing layer 3 disposed on one side of the adhesive layer 2; and an adherend 4 disposed on the adhesive sheet 1 The other side (the other side of the adhesive layer 2).

In addition, in the intermediate laminate 6, the adhesive layer 2 has a high light transmittance portion 10 having a relatively high visible light transmittance at a wavelength of 550 nm, and a low light transmittance portion 11 having a relatively small visible light transmittance at a wavelength of 550 nm. .

In addition, in the intermediate laminate 6, the visible light transmittance of the low light transmittance portion 11 at a wavelength of 550 nm is, for example, less than 20%, preferably 10% or less, and, for example, 0.01% or more, and the high light transmittance The visible light transmittance of the high-efficiency part 10 at a wavelength of 550 nm is, for example, 20% or more, preferably 40% or more, and, for example, 70% or less.

If the visible light transmittance of the low light transmittance portion 11 is within the above range and the visible light transmittance of the high light transmittance portion 10 is within the above range, the difference between the light transmittance portion 11 and the high light transmittance portion 10 can be reliably changed. tone.

According to the first variation example of the first A embodiment, the effect of the above-mentioned manufacturing method of the intermediate laminate 6 is exerted, and since the high-irradiation portion 20 (low light transmittance portion 11) and the The low-irradiation portion 23 (high light transmittance portion 10 ), therefore, can manufacture the intermediate laminate 6 including the adhesive layer 2 having regions with different color tones.

In addition, especially if the adherend 4 is the second adherend 31 , the low-irradiation portion 23 can be suppressed from being colored by external light (active light) from the surface side of the second adherend 31 .

Also, when the non-irradiated/low-irradiated portion 21 is the low-irradiated portion 23, the irradiation step includes: a third irradiation step, which is to irradiate the entire adhesive layer 2 with active light rays (preferably ultraviolet rays), so that The whole of the adhesive layer 2 is formed as the 3rd irradiation part 43 that is irradiated to the active light (preferably ultraviolet rays); The remaining part 46 of the 3rd irradiating part is irradiated with active light (preferably ultraviolet ray) after the mask 7 of the ultraviolet ray), so that the remaining part 46 of the 3rd irradiating part 43 becomes the 4th irradiating part 44.

In the following description, a case where the non-irradiated/low-irradiated portion 21 is the low-irradiated portion 23 in Embodiment 1A will be described with reference to FIG. 11 (hereinafter referred to as a second modification of Embodiment 1A).

In the preparation step, as shown in FIG. 11A , the adhesive sheet 1 is prepared in the same manner as in the above-mentioned 1A embodiment.

In the step of irradiating, the adhesive layer 2 is irradiated with active light (preferably ultraviolet rays) to form a relatively high exposure portion 20 of active light rays (preferably ultraviolet rays) on the adhesive layer 2, and active light rays (preferably ultraviolet rays). The low-irradiation portion 23 where the irradiation amount of ultraviolet rays) is relatively low.

Specifically, in the third irradiation step among the irradiation steps, the third irradiation portion 43 is formed, and in the fourth irradiation step among the irradiation steps, the remaining portion 46 (described below) of the third irradiation portion 43 becomes the fourth irradiation step. The irradiated portion 44 .

In the third irradiation step, as shown in FIG. 11B , the entire adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) from the surface side of the release film 5 (the surface side of the adhesive layer 2 ).

Thereby, the whole of the adhesive layer 2 is formed into the 3rd irradiation part 43.

In addition, in the adhesive layer 2 (third irradiated portion 43 ), acid is generated from the photoacid generator, and the compound colored by the acid is colored (specifically, black) by the acid. As a result, the whole of the adhesive layer 2 (the third irradiated portion 43 ) changes from colorless (transparent) to colored (visible light transmittance at a wavelength of 550 nm becomes low).

Then, in the fourth irradiation step, as shown in FIG. 11C , by disposing a mask 7 that blocks active light rays (preferably ultraviolet rays) in a part 45 of the third irradiation part 43, the rest of the third irradiation part 46 to irradiate active light rays (preferably ultraviolet rays), so that the remaining part 46 of the third irradiated portion 43 becomes the fourth irradiated portion 44 .

Furthermore, in the following description, the adhesive sheet 1 is divided into three parts in the plane direction, and the two end parts are set as the remaining part 46 of the third irradiation part 43 (in other words, the adhesive sheet 1 is divided into three parts in the plane direction, and only the center part 1 is a part 45 of the third irradiation part 43) and will be described.

Specifically, in the fourth irradiation step, the remaining part 46 of the third irradiation part 43 is irradiated with active light rays (preferably ultraviolet rays) from the surface side of the adhesive layer 2, and on the other hand, the remaining part 46 of the third irradiation part 43 is The remaining part is not irradiated with active light rays (preferably ultraviolet rays).

More specifically, the remaining part 46 of the third irradiating part 43 (specifically, the other side of the release film 5 arranged on the other side of the remaining part 46 of the third irradiating part 43) is not configured to block the active light (compared to the other side). The shield 7 that is preferably ultraviolet rays) is configured to block the active light ( The mask 7, which is preferably ultraviolet rays, irradiates active light rays (preferably ultraviolet rays) from the surface side of the adhesive layer 2.

Thereby, only the remaining part 46 of the third irradiating part 43 can be irradiated with active light (preferably ultraviolet rays), and the remaining part 46 of the third irradiating part 43 becomes the fourth irradiating part 44 .

And, in the adhesive layer 2 in the fourth irradiation portion 44, acid is generated from the photoacid generator, and the compound colored by the acid is colored (specifically, black) by the acid. As a result, the adhesive layer 2 in the fourth irradiation portion 44 changes from colorless (transparent) to colored (visible light transmittance at a wavelength of 550 nm becomes low).

Thereby, the visible light transmittance in the wavelength 550 nm of the 4th irradiation part 44 becomes lower than the 3rd irradiation part 43.

That is, the third irradiation portion 43 becomes the low irradiation portion 23 with a relatively low irradiation amount of active light (preferably ultraviolet rays) (in other words, the high light transmittance portion 10 with a relatively high visible light transmittance at a wavelength of 550 nm), The fourth irradiating portion 44 becomes the high irradiating portion 20 with a relatively high irradiation amount of active light (preferably ultraviolet rays) (in other words, the low light transmittance portion 11 with relatively low visible light transmittance at a wavelength of 550 nm).

Specifically, the visible light transmittance at the wavelength of 550 nm of the high-irradiation portion 20 is, for example, less than 20%, preferably less than 10%, and, for example, more than 0.01%. The visible light transmittance is, for example, 20% or more, preferably 40% or more, and, for example, 70% or less.

And, in the sticking step, as shown in FIG. 11D , the other side of the adhesive sheet 1 (the other side of the adhesive layer 2 ) is stuck to the adherend 4 in the same manner as in the above-mentioned 1A embodiment.

Thus, an intermediate laminate 6 is obtained, which includes: an adhesive sheet 1 having an adhesive layer 2 and an active light absorbing layer 3 disposed on one side of the adhesive layer 2; and an adherend 4 disposed on the adhesive sheet 1 The other side (the other side of the adhesive layer 2).

In addition, in the intermediate laminate 6, the adhesive layer 2 has a high light transmittance portion 10 having a relatively high visible light transmittance at a wavelength of 550 nm, and a low light transmittance portion 11 having a relatively small visible light transmittance at a wavelength of 550 nm. .

In addition, in the intermediate laminate 6, the visible light transmittance of the low light transmittance portion 11 at a wavelength of 550 nm is, for example, less than 20%, preferably 10% or less, and, for example, 0.01% or more, and the high light transmittance The visible light transmittance of the high-efficiency part 10 at a wavelength of 550 nm is, for example, 20% or more, preferably 40% or more, and, for example, 70% or less.

If the visible light transmittance of the low light transmittance portion 11 is within the above range and the visible light transmittance of the high light transmittance portion 10 is within the above range, the difference between the light transmittance portion 11 and the high light transmittance portion 10 can be reliably changed. tone.

According to the second modification of the first A embodiment, the effect of the above-mentioned manufacturing method of the intermediate laminate 6 is exerted, and since the high-irradiation portion 20 (low light transmittance portion 11) and The low-irradiation portion 23 (high light transmittance portion 10 ), therefore, can manufacture the intermediate laminate 6 including the adhesive layer 2 having regions with different color tones.

In addition, especially if the adherend 4 is the second adherend 31 , the low-irradiation portion 23 can be suppressed from being colored by external light (active light) from the surface side of the second adherend 31 .

In the above description, the case where the unirradiated/low-irradiated portion 21 is set as the low-irradiated portion 23 in the 1A embodiment has been described, and in the 1B embodiment and the 2A embodiment (using the first adherend) case) and the 2B embodiment, the non-irradiated/lowly irradiated portion 21 can also be set as the low-irradiated portion 23 based on the same procedure as the irradiation step in the first variation or the second variation of the above-mentioned 1A embodiment.

In addition, the intermediate laminate 6 in which the low light transmittance portion 11 in the adhesive layer 2 has a pattern shape can also be obtained by using a plurality of masks 7 for blocking active light rays (preferably ultraviolet rays).

Specifically, in the irradiation step of Embodiment 1A, as shown in FIG. 12A , on the other side of the release film 5, a plurality of masks 7 for blocking active light rays (preferably ultraviolet rays) are arranged (in detail, mutually 4 pieces are arranged at intervals).

Furthermore, by carrying out the preparatory step, the irradiation step, and the bonding step in the same manner as in the above-mentioned 1A embodiment, an intermediate laminate 6 in which the low light transmittance portion 11 in the adhesive layer 2 has a pattern shape can be obtained as shown in FIG. 12B .

In the intermediate laminate 6, if the low light transmittance portion 11 has a pattern shape, the pattern shape can be freely designed. [Example]

Examples and comparative examples are disclosed below, and the present invention will be described more specifically. In addition, this invention is not limited at all by an Example and a comparative example. In addition, specific numerical values such as blending ratios (content ratios), physical property values, and parameters used in the following descriptions may be replaced by corresponding blending ratios (content ratios), physical property values, parameters, etc. described in the above "embodiments" The upper limit value (the value defined by "below" and "less than") or the lower limit value (the value defined by "above" and "exceeding") of the corresponding record.

Furthermore, "parts" and "%" are quality standards unless otherwise specified.

1. Details of components Each component used in each Example and each comparative example is described below. BA: Butyl acrylate AA: Acrylic acid Tetrad C: Trade name: 1,3-bis(N,N-diglycidylaminomethyl)cyclohexane (epoxy crosslinking agent), Mitsubishi Gas Chemical BLACK ND1: Leuco dye, manufactured by Yamada Chemical Industry CPI-310B: Salt containing calcite and (C ₆ F ₅ ) ₄ B ^- , photoacid generator, manufactured by San-Apro Kapton 200H: Polyimide film, thickness 25 μm , KC2UA manufactured by TORAY-DUPONT Co., Ltd.: TAC film, thickness 25 μm, UVA (ultraviolet-A, ultraviolet A)-TAC manufactured by Konica Minolta Co., Ltd.: film with KC2UA and hard coat in sequence (by using hard coat treatment Obtained by forming a hard coat layer (thickness: 7 μm) on one side of KC2UA (thickness: 25 μm), thickness 32 μm UVA-TAC×1: 1 piece of UVA-TAC UVA-TAC×2: 2 pieces of UVA-TAC UVA -TAC×4: 4 pieces of UVA-TAC UVA-TAC×8: 8 pieces of UVA-TAC UVA-OCA (Optically Clear Adhesive, Optically Transparent Adhesive): Adhesive tape with ultraviolet absorption function, product name "CS9934U", thickness 100 μm, manufactured by Nitto Denko Co., Ltd.

2. Preparation of Adhesive Polymer Synthesis Example 1 95 parts by mass of butyl acrylate as a monomer component, 5 parts by mass of acrylic acid, and 0.2 parts by mass of azobisisobutyronitrile as a polymerization initiator were charged into a reaction vessel equipped with a thermometer, a stirrer, a reflux cooling pipe, and a nitrogen gas introduction pipe. 233 parts by mass of ethyl acetate as a solvent, nitrogen gas was passed through, and nitrogen replacement was performed for about 1 hour while stirring. Thereafter, it was heated to 60° C. and reacted for 7 hours to obtain a solution of an adhesive polymer having a weight average molecular weight (Mw) of 600,000.

3. Manufacture of adhesive sheet Example 1 To the solution of the adhesive polymer in Synthesis Example 1, 0.075 parts by mass of Tetrad C as a crosslinking agent was added relative to 100 parts by mass of the adhesive polymer in the solution of the adhesive polymer, 100 parts by mass of the adhesive polymer in the solution is 2 parts by mass of BLACK ND1 (leuco dye) as a compound colored by acid, 10 parts by mass relative to 100 parts by mass of the adhesive polymer in the solution of the adhesive polymer. Parts by mass of CP-310B (photoacid generator) as an acid generator were uniformly mixed to prepare an adhesive composition.

Next, Synthesis Example 1 was coated on one side of a polyethylene terephthalate film with a thickness of 50 μm (hereinafter referred to as release film A) with a release treatment on the surface using a grooved roll so that the thickness after drying became 25 μm. The adhesive composition was dried at 130° C. for 1 minute to remove the solvent. Thereby, the adhesive layer provided with the peeling film A on the other side was formed. Then, the release-treated surface of the release film B (polyethylene terephthalate film with a thickness of 25 μm and a silicone release treatment on the surface) was attached to one side of the adhesive layer. Thereafter, an aging treatment was carried out for 4 days in an environment of 25° C. to allow a cross-linking reaction to proceed. In this way, an adhesive layer is produced (prepared).

Then, the release film B arranged on one side of the adhesive layer is peeled off, and a glass substrate, a low-adhesive layer containing a known adhesive, a PET film, and a high-adhesive layer containing a known adhesive are sequentially arranged on one side of the adhesive layer. , and Kapton 200H as an ultraviolet absorbing layer.

Furthermore, the low-adhesive layer has the adhesive force of the grade which can peel off a glass substrate and a PET film.

Also, the average transmittance of ultraviolet rays of the low adhesive layer and the high adhesive layer is 50% or more.

In this way, an adhesive sheet including a release film A, an adhesive layer, a glass substrate, a low adhesive layer, a PET film, a high adhesive layer, and an ultraviolet absorbing layer (Kapton 200H) was obtained.

Example 2 An adhesive sheet was produced in the same manner as in Example 1 except that UVA-TAC×1 was used as the ultraviolet absorbing layer.

Example 3 An adhesive sheet was produced in the same manner as in Example 1 except that UVA-TAC×2 was used as the ultraviolet absorbing layer.

Example 4 An adhesive sheet was produced in the same manner as in Example 1 except that UVA-TAC×4 was used as the ultraviolet absorbing layer.

Example 5 An adhesive sheet was produced in the same manner as in Example 1 except that UVA-TAC×8 was used as the ultraviolet absorbing layer.

Example 6 An adhesive sheet was produced in the same manner as in Example 1 except that UVA-OCA was used as the ultraviolet absorbing layer.

Example 7 Except having used UVA-TAC and UVA-OCA as an ultraviolet absorbing layer, it carried out similarly to Example 1, and produced the adhesive sheet.

Specifically, an adhesive sheet provided with the release film A, the adhesive layer, the glass substrate, the low adhesive layer, the PET film, the high adhesive layer, UVA-TAC, and UVA-OCA in this order was obtained.

Comparative example 1 An adhesive sheet was produced in the same manner as in Example 1 except that a PET film (25 μm in thickness) was used as the ultraviolet absorbing layer.

4. Evaluation (The average transmittance of the adhesive layer before LED (Light Emitting Diode) irradiation) The release film B arranged on one side of the adhesive layer in Example 1 was peeled off, and one side of the adhesive layer was bonded to the glass substrate.

Thereafter, the release film A arranged on the other surface of the adhesive layer is peeled off. In this way, a sample for measuring the average transmittance was prepared.

The sample for measuring the average transmittance was set in a transmittance measuring device (U4100 spectrophotometer, manufactured by Japan High-Technologies Co., Ltd.) with the adhesive layer arranged on the light source side, and the average transmittance at a wavelength of 400 nm to 700 nm was measured. Rate.

Furthermore, the data measured only on the glass substrate was set as the baseline.

The results are shown in Table 1.

(Average transmittance of adhesive layer after LED irradiation) After irradiating the adhesive layer in the above average transmittance measurement sample with LED (365 nm, 8000 mJ/□) light, the average transmittance at a wavelength of 400 nm to 700 nm was measured by the same method as above.

The results are shown in Table 1.

(Average transmittance of UV absorbing layer) Set each ultraviolet absorbing layer in a transmittance measuring device (U4100 spectrophotometer, manufactured by Japan High-Technologies Co., Ltd.), and measure the average transmittance at a wavelength of 300 nm to 400 nm and the average transmittance at a wavelength of 400 nm to 700 nm Rate.

Furthermore, the data measured in the state where nothing is installed in the measuring device is set as the baseline.

The results are shown in Table 1.

(outside light stability) The adhesive sheets of each Example and each Comparative Example were placed so that light from a fluorescent lamp was irradiated from the ultraviolet absorbing layer side of the adhesive sheets of each Example and each Comparative Example.

Then, the average transmittance at a wavelength of 400 nm to 700 nm was measured at the start of leaving and after a certain period of time (after 24 hours, 48 hours, 120 hours, and 144 hours) after the start of leaving.

Specifically, the self-adhesive sheet peels off the low-adhesive layer, PET film, high-adhesive layer, and ultraviolet absorbing layer arranged on one side of the glass substrate, and peels off the release film A arranged on the other side of the adhesive layer. .

In this way, a sample for measuring the external light stability provided with an adhesive layer and a glass substrate in this order was prepared.

In addition, the sample for external light stability measurement was set in a transmittance measurement device (U4100 spectrophotometer, manufactured by Japan High-Technologies Co., Ltd.) with the adhesive layer arranged on the light source side, and the measurement wavelength was 400 nm to 700 nm. the average transmittance.

Furthermore, the data measured only on the glass substrate was set as the baseline.

Moreover, the rate of change after each elapse of time was calculated|required by the following formula (1). Change rate after each time = (average transmittance at the beginning of placement - average transmittance after each time) / (average transmittance at the beginning of placement) (1)

The results are shown in Table 2.

5. Explore In the evaluation of the average transmittance, the wavelength of the adhesive sheet of Example 1 of the adhesive sheet of Example 1, which includes an adhesive composition that can reduce the visible light transmittance at a wavelength of 550 nm by ultraviolet irradiation, is 400 nm to 700 nm before and after LED irradiation The average transmittance at nm decreases.

From this, it turns out that if the adhesive sheet provided with the said adhesive layer is used, the adhesive layer can be colored by irradiating an ultraviolet-ray at arbitrary timing.

In the evaluation of external light stability, the change rate of Examples 1 to 7 using ultraviolet absorbing layers with a wavelength of 300 nm to 400 nm and an average transmittance of 15% or less was 5.72 after 120 hours from the start of storage. %the following.

On the other hand, Comparative Example 1 using a PET film with a wavelength of 300 nm to 400 nm and an average transmittance of 69% had a change rate of 64.02% after 120 hours from the start of leaving.

From this, it can be seen that when an ultraviolet absorbing layer having a wavelength of 300 nm to 400 nm and an average transmittance of 15% or less is used, the external light stability is excellent.

Furthermore, it can be seen that since the external light stability is excellent, when it is desired to leave the colored portion in the adhesive layer transparently, or when it is desired to make the amount of coloring less than that of the colored portion, it is possible to suppress the external light from the colored portion ( UV) coloring. [Table 1] Table 1 Example Average transmittance Before LED light irradiation After LED light irradiation Example 1 95.64 16.92 [Table 2] Table 2 Example・Comparative Example No. UV absorbing layer external light stability Average transmittance at a wavelength of 400 to 700 nm (change rate after each time (%)) type Average transmittance at a wavelength of 300-400 nm Average transmittance at a wavelength of 400-700 nm when placement starts 24 hours later 48 hours later 120 hours later 144 hours later Comparative example 1 PET film 69.00 87.00 95.64 75.65 (20.9%) 55.92 (41.53%) 34.41 (64.02%) - Example 1 Kapton 200H 0.01 48.45 95.64 93.88 (1.84%) 94.03 (1.68%) 93.78 (1.94%) - Example 2 UVA-TAC×1 11.91 90.21 95.64 94.22 (1.48%) 93.49 (2.25%) 90.17 (5.72%) - Example 3 UVA-TAC×2 7.11 88.41 95.64 94.84 (0.84%) 94.37 (1.33%) 91.93 (3.88%) - Example 4 UVA-TAC×4 3.74 84.75 95.64 94.90 (0.77%) 94.52 (1.17%) 92.36 (3.43%) - Example 5 UVA-TAC×8 1.48 78.44 95.64 94.84 (0.84%) 94.43 (1.27%) 92.66 (3.12%) - Example 6 UVA-OCA1 9.54 87.50 95.64 94.87 (0.81%) 93.96 (1.76%) 90.4 (5.48%) 86.22 (9.85%) Example 7 UVA-OCA1/UVA-TAC 8.07 91.90 95.64 94.89 (0.78%) 94.11 (1.60%) 91.08 (4.77%) -

In addition, the above-mentioned invention is provided as an exemplary embodiment of the present invention, but it is only an illustration and should not be construed in a limited manner. Modifications of the present invention that are obvious to those skilled in the art are included in the following claims. [Industrial availability]

The adhesive sheet, the method for producing the adhesive sheet, the method for producing the intermediate laminate, and the intermediate laminate of the present invention can be suitably used in optical devices, electronic devices, and components thereof.

1: Adhesive sheet 2: Adhesive layer 3: UV absorbing layer 4: Adhered body 5: Peel off film 6: Intermediate laminate 7: mask 8: 1st mask 9: 2nd mask 10: High light transmittance part 11: Low light transmittance part 20: Highly irradiated part 21: Non-irradiated/low-irradiated part 22: Unirradiated part 23: Low exposure part 30: The first adherend 31: The second adherend 40: 1st irradiation part 41: The part that has not been irradiated yet 42: The second irradiation part 43: Part 3 Irradiation 44: Part 4 Irradiation 45: part 46: The rest 51: The part that will be irradiated with active light (preferably ultraviolet rays) 52: Part not irradiated with active light (preferably ultraviolet rays)

Fig. 1 is a schematic view showing an embodiment of the adhesive sheet of the present invention. Fig. 2 is a schematic view showing an embodiment of an adhesive sheet manufacturing method, Fig. 2A shows an adhesive layer preparation step for preparing an adhesive layer, and Fig. 2B shows an arrangement step on the active light absorbing layer side of one of the adhesive layers. Fig. 3 is a schematic diagram showing an embodiment of a method of manufacturing an adhesive sheet, Fig. 3A shows an adhesive layer preparation step for preparing an adhesive layer, and Fig. 3B shows a step of irradiating the entire adhesive layer with active light from the surface side of the release film, Figure 3C shows the step of disposing the active light absorbing layer on one area of the adhesive layer, Figure 3D shows the step of replacing the peeling film with the active light absorbing layer when the entire adhesive layer is irradiated with active light, and Figure 3E shows the steps from The step of irradiating a part of the adhesive layer with active light on the surface side of the release film. FIG. 3F shows the step of disposing the active light absorbing layer on one surface of the adhesive layer. FIG. 3G shows the step of irradiating a part of the adhesive layer with active light. The step of replacing all the peeling film with an active light absorbing layer. FIG. 3H shows the step of replacing a part of the peeling film with an active light absorbing layer when a part of the adhesive layer is irradiated with active light. Fig. 4 is a schematic view showing an embodiment of the intermediate laminate of the present invention. Fig. 5 is a schematic diagram showing the first A embodiment of the method of manufacturing the intermediate laminate of the present invention, Fig. 5A shows the preparatory steps for preparing the adhesive sheet, and Fig. 5B shows the surface side of the release film (the surface side of the adhesive layer) The step of irradiating the adhesive layer with active light, and Fig. 5C shows the step of attaching the adhesive sheet to the adherend. Fig. 6 is a schematic view showing the first embodiment of the method for producing the intermediate laminate of the present invention, Fig. 6A shows the preparatory steps for preparing the adhesive sheet, and Fig. 6B shows irradiating the adhesive layer with active light from the surface side of the active light absorbing layer In the irradiation step, Fig. 6C shows the step of attaching the adhesive sheet to the adherend. Fig. 7 is a schematic view showing Embodiment 2A of the method for producing an intermediate laminate of the present invention (the case where the adherend is the first adherend), and Fig. 7A shows the preparation steps for preparing an adhesive sheet, and Fig. 7B shows the preparation of the adhesive sheet. The step of attaching the adhesive sheet to the first adherend, Figure 7C shows the step of irradiating the adhesive layer with active light from the surface side of the first adherend, and Figure 7D shows the second A embodiment (the adherend is The intermediate laminate produced in the case of the first adherend). Fig. 8 is a schematic view showing Embodiment 2A of the method for producing the intermediate laminate of the present invention (the adherend is the second adherend), and Fig. 8A shows the preparatory steps for preparing the adhesive sheet, and Fig. 8B shows the preparation of the adhesive sheet. The step of attaching the adhesive sheet to the second adherend, FIG. 8C shows the step of irradiating the adhesive layer with active light from the surface side of the second adherend, and FIG. 8D shows the embodiment of 2A (the adherend is The intermediate laminate produced in the case of the second adherend). Fig. 9 is a schematic view showing the second embodiment of the method of manufacturing the intermediate laminate of the present invention, Fig. 9A shows the preparation step of preparing the adhesive sheet, and Fig. 9B shows the step of attaching the adhesive sheet to the adherend , FIG. 9C shows the irradiation step of irradiating the adhesive layer with active light from the surface side of the active light absorbing layer, and FIG. 9D shows the intermediate laminate produced in the 2B embodiment. Fig. 10 is a schematic diagram showing the first modification of the first embodiment of the first A embodiment of the method of manufacturing the intermediate laminate of the present invention. Fig. 10A shows the preparation steps for preparing the adhesive sheet, and Fig. 10B shows the formation of the first adhesive sheet by irradiating active light rays. The first irradiation step of the irradiated part and the not yet irradiated part. Figure 10C shows the second irradiation step of forming the not yet irradiated part into the second irradiated part by irradiating active light to the not yet irradiated part. Figure 10D shows the adhesion The step of attaching the sheet to the adherend. Fig. 11 is a schematic view showing the second modification of the first A embodiment of the method for producing an intermediate laminate of the present invention. Fig. 11A shows the preparation steps for preparing the adhesive sheet, and Fig. 11B shows the activity by irradiating the entire adhesive layer. The third irradiation step in which the whole of the adhesive layer is formed into the third irradiation part by light. FIG. 11C shows that the remaining part of the third irradiation part is irradiated with active light after a mask that blocks the active light is arranged in one part of the third irradiation part. light, and make the rest of the third irradiation part into the fourth irradiation step of the fourth irradiation part. Figure 11D shows the bonding step of bonding the adhesive sheet to the adherend. Fig. 12 is a schematic diagram showing a method of manufacturing an intermediate laminate in which the low light transmittance portion in the adhesive layer has a pattern shape. Fig. 12A shows the irradiation steps of disposing a plurality of masks for blocking active light rays, and Fig. 12B shows the steps in the adhesive layer. The low light transmittance portion has a patterned intermediate laminate.

1: Adhesive sheet

2: Adhesive layer

3: UV absorbing layer

Claims (24)

An adhesive sheet, characterized in that it has an adhesive layer and an active light absorbing layer disposed on one side of the above-mentioned adhesive layer, and the above-mentioned adhesive layer includes an adhesive combination that can reduce the transmittance of visible light at a wavelength of 550nm by irradiation of active light and the average transmittance of the active light rays of the above-mentioned active light-absorbing layer is 15% or less. The above-mentioned adhesive composition includes an adhesive polymer, a compound colored by an acid, and a photoacid generator. The adhesive polymer is A polymer obtained by polymerization of monomeric components. The adhesive sheet according to claim 1, wherein the above-mentioned adhesive layer comprises an adhesive composition capable of reducing the transmittance of visible light at a wavelength of 550 nm by irradiation of ultraviolet rays, the above-mentioned active light absorbing layer is an ultraviolet-absorbing layer, and the above-mentioned ultraviolet-absorbing layer The average transmittance of the wavelength of 300nm or more and 400nm or less is 15% or less. The adhesive sheet according to claim 2, wherein the average transmittance of the above-mentioned ultraviolet absorbing layer at a wavelength of 400 nm to 700 nm is 50% or more. The adhesive sheet according to claim 2, wherein the above-mentioned ultraviolet absorbing layer contains an ultraviolet absorber. A method for manufacturing an adhesive sheet, which is characterized by comprising the following steps: an adhesive layer preparation step, which is to prepare an adhesive layer that can reduce the visible light at a wavelength of 550nm by irradiation of active light rays. An adhesive layer of an adhesive composition with a light transmittance; and an arranging step of arranging an active ray absorbing layer with an average transmittance of active light of 15% or less on one side of the above-mentioned adhesive layer, the above-mentioned adhesive composition comprising an adhesive polymer A compound colored by acid, and a photoacid generator, the adhesive polymer is a polymer obtained by polymerization of monomer components. The method for producing an adhesive sheet according to claim 5, wherein the adhesive layer is irradiated with active light after the adhesive layer preparing step and before the arranging step. The method of manufacturing an adhesive sheet according to claim 5, wherein the active light is irradiated after the above-mentioned arrangement step. A method of manufacturing an intermediate laminate, characterized by comprising the following steps: a preparation step of preparing an adhesive sheet produced by the method for manufacturing an adhesive sheet as claimed in claim 7; an irradiation step of irradiating the above-mentioned adhesive layer By irradiating active light to form a high-irradiation part with a relatively high irradiation amount of active light on the above-mentioned adhesive layer, and a relatively low irradiation amount of active light or a non-irradiated/low-irradiation part that is not irradiated with active light, thereby making the above-mentioned high The visible light transmittance of the irradiated part at a wavelength of 550nm is smaller than the visible light transmittance of the above-mentioned non-irradiated/low-irradiated part at a wavelength of 550nm; The manufacturing method of the intermediate laminate according to claim 8, wherein the above-mentioned preparation step is carried out after the above-mentioned preparation step The above-mentioned irradiation step, and the above-mentioned bonding step is implemented after the above-mentioned irradiation step. The manufacturing method of the intermediate laminate according to Claim 8, wherein the above-mentioned bonding step is carried out after the above-mentioned preparing step, and the above-mentioned irradiation step is carried out after the above-mentioned bonding step. The method of manufacturing an intermediate laminate according to claim 9, wherein in the irradiation step, the adhesive layer is irradiated with active light from the surface side of the active light absorbing layer. The method of manufacturing an intermediate laminate according to claim 10, wherein in the irradiation step, the adhesive layer is irradiated with active light from the surface side of the active light absorbing layer. The method of manufacturing an intermediate laminate according to claim 9, wherein in the irradiation step, the adhesive layer is irradiated with active light from the surface side of the adhesive layer. The method of manufacturing an intermediate laminate according to Claim 10, wherein in the irradiation step, the adhesive layer is irradiated with active light from the surface side of the adherend. The method for manufacturing an intermediate laminate according to claim 14, wherein the average transmittance of the active light rays of the above-mentioned adherend is 60% or more, and in the above-mentioned irradiation step, a mask is arranged on a part of the other surface of the above-mentioned adherend. After breaking the mask of the active light, the above-mentioned adhesive layer is irradiated with active light. The manufacturing method of the intermediate laminate according to claim 14, wherein the above-mentioned adherend blocks active light rays, and in the above-mentioned bonding step, the above-mentioned adherend is arranged on a part of the other side of the above-mentioned adhesive sheet. The method of manufacturing an intermediate laminate according to any one of Claims 8 to 16, wherein the above-mentioned unirradiated/low-irradiated portion is an unirradiated portion that is not irradiated with active light rays, and the visible light transmittance at a wavelength of 550 nm of the above-mentioned unirradiated portion more than 80%. The manufacturing method of an intermediate laminate according to any one of Claims 8 to 15, wherein the above-mentioned non-irradiated/low-irradiated part is a low-irradiated part with a low irradiation amount of active light, and the above-mentioned irradiation step includes: a first irradiation step, which is By irradiating the above-mentioned adhesive layer with active light after the first mask that blocks the active light is arranged, the first irradiated portion irradiated with the active light and the temporarily unirradiated portion not irradiated with the active light are formed on the above-mentioned adhesive layer; and The second irradiating step is to irradiate the part of the adhesive layer that has not been irradiated with active light after arranging a second mask that blocks active light rays on the first irradiated part, so that the part that has not been irradiated is formed into A second irradiated portion; and any one of the first irradiated portion and the second irradiated portion is the high irradiated portion, and the other is the low irradiated portion. The method for manufacturing an intermediate laminate according to any one of Claims 8 to 15, wherein the non-irradiated/low-irradiated portion is a low-irradiated portion with a low amount of active light rays, The above-mentioned irradiating step includes: a third irradiating step of irradiating the entirety of the above-mentioned adhesive layer with active light to form the entirety of the above-mentioned adhesive layer as a third irradiated portion irradiated with active light; and a fourth irradiating step of The remaining part of the above-mentioned third irradiating part is formed as the fourth irradiating part by irradiating the remaining part of the above-mentioned third irradiating part with active light rays after arranging a mask for blocking active light rays on a part of the above-mentioned third irradiating part; In addition, the third irradiated portion is the low irradiated portion, and the fourth irradiated portion is the high irradiated portion. The method of manufacturing an intermediate laminate according to claim 18, wherein the visible light transmittance at a wavelength of 550 nm of the above-mentioned high-irradiation portion is less than 20%, and the visible light transmittance of the above-mentioned low-irradiation portion at a wavelength of 550 nm is not less than 20% and not more than 70%. . An intermediate laminate, characterized by comprising: an adhesive sheet comprising an adhesive layer and an active light absorbing layer disposed on one side of the adhesive layer; and an adherend disposed on the other side of the adhesive sheet; The adhesive layer has a high light transmittance part with a relatively large visible light transmittance at a wavelength of 550nm, and a low light transmittance part with a relatively small visible light transmittance at a wavelength of 550nm, and the average transmittance of the active light of the above active light absorbing layer less than 15%. The intermediate laminate according to claim 21, wherein the above-mentioned low light transmittance part has a pattern shape shape. The intermediate laminate according to claim 21 or 22, wherein the visible light transmittance at a wavelength of 550 nm of the above-mentioned high light transmittance part is above 80%. The intermediate laminate according to claim 21 or 22, wherein the visible light transmittance at a wavelength of 550 nm of the above-mentioned low light transmittance part is less than 20%, and the visible light transmittance of the above-mentioned high light transmittance part at a wavelength of 550 nm is more than 20% and Below 70%.

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