JP2001026759A - Adhesive composition for optical function member integrated display device, adhesive film, adhesive film laminate, optical function member integrated display device, and method of manufacturing the same - Google Patents

Abstract

(57) Abstract: A heat and / or light curable adhesive for bonding the optical function member and the display unit of the optical function member integrated display device in which the optical function member and the display unit are integrated. An adhesive for an optical function member-integrated display device, comprising as a main component a copolymer of ethylene, an acrylate-based and / or methacrylate-based monomer, and maleic acid and / or maleic anhydride. Provided are a composition, an adhesive film, an adhesive film laminate, an optical function member integrated display device, and a method for producing the same. According to the present invention, it is possible to easily and reliably obtain an optical-function-member-integrated display device having good display properties.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a light-transmitting material,
Anti-reflection treatment film used as a light transmissive member,
Optical functional members such as anti-reflection treated glass, anti-static glass, anti-static film, electromagnetic shielding material, near-infrared absorbing film, color filter, and display parts such as CRT (cathode ray tube-cathode tube) and LCD (liquid crystal) , An adhesive composition for bonding the optical function member and the display unit, an adhesive film, an adhesive film laminate, the adhesive composition and the adhesive The present invention relates to an optical function member integrated display device obtained by using a film and a method of manufacturing the same.

[0002]

2. Description of the Related Art Recently, anti-reflection treated films, anti-reflection treated glass,
An optical function member integrated type display device having a structure in which an optical function member such as an antistatic glass, an antistatic film, an electromagnetic wave shielding material, a near-infrared absorbing film, and a color filter is integrated with a display unit such as a CRT or an LCD is a bank of Japan. ATM and C
D. It has been widely used in ticket vending machines at stations, portable information terminals, mobile phones, personal computers, and the like.

As shown in FIG. 6, for example, a display device integrated with an optical function member usually has a spacer s interposed between an optical function member 1 such as an anti-reflection treated glass and a display unit 2 such as an LCD. In addition, a constant gap c of about 0.4 mm is provided between the optical function member 1 and the display unit 2. This is because, when the optical function member 1 and the display unit 2 are brought into direct contact with each other, pressure is directly applied to the display unit 2 and the screen bleeds. Particularly when the display unit is an LCD, the bleeding is remarkable due to the distortion of the liquid crystal layer. Preventing bleeding is indispensable.

[0004] However, if there is a gap between the optical function member and the display unit, reflection and scattering and absorption of light occur, and
The contrast, which is important as a display, is reduced to about 1/2, and problems such as reduced visibility, parallax at the time of input, and shadows on the display are caused.

[0005] For this reason, it is demanded that the optical function member and the display unit are directly bonded to each other so as not to form a gap, but an effective adhesive used for this bonding has not yet been obtained. In this case, if an epoxy resin-based adhesive known as an adhesive is used, since the adhesive layer is hard, when the optical function member is pressed, the pressing force is directly transmitted to the display unit as it is, causing bleeding. Cheap.
In addition, an epoxy resin-based adhesive or the like has poor wettability, and it is difficult to obtain a uniform adhesive layer.

The present invention has been made in view of the above circumstances,
When an optical function member such as an anti-reflection glass is directly joined to a display unit, the display unit has appropriate elasticity or cushioning property, provides good display properties as an optical function member integrated display device, and has transparency and adhesiveness. , An adhesive composition for an optical function member-integrated display device capable of forming an adhesive layer having excellent durability, an adhesive film and an adhesive film laminate formed from the composition, and an optical function member-integrated display It is an object to provide an apparatus and a method for manufacturing the same.

[0007]

Means for Solving the Problems and Embodiments of the Invention In order to achieve the above objects, the present invention provides the following adhesive composition for an optical function member integrated display device, an adhesive film, and an adhesive film laminate. And a display device integrated with an optical function member and a method of manufacturing the same. Claim 1: A heat and / or photo-curable adhesive composition for bonding the optical function member and the display unit of the optical function member-integrated display device in which the optical function member and the display unit are integrated, An adhesive composition for an optical-function-member-integrated display device, comprising, as a main component, a copolymer of ethylene, an acrylate-based and / or methacrylate-based monomer, and maleic acid and / or maleic anhydride. Claim 2: The adhesive composition according to claim 1, wherein 0.1 to 10 parts by mass of an organic peroxide is added to 100 parts by mass of the copolymer. Claim 3: The adhesive composition according to claim 1, wherein 0.1 to 10 parts by mass of a photosensitizer is added to 100 parts by mass of the copolymer. [4] The adhesive according to [1], wherein 0.1 to 10 parts by mass of a photosensitizer and 0.1 to 10 parts by mass of an organic peroxide are added to 100 parts by mass of the copolymer. Composition. [5] The adhesive composition according to [1], wherein 0.1 to 50 parts by mass of a plasticizer is added to 100 parts by mass of the copolymer. [6] The adhesive composition according to any one of [1] to [5], wherein 0.01 to 5 parts by mass of a silane coupling agent is added to 100 parts by mass of the copolymer. In a preferred embodiment, at least one selected from the group consisting of an acryloxy group-containing compound, a methacryloxy group-containing compound and an allyl group-containing compound is added in an amount of 0.1 to 100 parts by mass of the copolymer.
7. The method according to claim 1, wherein the addition is performed in an amount of from 50 to 50 parts by mass.
The adhesive composition according to Item. [8] The adhesive composition according to any one of [1] to [7], wherein 1 to 200 parts by mass of a hydrocarbon resin is added to 100 parts by mass of the copolymer. Claim 9: The content of the acrylate and / or methacrylate units in the copolymer is 1 to 50% by mass, and the content of the maleic acid and / or maleic anhydride units is 0.01.
The adhesive composition according to any one of claims 1 to 8, wherein the content is from 10 to 10% by mass. Claim 10: The strain (ε ₀ ) in the stress relaxation property of the adhesive composition is 5% (25 ° C.), and t = 0.05.
When the relaxation elastic modulus of (sec) is set to the initial value G ₀ , G ₀ is 6.
The relaxation time is equal to or less than 5 × 10 ⁶ Pa (6.5 × 10 ⁷ dyn / cm ² ) and is calculated by a relational expression lnG (t) = − t / τ + lnG ₀ obtained from a damping curve of the stress relaxation elastic modulus. The adhesive composition according to any one of claims 1 to 9, wherein τ (second) is 17 seconds or less. Claim 11: The optical function member is an antireflection treated glass,
The antireflection film, an antistatic glass, an antistatic film, an electromagnetic wave shielding material, a near-infrared absorbing film, and a color filter.
0. The adhesive composition according to any one of 0. [12] An adhesive film for an optical function member integrated type display device, wherein the adhesive composition according to any one of [1] to [11] is formed into a film. [13] The adhesive film according to [12], wherein the average roughness Ra of one or both surfaces of the film is less than 0.1 [mu] m. [14] The adhesive film for an optical-function-member-integrated display device according to [12], wherein the average roughness Ra on one or both surfaces of the film is 0.1 to 20 [mu] m. Claim 15: An adhesive film for an optical function member integrated type display device according to any one of Claims 12 to 14, and a release sheet releasably attached to one or both surfaces of the film. An adhesive film laminate for an optical function member-integrated display device, comprising: [16] The adhesive film laminate for an optical function member integrated display according to [15], wherein the release sheet is mainly composed of polyethylene terephthalate (PET). [17] An optical function wherein the optical function member and the display unit are bonded by a heat and / or light curing layer of the adhesive composition according to any one of [1] to [11]. Member-integrated display device. Claim 18: Interposing a layer of the adhesive composition according to any one of Claims 1 to 11 between the optical functional member and the display unit, and then curing the composition by heat and / or light. A method for manufacturing an optical function member integrated type display device characterized by the above-mentioned. Claim 19: Claim 12 between the optical function member and the display unit.
Or a method of manufacturing an optical function member integrated display device, comprising sandwiching the adhesive film according to 14, and then heating the film under reduced pressure to melt and cure the film. Claim 20: Claim 12 between the optical function member and the display unit.
Or a method for manufacturing an optical-function-member-integrated display device, comprising sandwiching the adhesive film according to 13 and then heating the film under pressure to melt and cure the film. Claim 21: Claim 12 between the optical function member and the display unit.
Or a method of manufacturing an optical function member integrated type display device, comprising sandwiching the adhesive film according to 13 and then passing the adhesive film through a hot roll provided with a preheating furnace to melt, press-bond and cure the film. Claim 22: Claim 12 between the optical function member and the display unit.
Or sandwich the adhesive film according to 13 and, after performing the adhesion using the self-adhesiveness of the film surface, temporarily press-bonded by pressing means, and heated under pressure to melt the film,
A method for manufacturing an optical function member integrated display device, characterized by curing. Claim 23: When interposing the layer of the adhesive composition according to any one of claims 1 to 11 between the optical function member and the display unit, or any one of claims 12 to 14
In any case when sandwiching the adhesive film described in the paragraph,
23. A volatile solvent is applied to at least one of the surface of the adhesive composition layer or the adhesive film, the optical function member in contact with the surface, and / or the adhesive surface of the display unit. Method for manufacturing an optical function member integrated type display device. In a twenty-fourth aspect, a layer of the adhesive composition according to any one of the first to eleventh aspects is interposed between the optical functional member and the display part, or any one of the twelfth to fourteenth aspects.
In any case when sandwiching the adhesive film described in the paragraph,
An ultraviolet-polymerizable liquid is applied to at least one of the surface of the adhesive composition layer or the adhesive film, the optical function member in contact with the surface, and / or the adhesive surface of the display unit, and the applied surface is irradiated with ultraviolet light. A method of manufacturing an optical function member integrated display device according to any one of claims 18 to 22.

The adhesive composition for a display device integrated with an optical function member of the present invention (hereinafter, simply referred to as an adhesive) is heat and / or photocurable, and using this adhesive, an antireflection treated glass or the like is used. When the optical function member and the display unit are directly joined to each other, it has a moderate elasticity or cushioning property, gives good display properties as an optical function member integrated type display device, and has excellent transparency, adhesion, and durability. An adhesive layer can be formed.

In this case, since the adhesive can be formed into a film, it can be easily and accurately bonded to an optical function member and a display device, and the handling property is improved.

Here, the above-mentioned adhesive film of the present invention comprises:
Although it has self-adhesiveness (surface tackiness), by selecting the roughness of the film surface, the self-adhesiveness is controlled, and the performance as an adhesive film becomes more prominent.

For example, when the average roughness Ra is less than 0.1 μm, the adhesion by bonding to the optical function member and the display portion is excellent, so that the operation such as adjusting the atmosphere at the time of bonding becomes unnecessary. Temporary pressure bonding can be stably performed only by employing appropriate pressing means. Further, when the average roughness Ra is 0.1 to 20 μm, the position can be easily adjusted at the time of bonding, and the bonding can be performed while avoiding the problem of deviation and peeling, and the handling property is dramatically improved.

Further, the adhesive film may be a laminate having a release sheet, and a sticky release sheet is adhered to one or both sides thereof so that the adhesiveness is maintained before use. In addition, contamination such as adhesion of dust can be avoided, handling properties are improved during use, and bonding work can be performed smoothly.

[0013] Further, the adhesive and the adhesive film include:
Since a uniform adhesive layer having a low elastic modulus and high flexibility can be obtained, excellent characteristics can be imparted as an adhesive for an optical function member integrated display device.

That is, by using the above-mentioned adhesive or the adhesive film (including the adhesive film obtained by peeling the release sheet from the above-mentioned laminate) when directly bonding the optical function member and the display section, the conventional technique can be used. Since it can be directly attached without providing a clearance via a spacer as well as having appropriate elasticity or cushioning property, it is a layer provided with excellent transparency, adhesion, and durability,
Attaching can be performed while avoiding problems such as reduced display contrast, reduced visibility, parallax at the time of input, and shadows on the display as much as possible. Can be easily performed while suppressing distortion of the liquid crystal layer.

Further, according to the optical function member-integrated display device of the present invention, since the excellent adhesive layer is interposed as described above, a gap is formed between the optical function member and the display unit as in the prior art. It is not necessary to provide, the problem of the decrease in contrast, the decrease in visibility, the problem of parallax at the time of input, the shadow of the display, etc. are solved, and also has an appropriate elasticity or cushioning property.
Even if the optical function member and the display unit are directly joined, the display device can be a robust optical function member-integrated display device having good display properties without causing a problem of bleeding due to pressing of the member.

Further, in the present invention, the adhesive used when manufacturing the optical function member integrated display device,
The production method can be selected according to the physical properties of the adhesive film (including the adhesive film used by peeling the release sheet from the laminate).

In this case, for example, the average roughness Ra is 0.1
In order to obtain a display device using an adhesive film having a thickness of less than μm, the adhesive film is sandwiched between the display unit and the optical function member, and temporarily pressed by an appropriate pressing means, and the film is melted and cured. Preferably, when a film is sandwiched between display portions or the like, the self-adhesiveness of the film is utilized to the utmost, and the film can be stuck with good adhesiveness. Therefore, the above-described excellent display device can be manufactured.

The average roughness Ra is 0.1 to 20 μm.
When an adhesive film is used, it is preferably sandwiched between the display unit and the optical function member in the same manner as the above-described film, and the film is held under reduced pressure to adhere to the film, then melted, and preferably cured. At the time of alignment, it is possible to use an adhesive film with low tackiness to place it at the optimal position for the display unit, etc. It is possible to form a uniform adhesive layer without defects such as air traps without leaving surface roughness.

Hereinafter, the present invention will be described in more detail.

The adhesive of the present invention is a curable adhesive which is cured by heat and / or light and contains a copolymer of ethylene, acrylate and / or methacrylate monomers and maleic acid and / or maleic anhydride as essential components. Agent.

Here, the copolymer of ethylene, an acrylate-based and / or methacrylate-based monomer, and maleic acid and / or maleic anhydride, which are the main components of the adhesive used in the present invention, has reactivity during curing, From the viewpoint of flexibility and durability after curing, the content of the acrylate and / or methacrylate units is preferably 1 to 50% by mass, and more preferably 1 to 40% by mass. Further, the content of maleic acid and maleic anhydride units is preferably from 0.01 to 10% by mass, particularly preferably from 0.05 to 5% by mass.

The acrylate monomer and methacrylate monomer include acrylic acid, methacrylic acid,
These esters and the like can be mentioned, and specifically, (meth)
In addition to lower alkyl (meth) acrylates such as methyl acrylate and ethyl (meth) acrylate, (meth)
Glycidyl acrylate and the like are exemplified.
The species may be used alone, or two or more species may be used in combination.

For curing the adhesive of the present invention, an organic peroxide and / or a photosensitizer can be used, but when the curable adhesive is a thermosetting adhesive, it is usually used. When an organic peroxide is used and the curable adhesive is a photocurable adhesive, a photosensitizer is usually used. Also,
When the curable adhesive imparts the properties of both a thermosetting adhesive and a photocurable adhesive, an organic peroxide and a photosensitizer can be used in combination.

Here, as the organic peroxide added for curing the adhesive of the present invention, those which decompose at a temperature of 70 ° C. or more to generate radicals can be suitably used. It is preferable that the decomposition temperature with a half-life of 10 hours is 50 ° C. or higher, and it can be selected in consideration of adhesive preparation conditions, film-forming temperature, curing (bonding) conditions, storage stability of the adhesive, and the like.

Examples of usable organic peroxides include, for example, 2,5-dimethylhexane-2,5-dihydroxy peroxide; 2,5-dimethyl-2,5-di (t
-Butylperoxy) hexyne-3; di-t-butyl peroxide; t-butylcumyl peroxide;
5-dimethyl-2,5-di (t-butylperoxy) hexane; dicumyl peroxide; α, α'-bis (t
-Butylperoxyisopropyl) benzene; n-butyl-4,4-bis- (t-butylperoxy) valerate; 2,2-bis (t-butylperoxy) butane;
1,1-bis (t-butylperoxy) cyclohexane; 1,1-bis (t-butylperoxy) -3,3,3
5-trimethylcyclohexane; t-butyl peroxybenzoate; benzoyl peroxide; t-butyl peroxy acetate; methyl ethyl ketone peroxide; t-butyl hydroperoxide; p-menthane hydroperoxide; hydroxyheptyl peroxide; chlorohexanone peroxide Octanoyl peroxide; decanoyl peroxide; lauroyl peroxide; cumyl peroxy octoate; succinic acid peroxide; acetyl peroxide; t-butyl peroxy (2-ethylhexanoate); Oxide; benzoyl peroxide; t-butylperoxyisobutyrate; 2,4-dichlorobenzoyl peroxide; Curing temperature, time, may be appropriately blended according to the physical properties that.

As the organic peroxide, one of these is used.
Species can be used alone or as a mixture of two or more,
It is recommended that the addition amount is usually 0.1 to 10 parts by mass, particularly 0.2 to 2.0 parts by mass with respect to 100 parts by mass of the copolymer. If the amount is too small, sufficient curing for durability cannot be obtained. If the amount is too large, unreacted products and by-products after curing increase, and the performance may be deteriorated.

On the other hand, when the adhesive is photocured,
A photosensitizer can be added. As the photosensitizer, a radical photopolymerization initiator is suitably used.

Here, as a radical photopolymerization initiator, for example, as a hydrogen abstraction initiator, benzophenone, methyl orthobenzoyl benzoate, 4-benzoyl-4'-methyldiphenyl sulfide, isopropylthioxanthone, diethylthioxanthone, ethyl- 4
-(Diethylamino) -benzoate and the like are used.
Among radical photopolymerization initiators, examples of intramolecular cleavage initiators include benzoin ether and benzyldimethyl ketal, and α-hydroxyalkylphenones include 2-hydroxy-2-methyl-1-phenylpropan-1-one, -Hydroxycyclohexyl phenyl ketone, alkyl phenyl glyoxylate, diethoxy acetophenone and the like can be used. Further, as an α-aminoalkylphenone type, 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropane-1,2-
Benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butanone-1 and the like, and acylphosphine oxide and the like are used, and are appropriately blended according to the spectral characteristics, intensity, and physical properties of the light source. .

As the photosensitizer, at least one of them can be used alone or in combination of two or more. Usually, 0.1 to 10 parts by mass is added to 100 parts by mass of the copolymer. It is preferable to use
It is recommended to be parts by weight. If the amount is small, sufficient curing for durability may not be obtained. If the amount is large, unreacted substances and by-products after curing increase, and the performance may be deteriorated.

When the organic peroxide and the photosensitizer are used in combination, the above-mentioned organic peroxides and photosensitizers can be used respectively.

When the organic peroxide and the photosensitizer are used in combination, the amount thereof is based on 100 parts by mass of the copolymer.
0.1 to 10 parts by mass of a photosensitizer, particularly 0.2 to 2.0 parts by mass, and 0.1 to 10 parts by mass of an organic peroxide, particularly 0.2
It is recommended to be 2.0 parts by mass.

The adhesive of the present invention can suitably contain a plasticizer. By adding a plasticizer, workability can be improved, and suitable stress relaxation characteristics described later can be easily imparted.

Here, specific examples of the plasticizer include phthalic acid esters such as dimethyl phthalate, diethyl phthalate, dibutyl phthalate, dihexyl phthalate, dioctyl phthalate, di-2-ethylhexyl phthalate, tricresyl phosphate, and trimethyl phthalate. Phosphates such as octyl phosphate and triphenyl phosphate, adipates such as dioctyl adipate, diisooctyl adipate, di-n-octyl adipate, sebacates such as dibutyl sebacate and dioctyl sebacate, dioctylase And azelaic acid esters such as dihexyl azelate; citrates such as triethyl citrate and acetyl triethyl citrate; methyl phthalyl ethyl glycolate and ethyl phthalyl ester. Glycol esters of glycolate etc., trioctyl trimellitate, tri -n
Trimellitic acid esters such as -octyl-n-decyl trimellitate; phthalic acid isomers such as dioctyl isophthalate and dioctyl terephthalate; ricinoleic acid esters such as methyl acetyl ricinolate and butyl acetyl ricinolate; and polypropylene adipate And epoxidized soybean oil, epoxys such as epoxybutyl stearate, other chlorinated paraffins, chlorinated fatty acid esters, and the like. Particularly, phthalic esters such as dioctyl phthalate, dioctyl adipate, etc. And adipic esters of the formula (1).

The amount of the plasticizer to be added depends on the amount of the copolymer 1
0.1 to 50 parts by mass, especially 1.
It is preferable to mix 0 to 20 parts by mass. If the amount is small, sufficient workability and stress relaxation properties may not be improved.If the amount is large, workability may be impaired. Reliability such as heat resistance may be reduced.

Further, a silane coupling agent can be added to the adhesive of the present invention as an adhesion promoter. Examples of the silane coupling agent include vinyltriethoxysilane, vinyltris (β-methoxyethoxy) silane, γ-methacryloxypropyltrimethoxysilane,
Vinyltriacetoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, β- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, γ-chloropropylmethoxysilane, vinyltrichlorosilane , Γ-mercaptopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, N-β (aminoethyl) -γ-aminopropyltrimethoxysilane and the like.
The species can be used alone or as a mixture of two or more. It is recommended that the addition amount of these silane coupling agents is usually 0.01 to 5 parts by mass, particularly 0.1 to 3.0 parts by mass, based on 100 parts by mass of the copolymer. In this case, if the amount is too small, adhesion failure may occur.

Further, an epoxy group-containing compound can be similarly added to the adhesive of the present invention for the purpose of promoting adhesion and curing. Examples of the epoxy group-containing compound include triglycidyl tris (2-hydroxyethyl) isocyanurate; neopentyl glycol diglycidyl ether; 1,6-hexanediol diglycidyl ether;
Acrylic glycidyl ether; 2-ethylhexyl glycidyl ether; phenyl glycidyl ether; phenol glycidyl ether; pt-butylphenyl glycidyl ether; diglycidyl adipic ester;
Diglycidyl phthalate; glycidyl methacrylate; butyl glycidyl ether, and the like. At least one of these epoxy group-containing compounds can be added alone or in combination of two or more. The same effect can be obtained by adding an oligomer having an epoxy group and having a molecular weight of hundreds to thousands or a polymer having a weight average molecular weight of thousands to hundreds of thousands.

The addition amount of these epoxy group-containing compounds is as follows:
It is generally recommended that the amount be 0.1 to 20 parts by mass, especially 1 to 10 parts by mass, based on 100 parts by mass of the copolymer.

Further, various physical properties (adhesiveness,
An acryloxy group, methacryloxy group or allyl group-containing compound can be added for the purpose of further improving the mechanical strength, heat resistance, wet heat resistance, weather resistance, etc.) or accelerating the curing of the adhesive.

As the compound used for this purpose, acrylic acid or methacrylic acid derivatives, for example, esters and amides thereof are most common. In this case, as an ester residue, in addition to an alkyl group such as methyl, ethyl, dodecyl, stearyl, lauryl, a cyclohexyl group, a tetrahydrofurfuryl group, an aminoethyl group,
-Hydroxyethyl group, 3-hydroxypropyl group, 3
-Chloro-2-hydroxypropyl group. Esters of acrylic acid or methacrylic acid with polyfunctional alcohols such as ethylene glycol, triethylene glycol, polyethylene glycol, glycerin, trimethylolpropane, and pentaerythritol are also used. A typical amide is acrylamide. Examples of the allyl group-containing compound include triallyl cyanurate, triallyl isocyanurate, diallyl phthalate, diallyl isophthalate, diallyl maleate, and the like, and one or a mixture of two or more of the above copolymers is used. 0.1 to 50 parts by mass, preferably 0.5 to 20 parts by mass, per 100 parts by mass. When the amount is less than 0.1 part by mass, the heat resistance, the effect of improving the mechanical strength may be reduced, and when the amount is more than 50 parts by mass, workability and film forming property during preparation of the adhesive may be reduced. .

In addition, a hydrocarbon resin can be added to the adhesive of the present invention for the purpose of improving processability such as processability and bonding. In this case, the hydrocarbon resin to be added may be either a natural resin or a synthetic resin. In the case of natural resin, rosin, rosin derivative, and terpene resin are preferably used. As the rosin, a gum resin, a tall oil resin, a wood resin, or the like can be used. As the rosin derivative, rosin obtained by hydrogenation, heterogeneization, polymerization, esterification, and metal salification can be used. As the terpene-based resin, terpene-based resins such as α-pinene and β-pinene, as well as terpene phenol resins and the like can be used. Also, dammar, corval, and shellac may be used as other natural resins. On the other hand, in the case of a synthetic resin, a petroleum resin, a phenol resin, a xylene resin, or the like is suitably used. As petroleum resins, aliphatic petroleum resins, aromatic petroleum resins,
Alicyclic petroleum resins, copolymer petroleum resins, hydrogenated petroleum resins, pure monomer petroleum resins, cumarone indene resins, and the like can be used. As the phenolic resin, an alkylphenol resin, a modified phenol resin, or the like can be used. As the xylene-based resin, a xylene resin, a modified xylene resin, or the like can be used.

The amount of the hydrocarbon resin to be added is appropriately selected, but is preferably from 1 to 200 parts by mass, more preferably from 5 to 150 parts by mass, per 100 parts by mass of the copolymer. .

Further, in the present invention, other than the above, an adhesion promoter, an antioxidant (a polymerization inhibitor, an antioxidant, an ultraviolet absorber, etc.), and other inorganic or organic fillers may be used as long as the object is not impaired. An agent may be added. In addition, inorganic,
An effective amount of a conventionally known halogen-based or phosphorus-based flame retardant can be added. Aluminum hydroxide, antimony trioxide, antimony pentoxide, guanidine sulfamate, guanidine phosphate, guanine urea phosphate, magnesium hydroxide as inorganic flame retardants, chlorinated paraffin, tetrabromobisphenol as halogen flame retardants A, decabromodiphenyl oxide, hexabromocyclododecane, octabromodiphenyl ether, 1,
2-bis (tribromophenoxy) ethane, ethylenebistetrabromophthalimide, pentabromobenzyl polyacrylate, tris (2,3-dibromopropyl-
1) As isocyanurate and phosphorus-based flame retardants, triphenyl phosphate, leophos triallyl phosphate, octyl cresyl diphenyl phosphate,
Tricresyl phosphate and the like.

The adhesive of the present invention can be obtained by uniformly mixing the above-mentioned copolymer and the above-mentioned additives and kneading them with an extruder, a roll or the like. Particularly, the physical properties of the adhesive composition Increased the strain (ε ₀ ) in the stress relaxation property by 5% (25%).
° C), and the relaxation modulus at t = 0.05 (sec) is set to the initial value G.
_{If 0} , G ₀ is 6.5 × 10 ⁶ Pa (6.5 × 10 ⁷
dyn / cm ² ) or less, especially 4.0 × 10 ^{6 to} 6.5 × 1
It is recommended to be 0 ⁶ Pa, and if it exceeds 6.5 × 10 ⁶ Pa, the dynamic distortion applied to the bonded product of the LCD panel and the transparent member cannot be eliminated, and in particular, the LCD panel may be easily broken. . If it is less than 4.0 × 10 ⁶ Pa, the mechanical strength after bonding may be insufficient, and the heat resistance may be reduced.

Further, in the present invention, the relational expression lnG (t) = − t obtained from the above-mentioned decay curve of the stress relaxation elastic modulus.
It is recommended that the relaxation time τ (seconds) calculated by / τ + lnG ₀ be 17 seconds or less, particularly 7 to 12 seconds. By optimizing the relaxation time in this way, L
Distortion between the CD panel and the CD panel can be reduced, and the occurrence of color unevenness on the display screen of the display device can be reliably prevented. In this case, if the relaxation time exceeds 17 seconds, static distortion cannot be relaxed, and color unevenness may easily occur.

The adhesive of the present invention comprises a calender, a roll,
It can be formed into a film by a film forming method such as T-die extrusion and inflation. In this case, although the thickness of the film to be formed is appropriately selected, it is usually 50 to 1000.
μm, particularly preferably 50 to 500 μm.

The curing conditions of the adhesive and the adhesive film of the present invention (including the adhesive film obtained by peeling the release sheet from the laminate) are used when thermosetting using an organic peroxide. Although it depends on the type of the organic peroxide, it is usually 70 to 170 ° C, especially 2 to 6 at 70 to 150 ° C.
It is preferably 0 minutes, especially 5 to 30 minutes. In this case, the curing is preferably 0.01 to 50 kgf / cm ² ,
In particular, it is recommended to carry out under a pressure condition of 0.1 to 20 kgf / cm ² .

In the case of photocuring using a photosensitizer,
Many light sources that emit light in the ultraviolet to visible range can be adopted as the light source, for example, ultra-high pressure, high pressure, low pressure mercury lamp, chemical lamp, xenon lamp, halogen lamp, mercury halogen lamp, carbon arc lamp, incandescent lamp, laser light, etc. Can be The irradiation time cannot be determined unconditionally depending on the type of lamp and the intensity of the light source, but is about several tens of seconds to several tens of minutes.

When an organic peroxide and a photosensitizer are used in combination, the above conditions can be appropriately adjusted depending on the ingredients.

In the present invention, the film formed by the film formation has self-adhesiveness (surface tackiness), but by selecting the roughness of the film surface,
The self-adhesiveness is controlled, and the performance as an adhesive film can be made more conspicuous.

That is, in the film of the present invention, the average roughness Ra is less than 0.1 μm, preferably 0 to 0.1 μm.
When the surface is close to a mirror surface of less than m, the surface tackiness is improved, so that when bonding with an optical function member or a display device, excellent adhesion is provided, and operations such as adjusting the pressure atmosphere at the time of bonding are performed. Is unnecessary, and the temporary press-bonding can be stably performed only by employing an appropriate pressing means.

On the other hand, when the average roughness Ra of the film of the present invention is 0.1 to 20 μm, especially 1 to 15 μm, the surface tackiness can be reduced, the position can be easily adjusted at the time of lamination, and the problem of displacement and peeling can be obtained. Can be avoided and bonding can be performed, and handling properties can be dramatically improved. When the average roughness is too coarse, when the film is heated and melted, if the fluidity of the adhesive is low, the emboss may remain undissolved, and the transparency may be reduced or the uniformity of the adhesive layer may be impaired. is there. In order to obtain the above average roughness, it is effective to further perform fine unevenness (embossing) on the surface during the production of the above-described film, and a known method can be employed. Transfer method using an embossed film having the following.

In the present invention, the adhesive film is
It can be a laminate comprising a release sheet regardless of the difference in surface roughness, and by sticking a release sheet on one or both sides in a releasable manner, the adhesiveness is maintained before use In addition, contamination such as adhesion of dust can be avoided, and the handleability during use is improved, and the bonding operation can be performed smoothly. In particular, the surface roughness is 0.1 μm
For a film having a thickness of less than 1, the embodiment as a laminate is preferable, and handling properties are remarkably improved.

In this case, examples of the release sheet include those mainly composed of, for example, polyethylene terephthalate (PET), polyethylene (PE), and polypropylene (PP), and PET is particularly preferred.

The film laminate provided with the release sheet
The adhesive composition can be produced according to a conventional method. For example, the adhesive composition can be produced by shooting with a calender, an extruder, a press, or the like, and attaching a release sheet prepared in advance in a molten state. Also,
A method of dissolving the adhesive composition with a good solvent such as toluene, casting the film on a release sheet to form a film, and further laminating the release sheet on the formed surface can also be mentioned.

Next, the optical function member-integrated display device of the present invention has an adhesive layer formed of the above-mentioned adhesive or adhesive film of the present invention. As shown in FIG. The adhesive or the adhesive film 10 is interposed between the display unit 2 and the display unit 2, and can be obtained by curing.

Here, as the optical functional member of the present invention,
Conventionally known ones can be used, for example, light-transmissive anti-reflection treated glass, anti-reflection treated film, anti-static glass, anti-static film, electromagnetic wave shielding material, near-infrared absorbing film, color filter, etc. are preferably used. can do. Also, as a display unit, CRT, LC
A known structure such as D can be used.

When the optical function member integrated display device of the present invention is manufactured, the adhesive or the adhesive film (an adhesive obtained by peeling the release sheet from the adhesive film laminate) is provided between the optical function member and the display section. (Including a film), and the above member is attached. In this case, a manufacturing method according to the dosage form can be adopted.

Therefore, for example, when an adhesive as the above composition is used, the copolymer and each additive are uniformly mixed with a desired optical function member and a solvent which does not affect the display portion. It is possible to adopt a method of dissolving, adjusting as a solution type adhesive, uniformly applying to the surface of a predetermined optical function member and the display unit, temporarily compressing, and then heating and bonding and curing.

In the present invention, when the above-described device is manufactured using an adhesive film, the shape is adjusted according to the size of the optical function member and the display unit, and the adhesive film surface is formed between the optical function member and the display unit. The optical function member and the display unit are disposed so as to be interposed in the optical function member. When the laminate is used for bonding, except that the release sheet is peeled off before being used and then used, it is the same as the case where the adhesive film is used alone. And

Here, the conditions for laminating the adhesive film of the present invention are not particularly limited, and the bonding can be performed in any atmosphere under normal pressure, reduced pressure, or increased pressure. It is preferable to select an atmosphere according to the average roughness of the agent film.

That is, when a film having an average roughness of 0.1 to 20 μm is used, the tackiness is low. Therefore, after the display unit or the like is attached, the attached body is placed in a vacuum chamber.
It is recommended to reduce the pressure inside this to remove air existing between the film and the member. In this case, for example, the adhesive body is inserted into a highly flexible bag having tight sealing properties,
Then, a method of sucking air from the bag with a vacuum pump or the like to deaerate the bag can be adopted, whereby the bag comes into close contact with the attached body inside the bag, and the entire attached body is pressurized by the bag. In addition,
This method is suitably adopted for a film having an average roughness of 0.1 to 20 μm.
In the case of a film having a thickness of less than m, the tackiness is high, so that an air passage is blocked, and the inside of the film cannot be sufficiently deaerated. Also, in the case of a film having an average roughness of more than 20 μm, deaeration cannot be sufficiently performed, and the surface roughness may eventually remain.

Here, an example of the above attaching method will be described with reference to the drawings. FIG. 2 shows a laminate 3 in which release sheets 11 (made of PET) are attached to both sides of an adhesive film 10. When bonding the LCD panel and the optical function member using the laminate 3, first, the release sheet 11 on one surface of the film 10 is peeled off, and the exposed adhesive film 1 is removed.
The LCD panel 12 is attached to the surface of the LCD panel 0 as shown in FIG. Similarly, the release sheet 11 on the other surface of the adhesive film 10 is peeled off, and the optical function member 13 is attached to the exposed surface of the adhesive film 10 as shown in FIG. Then, the treatment is performed under the reduced pressure.
Although not shown in the drawings, the surface of the film 10 is formed with irregularities by embossing, and the tackiness of the film 10 itself is low. Is done.

The adhesion of the film is performed by heating the film to a temperature of about 50 to 100 ° C. using a heating furnace such as a hot-air circulating furnace while removing air between the film and the member with a vacuum pump or the like.
This is performed by melting and further curing the film (adhesive).

In this case, if necessary, after adhesion under reduced pressure, pressure can be applied as a separate step at a pressure of about 1 to 10 kgf / cm ² by using a device capable of heating and pressing such as an autoclave. When a bag is used, the pressure-sensitive adhesive body does not necessarily need to be pressurized because the inside of the bag is in a vacuum state and pressed by the bag.

On the other hand, when a film having an average roughness of less than 0.1 μm and close to a mirror surface is used, the tackiness of the film itself is high, so that it is preferable to attach the display section or the like under normal pressure. If other conditions such as under reduced pressure are adopted,
Since it adheres immediately after bonding, air may be left inside, and the air passage may be blocked, and sufficient deaeration may not be performed. After bonding the adhesive film, it is recommended to perform temporary press-fitting by a pressing means such as a suitable press machine or roller. In addition, at the time of this temporary press-bonding, air residue may be present at the interface, but even in such a case, the adhesive is temporarily dissolved and flowed by introducing the mixture into the autoclave, and the air at the interface is then removed. Disappears.

Then, the film is put into a heating furnace such as a hot air circulating furnace while the above-mentioned bonding is performed, and the film and the member are brought into close contact with each other by the weight of the optical function member itself.
The film is heated to about 100 ° C. to melt the film and preliminarily pressed, and then heated at a pressure of about 1 to 10 kgf / cm ² using a device capable of heating and pressing such as an autoclave.
Heating and pressurizing can be performed at about 100 ° C.

In this case, after the above-mentioned film is interposed between the members, the film is passed through a heat roll provided with a preheating furnace immediately before being melted and temporarily pressed, and then heated and pressed by an autoclave or the like. It is also possible to heat and press at about 50 to 100 ° C. at a pressure of about 1 to 10 kgf / cm ² using a device capable of performing the above steps.

In the present invention, in the above-mentioned production method, the surface of the adhesive or the adhesive film, the optical functional member in contact with the surface, and / or the display, regardless of whether the adhesive or the adhesive film is sandwiched. It is recommended that a volatile solvent be applied to at least one of the bonding surfaces of the part in order to improve the wettability between different kinds of members, prevent air bubbles from entering, and increase the adhesion of the bonding portion.

Here, volatile solvents that can be used include:
Examples thereof include those that volatilize by themselves after application and those that volatilize by drying treatment. Specific examples include low-boiling alkanes such as pentane, hexane, heptane, and cyclohexane; and aromatic compounds such as benzene, toluene, and xylene. Hydrocarbons, alcohols such as methanol and ethanol, chlorinated solvents such as chloroform, dichloroethane and trichloroethane, fluorine-based solvents such as trichlorofluoroethane, ketones such as acetone, methyl ethyl ketone and methyl isobutyl ketone, methyl acetate, ethyl acetate and acetic acid One selected from acetates such as propyl and butyl acetate, dimethyl ether, methyl ethyl ether, diethyl ether and the like can be used alone or in combination of two or more.

In the present invention, instead of applying the above-mentioned volatile solvent, an ultraviolet-polymerizable liquid may be applied in the same manner to improve wettability between different kinds of members and prevent air bubbles from being mixed. In addition, it is possible to enhance the adhesiveness of the bonding portion, and particularly to improve the visibility.

Here, as the UV-polymerizable solution, a solution exhibiting UV-polymerizability such as a photopolymerization initiator that generates radicals or the like upon irradiation with ultraviolet light can be used by dissolving it in an appropriate solvent. It is preferable to use a photopolymerizable solution which rapidly completes the reaction and is cured by irradiation with ultraviolet rays.

Specifically, radicals are generated by irradiation with monomers such as acrylic esters and methacrylic esters, and oligomers such as urethane (meth) acrylate, epoxy (meth) acrylate and polyester (meth) acrylate. And a mixture of various photopolymerization initiators. In this case, the wettability can be further improved by adding a highly volatile solvent or the like in order to further improve the adhesion at the bonding interface.

The above-mentioned method using a volatile solvent or an ultraviolet-polymerizable liquid can be carried out by an appropriate method such as a dropping method, a spraying method and a coating method. When a volatile solvent is used, the solution can be left standing or dried, and when a UV-polymerizable liquid is used, it can be used after application by irradiating ultraviolet rays by a known method.

[0074]

According to the present invention, it is possible to easily and reliably obtain an optical-function-member-integrated display device having good display properties.

[0075]

The present invention will be described below in more detail with reference to Examples, but the present invention is not limited to the following Examples.

Example 1 The formulations shown in Table 1 were dissolved in toluene, and dried on a PET release sheet having been subjected to embossing (Ra = 2.5 μm) and release treatment to a dry thickness of 100 μm.
m. After drying, another similar PET release sheet was laminated, and the adhesive film 1 shown in FIG.
0 was obtained. In FIG. 5, reference numeral 14 denotes a PET release sheet that has been subjected to embossing and release processing.

Next, after cutting the laminated body to the size of the anti-reflection treated glass, the PET release sheets on both sides were peeled off, and an adhesive film having embosses on both sides was placed between the anti-reflection treated glass and the LCD. Then, it is put into a flexible airtight bag, the air in the bag is sucked out by a vacuum pump, and then heat treated at 80 ° C. for 1 hour, whereby the antireflection treated glass and the LCD are integrated. The optical function member integrated display device was obtained.

[0078]

[Table 1]

Example 2 The same composition as in Example 1 was sheeted by a calendar, embossed on both sides with an embossing roll, and an adhesive film having a dry thickness of 100 μm and an embossment of Ra = 10.0 μm on both sides was obtained. Obtained.

This was cut into the same size as the anti-reflection treated glass, then sandwiched between the anti-reflection treated glass and the LCD as in Example 1, and the laminate was placed in a hot air circulating furnace at 80 ° C. for 30 minutes. did. Next, the thus preliminarily pressure-bonded product was placed in an autoclave at 80 ° C. and 5 kgf / cm ^2.
By heating and pressurizing for 30 minutes under the conditions described above, an optical function member integrated display device in which the antireflection treated glass and the LCD were integrated was obtained.

Each of the display devices with an integrated optical function member of the above embodiment has improved contrast and parallax as compared with the conventional display device with an integrated optical function member having a gap between the optical function member and the LCD. I couldn't feel it.

Example 3 The composition shown in Table 2 was used to prepare a mixture having a diameter of 8
mm and a height of 6 mm, and measured with a rheometer (RDS-II) manufactured by Rheometrics at 25 ° C. with a strain of 5%. The initial value of the relaxation modulus G ₀ (t = 0.05 (sec)) is 6.0 × 10 ⁶
At Pa, the relaxation time τ was 13 seconds.

On the other hand, the formulations shown in Table 2 were sheeted by a calender to form an adhesive film having a thickness of 500 (μm). When the average roughness Ra of the formed film was measured, it was 0.05 (μm). As shown in FIG. 2, a PET release sheet was laminated on both surfaces of the adhesive film to obtain an adhesive film laminate.

[0084]

[Table 2]

An optical device was manufactured using the above adhesive film laminate.

First, the above adhesive film laminate was cut into a predetermined LCD (display section) panel size with the release sheet adhered.

Next, one of the PET release sheets of the laminate was peeled off, and an LCD panel was attached to the exposed adhesive film surface. Similarly, an acrylic plate (optically functional member) having been subjected to an anti-reflection treatment was overlapped on the other film surface, and then temporarily pressed by a roll laminator. At this time, the self-adhesiveness of the adhesive film is utilized,
Temporary fixing between the panel and the acrylic plate was successfully performed only by temporary crimping.

Further, the adhesive film temporarily compressed was placed in an autoclave under the conditions of 80 ° C. and 5 kgf / cm ² .
Heat and press for 1 hour, apply L to acrylic plate for anti-reflection treatment
An optical member-integrated display device with an integrated CD panel was manufactured.

It was confirmed that the obtained optical-function-member-integrated display device had no problem such as uneven color of the display screen and had a good display surface.

Example 4 The same procedure as in Example 1 was carried out except that the compositions shown in Table 2 were used, and after performing sheeting with a calender, embossing was performed on both sides with an embossing roll. = 10.0μ
An adhesive film having an emboss of m was obtained.

After cutting this into the same size as the anti-reflection treated glass, it was sandwiched between the anti-reflection treated glass and the LCD as in Example 1, and this laminate was put into a hot air circulating furnace at 80 ° C. for 30 minutes. did. Next, the thus preliminarily pressure-bonded product was placed in an autoclave at 80 ° C. and 5 kgf / cm ^2.
By heating and pressurizing for 30 minutes under the conditions described above, an optical function member integrated display device in which the antireflection treated glass and the LCD were integrated was obtained.

Each of the display devices with an integrated optical function member of the above embodiment has improved contrast and parallax as compared with the conventional display device with an integrated optical function member having a gap between the optical function member and the LCD. I couldn't feel it.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one embodiment of an optical function member integrated display device of the present invention.

FIG. 2 is a sectional view showing one embodiment of the adhesive film laminate of the present invention.

FIG. 3 shows a display portion (L) on the adhesive film laminate shown in FIG.
FIG. 4 is an explanatory diagram showing a state where CD) is attached.

FIG. 4 is an explanatory view showing a state in which an optical function member is attached to the adhesive film laminate shown in FIG. 2;

FIG. 5 is a cross-sectional view illustrating an example of a method for obtaining an adhesive film laminate having an emboss.

FIG. 6 is a cross-sectional view of a conventional optical function member integrated display device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Optical functional member 2 Display part 10 Adhesive film 11 Release embossed PET release sheet

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G09F 9/00 310 G09F 9/00 310 313 313

Claims (24)

[Claims] 1. A heat and / or photo-curable adhesive composition for bonding the optical function member and the display unit of an optical function member integrated display device in which the optical function member and the display unit are integrated. An adhesive composition for an optical-function-member-integrated display device, comprising, as a main component, a copolymer of ethylene, an acrylate-based monomer and / or a methacrylate-based monomer, and maleic acid and / or maleic anhydride. 2. The adhesive composition according to claim 1, wherein 0.1 to 10 parts by mass of an organic peroxide is added to 100 parts by mass of the copolymer. 3. The adhesive composition according to claim 1, wherein 0.1 to 10 parts by mass of a photosensitizer is added to 100 parts by mass of the copolymer. 4. A photosensitizer of 0.1 to 10 parts by mass and an organic peroxide of 0.1 to 1 part by mass per 100 parts by mass of the copolymer.
The adhesive composition according to claim 1, wherein 0 parts by mass is added. 5. The adhesive composition according to claim 1, wherein 0.1 to 50 parts by mass of a plasticizer is added to 100 parts by mass of the copolymer. 6. The adhesive composition according to claim 1, wherein 0.01 to 5 parts by mass of a silane coupling agent is added to 100 parts by mass of the copolymer. 7. The method according to claim 1, wherein at least one selected from the group consisting of an acryloxy group-containing compound, a methacryloxy group-containing compound and an allyl group-containing compound is added in an amount of 0.1 to 50 parts by mass to 100 parts by mass of the copolymer. The adhesive composition according to any one of claims 1 to 6. 8. The adhesive composition according to claim 1, wherein 1 to 200 parts by mass of a hydrocarbon resin is added to 100 parts by mass of the copolymer. 9. The copolymer has a acrylate-based and / or methacrylate-based unit content of 1 to 50% by mass and a maleic acid and / or maleic anhydride unit content of 0.
The adhesive composition according to any one of claims 1 to 8, wherein the content is from 0.01 to 10% by mass. 10. The strain (ε ₀ ) in the stress relaxation characteristic of the adhesive composition is 5% (25 ° C.), and t = 0.05.
When the relaxation elastic modulus of (sec) is set to the initial value G ₀ , G ₀ is 6.
The relaxation time is equal to or less than 5 × 10 ⁶ Pa (6.5 × 10 ⁷ dyn / cm ² ) and is calculated by a relational expression lnG (t) = − t / τ + lnG ₀ obtained from a damping curve of the stress relaxation elastic modulus. The adhesive composition according to any one of claims 1 to 9, wherein τ (second) is 17 seconds or less. 11. The optical function member is selected from an anti-reflection treated glass, an anti-reflection treated film, an anti-static glass, an anti-static film, an electromagnetic wave shielding material, a near-infrared absorbing film, and a color filter. The adhesive composition according to any one of the above. 12. An adhesive film for an optical function member-integrated display device, wherein the adhesive composition according to claim 1 is formed in a film shape. 13. The average roughness R of one or both sides of a film
The adhesive film for an optical function member integrated display device according to claim 12, wherein a is less than 0.1 µm. 14. The average roughness R on one or both sides of the film
The adhesive film for an optical function member-integrated display device according to claim 12, wherein a is 0.1 to 20 µm. 15. The adhesive film for an optical function member-integrated display device according to claim 12, wherein:
And a release sheet that is releasably attached to one or both surfaces of the film. 16. The adhesive film laminate for an optical function member-integrated display device according to claim 15, wherein the release sheet mainly comprises polyethylene terephthalate (PET). 17. The optical function member and the display unit according to claim 1,
The heat and / or heat of the adhesive composition according to any one of claims 1 to 11,
Alternatively, an optical function member integrated display device, which is bonded by a photocurable layer. 18. A layer of the adhesive composition according to claim 1, which is interposed between the optical function member and the display section, and the composition is cured by heat and / or light. A method for manufacturing an optical function member integrated type display device, characterized in that: 19. An optical device comprising: an adhesive film according to claim 12 sandwiched between an optical function member and a display portion; and heating under reduced pressure to melt and cure the film. A method for manufacturing a functional member integrated display device. 20. An optical device comprising: an adhesive film according to claim 12 sandwiched between an optical function member and a display portion; and heating under pressure to melt and cure the film. A method for manufacturing a functional member integrated display device. 21. An adhesive film according to claim 12 or 13 sandwiched between an optical function member and a display portion, and then passed through a heat roll provided with a preheating furnace to melt and press-bond the film, thereby curing the film. A method of manufacturing an optical function member integrated display device, comprising: 22. An adhesive film according to claim 12 or 13 is sandwiched between the optical function member and the display section, and the adhesive film is attached by utilizing the self-adhesiveness of the film surface. A method for manufacturing an optical-function-member-integrated display device, comprising pressing and heating under pressure to melt and cure the film. 23. Between the optical function member and the display unit,
The method according to claim 1, wherein the bonding is performed by interposing a layer of the adhesive composition according to claim 1 or sandwiching the adhesive film according to claim 12. Surface of the adhesive composition layer or the adhesive film,
2. A volatile solvent is applied to at least one of the optical function member and / or the adhesive surface of the display unit in contact with the surface.
23. The method for manufacturing an optical function member integrated display device according to any one of 8 to 22. 24. A display device comprising: an optical function member;
The method according to claim 1, wherein the bonding is performed by interposing a layer of the adhesive composition according to claim 1 or sandwiching the adhesive film according to claim 12. Surface of the adhesive composition layer or the adhesive film,
23. The optical device according to claim 18, wherein an ultraviolet-polymerizable liquid is applied to at least one of the optical functional member and / or the adhesive surface of the display unit in contact with the surface, and the applied surface is irradiated with ultraviolet light. A method for manufacturing a functional member integrated display device.