JPH11181384A - Adhesive composition and adhesive film for display formed integrally with touch panel, display formed integrally with touch panel, and production thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an adhesive compsn. for a display formed integrally with a touch panel which gives good display properties and can form an adhesive layer excellent in clarity, adhesiveness, and durability by using, as the main ingredient, a copolymer formed from ethylene, vinyl acetate, and maleic acid and/or maleic anhydride and to obtain an adhesive film prepd. therefrom. SOLUTION: This adhesive compsn. pref. contains, as the main ingredient, a copolymer having a vinyl acetate unit content of 10-50 wt.% and a maleic acid unit and/or maleic anhydride unit content of 0.01-10 wt.% and is thermally curable and/or photocurable. In the case of thermal curing, 0.1-10 pts.wt.org. peroxide is added to 100 pts.wt. copolymer; and in the case of photocuring, 0.1-10 pts.wt. photosensitizer is added. An org. peroxide may be jointly used with a photosensitizer. The compsn. may further contain a silane coupling agent, a compd. having a (meth)acryloxy or allyl group, a hydrocarbon resin, an epoxy compd., etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a touch panel and a C
An adhesive composition and an adhesive film for bonding the touch panel and the display unit of a touch panel-integrated display device having a structure in which a display unit such as an RT (cathode ray tube-cathode tube) or an LCD (liquid crystal) is integrated; The present invention relates to a touch panel-integrated display device obtained by using the adhesive composition or the adhesive film and a method for producing the same.

[0002]

2. Description of the Related Art Recently, a touch panel-integrated display device having a structure in which a touch panel and a display unit such as a CRT or an LCD are integrated has been used in ATMs and CDs of banks, ticket vending machines in stations, and the like. It has been widely used in portable information terminals and the like.

As shown in FIG. 2, the touch panel-integrated display device generally has a spacer 3 interposed between the touch panel 1 and a display unit 2 such as an LCD, so that the touch panel 1 and the display unit 2 are interposed. Is provided with a constant gap 4 of about 0.4 mm. This is because when the touch panel 1 is brought into direct contact with the display unit 2, when the touch panel 1 is touched, pressure is directly applied to the display unit 2 and the screen is blurred. Since the liquid crystal layer is distorted, the screen is easily blurred.

However, if there is a gap between the touch panel and the display unit, reflection and scattering and absorption of light occur,
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.

For this reason, it is desired that the touch panel and the display unit are directly bonded to each other so as not to form a gap. However, conventionally, there is no effective adhesive used for this bonding. When an agent is used, since the adhesive layer is hard, when the touch panel is pressed, the pressing force is directly transmitted to the display unit as it is, and bleeding easily occurs. 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 the touch panel and the display unit are directly joined, it has an appropriate elasticity or cushioning property, gives good display properties as a touch panel integrated display device, and forms an adhesive layer having excellent transparency, adhesiveness, and durability. An object of the present invention is to provide an adhesive composition and an adhesive film for a touch panel integrated display device, a touch panel integrated display device, and a method for manufacturing the same.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above objects, the present invention provides an adhesive composition and an adhesive film for a touch panel integrated display device, a touch panel integrated display device and the following. A manufacturing method is provided. Claim 1: Heat and / or adhesion of the touch panel and the display unit of the display device in which the touch panel and the display unit are integrated.
Or a photocurable adhesive composition comprising a copolymer of ethylene, vinyl acetate and maleic acid and / or maleic anhydride as a main component, for a touch panel integrated display device. In a preferred embodiment, the adhesive composition is prepared by adding 0.1 to 10 parts by weight of an organic peroxide to 100 parts by weight of the copolymer. (3) The adhesive composition according to the above (1), wherein a photosensitizer is added in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the copolymer. [4] The adhesive according to [1], wherein 0.1 to 10 parts by weight of a photosensitizer and 0.1 to 10 parts by weight of an organic peroxide are added to 100 parts by weight of the copolymer. Composition. [5] The adhesive composition according to any one of [1] to [4], wherein 0.01 to 5 parts by weight of a silane coupling agent is added to 100 parts by weight of the copolymer. Claim 6: At least one of an acryloxy group-containing compound, a methacryloxy group-containing compound and an allyl group-containing compound is used in an amount of 0.1 to 50 based on 100 parts by weight of the copolymer.
The adhesive composition according to any one of claims 1 to 5, wherein the adhesive composition is added in parts by weight. [7] The adhesive composition according to any one of [1] to [6], wherein 1 to 200 parts by weight of a hydrocarbon resin is added to 100 parts by weight of the copolymer. Claim 8: The content of vinyl acetate units in the copolymer is 1
The adhesive composition according to any one of claims 1 to 7, wherein the content of the maleic acid and / or maleic anhydride units is 0.01 to 10% by weight, from 0 to 50% by weight. In a ninth aspect, the adhesive composition according to any one of the first to eighth aspects is formed into a film, and one or both surfaces thereof are embossed with an average roughness Ra of 0.1 to 20 μm. An adhesive film for a touch panel-integrated display device, comprising: In a tenth aspect, a touch panel integrated display is provided, wherein the touch panel and the display unit are bonded by a heat and / or light curing layer of the adhesive composition according to any one of the first to eighth aspects. apparatus. In a preferred embodiment, a layer of the adhesive composition according to any one of claims 1 to 8 is interposed between the touch panel and the display unit, and the composition is cured by heat and / or light. Of manufacturing a touch panel integrated display device. In a twelfth aspect of the present invention, there is provided a touch panel-integrated display device, wherein the adhesive film according to the ninth aspect is sandwiched between a touch panel and a display unit, and then heated under reduced pressure to melt and cure the film. Production method. In a thirteenth aspect of the present invention, there is provided a touch-panel-integrated display device comprising the adhesive film according to the ninth aspect sandwiched between a touch panel and a display unit, and then heated under pressure to melt and cure the film. Production method.

The adhesive composition for a touch panel-integrated display device (hereinafter, simply referred to as an adhesive) and the adhesive film of the present invention are heat and / or light curable.
Because it can be in the form of a film, it can be easily and accurately attached to touch panels and display devices,
Further, since the adhesive used in the present invention has self-adhesiveness (surface tackiness), it can be easily bonded to a touch panel or a display device, and can be bonded at a relatively low temperature of about room temperature to about 80 ° C. Further, as described above, since this adhesive has self-adhesiveness, there is no deviation or peeling after bonding, and it can be handled freely before curing. Further, the adhesive has a low elastic modulus after curing and is rich in flexibility.

[0009] The touch panel integrated display device obtained by directly bonding the touch panel and the display unit using the adhesive or the adhesive film does not need to provide a gap between the touch panel and the display unit. In addition, the above-described problems such as a decrease in contrast, a decrease in visibility, a problem of parallax at the time of input, a shadow of a display, and the like are solved, and a touch panel and a display unit are directly joined to each other because of appropriate elasticity or cushioning. Even if it is applied, there is no problem of bleeding, and it has a good display property, and the adhesive layer made of the curable adhesive or the adhesive film has excellent transparency, adhesiveness, and durability, and has a robust display. A device may be formed.

[0010] Further, the adhesive film, particularly the adhesive film of the ninth aspect, which is embossed, is provided in the first aspect.
Used in the manufacturing method of No. 2 or 13, the embossing makes it possible to easily perform the alignment again even if a shift or the like occurs because there is no surface tack when interposed between the touch panel and the display unit. In addition to easy alignment, air pressure between the film and the touch panel or display can be easily removed by decompression or processing, and a uniform adhesive layer free of defects such as air traps can be reliably formed. Can be bonded in close contact.

Hereinafter, the present invention will be described in more detail.
The adhesive of the present invention is a curable adhesive mainly containing a copolymer of ethylene, vinyl acetate and maleic acid and / or maleic anhydride, which is cured by heat and / or light.

[0012] Here, ethylene, vinyl acetate, maleic acid and / or ethylene, which are main components of the adhesive used in the present invention, are used.
Alternatively, the copolymer of maleic anhydride has a vinyl acetate content of 10 in terms of reactivity during curing, flexibility and durability after curing.
To 50% by weight, more preferably 1 to 50% by weight.
5 to 45% by weight. Further, the content of maleic acid and maleic anhydride units is 0.01 to 10% by weight, particularly 0.0% by weight.
The content is preferably 5 to 5% by weight.
If the content is more than 10% by weight, workability may be reduced.

For curing the adhesive of the present invention, an organic peroxide or a photosensitizer can be used. However, when the curable adhesive is a thermosetting adhesive, usually an organic peroxide or a photosensitizer is used. When a peroxide is used and the curable adhesive is a photocurable adhesive, a photosensitizer is usually used.

As the organic peroxide added for curing the adhesive of the present invention, any organic peroxide can be used as long as it decomposes at a temperature of 70 ° C. or more to generate radicals. It is preferable that the decomposition temperature for 10 hours is 50 ° C. or more, and the temperature is selected in consideration of adhesive preparation conditions, film forming temperature, curing (bonding) conditions, storage stability of the adhesive, and the like.

Examples of usable 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 2,5-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) -3,3,5-trimethylcyclohexane; t-butylperoxybenzoate; benzoyl peroxide; t-butylperoxyacetate; 1,1-bis (t-butylperoxy)-
3,3,5-trimethylcyclohexane; 1,1-bis (t-butylperoxy) cyclohexane; 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-butyl peroxyisobutyrate; 2,4-dichlorobenzoyl peroxide and the like.

As the organic peroxide, one of these is used.
Species can be used alone or as a mixture of two or more,
The amount of addition was 0.1 parts with respect to 100 parts by weight of the copolymer.
10 to 10 parts by weight is sufficient.

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

Among the radical photopolymerization initiators, examples of the hydrogen abstraction initiator include benzophenone, methyl orthobenzoylbenzoate, 4-benzoyl-4'-methyldiphenylsulfide, isopropylthioxanthone, diethylthioxanthone, and 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. Furthermore, as an α-aminoalkylphenone type,
Methyl-1- [4- (methylthio) phenyl] -2-morpholinopropane-1, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butanone-1 and the like; Phosphine oxide or the like is used.

As the photosensitizer, at least one of them is used alone or in combination of two or more, and 0.1 to 10 parts by weight is added to 100 parts by weight of the copolymer.

In the adhesive of the present invention, the photosensitizer and the organic peroxide may be used in combination, whereby the photocuring and the thermosetting can be used together.

The adhesive of the present invention may contain a silane coupling agent 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, etc. These may be used alone or in combination of two or more. The addition amount of these silane coupling agents depends on the amount of the copolymer 1
Usually, 0.01 to 5 parts by weight per 100 parts by weight is sufficient.

Furthermore, an epoxy group-containing compound can be 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;
-Phthalic acid diglycidyl ester; glycidyl methacrylate; butyl glycidyl ether and the like. 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 sufficient to be 0.1 to 20 parts by weight with respect to 100 parts by weight of the copolymer, and at least one of the epoxy group-containing compounds can be added alone or in combination. .

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,
-Hydroethyl group, 3-hydroxypropyl group, 3-chloro-2-hydroxypropyl group and the like. 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. It is used in an amount of 0.1 to 50 parts by weight, preferably 0.5 to 20 parts by weight, based on 100 parts by weight of the united product. 0.1
When the amount is less than part by weight, the effect of improving heat resistance and mechanical strength may be reduced, and when the amount is more than 50 parts by weight, workability and film forming property during preparation of the adhesive may be reduced.

Further, 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. Rosin, rosin derivatives, and terpene resins are preferably used in the natural resin system. For rosin, gum-based resins, tall oil-based resins, and wood-based resins can be used. As rosin derivatives, rosin is hydrogenated, heterogenized, polymerized,
Esterified or metal salted ones can be used.
As the terpene-based resin, terpene-based resins such as α-pinene and β-pinene, as well as terpene phenol resins can be used. Also, Dammar as other natural resin,
Coral and shellac can be used. On the other hand, in the case of synthetic resins, petroleum resins, phenol resins, and xylene resins are preferably used. Petroleum resins include aliphatic petroleum resins, aromatic petroleum resins, alicyclic petroleum resins, copolymerized petroleum resins, hydrogenated petroleum resins, pure monomer petroleum resins,
Coumarone indene resin can be used. As the phenolic resin, an alkylphenol resin and a modified phenol resin can be used. As the xylene-based resin, a xylene resin or a modified xylene resin can be used.

The amount of the hydrocarbon resin to be added is appropriately selected, but is preferably from 1 to 200 parts by weight, more preferably from 5 to 150 parts by weight, per 100 parts by weight 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, 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) Examples of isocyanurate and phosphorus-based flame retardants include triphenyl phosphate, leophos triallyl phosphate, octyl cresyl diphenyl phosphate, tricresyl phosphate and the like.

The adhesive of the present invention is prepared by uniformly mixing the above-mentioned copolymer and the above-mentioned additives, kneading them with an extruder, a roll or the like, and then using a calender, roll, T-die extrusion, inflation or other film-forming method. Can be used in the form of a film. In forming the film, an embossing process may be performed to facilitate degassing at the time of pressure bonding with the touch panel or the display unit. As the embossing method, a known method can be adopted, and for example, a molding method using an embossing roll and a transfer method using an embossed film having releasability are suitably adopted.

In this case, the thickness of the film is appropriately selected, but is preferably 50 to 1000 μm, particularly preferably 50 to 500 μm. When embossing is performed to form fine irregularities (emboss) on the surface, the average roughness Ra is preferably 0.1 to 20 μm, particularly preferably 1 to 15 μm. If it is finer than 0.1 μm, and air that is interposed between the film and the touch panel or display unit is removed by using a vacuum pump or the like under reduced pressure or by applying pressure,
There is a possibility that an air passage may be blocked and air may remain, and workability is poor. On the other hand, if the film is too coarse, when the film is heated and melted, the emboss may remain undissolved when the fluidity of the adhesive is low, and the transparency may be reduced or the uniformity of the adhesive layer may be impaired. , Ra of 0.1 to 20 μm facilitates degassing, good adhesion, and good transparency and light transmittance.

The curing condition of the adhesive of the present invention depends on the kind of the organic peroxide to be used in the case of thermal curing using an organic peroxide.
It is preferable that the heating time is 150 ° C. for 2 to 60 minutes, particularly 5 to 30 minutes. In this case, the curing is preferably 0.01 to 50 k
It is recommended to carry out under a pressure of gf / cm ² , especially 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.

The touch panel-integrated display device of the present invention comprises:
As shown in FIG. 1, the adhesive or the adhesive film 10 is interposed between the touch panel 1 and the display unit 2 and is obtained by curing.

Here, the configuration of the touch panel may be a conventionally known configuration, and the display unit may have a known configuration such as a CRT or an LCD.

In the present invention, in the case of manufacturing a touch panel integrated display device, it is preferable to use an adhesive film. However, if necessary, the copolymer and the above-mentioned additives exert no influence on the touch panel and the display portion. It can be uniformly dissolved in a solvent that does not affect it, and can be used as a solution-type adhesive. It can be uniformly applied to the surface of a touch panel and / or a display unit, temporarily press-bonded, and then heated and cured.

When an adhesive film is used, the adhesive film may have a surface roughness Ra on which the embossing is performed.
It is preferable to use an adhesive film having fine irregularities of 0.1 to 20 μm from the viewpoints of workability such as positioning, ease of removing air between the film and a member (touch panel, display unit), and the like.

When a touch panel-integrated display device is manufactured using this adhesive film, the adhesive film is cut in accordance with the size of the touch panel or the display unit, and sandwiched between the two. Next, the laminate is placed in a vacuum chamber, and the inside thereof is depressurized to remove air existing between the film and the member. In this case, for example, it is possible to adopt a method in which the above-mentioned laminate is inserted into a bag having high airtightness and flexibility, and then the air in the bag is sucked and deaerated by a vacuum pump, whereby the inside of the bag is laminated. The bag comes into close contact with the body, and the entire laminate is put in a state of being pressed by the bag.

After the air between the film and the member is removed in this manner, the air is removed from the film by a heating furnace such as a hot air circulation furnace.
By heating to about 0 ° C. to melt and cure the film (adhesive), the bonding of the members via the film is completed. In this case, 1 to 10 kgf /
Pressing can be performed with a pressure of about cm ^2. However, when the above-described bag is used, the laminate is not necessarily pressurized because the inside of the bag is vacuum and is held by the bag.

Alternatively, after the film is interposed between the members, the laminate is put into a heating furnace such as a hot-air circulating furnace as it is, and the film and the members are brought into close contact with each other by the weight of the touch panel itself, and at about 50 to 100 ° C. To melt the film and temporarily press-bond it, and then use a device capable of heating under pressure, such as an autoclave, for 1 to 10 kgf / cm.
It is also possible to heat under pressure at about ^{2 to} about 100 to about 100 ° C.

[0039]

According to the present invention, a touch panel-integrated display device having good display properties can be obtained simply and reliably.

[0040]

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 compounds shown in Table 1 were dissolved in toluene, and a dry thickness of 100 µm was formed on a PET film which had been subjected to embossing (Ra = 2.5 µm) and release treatment.
It was coated so that it becomes. After drying, it was laminated with another similar PET film as shown in FIG. 3 to obtain an adhesive film laminate. In FIG. 3, reference numeral 11 denotes a PET film that has been subjected to embossing and release processing.

Next, after cutting the laminated product to the size of a touch panel, the PET films on both sides are peeled off and removed.
An adhesive film having embosses on both sides is sandwiched between the touch panel and the LCD, and then put into a flexible airtight bag. After the air in the bag is sucked out by a vacuum pump, 8
By performing a heat treatment at 0 ° C. for 1 hour, the touch panel and L
A display device integrated with a CD was obtained.

[0043]

[Table 1]

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

After this was cut into the same size as the touch panel, it was sandwiched between the touch panel and the LCD in the same manner as in Example 1, and the laminate was put into a hot air circulating furnace at 80 ° C. for 30 minutes. Next, the thus preliminarily pressed product was placed in an autoclave at 80 ° C. and 5 kgf / cm ² for 3 hours.
Touch and LC by heating and pressing for 0 minutes
A display device in which D and D were integrated was obtained.

In each of the display devices of the above embodiments, the contrast is improved and no parallax is perceived as compared with the conventional display device having a gap between the touch panel and the LCD.

[Brief description of the drawings]

FIG. 1 is a sectional view showing one embodiment of a touch panel integrated display device of the present invention.

FIG. 2 is a sectional view of a conventional touch panel integrated display device.

FIG. 3 is a cross-sectional view illustrating an example of a method for obtaining an adhesive film having an emboss.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Touch panel 2 Display part 10 Adhesive or adhesive film

Claims (13)

[Claims] 1. A heat and / or photo-curable adhesive composition for bonding a touch panel and a display unit of a display device in which a touch panel and a display unit are integrated, comprising ethylene, vinyl acetate, maleic acid, An adhesive composition for a touch panel-integrated display device, comprising a copolymer of maleic anhydride as a main component. 2. The adhesive composition according to claim 1, wherein 0.1 to 10 parts by weight of an organic peroxide is added to 100 parts by weight of the copolymer. 3. The adhesive composition according to claim 1, wherein 0.1 to 10 parts by weight of a photosensitizer is added to 100 parts by weight of the copolymer. 4. A photosensitizer of 0.1 to 10 parts by weight and an organic peroxide of 0.1 to 1 part by weight per 100 parts by weight of the copolymer.
The adhesive composition according to claim 1, wherein 0 parts by weight are added. 5. The adhesive composition according to claim 1, wherein 0.01 to 5 parts by weight of a silane coupling agent is added to 100 parts by weight of the copolymer. 6. An amount of at least one of an acryloxy group-containing compound, a methacryloxy group-containing compound and an allyl group-containing compound is 0.1 to 100 parts by weight of the copolymer.
The adhesive composition according to any one of claims 1 to 5, wherein 50 parts by weight are added. 7. The adhesive composition according to claim 1, wherein 1 to 200 parts by weight of a hydrocarbon resin is added to 100 parts by weight of the copolymer. 8. The copolymer according to claim 1, wherein the content of vinyl acetate units is 10 to 50% by weight, and the content of maleic acid and / or maleic anhydride units is 0.01 to 10% by weight. The adhesive composition according to any one of the above. 9. An adhesive composition according to claim 1, which is formed into a film and embossed on one or both surfaces thereof with an average roughness Ra of 0.1 to 20 μm. An adhesive film for a touch panel-integrated display device characterized by being applied. 10. The touch panel and the display unit according to claim 1,
9. A touch panel-integrated display device, which is adhered by a heat and / or photocurable layer of the adhesive composition according to any one of items 8 to 8. 11. A method in which a layer of the adhesive composition according to claim 1 is interposed between a touch panel and a display unit, and then the composition is cured by heat and / or light. A method for manufacturing a touch panel integrated display device. 12. A touch panel-integrated display device, comprising: interposing the adhesive film according to claim 9 between a touch panel and a display unit, and then heating the film under reduced pressure to melt and cure the film. Manufacturing method. 13. An integrated display device for a touch panel, wherein the adhesive film according to claim 9 is sandwiched between a touch panel and a display portion, and then heated under pressure to melt and cure the film. Manufacturing method.