JPH02137922A - Adhesive laminated sheet for manufacturing liquid crystal display panel - Google Patents

Abstract

PURPOSE:To prevent delamination of an adhesive layer and to prevent a decrease in the optical properties of a base material sheet by laminating a specific adhesive layer and further depositing a releasable sheet on the adhesive layer. CONSTITUTION:An adhesive layer 2 made of an alcohol soluble ultraviolet ray curable adhesive layer 2a or an aqueous heat curable adhesive layer 2b is laminated on the resin layer side of a base material sheet 1 made of a single layer sheet of resin having no solvent resistance or a plurality of layers of sheets having the resin layer as its outer layer and 30nm or less of retardation value, and a releasable sheet 3 is further laminated on the layer 2. The sheet 1 includes, for example, polycarbonate resin, polyethersulfone resin, polyallylene ester resin, or amorphous polyolefin. The sheet 3 includes, for example, paper, plastic sheet, or film coated with silicon releasing agent of organopolysiloxane.

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of Application The present invention is an adhesive laminated sheet suitable for manufacturing a liquid crystal display panel, more specifically, it has a layer structure of base sheet/adhesive layer/peelable sheet. This invention relates to adhesive type laminated sheets.

A conventional liquid crystal display panel basically has a structure in which polarizing plates are arranged on both sides of a liquid crystal cell.

Liquid crystal display panel: Polarizing plate I Liquid crystal cell 1 Polarizing plate Among these, the liquid crystal cell has two substrates on which transparent electrode layers are formed facing each other with a spacer interposed between them. It has a structure in which it is completely sealed with an adhesive such as epoxy adhesive. (An alignment film is formed on the transparent electrode, but the explanation is omitted.) Liquid crystal cell: Liquid crystal cell substrate 11 Liquid crystal story Liquid crystal cell substrate Conventionally, glass plates have been exclusively used as the liquid crystal cell substrate. Recently, the use of plastic substrates is progressing.

The polarizing plate used is one in which transparent sheets as protective sheets are laminated on both sides of a polarizing element film.

Polarizing plate: Transparent sheet 11 Polarizing element film n Transparent sheet Adhesion of the polarizing plate to the liquid crystal cell substrate 8F layer is done using an adhesive.
Polarizing plates with an adhesive layer are also popular, in which one side of a polarizing plate with the above layer structure is coated with a release sheet via an adhesive layer.In the latter case, the release sheet is removed from the polarizing plate with an adhesive layer. After peeling off and removing, the surfaces of the adhesive layer are brought into contact with both sides of the liquid crystal cell and pressed together.

Further, a liquid crystal cell substrate having a polarizing function in which a polarizing element film is incorporated into the liquid crystal cell substrate itself is currently under development.

Problems to be Solved by the Invention In the method of adhesively laminating a polarizing plate having the above-mentioned layer structure on a liquid crystal cell substrate using an adhesive, the transparent sheet (usually a polycarbonate sheet etc. is used) does not have solvent resistance. However, the transparent sheet may be damaged by the solvent contained in the adhesive. Furthermore, the method of laminating with adhesive takes time for complete adhesion, which is disadvantageous in terms of productivity.

On the other hand, a polarizing plate with an adhesive layer is advantageous because it can be attached to a liquid crystal cell simply by peeling off the release sheet, but the surface may be damaged by the solvent used when forming the adhesive layer. Moreover, after being attached to a liquid crystal cell, the adhesive layer inevitably generates bubbles or delamination due to heat, which is a factor that reduces the lifespan and reliability of the liquid crystal display panel.

Even if the liquid crystal cell substrate has a polarizing function with a polarizing element film built into the liquid crystal cell substrate itself, the base sheet is a resin sheet that does not have solvent resistance, such as polycarbonate, polyethersulfone, polyarylene ester, or amorphous polyolefin. In this case, there is a problem that the base sheet is affected by the solvent in the adhesive used when the polarizing element film is adhesively laminated on the base sheet, and the optical properties of the base sheet are deteriorated.

The present invention has been made through repeated research on adhesive-type laminated sheets having a layer structure of base sheet/adhesive layer/releasable sheet, and has solved the above problems by improving the adhesive layer. This is an attempt to solve them all at once.

Means for Solving the Problems The adhesive laminated sheet for manufacturing liquid crystal display panels of the present invention is
An alcohol-soluble ultraviolet curing type base sheet (1) with a retardation value of 30 nm or less consisting of a single-layer sheet of resin without solvent resistance or a multi-layer sheet having a layer of the resin as an outer layer is applied to the resin layer side of the base sheet (1). Adhesive R (2) consisting of adhesive layer (2a) or water-based thermosetting adhesive layer (2b)
) are laminated, and a releasable sheet (3) is further laminated on the adhesive layer (2).

The present invention will be explained in detail below.

As the base sheet (1), a single-layer sheet of resin without solvent resistance or a multi-layer sheet having a layer of the resin as an outer layer is used, and it is used for liquid crystal display panels. For this purpose, the retardation value is required to be 30nn+ or less.

Typical examples of resins without solvent resistance include polycarbonate resins, polyethersulfone resins, polyarylene ester resins, and amorphous polyolefins.

Base sheet (1) is used for manufacturing polarizing plates for liquid crystal display panels.
As such, a single layer sheet of the above-mentioned resin is often used.

For manufacturing a liquid crystal cell substrate or for manufacturing a liquid crystal cell substrate having a polarizing function by incorporating a polarizing element film into the liquid crystal cell substrate itself, multilayer sheets with various layer configurations are used as the base sheet (1), Particularly important is a multilayer sheet with the following layer structure developed by the present inventors.

"Resin sheet with a retardation value of 30 nm or less selected from the group consisting of polycarbonate resin, polyether sulfone resin, polyarylene ester resin, and amorphous polyolefin) (LA) / Water-based anchor coating! (LB) / Air resistance Synthetic resin layer (LC)
/Phenoxyether crosslinked polymer layer (ld)J In this case, a transparent electrode (4) such as ITO is provided on the phenoxyether crosslinked polymer layer (1d).

Here, as the water-based anchor coating layer (1b),
The same layer as the water-based thermosetting adhesive layer (2b) described below is used.

The air permeability synthetic resin layer (lc) has oxygen permeability (A
(measured according to STM D-1434-75) is 30 c
c/ 24hr ATM or less, preferably 20 cc/
24hr @ atm or less layer, especially a polymer containing 50 mol% or more of an acrylonitrile component, a vinyl alcohol component, or a halo, vinylidene genide component, and a reactive group with the crosslinked polymer layer (ld) described below. Examples include layers formed from Among these, polyvinyl alcohol or its copolymer modified or grafted products,
Polymers having OH groups, such as ethylene-vinyl alcohol copolymers having an ethylene content of 15 to 50 mol % or graft products thereof, are important. When such an air-permeable synthetic resin layer (1c) is placed adjacent to the phenoxy ether crosslinked polymer layer (1d) described below, the curing agent used for curing the latter can be removed without providing an adhesive layer between the two layers. This is advantageous because it allows close contact with the former at the same time, and by laminating both layers, the fragility of the vk layer is covered by the former, and the moisture permeability of the former is covered by the latter.

As for the phenoxy ether crosslinked polymer layer (1d),
A layer formed from a composition of a phenoxy ether polymer represented by the following general formula and a crosslinking agent.

(In the formula, R-R' are each hydrogen, a lower alkyl group having 1 to 3 carbon atoms or Br, R is a fullylene group having 2 to 4 carbon atoms, m is an integer of θ to 3, and n is an integer of 20 to 300. ) As a crosslinking agent, a group having high reaction activity with active hydrogen, such as an isocyanate group, a reactive training group in a carboxyl group (such as a halide, an active amide, an active ester, an acid anhydride, etc.), a mercapto group, etc. Compounds having two or more of the like are used, and polyisocyanate groups are particularly important.

(la) / (lb) / (lc) / (ld) mentioned above
The base sheet (1) is not limited to the layer structure, but any sheet having an outer layer of a polycarbonate resin, a polyethersulfone resin, a polyarylene ester resin, or an amorphous polyolefin sheet can be used as the base sheet (1).

The adhesive layer (2) is composed of an alcohol-soluble ultraviolet curable adhesive layer (2a) or a water-based thermosetting adhesive layer (2b) described below.

The thickness of the adhesive layer (2) is not particularly limited, but it is often set to 1 to 50 ILs, particularly 3 to 25 Bm on a dry basis.

<Alcohol-soluble ultraviolet curable adhesive layer (2a)>
Examples of the UV-curable adhesive in the alcohol-soluble UV-curable adhesive layer (2a) include: ■ A non-functional polymer and a polyfunctional or/and monofunctional monomer ■ A functional prepolymer ■ A functional prepolymer and a polyfunctional monomer Functional or/and monofunctional monomer ■ Functional prepolymer, non-functional polymer, and polyfunctional or/and monofunctional monomer ■ A polymerization initiator is blended into the combination of functional prepolymer and non-functional polymer. An alcoholic solution of the composition is used, further containing additives as necessary.

Examples of the non-functional polymer include urethane polymers, amide polymers, acrylic polymers, and polyester polymers.

Functional prepolymers include epoxy acrylate,
Examples include urethane acrylate, polyester acrylate, polyether acrylate, acrylate alkyd, melamine acrylate, unsaturated polyester, and epoxy resin.
A method of reacting a polyisocyanate with an acrylic yarn yarn having a hydroxyl group or a compound having a hydroxyl group, a method of reacting a hydroxyl group-containing acrylic monomer with a polyurethane obtained by reacting glycol with a polyisocyanate, etc. Can be manufactured.

Examples of polyfunctional materials include ethylene glycol diacrylate, diethylene glycol diacrylate,
Triethylene glycol diacrylate, polyethylene glycol diacrylate, propylene glycol diacrylate, dipropylene glycol diacrylate,
Tripropylene glycol diacrylate, polypropylene glycol diacrylate, butylene glycol diacrylate, neopentyl glycol diacrylate, ■, 6-hexanediol diacrylate, trimethylolpropane diacrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate, pentaerythritol Examples include tetraacrylate, dipentaerythritol hexaacrylate, and the corresponding methacrylates are also used. In addition, allyl monomers such as diallyl phthalate, diallyl isophthalate, diallyl maleate, diallyl adipate, diallyl diglycolate, triallyl cyanurate, diethylene glycol bisallyl carbonate,
Amide monomers such as N,N'-methylenebisacrylamide and hexamethylenebisacrylamide can also be used.

As the polymerization initiator, various conventionally used polymerization initiators can be used.

Examples of additives include thermal polymerization inhibitors, adhesive agents, thixotropic agents, fillers, and the like.

Examples of the alcohol used to prepare the alcohol solution of the composition comprising the above-mentioned components include methanol, ethanol, propatool, butanol, cyclohexanol, and the like.

Among the alcohol-soluble UV-curable adhesives mentioned above, one-component UV-curable urethane acrylate adhesives that use Impropatool as a solvent are most preferred. There is Takerai UV-500 manufactured by Kogyo Co., Ltd.

Water-based thermosetting adhesive layer (2b) A layer formed from a composition consisting of a polymer that has a sufficient amount of hydrophilic groups in its molecule to dissolve or disperse itself in an aqueous medium and a curing agent. Examples of the aqueous medium include water and a mixed solvent of water and alcohol, and examples of the hydrophilic group include sulfonic acid metal bases, carboxyl groups, primary amine groups, secondary amine groups, and tertiary amine groups. , a quaternary ammonium group, and the like. Typical examples of polymers that have hydrophilic groups in their molecules include polyester resins that have the above-mentioned hydrophilic groups, polyamide resins that have the above-mentioned hydrophilic groups, polyurethane resins that have the above-mentioned hydrophilic groups, and polyester urethanes that have the above-mentioned hydrophilic groups. resin,
Examples include ionic polymer complexes made of a mixture of polyethylene, polyacrylic acid, and modified starch. Note that the polymer includes oligomers and prepolymers.

-Sheet 3 The releasable sheet (3) includes: ■ A paper or plastic sheet or film coated with a silicone release agent made of organopolysiloxane; ■ A sheet or film that itself has releasability;
For example, plastic sheets or films made of fluororesin, high-density polyethylene, etc.; Plastic sheets or films formed by blending a release agent; ■ Plastic sheets or films formed by graft polymerization of organopolysiloxane and polyolefin resin. , etc. are used.

There is no particular limitation on the thickness of the releasable sheet (3), but it is usually about 12 to 250 ILffl, particularly about 30 to 80 gm.

By using the above-mentioned base material (1), an adhesive solution for forming the adhesive layer (2), and a releasable sheet (3), the base material (1)/adhesive layer is formed. (2) / Peelable sheet (
A laminated sheet of the present invention having the layer structure 3) is obtained.

FIG. 1 is a sectional view showing the layer structure of the adhesive laminate sheet of the present invention.

The order of lamination is arbitrary, and the adhesive solution for forming the adhesive layer (2) is applied to either the base sheet (1) or the releasable sheet (3), and dried to form an adhesive layer that remains slightly tacky. (2) is formed, and then the releasable sheet (3) or the base sheet (1) is layered over the adhesive layer (2) and pressure bonded.

It is also possible to provide adhesive layers (2) on both sides of base material sheet (1) and laminate a releasable sheet (3) on each adhesive layer (2).

Effects of the invention The adhesive layer (2) in the adhesive laminate sheet of the present invention is
When the adhesive layer (2) is an alcohol-soluble ultraviolet curable adhesive layer (2a), it is stable unless irradiated with ultraviolet rays, and the adhesive layer (2) is an aqueous thermosetting adhesive layer. In the case of (2b), it is stable unless heated.

When using the adhesive laminated sheet of the present invention, first peel off the releasable sheet (3) from the laminated sheet, and then remove the adhesive layer of the sheet consisting of the base sheet (1)/adhesive layer (2). (2) side is brought into contact with the object and crimped. Adhesive layer (
2) has a slight tack at this stage, so it can be pasted.

Next, when the adhesive layer (2) is an alcohol-soluble ultraviolet curable adhesive layer (2a), it is applied from the base sheet (1) side, or when the object to be adhered is transparent, the object. The ultraviolet rays may be irradiated from the side or from both the side of the base sheet (1) and the side of the object. Adhesive layer (
When 2) is a water-based thermosetting adhesive layer (2b), heat curing may be performed.

In the present invention, the adhesive layer (2) has the great advantage that although it is an adhesive, it can be applied like a conventional adhesive, and moreover, it can achieve permanent adhesion.

Further, the present invention has great significance in that it can be applied to a base sheet (1) consisting of a single layer sheet of a resin having no solvent resistance or a multilayer sheet having a layer of the resin as an outer layer.

2 to 4 are cross-sectional views showing application examples of the adhesive laminated sheet of the present invention.

When the adhesive laminated sheet of the present invention is used to manufacture a polarizing plate for a liquid crystal display panel, the peelable sheet (3) is removed and the sheet is applied from both sides of the polarizing element film (5). As a result, a polarizing plate having a layered structure consisting of base material sheet (1)/adhesive layer (2)/polarizing element film (5)/adhesive layer (2)/substrate sheet (1) is obtained. (See Figure 2) When using the adhesive laminated sheet of the present invention for manufacturing a liquid crystal cell substrate, a transparent electrode (0) is formed on the outer surface of the base sheet (1) of the laminated sheet in advance. Two sheets like this are connected to each transparent electrode (0
A liquid crystal (7) is sealed there with their sides facing each other, and each releasable sheet (3) is removed and a normal polarizing plate (6) is pasted thereon. As a result, polarizing plate (6) / adhesive layer (2) / base sheet (1) / transparent electrode (4) / liquid crystal (7) / transparent electrode (0 / base sheet (1) / adhesive layer ( 2) A liquid crystal display panel having a layered structure consisting of a polarizing plate (6) is obtained. (See Figure 3) When the adhesive laminated sheet of the present invention is used for manufacturing a liquid crystal cell substrate having a polarizing function, it is necessary to peel it off. The polarizing element film (
5), a transparent electrode (4) is formed on the outer surface of one side, and these two sheets are attached to the transparent electrode (4).
4) A liquid crystal (7) is sealed in between so that the sides face each other. As a result, the base material sheet) (1)/adhesive layer (2)
/Polarizing element 1f! (5)/adhesive layer (2)/base material sheet) (
1) / Transparent electrode (4) / Liquid crystal (7) / Transparent electrode (4) /
Base material sheet) (1) / Adhesive layer (2) / Polarizing element film (5) /
A liquid crystal cell having a polarizing function, that is, a liquid crystal display panel having a layered structure of adhesive layer (2)/base sheet (1) is obtained. (See FIG. 4) EXAMPLES The present invention will now be further explained with reference to examples.

Hereinafter, "parts" and "%" are expressed on a weight basis.

Example 1 "Soil" - Nijou U A polycarbonate sheet (manufactured by Teijin Ltd.) (la) with a thickness of 90 pm and a retardation value of 12 nm as an example of a resin sheet was coated with a solid content having polyester urethane as the main ingredient. An anchoring agent containing 100 parts of a 40% aqueous dispersion (NeoRez R-9317, manufactured by Kusunoki Kasei Co., Ltd.) and 5 parts of a water-soluble epoxy curing agent (World Lock X-2030, manufactured by Kyoritsu Kagaku Sangyo Co., Ltd.) was wire-rounded. It was applied using a doctor and dried at 90° C. for about 5 minutes to form a water-based anchor coating layer (1b) having a thickness of about IILoI.

On this water-based anchor coating layer (lb), a coating liquid having a composition consisting of 20 parts of ethylene-vinyl alcohol copolymer with an ethylene content of 32 mol%, 48 parts of water, 32 parts of n-propanol, and 4 parts of methylolated melamine was applied. Apply, 7
It was dried at 0-110° C. to form an air-permeable synthetic resin layer (IC) having a thickness of about 10 ALra.

Next, on this air-permeable synthetic resin layer (IC), 40 parts of phenoxy ether resin (manufactured by Tobu Kasei Co., Ltd.), 40 parts of methyl ethyl ketone, 20 parts of cellosolve acetate, and 75 parts of trirediisocyanate-trimethylolpropane adduct were added. % solution (Coronate L manufactured by Nippon Polyurethane Co., Ltd.) using an applicator, dried at 80°C for 4 minutes, and then heat-treated at 130°C for 20 minutes to form a phenoxy ether. A crosslinked polymer layer (1d) was formed.

Next, on the phenoxyether-based crosslinked polymer layer (1d) of the sheet thus obtained, a mixture of indium oxide and tin oxide in a weight ratio of 95:5 was applied to a thickness of 30 mm.
A transparent conductive layer of 0 was formed by sputtering to form a transparent electrode (0).

As a result, polycarbonate sheet) (la) / water-based anchor coating layer (lb) / air-permeable synthetic resin layer (IC) / phenoxy ether-based crosslinked polymer layer (ld)
A base sheet (1) with a transparent electrode (4) having a layered structure of /transparent electrode (4) was obtained.

1111 As an adhesive solution for forming the alcohol-soluble ultraviolet curable adhesive layer (2a), Takelite UV-500 manufactured by Takeda Pharmaceutical Co., Ltd. (isopropanol, an anaerobic ultraviolet curable resin whose main ingredient is acrylic urethane) was used. Solution, liquid type, solid content 40%, Zahn viscosity 18 seconds/25°C) was used.

511 As the releasable sheet (3), 0.5 silicone release agent was added.
A 50 part thick polyester film coated with g/rn' was used.

As a 4-hole shell polarizing plate (6), a thickness of 30I is made of a polyvinyl alcohol glycidyl methacrylate grafted product as a base material.
60μ thick on both sides of LI11's dichroic dye-based polarizing element film.
A commercially available polarizing plate having a laminated layer of polycarbonate of 500 mm was used.

11 Sheet On the silicone-coated surface of the releasable sheet (3).

Apply the above adhesive solution using an applicator and
Alcohol-soluble UV-curable adhesive layer (2a) with a slight tack, dried at 0°C for 2 minutes and having a thickness of 10 gm.
was formed, and then the polycarbonate sheet (la) side of the base sheet (1) was pressed onto it.

As a result, a laminated sheet shown in FIG. 1 having the layer structure of base sheet (1)/adhesive layer (2a)/peelable sheet (3) was obtained.

Separately from the above, the above adhesive solution was applied to the polycarbonate sheet (la) side of the base sheet (1) using an applicator, dried at 80°C for 2 minutes,
An alcohol-soluble ultraviolet curable adhesive layer (2a) having a thickness of 10 gm and a slight tack was formed, and then the silicone-coated side of the releasable sheet (3) was pressed onto the layer.

Also by this lamination method, the laminated sheet shown in FIG. 1 having the layer structure of base sheet (1)/adhesive layer (2a)/releasable sheet (3) was obtained.

After peeling and removing the releasable sheet (3) from the laminated sheet obtained above, the adhesive layer (2a) side was attached to the above polarizing plate (6).
) was layered on one side and crimped.

Then, while moving this multilayer sheet on the conveyor,
Irradiation amount 12 from the transparent electrode (4) side of the base sheet (1)
The adhesive layer (2a) was completely cured by irradiating ultraviolet rays under the conditions of 0 W/cs and an irradiation time of io seconds. This achieved strong adhesion between each layer.

'Transparent electrodes on two substrates with polarizing plates obtained in this way (
A liquid crystal display panel was produced by placing the 4) sides facing each other and sealing the liquid crystal (7) between them.

Example 2 As the base material sheet (1), a polyarylene ester sheet with a thickness of 50 gm and a retardation (lII6n+s, for a thickness of 80), a polyether sulfone sheet with a retardation value of 16 nm, a thickness of 70JL11, and a retardation value of 15 nm. Example 1 was repeated except that an amorphous polyolefin sheet of 1 was used, and the same favorable results as in Example 1 were obtained.

Example 3 In the same manner as in Example 1, polycarbonate sheet) (l
a) / Water-based anchor coating layer (lb) / Air-permeable synthetic resin layer (IC) / Phenoxy ether crosslinked polymer layer (ld) / Transparent electrode (transparent electrode with a layer structure consisting of 0
4) with a base sheet (1), and its transparent electrode (0
A base material sheet (1) was produced in which the installation of a chisel was omitted.

Using these two types of base sheets (1), a laminated sheet having a layer structure of base sheet (1)/adhesive layer (2a)/peelable sheet (3) was produced in the same manner as in Example 1. did. At this time, the base sheet (1) polycarbonate sheet) (
The la) side was made to be the adhesive layer (2a) side.

After peeling and removing the releasable sheet (3) from the two types of laminated sheets obtained above, the adhesive layer (2a) side of each was coated with dichroic ethylene-vinyl alcohol copolymer having an ethylene content of 32 mol%. A polarizing element film (5) containing a dye was layered on each side and pressure bonded.

Subsequently, ultraviolet rays are irradiated from the side of the base sheet (1) on which the transparent electrode (4) is not installed, and the adhesive layer (2a) is
was completely cured.

As a result, the base material sheet (1) / adhesive layer (2a) / polarizing element WJ (5) / adhesive layer (2a) / base material sheet (1)
/Since a liquid crystal cell substrate having a polarizing function with a layer structure of transparent electrode (4) was obtained, two of the substrates were combined with each transparent electrode (4).
A liquid crystal display panel was produced by placing the liquid crystal (7) between them so that the 0 sides faced each other.

Example 4 Single-layer base sheet made of polycarbonate sheet (1
), the base sheet (1)/
A laminated sheet having a layer structure of adhesive layer (2a)/peelable sheet (3) was produced.

After peeling and removing the releasable sheet (3) from the two laminated sheets obtained above, the adhesive layer (2a) side of each was coated with a dichroic dye on the ethylene-vinyl alcohol copolymer with an ethylene content of 32 mol%. The adhesive layers (2a) and (2a) were then completely cured by applying ultraviolet irradiation.

As a result, the base material layer (1)/adhesive layer (2a)/
Polarizing film (5)/adhesive layer (2a)/base sheet (1)
A polarizing plate for a liquid crystal display panel having the following layer structure was obtained.

Example 5 The same base material (1) as in Example 1 was used.

The water-based anchor coating layer (1) in Example 1 was used as the adhesive solution for forming the water-based thermosetting adhesive layer (2b).
b) A solution with the same composition as the forming composition was used.

The same peelable sheet (3) and polarizing plate (6) as in Example 1 were also used.

The above adhesive solution is applied to the silicone coated surface of the above releasable sheet (3) using an applicator, and dried at 90°C for 5 minutes to form a slightly tackier water-based thermosetting adhesive with a thickness of 10IL11. Layer (2b) was formed, and then the polycarbonate sheet (la) side of the base sheet (1) was pressed onto the layer (2b).

As a result, the laminated sheet shown in FIG. 1 having the layer structure of base sheet (1)/adhesive layer (2b)/peelable sheet (3) was obtained.

After peeling and removing the releasable sheet (3) from the 11tN sheet obtained above, the adhesive layer (2b) side thereof was layered on one side of the above polarizing plate (6) and pressure bonded. Then the temperature is 100℃
Heat curing was performed for 20 minutes to completely cure the adhesive layer (2b). This achieved strong adhesion between each layer.

Transparent electrodes (4
) sides facing each other and liquid crystal (7) was sealed between them to produce a liquid crystal display panel.

Example 6 Using the aqueous thermosetting adhesive layer (2b) described in Example 5 as the adhesive layer (2), a polarizing plate for a liquid crystal display panel and a liquid crystal display panel was prepared according to Examples 2 to 4. was created.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the layer structure of the adhesive laminate sheet of the present invention. 2 to 4 are cross-sectional views showing application examples of the adhesive laminated sheet of the present invention. (1)...Base sheet, (1a)...Resin sheet,
Polycarbonate sheet, (1b)...aqueous anchor coating layer, (1c)...air permeable synthetic resin layer,
(1d)...Phenoxy ether crosslinked polymer layer, (
2)... Adhesive layer, (2a)... Alcohol-soluble ultraviolet curable adhesive layer, (2b)... Water-based thermosetting adhesive layer, (3)... Peelable sheet, (4 )...Transparent electrode, (5)...Polarizing element film, (B)...Polarizing plate, (
7)...LCD Figure 1 Figure 2 Prisoner Patent Applicant Fujimori Industries Co., Ltd. Figure 3

Claims (1)

[Claims] 1. The resin layer of the base sheet (1) having a retardation value of 30 nm or less and consisting of a single-layer sheet of a resin without solvent resistance or a multi-layer sheet having a layer of the resin as an outer layer. Alcohol-soluble UV-curable adhesive layer (2a) on the side
Or manufacturing a liquid crystal display panel having a structure in which an adhesive layer (2) consisting of a water-based thermosetting adhesive layer (2b) is laminated, and a releasable sheet (3) is further laminated on the adhesive layer (2). Adhesive laminated sheet for use. 2. The adhesive laminate sheet according to claim 1, wherein the resin having no solvent resistance in the base sheet (1) is a polycarbonate resin, a polyethersulfone resin, a polyarylene ester resin, or an amorphous polyolefin. 3. The adhesive laminate sheet according to claim 1, wherein the alcohol-soluble UV-curable adhesive layer (2a) is a layer formed using a urethane acrylate-based one-component alcohol-soluble UV-curable adhesive. 4. The water-based thermosetting adhesive layer (2b) has an ester bond,
A polymer made of at least one bonding group selected from the group consisting of an amide bond, a urethane bond, and an ether bond, which has a sufficient amount of hydrophilic groups to dissolve or disperse itself in an aqueous medium. 2. The adhesive laminate sheet according to claim 1, wherein the layer is formed from a composition comprising a polymer contained therein and a curing agent.