KR20080087971A - Pressure sensitive adhesive transfer-tape used in article for liquid crystal display - Google Patents

Abstract

A pressure-sensitive adhesive transfer tape is provided to secure high price competitiveness even while solving a problem of time needed for aging of an adhesive after adhesion processing of a liquid crystal display. A pressure-sensitive adhesive transfer tape used in an article for a liquid crystal display is obtained by the steps of: coating one surface of a transparent polyester-based film(1) with a heavy-delamination release layer(2); coating the other surface of the polyester-based film with a soft-delamination release layer(3) to prepare a double-side release film(5); disposing an adhesive layer(4) on the heavy-delamination release layer; and winding the double-side release film into a roll so as to place the adhesive layer in the inner or outer surface of the double-side release film.

Description

Pressure sensitive adhesive transfer-tape used in article for liquid crystal display}

1 is a cross-sectional view showing an unfolded pressure-sensitive adhesive transfer tape of the present invention.

Figure 2 shows a cross section of the pressure-sensitive adhesive transfer tape of the present invention wound in a roll form.

TECHNICAL FIELD This invention relates to the adhesive transfer tape used for the member for liquid crystal displays, the laminated body of the member for liquid crystal display, and the manufacturing method of the laminated body of said member for liquid crystal display.

The term "member for liquid crystal display" means a polarizing plate and a retardation plate.

In the manufacturing process of a polarizing plate or a retardation plate, after a protective film is adhere | attached to a polarizing plate or a retardation plate, the opposite side is adhesive-processed and a peeling film is adhere | attached on the adhesion processing surface, or the adhesive film is adhesive-processed, The polarizing plate laminated body or the retardation plate laminated body is manufactured by adhering a polarizing plate or a retardation plate to an adhesion process surface.

In addition, in order to quickly respond to the delivery time of the polarizing plate laminate or the retardation plate laminate, a structure in which the adhesive is sandwiched between two peeling films having different peeling levels is used as a method for solving the time problem required for the ripening of the adhesive after the adhesive processing. The polarizing plate laminated body or the retardation plate laminated body is manufactured using the adhesive transfer tape with an eggplant (Unexamined-Japanese-Patent No. 2005-023169A, Unexamined-Japanese-Patent No. 2003-147288A, Unexamined-Japanese-Patent No. 2003-177241A).

However, as to the method of using the double-sided release film, document correction tape (Japanese Patent Laid-Open Publication No. 2006-205443A, Japanese Patent Application Laid-open No. Hei 11-302606A), double-sided release film for adhesive drug protection (Japanese Patent Laid-Open Publication No. 2005-263657A) and the like. Although reported in other fields, no application has yet been reported for an adhesive transfer tape, in particular, an adhesive transfer tape used in a member for liquid crystal display.

The present invention, using a double-sided release film, while solving the time problem required for the aging of the pressure-sensitive adhesive after the adhesive processing of the member for a liquid crystal display, an adhesive transfer tape having a high cost competitiveness compared to the conventional technology, a liquid crystal produced using the same An object of the present invention is to provide a laminate of a display member and a method of manufacturing the laminate of the liquid crystal display member.

The present invention is a heavy peeling release layer of the double-sided release film (5) manufactured by coating the heavy peeling release layer (2) on one side of the transparent polyester film (1) and the light peeling release layer (3) on the other side ( 2) A pressure-sensitive adhesive transfer used for a liquid crystal display member having a structure in which a pressure-sensitive adhesive layer (4) is laminated thereon and the pressure-sensitive adhesive layer (4) is wound in a roll shape such that the pressure-sensitive adhesive layer (4) is located inside or outside the double-sided release film (5). It relates to a tape, a laminate of a liquid crystal display and a member produced using the same, and a method of manufacturing a laminate of the liquid crystal display.

In the present invention, the term "member for liquid crystal display" means a polarizing plate and a retardation plate.

The polyester film 1 is transparent and is not particularly limited as long as the optical properties (transmittance, haze) are maintained. Examples thereof include polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, and the like. It can be used, and monoaxial or biaxially stretched polyester film may be used.

These resins may be used alone or in combination of two or more thereof. However, polyethylene terephthalate and polyethylene terephthalate are preferable from the viewpoint of heat resistance and ease of silicone release treatment on the surface. Also, in view of cost, polyethylene terephthalate is most preferred.

Although the thickness of a film is not specifically limited, either, It is preferable to set it as 10-100 micrometers in consideration of viewpoints of handling convenience, price, etc. at the time of use.

The release agent used for the light release release layer 3 is not particularly limited, but a silicone-based release agent having excellent peeling properties may be used. In particular, in consideration of the heat resistance of the substrate, it is preferable to use an addition-reaction type silicone releasing agent which is cured at a relatively low temperature among the silicone releasing agents, and a releasing agent which can combine heat and ultraviolet curing may be used.

As for the peeling strength between the light peeling release layer 3 and the adhesion layer 4, 10mN / 50mm-700mN / 50mm is preferable.

In particular, when apply | coating and hardening an addition reaction type | mold silicone mold release agent to a uniaxial stretched polyester film, it is preferable to dry and harden at the temperature of 130 degrees C or less. When dried and hardened | cured at temperature exceeding 130 degreeC, there exists a problem that a uniaxially-stretched polyester film heat-shrinks or distorts an orientation axis | shaft, and there exists a concern that the problem of reducing the precision in the foreign material inspection of a polarizing plate. Moreover, as a silicone type mold release agent which does not apply heat, ultraviolet curing type acrylic silicone, a mermercapto group containing silicone, and an epoxy group containing silicone can also be used.

The releasing agent of the heavy release mold release layer 2 is not particularly limited, but when the peeling film is peeled off from the polarizing plate or the retardation plate, the surface of the adhesive is damaged, so that the appearance does not deteriorate when the polarizing plate or the retardation plate is adhered to the glass or the like. The release agent which is easy to peel in the range which does not degrade residual adhesiveness is preferable.

As such a releasing agent, a silicone-based releasing agent having excellent peeling properties can be used.

As for the peeling strength between the heavy peeling release layer 2 and the adhesion layer 4, 700mN / 50mm-1200mN / 50mm are preferable.

There is no particular limitation on the coating amount of the release agent introduced to form the above peeling release layers (2) or (3), but in consideration of the peeling performance, 0.03 to ² g / m ² is preferable, and 0.05 to 0.4 g / m ² is more preferable.

Although the peeling force differs depending on the type of substrate, the peeling performance may be insufficient if it is less than 0.03 g / m ² , and if it exceeds ² g / m ² , the adhesive surface may be damaged when the peeling film is peeled off from the polarizing plate or the retardation plate. .

The release release layers (2) or (3) may be formed by applying a silicone-based release agent to a substrate by various methods such as gravure coating, Mayer bar coating, air knife coating, doctor knife coating, and the like. It can achieve by drying and hardening by methods, such as ultraviolet irradiation.

An antistatic layer may be introduced between the heavy release layer 2 and the polyester film 1 or between the light release layer 3 and the polyester film 1, and in some cases, both An antistatic layer can also be introduced into the. The introduction of the antistatic layer solves problems such as adhesion of dust due to static electricity generated when removing the release film, in order to laminate the pressure-sensitive adhesive layer on a polarizing plate or a retardation plate, or to laminate the polarizing plate or retardation plate on which the pressure-sensitive adhesive is laminated. For sake.

As a method of introducing an antistatic layer onto the surface of a polyester film, a method of depositing or coating an antistatic component such as a metal or a metal oxide, a method of coating a known antistatic agent, or the like is used.

Examples of the metal or metal oxide include metals such as aluminum, silicon, copper, silver, and indium, and oxides or composite oxides of such metals. However, in order to use in optical applications, it is preferable to have good transparency. The vapor deposition layer of indium oxide and silica is preferable.

The antistatic agent used in the method of coating the antistatic agent can be used without limitation as long as it does not inhibit the curing of the silicone-based release agent, for example, cationic surfactants (ammonium salt, sulfonium, phosphonium, etc.), anionic Surfactants, polyoxyethylene alkylamines, polyhydric alcohol derivatives, nonionic activators, 아민 alkylamine derivatives, alkyl phosphate amine salts, fatty acid esters, alkyldietanolamines, polystyrene glycol esters, amphoteric surfactants, organic Boron-based compounds, polythiophene, polyaniline, ionic functional group-containing polymers and the like can be used.

Such an antistatic agent may be coated by a method known on either or both sides of the polyester-based film (1). Specifically, methods such as gravure coating, Mayer coating, air knife coating, doctor knife coating and the like may be applied. The application amount of the antistatic agent is not particularly limited, and can be determined in consideration of the type of the antistatic agent and the antistatic performance required.

In the pressure-sensitive adhesive transfer tape of the present invention, the peeling force (F1) of the heavy peeling release layer (2) and the adhesive layer (4) and the ratio of the peeling force (F2) between the light peeling release layer (3) and the adhesive layer (4). It is preferable that (F1 / F2) is 1.5-5, and it is more preferable that it is especially 2-3. In the case where the ratio of F1 / F2 is less than 1.5, the pressure-sensitive adhesive layer is laminated on the polarizing plate or the retardation plate while the light release mold release layer 3 and the pressure-sensitive adhesive layer 4 of the roll-shaped pressure-sensitive adhesive transfer tape of the present invention are separated. In the process, the heavy release layer 2 and the pressure-sensitive adhesive layer 4 may be separated, which may cause a problem in observing a defect of the polarizing plate. On the other hand, when the ratio of F1 / F2 is 5 or more, the problem that the heavy release mold release layer 2 and the pressure-sensitive adhesive layer 4 are separated does not occur, but the polarizing plate or the phase difference plate on which the pressure-sensitive adhesive layer 4 is laminated is When laminating, the relatively strong force is required to remove the double-sided release film 5 may cause a problem that it is difficult to use.

All the adhesives conventionally used in this field can be applied to the adhesive layer 4 of the adhesive transfer tape of this invention. Therefore, the content described below should be understood as a specific example of the applicable pressure-sensitive adhesive.

As the main component of the pressure-sensitive adhesive composition used in the present invention, various types of acrylic, silicone, rubber, urethane, polyester, epoxy copolymers and the like can be used, but an acrylic copolymer is preferred among them.

Examples of the pressure-sensitive adhesive composition comprising an acrylic copolymer include a) an acrylic copolymer including a crosslinking agent and a crosslinkable functional group, b) a crosslinking agent such as an isocyanate-based, epoxy-based, aziridine-based, amine-based or sulfur-based c / silane coupling agent. Pressure-sensitive adhesive composition comprising a can be used.

As said acryl-type copolymer, the (meth) acrylic acid ester monomer for homopolymer manufacture which has a glass transition temperature of -90-10 degreeC, the vinyl monomer containing the functional group which can bridge | crosslink isocyanate, and the other acryl-type monomer obtained by copolymerizing as needed Copolymers can be used.

In the present invention, "(meth) acryl" means "methacryl" or "acryl".

The copolymer including the (meth) acrylic acid ester monomer for preparing a homopolymer having a glass transition temperature of -90 to 10 ° C. reinforces cohesion by controlling the content of a vinyl monomer including a functional group that can be crosslinked with isocyanate in the copolymer. Adhesion durability and cutting property can be improved, or stress relaxation property can be improved.

Preferably, the (meth) acrylic acid ester monomer for producing a homopolymer having a glass transition temperature of -90 to 10 ° C is preferably a (meth) acrylic acid ester monomer for producing a homopolymer having a glass transition temperature of -80 to -10 ° C. It is preferable that 85 to 99.9 parts by weight is contained in 100 parts by weight of the acrylic copolymer, and more preferably 90 to 95 parts by weight is copolymerized.

In this case, when the content of the monomer exceeds 99.9 parts by weight may result in a weakening of the pressure-sensitive adhesive durability, less than 85 parts by weight may weaken the initial adhesion and stress relaxation action.

The vinyl monomer containing the functional group which can be crosslinked with the isocyanate is contained in 0.1 parts by weight to 15 parts by weight in 100 parts by weight of the acrylic copolymer, and preferably 1 to 8 parts by weight is copolymerized. In this case, when the content of the monomer containing the cross-linking functional group exceeds 15 parts by weight, the residual stress relaxation effect is relatively low, and when less than 0.1 part by weight, the cohesive force of the pressure-sensitive adhesive is small to impair the adhesive durability and cutting properties do.

It is preferable that 0.1-15 weight part is contained in 100 weight part of acrylic copolymers, and, as for the said other acrylic monomer, it is more preferable to add 1-8 weight part and to copolymerize. In this case, when the content of the other acrylic monomers exceeds 15 parts by weight, the residual stress relaxation effect is relatively low, and when less than 0.1 parts by weight, the cohesive force of the pressure-sensitive adhesive is small, resulting in damage to the adhesive durability and cutting properties. do.

Examples of the (meth) acrylic acid ester monomer for producing a homopolymer having a glass transition temperature of -90 to 10 ° C include n-octyl acrylate, 2-ethylhexyl acrylate, 2-ethylbutyl acrylate, hexyl acrylate and heptyl acrylate. , Nonyl acrylate, pentyl acrylate, isooctyl acrylate, n-decyl methacrylate, n-dodecyl methacrylate, n-butyl acrylate, isobutyl acrylate, propyl acrylate, ethyl acrylate, methyl acryl Elate, 3-methylbutyl acrylate, n-hexyl methacrylate, n-octyl methacrylate, n- tetradecyl methacrylate, etc. These monomers can be used individually or in mixture of 2 or more types.

In addition, examples of the vinyl monomer containing a functional group capable of crosslinking with the isocyanate include acrylic acid, methacrylic acid, acrylic acid duplex, itaconic acid, maleic acid, 2-hydroxyethyl (meth) acrylate, and 2-hydroxypropyl. (Meth) acrylate, 2-hydroxyethylene glycol (meth) acrylate, 2-hydroxypropylene glycol (meth) acrylate, acrylamide, and the like, but are not limited thereto, and in addition to hydroxyl, carboxyl or All vinyl-based monomers containing a group may be used. These monomers can be used individually or in mixture of 2 or more types.

In the present invention, an acrylic copolymer may be prepared by copolymerizing the monomer having the above-described composition, and the molecular weight of the acrylic copolymer is preferably in the range of 200,000 to 2,500,000 by weight average molecular weight in consideration of adhesive properties and coating properties. .

The method for producing the acrylic copolymer is not particularly limited, and may be prepared by solution polymerization, photopolymerization, bulk polymerization, suspension polymerization or emulsion polymerization. Preferably, the acrylic copolymer is prepared using a solution polymerization method, and the polymerization temperature is preferably 50 to 110 ° C, and it is preferable to add the initiator in a state where the monomers are uniformly mixed.

A well-known crosslinking agent can be added to the adhesive composition used for this invention in order to strengthen cohesion force. Examples of such crosslinking agents include polyisocyanate compounds such as triylene diisocyanate, xylene diisocyanate, hexamethylene diisocyanate, diisocyanate compounds such as 2,4- or 4,4-diphenylmethane diisocyanate, and a tree of such diisocyanates. Adducts with polyhydric alcohol-based compounds such as metyrolpropane can be used; Melamine derivatives such as hexamethyrolmelamine, hexamethoxymethylmelamine, hexabutoxymethylmelamine and the like can be used, and also polyepoxy compounds such as bisphenol A. epichlorohydrin condensate type epoxy compounds, polyoxyal chelene Polyglycidyl ethers of polyols, glycerin di- or triglycidyl ethers, tetraglycidyl xylenediamine and the like; Although a crosslinking agent of polyaziridine may be used, it is preferable to use a polyisocyanate-based crosslinking agent, and these may be used by mixing with each other. It is preferable that they are used in 1-15 weight part with respect to 100 weight part of acrylic copolymer solid content, More preferably, it is 1-5 weight part. If it exceeds 15 parts by weight, there is a problem in relieving residual stress due to excessive crosslinking reaction, and if it is less than 1 part by weight, the cohesion force becomes small due to insufficient crosslinking degree, resulting in damage to adhesive durability and cutting properties.

A well-known silane coupling agent can also be added to the adhesive composition used for this invention. As this silane coupling agent, the silane coupling agent containing an epoxy group is preferable, for example, gamma glycidoxy propyl trimethoxysilane can be used. The epoxy group in the silane coupling agent molecule binds to the reactive functional group of the copolymer, and the alkoxysilane portion strongly bonds to the substrate to which the adhesive is applied, such as the glass substrate of the liquid crystal cell, thereby connecting the adhesive to the substrate such as the liquid crystal cell. Therefore, it improves the adhesion stability, and further improves the heat and moisture resistance characteristics, and in particular, serves to help improve the adhesion reliability when left for a long time under high temperature and high humidity. The content of the silane coupling agent is preferably used in 0.01 to 1 part by weight based on 100 parts by weight of the copolymer.

When the adhesive composition of this invention considers the optimal balance of physical properties, it is preferable that the crosslinking density of an adhesive is 5 to 100%, Preferably it is the range of 60 to 95%. The above-mentioned crosslinking density can be obtained by measuring the amount of the crosslinked structure which is not dissolved in a solvent through a gel content measurement method of a generally known acrylic pressure sensitive adhesive.

In addition, the pressure-sensitive adhesive composition of the present invention may further include a tackifier resin in order to adjust the adhesive performance, the content of a) can be used in the range of 1 to 100 parts by weight based on 100 parts by weight of the copolymer solids. At this time, when the tackifying resin is used in excess of 100 parts by weight may be reduced the compatibility or cohesion of the pressure-sensitive adhesive should be added appropriately with care. Examples of the tackifying resins include (hydrogenated) hydrocarbon resins, (hydrogenated) rosin resins, (hydrogenated) rosin ester resins, (hydrogenated) terpene resins, (hydrogenated) terpene phenol resins, polymerized rosin resins, and polymerized rosin Ester resin etc. are mentioned, These can be used individually or in mixture of 2 or more types.

In addition to the pressure-sensitive adhesive composition of the present invention, a plasticizer, an epoxy resin, a curing agent, or the like may be further mixed and used for a specific purpose, and an ultraviolet stabilizer, an antioxidant, a colorant, a reinforcing agent, a filler, or the like may be appropriately added according to a general purpose. .

In particular, the pressure-sensitive adhesive composition used in the present invention preferably has an antistatic performance, and in order to impart antistatic performance, a known antistatic agent may be added to the pressure sensitive adhesive composition.

Application | coating of an adhesive can be performed using a die coater, a gravure roll coater, a comma coater, an air knife coater, etc. 5-100 micrometers is preferable and, as for the thickness of the adhesive layer 4, about 10-30 micrometers are especially preferable. The adhesive force of the pressure-sensitive adhesive layer 4 is preferably 1 to 25 N / 25 mm as the adhesive force to the glass adherend, and the optical transmittance (total light transmittance) is preferably 95% or more because it is used for optical applications. Here, the transmittance | permeability is the value which measured the transmittance | permeability in the state which adhered the adhesive of an adhesive transfer tape to the quartz plate of thickness 3mm, and peeled off the peelable film 5.

The method of laminating | stacking an adhesive to liquid crystal display apparatuses, such as a polarizing plate and a phase difference plate using said adhesive transfer tape,

When the pressure-sensitive adhesive layer 4 is in the form of a roll wound toward the inside of the double-sided release film 5, the pressure-sensitive adhesive layer of the pressure-sensitive adhesive transfer tape wound on the outside from the light peeling release layer 3 of the pressure-sensitive adhesive transfer tape wound inside ( 4) While peeling, the peeled surface is laminated on the polarizing plate or the retardation plate,

When the pressure-sensitive adhesive layer 4 is in the form of a roll wound to the outside of the double-sided release film 5, the light-peelable release layer of the pressure-sensitive adhesive transfer tape wound on the outside from the pressure-sensitive adhesive layer 4 of the pressure-sensitive adhesive transfer tape wound inside ( The adhesive layer 4 of the opposite side is laminated | stacked on a polarizing plate or a phase difference plate, peeling 3).

By this method, a polarizing plate or a retardation plate laminated body can be obtained simply.

In addition, the laminate of the polarizing plate or the retardation plate in which the pressure-sensitive adhesive layer is laminated in the above manner may form a liquid crystal display by peeling the release film from the heavy release layer 2 and attaching it to the liquid crystal panel.

Hereinafter, the present invention will be described in more detail with reference to examples, but the scope of the present invention is not limited to the examples.

Example  1: Production of double-sided release film

On one side of the monoaxial transversely stretched film (350 cmX500 cm) of Dongyang Spinning Co., Ltd., which has a thickness of 38 μm, ester K1581, polyethylene terephthalate, and 100 parts by weight of SRX-211 of Toure Dow Corning Silicone Co., Ltd., an addition reaction type silicone release agent. The release agent which added 2 weight part of SRX-212, and added 20 weight part of X92-128 of Shin-Etsu Chemical Co., Ltd. as a release additive was apply | coated so that solid content might be 0.2 g / m <^2> using the automatic coating machine with a baker applicator. After drying for 60 seconds in a hot air circulation oven at 110 ° C., the heavy release mold layer 2 was introduced onto the polyester film.

In addition, 2 parts by weight of SRX-212 was added as a catalyst to 100 parts by weight of SRX-211 of Tow Dow Corning Silicone Co., Ltd. on the opposite side to which the heavy release mold layer 2 of the polyester was introduced, and the solid content was 0.2 g. / m ² was applied, and then dried in a hot air circulation oven at 110 ° C. for 60 seconds to introduce a light release mold release layer 3 onto a polyester film to prepare a double release film.

Example  2: Adhesive  Acrylic system Polymer  Produce

A 4-neck jacketed reactor (1 L) was equipped with a stirrer, a thermometer, a reflux condenser, a dropping lot, and a nitrogen gas inlet tube, 164 parts of ethyl acetate, 126 parts of n-butyl acrylate, and methyl methacrylate 10 4 parts of acrylic acid and 5 parts of 2-hydroxyethyl acrylic acid were added, and the external temperature of the reactor was raised to 50 ^° C. A solution containing 0.14 parts of 2,2'-azobisisobutyronitrile (AIBN) completely dissolved in 10 parts of ethyl acetate was added dropwise. After an additional 5 hours of reaction while maintaining the jacket outside temperature at 50 ^° C., 90 g of ethyl acetate was slowly added dropwise using a dropping lot for 1 hour. Furthermore, after 6 hours of additional stirring at the same temperature, 304 g of ethyl acetate was added, followed by further stirring for 2 hours, and having an organic acid group in a side chain of 20% by weight of solid content and a weight average molecular weight (polystyrene equivalent) of about 1.5 million by GPC method. A (meth) acrylate copolymer was obtained.

Example  3: Preparation of Adhesive Transfer Tape

To 500 g (100 parts by weight) of the copolymer having a concentration of 20% by weight obtained in Example 2, N, N, N ', N'-tetraglycidyl xylenediamine [trade name: "TETRAD-X"] as a crosslinking agent 10 g ethyl acetate solution (1 part solids), 10 g ethyl acetate solution (1 part solids) of [coronate-L], and [KBM-403] gamma glycidoxy propyl trimethoxysilane as a silane coupling agent 0.3 g (> 95% purity) was added thereto, followed by vigorous stirring for 30 minutes to form a uniform mixed solution. The combined solution of the Example 1 the jungbak richeung silicone release agent dry film is 25μm thick on the coated film (350cmX500cm) on top of double-sided release film produced in an area is 310cm × 470cm the coating and of 100 ^o C × 2 minutes for Condition-dried, 40 cm in length and 1.2 cm in diameter were wound on a glass rod so that the pressure-sensitive adhesive layer was in roll form located inside the double-sided release film to prepare a long rod-shaped pressure-sensitive transfer tape, and the surface was Packed once again, and fixed to the outside by using an adhesive tape for office, sealed in a sealing bag to prevent air flow, curing for 14 days in a 25 ^° C, 50% constant temperature and humidity humidifier to transfer the adhesive transfer tape using a double-sided release film Completed.

Example  4: Evaluation of Adhesive Transfer Tape

While laminating | stacking an adhesive layer on a polarizing plate, unwinding so that the light peeling release layer 3 and the adhesive layer 4 of the adhesive transfer tape obtained by said Example # 3 were isolate | separated, it laminated | stacked with a laminator and produced the adhesive / polarizing plate laminated body, The visual observation of the adhesive residue on the light peeling release layer and the lifting phenomenon of the heavy peeling release layer (2) and the pressure-sensitive adhesive layer of the laminate showed no adhesive left on the light peeling release layer, and the heavy peeling release layer and pressure-sensitive adhesive. It was confirmed that there was no lifting phenomenon between.

In the present invention, the pressure-sensitive adhesive transfer tape uses one sheet of double-sided release film, and uses less one sheet of polyester-based film, compared to the conventional technology of using two sheets of double-sided release film, and thus, the adhesive on the polarizing plate Since the amount of waste release film generated after the layer lamination process is reduced, it can double the cost competitiveness.

Claims (7)

On the heavy release layer 2 of the double-sided release film 5 produced by coating the heavy release layer 2 on one side of the transparent polyester film (1) and the light release layer 3 on the other side A pressure-sensitive adhesive transfer tape used for a liquid crystal display member having a structure in which a pressure-sensitive adhesive layer (4) is laminated and the pressure-sensitive adhesive layer (4) is wound in a roll shape such that the pressure-sensitive adhesive layer (4) is located inside or outside the double-sided release film (5). The pressure-sensitive adhesive transfer tape according to claim 1, wherein the heavy release mold release layer (2) and the light release mold release layer (3) are formed of a silicone type release agent. The peeling strength at the time of peeling the adhesive layer 4 from the said light peeling release layer 3 is 10 mN / 50mm-700mN / 50mm, The adhesive layer 4 from the said heavy peeling release layer 2 The peel strength at the time of peeling is 700mN / 50mm-1200mN / 50mm, The peeling force of the said heavy peeling release layer 2 and the adhesion layer 4 is called F1, and the light peeling release layer 3 and the adhesion layer 4 F1 / F2 is 1.5-5, when the peeling force of) is F2, The adhesive transfer tape used for the member for liquid crystal displays characterized by the above-mentioned. The antistatic layer according to claim 1 is introduced between the heavy release layer 2 and the polyester film 1 or between the light release layer 3 and the polyester film 1, or both. An antistatic layer is introduced into the pressure-sensitive adhesive transfer tape used for the liquid crystal display member. The pressure-sensitive adhesive transfer tape according to claim 1, wherein the pressure-sensitive adhesive layer (4) has an antistatic performance. The laminated body of the member for liquid crystal display including the adhesive layer laminated | stacked using the adhesive transfer tape of any one of Claims 1-5. When the pressure-sensitive adhesive layer 4 is in the form of a roll wound toward the inside of the double-sided release film 5, the pressure-sensitive adhesive layer of the pressure-sensitive adhesive transfer tape wound on the outside from the light peeling release layer 3 of the pressure-sensitive adhesive transfer tape wound inside ( 4) The peeled surface is laminated on the member for liquid crystal display, When the pressure-sensitive adhesive layer 4 is in the form of a roll wound to the outside of the double-sided release film 5, the light-peelable release layer of the pressure-sensitive adhesive transfer tape wound on the outside from the pressure-sensitive adhesive layer 4 of the pressure-sensitive adhesive transfer tape wound inside ( 3) The method of manufacturing a laminate of a member for a liquid crystal display device using the pressure-sensitive adhesive transfer tape according to any one of claims 1 to 5, wherein the opposite pressure-sensitive adhesive layer 4 is laminated on the member for liquid crystal display, while peeling off. .

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