KR101658608B1 - Double sided adhesive tapes and methods of manufacturing the same - Google Patents

Abstract

The double-sided pressure-sensitive adhesive tape comprises a base layer, an intermediate layer disposed on the base layer and formed from an acrylic binder containing an organic chemical additive containing a diacrylate material, and a plurality of acrylic resins disposed on the bottom surface of the base layer and on the upper surface of the intermediate layer, A first pressure-sensitive adhesive layer and a second pressure-sensitive adhesive layer formed from a mixture of monomers including a carboxylate compound and a latex compound and an acrylic acid. The chemical and mechanical properties of the double-sided pressure-sensitive adhesive tape can be improved from the composition of the intermediate layer and the pressure-sensitive adhesives.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-sided pressure-sensitive adhesive tape,

The present invention relates to a double-sided pressure-sensitive adhesive tape and a method for producing the same. More particularly, the present invention relates to a double-sided pressure-sensitive adhesive tape having a laminated structure and a method of producing the same.

BACKGROUND ART In recent years, double-sided tapes including Pressure Sensitive Adhesive (PSA) have been applied to electronic devices such as mobile phones, displays, touch screen panels (TSP) and the like for bonding or laminating components.

The double-sided tape is required to have properties such as chemical resistance and external impact absorbing ability against contaminants such as moisture and oil penetrating from the outside of the electronic device. A tape structure in which a plurality of layers are laminated is developed for satisfying the physical properties.

For example, Patent Document 1 discloses a double-sided tape including a PSA, a foamed carrier layer, and the like.

1. Korean Patent Publication No. 10-2010-0004869 (Aug. 27, 2012)

An object of the present invention is to provide a double-sided pressure-sensitive adhesive tape having excellent chemical and mechanical properties.

An object of the present invention is to provide a method for producing a double-sided pressure-sensitive adhesive tape having excellent chemical and mechanical properties.

It is to be understood, however, that the present invention is not limited to the above-described embodiments and various modifications may be made without departing from the spirit and scope of the invention.

In order to accomplish one aspect of the present invention, a double-sided tape according to exemplary embodiments of the present invention includes a base layer, an acrylic binder disposed on the base layer and containing a chemical additive including a diacrylate material And a first pressure-sensitive adhesive layer and a second pressure-sensitive adhesive layer formed from a monomer mixture disposed on the bottom surface of the base layer and the upper surface of the intermediate layer, respectively, and including a plurality of acrylate compounds and acrylic acid.

According to exemplary embodiments, the base layer may have a thickness from about 10 [mu] m to about 75 [mu] m.

According to exemplary embodiments, the acrylic binder contained in the intermediate layer may comprise butyl acrylate, vinyl acetate, acrylic acid, and the chemical additive.

According to exemplary embodiments, the acrylic binder comprises from about 80 wt% to about 90 wt% of butyl acrylate, from about 2 wt% to about 10 wt% of vinyl acetate, from about 2 wt% to about 10 wt% By weight of acrylic acid, and from about 0.5% to about 1% by weight of said chemical additive.

According to exemplary embodiments, the chemical resistant additive may comprise a diacrylate of a dialcohol-based compound.

According to exemplary embodiments, the intermediate layer comprises about 70 wt% to about 90 wt% of the acrylic binder, about 1 wt% to about 8 wt% of a curing agent, about 3 wt% to about 8 wt% From about 3 wt.% To about 8 wt.% Of pore particles, and from about 2 wt.% To about 8 wt.% Of a dispersant, and may have an acrylic foam structure.

According to exemplary embodiments, the pore particles comprise a polymer coating layer, and may include micropores having an average particle size in the range of about 20 [mu] m to about 60 [mu] m.

According to exemplary embodiments, the intermediate layer may have a thickness of from about 50 [mu] m to about 150 [mu] m.

According to exemplary embodiments, the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer may comprise an acrylic copolymer, ethyl acetate and a solvent formed from the monomer mixture.

According to exemplary embodiments, the monomer mixture may comprise 2-ethylhexyl acrylate, butyl acrylate, vinyl acrylate, cyclohexylmethyl acrylate, and acrylic acid.

According to exemplary embodiments, the monomer mixture comprises about 45 wt% to about 55 wt% 2-ethylhexyl acrylate, about 5 wt% to about 15 wt% butyl acrylate, about 5 wt% to about 15 wt% By weight of vinyl acrylate, from about 15% to about 25% by weight of cyclohexylmethyl acrylate, and from about 5% to about 15% by weight of acrylic acid.

According to exemplary embodiments, each of the first pressure sensitive adhesive layer and the second pressure sensitive adhesive layer may have a thickness of from about 20 [mu] m to about 125 [mu] m.

According to exemplary embodiments, the double-sided adhesive tape may further include a release layer attached on the bottom surface of the first pressure-sensitive adhesive layer.

According to a method of manufacturing a double-sided tape according to exemplary embodiments of the present invention for achieving the above-described object of the present invention, a base layer is manufactured. An intermediate layer is formed on the base layer by applying a composition containing an acrylic binder containing a diacrylate material, a hardener, an anchor agent, a dispersant, and pore particles containing a chemical additive. A pressure-sensitive adhesive containing an acrylic copolymer, ethyl acetate and a solvent is applied on the bottom surface of the base layer and the top surface of the intermediate layer to form a first pressure-sensitive adhesive layer and a second pressure-sensitive adhesive layer.

According to exemplary embodiments, the composition used for forming the intermediate layer comprises about 70% to about 90% by weight of the acrylic binder, about 1% to about 8% by weight of the curing agent, about 3% About 8 wt% of the anchor agent, about 3 wt% to about 8 wt% of the pore particles, and about 2 wt% to about 8 wt% of the dispersing agent.

According to exemplary embodiments, the acrylic binder comprises about 80 wt% to about 90 wt% of butyl acrylate, about 2 wt% to about 10 wt% of vinyl acetate, about 2 wt% to about 10 wt% Acid, and from about 0.5% to about 1% by weight of said chemical additive.

According to exemplary embodiments, the pressure-sensitive adhesive may comprise about 30 wt% to about 35 wt% of the acrylic copolymer, about 40 wt% to about 43 wt% ethyl acetate, and about 13 wt% To about 15% by weight of toluene, and from about 10% to about 12% by weight of acetone.

According to exemplary embodiments, the acrylic copolymer comprises from about 45 wt% to about 55 wt% 2-ethylhexyl acrylate, from about 5 wt% to about 15 wt% butyl acrylate, from about 5 wt% From about 15 weight percent to about 15 weight percent vinyl acrylate, from about 15 weight percent to about 25 weight percent cyclohexylmethyl acrylate, and from about 5 weight percent to about 15 weight percent acrylic acid.

As described above, according to exemplary embodiments of the present invention, the double-sided adhesive tape may include an intermediate layer containing an organic chemical additive, and pressure-sensitive adhesive layers formed from plural kinds of acrylates. By optimizing the composition, thickness, structure, etc. of the intermediate layer and the pressure-sensitive adhesive layer, it is possible to manufacture a double-faced pressure-sensitive adhesive tape having improved impact resistance, chemical resistance,

1 is a cross-sectional view showing a double-sided adhesive tape structure according to exemplary embodiments.
Fig. 2 is a flowchart for explaining a method of manufacturing a double-faced pressure-sensitive adhesive tape according to exemplary embodiments.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. In the accompanying drawings, the dimensions of the structures are enlarged to illustrate the present invention in order to clarify the present invention.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises ", or" having ", and the like, are intended to specify the presence of stated features, integers, steps, operations, elements, or combinations thereof, , Steps, operations, elements, or combinations thereof, as a matter of principle, without departing from the spirit and scope of the invention.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

1 is a cross-sectional view showing a double-sided adhesive tape structure according to exemplary embodiments.

1, the double-sided tape includes a first pressure-sensitive adhesive layer 30, a base layer 10, an intermediate layer 20 and a second pressure-sensitive adhesive layer 40 which are sequentially laminated on a release layer 50 .

The base layer 10 may be provided as a substrate or a support layer of the double-sided pressure-sensitive adhesive tape. According to exemplary embodiments, the base layer 10 may comprise a material having tack and peel properties. For example, the base layer 10 may include plastic materials such as polyester series, polycarbonate series, polyimide series, etc., such as polyethylene terephthalate (PET).

According to exemplary embodiments, the thickness of the base layer 10 may have a value ranging from about 10 micrometers (占 퐉) to about 75 micrometers (占 퐉).

When the thickness of the base layer 10 is less than about 10 mu m, the overall mechanical stability of the double-sided pressure-sensitive adhesive tape may be deteriorated. If the thickness of the base layer 10 exceeds about 75 탆, it is uneconomical and the thickness of the double-sided pressure-sensitive adhesive tape may excessively increase. In some embodiments, the base layer 10 may be formed to a thickness of from about 40 microns to about 75 microns for mechanical stability of the double-sided pressure-sensitive adhesive tape.

According to exemplary embodiments, the base layer 10 may be substantially transparent.

In some embodiments, the base layer 10 may be tinted. Thus, unnecessary external light can be absorbed when the base layer 10 is applied to a TSP, a display device, or the like. For example, the base layer 10 may include a black material such as carbon black or graphite powder therein. In one embodiment, a carbon film, a metal film, or the like for coloring treatment may be further added on the upper surface and / or the lower surface of the base layer 10.

The intermediate layer 20 may be formed on the upper surface of the base layer 10. The intermediate layer 20 can be formed to reinforce the chemical and mechanical properties of the double-faced pressure-sensitive adhesive tape such as resistance to moisture, chemical resistance, impact resistance, and anti-rebound properties.

The intermediate layer 20 may have an acrylic foam structure formed from an acryl binder. For example, the intermediate layer 20 may have the acrylic foam structure formed by mixing the acrylic binder, the curing agent, the anchor agent, and the dispersing agent.

In some embodiments, the acrylic binder may comprise a mixture of butyl acrylate, vinyl acetate, acrylic acid, and chemical additives.

The chemical resistant additive may be added to the acrylic binder of the intermediate layer 20 to improve the chemical stability against penetration of moisture, oil, etc. from the outside. In exemplary embodiments, a diacrylate material may be used as the chemical resistant additive. For example, a diacrylate material of a dialcohol-based compound such as dimethanol may be used as the chemical additive.

The curing agent may be combined with the functional groups of the acrylic binder to elongate the polymerization chain and increase the molecular weight of the acrylic foam. Thus, the characteristics of the intermediate layer 20 such as the chemical resistance, the impact resistance, the anti-rebound property, etc. can be enhanced.

As the curing agent, an epoxy compound, a melamine compound, an isocyanate compound, a metal chelate compound, or an amine compound may be used. These may be used alone or in combination of two or more.

The anchoring agent may be added together with the curing agent to improve the consistency between the intermediate layer 20 and the base layer 10. In some embodiments, the anchoring agent may comprise a silane compound and / or a synthetic resin such as a urethane resin.

The dispersant may be added to maintain uniform distribution of the acrylic binder in the intermediate layer 20. In some embodiments, the dispersing agent may include a sulfonic acid, a phosphate, an ester, an amide, a cellulose, a polyhydric alcohol, a compound of the formalin series, and the like. These may be used alone or in combination of two or more. In one embodiment, the sulfonic acid-based compound may be used as the dispersant in consideration of chemical stability and ease of storage.

According to exemplary embodiments, the intermediate layer 20 may further include pore particles 25. The intermediate layer 20 can have a closed cell structure by the pore particles 25, and thus the impact resistance, the chemical resistance and the moisture permeability can be further strengthened.

The pore particles 25 may include a pearl including a hollow therein. For example, the average particle size of the pore particles 25 may have a value in the range of about 20 [mu] m to about 60 [mu] m. When the average particle size of the pore particles 25 is less than about 20 탆, the pore particles 25 are hardly evenly dispersed in the intermediate layer 20. When the average particle size of the pore particles 25 exceeds about 60 탆, it may be difficult to adjust the thickness of the intermediate layer 20 to a predetermined range.

The pore particles 25 include the hollow formed therein, and the hollow may be surrounded by a polymer coating layer such as an acrylonitrile copolymer. In some embodiments, the surface of the porous particles 25, such as the surface of the polymer coating layer, may be surface treated with an inorganic material such as calcium carbonate. Thus, the dispersibility of the pore particles 25 can be further improved.

According to exemplary embodiments, the intermediate layer 20 may have a thickness of about 50 [mu] m to 150 [mu] m. When the thickness of the intermediate layer 20 is less than about 50 탆, it is difficult to ensure sufficient impact resistance and anti-rebound properties of the double-stick adhesive tape. When the thickness of the double-sided pressure-sensitive adhesive tape exceeds about 150 탆, the thickness of the double-sided pressure-sensitive adhesive tape may be excessively increased. In some embodiments, the intermediate layer 20 may be formed to a thickness of about 60 [mu] m to about 150 [mu] m for sufficient impact resistance, anti-rebound properties.

According to some embodiments, the intermediate layer 20 comprises about 70 wt% to about 90 wt% of the acrylic binder, about 1 wt% to about 8 wt% of the hardener, and about 3 wt% to about 8 wt% From about 3 wt% to about 8 wt% of the pore particles, and from about 2 wt% to about 8 wt% of the dispersant.

In some embodiments, the intermediate layer 20 may further include a black ink material. As a result, the light interception or light absorption function can be reinforced in the intermediate layer 20. A black carbon material having a nano size particle size may be used as the black ink material in consideration of the compatibility with the acrylic binder and the reactivity.

The first pressure sensitive adhesive layer 30 and the second pressure sensitive adhesive layer 40 may be formed on the bottom surface of the base layer 10 and the top surface of the intermediate layer 20, respectively. The first pressure sensitive adhesive layer (30) and the second pressure sensitive adhesive layer (40) may be formed from, for example, a pressure sensitive adhesive (PSA) containing an acrylic copolymer.

The PSA may include the acrylic copolymer, ethyl acetate, and acetone and toluene as solvents. In some embodiments, the PSA comprises from about 30 wt% to about 35 wt% of the acrylic copolymer, from about 40 wt% to about 43 wt% ethyl acetate, from about 13 wt% to about 15 wt% From about 10% to about 12% by weight of acetone.

The acrylic copolymer may be formed from a mixture of monomers comprising a plurality of acrylate-based compounds and acrylic acid. The monomer mixture may include 2-ethylhexyl acrylate, butyl acrylate, vinyl acrylate, cyclohexylmethyl acrylate, and acrylic acid. In some embodiments, the monomer mixture comprises about 45 wt% to about 55 wt% 2-ethylhexyl acrylate, about 5 wt% to about 15 wt% butyl acrylate, about 5 wt% to about 15 wt% % Of vinyl acrylate, from about 15 wt% to about 25 wt% cyclohexylmethyl acrylate, and from about 5 wt% to about 15 wt% acrylic acid.

According to some embodiments, the first pressure-sensitive adhesive layer 30 and the second pressure-sensitive adhesive layer 40 comprise a functional group such as a carboxyl group, and the monomer mixture may include cyclohexylmethyl acrylate. Thus, the chemical resistance to moisture or oil and the adhesion to the object can be improved.

In the exemplary embodiments, the first pressure-sensitive adhesive layer 30 and the second pressure-sensitive adhesive layer 40 may each have a thickness of from about 20 [mu] m to about 125 [mu] m. When the thickness of each of the first pressure sensitive adhesive layer 30 and the second pressure sensitive adhesive layer 40 is less than about 20 占 퐉, it may be difficult to secure a sufficient adhesive force to the object. If the thickness of each of the first pressure sensitive adhesive layer 30 and the second pressure sensitive adhesive layer 40 exceeds about 125 탆, the thickness of the pressure sensitive adhesive double coated tape may be excessively increased.

The release layer 50 may be adhered to the bottom surface of the first pressure sensitive adhesive layer 30. The release layer 50 may be added for ease of transportation and storage of the double-sided pressure-sensitive adhesive tape. For example, a liner film of a silicon-based, polyethylene-based, or paper-based material can be used as the release layer 50.

Fig. 2 is a flowchart for explaining a method of manufacturing a double-faced pressure-sensitive adhesive tape according to exemplary embodiments. Detailed description of the materials, compositions and the like described with reference to Fig. 1 will be omitted.

Referring to FIG. 2, the base layer 10 is prepared in step S10. In one embodiment, the base layer 10 has a thickness of from about 10 microns to about 75 microns, for example, a transparent PET film can be used. In some embodiments, a PET film colored with a carbon-based material may be used.

In step S20, the intermediate layer 20 may be formed on the base layer 10. [

According to some embodiments, a composition comprising an acrylic binder, a hardener, an anchoring agent, a dispersant, and pore particles 25 is applied on the base layer 10, and then a predetermined curing process such as heat treatment is performed to form an intermediate layer 20 may be formed. The intermediate layer 20 may be formed to a thickness of about 50 m to 150 m.

The acrylic binder may comprise a mixture of butyl acrylate, vinyl acetate, acrylic acid, and chemical resistance additives. As the chemical resistant additive, for example, a diacrylate material based on a dialcohol may be used. In some embodiments, the acrylic binder comprises from about 80 weight percent to about 90 weight percent butyl acrylate, from about 2 weight percent to about 10 weight percent vinyl acetate, from about 2 weight percent to about 10 weight percent acrylic acid, , And from about 0.5% to about 1% by weight of the chemical additive.

According to exemplary embodiments, the mixed solution may be prepared by mixing the toluene with the pore particles (25) as the solvent and the dispersing agent and stirring for about 15 minutes to about 20 minutes. After the mixed solution and the acrylic binder are mixed and stirred for about 15 minutes to about 20 minutes, the curing agent and the anchor agent are added, and the mixture is further stirred for about 30 minutes to about 45 minutes to prepare the composition.

According to some embodiments, the ingredients for forming the intermediate layer 20 comprise about 70 wt% to about 90 wt% of the acrylic binder, about 1 wt% to about 8 wt% of the curing agent, about 3 wt% About 8 wt% of the pore particles, about 3 wt% to about 8 wt% of the pore particles, and about 2 wt% to about 8 wt% of the dispersant.

The first pressure sensitive adhesive layer 30 and the second pressure sensitive adhesive layer 40 may be formed on the bottom surface of the base layer 10 and the upper surface of the intermediate layer 20, respectively, in step S30. The first pressure sensitive adhesive layer 30 and the second pressure sensitive adhesive layer 40 may each be formed to a thickness of about 20 μm to about 125 μm.

According to exemplary embodiments, the first pressure sensitive adhesive layer 30 and the second pressure sensitive adhesive layer 40 are formed on the bottom surface of the base layer 10 and the upper surface of the intermediate layer 20 by using an acrylic copolymer, ethyl acetate (ethyl acetate) and a pressure-sensitive adhesive containing acetone and toluene as a solvent. In one embodiment, the pressure sensitive adhesive comprises from about 30 wt% to about 35 wt% of the acrylic copolymer, from about 40 wt% to about 43 wt% ethyl acetate, from about 13 wt% to about 15 wt% And from about 10% to about 12% by weight of acetone.

The acrylic copolymer may be formed from a mixture of monomers comprising a plurality of acrylate-based compounds and acrylic acid. In one embodiment, the monomer mixture comprises about 45 wt% to about 55 wt% 2-ethylhexyl acrylate, about 5 wt% to about 15 wt% butyl acrylate, about 5 wt% to about 15 wt% By weight of vinyl acrylate, from about 15% to about 25% by weight of cyclohexylmethyl acrylate, and from about 5% to about 15% by weight of acrylic acid.

In step S40, for example, the release layer 50 may be adhered to the bottom surface of the first pressure-sensitive adhesive layer 30 to obtain the double-sided pressure-sensitive adhesive tape.

Hereinafter, the characteristics of the double-faced pressure-sensitive adhesive tape according to the exemplary embodiments will be described in more detail by way of specific examples.

Double-sided pressure-sensitive adhesive tapes of Examples and Comparative Examples

A double-sided pressure-sensitive adhesive tape of an embodiment including processes and compositions according to the above-described exemplary embodiments was produced. Further, a double-sided pressure-sensitive adhesive tape of a comparative example in which the thickness and the composition of each layer were different from those of the examples was manufactured. The structure and composition of the double-sided pressure-sensitive adhesive tape according to Examples and Comparative Examples are as shown in Tables 1 and 2, respectively.

[Table 1] Example Double-sided pressure-sensitive adhesive tape

[Table 2] Comparative Example Double-sided adhesive tape

Experimental Example 1: Resistance test

Specimens (180 mm × 20 mm) of the double-sided adhesive tape of Examples and Comparative Examples were placed between the internal rebound jigs and a compressive force of 5 kgf / 5 sec was applied. According to the four experimental conditions, it was observed whether or not the interlaminar floating phenomenon occurred in the double-sided adhesive tape of Examples and Comparative Examples. The experimental conditions and results are shown in Table 3 below.

[Table 3]

Referring to Table 3, in the comparative example, lifting phenomena exceeding 20 mm and 10 mm were generated in Experimental Condition 2 and Experimental Condition 4, respectively, but in the embodiments, the lifting phenomenon did not occur substantially.

Accordingly, in the case of the double-faced pressure-sensitive adhesive tape according to the composition of the exemplary embodiments, the interlaminar adhesive strength is improved, and the interlaminar peeling phenomenon does not occur even in the external environment exposure and external impact, and the chemical resistance and stability are maintained even at high temperatures.

Experimental Example 2: Adhesion property test

Specimens (125 mm X 25 mm) of the double-sided adhesive tape of the above Examples and Comparative Examples were attached to the substrate once by reciprocating at a speed of 300 mm / min, left at room temperature for 30 minutes, The force required to peel off was measured, and the experimental results are shown in Table 4 below.

[Table 4]

Referring to Table 4, it can be seen that a larger force is required for peeling off the double-sided adhesive tape of the examples for all the substrates. Thus, it can be seen that the adhesive properties to the object are improved by the composition of the first and second adhesive layers 30 and 40 of the double-faced pressure sensitive adhesive tape according to the exemplary embodiments, and the chemical resistance is maintained even with the external exposure .

According to the above-described exemplary embodiments, the thickness and composition of the base layer, the intermediate layer, and / or the pressure-sensitive adhesive layer included in the double-faced pressure-sensitive adhesive tape can be optimized to optimize properties such as adhesiveness, chemical resistance, impact resistance, . The double-sided adhesive tape can be effectively applied as an adhesive member for various components included in a display device such as a mobile phone, an OLED device, or an LCD device, or a TSP.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the following claims. It can be understood that it is possible.

10: base layer 20: middle layer
25: pore particle 30: first pressure-sensitive adhesive layer
40: second pressure-sensitive adhesive layer 50: release layer

Claims (18)

A base layer;
An intermediate layer disposed on the base layer and formed from an acrylic binder containing a chemical additive comprising a diacrylate material; And
A first pressure-sensitive adhesive layer and a second pressure-sensitive adhesive layer which are respectively disposed on a bottom surface of the base layer and on an upper surface of the intermediate layer, the pressure-sensitive adhesive layer being formed from a monomer mixture comprising a plurality of acrylate compounds and acrylic acid,
Wherein the acrylic binder contained in the intermediate layer comprises butyl acrylate, vinyl acetate, acrylic acid, and the chemical additive. The double-sided pressure-sensitive adhesive tape according to claim 1, wherein the base layer has a thickness of 10 to 75 탆. delete The acrylic binder of claim 1, wherein the acrylic binder comprises 80 to 90 wt% of butyl acrylate, 2 to 10 wt% of vinyl acetate, 2 to 10 wt% of acrylic acid, and 0.5 wt% % To 1% by weight of said chemical additive. The double-sided pressure-sensitive adhesive tape according to claim 1, wherein the chemical additive comprises diacrylate of a dialcohol-based compound. 3. The composition of claim 1, wherein the intermediate layer comprises 70 to 90% by weight of the acrylic binder, 1 to 8% by weight of a curing agent, 3 to 8% by weight of an anchor agent, 3 to 8% By weight of pore particles, and from 2% by weight to 8% by weight of a dispersing agent. The double-sided pressure-sensitive adhesive tape according to claim 6, wherein the porous particles comprise a polymer coating layer, and the micropearl has an average particle size in the range of 20 탆 to 60 탆. The double-sided pressure-sensitive adhesive tape according to claim 7, wherein the intermediate layer has a thickness of 50 탆 to 150 탆. A base layer;
An intermediate layer disposed on the base layer and formed from an acrylic binder containing a chemical additive comprising a diacrylate material; And
A first pressure-sensitive adhesive layer and a second pressure-sensitive adhesive layer which are respectively disposed on a bottom surface of the base layer and on an upper surface of the intermediate layer, the pressure-sensitive adhesive layer being formed from a monomer mixture comprising a plurality of acrylate compounds and acrylic acid,
Wherein the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer comprise an acrylic copolymer, ethyl acetate and a solvent formed from the monomer mixture,
Wherein the monomer mixture comprises 2-ethylhexyl acrylate, butyl acrylate, vinyl acrylate, cyclohexylmethyl acrylate, and acrylic acid. delete 10. The composition of claim 9, wherein the monomer mixture comprises from 45% to 55% by weight of 2-ethylhexyl acrylate, from 5% by weight to 15% by weight of butyl acrylate, from 5% % By weight of cyclohexylmethyl acrylate, and 5% by weight to 15% by weight of acrylic acid. The double-faced pressure-sensitive adhesive tape according to claim 1, wherein each of the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer has a thickness of 20 탆 to 125 탆. The double-faced pressure-sensitive adhesive tape according to claim 1, further comprising a release layer attached on a bottom surface of the first pressure-sensitive adhesive layer. Fabricating a base layer;
Applying an acrylic binder, a curing agent, an anchor agent, a dispersant, and a pore-forming composition containing a chemical additive including a diacrylate material on the base layer to form an intermediate layer; And
Applying a pressure-sensitive adhesive comprising an acrylic copolymer, ethyl acetate and a solvent on the bottom surface of the base layer and the top surface of the intermediate layer to form a first pressure-sensitive adhesive layer and a second pressure-sensitive adhesive layer,
The composition used for forming the intermediate layer comprises 70 to 90% by weight of the acrylic binder, 1 to 8% by weight of the curing agent, 3 to 8% by weight of the anchor agent, 3 to 8% % Of said pore particles, and 2% to 8% by weight of said dispersing agent. delete 15. The method of claim 14, wherein the acrylic binder comprises from 80% to 90% by weight of butyl acrylate, from 2% to 10% by weight of vinyl acetate, from 2% to 10% By weight of said chemical additive. The pressure-sensitive adhesive of claim 14, wherein the pressure-sensitive adhesive comprises 30 to 35% by weight of the acrylic copolymer, 40 to 43% by weight of ethyl acetate, and 13 to 15% Toluene, and 10% by weight to 12% by weight of acetone. 18. The composition of claim 17, wherein the acrylic copolymer comprises from 45% to 55% by weight of 2-ethylhexyl acrylate, from 5% to 15% by weight of butyl acrylate, from 5% From 15% by weight to 25% by weight of cyclohexylmethyl acrylate and from 5% by weight to 15% by weight of acrylic acid.

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