KR20170020973A - PET cloth tape with good heat-resistant property and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a polyester (PET) cloth tape whose end portion is resistant to being undesirably released due to external factors (temperature, humidity, etc.) present in road driving conditions, wherein the PET tape comprises: a sheet which is woven using a PET thread and has a warp density of 80-140 threads/inch and a weft density of 60-120 threads/inch, wherein the thickness of the warp and weft is between 75-200 deniers; a coating layer which is disposed on one side of the sheet and is formed by a fire retardant diluted with a binder; and an adhesion layer which is formed on the other side of the sheet and is formed by an adhesive containing an additive for improving heat resistance. The PET tape of the present invention may satisfy the heat resistance required in the harsh conditions of, for example, the engine room of a vehicle and electrical and electronic wiring harnesses.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PET cloth tape having excellent heat resistance,

The present invention relates to a PET (Polyester: Plyethylene Terephthalate) cloth tape excellent in heat resistance and a method of manufacturing the PET tape. More particularly, the present invention relates to a PET cloth which is free from an end portion of a tape by an external environment (temperature, humidity, Tape and a manufacturing method thereof.

In addition, the present invention relates to a DR (Double Reverse) tape which has the same level of physical properties as PET Cloth tape and improves the flexibility of the wiring harness by designing that the adhesive does not adhere to the wire when taping.

In general, pressure sensitive adhesive (PSA) tapes are widely used in the automotive industry to produce wiring harness products. Various kinds of adhesives are applied to special backing and carrier such as film, foam and fiber, and are suitable for various purposes.

That is, various adhesive tapes such as insulation tapes used in electric devices in automobiles, railways, aircrafts, ships, houses, factories, etc. are mainly used for manual taping by the operator, so that they have reliable and consistent releasing characteristics, PET film has been used because it has excellent flame retardance, mechanical strength, heat resistance, electrical insulation and moldability, and is relatively inexpensive.

For example, a PET film is used in an acrylic foam tape in which 90% or more of the film is used as an intermediate substrate, which is a core of the film. The conventional acrylic foam tape adopts a method of coating a pressure-sensitive adhesive on a PET film in order to improve processability.

Examples of such techniques are described in documents 1 and 2 below.

For example, the following Patent Document 1 discloses a method for manufacturing a styrene block copolymer, which comprises the steps of: preparing an acrylic foam layer; and forming a rubber-based pressure-sensitive adhesive layer on one or both sides of the acrylic foam layer, A step of forming a rubber-based pressure-sensitive adhesive layer by adding a tackifier and a plasticizer to the styrene block copolymer, and a step of setting the gel content of the rubber-based pressure-sensitive adhesive layer to 40% or more .

Patent Document 2 discloses a pressure-sensitive adhesive tape comprising a yarn-woven support formed of PET (Polyester: Plyethylene Terephthalate), wherein a polymer coating is applied on the support in direct contact with a support, Wherein the support comprises a PET warp yarn and a weft yarn, wherein the Warp Thread Titre and Weft Thread Titre are less than or equal to 200 dtex, and wherein the support comprises from 35 to 65 warps per unit cm width and from 20 to 20 warp per unit cm width, Discloses an adhesive tape comprising 30 weft threads.

Korean Registered Patent No. 10-1393860 (Registered on May 1, 2014) Korean Patent Publication No. 2010-0093004 (published on Aug. 24, 2010)

However, there is a problem in that the adhesive tape according to the conventional technique as described above can not maintain heat resistance due to harsh conditions such as high temperature in the automobile engine room when the automobile is running.

SUMMARY OF THE INVENTION An object of the present invention is to provide a PET cloth tape capable of satisfying heat resistance required under harsh conditions such as an engine room of an automobile, an electric and electronic wiring harness, and a method of manufacturing the same. will be.

Another object of the present invention is to provide a PET cloth tape and a method of manufacturing the PET cloth tape capable of maintaining adhesive strength at a high temperature, abrasion resistance, and high heat resistance.

In order to attain the above object, the PET cloth tape according to the present invention is made up of PET (Polyester) yarns having a density of 80-140 / inch inclined and 60-120 / inch weft, And a pressure-sensitive adhesive layer formed on the other side of the fabric with a heat-resistance-enhancing auxiliary agent, wherein the pressure-sensitive adhesive layer comprises a pressure-sensitive adhesive layer having a thickness of 75 to 200 denier, a coating layer formed of a flame retardant diluted with a binder on one side of the fabric, .

In the PET cloth tape according to the present invention, the adhesive layer is also formed on the coating layer.

In the PET Cloth tape according to the present invention, the adhesive layer contains 5 to 30 PHR of a heat resistance improving auxiliary to 100PHR of the pressure-sensitive adhesive.

In the PET Cloth tape according to the present invention, the adhesive layer contains 10 to 30 PHR of a flame retardant relative to 100 PHR of the pressure-sensitive adhesive.

In the PET cloth tape according to the present invention, the adhesive layer contains 5 to 20 PHR of the anti-smell additive to 100PHR of the pressure-sensitive adhesive.

In the PET cloth tape according to the present invention, the heat resistance improving adjuvant is an acrylic emulsion using any one of acrylic emulsions using rosin ester, terpene phenol resin and crosslinked monomer, or a mixture thereof, The anti-wrinkle additive may be any one of a plasticizer, a polybutene, and a polyethylene glycol, or a mixture thereof.

Further, in the PET cloth tape according to the present invention, a part of the pair of PET cloth tape pressure-sensitive adhesive layers is overlapped with each other so that the pressure-sensitive adhesive layer is exposed on one side of the upper end and the other side of the lower side.

In order to attain the above object, the present invention provides a method of manufacturing a PET cloth tape, comprising the steps of: (a) preparing a fabric with PET; (b) forming a binder on one side of the fabric prepared in step (a) (C) coating a pressure sensitive adhesive comprising a heat resistance enhancing additive and an antiseptic adder on the other side of the fabric prepared in the step (b); (d) Drying the pressure-sensitive adhesive, and (e) winding, cutting and packaging the tape dried in the step (d).

In the method of manufacturing a PET cloth tape according to the present invention, in the step (a), the fabric may have a density of 80-140 / inch and a width of 60-120 / inch, The thickness of the yarn is 75 to 200 denier.

In the method of manufacturing a PET cloth tape according to the present invention, in the step (a), the fabric has a yarn density of 100 dynes / inch and 80 yarns / inch, a yarn thickness of 150 dynes, And the yarn thickness is 150 denier.

Further, in the method of manufacturing a PET cloth tape according to the present invention, the adhesive layer is also formed on the coating layer in the step (c), and includes 10 to 30 PHR of a flame retardant and 5 to 30 PHR of a heat resistance improving auxiliary to 100 PHR of the pressure- .

Further, in the method for producing a PET cloth tape according to the present invention, the pressure-sensitive adhesive layer comprises 5 to 10 PHR of a blur prevention additive to 100PHR of a pressure-sensitive adhesive.

In the method for producing a PET cloth tape according to the present invention, the pressure-sensitive adhesive layer comprises 11 to 20 PHR of a blur prevention additive to 100PHR of a pressure-sensitive adhesive.

Further, in the method for producing a PET cloth tape according to the present invention, the heat resistance improving auxiliary may be at least one selected from the group consisting of rosin ester, terpene phenol resin, acrylic emulsion added with crosslinking monomer, And the anti-wrinkle additive is any one of a plasticizer, a polybutene, and a polyethylene glycol, or a mixture thereof.

Further, in the method for producing a PET cloth tape according to the present invention, a part of a pair of PET cloth tape pressure-sensitive adhesive layers are superimposed on each other so that the pressure-sensitive adhesive layer is exposed on one side of the upper end and the other side of the lower side.

As described above, according to the PET cloth tape excellent in heat resistance and the method of manufacturing the same according to the present invention, it is possible to improve the heat resistance in a high temperature environment by using the heat resistance improving additive for raising the adhesive force after heating,占 폚 占 168 hours) is improved to about 130% or more as compared with the steady state average adhesive force.

Further, according to the PET cloth tape having excellent heat resistance according to the present invention and the manufacturing method thereof, it is possible to prevent the end of the tape from being loosened due to the external environment (high temperature, humidity, etc.) in the automobile field (running).

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a process diagram for explaining a manufacturing process of a PET cloth tape according to the present invention. FIG.

These and other objects and novel features of the present invention will become more apparent from the description of the present specification and the accompanying drawings.

The PET cloth tape according to the present invention is added with an optimum amount of a heat resistance improving additive in order to increase the adhesive force at a high temperature, that is, the adhesive force after heating. The heat resistance improving adjuvant may be selected from the group consisting of rosin ester, terpene phenol resin, acryl emulsion using a crosslinking monomer, or acrylic emulsion using a mixture thereof. 130 占 폚 占 168 hours) was improved to about 130% or more as compared with the average state adhesive strength in the steady state,

It is possible to prevent the end portion of the tape from being unwound by the external environment (high temperature, humidity, etc.).

The present invention also provides a PET DR (Double Reverse) tape for improving the flexibility of a PET cloth tape by partially overlapping a pair of PET cloth tape pressure-sensitive adhesive layers and exposing a pressure-sensitive adhesive layer to one side of the upper side and the other side of the lower side, to provide.

The structure of the PET formed by the polyester applied to the PET cloth tape according to the present invention is as follows.

In the present invention, as a quality standard, a tensile strength of 20 Kgf / 19 mm or more, an elongation of 40% or less, a withstanding voltage of 1 kV or more for 1 minute, a wear resistance of 10,000 times or more, Satisfies that there is no phenomenon.

Therefore, the density of the yarn in the fabric made of PET to be applied to the present invention is set to 80-140 yarns / inch, which is a vertical yarn, and 60-120 yarns / inch, which is a weft yarn, and the yarn thickness is 75-200 denier (Denier). Preferably, the fabric has a yarn density of 100 yarns / inch and 80 yarns / inch and a yarn thickness of 150 denier in warp and weft yarns. By providing the density and thickness of the yarn under such conditions, the tensile strength is 20 to 30 kgf / 19 mm, the elongation is 40% or less, the withstand voltage is 1 kV / min, and the abrasion resistance is satisfied 10,000 times or more. Also, when applying the pressure-sensitive adhesive, there was no phenomenon that the pressure-sensitive adhesive leaked to the back side of the substrate.

On the other hand, if the yarn density is less than 79 denier / inch and the weft yarn is less than 59 denier / inch, and the warp and weft yarn thickness is less than 75 denier, the tensile strength is reduced to 19 kgf / 19 mm or less and the elongation is 40% And the withstand voltage does not satisfy 1kV / min or more, the abrasion resistance is lowered, and the pressure-sensitive adhesive is leaked to the back side of the substrate when the pressure-sensitive adhesive is applied.

In the case of yarn density more than 141 dpi / inch and weft yarn more than 121 dpi / inch, when the yarn thickness is more than 200 denier in warp and weft, the withstand voltage satisfies more than 1kV / min and wear resistance is increased and tensile strength is 30kgf / 19 mm or more and an elongation of 40% or less. However, there is a problem that the fabric becomes stiff and the flexibility of the tape deteriorates.

Next, flame retardancy and pressure-sensitive adhesive leaking prevention treatment will be described as a compositional characteristic.

In the present invention, a flame retardant diluted with a binder is first coated directly on a fabric formed of PET to prevent leakage of the adhesive, and a flame retardant is coated with a diluted pressure-sensitive adhesive to give a flame retardant effect.

Preferably, the flame retardant is PBBs (polybrominated biphenyls), PBBs (polybromodiphenyl ethers), phosphorus flame retardants or halogen flame retardants, which are harmful to the human body.

That is, the first flame retardant agent is mixed with the flame retardant agent mixed with the flame retardant agent to prevent the adhesive agent from leaking by infiltrating the gap between the warp and weft of the fabric to penetrate through the fabric during the first application, .

In the present invention, in order to satisfy the self-extinguishment that the adhesive force of quality is at least 130 gf / 19 mm, the average is 180 gf / 19 mm or more, and the self-extinguishing is within 60 seconds without burning (80 mm / minute or less from the measurement point) The content of the flame retardant is preferably 10 to 30 PHR per 100 PHR (Part Per Hundred Resin). By applying such a content, the adhesive force satisfies 180 gf / 19 mm or more, and the self-extinguishing property (self-extinguishing property) is achieved.

However, when the content of the flame retardant agent is 9 PHR or less with respect to 100 PHR of the pressure-sensitive adhesive, the adhesive strength satisfies 180 gf / 19 mm or more and the adhesive strength increases, but the flammability (single product state) exceeds 80 mm / minute.

When the content of the flame retardant agent is 31 PHR or more with respect to 100 PHR of the pressure-sensitive adhesive, the flammability (single product state) satisfies the self-extinguishment, but the adhesive strength is less than 130 gf / 19 mm.

In the present invention, an additive for improving heat resistance is added so that the end of the tape is not loosened by an external environment (temperature, humidity, etc.) in an automobile field (driving), thereby improving the adhesive force after heating.

That is, in order to increase the adhesive force after heating, an acrylic emulsion in which any one of rosin ester, terpene phenol resin, acrylic emulsion using a crosslinking monomer, or a mixture thereof is used as a heat resistance improver in the pressure- Add an appropriate amount to improve the adhesive strength of the tape at high temperature (after heating).

In the PET cloth tape according to the present invention, in order to satisfy the quality standard stuck state adhesion of at least 130 gf / 19 mm and an average of 180 gf / 19 mm or more, the adhesive strength after heating should be at least 130% The content of the enhancement aid was 5 to 30 PHR, preferably 15 PHR, based on 100 PHR of the pressure-sensitive adhesive.

As a test method of the adhesive strength, the adhesive strength of the normal state is determined by adhering the tape to the test plate in the longitudinal direction, pressing it with the pressing roller, and measuring the adhesive strength using the adhesive force tester. × 168 hours, then left at room temperature for 30 minutes, and then measured in the same manner as in the normal state. Heat resistance was measured by half-lapping tape on a 800 mm long wire and heating at 150 ° C. for 3,000 hours or 175 ° C. for 240 hours End loops, and cracks were investigated.

By setting the content of the heat resistance improving auxiliary agent to 5 to 15 PHR with respect to 100 PHR of the pressure sensitive adhesive, the adhesive force after heating satisfies 130% or more of the steady state average value, the steady state adhesive force satisfies an average of 180 gf / 19 mm or more, , Cracks, and the like, and satisfied the heat resistance test standard.

On the other hand, when the content of the heat-resistance-enhancing auxiliary agent is less than 4 PHR with respect to 100 PHR of the pressure-sensitive adhesive, the adhesive strength is lowered and the normal state adhesive force does not satisfy the average of 180 gf / 19 mm or more and the adhesive force after heating does not satisfy 130% There is a problem that the heat resistance test standard such as the occurrence of inflation is not satisfied.

When the content of the heat-resistance-enhancing auxiliary agent is not less than 31PHR with respect to 100PHR of the pressure-sensitive adhesive, the adhesion after heating satisfies 130% or more of the steady-state average value, but the adhesive strength is lowered, There is a problem that the adhesive strength test standard such as peeling occurs.

In addition, the present invention improves the problem by injecting the anti-wrinkle additive into the pressure-sensitive adhesive so that the pressure-sensitive adhesive surface (pressure-sensitive adhesive) on the DR tape structure is directly or indirectly exposed to the air so as not to lower the adhesive force and the tack.

Polybutene, Polyethylene Glycol, and Polyethylene Glycol are added to the adhesive so that the adhesive strength and tackiness of the adhesive surface exposed directly or indirectly to the air are not lowered when the PET Cloth tape is left at room temperature for a certain period of time. Or a mixture thereof) is added in an appropriate amount to prevent the adhesive of the tape from drying.

In the PET cloth tape according to the present invention, the pressure-sensitive adhesive tackiness evaluation of the quality standard was carried out at room temperature for 30 days. 8 or more and a steady state adhesive strength of 130 gf / 19 mm or more, the content of the anti-smudge additive is adjusted to 5 to 20 PHR with respect to 100 PHR of the pressure-sensitive adhesive when the pressure-sensitive adhesive is applied.

The VOLTECH test is used as a measure for measuring the initial adhesion. (Balls No. 1 to 12), the initial adhesive strength is excellent. This Voltek test method is based on KS T 1028 (Test Method for Adhesive Tape and Adhesive Sheet).

The content of the anti-smudge additive was adjusted to 5 to 20 PHR with respect to 100 PHR of the pressure-sensitive adhesive, and the pressure-sensitive adhesive side was left at room temperature for 30 days. 8 and above, and the average state adhesive strength was above 130gf / 19mm.

On the other hand, if the content of the anti-wrinkle additive is less than 4 PHR with respect to 100 PHR of the pressure sensitive adhesive, the adhesive strength is lowered and the pressure sensitive adhesive surface is left at room temperature for 30 days. 8 or more, and the normal state adhesion did not satisfy the average of 130gf / 19mm or more.

If the content of the anti-smudge additive is 21 PHR or more with respect to 100 PHR of the pressure sensitive adhesive, the adhesive strength is lowered, and the pressure sensitive adhesive surface is left at room temperature for 30 days. 8 or more, and the normal state adhesive force does not satisfy the average 130 gf / 19 mm or more.

On the other hand, in the case where the pressure-sensitive adhesive is provided on only one side of the fabric in the PET cloth tape according to the present invention, the content of the anti-smudge additive is preferably 5 to 11 PHR per 100 PHR in order to prevent the adhesive surface from being indirectly exposed to air, When the pressure-sensitive adhesive is provided on both sides of the fabric, the blur prevention property of the pressure-sensitive adhesive is improved by setting the content of the anti-smudge additive to 11 to 20 PHR per 100 PHR of the pressure-sensitive adhesive.

Next, the production of the PET cloth tape according to the present invention as described above will be described with reference to Fig.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a process diagram for explaining a manufacturing process of a PET cloth tape according to the present invention. FIG.

In the method of manufacturing a PET cloth tape according to the present invention, a fabric is prepared from a PET yarn or a filament yarn (S10).

The fabric includes a false-twisting process for pulling the raw materials of the stocks and heating them by pulling the raw materials, heat-treating the loose yarns for coating the loose yarns to smooth the weaving of the twisted yarns, and weaving and weaving The weaving process and dyeing of the fabric are performed, and heat is applied to the fabric to uniformly stretch the fabric.

The weaving process is performed by providing a yarn made of a PET yarn or a filament yarn at a density of 80 to 140 yarns / inch and a weft yarn size of 60 to 120 yarns / inch, It is preferable that it is provided as a Denier.

As described above, by providing the density and the thickness of the yarn, the tensile strength is 20 to 30 kgf / 19 mm, the elongation is 40% or less, the withstand voltage is 1 kV / min and the abrasion resistance is satisfied 10,000 times or more , And when the adhesive was applied, the adhesive did not leak to the back side of the substrate.

Separately from the preparation of the fabric, a coating layer for coating the fabric and a flame retardant and an adhesive for forming the adhesive layer are prepared.

The flame retardant for the coating layer is a phosphorus flame retardant or a halogen flame retardant. The binder having excellent permeability is diluted and coated on one side of the fabric prepared in step S10 (S20).

The coating at step S20 prevents the occurrence of fluff when the pores between the warp and weft of the fabric are buried and torn to prevent the pressure-sensitive adhesive from leaking out, and additionally imparts flame retardancy to the flame retardant auxiliary role.

Next, the pressure sensitive adhesive containing the heat resistance improving auxiliary and the anti-blinding additive is coated on the other side of the fabric prepared in the step S20 (S30).

The pressure-sensitive adhesive contains 10 to 30 PHR of a flame retardant, 5 to 30 PHR of a heat resistance improver, and 5 to 20 PHR of a flameproofing additive, based on 100 PHR of the pressure-sensitive adhesive. By incorporating the flame retardant into the pressure-sensitive adhesive, the flame retardancy can be maintained after the completion of the production of the product, so that the single-item state burnability can be satisfied.

In addition, by including 5 to 30 PHR of the heat resistance improving auxiliary to the above-mentioned pressure-sensitive adhesive 100PHR, the adhesive strength in the steady state is at least 130 gf / 19 mm, the average is 180 gf / 19 mm or more, and the adhesive force after heating satisfies 130% Respectively.

Further, by adding 5 to 20 PHR of the anti-smudge additive to 100PHR of the pressure-sensitive adhesive, the pressure-sensitive adhesive surface was left at room temperature for 30 days. 8 and more than 130gf / 19mm in normal state.

The coating method in steps S20 and S30 may be a direct coating or a transfer coating in consideration of the tape specification, the adhesive type, the viscosity, and the solid content.

Subsequently, the coated pressure-sensitive adhesive is dried in step S30 (S40). The drying conditions in step S40 may vary depending on the length of the tape, the thickness of the pressure-sensitive adhesive, and the like, and thus are not limited to the specific temperature and time.

The tape dried in the step S40 is wound up to a predetermined length and cut to a prescribed width to complete the PET cloth tape according to the present invention. Two tapes of a prescribed length are packed with adhesive tape between the adhesive surfaces (S50) Thereby completing the DR (Double Reverse) tape.

Although the present invention has been described in detail with reference to the above embodiments, it is needless to say that the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

By using the PET cloth tape excellent in heat resistance according to the present invention and the manufacturing method thereof, it is possible to satisfy heat resistance required in harsh conditions such as an engine room of an automobile, an electric and electronic wiring harness, and the like.

Claims (15)

A fabric having a density of 80 to 140 yarns / inch and a yarn width of 60 to 120 yarns / inch and a yarn thickness of 75 to 200 deniers in warp and weft, the density of yarns formed of PET (polyester) ,
A coating layer formed of a flame retardant diluted with a binder on one side of the fabric and
And an adhesive layer formed on the other side of the fabric with a pressure sensitive adhesive containing a heat resistance improving auxiliary. The method of claim 1,
Wherein the adhesive layer is also formed on the coating layer. 3. The method according to claim 1 or 2,
Wherein the pressure-sensitive adhesive layer contains 5 to 30 PHR of a heat resistance improving auxiliary to 100PHR. 4. The method of claim 3,
Wherein the pressure-sensitive adhesive layer contains 10 to 30 PHR of a flame retardant with respect to 100 PHR of the pressure-sensitive adhesive. 4. The method of claim 3,
Wherein the pressure-sensitive adhesive layer contains 5 to 20 PHR of the anti-wrinkle additive to 100PHR of the pressure-sensitive adhesive. The method of claim 5,
The heat resistance improving adjuvant is an acrylic emulsion in which any one of rosin ester, terpene phenol, acrylic emulsion using a crosslinking monomer, or a mixture thereof is used,
Wherein the anti-wrinkle additive is any one of a plasticizer, a polybutene, and a polyethylene glycol, or a mixture thereof. 3. The method of claim 2,
Wherein a part of the pressure-sensitive adhesive layer of a pair of PET cloth tape layers is overlapped with each other so that the pressure-sensitive adhesive layer is exposed on one side of the upper side and the other side of the lower side, respectively. (a) preparing a fabric with PET (Polyester)
(b) coating a flame retardant diluted with a binder on one side of the fabric prepared in the step (a)
(c) coating an adhesive on the other side of the fabric prepared in the step (b) with a heat resistance improving auxiliary and an anti-
(d) drying the coated pressure-sensitive adhesive in the step (c)
(e) winding, cutting, and packaging the tape dried in the step (d). 9. The method of claim 8,
In the step (a), the fabric has a density of 80 to 140 yarns / inch and a yarn density of 60 to 120 yarns / inch and a yarn density of 75 to 200 denier ≪ / RTI > The method of claim 9,
Wherein the fabric has a yarn density of 100 dynes / inch and 80 yarns / inch, and a yarn thickness of 150 dynes in warp and weft yarns in step (a). The method of claim 9,
Wherein the adhesive layer is also formed on the coating layer in step (c), and comprises 10 to 30 PHR of a flame retardant and 5 to 30 PHR of a heat resistance improving additive with respect to 100 PHR of the pressure sensitive adhesive. The method of claim 9,
Wherein the adhesive layer comprises 5 to 10 PHR of the anti-smudge additive to 100 PHR of the pressure-sensitive adhesive. 12. The method of claim 11,
Wherein the adhesive layer comprises 11 to 20 PHR of a blur prevention additive to 100 PHR of the pressure sensitive adhesive. 12. The method according to claim 11 or 12,
The heat resistance improving adjuvant is an acrylic emulsion in which any one of rosin ester, terpene phenol, acrylic emulsion using a crosslinking monomer, or a mixture thereof is used,
Wherein the anti-wrinkle additive is any one of a plasticizer, a polybutene, and a polyethylene glycol, or a mixture thereof. The method of claim 14,
Wherein a part of the pair of PET cloth tape pressure-sensitive adhesive layers is formed so as to be overlapped with each other so that the pressure-sensitive adhesive layer is exposed on one side of the upper end and the other side of the lower end.

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