KR100650133B1 - A transparent anti-static release film, preparing method thereof and the adhesive tape therefrom - Google Patents

Abstract

The present invention relates to a transparent antistatic release film, a method for manufacturing the same, and an adhesive tape formed therefrom. More specifically, an antistatic layer coated with a transparent conductive polymer on one side of a silicone release layer on which a silicone resin is deposited on one side of a base film A transparent antistatic release film formed by the present invention, a method of manufacturing the same, and an adhesive tape formed therefrom are provided.

According to the present invention, a release film having excellent transparency and antistatic properties can be prepared, and the release film thus prepared can be usefully used for internal and external materials or packaging materials such as semiconductors or electronic products which are extremely sensitive to static electricity.

Release Film, Antistatic, Semiconductor, Electronic Products, Adhesive Tape

Description

 A transparent anti-static release film, a method of manufacturing the same and a pressure-sensitive adhesive tape formed therefrom {A transparent anti-static release film, preparing method about and the adhesive tape therefrom}

1 is a cross-sectional view of a release film to which a transparent antistatic coating layer according to the present invention is applied.

Figure 2 is a cross-sectional view of the adhesive tape laminated the release film to which the transparent antistatic coating layer according to the present invention is applied.

Figure 3 is a block diagram of a pressure-sensitive adhesive coating machine for forming an adhesive tape by laminating the release film and the adhesive base paper.

* Explanation of symbols for main parts of the drawings

  One … Base film 2. Silicon release layer

  3…. Antistatic layer 4. Adhesive layer

  5... Adhesive base 6. Adhesive coating roller

  7. Dry doc 8. Release Film

  9... Pressure roller 10. Adhesive Tape

The present invention relates to a transparent antistatic release film, a method for manufacturing the same, and an adhesive tape formed therefrom, and more particularly, having excellent transparency and antistatic property useful for internal and external materials or packaging materials of a semiconductor or electronic product sensitive to static electricity. The present invention relates to a transparent antistatic release film, a method of manufacturing the same, and an adhesive tape formed by laminating the antistatic release film and an adhesive base material.

Release paper or release film is a paper or film that is attached to the backing to protect the adhesive side of the adhesive tape.It protects the surface by contacting the adhesive side such as adhesive tape, pressure-sensitive adhesive paper, labels, and seals. The surface is processed to peel off and achieve the purpose.

Generally, a base paper used as a release paper includes glassine, kraft paper, a film, and the like, and silicon is generally used as a release treatment agent. In the case of a release film, polypropylene or polyethylene terephthalate is used as a base film.

In the case of a release film, it is preferred to an expensive product because it is considerably excellent in smoothness and excellent in durability, solvent resistance, tensile strength, and high work efficiency compared to release paper.

Existing release film is a polypropylene or polyethylene terephthalate film in which silicon is deposited as an insulator, and there are many restrictions due to static electricity generated during processing or application process, and in particular, it is impossible to apply itself in some semiconductor or electronic industries.

     In addition, as an antistatic release film, an antistatic release film (Korean Patent Application No. 10-1997-042306) prepared by adding an antistatic agent such as alkyltrimethylammonium chloride to a silicone resin or an antistatic agent layer such as glycerin monostearate is based on A protective film produced by coating a film and forming a release layer on an antistatic layer has been reported.

However, the existing antistatic additives are in the form of surfactants. In the case of the antistatic agents of the surfactants, the antistatic agents react sensitively with moisture under the influence of the surfactants to not obtain a semi-permanent electrostatic dispersion effect, and are ion-transferred to the surface to precipitate on the base plastic film. Therefore, it is impossible to apply to internal and external materials or packaging materials such as semiconductor or electronic products which are extremely sensitive to static electricity.

Coating compositions using conductive polymers as antistatic agents have been developed and sold in Bayer, Germany, in an aqueous solution of a conductive polythiophene called “Baytron.” For these compositions, see US Patent 5,372,924 (1994, Agfa Co. .): Antistatic plastic molding, US Pat. No. 5,792,558 (1998, Bayer Co.): Process for the electrostatic lacquering of non-conductive surface, etc. The composition and use of the composition are known, and also suitable for various applications. Bayer Technical information ”(published in 1996) and on the Internet. These conductive polymer coating compositions are conventionally antistatic coating compositions, and in the case of antistatic films coated with a base plastic surface, the surface resistance meets the user's requirements However, it has a disadvantage of poor solvent resistance and wear resistance to a solvent such as alcohol, and to provide in the present invention Antistatic release film structure is not less applied.

Accordingly, an object of the present invention is not only to have excellent transparency, but also to fundamentally suppress the generation of static electricity, which is a chronic problem of a release film, and to have excellent transparency and antistatic properties useful for internal and external materials or packaging materials of semiconductors or electronic products sensitive to static electricity. It is to provide a preventive release film.

Another object of the present invention is to provide a method for producing the transparent antistatic release film.

Still another object of the present invention is to provide an adhesive tape formed by laminating the antistatic release film and the adhesive base paper.

In a first aspect of the invention,
A silicon release layer in which a silicon resin is deposited on one surface of the base film; And
One or two or more transparent π-conjugated systems selected from the group consisting of polyaniline, polypyrrole, polythiophene, poly (3,4-ethylenethiophene), derivatives and copolymers thereof on the other side of the base film Antistatic layer coated with a conductive polymer;
It is provided with a transparent antistatic release film formed.

In a second aspect of the invention,
Depositing a silicone resin on one surface of the base film to form a silicon release layer; And
One or two or more transparent π-conjugated systems selected from the group consisting of polyaniline, polypyrrole, polythiophene, poly (3,4-ethylenethiophene), derivatives and copolymers thereof on the other side of the base film Coating an antistatic layer coated with a conductive polymer;
Provided is a method for producing a transparent antistatic release film comprising a.

In a third aspect of the invention, there is provided an adhesive tape formed by laminating a surface on which a silicone release layer of an antistatic release film is formed and a surface on which an adhesive of an adhesive base is coated.

Hereinafter, the present invention will be described in more detail.

The present inventors conducted various studies on the release film satisfying the performance that can be used as a material or a packaging material applicable to the semiconductor and the electronics industry as well as supplementing the vulnerability to the static electricity of the conventional release film, By coating a conductive polymer coating solution with an antistatic agent on one side, the present inventors have found that a release film having excellent antistatic properties, which can be applied not only to excellent transparency but also to the semiconductor and electronic industries, can be manufactured.

As shown in FIG. 1, the release film to which the transparent antistatic coating layer according to the present invention is applied is coated by diluting silicone with a curing agent and thermally, for example, on a base film such as polypropylene to produce a general silicone release film. After curing, the silicon resin was deposited, and then the transparent conductive polymer coating solution was coated on the other side of the silicone resin-coated polypropylene film, followed by heat drying, so that one side was releasable, and the other side was transparent having excellent transparency and antistatic properties. Manufacture an antistatic release film.

The base film may be melted, extruded, molded, uniaxially or biaxially stretched according to a conventional method, and the base film used in the present invention may be a polyolefin such as polypropylene, polyethylene, polyester such as polyethylene terephthalate, It is preferred that at least one is selected from the group consisting of polyamides, polycarbonates, polyacetals, mixtures thereof and copolymers. Preferably, a polyester film and a polypropylene film are suitable.

The antistatic layer is a transparent conductive polymer coating composition comprising 1-30% by weight of a conductive polymer, 2-20% by weight of an acrylic-urethane copolymer binder, 40-80% by weight of water and / or an organic solvent, and 0.1-5% by weight of an additive. It is preferably formed by coating. In this case, if the conductive polymer is included in less than 1% by weight, it may not exhibit sufficient antistatic properties, and if it exceeds 30% by weight, transparency may be reduced. When the acrylic-urethane copolymer binder is included in less than 2% by weight, the adhesiveness may be weakened and the adhesiveness may become too strong when it exceeds 20% by weight. And when the water and / or the organic solvent is less than 40% by weight, coating workability may be lowered, and when the water and / or organic solvent exceeds 80% by weight may be antistatic properties.

The conductive polymer may be a π-conjugated electrically conductive polymer. Preferably, the π-conjugated electrically conductive polymer is selected from the group consisting of polyaniline, polypyrrole, polythiophene, poly (3,4-ethylenethiophene), derivatives and copolymers thereof.

Organic solvents used in the present invention include, but are not limited to, dimethyl sulfoxide (DMSO), dimethylformamide (DMF), N-methyl-2-pyrrolidinone (NMP), 2-butanone, 4-methyl- It is preferred that at least one is selected from the group consisting of 2-pentanone, methyl alcohol, ethyl alcohol, isopropyl alcohol, isobutyl alcohol, t-butyl alcohol, benzyl alcohol and ethylene glycol. In addition, a slip agent or a wetting agent may be used as the additive. These additives are preferably included in an amount of 0.1-5% by weight, and if too little of these additives are included, sufficient slip or wettability may not appear and no excess is necessary.

The transparent conductive polymer coating composition may be coated by conventional methods such as gravure, roll or spray coating. It is also preferable to heat-treat after the coating. For example, the transparent conductive polymer coating composition is coated on the cross section of the base film by a general coating method such as gravure, roll, spray, and the like and heat cured at 80 to 120 ° C. for 2 minutes.

The transparent antistatic release film according to the present invention may be manufactured by adhesive tape by laminating the surface on which the silicone release layer of the antistatic release film is formed and the surface of the adhesive base coated with adhesive. 2 is a cross-sectional view of the adhesive tape on which the release film to which the transparent antistatic coating layer is applied according to the present invention is laminated. Preparation of the adhesive tape using the release film and the adhesive base paper may be performed using an adhesive coating machine as shown in FIG.

Hereinafter, the present invention will be described in detail through examples.

Example 1

Manufacturing of Release Film

25 weight% of silicone resin (Dow Corning LS-203) and 75 weight% of toluene were mixed, 0.25 weight% of platinum catalyst (Dow Corning SO-4000) was added, and it stirred for 5 minutes, and obtained the silicone resin composition. After coating the silicone resin composition on a polypropylene film having a thickness of 30 μm by using a coating roller, a drying duct at 115 ° C. was advanced at a speed of 40 m per minute to dry to obtain a thickness of the silicon release layer of 1.0 μm.

The transparent conductive polymer coating liquid composition is 15% by weight of poly (3,4-ethylenedioxythiophene) (Baytron PH, manufactured by HC Starck, Germany), an acrylic-urethane copolymer binder (Stahl Asia Pte Ltd., WF- 4644) 10% by weight, organic solvent (2% by weight of NMP, 3% by weight of DMSO), 24.5% by weight of water, 45% by weight of isopropyl alcohol, 0.5% by weight of slip additive (Tego, Glide 410) were added. Prepared by stirring.

Then, the transparent conductive polymer coating composition thus prepared was coated on the lower surface of the film on which the silicone resin was deposited using a coating roller, and then dried at 115 ° C. at a speed of 40 m per minute to have a thickness of 0.5. A release film having a coating layer of μm was obtained.

The surface resistance of the film coated with the transparent antistatic coating solution was 10E6 Ω / cm ² by ASTM D257 method, the transparency was measured in the visible light (550 nm) region using a UV photometer (Simazu Co.) The result was 96%.

Example 2

Manufacturing of Release Film

In the same manner as in Example 1 to prepare a film deposited with a silicone resin.

The transparent conductive polymer coating liquid composition is 15% by weight of polypyrrole (NanochemTech Co., Ltd, PACON-BW), a water-soluble polymer dispersion, 10% by weight of an acrylic-urethane copolymer binder (Stahl Asia Pte Ltd., WF-4644), an organic solvent (NMP 2% by weight, 3% by weight DMSO), 24.5% by weight water, 45% by weight isopropyl alcohol, 0.5% by weight of slip additives (Tego, Glode 410) was added and stirred for 5 minutes.

Then, the transparent conductive polymer coating composition thus prepared was coated on the lower surface of the film on which the silicone resin was deposited using a coating roller, and then dried at a speed of 40 m / min at 115 ° C. for drying duct at a speed of 5 m. A release film having a coating layer of μm was obtained.

The surface resistance of the film coated with the transparent antistatic coating solution was 10E6Ω / cm ² by ASTM D257 method, and the transparency was measured in the visible light (550 nm) region by using a UV photometer (Simazu Co.). 92%.

Example 3

After applying the adhesive adhesive (PET film, 25㎛) to the coating part using an adhesive coating machine (Hongil Machinery Co., Ltd.), and passing through a drying duct of 140 ℃ at a speed of 35m per minute and dried, Pressure-bonding the release film prepared according to Example 1 in the roller to prepare an adhesive tape for an automatic labeling machine.

Example 4

After applying the adhesive adhesive (PET film, 25㎛) to the coating part using an adhesive coating machine (Hongil Machinery Co., Ltd.), and passing through a drying duct of 140 ℃ at a speed of 35m per minute and dried, Pressure rollers with a release film prepared according to Example 2 in a roller to prepare an adhesive tape for an automatic labeling machine.

According to the present invention, a release film having excellent transparency and antistatic properties can be prepared, and the release film thus prepared can be usefully used for internal and external materials or packaging materials such as semiconductors or electronic products which are extremely sensitive to static electricity.

Claims (16)

A silicon release layer in which a silicon resin is deposited on one surface of the base film; And One or two or more transparent π-conjugated systems selected from the group consisting of polyaniline, polypyrrole, polythiophene, poly (3,4-ethylenethiophene), derivatives and copolymers thereof on the other side of the base film Antistatic layer coated with a conductive polymer; Transparent antistatic release film formed by. The method of claim 1, wherein the antistatic layer comprises 1-30% by weight of a conductive polymer, 2-20% by weight of an acrylic-urethane copolymer binder, 40-80% by weight of water, an organic solvent or a mixture thereof, and 0.1-5% by weight of an additive. Antistatic release film, characterized in that formed by coating with a transparent conductive polymer coating composition made. The method of claim 2, wherein the organic solvent is dimethyl sulfoxide (DMSO), dimethylformamide (DMF), N-methyl-2-pyrrolidinone (NMP), 2-butanone, 4-methyl-2-pentanone Antistatic release film, characterized in that one or two or more organic solvent selected from the group consisting of methyl alcohol, ethyl alcohol, isopropyl alcohol, isobutyl alcohol, t-butyl alcohol, benzyl alcohol and ethylene glycol. The antistatic release film of claim 2, wherein the additive is a slip agent or a wetting agent. delete delete The antistatic release film according to claim 1, wherein the base film is one or two or more selected from the group consisting of polyolefins, polyesters, polyamides, polycarbonates, polyacetals, mixtures and copolymers thereof. . Depositing a silicone resin on one surface of the base film to form a silicon release layer; And One or two or more transparent π-conjugated systems selected from the group consisting of polyaniline, polypyrrole, polythiophene, poly (3,4-ethylenethiophene), derivatives and copolymers thereof on the other side of the base film Coating an antistatic layer coated with a conductive polymer; Method for producing a transparent antistatic release film comprising a. The method of claim 8, wherein the antistatic layer comprises 1-30% by weight of a conductive polymer, 2-20% by weight of an acrylic-urethane copolymer binder, 40-80% by weight of water, an organic solvent or a mixture thereof, and 0.1-5% by weight of an additive. Antistatic release film manufacturing method characterized in that formed by coating with a transparent conductive polymer coating composition made. The method of claim 9, wherein the coating of the transparent conductive polymer coating composition is performed by a gravure, roll, or spray coating method. The method of claim 9, wherein the organic solvent is dimethyl sulfoxide (DMSO), dimethylformamide (DMF), N-methyl-2-pyrrolidinone (NMP), 2-butanone, 4-methyl-2-pentanone And methyl alcohol, ethyl alcohol, isopropyl alcohol, isobutyl alcohol, t-butyl alcohol, benzyl alcohol, and at least one organic solvent selected from the group consisting of ethylene glycol. 10. The method of claim 9, wherein the additive is a slip agent or a wetting agent. delete delete The antistatic release film of claim 8, wherein the base film is one or two or more selected from the group consisting of polyolefins, polyesters, polyamides, polycarbonates, polyacetals, mixtures and copolymers thereof. Manufacturing method. The pressure-sensitive adhesive tape formed by laminating the surface on which the silicone release layer of the antistatic release film of claim 1 is coated with the surface of the adhesive base adhesive.

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