KR20070010861A - Release piece with silicon coating and process for preparation of the same - Google Patents

Abstract

A method for manufacturing silicone-coated release cloths is provided to secure good heat resistance and tensile strength by making the silicone-coated release cloth of fibrous textiles and to sufficiently endure high heat. The method for manufacturing silicone-coated release cloths(10) comprises the steps of: preparing a textile cloth(11) formed by weaving fibers; coating the upper surface of the textile cloth with polyurethane(12) and drying the textile cloth at 100~120‹C for 5 minutes; applying silicone(13) on the upper surface of a polyurethane-coated layer and drying the silicone at 100~120‹C for 5 minutes; and adhering a hot melt adhesive film(14) on the textile cloth by pressing the hot melt adhesive film at 100~140‹C by using the other silicone-coated release cloth(20).

Description

Release Piece with Silicon Coating and Process for Preparation of the Same

1 is a cross-sectional view of a silicone coated release fabric according to the present invention.

Figure 2 is a state diagram showing a state of adhering the hot melt adhesive film to the fabric fabric according to the present invention.

Figure 3 is a state showing the state of bonding the hot melt adhesive film to the decorative paper using a silicone coated release fabric according to the present invention.

* Explanation of symbols for main parts of drawings *

10: silicone coated release fabric 11: fabric fabric

12: polyurethane 13: silicone

14: hot melt adhesive film 20: separate release fabric

30: decorative paper

The present invention relates to a silicone-coated release fabric and a method of manufacturing the same, and more particularly, a hot-melt adhesive film on a surface of a decorative paper for adhering a decorative paper formed with various stickers or printed materials having various patterns to an upper of a shoe or a fabric of a bag body. It is to be able to coat, it is possible to complete peeling without leaving the hot melt adhesive film on the release fabric, in particular, the excellent heat resistance and tensile strength of the silicone coating release fabric, characterized in that the long service life can be used long The manufacturing method is related.

Generally, a sheet or sticker formed with various patterns is attached to the upper of the shoe or the fabric of the bag body, and in this case, the edge of the decorative paper that is attached to the upper of the shoe or the fabric of the bag body to form a pattern is rough. Not only is the appearance unsightly, but when used for a long time, the edge of the decorative paper is easily damaged.

Therefore, in order to solve the above problems by using a release paper or a release film, a method of attaching a decorative paper formed with a pattern of adhesion in Korea Patent Publication No. 1995-0014919 (1995. 12. 18.) adhesion on various stickers or prints As a release paper to which a lamination film is attached, it has been published about a "method of producing a polypropylene film having releasability" in which a silicone resin is deposited on one surface of a Bi-Axially Oriented Poly Propylene (BOPP) film. These polypropylene films are easily wrinkled due to heat, and they are easily wrinkled or weak because they are easily torn because of their low strength. There was this.

Accordingly, the present inventors have a technique known in Korea Patent Publication No. 10-365049 (registered on Dec. 4, 2002), a method for forming an embossed pattern of embossed pattern on the surface of a new leather or synthetic leather as an adherend using a release fabric. By immersing a fiber fabric such as cotton fabric, flax fiber, glass fiber, rock wool fiber, etc. in the silicone compound, and then pressing and vulcanizing it with an embossed roller or emboss press with embossed patterns, the polypropylene is made in view of the principle of a silicone release pad. The present invention has been completed by applying a silicone coated release fabric instead of a release paper to a method of adhering a decorative paper having various patterns and colors on a surface of an adherend.

Therefore, in order to solve the problems described above, the present invention uses a silicone coated release fabric, which is a textile fabric material, instead of a polypropylene film release paper that is easily wrinkled by heat, and is easily wrinkled or weak in strength. A silicone-coated release fabric and a method of manufacturing the same, characterized in that it can be repeatedly used as a release paper by adhering a decorative sheet having various patterns and colors having printed patterns and colors to the upper surface of a shoe or a fabric of a bag body. In providing.

In particular, since the polyurethane coating layer and the silicone coating layer completely block the contact between the release fabric coated with the silicone and the hot melt adhesive film, the present invention may not only induce complete peeling so that the hot melt adhesive film does not remain in the release fabric. Since the material of the coated release fabric is a textile fabric, the release fabric can withstand excessive tension such as winding, as well as high-temperature work for the adhesion of a hot melt adhesive film to the upper of an adherent shoe or the fabric of a bag body. It is characterized by a very long life.

The present invention provides a hot melt adhesive film to the upper of a shoe or a fabric of a bag body by coating a textile fabric woven with a polyurethane, coating a silicone on the top, and a hot melt film on the top. The present invention relates to a silicone-coated release fabric and a method for manufacturing the same, which can be completely peeled off from the release fabric without remaining a hot melt adhesive film upon coating, and in particular, excellent in heat resistance and tensile strength, and thus can be used for a long time. .

Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view of a silicone coated release fabric according to the present invention, the silicone coated release fabric 10 is a woven fabric 11 woven with fibers, polyurethane 12, silicon 13, It is characterized in that the coating in the order of the hot melt film (14).

The fabric fabric 11 used in the present invention is preferably a polyester fabric, and the polyester fabric is a woven fabric using polyester fibers which have been stretched to have little or no elongation, and such polyester fabric has high tension, It has low hygroscopicity, excellent thermal plasticity and chemical resistance, and in particular, it has excellent heat resistance, so that it is not damaged even during the repeated heating process for coating the hot melt adhesive film on the upper of the shoe or the fabric of the bag body, and the winding after peeling. It does not occur and the service life becomes long.

In addition, the polyurethane 12 is applied to the polyester fabric and is infiltrated tightly into the fabric woven with fibers, thereby coating the polyester fabric and the hot melt adhesive film even when damage occurs to the silicon coated on the coated polyurethane. The contact with is completely blocked, allowing complete peeling without leaving any residue of the hot melt adhesive film on the polyester fabric. In particular, the hot melt adhesive film whose main material is polyethylene, ethylene vinyl acetate, and acryl does not come out of compatibility with polyurethane, and serves to prevent the hot melt adhesive film from melting and remaining on the polyester fabric.

Since the silicone 13 has an effect of preventing the adhesion of the polyester fabric and the hot melt adhesive film to the secondary with the polyurethane 12 coating layer, the silicone 13 is coated on the decorative paper with the hot melt adhesive film coated on the silicone coated release fabric. The hot melt adhesive film is completely coated on the decorative paper without any remaining in the silicone coated release fabric.

The hot melt adhesive film 14 usable with the silicone coated release fabric of the present invention is preferably selected from one of polyethylene, ethylene vinyl acetate, and acrylic-based hot melt adhesive film.

And the manufacturing method of the silicone coating release fabric of the present invention

Iii) preparing a textile fabric woven from fibers;

Ii) coating a polyurethane on top of the fabric fabric, and drying and coating at 100-120 ° C. for 5 minutes;

Iii) coating silicon on the coated polyurethane coating layer, and drying by coating at 100-120 ° C. for 5 minutes;

Iii) bonding the hot melt adhesive film to the fabric fabric by using a separate silicone coated release fabric at 100 to 140 ° C .;

It is manufactured through.

In the step iii), the fabric fabric is most preferably using a polyester fabric.

Preferably, the coating layer of polyurethane in step ii) has a thickness of 30 to 100 mm. When the polyurethane is applied to less than 30 mm, the polyurethane coated and coated on the polyester fabric is too thin and tightly infiltrated. Since the contact between the hot melt adhesive film and the polyester fabric is not completely blocked, there is a problem that the hot melt adhesive film may remain on the polyester fabric, and when applied to more than 100 mm, a synergistic effect due to the over application is insignificant. Economical deterioration.

And in order to dry and coat the applied polyurethane, it is preferable to dry at 100 ~ 120 ℃ for 5 minutes, the drying time is prolonged because the drying does not occur quickly at a temperature of less than 100 ℃, A problem occurs that bubbles are generated at temperature conditions.

In addition, it is preferable that the thickness of the silicone coating layer in step iii) is 10 to 40 mm, and when applied to less than 10 mm, the hot melt adhesive film is melted and coated on a decorative paper, so that perfect peeling does not occur when peeling. When it is applied over 40 mm, the synergistic effect due to the over application is insignificant and the economical efficiency is lowered.

In addition, in order to dry and coat the applied silicone, it is preferable to dry at 100-120 ° C. for 5 minutes, but drying does not occur quickly at a temperature of less than 100 ° C., resulting in a long drying time and a temperature exceeding 120 ° C. Under the conditions, problems due to bubble generation occur.

The step iii) is a step of adhering a hot melt adhesive film to the fabric using a separate silicone coated release fabric, wherein the hot melt adhesive film is selected from one of polyethylene, ethylene vinyl acetate, and acrylic-based hot melt adhesive film. It is desirable to. The thickness of the hot melt adhesive film is not particularly limited, but may be appropriately adjusted according to the size of the sticker or decoration attached to the adherend or the material of the material. In addition, the coating temperature of the hot melt adhesive film is different depending on the type of hot melt adhesive film, but is preferably 100 ~ 140 ℃.

The process of step iii) will be described in detail with reference to FIG. 2.

The hot melt adhesive film 14 is arranged in the order of the hot melt adhesive film 14 between the fabric fabric (A) coated with polyurethane and silicone in advance and the separate release fabric 20 and passes between the upper and lower rollers. Between the fabric fabric (A) and the separate release fabric 20 is adhered to the fabric fabric (A) by heat compression of the upper and lower rollers, only the separate release fabric (20) is separated separately. At this time, the heating temperature is preferably a temperature of 100 ~ 140 ℃. If the heating temperature is less than 100 ℃, the hot melt adhesive film is not completely melted and the coating is not made, if it exceeds 140 ℃, the adhesive strength is reduced due to excessive melting of the hot melt adhesive film.

3 is a state diagram showing a state in which a hot melt adhesive film is adhered to a decorative paper using a silicone-coated release fabric according to the present invention, and a fabric fabric 11 and a polyurethane 12 and a silicone 13 thereon. When the silicone coated release fabric 10 coated in the order of the hot melt adhesive film 14 and the decorative paper 30 having various patterns are passed between the upper and lower rollers, the hot melt adhesive film 14 is heated by compression of the rollers. Completely peeled from the silicon coated release fabric 10 is to be bonded to the decorative paper (30).

As a method of decorating various patterns such as the upper of the shoe or the fabric of the bag using the decorative paper 30, hot melt adhesive by the above method on the decorative paper 30 formed so that various patterns can be separated in advance. After bonding the film 14 to form various patterns on the upper of the shoe or the fabric of the bag by thermal molding and high frequency, the edge surface of the decorative paper 30 attached to the upper of the shoe or the fabric of the bag is smooth. Since the appearance is not only beautiful but also not damaged after a long period of time, there is an advantage that can maintain the initial splendor.

At this time, the bonding temperature is different depending on the type of hot melt adhesive film, but the temperature of 100 ~ 140 ℃ is preferred.

Hereinafter, the silicone coating release fabric according to the present invention and a manufacturing method thereof will be described in detail by examples.

(Examples 1 to 3 and Comparative Example 1)

Examples 1 to 3 each apply 100 mm of polyurethane to a polyester fabric, dry and coat at 100 ° C. for 5 minutes, apply 40 mm of silicon onto the coated polyurethane, and at 100 ° C. for 5 minutes. Dry coating to prepare a silicone coated release fabric.

On the other hand, Comparative Examples 2 to 4 each coated 40 mm of silicone on a polyester fabric, dried and coated at 100 ° C. for 5 minutes, and bonded a hot melt adhesive film using a separate release fabric to prepare a silicone coated release fabric. It was.

(Example 1 and Comparative Example 2)

The hot melt adhesive film adhered to the decorative paper was tested using polyethylene having a main raw material.

(Example 2 and Comparative Example 3)

The hot melt adhesive film adhered to the decorative paper was tested using ethylene vinyl acetate as the main raw material.

(Example 3 and Comparative Example 4)

The hot melt adhesive film adhered to the decorative paper was tested using acrylic having a main raw material.

(Comparative Example 1)

General silicone coated release paper (paper) was used, and the hot melt adhesive film adhered to the decorative paper was tested using polyethylene as the main raw material.

Then, a temperature of 110 ° C. was applied to attach the respective hot melt adhesive films to the decorative paper.

TABLE 1

division Example Comparative example One 2 3 One 2 3 4 Peel Strength (g / 15㎜) 60 60 55 65 75 75 75 Tensile Strength (㎏ / ㎠) 6.5 7.0 7.0 1.5 1.5 One 1.5 Tear strength (㎏) 200 190 200 0.8 180 190 180 Pollution degree ◎ ◎ ◎ × △ △ △

1) Peeling strength

Using the Examples and Comparative Examples, respectively, the hot-melt adhesive film was coated on the decorative paper at a temperature of 100 ° C., left for 2 minutes until the temperature reached 30 ° C., and then peeled off at an angle of 180 degrees at a speed of 5 m / min. (g / 15 mm) was measured and evaluated by peel strength using a universal testing machine (Instron Co., Ltd.).

The less the peel strength, the better the releasability.

2) tensile strength

Tensile strength of the film specimens was measured according to the ASTM D 882 method using a response test meter.

3) tear strength

The experiment was conducted according to KS K 0535.

4) Degree of contamination of heterogeneous fabric

Using the Examples and Comparative Examples, the process of coating the hot melt adhesive film on the decorative paper was repeated 50 times with the same sample, followed by peeling and winding, and visually confirmed and evaluated the degree of contamination of each Example and Comparative Example.

◎: No pollution after 50 repetitions

○: Pollution occurs after 30 to 40 repetitions

△: pollution occurs after 20-30 repetitions

×: pollution occurs within 10 times

As shown in Table 2, Examples 1 to 3 were found to be very easy to peel off due to low peel strength, and in particular, a polyester fabric woven from fibers showed very good tensile and tear strength. When the polyurethane is coated on the polyester fabric and the hot melt adhesive film is coated on the decorative paper with a release fabric coated with silicone on the polycetane, the peeling is performed completely, without peeling off the remaining contamination of the hot melt adhesive film on the release fabric. It was shown.

Comparative Example 1 is an experiment using a silicone coated release paper (paper), the tensile strength and tear strength is significantly low, the release paper is damaged during the peeling process after coating the repeated hot melt adhesive film on the decorative paper and its service life In addition to being very short, after the release of the release paper, the hot melt adhesive film remained on the release paper, resulting in contamination on the release paper.

In addition, Comparative Examples 2 to 3 is a coating of the polyester fabric by coating the silicone without coating the polyurethane, and the hot melt adhesive film on the polyester fabric portion where the silicone does not completely penetrate the polyester fabric and is not coated with silicone. The contamination occurred due to the, and accordingly, not only the complete coating of the hot-melt adhesive film on the decorative paper was performed but also the peeling was not performed smoothly, resulting in high peel strength.

The silicone coated release fabric of the present invention has excellent heat resistance and tensile strength unlike a conventional polypropylene film release paper because the material of the fabric is a textile fabric, and not only high-temperature work for bonding the hot melt adhesive film to the decorative paper but also excessive tension such as winding. Because of its ability to withstand, the service life is very long, and the double release layer of the polyurethane coating layer and the silicone coating layer is formed between the fabric fabric and the hot melt adhesive film, thereby completely blocking the contact between the release fabric and the hot melt adhesive film. This has the advantage of inducing complete release.

Claims (6)

A fabric woven fabric (11) woven with fibers, and a silicone coated release fabric, characterized in that the coating on top of the polyurethane (12), silicon (13), hot melt adhesive film (14) in this order. The silicone coated release fabric according to claim 1, wherein the fabric fabric (11) is a polyester fabric. The silicone coated release fabric according to claim 1, wherein the hot melt adhesive film (14) is selected from one of polyethylene, ethylene vinyl acetate, and acrylic-based hot melt adhesive film. Iii) preparing a textile fabric woven from fibers; Ii) coating a polyurethane on top of the fabric fabric, and drying and coating at 100-120 ° C. for 5 minutes; Iii) coating silicon on the coated polyurethane coating layer, and drying by coating at 100-120 ° C. for 5 minutes; Iii) bonding the hot melt adhesive film to the fabric fabric by using a separate silicone coated release fabric at 100 to 140 ° C .; Method for producing a silicone coated release fabric, characterized in that the manufacturing through. According to claim 4, wherein the polyurethane in the step ii) silicone coated release fabric, characterized in that the coating of 40 ~ 100 mm. According to claim 4, wherein in the step iii) the silicon coated release fabric, characterized in that the silicon coating 10 ~ 40 mm.

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