JPH05331500A - Antistatic natural leather - Google Patents

Abstract

PURPOSE:To quickly eliminate the surface potential difference of a finished coating layer of a natural leather to prevent the electric shock and disagreeable feeling on the body without lowering the strength, etc., of the coating layer. CONSTITUTION:An electrically conductive layer 2, 7 or 11 composed of a urethane-based binder, etc., mixed with an electrically conductive substance such as carbon is applied to a surface of a natural leather (a) interposing an adhesive layer 1, 6 or 10 and the surface of the electrically conductive layer 2, 7 or 11 is coated with plural protection layers 3-5, 8, 9 or 12, 13 to form a finish coating layer (b), (c) or (d).

Description

Detailed Description of the Invention

[0001]

This invention relates to antistatic natural leather.

[0002]

2. Description of the Related Art Conventionally, a fabric or a knit fabric is protected from static electricity by polymerizing a conductive layer such as a carbon-containing backing layer on the back surface of the fabric or synthetic leather. It is known that a conductive layer such as a foam layer containing a substance is polymerized and a protective layer such as polyurethane is further polymerized on the surface thereof.

[0003]

[Problems to be Solved by the Invention] Now, seats of automobiles,
Antistatic of natural leather used for shoes or various kinds of clothing is carried out by polymerizing a conductive layer such as a carbon-containing backing layer on the back surface thereof as in the case of the above-mentioned woven fabric or knit fabric, and the conductive layer is formed. Is partly peeled off during the finishing process of the leather manufacturing process, or its conductive layer is fragile because only conductive material such as carbon is mixed,
During use as the product, there is also a defect such as partial peeling off or cracking.

In addition, since the conductive layer is located on the back surface of the natural leather, the distance from the leather surface, which generates static electricity due to friction, to the conductive layer is increased, so that the discharge effect of the product is weakened. There are drawbacks.

Similarly, when the antistatic of the natural leather is carried out by directly polymerizing a conductive layer such as a foam layer containing a conductive substance on the surface of the natural leather as in the case of the synthetic leather,
Since the amount of the conductive substance required to obtain the desired conductivity is mixed, the adhesion of the layer to the natural leather surface is deteriorated, and the strength of the finish coating layer on the surface including this conductive layer is significantly increased. However, there is a drawback in that the quality of the product is significantly deteriorated.

The inventors of the present invention have earnestly studied the development of an antistatic natural leather that does not have these drawbacks, and have completed the present invention.

[0007]

The antistatic natural leather according to the present invention comprises a finish coating layer b provided on the surface of natural leather a.
Conductive layers 2, 7 and 11 are provided in the form of a sandwich in ~ d. The conductive layers 2, 7, 11 are provided on the surface of the natural leather a via the adhesive layers 1, 6, 10, and the surfaces of the conductive layers 2, 7, 11 are covered and protected by a plurality of protective layers. There is. Further, it is effective to form the conductive layers 2, 7 and 11 by mixing a conductive material such as carbon into a urethane-based binder or the like.

[0008]

According to the present invention, the static electricity generated by friction on the surface of the natural leather, more specifically the surface of the finish coating layer, flows to the conductive layer and the potential difference on the surface is eliminated.
No shock or discomfort to the human body.

[0009]

EXAMPLES The antistatic natural leather of the present invention will be described in detail below with reference to the examples shown in the drawings. FIG. 1 is a partially enlarged cross-sectional view of a first embodiment used for a seat of an automobile or the like, in which a is, for example, silver-peeled natural leather, and b is a finish coating layer provided on the silver surface (surface) of the natural leather a. is there.

The finish coating layer b is formed by sequentially laminating the adhesive layer 1, the conductive layer 2, and the protective layers 3 to 5 on the surface of the natural leather a.
An example of the composition of each layer is shown in Table 1, and each layer was formed by spray coating.

[0011]

[Table 1]

If the carbon concentration is less than 15% of the solid content of the coating resin, the conductivity of the conductive layer 2 is drastically reduced. Is desirable. The conductive layer 2 is
Although it contains carbon which is a conductive substance, it is formed on the surface of the natural leather a through the adhesive layer 1 made of an acrylic binder having fine particles, so that the conductive layer 2 is directly formed on the surface of the natural leather a. There is no fear that the degree of adhesion will deteriorate as in the case of the above.

Further, the conductive layer 2 is protected by the protective layers 3 to 5 made of urethane type binder having a high film-forming effect and does not expose the outer surface, so that the color due to the inclusion of carbon as a conductive substance. It has no defects such as drop or strength.

FIG. 2 is a partially enlarged sectional view of the second embodiment used for safety shoes, where a is, for example, silver-peeled natural leather, and c is a finish coating layer provided on the silver surface (surface) of the natural leather a. Is.

The finish coating layer c is formed by sequentially laminating the adhesive layer 6, the conductive layer 7, and the protective layers 8 and 9 on the surface of the natural leather a.
An example of the composition of each layer is as shown in Table 2. The adhesive layer 6 is formed by roll corta coating, the conductive layer 7, the protective layer 8,
All of 9 are formed by spray coating.

[0016]

[Table 2]

If the carbon concentration is less than 15% of the resin solid content of the coating resin, the conductivity of the conductive layer 7 will be drastically reduced. Therefore, the conductivity of at least 15% and the resistivity of about 10 MΩ or less are ensured. Is desirable.

The conductive layer 7 contains carbon, which is a conductive substance, but is formed on the surface of the natural leather a through the adhesive layer 6 made of an acrylic binder having fine particles. There is no fear that the degree of adhesion will deteriorate as in the case of being directly formed on the surface of the natural leather a.

Further, the conductive layer 7 is protected by the protective layer 8 made of urethane type binder having a high film-forming effect and the protective layer 9 containing the nitrified cotton lacquer and does not expose the outer surface. There is no defect such as discoloration or strength due to the operation.

FIG. 3 is a partially enlarged cross-sectional view of a third embodiment used for clothing, where a is a silver-peeled natural leather, and d is a finish coating layer provided on the silver surface (surface) of the natural leather a. is there.

The finish coating layer d is formed by sequentially laminating the adhesive layer 10, the conductive layer 11, and the protective layers 12 and 13 on the surface of the natural leather a. An example of the composition of each layer is shown in Table 3, and each layer was formed by spray coating.

[0022]

[Table 3]

If the carbon concentration is less than 15% of the coating resin solid content, the conductivity of the conductive layer 11 will be drastically reduced. Therefore, the conductivity of the conductive layer 11 should be at least 15% and the resistivity of about 10 MΩ or less should be ensured. Is desirable.

The conductive layer 11 contains carbon, which is a conductive substance, but is formed on the surface of the natural leather a through the adhesive layer 10 made of an acrylic binder having fine particles. There is no fear that the degree of adhesion will deteriorate as in the case of being directly formed on the surface of the natural leather a.

Further, the conductive layer 11 is protected by the protective layers 12 and 13 made of urethane type binder having a high film-forming effect and does not expose the outer surface, so that the color due to the inclusion of carbon, which is a conductive substance, It has no defects such as drop or strength.

[0026]

As is clear from the above description,
According to the present invention, the following effects can be obtained.

Static electricity generated by friction on the surface of the natural leather, more specifically on the surface of the finish coating layer, flows to the conductive layer and eliminates the potential difference on the surface, so that no shock or discomfort is given to the human body. ..

Since the conductive layer is provided as a sandwich in the finish coating layer provided on the surface of the natural leather,
In other words, the conductive layer contains a conductive substance such as carbon, but since the conductive layer is not formed directly on the surface of the natural leather, the adhesiveness does not deteriorate, and the conductive layer is exposed on the outer surface. Therefore, there is no color fading due to a conductive material such as carbon, and the strength of the finish coating layer can be sufficiently secured.

[Brief description of drawings]

FIG. 1 is a partially enlarged sectional view of a first embodiment of an antistatic natural leather of the present invention used for a seat of an automobile or the like.

FIG. 2 is a partially enlarged sectional view of a second embodiment of the antistatic natural leather of the present invention used for safety shoes.

FIG. 3 is a third example of the antistatic natural leather of the present invention used for clothing.
It is a partial expanded sectional view of an Example.

[Explanation of symbols]

 a Natural leather b-d Finish coating layer 1,6,10 Adhesive layer 2,7,11 Conductive layer 3-5 Protective layer 8,9 Protective layer 12,13 Protective layer

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Toshiharu Kubota 6363 Matsuo Arai, Iida City, Nagano Prefecture, Miyauchi Sangyo Co., Ltd. Inventor Hiroshi 6363 Matsuo Arai, Iida City, Nagano Prefecture Miyauchi Sangyo Co., Ltd. (72) Inventor, Muneyuki Shimaoka 6363 Matsuo Arai, Iida City, Nagano Prefecture Miyauchi Sangyo Co., Ltd.

Claims (3)

[Claims] 1. An antistatic natural leather, characterized in that a conductive layer is provided in a sandwich form in a finish coating layer provided on the surface of the natural leather. 2. The charging according to claim 1, wherein the conductive layer is provided on the surface of the natural leather via an adhesive layer, and the surface of the conductive layer is covered and protected by a plurality of protective layers. Prevents natural leather. 3. The antistatic natural leather according to claim 1, wherein the conductive layer is formed by mixing a conductive material such as carbon into a urethane binder or the like.