JPH062989B2 - Leather-like plastic products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is a leather-like sheet, film, other furniture, a bag, a building which is colored like natural leather and has no partial or striped unevenness. It relates to plastic products such as sawn timber.

(Prior Art) Conventionally, leather has been dyed by immersing it in a dyeing solution or spraying it under the same conditions as much as possible and then averaging it.

(Problems to be solved by the invention) However, in the case of natural leather, there are portions that are easily impregnated with a dye or the like and portions that are difficult to be impregnated because the density of the leather differs depending on the body part of the animal. It is in a state of unevenness or partial unevenness, and in the case of artificial leather, dyeing unevenness compared to natural leather, coloring unevenness is less likely to cause arrow unevenness, and color tone like natural leather, It was difficult to give the texture and texture.

(Means for Solving Problems) Therefore, a plastic product which solves the above problems and is like a natural leather and is made of a thermoplastic resin 3 containing dry leather powder 2 in order to prevent coloring unevenness This is a leather-like plastic product in which the surface layer 3a on one surface is removed and the colored liquid 4 is impregnated from the removed surface 1a of the surface layer 3a.

(Function) In the present invention, the leather is crushed and dried to obtain the leather powder 2. Since the leather powder 2 is fine particles composed of protein and fat and has lubricity, the thermoplastic resin 3 is used. It is mixed evenly and uniformly, and since it is a dried particle, it does not suck the thermoplastic resin 3 liquid etc. and has good mixability, a homogeneous leather-like plastic product is obtained, and after being made into a product, Does not cause surface roughness due to moisture divergence.

Further, the surface layer 3a on the surface of the product is removed, and the surface layer 3a is removed.
The removing surface 1a is impregnated with the coloring liquid, and the removing surface 1a has the leather powder 2, and since the leather powder 2 is colored, it is similar to natural leather, and the leather powder 2 is evenly present. Colored evenly.

(Example) FIG. 1 shows a cross section of a colored product 1 of a leather-like plastic product according to the present invention, and 2 is a dried leather powder having a particle size of 50 to 250 mesh, which is used for cattle and horses. It is ideally 1 in the form of fine particles obtained by crushing leather such as leather, etc.
Particle size finer than 50 mesh is 60 wt%, 100-15
0 mesh is 20 wt%, 60-100 mesh is 12
The residual water content is about 3% by weight.

In the present specification, the leather-like plastic product means a plastic product molded in a block shape or a plate shape, a plastic product in a mold shape formed by using various molds, a sheet, a plastic product in a film shape, and the like. It is a generic term.

3 is a thermoplastic resin such as vinyl chloride, which is mixed in powder form with the leather powder 2 or is dissolved in a volatile solvent to form a resin solution and mixed by heat rolling with a calender roll, or Is used to make the plastic product 1 by molding techniques such as injection, extrusion, vacuum, hot pressing and the like.

The surface layer 3a, which is a resin material layer formed on the surface of the cloth at the time of normal molding, is removed with a cc line by cutting in slices. It may be cut by sanding. In this case, it is preferable to attach a reinforcing cloth on the back surface. The removal surface 1a may be raised by raising to give a suede tone.

The coloring is performed by impregnating the removal surface 1a of the surface layer 3a with a coloring liquid 4 in which a fine dye having fine particles is dissolved in water or a resin solution of an aqueous solution under pressure, or by coating the removal surface 1a. The pigment is impregnated, and in the case of a pigment, the penetrability is low and therefore a large amount adheres to the surface portion of the removal surface 1a. Therefore, it is preferable to use the pigment properly depending on this property.

In this case, the thermoplastic resin 3 is mixed with a coloring means (mainly a pigment) of the same kind as the color to be colored in advance to form the same color as the leather powder 2 part, and the coloring means is not mixed. Alternatively, a patchy pattern can be obtained by mixing a light color or a different color.

FIG. 4 shows another embodiment. In addition to the leather powder 2 and the thermoplastic resin 3, natural fibers such as cotton, hemp and wool, fibers obtained by crushing leather or nylon, ester, etc. Synthetic fiber,
Alternatively, the fibers 5 mixed with these natural fibers and synthetic fibers are mixed and entangled with the leather powder 2 to increase the strength, and the removal surface 1a of the surface layer 3a made of a resin material is embossed by a graining roll. It is attached.

In addition to the above, in order to have strength, cloth, paper, or a reinforcing cloth made of both cloth and paper may be attached or pressure-bonded to the inner surface or the back surface of the leather-like plastic product.

There is also a case where a foaming agent is mixed with the thermoplastic resin 3 to foam it to give a particularly soft feel to the eyes, and by making a large number of small holes from the removal surface 1a with a needle or a heated needle. In some cases, it has a leather-like appearance, and by containing water in the small pores, a natural leather-like moist or slightly grainy feel may be provided.

(Effect) As described above, since the leather-like plastic product according to the present invention is kneaded with the dry leather powder and the thermoplastic resin, the mixing is carried out uniformly, and especially the particle size of the leather powder is 50 to 250 mesh. For example, even without using talc or the like, a homogeneous plastic product having good mixing property can be obtained, the surface layer of the surface of the fabric of the product is removed, and an aqueous coloring liquid is impregnated and adhered from the removed surface. The whole is colored in a uniform color without unevenness, or is colored in a similar spot shape as a whole.

Also, even if you use leather scraps, you can get a good leather-like color, and even the inside of the plastic product is colored, and since the uniformly mixed leather particles are colored, it looks like a natural leather. Become.

In addition, since it is colored by impregnation with a coloring liquid, the molded fabric is not damaged, the naturalness of the leather is not lost, and because the leather powder is protected by the thermoplastic resin, there is a characteristic that there is little decolorization, etc. It is suitable as a sheet, a ceiling of a desk, an outer cover of a molded article, a sheet such as a wall material, a film, a bag, furniture, a fitting, an automobile interior part, and the like.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view of an essential part showing an embodiment of a leather-like plastic product according to the present invention, FIGS. 2 and 3 are enlarged sectional views of an essential part showing a coloring method thereof, and FIG. 4 is another embodiment. It is a principal part expanded sectional view which shows an example. DESCRIPTION OF SYMBOLS 1 ... Leather-like plastic product, 2 ... Leather powder, 3 ... Thermoplastic resin, 3a ... Surface layer, 4 ... Color liquid, 5 ... Fiber.

Claims (1)

[Claims] 1. A leather-like plastic product, characterized in that a surface layer of a plastic product made of a thermoplastic resin containing dry leather powder is removed, and a colored liquid is impregnated from the removed surface of the surface layer. .