JPS641592B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to suede-like artificial leather having a unique surface effect due to a combination of a change in the state of the surface fluff and a coloring effect.

Conventionally, methods for imparting an uneven pattern by embossing or a method for imparting a printed pattern are known as means for changing the appearance or texture of the surface of suede-like artificial leather. However, with the former method, it is difficult to permanently maintain the uneven pattern, and the effect is easily erased by cleaning, etc., and with the latter method, there is no change in the state of the surface fuzz, resulting in a three-dimensional effect. It is not possible to perform rich surface modification.

The present invention aims to provide suede-like artificial leather with a new appearance by combining changes in the state of the surface fuzz and dyeing effects. Suede-like artificial leather that is impregnated with a substance and has dense fluff made of fine fibers of 0.5 denier or less on the surface, and the surface is made of ultra-fine and/or shortened fluff fibers. This suede is made by dissolving the fine fibers into a part of the surface fluff layer of the suede-like artificial leather. Alternatively, it can be obtained by printing with a printing paste containing a damaging substance and a deep-colored or different-colored dye, followed by steaming or dry heat treatment to make the fluff fibers extremely fine and/or short, and at the same time coloring this part.

First, the suede-like artificial leather of the present invention has a fiber base material made of nonwoven fabric, knitted fabric, etc., polyurethane,
It is made by impregnating and integrating an elastic polymer substance such as synthetic rubber, and has a dense fluff formed by raising on its surface, and in particular, the fluff fiber is made of fine fibers of 0.5 denier or less. The fine fibers are
This is necessary in order to easily make a part of the fluff fibers extremely fine or short by the treatment described below. A conventionally known preferred suede-like artificial leather includes a fiber base material consisting of fine fibers or fine fiber bundles of 0.5 denier or less, and has a part of the base fibers exposed on the surface by raising. be.

In the present invention, ultra-fine means to be made thinner than the original fluff fiber, and shortening means to be made shorter than the original fluff fiber, preferably the original fluff fiber. The thickness or length shall be less than 1/2 of that of In particular, in the present invention, the fact that the fluff fibers are partially made both ultra-fine and shortened gives a concave effect to the fluff layer, three-dimensionally changing the fluff state on the surface, and creating an uneven effect on the surface fluff layer. This is convenient because it allows you to emphasize more.

In the suede of the present invention, as described above, the part where the fuzz layer has been partially recessed is colored with an accent color to highlight the effect of the recess, and this accent color has a dark color effect on the ground color of the suede. These are selected as appropriate from those that impart a unique effect or a unique effect.

Fig. 1 is a schematic plan view showing the surface of the suede of the present invention, and Fig. 2 is an enlarged cross-sectional view thereof, in which 1 is the suede base portion, 2 is the fine fiber of the surface fluff layer, and 3 is ultra-fine or shortened fiber. The fluffed fibers 4 show the accent color and the concave pattern portion due to the ultra-fine and shortened fluff fibers.

In the suede of the present invention, a substance that dissolves or damages the fine fibers and an elastomeric polymer substance of the fine fibers and the base material are added to the surface of the suede-like artificial leather, which has a dense fluff layer made of fine fibers on the surface. Printing paste containing the dye to be dyed is printed using a screen printing method, roller printing method, etc., and then steamed or dry heat treated to at least partially dissolve or damage the fluffy fibers and at the same time remove the fibers and elastic weight of this part. It is produced by coloring the combined material and making the fluff fibers in the printed area extremely fine and/or short to give the fluff layer in this area a concave pattern and at the same time an accent color effect. The substance that dissolves or damages the fluff fibers can be appropriately selected depending on the material of the fluff fibers. for example,
In the case of nylon fibers, strong acids such as sulfuric acid or metal salts thereof, in the case of polyesters, alkali or alkali metal salts, and in the case of polyacrylonitrile, dimethylformamide, etc. are used. It is desirable that these substances do not interfere with the dyeing operation or significantly damage the elastic polymer material. Further, the processing conditions are carried out in accordance with ordinary textile printing methods, and by appropriately selecting these conditions, the degree of ultrafineness and/or shortening of the fluff fibers can be controlled.

In the method of the present invention, the fluff fibers must be thin in order to easily impart a concave effect to the fluff layer by making the fluff fibers extremely fine or short. For this purpose, it is effective that the thickness of the fluff fiber is 0.5 denier or less. In order to significantly achieve the effects of the present invention and to obtain a suitable appearance and feel, it is desirable that the fluff fiber length is 0.1 to 5 mm.

After the fluff fibers are made ultra-fine and/or short and fixed with dye, they are neutralized if necessary, the glue is removed by washing with water, and the fibers are dried and finished.

According to the present invention, the surface fluff fibers become ultra-fine and shortened according to an arbitrary pattern, and the appearance changes due to the effect of depressions (steps), and the color effect of the depressions creates a new appearance that is not found in conventional suede. It is possible to obtain suede-like artificial leather with a texture that is expected to significantly expand its range of uses for clothing and interior design.

Example 1 An entangled nonwoven fabric made of a bundle of 0.005 to 0.01 denier fibers made of nylon was coated with polyoxyethylene.
Polyethylene propylene adipate-based polyurethane is integrated by impregnation and coagulation, and the surface is brushed to prepare a light brown colored suede-like artificial leather having dense fluff of 0.5 to 0.7 mm length made of the nylon fine fibers. A fine folded pattern is printed on this surface using a printing paste having the following composition by a screen printing method.

Dye Lanyl Brown GR (made into a paste with water at 40℃) 30g Printing paste Yuzen paste Etherized starch Carboxymethyl cellulose 50% 25% 25%
500g Concentrated sulfuric acid 65゜Be 15c.c. Anhydrous aluminum sulfate saturated solution 100c.c. Water Total balance 1000g After drying this, steam for 40 minutes under normal pressure, wash with water at 40℃ for 15 minutes, neutralize with ammonia aqueous solution, It was then washed with water and dried to finish.

As a result, the printed area is colored dark brown, and the fluff fiber length in this area is 0.2 mm.
As a result of further fineness, the obtained suede-like artificial leather had a crease pattern that was emphasized due to the step effect of the fluff layer and the color effect of the recessed areas.

Example 2 0.01~ made of polyethylene terephthalate
Polytetramethylene ether polyurethane is impregnated and coagulated into an entangled nonwoven fabric made of a bundle of 0.4-denier fibers, and the surface is coated with a 0.5-0.7 mm polyethylene terephthalate fine fiber.
A suede-like artificial leather is prepared in which long fluff is densely present and the surface is colored in a light gray color, and a printing paste having the following composition is applied to the surface by a screen printing method to form fine creases. Stamp the pattern.

Dye Navy Blue KB (made into a paste with 40°C water) 30g Printing paste Brite rubber 200g NaOH (40°Be) 400g Weight loss accelerator (cecyltrimethylammonium bromide) 20g water 350g total 1000g After drying this, After steaming for 20 minutes under normal pressure, leave it in a high temperature room at 80-90°C for 2 hours.
After that, wash with water at 40℃ for 5 minutes and acetic acid aqueous solution (2
cc/) and then dried to finish.

As a result, the printed area is colored deep blue, and the length of the fluff fibers in this area is less than 0.2 mm.As a result of further miniaturization, the resulting suede-like artificial leather has a step effect in the fluff layer. The crease pattern was emphasized by the color effect of the concave parts.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view of the product of the present invention, and FIG. 2 is an enlarged cross-sectional view thereof, in which 1 is a base, 2 is a fluff fiber, 3 is an ultra-fine and/or shortened fluff fiber, and 4 is a schematic cross-sectional view of the product. It shows a concave portion formed by ultra-fine and/or shortened fluff fibers.

Claims (1)

[Scope of Claims] 1. A suede-like artificial leather in which a fiber base material is integrally impregnated with an elastic polymer substance and fluff consisting of fine fibers of 0.5 denier or less is densely present on the surface,
A textured suede characterized by having, on its surface, a portion formed of ultrafine and/or shortened fluff fibers and having a dark or different accent color. 2 Dissolve the fine fibers in a part of the surface fluff layer of suede-like artificial leather, in which the fiber base material is impregnated with an elastic polymer substance and fluff consisting of fine fibers of 0.5 denier or less is densely present on the surface. Or, it is characterized by printing with a printing paste containing a damaging substance and a deep-colored or different-colored dye, followed by steaming or dry heat treatment to make the fluff fibers extremely fine and/or short, and at the same time color this part. Manufacturing method for kinky suede.