JPH07877B2 - Method for manufacturing lightly dyed leather-like sheet products - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a cut piece obtained by cutting a leather-like sheet into a desired product shape, or a semi-finished product or a product obtained by sewing and / or joining at least a part of the cut piece. The present invention relates to a method for producing a leather-like sheet product which is dyed in a light color and has a color tone change on the surface of a piece.

[0002]

2. Description of the Related Art Conventionally, a leather-like sheet is dyed by a jigger dyeing machine which cuts a long product cut into a predetermined length into a dyeing machine.
It is performed by a wince dyeing machine, a liquid cloth reflux type dyeing machine, and the like. In this case, the dyed leather-like sheet has a uniform hue when viewed with a piece cut to make a product,
Depending on the product orientation, it is not possible to design products that emphasize the characteristics derived from the color tone. Further, the cut end of the cut leather-like sheet generally looks pale or whitish, and it is not preferable in appearance to commercialize the cut end as it is. For that purpose, it is known that in the production of a product, a dye liquid is permeated into a cut cut portion to dye it, and then that portion is heated and melted to form a film, which is disclosed in JP-A-55-152867. Methods for pre-coloring fibers and elastic polymers as materials have been proposed in JP-B-55-504 and JP-B-59-12785, but these methods increase complicated steps and increase cost. It just brings it, but it has not solved the problem.

Further, in the dyeing treatment of a long product, it is not possible to carry out all the steps in a tension-free state, so that the texture of the leather-like sheet after dyeing becomes stiff. Therefore, as a method for preventing the texture from becoming stiff during the dyeing treatment, Japanese Patent Publication No. 57-8232 proposes a dyeing treatment method for a leather-like sheet using a dyeing / finishing process of natural leather. In this method, a short leather-like sheet cut into a size (about the size of natural leather) suitable for charging a natural leather processing device, for example, a rotary drum called a drum is dyed by a method of adding a rubbing action. Therefore, the texture and the like are improved as compared with the conventional method for dyeing a long product.

[0004]

In the conventional dyeing method,
The leather-like sheet dyed in a light color shows the desorption of the dye due to soaping, and the surface color tone becomes uniform and monotonous.
Furthermore, it is difficult to match the hue of the surface with the hue of the cut end. In addition, even if the dyeing method of natural leather, which is an improved dyeing method, is applied, the texture and the like will be improved step by step, but the monotony of the above-mentioned surface tone and the color of the newly cut cut edge will be obtained. The unevenness does not improve.

The object of the present invention is that the surface of the product is not monotonous, the cut edges are colored in the same hue as the surface, and the appearance is different from that of conventional products, and the dimensional change of the product does not occur. The object is to produce a dyed leather-like sheet product which is small and has a good texture, and in particular, a product which is light-colored and has a change in surface tone.

[0006]

DISCLOSURE OF THE INVENTION The present invention is directed to a substrate comprising a fibrous sheet and an elastic polymer or a polymer containing an elastic polymer as a main component, and an elastic polymer or an elastic polymer as a main component on one surface of the substrate. A leather-like sheet provided with a coating layer of the polymer,
Alternatively, a leather-like sheet having a fiber raised surface formed on one surface of the base material is cut into a desired product shape, or a semi-finished product or a product obtained by sewing and / or joining at least a part of the cut product is a dyeing bath. It is a method for producing a lightly dyed leather-like sheet product, which is characterized by dyeing without tension in the interior, causing a change in color tone on the surface, washing with water without soaping, and drying to make the final product. is there.

The leather-like sheet used in the present invention is a fiber sheet such as a three-dimensional entangled nonwoven fabric of fibers or a woven fabric, and is selected from, for example, polyurethane elastomer, polyurethane copolymer, polyacrylic acid ester, synthetic rubber and the like. A base material obtained by containing an elastic polymer, or a polymer obtained by mixing a polymer such as a polyester elastomer, a polyolefin elastomer, polyester, polyamide, or polyvinyl chloride in the elastic polymer, on one surface of the base material A polymer finishing layer mainly composed of the elastic polymer or a polymer mainly composed of the elastic polymer, which is provided with a porous or non-porous coating layer and whose surface is mainly composed of the elastic polymer containing a coloring agent, and / or
Or a leather-like sheet which is provided with a polymer finishing layer mainly composed of an elastic polymer containing no colorant, and is embossed on the surface in the process of commercialization, or buffing etc. on one surface of the base material A leather-like sheet that has been treated to form a napped fiber surface. Particularly preferred leather-like sheet is a three-dimensional entangled nonwoven fabric composed of ultrafine fibers or ultrafine fiber bundle fibers obtained by bundling a large number of ultrafine fibers, special porous fibers having a large number of holes or voids in the fiber axis direction, and the like. A leather-like sheet using a base material containing a polyurethane elastomer or a polymer mainly composed of a polyurethane elastomer.

The leather-like sheet has a desired product shape, for example,
Apparels such as clothing, bags, belts, shoes for men's shoes, women's shoes, casual shoes, children's shoes, and various gloves are cut into pieces. In this case, before or after cutting, it is also preferable that the surface of the leather-like sheet is embossed with a concave-convex pattern, or designed such as punching. The cut pieces may be used as they are or in the form of a semi-finished product or a product in which at least a part of the cut pieces is sewn and / or joined alone or together with other materials. Further, the product may be attached with accessories such as metal parts if necessary.

The dyeing method may be any dyeing method as long as it is a tension-free dyeing method, for example, a method of moving an object to be dyed, such as a dipping method in a tank or a drum type dyeing machine. A method of circulating a dyeing solution such as a dyeing method using an Overmayor dyeing machine can be used. Further, the dye composition and the dyeing conditions are appropriately selected depending on the constituent materials of the material to be dyed. Then, it is dyed in a light to medium color by a dipping method in which it is treated in a dyeing solution with a desired dye composition and dyeing conditions, the cut surface of the leather-like sheet is dyed, the surface is dyed in a desired color tone, and the color tone of the surface is When the change occurs, the material to be dyed is washed with water without soaping and dried in a free state.

When dyed with cut pieces or semi-finished products, they are sewn and / or joined alone or with other materials to be processed into products, and surface gloss adjustment, shape correction, attachment of accessories, etc. To make the final product. Also,
When dyed with a product, adjust the gloss of the surface, modify the morphology, and attach accessories as necessary to make the final product.

The obtained product shows a slight change in color tone in the cut surface and subsequent surface portions, surface portions around holes and stitches and other surface portions, and concave and convex portions on the embossing surface. As a result, a product that is attractive in product design can be obtained.

[0012]

According to the present invention, a leather-like sheet made of different materials is processed into a cut piece, a semi-finished product or a product, which is dyed in a dyeing solution to a light to medium color, and the cut surface is dyed to obtain a desired surface color tone. The dyed material that has been dyed on the surface and whose surface color change has occurred is washed with water without soaping and dried, so that the cut surface of the dyed material and the subsequent surface part, the surface part around holes and stitches, etc. It is possible to commercialize while leaving a slight change in color tone between the middle part of the surface, the concave part and the convex part of the embossing surface.

[0013]

EXAMPLES Next, embodiments of the present invention will be described with reference to Examples. Parts and% in the examples relate to weight unless otherwise specified.

Example 1 A polyurethane elastomer containing an easily dyeable polyurethane elastomer was mainly formed on one surface of a base material containing a porous polymer mainly composed of polyurethane elastomer in an entangled nonwoven fabric of nylon ultrafine fiber bundle fibers. The non-porous polymer coating layer was applied, and further, a leather-like sheet [I] having a satin embossed surface on the coating layer, a small portion for shoe upper, that is, a pump portion, a tongue portion, a tape portion, In addition, each piece was cut, and after patterning by punching, the sewn shoe upper was placed in a dyeing tank and dyed by the dip dyeing method under the following conditions.

Dyeing Raney Brown GP 0.04% owf (Sumitomo Chemical Co., Ltd. metal complex salt dye) Raney Yellow G 0.01% owf (Sumitomo Chemical Co., Ltd. metal complex salt dye) Bath ratio 1: 100 Bath temperature 70 ° C Shake for 10 minutes in the bath

After dyeing, the product was washed with water without soaping and dried with warm air on a wire mesh. The dyed upper was fixed to a shoe mold, and the bottoming polyurethane composition was integrally molded by an injection molding method to prepare a shoe having a hard polyurethane foam sole.

The resulting shoe is entirely ivory in color,
The cross section of the hole and the cut edge of the cut piece are dyed well, and the surface around the hole, the surface around the cut edge of the cut piece, and the peripheral area of the seam are dyed slightly darker than other surface areas. The hue and the depth of the color were slightly changed, and the crease shape was a fine clean wrinkle of natural leather, and the product had a solid appearance.

Comparative Example 1 The leather-like sheet [I] of Example 1 was dyed with a Jigger dyeing machine under the dyeing conditions according to Example 1, washed with water without soaping, and fixed with a pin tenter drier. And dried. The obtained dyed product was dyed on the dyed surface of Example 1 in a slightly lighter and uniform dyed surface.

The dyed leather-like sheet was cut into small parts for shoe uppers in the same manner as in Example 1, and after patterning by punching, sewing was performed to obtain shoe uppers, and the cut edges of the cut pieces were cut. A similar dye solution was applied to the part by brush, but it had a different texture, and when it was applied up to the perforated part, it felt dirty and spoiled the appearance. The product made from this shoe upper had a light and fluffy feeling as a whole, and was not a distinctive product.

Comparative Example 2 The lightly dyed upper leather of Example 1 was soaped under normal conditions, washed with water, and dried on a wire mesh with warm air. The dyed upper was made into shoes as in Example 1. The shoe obtained is Example 1
The product is thinner than that of the product and has an ivory color in which subtle changes such as hue and color depth are not noticeable.

Example 2 Using the leather-like sheet [I] of Example 1, a belt having pin holes and decorative stitches was sewn and then dyed using a washer dyeing machine under the following conditions.

Dyeing Irgallan Red Brown RL 0.03% owf (Ciba-Geigy metal complex dye) Ilgallan Black GBL 0.01% owf (Ciba-Geigy metal complex dye) Bath ratio 1: 100 Bath Temperature 90 ℃ Time 15 minutes

After dyeing, it was washed with water without soaping and dried with warm air on a wire net. The beige-dyed belt was fitted with metal fittings to obtain a product. The obtained belt has a well-dyed cross section of the hole and the cut edge, and the surface around the hole, the surface around the cut edge of the piece, and the peripheral area of the seam are dyed slightly darker than other surface areas. The product was a product with a subdued change in the hue and depth of the light color toward the inside of the surface, and was a calm feeling.

[0024]

The product obtained by the method for dyeing a leather-like sheet according to the present invention has a surface to which the cut surface is dyed in the same color as the surface, and the surface portion following the cut surface, the surface portion around the holes or the stitches, and the surface. It is a light to medium-colored dyeing product, with the concave and convex parts of the embossed surface leaving a slight change in shades of light and shade.The surface tone is not monotonous, and the appearance is solid and calm. It is a dyed leather-like sheet product having a good appearance, high morphological stability, and good texture.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-57-154469 (JP, A) JP-A-54-41301 (JP, A) JP-A-55-152867 (JP, A) JP-B-41- 10358 (JP, B1) Japanese Patent Publication Sho-57-8232 (JP, B2)

Claims (1)

[Claims] 1. A base material comprising a fiber sheet and an elastic polymer or a polymer mainly composed of an elastic polymer, and a coating layer of the elastic polymer or a polymer mainly composed of the elastic polymer is provided on one surface of the base material. Obtained leather-like sheet, or a leather-like sheet having a fiber nap surface formed on one surface of the base material, cut into a desired product shape, or a semi-finished piece obtained by sewing and / or joining at least a part of the cut piece. Lightly dyed leather characterized by dyeing a product or products in a dyeing bath without tension, causing a change in color tone on the surface, washing with water without soaping, and drying to make the final product Sheet product manufacturing method.