JPS6032157Y2 - Sheet for forming suede-like fake leather - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sheet that can easily form suede-like leather having excellent appearance, feel, and texture.

Conventionally, as a method for manufacturing suede-like leather, there is a method described in Japanese Patent Application Laid-open Nos. 52-12904 and 52-12905.

These methods utilize the fact that when a foaming agent layer formed on a carrier with air bubbles is peeled off within the layer, the unevenness of the surface of the foaming agent layer that is peeled off closely resembles suede leather. be.

Therefore, according to this method, a suede-like surface is formed,
A simulated leather with excellent appearance and texture can be obtained.

However, since a polymer having bubbles is used as the carrier, the following drawbacks arise.

That is, the formation process is a complicated process that involves mechanically introducing air bubbles or applying a polymer solution to a sheet and immersing it in a coagulation bath, which is expensive and time-consuming.

In order to improve this drawback, a method using a blowing agent may be considered instead of the above-mentioned method for forming cells in the carrier.

However, in this case, the following problems arise.

That is, if the carrier and the foaming agent layer are made of the same resin, they become one body.

Therefore, if the layer is peeled off, the layer including the carrier will be peeled off, resulting in the formation of a rough, uneven surface, making it impossible to obtain a suede-like appearance.

Furthermore, if a layer made of a resin different from the foaming agent layer is provided as a carrier, the two layers will peel off at the interface, resulting in a flat surface and no suede-like appearance.

The inventor of the present invention attempted to solve the above-mentioned problems, and as a result of various considerations, he completed the present invention.

That is, in the present invention, a first coat layer 2 made of a foaming agent, an extender pigment, and a resin is provided on a base sheet 1, and a second coat layer 3 made of a foaming agent and a resin of the same quality as the resin is provided thereon. This is a sheet for forming suede-like faux leather.

The present invention will be explained in more detail below.

For the base sheet 1, a film made of polyvinyl chloride, polyethylene, polypropylene, or the like, cellophane paper, nylon paper, processed paper coated with polyvinyl chloride, or the like is used.

A first coat layer 2 made of a foaming agent, an extender pigment, and a resin is provided on a base sheet 1.

The blowing agents used are azodicarbomide, P-P-oxybis(benzenesulfonyl)hydrazide, azobisisobutylnitrile, N-N'-dimethyl-N.N'
- dinitrosoterephthalamide, diazominobenzene,
Examples include phthalazirad.

Further, as extender pigments, kaolin, magnesium carbonate, calcium carbonate, silica, titanium oxide, etc. are used.

To form the first coat layer 2, a resin such as polyvinyl chloride or a copolymer thereof containing the above-mentioned foaming agent and extender pigment is applied onto the base sheet 1 by a roll coating method or a gravure coating method.

The thickness of the first coat layer 2 is not specified, but is 2 μm to 10 μm.
The thickness is preferably about μm.

Further, although the amounts of the blowing agent and extender pigment are not specified, they are preferably 5% to 15% and 5% to 20%, respectively, based on the resin.

A second coat layer 3 is formed on the first coat layer 2 .

The second coat layer 3 is formed by applying a resin that is the same as the resin used for the first coat layer 2 and contains a foaming agent.

Forming methods include roll coating, gravure coating, etc. The thickness of the layer is preferably 100 μm to 57FE+71.

Although the content of the foaming agent is not specified, it is preferably 2% to 10% in consideration of the unevenness of the suede-like surface that will be formed later.

In addition, when forming a suede-like surface partially on the sheet having the above structure, a foaming suppressant may be partially applied on the base sheet.

In this case, since the area coated with the foaming inhibitor does not form a fake leather surface, if the pattern 4 is applied to this area, the pattern will be obtained as a so-called punched pattern (see FIG. 2).

Furthermore, by partially applying the foaming promoter onto the base sheet 1, it is possible to specifically foam the portion.

Foaming inhibitors that can be used include maleic acid, phthalic acid, adipic acid, salicylic acid, trimellitic acid, and terephthaloyl chloride, and foaming accelerators that can be used include zinc oxide, zinc nitrate, lead stearate, and phthalic acid. These include lead, cadmium laurate, urea, ethanolamine, and borax.

Furthermore, by incorporating a coloring agent into the first coat layer 2 and the second coat layer 3, fake leather of any color can be obtained.

The use of the suede-like simulated leather forming sheet according to the present invention described above is as follows.

That is, first, an adhesive 5 such as acrylic resin, polyamide, modified polyolefin, vinyl chloride, vinyl acetate copolymer, etc. is applied to the second coat layer 3 side of the sheet, and then a base material such as cloth, paper, nonwoven fabric, etc. Place it on the material 6 and adhere it.

Thereafter, the first coat layer 2 and the second coat layer 3 are heated to a temperature at which they foam.

After the two layers are foamed by heating, the base sheet 1 is peeled off.

As a result of the peeling, the first coat layer 2 is peeled off within the layer, and a peeled surface with uniform and fine irregularities is obtained.

This is because the first coat layer 2 contains extender pigments, and this layer has weak film-forming ability and is brittle. Therefore, when the base sheet 1 is peeled off, uniform interlayer peeling occurs without resistance, resulting in finely uneven suede leather. This results in a release surface that closely resembles that of .

The sheet according to the invention may also be first heated to foam the two layers and then adhered to the base material 6, after which the base sheet is peeled off.

Since the present invention is a sheet for forming suede-like leather as described above, by applying it to cloth, paper, nonwoven fabric, etc., it is possible to easily form suede-like leather with excellent appearance, feel, and texture.

[Brief explanation of the drawing]

FIG. 1 shows a partially enlarged sectional view of a sheet for forming suede-like leather according to the present invention. FIG. 2 shows a partially enlarged sectional view of a sheet according to one embodiment of the present invention after heating, and FIG. 3 shows a state in which a sheet according to another embodiment of the present invention is used. In the figure, 1... base sheet, 2... first
Coat layer, 3... Second coat layer, 4...
・Design formed using a foaming inhibitor, 5...Adhesive, 6...Base material.

Claims (1)

[Claims for Utility Model Registration] 1. A first coat layer 2 made of a foaming agent, an extender pigment, and a resin is provided on a base sheet 1, and a second coat layer 3 made of a foaming agent and a resin of the same quality as the resin is provided thereon. A suede-like imitation leather forming sheet characterized by being provided with. 2. A sheet for forming suede-like leather according to claim 1, wherein the base sheet has a pattern 4 formed using a foaming inhibitor and/or a foaming accelerator. 3. A sheet for forming suede-like simulated leather according to claim 1, wherein the first coat layer and the second coat layer contain a coloring agent.