JPS6023356Y2 - Composite release paper for synthetic leather production that gives perspective patterns - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a composite release paper for producing synthetic leather (including synthetic leather).

Conventionally, as a method for manufacturing synthetic leather, a method using release paper is known.

According to this manufacturing method using release paper, first, a synthetic resin liquid with film-forming ability is applied to the surface of the release paper to a uniform thickness and dried to form a synthetic leather skin. The leather base fabric is laminated and integrated using an adhesive.

Next, the release paper is peeled off from the epidermis, and a leather-like pattern is printed on the surface of the epidermis using a printing method such as direct printing or transfer printing, and the printed area is prevented from peeling and glossy. For the purpose of application, a surface treatment is performed using a transparent synthetic resin liquid, and the product is made into a product.

However, in such conventional methods, it is necessary to apply a printing means to impart a leather pattern to the surface of the skin, which significantly complicates the equipment and operation aspects such as installing a printing device, and the resulting product However, it has been impossible to obtain an appearance for leather with high design value, which has a flat surface and has shading to give a sense of perspective and three-dimensionality.

Also, in this case, by using embossed release paper, a skin with a grain pattern can be obtained, but this skin has a uniform thickness, so there is no shading;
In this case as well, no sense of perspective or three-dimensionality can be obtained, and
There is also a problem in that the grain pattern that has been painstakingly formed tends to be erased due to the drying heat during the surface treatment of the printed area.

The purpose of the present invention is to provide a composite release paper for the production of synthetic leather that can produce a leather-like appearance with high design value, which has shading and can give a sense of perspective and three-dimensionality, without using any printing means. The present invention will be explained below based on the accompanying drawings.

FIG. 1 shows an embodiment of the present invention, in which a release paper main body 1 has a release coating 4 on the surface, and a paper 3 with an uneven pattern 2 on the back surface.
is glued using synthetic resin thread adhesive (not shown),
It constitutes a composite release paper.

Examples of the paper 3 with an uneven pattern include paper with uneven thickness and uneven papermaking, embossed paper, and other paper with an irregular or fixed uneven pattern made of bulb lumps with different degrees of beating, such as clouds. Paper with flowing patterns can be used to advantage.

Further, as the release paper main body 1, a known release paper, such as a known release paper in which a release layer made of silicone resin is formed on the surface of paper, can be advantageously used.

The release paper of the present invention is transported or stored in a rolled state, similar to conventional products.

Figure 2 shows a usage situation of the release paper A of the present invention shown in Figure 1, in which the release paper A has an upper fixed roll (made of metal) a and a lower rotating roll (made of rubber) b as usual. The synthetic resin liquid C (colored in a predetermined color with a colorant such as a pigment or dye) is supplied to the surface of the synthetic resin liquid C (colored in a predetermined color with a coloring agent such as a pigment or dye).

At this time, since an uneven pattern 2 based on the attached paper 3 is formed on the back side of the release paper A, the uneven pattern 2 on the back side is pushed upward by the lower roll b when passing between rolls at and b. As a result, on the surface side of the release paper A, an uneven pattern 2' based on the pushing up of this uneven pattern 2 is gradually revealed.

Therefore, the surface of the release paper A is supplied with the synthetic resin liquid C while the uneven pattern 2' appears sequentially, and the synthetic resin liquid C is applied thickly to the concave parts and thinly to the convex parts. It will be worn.

The synthetic leather skin 5 formed in this way has an uneven pattern 6 along the uneven pattern 2' on the side of the release paper A, and hereinafter, a base fabric of synthetic leather is applied to the surface of the synthetic leather 5 in the usual manner. 7 are laminated and integrated using an adhesive, and then the release paper A is peeled off to obtain synthetic leather.

In the obtained synthetic leather, the thickness of the skin 5 is uneven, with the concave portions of the uneven pattern 6 being thin and the convex portions being thick. This creates a sense of perspective and three-dimensionality, resulting in a leather-like appearance with high design value.

This leather-like appearance can be further improved by embossing the release paper main body 1 in advance and combining this embossed pattern with the leather-like appearance.

Figures 3 and 5 show how conventional release paper is used. As shown in Figure 3, when a release paper without embossing is used, the resulting skin has a smooth surface. The skin is of uniform thickness and a leather-like appearance cannot be obtained without the application of printing means.

Furthermore, as shown in Figure 4, even when using embossed release paper, the unevenness is formed on both the front and back sides due to the embossing, so the unevenness overlaps with each other when passing between rolls. Since the synthetic resin liquid is supplied to the skin in a substantially flat state by absorbing each other, although the resulting skin has a wrinkled pattern, the overall thickness is uniform and there is no unevenness in the thickness. It is impossible to obtain a shading pattern, or even a perspective pattern.

According to the composite release paper of the present invention, a three-dimensional leather-like uneven pattern that has shading and can give a sense of perspective can be imparted to the surface of the skin without using any printing means, and the printing process and even the printed part can be Since no surface treatment process is required, the production of this type of synthetic leather can be achieved extremely simply in terms of equipment and operation, and the resulting product has a three-dimensional leather appearance with a sense of depth and perspective. It has the advantage of being able to provide high quality products with great taste.

Furthermore, the release paper of the present invention has a composite structure of a release paper main body 1 having a release film 4 on its surface and a paper 3 with an uneven pattern 2 attached to the back side of the main body 1, and has an extremely simple structure. In addition, since the back side of the release paper is particularly uneven, it can be used without any adverse effect on the performance of the release film 4 on the surface.
Such an uneven pattern 2 can be formed on a release paper, and a composite release paper with good quality and performance can be provided at a low cost.

[Brief explanation of the drawing]

Fig. 1 is an enlarged vertical sectional view showing an embodiment of the present invention, Fig. 2 is an enlarged longitudinal sectional view showing one usage situation of the invention shown in Fig. 1, and Figs. 3 and 4 are FIG. 2 is an enlarged vertical cross-sectional view showing one usage situation of a conventional release paper. In the figure, 1 is the main body of the release paper, 2 is the uneven pattern, 6 is the uneven patterned paper, 4 is the release coating, 5 is the skin, 6 is the uneven pattern on the skin, and 7 is the base fabric.

Claims (1)

[Scope of utility model registration request] 1. A composite release paper for producing synthetic leather that imparts a perspective pattern, characterized in that a paper having an uneven pattern is adhered to the back side of a release paper body having a release film on the surface.