JPH0635171B2 - Sheet body and its molding method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a synthetic resin sheet body and a method for molding the sheet body. More specifically, the feel and texture of the outer surface of the sheet body are further described. The purpose of the present invention is to obtain a sheet body whose appearance is similar to the feel and texture of a skin surface and which is similar to the appearance.

[Conventional technology]

Sheets made of synthetic resin such as polyethylene resin have excellent flexibility, content resistance, chemical resistance, tensile strength, etc., and can be manufactured inexpensively and easily and have excellent processability. For these reasons, it is used as a manufacturing material for various containers such as tube containers.

One of the major features of this synthetic resin sheet body is that its surface is extremely smooth, which makes it difficult to stain, and even if dirt is attached, it can be easily wiped off, and it has a glossy appearance. It was something I could get.

[Problems to be solved by the invention]

As described above, since the conventional synthetic resin sheet body has one of the features that the outer surface is extremely smooth, it has a glossy, hard, and cold feeling. No such soft and warm appearance could be obtained.

Of course, there has been a sheet body that has been color-decorated and surface-treated in order to obtain softness and warmth in the appearance, but the touch feeling when actually touched with a fingertip is that there is no softness and warmth at all. There was a great dissatisfaction with the texture itself.

[Means and Actions for Solving Problems]

The present invention was devised to solve the problems and dissatisfactions in the above-mentioned conventional examples, and is configured to utilize the softness and warmth of the foamed resin layer for imitating the texture and appearance of the skin surface. Is.

Hereinafter, the present invention will be described with reference to the drawings showing an embodiment of the present invention.

The sheet body 1 according to the present invention is a laminated sheet body molded from a synthetic resin material such as polyethylene resin, and the outer surface of the inner layer 2 is provided with unevenness simulating wrinkles and pores on the outer surface. It has a structure in which the outer layer 3 having a low foam structure of micro voids is laminated and covered.

The inner layer 2 is made of a synthetic resin material, and its inner and outer surfaces are smooth.

As described above, since the outer surface of the sheet body 1 according to the present invention is formed of the outer layer 3 having the low void structure of micro voids, the outer surface of the sheet body 1 naturally has a soft and warm texture. It's very spectacular.

Further, since the outer surface of the outer layer 3 is provided with unevenness imitating wrinkles and pores on the skin surface, the outer surface of the sheet body 1 has an appearance very similar to the skin surface.

Therefore, the appearance of the sheet 1 according to the present invention and the texture of the outer surface portion are very similar to the skin.

Various methods are conceivable as the method for molding the above-described sheet body 1 according to the present invention. Next, a molding method which seems to be most suitable for producing the sheet body 1 according to the present invention will be described.

An inner layer 2 formed of a molten synthetic resin material and an outer layer 3 formed of a synthetic resin material having a microvoid with a low foaming rate are co-extruded in a laminated form to form a sheet element body. The sheet body 1 is formed by forming an uneven pattern imitating wrinkles and pores on the skin by embossing on the outer surface of the outer layer 3.

That is, the synthetic resin material molded into the inner layer 2 and the outer layer 3
The synthetic resin material molded in (1) is heated and melted in a single extruder. At this time, only the synthetic resin material molded in the outer layer 3 is subjected to foaming processing A with low foaming of micro voids.

The synthetic resin material for molding the outer layer 3 and the synthetic resin material for molding the inner layer 2 which have been subjected to the foaming process A are extruded B in the form of co-extrusion to form a laminated body and become a sheet body. Is extruded.

After the sheet body is extruded, the outer surface of the outer layer 3 of the sheet body is embossed to form an uneven pattern imitating wrinkles and pores on the skin, and thus the sheet body 1 according to the present invention is formed. Is completed.

By the way, it goes without saying that the inner layer 2 and the outer layer 3 are strongly bonded to each other, and in order to achieve the mutual adhesion of the inner layer 2 and the outer layer 3 more reliably and strongly, the inner layer 2 is molded. It is preferable that the synthetic resin material used for forming the outer layer 3 and the synthetic resin material used for molding the outer layer 3 are sufficiently compatible with each other.

〔Example〕

The embodiment shown in FIG. 3 shows a case where the sheet body 1 according to the present invention is formed into a tube shape, and it goes without saying that the outer surface of the tube body which is the sheet body 1 is formed by the outer layer 3. Yes.

In the case of the embodiment shown in FIG. 3, the tube-shaped sheet body 1 was directly extruded into a tube shape from an extrusion molding machine. First, a tube-shaped sheet body was formed by extrusion processing B. After that, cut it to a certain size,
A color pattern similar to the appearance of the skin on the outer surface of the cut sheet body is printed by the printing process C, and the embossing D is applied to the outer surface of the printed sheet body to obtain the skin surface. The sheet body 1 is completed by forming an uneven pattern imitating wrinkles, pores, and the like.

The shape of the color pattern similar to the appearance of the leather on the surface of the sheet body 1 may be formed on the outer surface of the sheet body by printing as described above, but the shape is not necessarily limited to printing. At the time of molding the outer layer 3, it is possible to use a means of previously putting and coloring a face which makes the appearance color of the skin appear in a synthetic resin material for molding the outer layer 3.

However, as is well known, most of the actual leather is colored and commercialized, and it is rare that the actual color of the leather is left as it is, so the outside of the sheet 1 The color pattern on the surface does not necessarily have to resemble the original appearance of the leather.

〔The invention's effect〕

As described above, the sheet body 1 according to the present invention has the outer surface formed with the outer layer 3 having a microfoam low-foam structure, and the outer surface is provided with an uneven pattern imitating wrinkles and pores on the skin surface. So, in terms of appearance, texture and feel,
It has the same softness and temperature as leather.

Therefore, the sheet body 1 of the present invention can be manufactured as a product having an appearance and texture rich in softness and warmth, which cannot be obtained by the conventional synthetic resin sheet body.

Further, in the method for forming a sheet body according to the present invention, the inner layer 2 and the outer layer 3 can be integrally formed by utilizing coextrusion, whereby the inner layer 2 having greatly different physical properties.
This makes it possible to easily and firmly achieve the integral joining between the outer layer 3 and the outer layer 3.

Further, since the uneven pattern imitating wrinkles and pores on the skin is formed by embossing, the uneven pattern can be easily, accurately and surely formed on the surface of the soft outer layer 3.

As is clear from the above description, the sheet body according to the present invention is capable of exhibiting a texture and appearance extremely similar to the texture and appearance of genuine leather. It is possible to obtain a product made of synthetic resin sheet with a completely new image with softness and warmth that cannot be obtained with other products, and since it is soft to the touch, it is possible to provide a product that feels good when used. In addition, the molding method according to the present invention exhibits many excellent effects such that the above-mentioned sheet body can be molded easily, smoothly and surely.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view showing the basic structure of a sheet body according to the present invention. FIG. 2 is a block diagram showing an example of one step of the molding method according to the present invention. FIG. 3 is an overall perspective view showing an embodiment of the sheet body according to the present invention. DESCRIPTION OF SYMBOLS 1; Sheet body, 2; Inner layer, 3; Outer layer, A; Foaming,
B: Extrusion processing, C: Printing processing, D: Embossing processing.

Claims (2)

[Claims] 1. A laminated sheet body formed of a synthetic resin material.
(1) The outer layer (3), which has a microfoam low-foaming structure with the outer surface of the inner layer (2) provided with irregularities simulating wrinkles and pores on the outer surface, is laminated and positioned. A sheet body consisting of. 2. An inner layer (2) formed of a synthetic resin material.
And an outer layer (3) formed of a synthetic resin material having low foaming of micro voids and a layered coextruded to form a sheet body, and the outer surface of the outer layer (3) of the sheet body, A method for forming a sheet body, which comprises embossing to form an uneven pattern imitating wrinkles and pores on the skin.