JPH0430048Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a synthetic sheet made of polyurethane resin, and more specifically, to a synthetic sheet having an embossed pattern consisting of a diffraction grating on the surface of the polyurethane resin layer. Due to its unique texture and diffraction pattern formed on its surface, polyurethane can be used in a wide range of applications, including synthetic resin bags, handbags, jackets, jackets, blousons, and other fashion materials, as well as sportswear materials. It is a synthetic sheet.

<Prior Art> Typical examples of conventionally known synthetic leathers or sheets include those made of vinyl chloride and those made of polyurethane.

Products made of vinyl chloride are made of vinyl chloride, which can be used in a variety of embossed patterns by taking advantage of its suitability for embossing, and can be used in a wide range of products, from colored resin to colorless and transparent bags and handbags, due to their relatively low cost. It's being used. However, one drawback of synthetic sheets made of vinyl chloride is that they have a hard texture.
Due to its lack of flexibility and unique feel, it has a strong image of being a low-grade product, and no matter how much processing or additions it undergoes, it is unlikely to be used as a material for luxury products.

On the other hand, those with a polyurethane surface have a good texture and are used for relatively high-grade applications, such as those with a natural backskin look and those with a urethane resin coating on the base material and a polished surface. It is also widely used. However, in the case of polyurethane resin synthetic sheets, embossing is rarely used, and there is a desire to develop processing techniques to further increase added value.

<Means for solving the problem> In view of these points, the present invention takes advantage of the texture of polyurethane resin and effectively adds a pattern made of diffraction gratings obtained by embossing the polyurethane layer. This provides a high value synthetic sheet.

The present invention will be explained in detail below.

Figure 1 is for explaining the present invention in an easy-to-understand manner. 1 shows a base fabric made of woven fabric, knitted fabric, non-woven fabric, etc., 2 shows a plastic film such as polyester film, and one side of 2 shows a base fabric made of woven fabric, knitted fabric, non-woven fabric, etc. has a metal vapor deposited layer 3 made of metal,
Furthermore, a polyurethane resin layer 4 is formed on the metal vapor deposited layer 3.
Laminate. By providing the diffraction pattern 5 formed by a diffraction grating on the surface of this polyurethane resin layer 4, the flexible texture of the polyurethane resin and the replica-like diffraction grating pattern embossed on the metal vapor deposited layer and the surface make it possible to It is possible to obtain a polyurethane synthetic sheet with a high design quality that has not been previously obtained.

That is, according to the present invention, the metal vapor deposition layer 3 provided on one side of the plastic film 2 such as a polyester film serves as a reflective layer for light entering from the polyurethane resin layer 4 side, and the surface of the polyurethane resin layer 4 has a diffraction layer. Because the lattice pattern is embossed, light coming from a certain direction produces a clever spectrum of reflected light and diffracted light, resulting in a surface with extremely high design effects. In addition, since the main resin component is polyurethane resin, it has a soft texture and a high-class feel, and can be used as a variety of decorative materials.

Furthermore, by adopting the configuration of the present invention, the metal vapor deposited layer 3 has a property that it is relatively easy to break off from the surface of the vapor deposit when bent, but it is protected by the polyurethane resin layer 4 and the polyester film 2 from above and below, respectively. Therefore, even when the flexible urethane resin is bent, it will not partially separate.

The base fabric 1 described in the present invention can be arbitrarily selected depending on the application, such as various woven fabrics, knitted fabrics, and non-woven fabrics, and the type thereof is not particularly limited, from natural fibers to synthetic fibers. It goes without saying that a film-like material may be used instead of a cloth depending on the purpose.

As the metal vapor deposition layer 3 described in the present invention, any metal that can be vapor-deposited can be used, but aluminum is the most suitable in terms of cost and versatility.
A thickness of about 〓~600〓 is good.

As the plastic film 2 mentioned in the present invention, almost all kinds of plastic films such as polyethylene film, polypropylene film, polyamide film, and polyester film can be used, but from the viewpoint of dimensional stability, versatility, texture, etc. A polyester film with a thickness of around 10 μm is suitable.

The polyurethane resin layer mentioned in the present invention mainly refers to a thermoplastic polyurethane elastomer, and is laminated on the surface of a vapor-deposited polyester film by a melt coating method or an extrusion coating method. The appropriate thickness of the polyurethane resin layer is preferably about 20 to 100 μm.

The diffraction pattern described in the present invention is obtained by hot pressing (embossing) the surface of the polyurethane resin layer using a relief stamper having a diffraction grating. Specifically, 5 to 1 mm
By using a relief stamper having a diffraction grating consisting of 1500 periodically spaced lines, a diffraction pattern with high design effects can be obtained.

An example of a relief stamper is a hologram stamper.

Hereinafter, the present invention will be explained using examples in order to make it easier to understand.

<Example> (1) An aluminum vapor deposition layer was applied to a thickness of 500 Å on the surface of a 12 μm thick polyester film.

(2) Next, apply the following polyurethane resin to the obtained vapor-deposited surface using an extrusion coating method using an adhesive.
The layers were laminated to a thickness of 80 μm.

・Polyurethane resin: Elastolan
E385PNAT (polyether-based thermoplastic polyurethane resin manufactured by Nippon Elastran Co., Ltd.) - Adhesive (coated on the aluminum vapor-deposited surface by gravure coating method) Adcoat 980 A...100 parts Adcoat 980 B...10 parts (2 manufactured by Toyo Morton Co., Ltd.) (liquid-reactive urethane adhesive) (3) Next, a relief stamper with 800 diffraction gratings per millimeter was used to stamp 50 kg on the urethane resin surface obtained in (2) at a temperature of 100°C. After holding the stamper at a pressure of /cm ² for 20 seconds, the stamper was cooled to 20° C. and the pressure was released to obtain a laminate having a diffraction pattern on the surface.

(4) Furthermore, by adhering the laminate obtained in (3) to the polyester film surface using the adhesive used in (2) on 100% cotton plain weave sheeting,
A polyurethane synthetic sheet having the diffraction pattern shown in FIG. 1 was obtained.

(Effect of the invention) By using the polyurethane synthetic sheet with the diffraction pattern obtained in this way as a material for fashion bags and a decorative material for casual wear, a synthetic sheet with an unprecedented high design quality can be obtained. It was done.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and Fig. 1 is an explanatory diagram showing a cross section of the polyurethane synthetic sheet. 1: base fabric, 2: plastic film, 3: metal deposition layer, 4: polyurethane resin layer, 5: diffraction pattern.

Claims (1)

[Claims for Utility Model Registration] 1. A plastic film 2 having a metal vapor deposited layer 3 is laminated on one side of a base fabric 1, and a polyurethane resin layer 4 having a diffraction pattern 5 is further provided thereon. Polyurethane synthetic sheet. 2 Utility model registration 1 characterized in that plastic film 2 is a polyester film
The polyurethane synthetic sheet described in section. 3. The polyurethane synthetic sheet as described in Items 1 and 2 of the utility model registration, characterized in that the metal vapor deposited layer 3 is an aluminum vapor deposited layer. 4 The diffraction pattern 5 is at least 5 per millimeter.
The polyurethane synthetic sheet according to claims 1, 2 and 3, characterized in that it is formed by a diffraction grating consisting of ~1500 periodic spacings.