JPH0528660Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to a surface material for touch switches used in home appliances such as VTRs and copying machines.

Conventional technology and its problems In many conventional surface materials for touch switches, the layers excluding the printed layer are made of polyurethane, and such surface materials have poor weather resistance and water resistance, and In addition to the fact that the touch switch part is constantly touched by hand, it tends to deteriorate due to friction and deterioration occurs over time, and the surface of the polyurethane layer on which the touch switch part is located tends to become dirty due to the manual contact. .

Therefore, the object of this invention is to provide a surface material for a touch switch which can eliminate the problems of the conventional ones.

Means for Solving the Problems In order to achieve the above object, this invention has a silicone rubber layer 4 on the surface of a transparent thermoplastic resin layer 3 on which a printed pattern such as letters is formed on the back side, as shown in FIG. The silicone rubber layer is laminated, and the surface of the silicone rubber layer is characterized by a matte texture with fine irregularities.

Effect By adopting the technical measures described above, deterioration of weather resistance, water resistance, and frictional deterioration due to contact with the touch switch part can be prevented.
In addition, the surface where the touch switch is located is made matte and prevents reflection of light, making the surface less likely to get dirty.

Example In Fig. 1, 1 is a surface material for a touch switch, which is laminated with a printed layer 2 on the surface of this printed layer 2, and has a printed pattern such as letters printed from the printed layer on the back surface, and is made of polyethylene terephthalate. , a transparent thermoplastic resin layer 3 with a thickness of about 10 to 100 μm made of polypropylene, polycarbonate, polyimide, polymethylpentene, polyethersulfone, etc., and a transparent thermoplastic resin layer 3 with a thickness of about 50 to 100 μm laminated on the surface of this thermoplastic resin layer 3. It consists of a silicone rubber layer 4 of about 500 μm. The surface of the silicone rubber layer 4 is formed into a matte texture with fine irregularities over a thickness of 0.2 to 5.0 μm. 5 shows the satin-like surface layer. As is already known, such a satin-like surface can be obtained by, for example, applying a plastic film having fine irregularities over the entire surface to the surface of the silicone rubber layer 4.
After pasting them together so that the uneven surfaces are in contact with each other,
It can be formed by peeling off the plastic film. In addition, a thin metallized film is also provided on required parts of the back surface of the printed layer 2, if necessary, making it possible to make the back surface of the printed pattern a metal color and to incorporate a conductive circuit. Touch switch part 2a with printed pattern
It has been carved to make it stand out from the rest of the body. Although it is difficult to perform the squeezing process using the silicone rubber layer 4 alone, the presence of the thermoplastic resin layer 3 makes it possible. Although not shown in the drawings, adhesive and release paper are provided on the back surface of the printed layer 2 in the form of a cutout portion corresponding to the printed pattern, rather than adhesive on the entire surface.

In the surface material 1 configured as described above,
Since the silicone rubber layer 4 is laminated on the thermoplastic resin layer 3, the overall body is stiff and strong.
It becomes difficult to break. Furthermore, the use of the silicone rubber layer 4 provides excellent weather resistance, water resistance, and chemical resistance, and since there is no deterioration due to contact friction, there is almost no deterioration over time. Moreover, since the silicone rubber layer 4 has more elasticity than conventional polyurethane layers, it provides a good feeling of touch to the surface over a long period of time.
The matte finish with fine irregularities makes the surface matte and non-reflective, making it possible to prevent the surface from becoming dirty as much as possible.

Effects of the invention This invention is as described above, in which a silicone rubber layer is laminated on the surface of a transparent thermoplastic resin layer with printed patterns such as letters formed on the back side, and the surface of this silicone rubber layer has fine irregularities. Because it has a matte finish, the use of the silicone rubber layer provides superior weather and water resistance compared to conventional surface materials made of polyurethane layers. There is almost no frictional deterioration, and no deterioration occurs over time. In addition, the surface of the silicone rubber layer has a matte finish with fine irregularities.
In addition to making the surface stain-resistant, since the silicone rubber layer is laminated with a thermoplastic resin layer in between, this resin layer can strengthen the stiffness of the silicone rubber layer alone. It has many excellent effects such as improved subsequent workability.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a surface material for a touch switch showing an embodiment of this invention. DESCRIPTION OF SYMBOLS 1... Surface material for touch switch, 2... Printing layer, 3... Thermoplastic resin layer, 4... Silicone rubber layer, 5... Satin-textured surface layer.

Claims (1)

[Claims for Utility Model Registration] 1. A silicone rubber layer 4 is laminated on the surface of a transparent thermoplastic resin layer 3 on which printed patterns such as letters are formed on the back side, and the surface of this silicone rubber layer has a satin finish with fine irregularities. A surface material for touch switches characterized by its shape. 2. The surface material for a touch switch according to claim 1, wherein the touch switch portion 2a with the printed pattern is squeezed to stand out from other parts. 3 A printed layer 2 formed by printing a printing pattern on the back surface of the thermoplastic resin layer 3 is provided, and a required portion of the back surface of this printed layer opposite to the thermoplastic resin layer 3 is made into a thin metalized film. A surface material for a touch switch according to Claim 1 of the Utility Model Registration Claim.