JPS622832B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a decorative button, and an object of the present invention is to manufacture a button base material having a predetermined shape, and the inner surface of the edge of a thermoplastic resin skin covering the surface of the button base material and the back surface of the button base material. A new and extremely new and extremely new method, in which the inner surface of the edge of the thermoplastic resin lining to be coated is in contact with and welded, and the welded part is located on the back surface of the button base material, and the periphery thereof is covered with the outer skin. To provide a method for manufacturing decorative buttons with high decorative effect.The first gist of the present invention is to cover the surface of a button base material of a predetermined shape with a skin made of thermoplastic resin, and to The back surface of the button base material is covered with a back skin made of the same type of thermoplastic resin as the skin material and having greater heat shrinkability than the outer skin, and both the front and back skins are attached to the periphery of the button base material. The method for producing a decorative button is characterized in that after welding along the button, the back skin is heat-shrinked by heat treatment, and the welded portions of the front and back skins are transferred to the back surface of the button base material, and A second aspect of the present invention is that in the manufacturing method, the surface of the button base material is covered with the skin with an elastic sheet interposed therebetween.

In the present invention, the button base material refers to a base material of a predetermined shape made of synthetic resin, wood, metal, etc. that can be directly attached to a decorated product with or without an attachment thread. In addition, the skin is a woven fabric, knitted fabric, sheet, film, etc. made of thermoplastic resin such as polyolefin, polyester, polyamide, or polyvinyl chloride, and its surface is subjected to calendering, embossing, or printing. Decorative patterns are added or colored. Furthermore, the back skin is a sheet, film, etc. made of the same type of thermoplastic resin as the outer skin, and the heat history conditions and/or stretching conditions are different from the outer skin during the manufacturing process. It is formed in such a way that it has greater heat-shrinkability than the above-mentioned skin. Further, the elastic sheet in the second aspect of the present invention includes a rubber sheet,
These are synthetic resin foam sheets, etc.

The drawings show an example of a decorative button obtained by the manufacturing method of the present invention and a process for manufacturing the decorative button. This decorative button 10 is attached to a car seat 20 as shown in FIGS. 1 to 4.
The button base material 11 is made of nylon, the sheet-like skin 12 is made of polyvinyl chloride, and the skin 12 is made of polyvinyl chloride and has greater heat shrinkability than the skin 12. A back skin 13 having a button base material 11 and an outer skin 1
2, and a foamed elastic sheet 14 made of polyurethane interposed between the two.

The button base material 11 consists of a flat substrate 111 and two legs 112 integrally formed therewith, and is covered with a skin 12 with an elastic sheet 14 attached to the surface of the substrate 111. ing. The outer skin 12 completely covers the surface of the elastic sheet 14 and reaches the back surface of the substrate 111 via the periphery of the substrate 111, and the inner surface of the edge of the outer skin 12
The legs 112 are superimposed and welded to the inner surface of the edge of the back skin 13 that is in contact with the back surface of the substrate 111. Decorative button 1 configured in this way
0 is attached to a retainer 30 made of nylon and fixed to the back surface of the seat cover 21 constituting the back portion 20a of the seat 20. As shown in FIG. 4, the retainer 30 consists of a flat plate 31 and a flat plate leg 32 integrally formed perpendicular to the flat plate 31. One end of the leg 32 is attached to a C ring 33.
The mounting portion 31 is fixed to the seat spring 22 via the seat pad 23, and its mounting portion 31 is in contact with the back surface of the seat cover 21 through the space between the seat pads 23. Furthermore, the attachment portion 31 of the retainer 30 is provided with two insertion holes 311 corresponding to the leg portions 112 of the button base material 11, and by pressing the decorative button 10 from the outside of the seat cover 21, The leg portion 112 of the button base material 11 is fitted into the insertion hole 311, and is prevented from coming off by the large diameter portion 112a of the leg portion 112.
The decorative button 10 attached to the back 20a of the sheet 20 in this way functions as a decorative button for the sheet 20, as shown in FIG.
Peripheral welded part 1 of both front and back skins 12 and 13 covering 1
01 is located on the back surface of the button base material 11 and cannot be detected from the outside, so that the aesthetic appearance is not impaired by the peripheral welded portion. As a result, the decorative button 10 exhibits an extremely high decorative effect.

As described above, the decorative button 10 which is novel and has a high decorative effect is suitably manufactured by the process shown in FIG. 5, for example. That is, first, an elastic sheet 14 made of foamed polyurethane whose back surface is coated with an adhesive is attached to the surface of the substrate 111 of the button base material 11 made of nylon (see A in the same figure), and the surface is polychlorinated. It is covered with a sheet-like outer skin 12 made of vinyl, and its back side is covered with a film-like back skin 13 made of polyvinyl chloride, which has greater heat shrinkability than the outer skin 12 (see figure B). Then,
The contact parts of these front and back skins 12 and 13 are high-frequency welded along the periphery of the button base material 11, and the front and back skins 12 and 13 are
2 and 13 are cut along the outer periphery of the welded portion 101 (see C in the same figure). Finally, this is heat-treated for 7 to 8 minutes at an optimal temperature of 100 to 150°C at which the lining 13 is thermally shrunk. As a result, the inner skin 13 undergoes heat contraction almost uniformly, and the outer skin 12 is caused by the heat shrinkage force generated at this time.
is pulled almost evenly toward the inner surface of the button base material 11. As a result, the welded portion 101 of the front and back skins 12 and 13 located along the periphery of the button base material 11 moves to the back surface of the button base material 11 (see D in the figure). By the way, in this manufacturing example, the button base material 11
Since the elastic sheet 14 interposed between the substrate 111 and the skin 12 can be deformed by pressure, the elastic sheet 14 can be deformed by pressure during heat treatment without considering the tensile allowance for the skin 12 in advance. The welded portion 101 of the front and back skins 12 and 13 is easily pulled by the button base material 11, and the welded portion 101 of the front and back skins 12 and 13 smoothly transfers to the back surface of the button base material 11. Also,
At this time, since the skin 12 is in close contact with the elastic sheet 14 along almost the entire surface thereof, the head of the decorative button 10 is formed very beautifully. In addition, if the polyvinyl chloride film used as the backing 13 has a directionality in heat shrinkage, a plurality of such films are used by stacking them so that their heat shrinkage directions are different from each other. It is necessary to eliminate the directionality of heat shrinkage in the skin 13 itself.

As described above, according to this manufacturing example, by using a film that is made of the same type of thermoplastic resin as the material of the outer skin 12 as the back skin 13 and has greater heat shrinkability than the outer skin 12, a new material can be produced. Therefore, it is possible to easily manufacture a decorative button 10 having an extremely high decorative effect.

Note that this manufacturing example shows an optimal representative example of the present invention, and the present invention can be implemented with various modifications to this manufacturing example. That is, the epidermis 12
Leave an allowance for the tension in advance and attach both the front and back skins 1.
2 and 13, it is not necessary to interpose the elastic sheet 14 between the substrate 111 and the skin 12 of the button base material 11. Further, as described at the beginning, for both the front and back skins 12 and 13, a sheet or film made of an appropriate thermoplastic resin such as polyolefin, polyester, or polyamide is used. In this case, it is necessary to use sheets or films made of the same type of thermoplastic resin for both the front and back skins 12 and 13, taking into consideration the compatibility during welding, and also to consider the heat treatment conditions. It is also necessary to adopt optimal heat shrinkage conditions for the inner skin 13 in relation to the outer skin 12. Note that for the skin 12, woven fabrics, knitted fabrics, etc. made of the thermoplastic resin are also suitably employed.

In summary, in the present invention, the back skin that covers the back surface of the button base material is made of the same type of thermoplastic resin as the skin that covers the front surface of the button base material, and has greater heat shrinkability than the skin. By employing a sheet, film, etc. having
A novel decorative button whose periphery is covered with the skin described above and which has an extremely high decorative effect can be manufactured by a simple method.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an automobile seat equipped with a decorative button manufactured according to the present invention, FIG. 2 is an enlarged perspective view of the decorative button of FIG. 1, and FIG.
Figure 4 is an enlarged cross-sectional view taken along the - line in Figure 1. Figure 4 is an enlarged cross-sectional view taken along the - line in Figure 1.
The figure is a manufacturing process diagram of the decorative button shown in FIG. 1. Explanation of symbols, 10... Decorative buttons, 11...
Button base material, 12...Outer skin, 13...Back skin, 14
...Elastic sheet, 20...Car seat, 30
...retainer.

Claims (1)

[Scope of Claims] 1. The front surface of a button base material having a predetermined shape is covered with a skin made of a thermoplastic resin, and the back surface of the button base material is made of the same kind of thermoplastic resin as the skin material, and the The front and back skins are covered with a lining that has greater heat shrinkability than the outer skin, and the front and back skins are welded along the periphery of the button base material, and then heat-treated to heat-shrink the lining. A method for manufacturing a decorative button, characterized in that the welded portions of both skins are transferred to the back side of the button base material. 2. The front surface of a button base material of a predetermined shape is covered with an outer skin made of a thermoplastic resin with an elastic sheet interposed therebetween, and the back surface of the button base material is made of the same type of thermoplastic resin as the outer skin, and the Covered with a lining that has greater heat shrinkage than the outer skin,
After welding the front and back skins along the periphery of the button base material, heat treatment is performed to heat-shrink the back skin,
A method for manufacturing a decorative button, characterized in that the welded portions of the front and back skins are transferred to the back surface of the button base material.