JPH0157667B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-frequency weldable vehicle interior fabric used for vehicle seats, door trims, sun visors, etc.

BACKGROUND OF THE INVENTION Examples of conventional vehicle interior fabrics include those shown in FIG. That is, there is a fabric 1 used for interior decoration whose back surface is coated with a back coating material 3, which is mainly a thermoplastic liquid resin (FIG. 1). There is also a fabric having the above-mentioned structure with a polyvinyl chloride sheet 4 further adhered to the back side using an adhesive 2. (Figure 2).

Conventional vehicle interior fabrics are made by sandwiching an elastic material such as urethane between the fabric and a non-woven fabric or a metal band and welding it using high-frequency heating to fix the fabric, non-woven fabric, or metal band. There is. For example, door trims are used by sandwiching an elastic material such as urethane between a hardboard and a vehicle fabric and welding the material using high-frequency heating to fix the fabric and hardboard. However, interior materials using such fabrics are heat-resistant (MVSS302) from the standpoint of respecting human life.
It is necessary to pass the following criteria, and flame-retardant back coating materials are generally used. Since this back coating uses polyester with a high melting point that does not easily generate heat, it was difficult to fix it even when processed by high frequency welding because the melting points of other members were relatively low.

On the other hand, in recent years there has been a growing demand for interior materials with improved light resistance and texture (softness, firmness).
However, since this polyester thread also has a high melting point, it has been difficult to fix it to other members.

In addition, in recent years, there has been a demand for interior materials with patterns and patterns on fabrics, and there is a tendency to use fabrics with uneven surfaces. It has been difficult to fix such fabrics to other members because the pressure applied during melt bonding during high-frequency welding is not uniform for fabrics with non-uniform skin.

This invention was made by focusing on such conventional problems, and it is possible to improve the fabric back side or fabric lining of fabrics treated with flame retardant treatment, fabrics using polyester threads, fabrics with large differences in thickness and density, etc. Contains vinyl with good high-frequency welding properties on the resin-treated surface of
The purpose is to solve the above problems by melt-bonding an ethylene vinyl acetate copolymer film that has a low melting point, good texture (softness, firmness), and rubber elasticity. That is.

The present invention will be explained below based on the drawings.

FIG. 3 and FIG. 4 are diagrams showing an embodiment of the present invention.

First, to explain the structure, Fig. 3 shows a cross section of the EVA-covered fabric 9, in which an extremely thin layer of about 0.03 mm to 0.30 mm is coated on the back side of the fabric 1 used for seats, trim covers, door trims, or sun visors. An ethylene vinyl acetate copolymer (hereinafter referred to as EVA) film 7, which is a resin film, is melt-bonded.

The cross-sectional view of the fabric 11 with EVA shown in FIG. 4 is a fabric 1 used for seats, trim covers, door trims, or sun visors, and the back side of the fabric 1 coated with a conventionally used liquid thermoplastic resin 3, which is extremely thin. EVA film 7, which is a resin film, is melt-bonded.

Figures 5 and 6 show the fabrics 9 and 11 with EVA mentioned above.
FIG. 3 is a cross-sectional view of the present invention when it is used for a seat, trim cover, door trim, sun visor, etc. In FIG. 5, a lining 15 such as a non-woven fabric or a metal cloth is attached to the EVA-attached fabric 9 shown in FIG. 3 through an elastic body 13 such as urethane. A processed portion 17 of the EVA-applied fabric 9 pressing the elastic body 13, the elastic body 13 such as urethane, and the lining 15 is welded together by a high-frequency welder that performs high-frequency heating, and has a concave shape. . FIG. 6 shows a fabric 11 with EVA attached to a lining 15 via an elastic body 13, as shown in FIG. EVA-attached fabric 11 and lining 15 pressing against elastic body 13
The processed portions are welded together using a high frequency welder or the like to form a concave shape.

Figures 7 and 8 are the EVA of Figures 3 and 4 above.
It is a sectional view when attached fabrics 9 and 11 are fixed to a plate material 19 such as a hardboard of a door trim. In FIG. 7, the fabric 9 with EVA shown in FIG. 3 is attached to a plate material 19 via an elastic body 13 such as urethane. The processed portion 21 of the EVA-attached fabric 9 via the elastic body 13 is
It is fixed while being pressed in a concave shape to the plate material 19 side by a high frequency welder or the like that performs high frequency heating. In FIG. 8, the fabric 11 with EVA shown in FIG. 4 is attached to a plate material through an elastic body 13 such as urethane. The processed portion 21 of the EVA-applied fabric 11 via the elastic body 13 is fixed while being pressed in a concave shape toward the plate material 19 by a high-frequency welder or the like that performs high-frequency heating.

Figures 9 and 10 are the same as those in Figures 3 and 4 above.
FIG. 3 is a cross-sectional view of EVA-covered fabrics 9 and 11 when used for a sun visor. In FIG. 9, an elastic body 13 such as urethane is inserted between the EVA-covered fabrics 9 of FIG. 3, and both EVA-covered fabrics 9 are fixed in a bag shape.
The fabric and the fabric processing section 23 are connected to each other via the elastic body 13.
It is fixed using a high-frequency welder or the like that performs high-frequency heating. Figure 10 shows fabric 1 with EVA shown in Figure 4.
Insert an elastic body 13 such as urethane between 1 and
The fabric 11 with EVA is fixed in a bag shape.
The fabric and the fabric processing section 23 are connected to each other via the elastic body 13.
It is fixed using a high-frequency welder or the like that performs high-frequency heating.

Next, the effect will be explained.

The manufacturing process for the seat trim cover shown in Figures 5 and 6 begins with the back side of the fabric 1 used for the interior.
EVA-coated fabric 9 is prepared by melt-bonding the EVA-coated film 7, or EVA-coated fabric 11 is prepared by melt-bonding the EVA-coated film 7 on the back side of the fabric 1 coated with resin 3 on the back side. Then the above
Fabrics made of EVA film melted and bonded 9, 11
It will be superimposed on the surface of the elastic body 13 laid on the lining 15 of. Thereafter, they are successively pressed and welded using a high-frequency welder that performs high-frequency heating. In this way, the seat trim cover using the EVA film 7 melts and adheres strongly even if it is thin, so there is no peeling of the welded part unlike when the EVA film is not used.
Furthermore, the occurrence of peeling caused by wear of the sewing thread exposed on the surface as in the case of sewing is eliminated. Moreover, since the EVA film is a thin layer and uses EVA-covered fabric compared to the conventional thick back coating, the cost is reduced.

In order to fix the fabric to the plate material 19 such as hardboard used for the door trim shown in FIGS. 7 and 8, first, the EVA film 7 is melt-bonded to the back of the fabric 1, or the resin 3 is applied to the back of the fabric 1. EVA film is then melted and bonded to the coated material to create a fabric. Next, the fabrics 9 and 11 are superimposed on the surface of the plate material 19 on which the elastic body 13 is laid. Thereafter, they are successively pressed and welded using a high-frequency welder or the like that performs high-frequency heating. In this way, fabrics using EVA film 7 can be used to quickly laminate fabrics and other films without using adhesives, unlike conventional fabrics that use adhesives to laminate fabrics and other films. This has the advantage of reducing costs and improving texture. Also extremely thin
For melt bonding using EVA film,
The cost is lower than that of conventional thick back coating materials. Furthermore, since the EVA film is extremely thin, it follows the uneven surface of the fabric and can easily be bonded even to uneven fabrics.

As explained above, according to the present invention, the structure is a vehicle interior fabric in which an ethylene vinyl acetate copolymer film is melt-adhered to the back side of the fabric or the resin-treated side of the back side of the fabric, so flame retardant treatment is applied. fabric, fabric using polyester thread,
The effect of greatly improving welding processing using a high-frequency welder or the like that performs high-frequency heating on fabrics having different thicknesses or densities and fabrics whose back surfaces have been processed can be obtained.

[Brief explanation of drawings]

Figures 1 and 2 are cross-sectional views of conventional interior fabric, Figure 3 is a cross-sectional view of the EVA fabric of the present invention, and Figure 4 is a cross-sectional view of the conventional interior fabric shown in Figure 1 with an EVA film adhered to it. , Fig. 5 is a sectional view of a seat trim cover using the fabric shown in Fig. 3, and Fig. 6 is a cross-sectional view of a seat trim cover using the fabric shown in Fig. 4.
A cross-sectional view using the fabric shown in the figure, Figure 7 is the third
A sectional view of the door trim shown in the figure, Figure 8 is the 4th section.
A cross-sectional view using the fabric shown in the figure, Figure 9 is the third
10 is a sectional view of the sun visor using FIG. 4. FIG. (Explanation of symbols representing main parts of drawings) 1
...Fabric, 3.Resin, 7.Ethylene vinyl acetate copolymer film (EVA film).

Claims (1)

[Claims] 1 A fabric in which a film of ethylene vinyl acetate copolymer with a thickness of 0.03 to 0.30 mm is melted and bonded to the back side of the fabric that serves as the outer skin of vehicle interior parts, or to the resin-treated surface of the back side of the fabric, and When manufacturing interior parts by joining other members, another member with an elastic body such as urethane interposed therebetween is placed opposite to the back surface of the film, and the film is locally pressed and subjected to high frequency heating to melt the film and create a fabric. A vehicle interior fabric capable of being high-frequency welded, characterized in that a material and other members are fixed to each other.