JPH0123307B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention mainly relates to a method of adhering a base material and a facing material used in manufacturing interior materials for automobiles and the like.

This type of interior material, such as automobile ceiling materials and door backing materials, uses base materials such as resin boards, cardboard, etc., as well as nonwoven fabrics, fiber knitted fabrics, plastic sheets, etc.
It has a structure in which a surface material made of a laminated sheet of a plastic sheet and a plastic foam sheet is attached. In order to attach the above-mentioned surface material to the above-mentioned base material, a method is often used in which a heat-sensitive synthetic resin layer is applied to the surface material and the backing material is polymerized with the base material and then pressurized. However, conventionally, such adhesion was performed using a heated press. However, as mentioned above, the covering material is made of fibers and plastic sheets with low heat resistance, so heat pressing can cause thermal denaturation and thermal deformation of the material.
Alternatively, problems such as loss of grain may occur.

The present invention aims to improve the above-mentioned drawbacks of the prior art, and its main feature is to coldly bond the base material and the facing material.

The invention will be explained in detail below.

As described above, the base material 1 is made of resin felt, cardboard, etc., and is heated into a predetermined shape, for example, a ceiling shape, by a heating press mold 2 consisting of an upper mold 2A and a lower mold 2B as shown in FIG. Press molded. This state is shown in FIG.

If resin felt is used as the base material 1, the mold surface temperature
The temperature is 180 to 220°C and the molding pressure is about 3 to 5 kg/cm ² .

Base material 1 formed into a predetermined shape as described above
is placed on the lower mold 3B of the compression mold 3 consisting of an upper mold 3A and a lower mold 3B, as shown in FIG. 3, and the facing material 4 is polymerized thereon. As described above, the facing material 4 is made of a laminated material of, for example, a polyvinyl chloride sheet 4A and a polyurethane foam sheet 4B, and the back side is lined with a heat-sensitive synthetic resin layer 4C made of, for example, polyethylene, polypropylene, polyamide, or the like. and the surface of the base material 1 and/or the facing material 4
The back surface of the thermosensitive synthetic resin layer 4C is heated in advance to a temperature higher than the activation temperature of the thermosensitive synthetic resin layer 4C.

Usually, in the method of the present invention, a heat-sensitive synthetic resin layer 4C with a low activation temperature is used, and in this case, the heating temperature of the surface of the base material 1 and/or the back surface of the facing material 4 is
The temperature should be around 120-140℃. Thus, as shown in FIG. 4, the base material 1 and the facing material 4 are bonded together by applying pressure with the pressure mold 3. At this time, it is desirable that the mold surface temperature of the pressure mold 3 is 20°C or less. For this purpose, the mold surface is cooled by passing a refrigerant such as water, brine, or Freon through a refrigerant passage 3C extending through the upper mold 3A and the lower mold 3B.

In this way, the ceiling material 10 in which the base material 1 and the facing material 4 are bonded together is manufactured. Ceiling material 10 is shown in FIG.

The present invention is not limited to the above-described embodiments; for example, the mounting material and the base material may be attached at the same time as the base material is molded. In this case, for example, it is preferable to use, as the base material, a thermoplastic resin felt in which fibers are bound together with a binder mainly composed of a thermoplastic synthetic resin. In order to simultaneously perform molding and adhesion of a surface material using such thermoplastic resin felt, the thermoplastic resin felt is heated above the molding temperature, the surface material is polymerized thereon, and then cold forming and adhesion are performed. .

As described above, the present invention heats the surface of the base material and/or the back side of the facing material lined with a heat-sensitive synthetic resin layer, and polymerizes the base material and the facing material,
Since the base material and the facing material are bonded together by cold pressurization, the facing material is not exposed to high temperatures, thereby preventing thermal denaturation, thermal deformation, and wrinkle reduction of the facing material. Can be effectively prevented.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a side sectional view before base material molding, FIG. 2 is a side sectional view after base material molding, and FIG. 3 is a side sectional view of the base material and facing material. FIG. 4 is a side sectional view before attachment, FIG. 4 is a side sectional view after attachment of the base material and facing material, and FIG. 5 is a perspective view of the resulting ceiling material. In the figure, 1... base material, 3... pressure bonding type, 4... facing material, 4C... heat sensitive synthetic resin layer.

Claims (1)

[Claims] 1 Heat the surface of the base material and/or the back side of the facing material lined with a heat-sensitive synthetic resin layer, polymerize the base material and the facing material, and cold pressurize the base material and the facing material. A method for adhering a base material and a facing material, the method comprising adhering a base material and a facing material.