JPS60212313A - Laminated molding provided with intermediate material - Google Patents

Abstract

PURPOSE:To obtain the titled laminated molding for car interior material that is excellent in adhesive strength and heat resistance, free from peel in adhesive part and inexpensive and suitable for car interior material by conducting combination molding of surface material cloth, sheet with rough surface shape are laminated on the rear side and synthetic resin for the base in an injection mold. CONSTITUTION:Laminating material 5 obtained by melting intermediate material (such as foamed polyurethane sheet, etc.) 2 and surface material (such as cloth of nylon fiber etc.) 1 is fixed in a mold and for example melting polypropylene of a base 3 is injected to this laminating material at 10-22 deg.C and at 1,000kg/ cm<2>, combination-molded to obtain the decided laminated molding.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the improvement of a laminate molded product made of a skin and a thermoplastic resin and used as an automobile interior material such as a door trim or ceiling.

[Prior art]

Conventionally, for molded ceilings, pillar garnishes, etc., a thermoplastic resin such as polyvinyl chloride or polyvinyl acetate is applied to a base material such as hardboard or fiberboard, and then a fabric or a polyvinyl chloride sheet is layered and high-frequency bonded. Alternatively, a laminate molded product is used in which a plastic sheet is coated with adhesive, the above-mentioned skin material is applied, and then vacuum-formed into the desired shape.
Because it is carried out at a high temperature of 0℃.

Adhesive strength decreases during molding. Therefore, during vacuum forming, the cloth and plastics separate, making it impossible to obtain a desired molded product. Especially in recent years, when polyolefin resins such as polypropylene and polyethylene have become widely used, ordinary adhesives have low adhesive strength, and adhesives with strong adhesive strength, such as acrylic resin adhesives, are expensive and have a tendency to flow. There is a problem with sexuality.

[Purpose of the invention]

The present invention aims to solve the above-mentioned problems and provide a laminate molded product using a skin and a base resin that do not adhere to each other or are difficult to adhere to each other.

[Structure of the invention]

The present inventors adhered a skin material on the back surface of which an intermediate material capable of exhibiting an anchor effect with the base resin was adhered or fused to the fixed mold of an injection mold, and then placed the skin material between the movable mold and the It has been found that the objective can be achieved by press-fitting a molten resin and allowing the molten resin to permeate into the interior of the intermediate material.

In other words, the laminated molded product equipped with the intermediate material of the present invention is produced by bonding and molding a skin material with a fabric or sheet with a rough surface shape laminated on the back side and a synthetic resin base material in an injection mold. It is characterized by:

The thermoplastic resin used as the base material in the present invention is
In addition to polypropylene resin and polyethylene resin, ABS
A wide range of resins can be used, including vinyl chloride resin, vinylidene chloride resin, vinyl acetate resin, methacrylic resin, styrene resin, polyamide resin, polycarbonate resin, and polyacetal resin.

The skin material can be synthetic fabrics or non-woven fabrics such as nylon, polyester, acrylonitrile, woolen fabrics, cotton fabrics,
All conventional materials such as leather can be used.

The intermediate material that characterizes the present invention has a rough surface or a porous interior that allows the molten resin to permeate and exhibit an anchoring effect on or near the surface of the intermediate material, such as polyurethane foam. , polypropylene foam, polyethylene foam, thermoplastic elastomer, non-woven fabric, woven fabric, knitted fabric, raised fabric, tricot), cheesecloth, or paper with a thickness of about 3 rrrm is used. These can be easily laminated with the skin material using a conventional adhesive or heat-pressing. - As described above, the present invention utilizes the anchoring effect between the intermediate material and the base resin, so by using a base resin with an MI value of 20 or more, the permeability into the intermediate material can be increased. Therefore, in the case of a resin with a low MI value, the molten resin does not spread due to flow resistance, so it is possible to prevent "wrinkles" or "flow pattern patterns" on the skin material that occur on the surface of the molded product. Penetration is also affected by the structure of the intermediate material, so the injection molding conditions should be adjusted to 200 to 30
Adjust between 0°C and 20 to 1000 kg/cm.

Next, the present invention will be described in detail with reference to the drawings.

〔Example〕

FIG. 1 shows a partial cross-sectional view of a laminate molded product of the present invention, where 1 is a skin material, 2 is an intermediate material, 3 is a base material, and 4 is an adhesive layer penetrated with molten resin. Next, the molding process will be explained with reference to FIG.

Before starting the molding process, the intermediate material 2 is made with a thickness of 2 to 4 mm.
Using a foamed polyurethane sheet, a nylon fiber fabric with a thickness of about 3 av+ is used as the skin material 1, and these are moved in parallel in the longitudinal direction and passed through a pair of heated calendar rollers to fuse and obtain a laminate material 5. . Next, after attaching the laminated material 5 to the fixed mold 6 of the injection mold shown in FIG. 2-(a), the movable mold 7 is closed as shown in FIG. 10 polypropyref 3a
to 22°C and injected into a mold at about 1000 kg/cm'. Polypropylene was heated to an internal pressure of 400 kg/cm' (
Let it cool in the D mold for 20 to 30 seconds, then open the mold and open it.
Take out the laminated molded product 9 shown in c). When the cooled molded product was examined, it was found that the polypropylene had uniformly penetrated into the surface layer of the intermediate material 2, the fiber-like feel of the back skin material 1 was not impaired, and no deformation due to wrinkles or the like was observed.

〔Effect of the invention〕

Since the laminated molded product of the present invention has the above-mentioned structure, it has significantly improved adhesive strength compared to conventional products, has excellent heat resistance, and eliminates problems such as the bonded part floating under normal usage environmental conditions. Since it can be mass-produced by injection molding using an inexpensive base resin, the cost reduction effect is extremely large.

[Brief explanation of the drawing]

FIG. 1 shows a partial cross-sectional view of the molded product of the present invention, and FIG. 2 shows a cross-sectional view of the molding process, in which (a) shows the state with the laminated material attached, (b) shows the state of injection molding, and (c) shows the state of injection molding. indicates a molded product. In the figure ■... Skin material 2... Intermediate material 3... Base material 3a... Molten polypropylene 4...
Adhesive layer 5...Laminated material 6...Fixed type 7...Movable type

Claims (2)

[Claims] (1) Equipped with an intermediate material characterized by being formed by bonding and molding a skin material with a fabric or sheet with a rough surface shape laminated on the back side and a synthetic resin base material in an injection mold. Laminated molded product. (2) The laminate molded product according to claim 1, wherein the synthetic resin of the base material has a melt index of 20 or more.