JP2566213B2 - Interior materials for automobiles - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to relates to automotive interior material which is used, for example, a ceiling material or the like of an automobile.

[0002]

2. Description of the Related Art Conventionally, a polyvalent isocyanate is impregnated into a breathable sheet such as a polyurethane foam sheet and brought into contact with water vapor to polymerize the polyvalent isocyanate and to provide an interior material molded into a predetermined shape. (Japanese Patent Laid-Open No. 58-5346).

[0003]

However, there is a problem in that the interior material is breathable, and the surface of the interior material is significantly contaminated when air containing cigarette smoke, fine dust, etc. passes through the interior material. was there.

[0004]

Means for Solving the Problems As a means for solving the above conventional problems, the present invention is formed into a predetermined shape by using a breathable sheet (2) containing a synthetic resin as a base material . The thickness of the interior material (1) is 20 to 15 to prevent air passage.
The present invention provides an interior material for an automobile, in which a non-breathable film (2A) of 0 μm is interposed.

The breathable sheet (2) used in the present invention is a porous and breathable sheet such as a polyurethane foam sheet, a felt sheet, and a pulp sheet. Synthetic resins such as melamine resin, phenol resin, resorcin resin, epoxy resin, acrylic resin, styrene resin, vinyl chloride resin, vinyl acetate resin, ethylene-vinyl acetate resin, polyethylene, polypropylene, styrene-butadiene elastomer, urethane elastomer were included. In order to make the synthetic resin contained in the breathable sheet, a solution, an aqueous solution, an emulsion, etc. of the synthetic resin is applied or impregnated, or a monomer, an oligomer, a prepolymer which is a precursor of the synthetic resin, After coating or impregnating the initial condensate, etc., the polymer To.

The non-breathable film interposed in the interior material of the present invention is, for example, a polyethylene film or a polypropylene film having a thickness of 40 μm or more and 150 μm or less, preferably 50 μm or more and 100 μm or less, and more preferably 60 μm or more and 80 μm or less. Polyolefin film of 20 μm or more and 150 μm or less, preferably 30 μm or more and 100 μm or less, more preferably 30
Examples thereof include a polyamide film having a thickness of not less than 80 μm and a laminated film of a polyamide film having a thickness of 10 to 30 μm and a polyolefin film having a thickness of 10 to 30 μm.

A fiber layer may be laminated on the breathable sheet for reinforcement. The fiber layer is a polyester fiber, a polyamide fiber, an acrylic fiber, an acetate fiber,
Organic fibers such as cellulose fibers, glass fibers, carbon fibers,
The fibers may be webs of inorganic fibers such as ceramic fibers, whiskers, rock wool, and slag wool, non-woven fabrics, knitted fabrics, and the like, and two or more layers of the same kind or different kinds may be laminated. The fiber layer may be coated or impregnated with a thermosetting synthetic resin such as melamine resin, benzoguanamine resin, phenol resin, resorcin resin, or epoxy resin for reinforcement.

To manufacture the interior material of the present invention, the breathable sheet is coated or impregnated with a synthetic resin or a precursor of a synthetic resin, and the non-breathable film is attached to one or both sides thereof.

Then, if desired, a fiber layer for reinforcement is laminated and molded into a desired shape, and if desired, a curing agent such as heating or steam is contacted to cure the above synthetic resin or the above synthetic resin precursor. Polymerization and further curing, and when the fiber layer is coated or impregnated with a thermosetting synthetic resin, the thermosetting synthetic resin is cured.

In addition to the above method, the fiber layer may be laminated after molding the breathable sheet, or the coating layer of the thermoplastic synthetic resin may be formed after molding the breathable sheet. The non-breathable film may be attached to the outer surface of the fiber layer instead of being directly attached to the breathable sheet.

The breathable sheet and the non-breathable film are bonded together by using an adhesive, a hot melt sheet or the like, and the synthetic resin or synthetic resin precursor applied or impregnated on the breathable sheet is bonded. The breathable sheet and the fibrous layer may be used as an agent, and the synthetic resin or synthetic resin precursor applied or impregnated into the breathable sheet and the fibrous layer exudes under the pressure during molding and functions as an adhesive. Although they are laminated, they may be adhered separately using an adhesive or a hot melt sheet.

[0012]

The interior material (1) of the present invention has the non-breathable film (2A) interposed as described above, so that the breathability of the breathable sheet is suppressed by the non-breathable film.

[0013]

EXAMPLE FIG. 1 shows an example of the interior material (1) of the present invention. In the interior material (1), (2) is a polyurethane foam sheet containing a polymerized cured product of methylene diphenyl diisocyanate (MDI), and (2A) is 20 μm.
A non-breathable film composed of a laminated film of a polyamide film having a thickness of 30 μm and a polyethylene film having a thickness of 30 μm, which is attached to one side of the polyurethane foam sheet (2) via a hot melt sheet (2B). (3) is a glass fiber knitted fabric, (4) is a polyester fiber web layer, and the knitted fabric (3) and the web layer (4) are each impregnated with a melamine resin. ing. Further
(5) is a skin material made of polypropylene needle non-woven fabric, and the skin material (5) is adhered to the web layer (4) on the front side by a hot melt sheet (6).

In the interior material (1), a polyurethane foam sheet (2) is impregnated with an organic solvent solution (usually 50% by weight) of MDI having no active hydrogen so that the MDI becomes about 30% by weight, and then the Polyurethane foam sheet
The non-breathable film (2A) is attached to one surface of (2) via a hot melt sheet (2B). Knitted fabric for molding
(3) and the web layer (4) were respectively impregnated with 50% by weight melamine resin aqueous solution so as to have a resin content of about 35% by weight, and then polymerized on both surfaces of the polyurethane foam sheet (2), Hot pressing is performed for 3 minutes at 160 ° C. and a pressure of 3 kg / cm ² .

After forming a laminate of the polyurethane foam sheet (2), the knitted fabric (3) and the web layer (4),
Skin material (5) on its surface through hot melt sheet (6)
Crimp.

[0016]

[Effects of the Invention] Therefore , since the interior material for automobiles of the present invention has its breathability blocked by the non-breathable film, it becomes difficult for air to pass through, and the smoke or dust of cigarettes contained in the air causes Not susceptible to pollution.

[Brief description of drawings]

FIG. 1 is a partial side sectional view of an embodiment of the present invention.

[Explanation of symbols] 1 Interior material 2 Polyurethane foam sheet 2A Non-breathable film

Claims (1)

(57) [Claims] 1. A breathable sheet containing a synthetic resin as a base material .
Blocking air passage into interior material that is formed form a predetermined shape by
Automobile interior material, characterized in that it allowed intervening non breathable film having a thickness of 20~150μm to