JPS6243337A - Interior molded trimming for vehicle - Google Patents

Abstract

PURPOSE:To obtain flame-retardant interior molded trimming having excellent moldability and abrasion resistance by laminating unwoven cloth mainly composed of polypropylene fiber while mixed with such fiber as never fuse nor shrink when burning integrally with thermoplastic resin sheet. CONSTITUTION:Unwoven mat 1 is mainly composed of polypropylene fiber or mixture of polyester fiber and polypropylene fiber while mixing such fiber as never fuse nor shrink when burning, rayon, wool, hemp, aramid, phenol, carbon, ceramic, metal, for example, by 1-10wt%. Then it is punched 2 to form flame-retardant thermoplastic resin film 3 onto one face through coating or spraying. Thereafter, the thermoplastic resin sheet or glass fiber mat or sheet 4 is integrally molded with hot melt adhesive 5 of polyethylene resin film through lamination, heating and pressurizing. With such arrangement, flame- retardant interior trimming having excellent moldability and abrasion resistance can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to the structure of an automobile interior material for molding, and in particular to an automobile interior material for molding that has excellent moldability, wear resistance, and sufficient flame retardancy. The purpose is to obtain.

Conventional technology and its problems In recent years, nonwoven fabrics have been used as interior materials for automobiles, such as flare mats and
It is used as trunk lining material and door trim lining material. However, these are only used in the form of plates like rubber sheet laminates, or non-woven fabrics are bonded to iron plates with adhesives. Although it has been integrated by law, it has not yet been fully adopted as a molded ceiling material.

The reasons for the above are that wrinkles are likely to occur especially on curved surfaces when molding the base material for integral molding, that the abrasion resistance of the nonwoven fabric surface after molding is poor, and that the flame retardancy of the molded product ( There was a problem in that it could not fully satisfy all of the automobile safety standards applied to automobile materials, the combustion standards for automobile interior materials (Puff5s 302), etc.

Means for Solving the Problems The present invention aims to solve these problems and provide an automotive interior material for molding with a novel structure that has excellent moldability, wear resistance, and flame retardancy that can withstand practical use. The configuration will be specifically explained below.

The nonwoven fabric-forming fibers used in the molded automobile interior material of the present invention are preferably polypropylene fibers or polyester fibers from the viewpoints of heat resistance, light resistance, dimensional stability, lightness, elasticity, economic efficiency, and abrasion resistance. 6, @10
When using 0% non-woven fabric, in the flame retardancy test using FMVSS302 after forming an integrated laminate with a thermoplastic resin sheet, the degree of melting and falling of the non-woven fabric located on the lower side during combustion was large. The burning rate of the laminated material is lQm/mi
It is impossible to keep it below n.

Furthermore, if fibers such as nylon, vinylon, acrylic, etc., which melt and fall less when burned than the above-mentioned fibers, are mixed, it is possible to reduce the fall of the nonwoven fabric itself, but since the shrinkage when the fibers burn is large, Unable to prevent the upper thermoplastic resin sheet from falling, the burning rate of the integrated laminated material was reduced to 10%.
It is impossible to keep it below eta/min.

Therefore, in order to solve this problem, in order to burn the integrated laminated material, that is, the nonwoven fabric and the thermoplastic resin sheet, without causing them to fall during the combustion test, it is necessary to use cotton glue that does not melt and do not shrink during combustion. 1 to 10% fibers such as yarn, hemp, aramid, phenol, ceramic, carbon, metal, etc.
As a result of research, we found that it is sufficient to mix it with polyester fibers in a range of (weight ratio) to form a nonwoven fabric and form an integrated laminated material. Cotton or rayon is preferable from an economic point of view as a fiber that does not shrink and does not shrink.If the blending ratio of the fiber is less than t-1%, a falling phenomenon will occur and the effect will be weakened, and if it exceeds 10%. The mixing ratio is not preferable because the water immersion shrinkage rate of the nonwoven fabric itself increases. In order to improve the polishing purity (taper abrasion resistance) of the nonwoven fabric made of the above preferred tag formulation, after applying needle punching treatment at 300 to 900 punches/j, the abrasion resistance is further improved and integrated lamination is performed. In order to reduce the burning rate of the material, a chlorine-containing polymer such as vinyl chloride, ethylene-vinyl chloride, acrylic ester-vinyl chloride, ethylene-vinyl chloride, etc. By spraying or coating a single substance or a mixture of vinyl acetate-vinylidene chloride, vinylidene chloride, acrylic acid ester-vinylidene chloride resin, ethylene-vinyl chloride, etc., more preferably a single substance or a mixture of the above resins with an antimony compound added. Apply. The thermoplastic resin sheet to be laminated together with the above-mentioned non-woven fabric as a cushioning material is, for example, a sheet of PP5PI, PS, FUR, etc. or a foamed sheet, and may be a combustible type, but there is no problem even if a flame retardant type is used. There isn't.

can.

The automobile interior material for molding of the present invention constructed in this way can be used as an automobile ceiling material to prevent the occurrence of wrinkles on the curved surface portion during molding, and to improve the abrasion resistance of the woven fabric surface after molding, as well as shrinkage and melting during combustion. It has flame retardancy that passes the combustion standards for automobile interior materials (FMVSS302) without causing any fall.

Example 1 An example of the present invention will be described below based on the drawings. The drawing is a schematic side view of a molded automobile interior material according to an embodiment of the present invention, and l is a nonwoven fabric mat subjected to needle punching treatment, for example, polypropylene fiber 3 denier
511m 195%, rayon fiber 3 denier x 51cm 5
A web with a cotton weight of 200t/n+2 consisting of a blend of
A), or a striped basis weight of 200, in which cotton fiber is blended with the polypropylene fiber instead of the rayon fiber? /n? Web (B) T- is used, and the well-known needle punching process 2 is applied to the upper and lower surfaces of the web to form 300 punches/c1 each. 3 is a flame-retardant thermoplastic resin coating formed by coating or spraying on one side of the nonwoven fabric mat, for example, vinyl chloride emulsion, ethylene-vinyl chloride copolymer emulsion, etc. )T-attached and subjected to dry heat treatment.Furthermore, 4 is a thermoplastic resin sheet, for example, foamed polyethylene (PI), foamed polystyrene (PS), and polypropylene each having a thickness of 5 cm are used.Each of the above-mentioned nonwoven fabrics (A ) 03
) The surface on which the flame-retardant thermoplastic resin coating 3 is formed and the laminated surface of each of the above-mentioned thermoplastic resin sheets 4 are bonded or fused, for example, a hot melt polyethylene resin film (thickness 50 μm)
was used as the hot melt adhesive 5, 150°C x ω seconds x
Lamination, heating, and pressure treatment are performed under conditions of 500p/("ill" to form an integrated molded automobile interior material 6.In addition to the above-mentioned hot melt adhesive, solution adhesive or A frame lamination method can be used.

Example 2 1 is a nonwoven fabric mat subjected to needle punching treatment, for example, polypropylene fiber 3 denier x 51 mm 4
5%, polyester fiber J113 f ale x 51 shoes 1L
Rayon IF 1113 F Neil 51 5% striped weight 2o0p/rt? Using the web (C), needle punching treatment 2 was performed in the same manner as in Example 1 to form 1 t of nonwoven fabric, and then 3 t of flame-retardant thermoplastic resin coating was applied or sprayed on one side of the nonwoven fabric mat.
- formed. Further, a thermoplastic resin sheet 4 such as foamed polyethylene (PE) or foamed polystyrene (P 3 ) having a thickness of 5 mm is integrally laminated on the surface on which the flame-retardant thermoplastic resin coating 3 is formed.

The surface on which the flame-retardant thermoplastic resin coating 3 of each of the nonwoven fabrics (C) is formed and the laminated surface of the thermoplastic resin sheet 4 are bonded or fused, for example, using a hot melt polyethylene resin film (thickness 50 μm) t-hot melt. Used as adhesive 5,
Lamination, heating, and pressure treatment were performed under the conditions of 150°C x ω seconds x s00p/cMt to form an integrated molded automobile interior material 6.

In addition, in place of the thermoplastic resin sheet used in Examples 1 and 2 above, a nonflammable glass fiber sheet or mat (thickness 3 to
30~) was used to construct an automobile interior material.

Next, as a comparative example, polyester fiber 3 denier
A flame-retardant thermoplastic resin coating was applied to one side of a nonwoven fabric similarly formed using a web with a striped area weight of 20 (D/m') consisting only of 1.1 GO%, and the formation of this coating. A comparative example of an automobile interior material for molding in which each of the above-mentioned thermoplastic resin sheets is integrated on the surface (constructed by Sukekai).

Then, the molded automobile interior material η)ω) (C) 0)) of the present invention formed as described above and the automobile interior material as a comparative example (At-Taber wear test (Taber wear tester, wear wheel C3lQ, The results of the test (load: 500 ps, rotation speed: 150) and combustion test (FMVSS302) are shown in the table below.

As shown in the above table, the test results show that the product of the present invention had good results in both Taber wear and combustion tests, and in particular, a low combustion rate of 10 ca+/m or less was obtained, resulting in a passing product that satisfactorily satisfies the IFMVSS302 standard.

In addition, the nine types of automotive interior materials for molding shown above were heated to 100°C.
Heat it to 20 degrees under the pressure of IQI/7 along the shape mold.
As a result of carrying out a bending test (%) 1, no wrinkles were observed in any of them, and it was found that they had good moldability.

Effects of the Invention As described above, according to the structure of the present invention, the product has excellent moldability - no surface wrinkles are observed during molding, is lightweight, has excellent abrasion resistance, and has excellent heat resistance, light resistance, and dimensional stability. It is rich in
This invention has excellent effects such as passing the NVSS302 flame retardant test.

[Brief explanation of the drawing]

The drawing is a schematic diagram of an automobile interior material for molding showing one embodiment of the present invention.

Claims (5)

[Claims] (1) A nonwoven fabric composed of polypropylene fibers and at least one type of fiber that does not melt or shrink when burned, has a flame-retardant thermoplastic resin coating on one side, and the flame-retardant resin coating and the thermoplastic An automobile interior material for molding, characterized in that it is integrally laminated with a resin sheet by adhesive or heat fusion. (2) A nonwoven fabric made of a mixed fiber of polyester fiber and polypropylene fiber containing at least one type of fiber that does not melt or shrink when burned, has a flame-retardant thermoplastic resin coating on one side, and the flame-retardant resin An automobile interior material for molding, characterized in that a surface having a film and a thermoplastic resin sheet are laminated together by adhesive or heat fusion. (3) The automobile interior material for molding according to claims 1 and 2, wherein the fibers that do not melt or shrink during combustion are cotton, rayon, wool, hemp, aramid, phenol, carbon, ceramic, or metal. (4) The automobile interior material for molding according to claims 1 and 2, wherein the nonwoven fabric is subjected to needle punching treatment. (5) The automobile interior material for molding according to claims 1 and 2, in which a glass fiber sheet or mat is used instead of the thermoplastic resin sheet.