JPH0939190A - Surface coat material for molded work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a surface coat material, to be adhesively attached to the surface of a molded work, which can be easily fabricated with a quality skin resemblance to and a flexible touch of the same degree as natural leather. SOLUTION: This surface coat material 10a which is attached to the surface of a molded work for coating the surface consists of a sheet-like elastic base 11 of a synthetic resin and a thin film-like surface coat 12 stuck to the surface of the elastic base 11 through an adhesive. The surface coat 12 is formed by removing a reticular layer as a constituent of natural leather. The surface coat 10a gives a quality skin resemblance to natural leather on account of the skin 12 of the surface coat, and also gives the flexible touch of natural leather on account of the elastic base 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skin material for a molding material, which comprises a base material formed into a predetermined shape and a skin material attached to the surface of the base material and covering the surface.

[0002]

2. Description of the Related Art As one type of interior material, a base material and a skin covering the surface of the base material, such as a seat backboard, a door trim, and an inner wall of a vehicle interior, are vacuum-formed. There is a molding processed material in which a skin material is integrally attached to the surface of a molding substrate molded into a predetermined shape by stamping molding processing, press bonding processing, or the like. In the molding process of the molded material, the skin material is stretched under heating or at room temperature and attached along the surface of the base material.

[0003]

In order to improve the quality of the molded and processed material, natural leather is sometimes used as the skin material, and the molded and processed material described above is naturally required. However, natural leather is
Compared to general woven and knitted fabrics and synthetic leather, it is difficult to stretch, and when it is heated, a rapid shrinkage occurs, causing a large dimensional change.
It is not suitable for use as a skin material for covering the surface of a three-dimensionally shaped substrate.

Therefore, when the base material of the molding material is covered with natural leather, the natural leather is appropriately cut and sewn into a three-dimensional shape corresponding to the surface of the base material, and the sewing process is performed. A method of adhering the formed skin material to the surface of the base material is adopted. However, when such a method is adopted, the molded product may give an uncomfortable feeling when compared with other interior materials, and the cost of manufacturing the molded product by cutting and sewing natural leather. There is a problem that will rise.

Accordingly, an object of the present invention is to provide a skin material having a surface of natural leather, excellent workability, and excellent dimensional stability when heated.

[0006]

SUMMARY OF THE INVENTION The present invention is a skin material for a molding material, which comprises a base material formed into a predetermined shape and a skin material that is attached to the surface of the base material and covers the surface. There
It consists of a sheet-like elastic base made of synthetic resin, and a thin film-like skin that is adhered to the surface of the base with an adhesive, and the net-like layer that constitutes natural leather is removed from the skin. It is characterized by being formed.

[0007]

[Operation and effect of the invention] In the skin material having such a constitution,
Since only the thin-film surface layer that makes up natural leather is used as the surface skin that forms the surface layer, its extensibility is improved compared to natural leather, and the dimensional stability when heated is due to the action of the elastic substrate. The property is improved. In addition, as a matter of course, the surface material has the texture of natural leather, and also has a soft texture equivalent to that of natural leather due to the action of the elastic base.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to the drawings. FIG. 1 (a) schematically shows a cross section of a skin material according to a first embodiment of the present invention. A cross section of a skin material according to a second embodiment of the present invention is schematically shown in FIG. 6B, and a cross section of natural leather is schematically shown in FIG. The skin material 10a according to the first embodiment is
An elastic base 11 made of polypropylene foam and a thin film skin 12 made of natural leather (cowhide) as an adhesive 13
The outer skin 12 is composed of the remaining silver surface layer S2 and the coating layer S3 excluding the net-like layer S1 constituting the natural leather S shown in FIG. 1 (c). . In the skin material 10a, the elastic substrate 11 has a thickness of 2 mm and the skin has a thickness of 0.3 mm.

Further, the skin material 10 according to the second embodiment.
b is an elastic base material 14 made of urethane foam and a thin film-like outer skin 15 made of natural leather (cowhide) as an adhesive 16
The outer skin 14 is a skin material 10a.
A skin similar to the skin 12 of FIG.
m, the skin is formed to a thickness of 0.2 mm.

The skin material 10a according to the first embodiment is
It is used as a skin material for the seat back board 20a of the vehicle seat shown in FIG. Seat back board 20a
As shown in FIG. 3, the surface material 10a is adhered to the surface of a base material 21 made of polypropylene resin formed into a predetermined shape, and is formed by the stamping mold processing method shown in FIG. . In this processing method, as shown in FIG.
As shown in (a), a skin material 10a is stretched between the lower mold 31 and the upper mold 32 of the mold, and then polypropylene is melted on the mold surface of the lower mold 31 as shown in FIG. Resin 33
, And finally, as shown in FIG.
2 is relatively advanced to pressurize the resin and the skin material 10a injected between the molds 31 and 32. As a result, the seat back board 20a is formed.

The skin material 10b according to the second embodiment is
The ornament part 2 of the door trim of the vehicle door shown in FIG.
Used as a 0b skin material. As shown in FIG. 6, the ornament part 20b of the door trim is formed by adhering the skin material 10b to the surface of the base material 22 made of a wood-based hardboard molded in a predetermined shape. 7
It is adhered to the base material 22 by the press adhesion processing method shown in.
In the processing method, as shown in FIG.
4, a base material 22 formed in a predetermined shape in advance is placed, and a skin material 10b having a predetermined shape whose back surface is coated with an adhesive is placed on a predetermined portion of the base material 22 to form a skin material 10b.
The upper die 35 applies pressure from above. As a result, the ornament portion 20b in the door trim is formed.

FIG. 8 is a graph showing an example of the amount of elongation of various kinds of skin materials with respect to stress. The elongation amount under the graph, the graph shows the elongation amount of the synthetic leather at 120 ° C. FIG. 9 is a graph showing the amount of elongation of the skins 12 and 14 used in the skin materials 10a and 10b according to the present embodiment with respect to stress,
The ranges from to in the graph indicate the amount of elongation at room temperature.

Referring to these graphs, the amount of elongation with respect to stress is the smallest in natural leather, but in the case of the outer skins 12 and 14, the value is close to the amount of knit elongation. This is each epidermis 1
Since 2 and 14 are thin and have a thin film shape compared to natural leather, the elongation characteristics are improved. The elongation characteristics required during molding processing while maintaining the surface texture of natural leather. Is fully secured. However, each epidermis 12,
Although 14 lacks the soft and unique texture of natural leather by itself, the elastic bases 11 and 13 attached to the back surfaces of the respective outer skins 12 and 14 are equivalent to the net-like layer constituting the natural leather. Demonstrate the characteristics. Therefore, the skin materials 10a and 10b according to the present invention have a surface texture and flexibility equivalent to those of natural leather, and also have sufficient elongation characteristics required at the time of molding.

Table 1 shown below shows dimensional changes of conventional skin materials such as natural leather, synthetic leather, knit (natural fiber), and skin materials 10a and 10b according to the present embodiment when heated at 100 ° C. Is shown. Of the values in the table,
A negative value means contraction of the skin material, and a positive value means expansion of the skin material. Referring to the table, it can be seen that natural leather has the lowest dimensional stability during heating as compared with other skin materials, and is not suitable for molding under heating. On the other hand, the skin material 10a according to the present invention has the same dimensional stability as a knit made of natural fibers, and the skin material 10b according to the present invention has the same dimensional stability as synthetic leather, It is understood that both of the skin materials 10a and 10b are suitable for molding under heating.

[0015]

[Table 1]

[Brief description of drawings]

FIG. 1A is a schematic enlarged partial sectional view of a skin material according to a first embodiment of the present invention, and FIG. 1B is a schematic enlarged partial sectional view of a skin material according to the second embodiment. ), And a schematic enlarged partial sectional view (c) of natural leather.

FIG. 2 is a perspective view of a seat including a seat back board formed by using the skin material according to the first embodiment of the present invention.

FIG. 3 is a partially enlarged transverse sectional view of the seat back board.

FIG. 4 is an explanatory view showing respective steps (a) to (c) of forming processing of the seat back board.

FIG. 5 is a perspective view of a door trim having an ornament formed by using the skin material according to the second embodiment of the present invention.

FIG. 6 is an enlarged partial vertical sectional view of the same ornament.

FIG. 7 is an explanatory diagram showing a molding processing step of the same ornament.

FIG. 8 is a graph showing the amount of elongation of each conventional skin material with respect to stress.

FIG. 9 is a graph showing the amount of elongation with respect to stress of the skin that constitutes the skin material according to the present invention.

[Explanation of symbols]

10a, 10b ... Skin material, 11, 14 ... Elastic substrate, 1
2,15 ... skin, 20a ... seat backboard, 20b
… Ornament part of door trim, 21, 22… Base material, 3
1, 32, 34, 35 ... Mold, 33 ... Molten resin, S ...
Natural leather.

Claims (1)

[Claims] 1. A skin material for a molding material, which comprises a base material formed into a predetermined shape and a skin material that is attached to the surface of the base material and covers the same surface. A sheet-like elastic base and a thin film-like skin attached to the surface of the elastic base via an adhesive, and the skin is formed by removing the net-like layer constituting the natural leather. A skin material for a molded material characterized by the above.