JPH04276440A - Backing material for cloth - Google Patents

Abstract

PURPOSE:To provide a backing material for cloth with which lie-down of fuzz of the cloth is removed and which can be formed to even the shape of complicated curved surface. CONSTITUTION:As the composition of the backing material 32 laminated on the rear surface of a cloth 31, PVC resin of low polymerization degree is used, and the compounding ratio of plasticizer to it is made small.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] This invention relates to a backing material for cloth that maintains the molded shape of the cloth, and in particular,
This invention relates to a backing material for cloth that eliminates the hair falling of the cloth and has excellent moldability.

0002

BACKGROUND OF THE INVENTION Conventionally, resin sheets such as PVC sheets and ABS sheets, and fabric sheets such as cloth and carpets have been used as interior skin materials for automobiles.

FIG. 4 shows an automobile door trim, which is an example of an automobile interior part.
The door trim main body 2 is generally composed of a door trim main body 2 formed into a desired shape, and a decorative member 3 attached to a predetermined location on the surface of the door trim main body 2.

Regarding the structure of the door trim body 2 and the decorative member 3, first, the door trim body 2 includes a shape-retaining core material 2a made by hot-pressing a wooden mat or the like into a desired shape, and It consists of a skin material 2b such as a PVC sheet that is integrally attached to the surface side of the core material 2a by vacuum forming or the like (see FIG. 5).

On the other hand, the decorative member 3 has a structure in which a backing material 3b such as a PVC sheet is laminated on the back surface of a cloth 3a. There is usually one.

That is, first, as shown in FIG. 6, the backing material 3b side of the decorative member 3 is heated by the heater 4.
After the backing material 3b has been softened, as shown in FIG. 7, it is press-formed into a desired shape using upper and lower cold press molds 5 and 6, and trim cutting is simultaneously performed using cutting blades 7 provided around the lower press mold 5. A decorative member 3 having the shape shown in FIG. 5 is manufactured.

[0007] The conventional structure of the backing material 3b of the decorative member 3 is PVC resin (polymerization degree 1300) 10
0 parts by weight, DOP plasticizer; 40 parts by weight, ABS
Generally, a composition containing 20 parts by weight of a resin and 20 parts by weight of a filler such as charcoal is extruded into a sheet.

[0008]

[Problems to be Solved by the Invention] However, in the decorative member 3 using the backing material 3b of the conventional structure, the surface temperature of the backing material 3b is set to 180° C. or higher in the heating process and press molding process of the decorative member 3. Otherwise, molding would be difficult, and on the other hand, if the surface temperature of the cloth 3a was not 100° C. or lower, there was a problem that the hair of the cloth would fall.

As shown in the graph shown in FIG. 8, in the conventional decorative member 3 consisting of a cloth 3a and a backing material 3b, it is inevitable that the hairs of the cloth fall down in order to be formed into a desired shape. At present, it has been pointed out that this tendency is remarkable, particularly when using brushed cloths, resulting in a significant deterioration in the appearance of the product.

The present invention was made in view of the above circumstances, and an object of the present invention is to improve the formability of the cloth by changing the composition of the backing material laminated on the back side of the cloth. To provide a backing material for a cloth which can secure the hair of the cloth and prevent the hair of the cloth from falling down as much as possible.

[0011]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a cloth backing material that is laminated on the back side of a cloth and retains the molded shape of the cloth that has been thermoformed into a desired shape, The backing material has a polymerization degree of 8.
00 to 1300 PVC resin, 20 to 40 parts by weight of plasticizer, 20 parts by weight of ABS resin, and 20 parts by weight of filler are mixed and extruded into a sheet shape. shall be.

Regarding the degree of polymerization of the PVC resin, if the degree of polymerization is less than 800, it will be difficult to extrude into a sheet, and if the degree of polymerization exceeds 1300, the molding temperature will be 180° C. as in the conventional method. A high temperature is required.

[0013] Furthermore, the mixing ratio of plasticizer was changed to 10 to 10 for PVC resin.
20 to 40 parts by weight compared to 0 parts by weight.
If the amount is less than part by weight, the hardness of the backing material will be too hard.
This is because roll winding operation during storage of the original fabric and rework after crimping become difficult, and if it exceeds 40 parts by weight, shape retention tends to be impaired.

[0014]

[Function] As is clear from the above structure, by setting the degree of polymerization of PVC resin to a low degree and lowering the proportion of plasticizer, it is possible to mold at low temperatures and achieve the desired shape retention. is obtained.

Furthermore, since the heating time can be set short, the molding cycle can also be shortened.

[0016]

[Embodiments] Hereinafter, embodiments of the backing material for cloth according to the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 show the present invention applied to a skin material for an automobile interior, with FIG. 1 showing a perspective view of a door trim, and FIG. 2 showing a sectional view of the same door trim.

In FIG. 1, this automobile door trim 1
0 is generally composed of a door trim body 20 molded into a desired shape and a decorative member 30 attached to the lower surface side of the door trim body 20.

The door trim body 20 is formed by thermo-pressing a wooden mat into a desired shape, as shown in FIG.
A core material 21 with shape retention properties, and a skin material 2 such as a foamed PVC sheet that is integrally attached to the surface side of the core material 21 by vacuum forming or the like.
2, the decorative member 30 is composed of a cross 31
and a backing material 3 laminated on the back side of the cross 31
The door trim body 20 is made of a laminate with the door trim body 20
It is molded into a required shape corresponding to the surface shape of the

By the way, the feature of the present invention is that the composition of the backing material 32 is as shown in Table 1, so that the decorative member 3
When molding the cloth 31, the hairs of the cloth 31 do not fall and can be freely molded into any shape.

[0021]

[Table 1]

According to the composition of the present invention, as shown in the graph shown in FIG.
Molding is possible at 0°C, and if the conditions shown by the diagonal line in the graph of FIG.
It can be easily understood that there is no hair fall (No. 1) and good moldability is obtained.

[0023] In the above-mentioned embodiment, the present invention is applied to the backing material 32 of the decorative member 30 of the door trim 10, but the present invention is not particularly limited to the application as long as it is an interior skin material for automobiles. .

[0024]

[Effects of the Invention] As explained above, in the backing material for cloth according to the present invention, the degree of polymerization of the base PVC resin is set low, and the composition ratio of the plasticizer is set low, so that the molding temperature is set low. This makes it possible to prevent the hairs of the cloth from falling during molding as much as possible.
It has the effect of maintaining a beautiful appearance without impairing the texture of the cloth and improving the appearance design.

Furthermore, since low-temperature molding is possible, the heating time can be set short and the molding cycle can be shortened.
This has the effect of improving production efficiency.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an automobile door trim to which the present invention is applied.

FIG. 2 is a sectional view showing the structure of the door trim shown in FIG. 1.

FIG. 3 is a graph showing the correlation between the surface temperature of the backing material and the surface temperature of the cloth in the decorative member to which the present invention is applied.

FIG. 4 is an external view showing the door trim.

5 is a sectional view showing the structure of the door trim shown in FIG. 4. FIG.

FIG. 6 is a sectional view showing a heating process for a decorative member.

FIG. 7 is a sectional view showing the pressing process of the decorative member.

FIG. 8 is a graph showing the correlation between the surface temperature of a backing material and the surface temperature of a cloth in a conventional decorative member.

[Explanation of symbols]

10 Automotive door trim 20 Door trim body 21 Core material 22 Skin material 30 Decorative parts 31 Cross 32 Backing material

Claims (1)

[Claims] Claim 1: Laminated on the back side of the cloth (31),
A cloth backing material (32) that maintains the molded shape of a cloth (31) thermoformed into a desired shape, the backing material (32) being made of PV having a polymerization degree of 800 to 1300.
100 parts by weight of C resin, 20 to 40 parts by weight of plasticizer, 20 parts by weight of ABS resin, and 20 parts by weight of filler are mixed, and the mixture is extruded into a sheet shape. Backing material.