JPH08229256A - Surface material for interior finishing of automobile - Google Patents

Abstract

PURPOSE: To provide a surface material for interior finishing of automobiles which is used for interior finishing of automobiles, such as sheet cover, and has excellent hygroscopicity. CONSTITUTION: A backing less skin material 2 of a fiber system is bonded and integrated in dotty adhesive parts 5 to the top ends of small build-ups 4 on the front surface of a double layered wadding material 1 formed by depositing a web layer 1a consisting of hygroscopic synthetic fiber filaments and an air permeable nonwoven fabric sheet 1b in the state that the filaments of the web layer 1a are entangled by needle pricking and that a part of the filaments are arranged with each other as the numerous small build-ups 4 apart required spacings from the front side of the air permeable nonwoven fabric sheet 1b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile interior surface material used as a lining material for automobile door trims and ceiling trims and as a seat cover material.

[0002]

2. Description of the Related Art As a surface material for an automobile interior of this kind, as is seen in Japanese Utility Model Publication No. 1-103400, polyurethane foam having excellent volume and cushioning property is used as a wadding material and knitted on the surface. Laminated skin materials obtained by laminating a backing skin material with a backing on a ground or a woven fabric have been often used, but in this kind of laminated skin material, there is a problem that the moisture absorption performance is inferior.
Since the strength is insufficient, a high-quality fabric skin material is inevitably used as a fabric skin material, which causes a problem of high cost. In addition, polyurethane foam has problems in terms of waste pollution and recycling.

In order to solve such a problem, recently, a surface material for automobile interiors has been proposed in which a wool-based fiber web is used as a wadding material and a skin material is adhered integrally with the wadding material. It is the current situation that such a fiber web can be used only in high-end vehicles because of its high cost.In addition, the one in which the skin material is directly bonded and integrated with the fiber web is used for automobiles because of the fuzz on the surface of the fiber web. If the required adhesive strength cannot be obtained, or if a large amount of adhesive is used, the fibrous web collapses during peeling of the skin material and cannot be reused, or the cushioning property is impaired.

[0004]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned conventional problems and uses a fiber-based wadding material without using the polyurethane foam having the above-mentioned problems. In addition to exhibiting hygroscopicity, it has sufficient adhesive strength with the skin material necessary for automobiles, and yet it can secure excellent texture and cushioning property, and the production cost is extremely low. It was completed for the purpose of providing a surface material for automobile interiors.

[0005]

The surface material for an automobile interior of the present invention, which has been made to solve the above-mentioned problems, has a web layer made of a hygroscopic synthetic fiber filament and a breathable non-woven fabric sheet, which are formed by needle stick processing. The filaments of the web layer are entangled with each other, and some filaments are arranged on the surface of the breathable non-woven sheet as a myriad of small ridges from the front side of the breathable nonwoven sheet. The backingless skin material is bonded and integrated at a point-shaped bonding portion at the tip of the small ridge.

[0006]

When such a surface material for an automobile interior is used in the same manner as a lining material for an automobile door trim or a ceiling trim, a seat cover material and other conventional surface interior materials for an automobile of this kind, it has a conventional appearance. Although it is the same as the surface material for automobile interiors, the fiber-based wadding material used as a burying material instead of polyurethane foam is entangled and integrated with the filaments of the web layer by needle stick processing. In comparison with the one using polyurethane foam as the base layer, it has a volume feeling comparable to that of the one using polyurethane foam as the base layer, and does not cause a sag when using a thick wadding material. It will exhibit excellent cushioning properties. Moreover, since the wadding material is composed of a web layer made of hygroscopic synthetic fiber filaments and a breathable nonwoven fabric sheet, it exhibits excellent hygroscopicity. Further, the adhesion of the skin material to the wadding material is not surface adhesion to a non-woven fabric structure with a lot of fluff, but a myriad of small filaments in which some filaments of the web layer are projected from the front side of the breathable nonwoven sheet by the needle sticking process. Since they are point-bonds that are bonded and integrated at the point-shaped bonding portion at the tip of the ridge, the two are bonded and integrated with sufficient bonding strength, and the expansion and contraction characteristics and texture of the skin material are not impaired by the bonding.

[0007]

EXAMPLE An automobile seat cover using the present invention will now be described in detail as an example. In the figure, reference numeral 1 denotes a multi-layer wadding material in which a breathable nonwoven fabric sheet 1b is added to the surface of a web layer 1a made of a hygroscopic synthetic fiber filament and is adhered and integrated by needle stick processing. This multi-layer wadding material 1 is made up of a number of small ridges 4 in which filaments of the web layer 1a are entangled by the needle sticking process described above, and some filaments are projected from the front side of the breathable nonwoven fabric sheet 1b at required intervals. The multilayer wadding material 1 has a thickness of about 1 to 20 mm and the web layer 1a has a basis weight of 5 mm.
It is about 0 to 1000 g / m ² .

As the hygroscopic synthetic fiber filaments described above, in the examples, the product name is Welkey (manufactured by Teijin Ltd.)
As a hollow porous shape commercially available as
It may be one having a modified cross section, one in which the fiber itself is made of a hygroscopic material, or a synthetic fiber filament generally called a hygroscopic fiber. Further, in the examples, all of the web layer 1a of the composite wadding material 1 is made of hygroscopic synthetic fiber filaments, but it is also possible to arbitrarily combine hygroscopic fiber filaments depending on the purpose of use. Of course, it can be selected.

In the present invention, the multi-layer wadding material 1 is entangled with the filaments of the web layer 1a by needle sticking so that the filament bundle 3 is erected, and some filaments of the filament bundle 3 are breathable. The non-woven fabric sheet 1b is arranged as an infinite number of small ridges 4 protruding from the front side of the non-woven fabric sheet 1b at required intervals.
The skin material is adhered and integrated with the apex of the innumerable dot-shaped adhesive portions 5. Here, the filament bundles 3 are erected between the front and back surfaces of the multi-layer wadding material 1 so that the multi-layer wadding material 1
It acts to secure the excellent cushioning property by adequately preventing the fatigue from occurring, and the innumerable spot-shaped adhesive parts 5 ensure the excellent adhesive strength and the excellent texture. To act.

Further, as the breathable nonwoven fabric sheet 1b forming the surface layer of the multi-layer wadding material 1 which is attached to and integrated with the web layer 1a by needle stick processing, polypropylene fiber, polyester fiber, polyamide Thickness of 0.3-0.8 mm, made of system fibers, and basis weight 5-50 g / m ²
A spunbonded non-woven fabric having a degree of coarseness and good breathability, but having abrasion resistance is preferable, but if it can be configured as described above by needle stick processing and is breathable, then There is no limitation.

On the other hand, the skin material which is adhesively integrated with the surface of the multi-layer wadding material 1 is a fabric skin material such as a knitted fabric, a woven fabric, a non-woven fabric, etc. Any material having abrasion resistance and breathability may be used, but since the surface layer of the multi-layer wadding material 1 is the breathable nonwoven fabric sheet 1b, it is not necessary to use an expensive laminated skin material at all, and therefore, for strength reasons. In the past, the mass that is rarely used alone is 23.
Even if the fiber-based backingless skin material 2 having a low basis weight of about 0 to 360 g / m ² is used, the required strength can be obtained in the longitudinal, lateral and bias directions, which is economical.

Further, the adhesive for adhering the backingless skin material 2 with the top of the small ridge 4 projecting from the surface of the multi-layer wadding material 1 as the dot-shaped adhesive portion 5 has sufficient adhesive strength. There are no particular restrictions on the type of adhesive such as water-soluble or hot-melt type, as long as it can be adhered to, but considering the problems in the working environment, an emulsion of acrylic-vinyl acetate copolymer. It is preferable to use a water-soluble adhesive such as Then, since the multi-layer wadding material 1 and the backingless skin material 2 are bonded and integrated at the innumerable spot-shaped bonding portions 5 by using this adhesive, the amount used is smaller than that of the entire bonding, and the emulsion is used for the entire bonding. 40 compared to 150-300 g / m ² for type
˜100 g / m ² , hot melt type 10 to 30 g / m ² , and sufficient adhesive strength can be obtained.

Like the conventional surface material for automobile interiors of this kind, the thus constructed one is cut into an arbitrary size by a known means and then sewn to form a seat cover which is used as a pad material. When coated, the external appearance is the same as that of conventional surface materials for automobile interiors of this kind, but the fiber-based multi-layer wadding material 1 used as a decubitus material instead of polyurethane foam is needle stick processed. As a result, the filament bundle 3 is entangled and integrated between the front and back surfaces of the web layer 1a and the breathable nonwoven fabric sheet 1b attached to the surface of the web layer 1a. It also has a volume feeling comparable to that of the above, and even if it is thick, it exhibits excellent cushioning properties without causing fatigue. It becomes a. Further, since the multi-layer wadding material 1 and the backingless skin material 2 both have hygroscopicity, they exhibit excellent hygroscopicity that has never been obtained.

Moreover, since the backing-less skin material 2 is adhered to the wadding material 1 not by surface adhesion to a non-woven fabric structure having a lot of fluff, but by the point adhesion in the innumerable point-like adhesive portions 5, the two have sufficient adhesive strength. In addition to being bonded and integrated with each other, the expansion and contraction characteristics and texture of the backingless skin material 2 can be freely expanded and contracted in any of longitudinal, lateral and bias directions, and the breathable nonwoven fabric sheet 1b can be formed. Since the effect of preventing the filament bundle 3 from coming off is exerted, even when the small ridge 4 is pulled up when the backingless skin material 2 is peeled off, the filament bundle 3 comes off together with the backingless skin material 2 and the web layer 1
It becomes possible to recycle without a collapse.

[0015]

As is apparent from the above description, the present invention uses a fiber-based wadding material without using polyurethane foam, which has problems in waste pollution or recycling and also in strength. And moreover,
Not only can it exhibit excellent hygroscopicity, it also has sufficient adhesive strength with the skin material required for automobiles, and it can also secure excellent texture and also cause sag. It has various advantages that cannot be seen in conventional surface materials for automobile interiors, which can ensure excellent cushioning properties and also have extremely low production costs. Therefore, the present invention has an extremely great contribution to the development of industry as a surface material for automobile interiors that has eliminated the conventional problems.

[Brief description of drawings]

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

[Explanation of symbols] 1 wadding material 1a web layer composed of hygroscopic synthetic fiber filaments 1b breathable non-woven sheet 2 fiber-based backingless skin material 4 small ridges 5 dot-shaped adhesive parts

Claims (2)

[Claims] 1. A web layer (1a) made of a hygroscopic synthetic fiber filament and a breathable nonwoven fabric sheet (1b) are entangled with each other by a needle stick process, and some filaments are aerated. Fiber backingless skin material (2) on the surface of the multi-layer wadding material (1) applied as a number of small ridges (4) arranged at required intervals from the front side of the non-woven fabric sheet (1b). ) Is bonded and integrated at the point-shaped adhesive portion (5) at the tip of the small ridge (4), the surface material for automobile interior. 2. The breathable nonwoven fabric sheet (1b) has a basis weight of 5 to 5.
The surface material for automobile interiors according to claim 1, which is a spunbonded non-woven fabric sheet having a thickness of 0.3 to 1 mm at 30 g / m ² .