JP3129621B2 - Automotive interior surface materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface material for a vehicle interior such as a door trim, a ceiling trim, and a seat cover for a vehicle interior.

[0002]

2. Description of the Related Art As this kind of surface material for automobile interior, as shown in Japanese Utility Model Laid-Open No. 1-103400, a fabric surface such as a knitted fabric or a woven fabric is formed on the surface of a polyurethane foam excellent in volume and cushioning properties. Laminated skin materials have been used in many cases.However, in this type of laminated skin material, polyurethane foam has insufficient strength. As a result, there is a problem that the cost is increased, and the polyurethane foam has a problem in terms of disposal pollution or recycling.

In order to solve such a problem, recently, a surface material for an automobile interior in which a fiber web is used as a wadding material instead of a polyurethane foam and a skin material is integrally bonded to the wadding material has been proposed in Japanese Utility Model Laid-Open Publication No. 5-159999 and Japanese Unexamined Patent Publication No. 4-33
Although it is proposed by Japanese Patent No. 2590 or the like, it is common to use a water-soluble adhesive to bond and integrate the wadding material and the skin material, and the adhesive penetrates to impair the flexibility of the skin material. In addition to this, it is necessary to perform high-temperature drying under a pressure of a roll or the like to perform the bonding treatment, and thus there is a problem that the surface of the skin material may fall down or a whitening phenomenon may occur. Furthermore, if the skin material is to be bonded with a small amount of adhesive, the required adhesive strength for automobiles cannot be obtained due to the fluffing of the surface of the fibrous web. There was also a problem that was damaged.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems and uses a polyurethane foam which has problems in terms of waste pollution or recycling and also has a problem in strength. In addition to using fiber-based wadding materials without having sufficient adhesive strength with the skin material required for automobiles, it is possible to ensure a supple feel without infiltration of adhesive. It has been completed with the aim of providing a surface material for automobile interiors that can prevent hair fall and whitening phenomenon on the surface of the skin material as well as has excellent texture and extremely low production cost. It is a thing.

[0005]

Means for Solving the Problems A surface material for an automobile interior according to the present invention which has been made to solve the above-mentioned problems is provided with a skin material on a surface of a wadding material in which fiber filaments are entangled and integrated by needle sticking. A surface material for an automobile interior which is integrally bonded and formed of a hot melt adhesive in which countless small protrusions with fiber filament ends protruding are formed on the surface of a wadding material and a skin material is provided on top of the small protrusions. It is characterized in that it is bonded and integrated with a shape-like bonding portion.

[0006]

When used as a surface material for a vehicle interior such as a door trim or a ceiling trim of a vehicle interior or a seat cover, the appearance of the vehicle interior material is the same as that of a conventional vehicle interior material. Although it is not different from the surface material for the material, the fiber-based wadding material used in place of the polyurethane foam as the depressing material is one in which the fiber filaments are entangled and integrated by needle piercing, It will exhibit a volume feeling comparable to that using polyurethane foam as the base layer, and the tip of the fiber filament shall be projected as countless small protrusions from the surface, and the skin material shall be Since the top of the small ridge is bonded and integrated as a point-like adhesive made of hot melt adhesive, it is bonded and integrated with sufficient bonding strength In terms of being, any kind of be used skin material stretch properties and texture possessed by the skin material is never compromised by adhesion by a point bonding in a myriad of point-like bonding portion. In addition, since it is a hot-melt adhesive, it does not penetrate the adhesive and ensures a flexible feel. Occurrence is surely prevented.

[0007]

Next, an automobile seat cover using the present invention will be described in detail as an embodiment. In the figure, 1 is a fiber-based wading material in which fiber filaments obtained by mixing low-melting fiber filaments and high-melting fiber filaments in a web form are entangled and integrated by needle sticking, and 2 is bonded and integrated to the surface thereof. The wadding material 1 is a fibrous web having a thickness of about 1 to 20 mm and a basis weight of 50 to 1000 g / m ² . In the examples, the wading material 1 is a mixture of a low-melting fiber filament and a high-melting fiber filament. However, the wadding material 1 may be composed of only ordinary fiber filaments or a fiber filament obtained by arbitrarily combining them. Needless to say, it can be selected as appropriate.

In the present invention, the wadding material 1 is constructed such that the fiber filaments project from the surface thereof as innumerable loop-shaped small ridges 3 by needle sticking from the back side. The skin material 1 is bonded and integrated with the top portion as a point-like bonding portion 4. As an adhesive for bonding the laminated wadding material 1 and the skin material 2, a hot-melt adhesive is used unlike a conventional water-soluble adhesive. The hot-melt adhesive is made of a thermoplastic resin such as polyethylene terephthalate or polypropylene or a thermosetting resin such as a moisture-curable urethane resin, and has a viscosity of 3000 to 30000 cps. It is about 5 to 30 g / m ² .
Then, using such an adhesive, the laminated wadding material 1
And the skin material 2 are bonded and integrated at an innumerable number of point-like bonding portions 4. Since the amount used is not the whole surface bonding, the amount is 50 to 80% in the emulsion type and 20 to 70% in the hot melt type as compared with the whole surface bonding. %, And sufficient adhesive strength can be obtained.

Further, as in the embodiment, a high-density nonwoven fabric surface layer 5 may be attached to the surface of the fiber filament layer of the wadding material 1 and laminated and integrated by the needle piercing process. It is preferable because the strength of the wadding material 1 is further improved and the entanglement with the filament is further strengthened. Such a high-density nonwoven fabric surface layer 5 is made of polypropylene-based fiber, polyester-based fiber, polyamide-based fiber or the like having good abrasion resistance which is commercially available as spunbond and has a thickness of 0.3 to 2 mm and a basis weight of 5%. ~
Generally, a nonwoven fabric sheet of about 200 g / m ² is used, but the material is not limited to such a material as long as the material can have the above-described configuration by needle sticking.

On the other hand, the skin material 2 bonded and integrated with the surface of the fibrous wadding material 1 has no problem in terms of disposal and pollution in fabrics such as knitted fabrics, woven fabrics and nonwoven fabrics, and is required as a skin material. Any type can be used as long as it has a certain degree of wear resistance. When the high-density nonwoven fabric surface layer 5 is laminated as a reinforcing sheet, a low-weight fabric skin having a mass of about 230 to 360 g / m ^2, which is conventionally rarely used alone for strength reasons, is used. Even if a material is used, the required strength can be obtained in the vertical, horizontal, and bias directions. Therefore, in view of cost, it is possible to use such a low-weight fabric skin material.

As shown in FIG. 2, such a surface material for automobile interior is, for example, a wading material supply roll 10.
Material 1 and skin material supply roll 11 supplied from
Is supplied to the pressure-bonding rolls 12, 12, and after laminating, it can be sequentially wound up and continuously produced by a winding-up roll 13. At this time, if the hot melt adhesive is supplied in the form of dots by a hot melt coating machine 14 such as a slit nozzle, the adhesive is formed in a dot form corresponding to the tip of the small ridge 3 projecting on the surface of the wading material 1. It will be formed as the bonding part 4.

[0012] Like the conventional surface material for automobile interiors, 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 appearance is the same as that of a conventional surface material for automobile interiors, but the fiber-based wadding material 1 used in place of polyurethane foam as a pressure-resistant material has a fiber filament with a needle puncture. It is entangled and integrated by processing, and exhibits a volume feeling comparable to that using polyurethane foam as the base layer, and excellent cushion without sagging It will demonstrate the nature.

Further, the bonding of the skin material 2 to the wadding material 1 is not surface bonding to a non-woven fabric structure having a lot of fluff, but is point bonding to the small ridge 3 at the tip of the filament projecting to the front side of the wadding material 1. Therefore, the two are bonded and integrated with sufficient bonding strength, and the point bonding at the countless point-like bonding portions 4 makes it possible to use any kind of skin material, The texture is not impaired by the adhesion, and the skin material 2 is integrated with the wading material 1 while maintaining a certain degree of freedom. Even if it is used, the elastic properties and texture of the skin material 2 are not impaired by the adhesion. Further, using a fiber-based wading material 1 in which countless small ridges 3 from which a part of a fiber filament has been drawn out are formed, the wadding material 1 and the skin material 2 are point-like bonded to the top of the small ridges 3. Since the portion 4 is bonded and integrated, even if a force in the direction of peeling is applied to the skin material 2, the fiber filament itself following the small ridge 3 will be pulled up together with the skin material 2, so that it becomes difficult to peel off. Sufficient adhesive strength can be obtained in combination with the flexibility due to the expansion and contraction of a part of the fiber filaments constituting the bumps 3 and the skin material 2
There is also an advantage that the degree of freedom of expansion and contraction can be greatly increased. In addition, since a hot melt adhesive is used as an adhesive between the wadding material 1 and the skin material 2, a flexible feel can be ensured without infiltration of the adhesive, and pressure and No heat treatment is required, and the occurrence of hair falling or whitening on the surface of the skin material is reliably prevented.

[0014]

As apparent from the above description, the present invention uses a fiber-based wadding material without using a polyurethane foam which has problems in terms of disposal pollution or recycling and also has a problem in strength. In addition to having sufficient adhesive strength with the skin material required for automobiles, it can ensure a supple feel without the infiltration of the adhesive, and at the same time, the hair surface has fallen and whitened. The occurrence of the phenomenon can be surely prevented, and there are various advantages that cannot be seen in the conventional automobile interior surface materials that are excellent in texture and extremely low in production cost. Furthermore, when the high-density nonwoven fabric surface layer is laminated on the surface of the fiber filament layer of the wadding material as described in claim 2, the type of the skin material can be diversified because the strength of the wadding material is further improved. The entanglement with the fiber filament becomes stronger, which is preferable. Therefore, the present invention has an extremely large contribution to industrial development as a surface material for automobile interiors which has eliminated the conventional problems.

[Brief description of the drawings]

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

FIG. 2 is a schematic view showing an example of a production process of a surface material for an automobile interior according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wadding material 2 Skin material 3 Small ridge 4 Point-like bonding part 5 High density nonwoven fabric surface

Claims (2)

(57) [Claims] Claims: 1. A surface material for an automobile interior in which a skin material (2) is adhered and integrated to the surface of a wadding material (1) in which fiber filaments are entangled and integrated by needle sticking, the wading material (1). A number of small protrusions (3) with fiber filament ends protruding on the surface of the surface, and the skin material (2) is provided at the top of the small protrusions (3) and is a point-like bonding portion (4) made of hot melt adhesive A surface material for automobile interiors, which is adhered and integrated with: 2. The surface material for an automobile interior according to claim 1, wherein a surface layer (5) of a high-density nonwoven fabric is laminated on the surface of the fiber filament layer of the wadding material (1).