JP3080298B2 - Skin material for vehicle decoration - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative material for a vehicle.

[0002]

2. Description of the Related Art As shown in FIG. 6, there is a door trim 10 of a vehicle in which a decorative skin material 13 is partially or entirely mounted on a surface of a door trim body 11. As shown in FIG. As a method for mounting the decorative sheet 13 as a decorative skin material, the following method described in Japanese Patent Application Laid-Open No. 4-341823 is known.

That is, as shown in FIG. 7, a door trim main body 11 is set on an upper mold 1 for crimping, and a decorative sheet 13 previously trimmed to a required shape in a lower mold 2 for crimping is positioned by a guide member 3. Set in the state that was done. A wood grain bar 4 for graining the periphery of the decorative sheet 13 is fixed to the base 2 a of the lower mold 2 between the crimping lower mold 2 and the guide member 3. After setting the decorative sheet 13 in the lower mold 2, the upper mold 1 for crimping descends and is clamped to the lower mold 2 for crimping. With this clamping, the decorative sheet 13 is crimped to the center portion of the door trim main body 11. Be integrated. At the same time, the wood grain bar 4 presses the peripheral edge 13a of the decorative sheet 13 into the wood grain groove 16 provided in the door trim main body 11 to perform wood grain processing.

[0004] Conventionally, fabrics such as woven fabrics and knitted fabrics have been mainly used as the decorative sheet 13, but use of the nonwoven fabric 14 has been studied in view of recent cost reduction demands. Disadvantages of the nonwoven fabric 14 include a small number of design variations due to a single structure (simplicity) and a problem of wear resistance. As a countermeasure, as shown in FIG. 8, a plate roll-shaped nonwoven fabric 14 made by needle punching or the like is subjected to stitching with a stitch thread 15 and a knitting needle 18 to add a design property, and then subjected to a resin 9 process to withstand. There is a method of giving abrasion. Thereby, the design and abrasion resistance close to the cloth can be obtained by manipulating the color and stitch pattern of the stitch yarn 15.

[0005]

By the way, the door trim main body 11 has a PVC skin 1 on the surface of wood or resin core material.
In general, a laminated product of the foam 2a and the foam 12b is formed and adhered. The wood-groove groove 16 is such that the terminal 13a is not visible after the wood-graining treatment of the decorative sheet 13 and the groove 16 can be formed as shown in FIG. ).

However, the shape of the actually formed wood grain groove 16 changes as shown in FIG. That is, in the section A section and the section B section in FIG.
The dimensions of the tip and the middle of the foam 12
The groove width is reduced to about 60% by the restoration of b.
Since the restoration rate is not constant due to variations due to materials, variations due to product parts, etc., it is impossible to form a mold with the expected shape of the groove 16. Also, when the decorative sheet 13 is grained into the narrowed wood groove 16, the wood grain bar 4 is also inserted into the groove 16 at the same time as shown in FIG. A frictional shear force is applied, which may cause thread breakage or thread breakage, resulting in poor appearance.

Furthermore, the thickness of the decorative sheet 13 cannot be easily changed in terms of design and durability, and it is difficult to reduce the thickness of the wood grain bar 4 from the viewpoint of durability. Further, the width of the wood grain groove 16 also has a restriction that it cannot be simply expanded from the viewpoint of appearance and quality.

An object of the present invention is to solve the above-mentioned conventional problems, and it is an object of the present invention to provide a decorative material for a vehicle which has improved tensile strength and does not cause thread breakage or thread dropout.

[0009]

In order to achieve this object, a decorative material for a vehicle according to the present invention is decorated with a stitch thread, is formed and adhered to an interior member of the vehicle, and has a peripheral edge defined as described above. It has a configuration in which a nonwoven fabric subjected to a grain-graining treatment on an interior member is impregnated with a resin having an adhesion amount of 15 to 50 g / m ² .

Here, the decorative skin material of the vehicle has a non-woven fabric subjected to stitching and a resin impregnation for preventing the progress of thread breakage of the stitch yarn generated during the graining treatment. As the impregnation method, a method by coating, spray impregnation, immersion, or the like can be applied. Among them,
Immersion is preferred from the viewpoint of preventing yarn breakage. Further, as the impregnating resin, for example, a polyurethane resin, an acrylic resin, or the like can be applied. The tensile strength and the amount of the impregnated resin, which are the yarn breaking substitute properties, have a correlation. The larger the amount of the resin adhered, the more the yarn breaking prevention effect. However, from the viewpoint of surface texture, elongation, processability, and cost, 15 to 50 g. / M ^2, especially 20-30 g /
m ² is preferred.

Further, since the surface stitch yarn is bonded to the non-woven fabric only by the impregnating resin, there is a risk that the stitch yarn may be peeled off in the cutting, processing and durability tests. An appropriate stitch pitch is set.

[0012] Thus, even if frictional shearing force is applied to the surface of the non-woven fabric having the stitch yarns to be wood-grained by the wood-grained bar, the tensile strength of the non-woven fabric is sufficient even if the width of the wood-groove groove of the door trim body varies and the width of the wood-groove groove is narrow. Therefore, poor appearance such as thread breakage, which is a problem in design, does not occur.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION

(Embodiment 1) Hereinafter, an embodiment of the present invention will be described.
This will be described with reference to the drawings.

As shown in FIGS. 1 and 2, as a decorative sheet (decorative skin material) 13 to be attached to a door trim body 11 of a door trim 10 of a vehicle, a nonwoven fabric 14 made by a needle punch or the like is subjected to stitch processing. Add design,
The nonwoven fabric 14 is processed with a resin to increase the tensile strength. The nonwoven fabric 14 is attached to a part or the whole of the door trim main body 11, and the periphery thereof is grained.

The results of an investigation on the characteristics of stitching and resin processing on the nonwoven fabric 14 will be described below.

The fibers of the needle-punched nonwoven fabric 14 include polyester fibers, nylon fibers, acrylic fibers,
There are synthetic fibers such as polypropylene fibers,
In 4, these fibers may be used alone, or two or more kinds may be used in combination. Particularly, polyester fibers can be suitably used because they have little heat deterioration and color change at high temperature and are excellent in heat resistance, weather resistance and antifouling properties. It is said that the fineness of these fibers is preferably 6 deniers or less in order to obtain a decorative sheet 13 having a uniform smooth surface.

As a result of examining the basis weight of the needle-punched non-woven fabric 14 obtained by needling the fiber web, when the basis weight is less than 100 g / m ² , the commercial properties, cushioning properties, etc. are deteriorated. , Again 400g
If it exceeds / m ² , the weight is large, the processability such as elongation and hardness is reduced, and the raw material cost tends to increase.
Therefore, the basis weight is usually 100 to 400 g /
m ² inter alia preferably adjusted to 200-30Og / m ^2.

Since the surface stitch yarn 15 is joined to the nonwoven fabric 14 only by the impregnated resin described later except for the stitches, the cutting, processing and durability tests show the stitch yarn 15 as shown in FIG. The terminal 15a may be peeled off. For this reason, it is necessary to set the stitch pitch p within a range that does not cause a problem in appearance in the wood grain groove 16. In this case, the pitch p is set to 1 to 3 mm.

Further, the nonwoven fabric 14 needs to be impregnated with a resin in order to prevent the progress of the thread break 15b as shown in FIG. Examples of the impregnation method include coating, spray impregnation, and immersion, and immersion is effective in preventing the above-described yarn breakage.
As the impregnating resin, for example, a polyurethane resin, an acrylic resin, or the like is applied.

Further, as shown in FIG. 4, there is a correlation between the tensile strength (at the time of yarn breakage), which is a yarn breakage substitute characteristic, and the amount of impregnated resin. Fineness 3 in terms of surface texture, elongation, workability, and cost
In denier, 15 to 50 g / m ^2, especially 20
It is preferably ３０30 g / m ² .

As described above, by setting the resin adhering amount of the nonwoven fabric 14 to 15 to 50 g / m ² , the width of the wood groove 16 of the door trim main body 11 varies, and the door trim body 11 is formed to have a narrow width. Even if the frictional shearing force by the wood grain bar 4 acts on the surface of the nonwoven fabric 14, the tensile strength of the nonwoven fabric 14 is sufficient, so that appearance defects such as thread breakage, which is a problem in design, do not occur.

Further, as shown in FIG. 5, a resin 17 is applied by coating on the back side of the nonwoven fabric 14 which has been stitched with the stitch yarn 15, and the pitch of the stitch pattern is changed to change the pitch of the back side to the front side. By making it larger, the stitch yarn 15 and the coating resin 17
Are more firmly fixed. Thus, the effect of preventing the stitch yarn 15 from breaking can be increased while the influence on the surface texture is minimized.

[0023]

As described above, the present invention provides a nonwoven fabric which is decorated with a stitch yarn and is formed and adhered to an interior member of a vehicle, and has a periphery of 15 to 50 g attached to a nonwoven fabric which is grained into the interior member. / M ² resin impregnation, the grain width of the grain of the door trim body varies, and the width is formed narrow. Even if the friction shearing force by the grain bar acts on the surface of the stitched nonwoven fabric to be grained, there is a problem in design. Such poor appearance such as thread breakage does not occur.

[Brief description of the drawings]

FIG. 1 is a perspective view of a door trim equipped with a decorative skin material according to an embodiment of the present invention.

FIG. 2 (a) is a fiber sectional view of the decorative skin material. (B) It is a fiber enlarged view of the decorative skin material.

FIG. 3 (a) Peeling off of stitch yarn of the decorative skin material
It is sectional drawing which shows a state. (B) shows the broken state of the stitch yarn of the decorative skin material.
It is sectional drawing.

FIG. 4 shows the relationship between the tensile strength of the decorative skin material and the amount of impregnated resin.
It is a chart showing a person in charge.

FIG. 5 is a cross-sectional view of a decorative skin material according to another embodiment of the present invention.

FIG. 6 is a perspective view of a door trim equipped with a conventional decorative skin material.

FIG. 7A is a cross-sectional view of the upper and lower dies for crimping of the door trim before mold clamping. (B) It is sectional drawing after the mold clamping of the upper and lower press type | molds of the same door trim.

FIG. 8 is an explanatory view showing a manufacturing process of a conventional decorative skin material.

FIG. 9 (a) is an enlarged cross-sectional view of a conventional woodcut groove of a decorative skin material. (B) It is sectional drawing at the time of the wood graining process of the conventional woodcut groove | channel of the decorative skin material.

FIG. 10 is an evaluation diagram of a groove width of a grain of a conventional decorative skin material .
It is a table .

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Door trim 11 Door trim main body (interior member) 13 Decorative sheet (decorative skin material) 14 Nonwoven fabric 15 Stitch thread

Claims (1)

(57) [Claims] 1. A nonwoven fabric which is decorated with a stitch yarn and is formed and adhered to an interior member of a vehicle, and has a peripheral edge attached to a nonwoven fabric which is grained into the interior member.
^2. A decorative material for a vehicle, which has been impregnated with the resin of ² .