JPH0261388B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a seat trim cover in which a concavo-convex pattern corresponding to a pattern such as a quilting pattern is formed on the surface side.

Conventionally, when manufacturing this type of trim cover, the wading material and the skin material, which have been foam-molded to a predetermined thickness, are pasted together using a foamable adhesive, and then pressure is applied in accordance with the uneven pattern. By pressing the wadding material from the skin material side with a heated pressing mold or welder mold having a surface, the wading material is partially depressed to form an uneven pattern on the surface side.

However, in this trim cover, the convex portions with the uneven pattern are merely bulged and formed depending only on the thickness of the wading material. Furthermore, since it is necessary to sufficiently adhere the skin material by deeply clamping the wading material during press molding of the uneven pattern, it is impossible to use a wading material that is too thick. Therefore, this trim cover cannot be formed with a large uneven pattern that bulges out.
The appearance is poor and the soft feeling upon contact cannot be formed to a satisfactory level.

An object of the present invention is to provide an improved method for manufacturing a trim cover for a seat, in which the convex portions of the concavo-convex pattern can be easily formed into large bulges in order to eliminate such drawbacks.

That is, in the method for manufacturing a seat trim cover according to the present invention, a hot-melt foam adhesive is applied or impregnated onto the wading material or the skin material, and the skin material is superimposed on the wadding material via the foam adhesive. The wading material is partially depressed from the skin material side using a pressure roll to form an uneven pattern on the surface side, and the convex parts of the uneven pattern are expanded and molded by increasing the wall thickness with foam adhesive. has been done.

The following is a description based on the illustrated embodiments.

In the illustrated embodiment, a wadding material 1 previously formed into a mat shape with a predetermined thickness is continuously fed out, a foamed adhesive 2 is applied to the surface side of the wadding material 1 on the way, and a fabric etc. While paying out the skin material 3, the skin material 3 is overlapped on the surface side of the wading material 1 and pressed with the press roll 4, thereby bonding the skin material 3 to the wading material 1 and making the wading material 1 partially depressed from the skin material side. It is practiced to form a concavo-convex pattern by adding a concavo-convex pattern. Along with forming this uneven pattern, the wading material 1
By increasing the wall thickness 2' by the foamed adhesive 2 interposed between the surface material 3 and the surface material 3, the convex portions having the concavo-convex pattern are formed to be large.

As the foam adhesive 2, a hot melt resin such as polyamide is used as the main ingredient and a nitroso, azo compound, etc. is added as a foaming aid, or a hot melt resin foamed with nitrogen, carbon dioxide, etc. is used. can. The adhesive 2 is applied to the surface of the wading material 1 using a flow coater or the like, and can be formed to increase the amount of convex portions in the uneven pattern as described later. As the wading material 1, a backing material 5 such as a net cloth can be laminated in advance on the back side, and this backing material 5 can be laminated while being drawn out from the back side of the wadding material 1 in the same manner as the skin material. You can also do it. The pressure roll 4 is the second
As shown in Figures a and b, blade-shaped protrusions 4a are provided on the roll circumferential surface according to a pattern of uneven shapes, and as shown in Figures a and b, a plurality of protrusions 4 are provided.
It is possible to use a material in which a concave-convex pattern is formed by partially recessing the wading material 1 by planting b on the roll surface. In addition to adhering the skin material 3 and shaping the uneven pattern at the same time,
After bonding the wading material 1 to the wading material 1, an uneven pattern can be formed separately. In this case, after the skin material 3 is bonded to the wading material 1 using a pressure roll 4 shown in FIG. 1, a pattern may be formed using, for example, a compression roll in which a plurality of discs are coaxially fixed at regular intervals.

When using the foaming adhesive 2 to which a foaming aid has been added, a heating roll is used as the pressure roll 4, and the heating roll partially indents the wading material 1 from the skin material side to form an uneven pattern. At the same time, the foam adhesive 2 can be foamed. Alternatively, the skin material 3 can be laminated to the wadding material 1 using the pressure roll 4 and an uneven pattern formed thereon, and then the material can be foamed by feeding it into a heating furnace.
Furthermore, heat treatment can be performed to initiate foaming at the stage of applying the foaming adhesive 2 or after application and before bonding the skin material 3. Including this case, when a hot melt resin is foamed and applied, the skin material 3 is bonded and an uneven pattern is formed before the adhesive 2 foams and hardens.

Note that, as described above, the foam adhesive 2 is not limited to being applied to the wading material 1; it can also be applied to the skin material 3 by impregnating it in advance, superimposing it on the wading material 1, forming a pattern, and eluting it to adhere to the wading material. It is also possible to perform foaming.

When the seat trim cover is manufactured in this manner, the skin material 3 is pressed by the protruding blades 4a or protrusions 4b, etc. in the concave portions with the uneven pattern, as shown in FIG.
can be joined to the backing material 5 by pressing it near the back side of the wading material 1. As the pressure is applied, a portion of the foamed adhesive 2 present at the shaped portion of the recess can be moved toward the convex portion. As shown in FIG. 5, in the convex portion of the uneven pattern, in addition to the thickness of the wading material 1, the foam adhesive 2 increases the wall thickness by 2', resulting in a larger bulge than that caused by the thickness of the wadding material 1 alone. It becomes possible to form a cushion part with high elasticity.

As described above, according to the method of manufacturing a seat trim cover according to the present invention, the convex portions of the uneven pattern can be formed to be large in size with great ease, and the convex portions can create a luxurious feel and provide a better contact feeling. Can be formed into soft objects.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the manufacturing process of the trim cover according to the present invention, FIGS.
The figure is a sectional view of a trim cover manufactured by the method according to the present invention, and FIG. 5 is a partially enlarged sectional view of the trim cover. 1...wading material, 2...foaming adhesive, 3...
...Skin material.

Claims (1)

[Claims] 1 Apply or impregnate the wading material or skin material with a hot melt foam adhesive, overlay the skin material on the wading material via the foam adhesive, and partially roll the wading material from the skin material side with a pressure roll. By making depressions and forming an uneven pattern on the surface side,
A method for producing a trim cover for a seat, characterized in that the convex portions of the uneven pattern are expanded and molded by increasing the wall thickness using foam adhesive.