JPS58131057A - Manufacture of laminated interior finish material for automobile - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The purpose of the invention is to provide not only flame retardancy and moisture resistance in terms of quantity and advantages as a pond interior material, but also an excellent molding material. A) A method for easily manufacturing an interior material having moldability and shape retention after molding is provided.

Conventionally, this type of interior material has been manufactured by heating and pressurizing molding fiberboard impregnated with a synthetic resin, etc., or felt impregnated with thunol resin. The material sometimes lacks flame retardancy and moisture resistance, has a large in. In addition, it has the disadvantage that it has poor moldability and is not easy to manufacture.

The present invention is a manufacturing method that has many advantages and can easily manufacture laminated interior materials for automobiles, which eliminates the above-mentioned drawbacks.

The laminated material according to the manufacturing method of the present invention will be described in detail below with reference to a drawing showing an example of its structure.

First, in the embodiment shown in FIG. 3, a hollow portion 16a is formed using a relatively thin paper material impregnated with a thermosetting synthetic resin, and relatively thick paper materials 11a are formed on both sides of the hollow portion 16a.
A paper material 10a is formed by laminating the paper material 10a, and its surface is coated with a highly adhesive liquid such as a copolymer of vinyl chloride and vinyl acetate, preferably with a heat-sealable adhesive. After forming the dry film 14a, or before it becomes a dry film, a first surface layer 15a made of a woven fabric or non-woven fabric which is made relatively flexible and has heat insulating properties by interposing these adhesives is placed. This is a method for manufacturing a laminate material 17, which is an automobile interior material, by integrally molding such a laminate structure by heating and pressing.

As mentioned above, the base layer 10, which is the paper layer 10a in which the hollow part 16 is formed by the ribs n, is impregnated with a thermosetting synthetic resin.The several base layers 10 are considerably lightweight, and the shape retention performance of the base layer after the manufacturing process is It is large in size and has some degree of flame retardancy and moisture resistance due to the hardening of the resin.

After lightening the processing steps as an interior material, the synthetic resin adhesive 14a interposed on the surface of the base layer or the laminated material 17a has the effect of improving moisture resistance. When this manufacturing is carried out, as mentioned above, the nonwoven fabric 15a etc. is polymerized on the base layer of the hollow structure via the synthetic resin layer 14a with low thermal conductivity, and this is heated and press-molded, so the manufactured interior material is The laminated material 17Ji not only has heat insulating properties due to the hollow structure of the paper base material 10a, but also has high heat insulating properties and sound absorbing properties due to the soft porous surface of the woven fabric or non-woven fabric 15a.

In addition, when the laminated material 17a configured as described above is subjected to the required pressing or the like and then manufactured into a molded product having a desired uneven shape as shown in FIGS. 1 and 2, at least the first surface layer is flexible. Since the laminated material is made of woven fabric or non-woven fabric 15a, the mold surface for molding has little friction and is easy to slip, so even complicated shapes can be molded easily. Then, when producing a molded product, a predetermined heat and pressure is applied to condense and harden the thermosetting synthetic resin impregnated into the base layer.

At this time, the condensed water temporarily lowers the properties of the base layer paper, so when forming a curved surface, it is easy to stretch the outer paper 9P, a and compress the inner paper ua', or vice versa. This has the advantage of improving the efficiency of a given pressure press molding operation.

Since the heat-sealing adhesive is made into a dry film or a state close to a dry film, there is no need to prevent adhesion of the adhesive to outside the designated parts due to the adhesive oozing out or contamination due to oozing out, and there is no need to prevent the adhesive from oozing out or contaminating the parts before and during pressing. The work is easy, and since the adhesive is in the form of a film, heating and pressure is not applied during molding, so that the heat-sealing adhesive film 14a reliably exhibits its effect, and is made of the base layer 10a and woven fabric. Perfect adhesion with the first surface layer 15a.

Furthermore, since the heat-sealing adhesive 14a is used, a sufficient adhesive effect can be obtained without intentionally applying cooling.

Another embodiment of the present invention is based on the corrugated cross-sectional rib 12a of the base layer 10a in the first embodiment described above, and as shown in FIG. A paper partition wall 12 that divides the front and back plate-like paper materials
This is a method of manufacturing an interior material for an automobile having a structure in which the ridges h are provided at appropriate intervals in parallel in one direction as shown in 12b of FIG. 5, or in a honeycomb shape as in the third embodiment shown in FIG. 6 12c.

Laminated material 17bO'li of the second embodiment shown in FIG.
Since the partition wall material [b that maintains the shape of the hollow part 16b of the M lab has a structure that is perpendicular to both surfaces of the substrate, it has the advantage that the strength of the base layer 106 is lower than that of the laminated material 17a of the first embodiment. In the case of the honeycomb-shaped partition wall material 12c as shown in the third embodiment shown in the special Kme diagram, there is no directionality in strength, so it is light:
It is a laminated material 17a that is strong against aging.

As mentioned above, the present invention uses both plate-like paper materials 11 as front and back materials.
・The base layer 10 is made of a hollow structured paper material, in which the space 111 is divided into hollow parts 16 by ribs or partitions U that intersect with the front and back materials, and at least the paper forming the ribs or partitions is made of thermosetting synthetic resin. A heat-sealable adhesive layer 14 was formed on the surface of the base layer before the resin dried and hardened, and a surface layer such as a nonwoven fabric was polymerized to the base layer through the layer. This manufacturing method is carried out because it is a method for manufacturing laminated interior materials for automobiles, which is characterized by applying a predetermined heat and pressure to form a single piece, and curing the synthetic resin to maintain a predetermined shape. When molding is done, heating and pressure press molding is easy, and the laminated interior material for automobiles after molding is not only lightweight and relatively flame retardant and moisture resistant as described above, but also has considerable heat insulation and sound absorption properties. It is possible to produce a laminated interior material for automobiles which has many advantages, such as having properties such as properties, and having many advantages such as being easy to fit into a mold during molding and having good shape retention after molding. In short, the base layer 17 has a hollow portion 16 with ribs or partition materials fixed thereon.
It is formed by impregnating thermosetting synthetic resin and curing it, and forms a nonwoven fabric with a heat-sealable adhesive layer between it and the base layer on the surface, and has both flexibility and heat insulation properties. That's fine.

Note that the step of heating the thermosetting synthetic resin impregnated into the hollow structure paper material 10 to complete curing and thereby imparting sufficient shape retention to the laminated material 17 is not necessarily carried out during press molding. It is not necessary to completely complete curing by determining it only during heating and pressurization and during cooling in that process, and it may be supplemented in the next process.

[Brief explanation of the drawing]

Figure 1 shows a molded product using the automobile interior material according to the present invention, Figure 2 is a sectional view of Figure 1, Figures 3 and 4.
Each figure shows a cross-section N of a laminated material as an interior material for an automobile according to the present invention, and FIG. 5 is a plan view of a portion of the laminated material shown in FIG. FIG. 3 is a partially cutaway plan view of the laminated material. 10=hollow structure paper base material or base layer, 11-plate-like paper material, 12, 9 boards or partitions, low addition layer, 14=adhesive layer, b=single surface layer, 16=hollow part, 17-laminated material. E 2 Illustration 3j

Claims (1)

[Claims] The space between both the plate-like paper materials 11 and 11' as the front and back materials is used as a base layer 10 of a hollow structure paper material, which is held as a hollow part 16 divided by a rib material or a partition wall 12 that intersects with the front and back materials, and at least the rib material Alternatively, the paper material forming the partition walls is impregnated with a thermosetting synthetic resin, and a heat-sealable adhesive layer 14 is formed on the surface of the base layer before the υj fat is dried and hardened, and the A laminated interior material for automobiles, characterized in that after a surface layer 15 of nonwoven fabric or the like is polymerized with respect to a base layer, a predetermined heat and pressure is applied to integrate the base layer and the thermosetting synthetic resin is cured to form a predetermined structure. manufacturing method.