JPS6363697B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a heat insulating interior material in which a foamed synthetic resin layer is integrally attached to the back side of a hard synthetic resin substrate.
A reinforcing rib 2 made of hard synthetic resin located at the center of the back surface of the substrate 1 is simultaneously extruded separately, and in a series of steps following this extrusion molding process, the substrate 1 is extruded separately. This heat insulation is characterized in that the reinforcing ribs 2 are bonded to the reinforcing ribs 2 with a soft synthetic resin or adhesive to integrate the reinforcing ribs 2 to the substrate 1 in the longitudinal direction, and then a foamed synthetic resin layer 5 is loaded on the back surface of the substrate 1. This invention relates to a method for manufacturing interior materials.

Conventionally, in the case of heat insulating interior material A' used for bathroom interior materials, etc., as shown in FIG. It was formed by loading 5. However, in such a conventional example, since the back side of the foamed synthetic resin layer 5 is hollow, the second
As shown in the figure, there was a drawback that a warped dent 6 was formed. In order to prevent this dent 6, it is conceivable to use a heat insulating interior material A'' in which reinforcing ribs 2' are integrally formed on the back surface of the board 1 with the same material as shown in FIG. When integrally molded by extrusion molding or the like, sink marks 7 occur on the surface corresponding to the reinforcing ribs 2', as shown in FIGS. 3 and 4, resulting in an unfavorable appearance.

The present invention has been made in view of the above points, and an object of the present invention is to prevent warping by attaching reinforcing ribs to the back surface side, eliminate the possibility of dents, and furthermore, to prevent the occurrence of dents. The reinforcing ribs are integrated with adhesive to create a beautiful surface without sink marks.
Furthermore, it is an object of the present invention to provide a method for manufacturing a heat insulating interior material that can be easily manufactured by simultaneously extruding a substrate and reinforcing ribs and bonding them in the extrusion process.

The present invention will be explained in detail below with reference to Examples. Reference numeral 1 denotes a substrate made of a hard synthetic resin such as hard polyvinyl chloride, and is composed of a top plate portion 1a and a male fitting portion 1b and a female fitting portion 1c provided on both sides of the top plate portion 1a. ing. A reinforcing rib 2 made of a hard synthetic resin such as hard polyvinyl chloride is arranged approximately at the center of the back surface of the substrate 1, and the reinforcing rib 2 and the back surface of the substrate 1 are made of soft polyvinyl chloride. They are integrated via an adhesive portion X of a soft synthetic resin 3. In molding the substrate 1 with the reinforcing ribs 2, the hard synthetic resin substrate 1 and the reinforcing ribs 2 are simultaneously extruded separately using an extrusion mold, and at the same time, the substrate 1 and the reinforcing ribs are extruded separately. A bonding portion X of a soft synthetic resin 3 is extruded between the substrate 1 and the reinforcing ribs 2, and the substrate 1 and the reinforcing rib 2 are bonded together in the longitudinal direction at the bonding portion X. Then, the sink mark 7 does not occur on the surface of the adhesive 1 due to the adhesion through the adhesive portion X of the soft synthetic resin 3. In this manner, a foamed synthetic resin layer 5 such as foamed polyurethane is loaded on the back surface of the substrate 1 provided with the reinforcing ribs 2, thereby manufacturing the heat insulating interior material A. When a foamed synthetic resin layer 5 such as foamed polyurethane is loaded, the substrate 1, the reinforcing ribs 2, and the foamed synthetic resin layer 5 form an integral structure, so that the reinforcing ribs 2 do not fall down. At this time, if the adhesive part X of the soft synthetic resin 3 is made into a shape that widens toward the substrate 1 as shown in FIG. 6, it will firmly adhere to the substrate 1 and the foamed synthetic resin layer 5 such as foamed polyurethane will easily adhere. , the insulation interior material A becomes stronger.

Further, FIG. 7 shows another embodiment of the description, in which the substrate 1
and reinforcing ribs 2 are integrated at an adhesive portion X such as a hot melt adhesive 4. In molding the substrate 1 with the reinforcing ribs 2 in this way, as shown in FIG. The substrate 1 and reinforcing ribs 2 are simultaneously extruded and molded, and a hot melt adhesive 4 is melted at the end of cooling forming in a series of steps following the extrusion molding step, using a thermal spray gun 1 shown in FIG.
1, dripping is performed according to the molding speed, and the substrate 1
and the reinforcing rib 2 are glued together. Hot melt adhesives used in this case include polyamide adhesives, synthetic rubber adhesives, rubber-modified olefins, nylon/polyester, and polyester adhesives.

As described above, in the present invention, since the reinforcing ribs are provided on the back side of the substrate, there is of course no risk of warping and creating dents, and the reinforcing ribs and the substrate are bonded together via an adhesive such as a soft synthetic resin or adhesive. Since it is integrated, there is no sink mark on the surface of the board and it has the advantage of being aesthetically pleasing.Moreover, the reinforcing ribs are integrated with the board by the foamed synthetic resin layer loaded on the board, and the reinforcing ribs are firmly attached. In addition, the hard synthetic resin substrate and the hard synthetic resin reinforcing rib located at the center of the back surface of the substrate are extruded at the same time while being separated from each other, and this extrusion molding process and the series of steps subsequent to this extrusion molding process are In this step, the reinforcing ribs are bonded to the substrate using soft synthetic resin or adhesive to integrate the reinforcing ribs into the substrate in the longitudinal direction, so the substrate and reinforcing ribs are simultaneously extruded and The substrate and reinforcing ribs can be bonded together in a series of steps following this extrusion molding process, and even if the substrate and reinforcing ribs are formed separately and later integrated, they can be easily manufactured in a continuous process. It has the advantage of being possible.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the conventional example, FIG. 2 is a sectional view showing the drawbacks of the same conventional example, FIG. 3 is a perspective view of another conventional example, and FIG. 4 is an enlarged view of part B in FIG. 3. Fig. 5 is a perspective view of one embodiment of the present invention, Fig. 6 is an enlarged cross-sectional view of the adhesive part of the above, Fig. 7 is a sectional view of another embodiment of the above, and Fig. 8 is a molding of the same substrate. 9 is a perspective view of the above-mentioned spray gun, in which 1 is a substrate, 2 is a reinforcing rib, 3 is a soft synthetic resin, 4 is an adhesive, and 5 is a foamed synthetic resin layer. It is.

Claims (1)

[Claims] 1. A hard synthetic resin substrate and a hard synthetic resin reinforcing rib located at the center of the back surface of the substrate are simultaneously extruded and molded separately, and the above-mentioned separation process is performed from this extrusion molding process to a series of steps following this extrusion molding process. The reinforcing ribs are integrated with the substrate in the longitudinal direction by bonding the extrusion-molded substrate and reinforcing ribs to the substrate with a soft synthetic resin or adhesive, and then a foamed synthetic resin layer is loaded on the back side of the substrate. A method of manufacturing a heat insulating interior material.