JP2563735Y2 - Resin panel - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a resin panel containing long glass fibers.

[0002]

2. Description of the Related Art In order to improve the rigidity of a resin panel, it is common practice to mix long glass fibers into the base material of the resin panel. This may impair the appearance of the resin panel.

Therefore, as disclosed in Japanese Patent Application Laid-Open No. 3-99812, the surface of a substrate containing long glass fibers is
There has been proposed a resin panel in which a separately formed resin layer containing no long glass fiber is integrated by compression molding.

[0004]

However, in the above-mentioned resin panel, after a base material containing long glass fibers and a resin layer not containing long glass fibers are separately formed,
Since both must be integrated by compression molding,
There is a problem that the manufacturing process becomes complicated.

In view of the above, an object of the present invention is to make it possible to obtain a resin panel in which long glass fibers are not exposed on the surface by a simple manufacturing method.

[0006]

Means for Solving the Problems In order to achieve the above object, the present invention relates to a resin panel having a squeezed pattern on its surface. They have found that the fibers are not exposed on the surface of the base material of the resin panel, and have been made based on this finding.Specifically, press molding a thermoplastic resin containing long glass fibers The pitch of the valleys constituting the squeezed pattern is set within 3 mm and the depth of the valleys is set to 50 μm or more. Things.

[0007]

According to the above arrangement, the pitch of the valleys forming the drawn pattern is set within 3 mm and the depth of the valleys is 5 mm.
Since it is set to 0 μm or more, the pitch of the projections provided on the cavity surface of the mold is within 3 mm and the height of the projections is 50 μm or more. For this reason, the long glass fibers contained in the thermoplastic resin are pressed by the protrusions on the cavity surface and are located inside the cavity and do not abut against the cavity surface. Does not appear on the surface.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an enlarged view of a part of the surface of a resin panel A according to an embodiment of the present invention. The resin panel A of the present invention is made of a thermoplastic resin containing long glass fibers. It is obtained by press molding. On the surface of the resin panel A, a squeezed pattern in which the pitch p of the troughs 10 is within 3 mm and the depth of the troughs 10 is 50 μm or more is formed.

FIG. 2 is a sectional view of a molding die 12 for molding the resin panel A, and FIG. 3 is an enlarged view of a dashed line portion in FIG.

The molding die 12 is composed of a lower die 14 and an upper die 16, and the cavity surface of the lower die has a height corresponding to the drawing pattern of the resin panel A of 50 μm or more and a pitch of 3 mm or less. Are provided. Therefore, when the cavity of the mold 18 is filled with the thermoplastic resin 22 containing the long glass fiber 20 and press-molded, the pitch of the valley portions 10 is within 3 mm in the obtained resin panel A as described above. Thus, a squeezed pattern in which the depth of the valley portion 10 is 50 μm or more is formed.

Hereinafter, the grounds for setting the pitch of the valleys 10 constituting the drawn pattern to within 3 mm and the depth of the valleys 10 to 50 μm or more will be described.

First, the pitch of the valley portion 10 of the drawn pattern is 3 m
If it exceeds m, the aesthetic appearance of the squeezed pattern will be significantly impaired,
The pitch of the valley portion 10 of the drawn pattern is set within 3 mm.

FIG. 4 shows that the length of the glass fiber 2 of 10 mm in length is added to the thermoplastic resin by changing the depth of the valley portion 10 of the drawn pattern.
0, length 50mm long glass fiber 20, length 100mm
Shows the result of molding a resin panel by mixing the long glass fibers 20, respectively. In the same figure, the mark ○ indicates the case where the long glass fiber 20 does not appear on the surface and the appearance is good, and the mark × indicates the long This shows a case where the glass fiber 20 appears on the surface and the appearance is poor. In addition, the pitch of the valley portion 10 of the squeezed pattern is set to 3 mm, which is the upper limit capable of securing the beautiful appearance of the squeezed pattern. A polypropylene resin was used as the thermoplastic resin 22, and the long glass fiber 20 used had a wire diameter of 10 μm. As is apparent from FIG.
When the length is 100 mm, the depth of the valley 10 is 30
The long glass fiber 20 did not appear on the surface regardless of whether it was μm or 50 μm. When the length of the long glass fiber 20 is 50 mm, when the depth of the valley portion 10 is 30 μm, the long glass fiber 20 appears on the surface.
The long glass fiber 20 did not appear on the surface when the depth 0 was any of 50, 80 and 100 μm. further,
When the length of the long glass fiber 20 was 10 mm, the long glass fiber 20 appeared on the surface when the depth of the valley portion 10 was 30, 50, 80, or 100 μm. Considering this result and the fact that the length of the long glass fiber 20 is usually 50 mm or more, the depth of the valley portion 10 is set to 50 μm.
With the above setting, the long glass fibers 20 do not appear on the surface of the resin panel A, and the appearance is good.

[0015]

As described above, according to the resin panel of the present invention, the pitch of the valleys constituting the drawn pattern is set within 3 mm and the depth of the valleys is set to 50 μm or more. Since the long glass fibers contained in the thermoplastic resin are pressed by the projections on the cavity surface of the mold and do not come into contact with the cavity surface of the mold, the long glass fibers do not appear on the surface of the resin panel after molding. .

Therefore, according to the present invention, a resin panel in which long glass fibers are not exposed on the surface can be obtained by a simple manufacturing method.

[Brief description of the drawings]

FIG. 1 is a partially enlarged view of a surface of a resin panel according to an embodiment of the present invention.

FIG. 2 is a sectional view of a mold for molding the resin panel.

FIG. 3 is an enlarged view of a dashed line in FIG. 2;

FIG. 4 is a characteristic diagram showing the influence of the depth of the valley portion of the drawn pattern and the length of the long glass fiber on the appearance of the surface of the resin panel.

[Explanation of symbols]

 A Resin panel 10 Valley portion 14 Lower mold 16 Upper mold 18 Projection 20 Long glass fiber 22 Thermoplastic resin

Claims (1)

(57) [Scope of request for utility model registration] 1. A resin panel obtained by press-molding a thermoplastic resin containing long glass fibers and having a drawn pattern on the surface, wherein the pitch of the valleys constituting the drawn pattern is set to within 3 mm. And the depth of the valley is 5
A resin panel, wherein the thickness is set to 0 μm or more.