JPS5857935A - Laminated board - 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 present invention relates to a laminate, and more particularly, to a laminate that prevents the generation of dust from the edges of the laminate.

Figure 1 shows an example of conventional steel clad laminated aluminum.
The board 1 is a woven fabric 4f obtained by weaving longitudinal fibers 2 and transverse fibers 3. After immersing this woven fabric in a t-face and drying it, a prepreg 4 is obtained, and several sheets of this prepreg are prepared. It is formed by placing two copper foils 5 and 6 one above the other and applying pressure.

In such a laminate, the fItIIA direction of the longitudinal fibers 2 and the transverse fibers 3 is perpendicular or parallel to the end surface of the laminate. In a laminate with such a fiber arrangement,
In particular, at the edges, the fibers that are parallel to the end surface of the laminate are no longer restrained, and even a slight contact causes the fibers to separate from the laminate, resulting in a crack. In particular, aromatic polyamide fibers are characterized by high specific strength. As shown in the figure, either one of the fibers that intersects with the end face of the laminate is parallel to the end of the laminate, so the parallel fibers near the edge are unrestrained, and as a result, even slight vibrations or contact occur. Textile waste is easily separated.

An object of the present invention is to provide fibers generated from the ends of the laminate in a laminate formed by laminating a predetermined number of prepregs obtained by impregnating a woven fabric containing at least aromatic polyamide fibers with a resin and molding them under heat and pressure. The purpose of the present invention is to provide a laminated board that reduces waste.

The present invention is characterized in that the fiber direction KL7' of each of the intersecting fibers of the woven fabric comprising at least aromatic polyamide fibers has an angle of 3° to 87° with the end surface of the laminate. It's a thing.

Hereinafter, one embodiment of the laminate of the present invention will be described with reference to FIGS. 3 to 8.

In FIG. 3, both the longitudinal fibers 7 and the transverse fibers 8 are aromatic polyand fibers, and a typical example of the aromatic polyamide fibers is poly-p-phenylene tele 7.
Examples include talamide fibers and poly-P-benzamide fibers. A composite system was created by twisting this aromatic polyand fiber, and the woven fabric made by twisting this was immersed in a cloth for 16 days.
Prepreg 9 was obtained by drying at 0C for 5 minutes.

Next, several sheets of this prepreg and two sheets of 10.degree. 11 copper foil were placed one above the other and pressed at 170C for 60 minutes to obtain a copper-clad laminate plate.

The longitudinal fibers 7 and the transverse fibers 8 intersect in the woven fabric.
The angle θ that the fiber direction makes with the end surface of the laminate.

0! are not perpendicular or parallel, but are each in the range of 3° to 87°.

By forming the fibers so that the fiber directions of the longitudinal and transverse fibers 7.8 have an angle of 1 ft with the end face of the laminate, generation of fiber waste can be prevented.

In the above-mentioned example, the woven fabric was made from aromatic polyamide fibers, but the same method can be applied to a composite ta-weave fabric made by twisting a mixture of aromatic polyamide fibers and glass fibers.

FIG. 4 shows the end face of the laminate of the present invention, with copper foil 10
.
The fibers are not parallel to the end face, so the fibers are fixed in the prepreg and the generation of fiber waste is suppressed.

Figure 5 shows a laminate in which the fiber angles of one prepreg 9 and the prepreg 9' immediately below it are different among the prepregs in the laminate. can be prevented.

Note that in the above-described embodiment, only a double-sided copper-iron laminate was explained, but it is also possible to use a multi-layered board.

FIG. 6 shows a prepreg 9 obtained by impregnating a woven fabric T-face made of aromatic polyamide fibers or aromatic polyamide fibers and glass fibers, and a prepreg 9'' made only of glass fibers. They are laminated, and in this way the coefficient of thermal expansion in one plate thickness direction can be controlled.

As described above, according to the present invention, it is possible to reduce the amount of fiber waste generated from the ends of the laminate.

[Brief explanation of the drawing]

Figures 1 and 2 show conventional laminates.
The figure is a diagonal diagram showing an example of a laminated structure, FIG. 2 is a perspective view of an end face of a laminated plate, FIGS. 3 to 6 show an embodiment of a laminated plate of the present invention, and FIG. FIG. 4 is a perspective view of an end face of the laminated plate shown in FIG. 183, and FIGS. 5 and 886 are perspective views showing other examples of the laminated structure. 7... Longitudinal fiber, 8... Horizontal fiber, 9... Prepreg, 10.11... Steel foil. YI+ Figure 2nd mouth 4th mouth//') ￥J 5 Figure 4-' Munin lθ

Claims (1)

[Scope of Claims] L A laminate formed by laminating a predetermined number of prepregs obtained by impregnating a woven fabric containing at least aromatic boria-doped fibers with a resin and molding them under heat and pressure. A laminate plate having a fiber direction such that each fiber direction of the intersecting fibers of the cloth has an angle W7t of 3° to 87° with the facing surface of the laminate plate. 2. The laminate according to claim 1, characterized in that the woven fabric (t1) is woven only from aromatic polyand fibers. & Woven fabric t1 Composite system t-1I &! Woven fabric t-1I &! A laminate according to claim 8, characterized in that the length is T. L Woven fabric, aromatic polyand fiber and glass fiber mt
- The laminate according to claim 1, characterized in that the fibers are mixed. & Pre-preg obtained by impregnating resin into a woven cloth made by twisting a mixture of polyand fiber and glass fiber and weaving a nine composite system, and a pre-preg obtained by weaving glass fiber and impregnating a nine-woven fabric with tree f11t- in a predetermined number. The laminate according to claim 11s1, characterized in that the laminate is laminated and molded under heat and pressure.