JPH06170969A - Production of laminated sheet - Google Patents

Abstract

PURPOSE:To continuously produce a laminated sheet reduced in warpage and distortion under a non-pressure condition. CONSTITUTION:A long laminate wherein long metal foils are laminated to the upper and/or rear surfaces of a required number of long resin impregnted base materials transferred in a horizontal state is formed by non-pressure continuous laminate molding and cut into required dimensions to produce a laminated sheet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to electronic equipment, electric equipment,
The present invention relates to a method for manufacturing a laminated board used for a computer, a communication device and the like.

[0002]

2. Description of the Related Art Conventionally, a laminated plate obtained by a pressureless continuous production method usually has a three-dimensional resin impregnation step up to laminating after resin impregnation of a base material in order to avoid lengthening of the production step. is there. However, if the resin impregnation process is made into a three-dimensional structure, it is possible to avoid lengthening the process, but the base material will be forced into force and laminated with the built-in strain, so the laminated plate will warp and twist after lamination molding. , But the dimensional stability was reduced.

[0003]

As described in the prior art, there is a problem that the laminated plate obtained by the conventional pressureless continuous manufacturing method is apt to cause warp and twisting defects.
The present invention has been made in view of the above-mentioned problems in the prior art, and an object of the present invention is to provide a laminated plate which does not warp or twist by a pressureless continuous manufacturing method.

[0004]

According to the present invention, a long metal foil is laminated on the upper surface and / or the lower surface of a required number of long resin-impregnated base materials which have been horizontally impregnated and then horizontally impregnated with resin. Due to the method for producing a laminated plate, which is characterized by continuously laminating and molding a long laminated body without pressure, and then cutting it to a required size, the base material is laminated without distortion and thus laminated. The body is not in a waving state, and it is possible to obtain a laminated plate free from warping and twisting. The present invention will be described in detail below.

The long base material used in the present invention includes inorganic fibers such as glass, ceramics and asbestos, and vinyl alcohol.
Polyimide, polyethylene terephthalate, polybutylene terephthalate, polyamide, polyphenylene sulfide, polyphenylene oxide, woven cloth made of organic fibers such as fluororesin and natural fibers such as cotton, non-woven fabric, paper, woven cloth, Nonwoven fabric and paper can also be used together. The constituent position may be, for example, a composite structure in which the core part is made of glass nonwoven fabric and the surface part is made of glass cloth. As the resin with which the base material is impregnated, an unsaturated polyester resin, a phenol resin, an epoxy resin, a diallyl phthalate resin, a vinyl ester resin (also referred to as an epoxy acrylate resin) alone resin, a modified resin, or a mixed resin is used. Add inorganic powder filler such as talc, clay, calcium carbonate, aluminum hydroxide, silica, etc., or fiber filler such as glass fiber, asbestos fiber, pulp fiber, synthetic fiber, ceramic fiber, etc. You can Further, the impregnating resin may be impregnated only with the same resin, but the primary impregnation with the same resin may be a low-viscosity resin and the secondary impregnation may be an impregnation with a higher-viscosity resin. Multiple impregnations such as impregnation and secondary impregnation may be performed to make the impregnation more uniform. Thus, the long base material is obtained by impregnating the long base material with any means such as single-sided impregnation or whole surface impregnation to obtain the long base resin-impregnated base material. By moving the resin, the base material is impregnated with the resin in a horizontal state and laminated as it is, no internal strain is generated in the base material. The required number of long resin-impregnated base materials can be used according to the required thickness of the laminated plate. As the long metal foil, a single, alloy, or composite foil of copper, aluminum, brass, nickel, iron or the like is used, and an adhesive layer can be provided on one side of the metal foil if necessary.
Thus, on the upper and / or lower surface of the long resin-impregnated base material,
A long-sized laminated body obtained by laminating the long-sized metal foil is laminated and formed into a body without pressure to obtain a laminated plate. In the pressureless lamination molding integration of a long laminated body, the curing time and the curing temperature can be selected depending on the resin, the base material, the thickness, etc., but the curing temperature is 1
The temperature is preferably 30 to 200 ° C. After lamination molding,
A laminate is obtained by cutting to a required size with a cutter or the like. After cutting, the appearance can be further improved by reheating or rapid cooling if necessary. It is desirable to reheat above the glass transition point (Tg) of the resin, and the quenching after reheating is to put in liquid such as low temperature water or alcohol, or low temperature gas to cool rapidly, and 25 ° C or less. It is preferable to put it in water. The present invention will be described below based on examples.

[0006]

EXAMPLE A vinyl ester resin (manufactured by Showa Polymer Co., Ltd., product number R806) containing 20% by weight (hereinafter simply referred to as "%") of talc in a glass non-woven fabric having a thickness of 1 mm and a width of 105 cm.
-DA) is transferred to one long vinyl ester resin-impregnated glass non-woven fabric substrate impregnated with a resin amount of 45%, and the upper and lower surfaces thereof have a thickness of 0.15 m.
Long glass woven cloth impregnated with vinyl ester resin (manufactured by Showa High Polymer Co., Ltd., product number R806-DA) to a resin content of 45% in a long glass woven cloth of m and 105 cm in width After transferring two substrates in a horizontal state, laminating them and then forming a width 105c on the upper and lower surfaces thereof.
m, 0.035 mm thick copper foil laminated long laminated body continuously without pressure at 170 ° C. for 20 minutes, and then cut into 100 cm square with a cutter to have a thickness of 1.2 mm.
The laminated plate of was obtained continuously.

[0007]

[Comparative Example] After each substrate was impregnated with resin, each resin-impregnated substrate was transferred to a V-shape to shorten the process distance and then laminated, and then processed in the same manner as in Example to obtain a thickness of 1.2 mm. The laminated plate of was obtained continuously.

Table 1 shows the warp and twist of the laminated plates of the examples and comparative examples.

[0009]

[Table 1]

[0010]

The present invention is constructed as described above. In the method for manufacturing a laminated plate having the structure described in the claims, it was confirmed that the obtained laminated plate was able to greatly reduce warpage and twist, and that the present invention was excellent.

Claims (1)

[Claims] 1. A long laminate in which a long metal foil is laminated on the upper surface and / or the lower surface of a required number of long resin-impregnated base materials that have been horizontally transferred after impregnating the long base material with resin. A method for manufacturing a laminated board, which comprises laminating without pressure and then cutting to a required size.