JPH06170968A - 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 surface of a required number of long resin impregnated base materials at an acute angle of 90 deg. or less in an advance direction is formed by non-pressure continuous laminate molding and cut into required dimension 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 is a continuous laminated plate obtained by laminating a long metal foil on the surface at an obtuse angle exceeding 90 degrees in the traveling direction. Since it is laminated and formed, unreasonable force is applied to the long metal foil, and it is laminated with the built-in distortion, so the laminated plate warps and twists after lamination forming, reducing dimensional stability. It was

[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]

SUMMARY OF THE INVENTION The present invention is a long laminate in which a long number of long resin-impregnated base materials are laminated with a long metal foil on the upper surface and / or the lower surface at an acute angle of 90 degrees or less in the traveling direction. Due to the method of manufacturing a laminated plate, which is characterized in that the body is continuously pressure-free laminated and formed, and then cut into a required size, the metal foil is laminated without distortion and the metal foil is corrugated. It is possible to obtain a laminated plate which is not in a state and is free from warpage and twist. The present invention will be described in detail below.

The long resin-impregnated base material used in the present invention includes inorganic fibers such as glass, ceramics and asbestos, vinyl alcohol, polyimide, polyethylene terephthalate, polybutylene terephthalate, polyamide, polyphenylene sulfide, Woven cloth, non-woven cloth, paper and the like made of organic fibers such as polyphenylene oxide and fluororesin and natural fibers such as cotton can be used together. The constituent position may be, for example, a composite structure in which the core portion is a glass non-woven fabric substrate and the surface portion is a 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 is changed to a low viscosity resin.
The secondary impregnation may be an impregnation with a higher viscosity resin, or a plurality of impregnations such as a primary impregnation and a secondary impregnation with a crosslinking agent or a heterogeneous resin may be performed to make the impregnation more uniform. Thus, the long base material is impregnated with resin to obtain a long resin-impregnated base material. The required number of long resin-impregnated base materials can be used according to the required thickness of the laminated plate. As long metal foil, copper, aluminum, brass, nickel,
A single metal such as iron, an alloy, or a composite foil is used, and an adhesive layer can be provided on one surface of the metal foil if necessary. Thus, a long laminate in which the long metal foil is laminated on the upper surface and / or the lower surface of the long resin-impregnated base material at an acute angle of 90 degrees or less in the traveling direction is laminated without pressure and formed into a body to obtain a laminated plate. Is what you get. When the laminating angle between the resin-impregnated base material and the metal foil exceeds 90 degrees, internal strain is generated in the metal foil, and the laminated plate is warped and twisted. Pressure-free lamination molding integration of long laminates is made by resin, substrate, thickness, etc., curing time,
The curing temperature can be selected, but the curing temperature is 130
It is desirable that the temperature is 200 ° C. After the laminated molding, the laminated plate is obtained by cutting it 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,
Quenching after reheating is performed with low-temperature water, liquid such as alcohol,
It is placed in a low-temperature gas and rapidly cooled, and it is preferably placed in water at 25 ° C or lower. The present invention will be described below based on examples.

[0006]

Example 1 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) a long vinyl ester resin-impregnated glass nonwoven fabric substrate impregnated with a resin amount of 45%, and a long length glass woven cloth having a thickness of 0.15 mm and a width of 105 cm, and a vinyl ester resin ( Showa High Polymer Co., Ltd., product number R
(806-DA) impregnated with a resin amount of 45% so that two long-length vinyl ester resin-impregnated glass woven fabric substrates are laminated on each other, and the upper and lower surfaces thereof have a width of 105 cm and a thickness of 0.035.
mm long copper foil is laminated at an angle of 60 degrees toward the traveling direction to form a long laminate continuously at 170 ° C. for 20 minutes without pressure and then cut into 100 cm squares with a cutter to have a thickness of 1 A 0.2 mm laminated plate was continuously obtained.

[0007]

Example 2 A laminated plate having a thickness of 1.2 mm was continuously obtained by the same process as in Example 1 except that the laminating angle between the resin-impregnated base material and the metal foil was set to 30 degrees.

[0008]

[Comparative Example] A laminated plate having a thickness of 1.2 mm was continuously obtained by the same process as in Example 1 except that the laminating angle between the resin-impregnated base material and the metal foil was 120 degrees.

Warpage of the laminated plates of Examples 1 and 2 and Comparative Example,
The twist is as shown in Table 1.

[0010]

[Table 1]

[0011]

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 continuous laminate in which a required number of long resin-impregnated base materials are laminated with a long metal foil on the upper surface and / or the lower surface at an acute angle of 90 ° or less in the traveling direction, without pressure. A method for manufacturing a laminated board, which comprises laminating and forming the laminated sheet with a sheet, and then cutting the sheet to a required size.