JPH06170973A - 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 obtained by laminating long metal foils on the upper and/or rear surface of a required number of long resin impregnated base materials is slid and transferred on bearing balls to be subjected to continuous non-pressure 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 manufacturing method has a continuous process of impregnating a substrate, laminating, and curing a resin, and laminating by resin outflow from both ends of the resin-impregnated substrate. Support rolls are minimized to avoid sticking between the underside of the body and the manufacturing equipment. For this reason, internal strain is generated during continuous transfer of the laminated body, and the laminated body is made into a laminated body with the strain being built in, so that the laminated plate is warped and twisted after the laminated molding, and the dimensional stability is deteriorated.

[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]

The present invention provides a long base material,
A long laminate laminated with a long metal foil on the upper surface and / or lower surface of a required number of resin-impregnated long resin-impregnated base materials is continuously pressureless slid on a bearing ball to be transferred and laminated. Since the method for manufacturing a laminated plate is characterized by cutting into a required size, the laminated body can be formed into a laminated body without causing internal strain, so that a laminated board having no warp or twist can be obtained. is there. 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 sulphide, polyphenylene oxide, woven fabrics made of organic fibers such as fluororesin and natural fibers such as cotton, non-woven fabrics, papers, etc. are used together. It is also possible to use a composite structure in which the core portion is made of glass nonwoven fabric and the surface portion 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. Corresponding to talc, clay, calcium carbonate, aluminum hydroxide, inorganic powder filler such as silica, glass fiber,
Fibrous fillers such as asbestos fibers, pulp fibers, synthetic fibers and ceramic fibers can be added. 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 impregnated with a resin by any means such as single-sided impregnation or whole surface impregnation to obtain a long-length 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 the long metal foil, copper, aluminum, brass, nickel, iron, etc. alone, alloy, or composite foil is used.
An adhesive layer can be provided on one side of the metal foil if necessary. Thus, on the upper surface and / or the lower surface of the long resin-impregnated base material, a long laminated body obtained by laminating the long metal foil is pressurelessly slid on the bearing balls to be formed by lamination molding. It is preferable to obtain a laminate by sliding on a bearing ball made of a release resin such as a resin or a fluororesin or a ball coated with a release resin to form a laminated molded body.
The bearing ball size and the number of installations are arbitrary, but the larger the number of installations, the more preferable. In the pressureless lamination molding integration of the long laminate, 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 preferably 130 to 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. Reheating is the glass transition point (T
g) It is desirable to heat to the above temperature or more, and the rapid cooling after reheating is performed by cooling in a liquid such as low temperature water or alcohol, or in a low temperature gas to quench, and preferably in water at 25 ° C. or lower. 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) impregnated with a resin amount of 45% to a long vinyl ester resin-impregnated glass non-woven fabric substrate, and a long glass woven cloth having a thickness of 0.15 mm and a width of 105 cm, and a vinyl ester. Resin (manufactured by Showa High Polymer Co., Ltd., product number R806-DA) was impregnated so that the amount of the resin was 45%. After transferring two long vinyl ester resin-impregnated glass woven fabric substrates, laminating and Width 1 above and below
A long laminate laminated with a long copper foil of 05 cm and a thickness of 0.035 mm is pressureless, and is slid on a ball provided with a large number of bearing balls coated with a fluorine resin to move at 170 ° C. After laminating continuously for 1 minute, cut into 100 cm square with a cutter and thickness 1.2 mm
The laminated plate of was obtained continuously.

[0007]

[Comparative Example] A laminated plate having a thickness of 1.2 mm was continuously obtained in the same manner as in Example except that the same long-sized laminate as in Example was supported by a support roll and transferred at intervals of 2 m. It was

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 (2)

[Claims] 1. A long-sized laminated body in which a long-sized metal foil is laminated on the upper surface and / or the lower surface of a required number of long-sized resin-impregnated base materials impregnated with a resin on a long-length base material, continuously without pressure. A method for producing a laminated plate, comprising the steps of sliding on a ball, laminating and molding, and then cutting to a required size. 2. The method for manufacturing a laminated board according to claim 1, wherein the bearing balls are releasable.