JPH05309758A - Manufacture of laminate - Google Patents

Abstract

PURPOSE:To provide the manufacturing method for a laminate of superior dimension stability and having no warp nor torsion. CONSTITUTION:A continuous laminate with continuous foil of 10-50% elongation at 150-200 deg.C disposed on the upper or lower face of a resin impregnated continuous base is continuously laminate molded under no-pressure, and then cut into the required dimension, and then after-cured at the temperature of glass transition point and quenched in the manufacturing method.

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 laminate obtained by a pressureless continuous production method uses a normal metal foil, that is, a metal foil having an elongation of 1 to 7% at 150 to 200 ° C. Since this metal foil is pressed by the conventional heating and pressurizing method using a press method, the metal foil does not become wavy even by heating and cooling. However, in the pressureless continuous manufacturing method, there is a drawback that the metal foil stretches little even when heated and does not follow because it is not pressed, and the metal foil is in a corrugated state and hardened and fixed as it is, resulting in poor appearance.

[0003]

As described in the prior art, the laminated plate obtained by the conventional pressureless continuous manufacturing method has a problem that a defective appearance is apt to occur. The present invention has been made in view of the above problems in the prior art, the object is to warp in a pressureless continuous manufacturing method,
An object of the present invention is to provide a laminated plate having small twist and good dimensional stability.

[0004]

According to the present invention, a required number of resin-impregnated long base materials are provided on the upper surface and / or lower surface with 150 to 200
After continuously laminating and molding a long laminate having a long metal foil having an elongation at 10 ° C of 10 to 50%, cut it to the required size, and after-sales at a temperature above the glass transition point. Due to the method of manufacturing a laminated plate, which is characterized by rapid cooling after curing, the elongation of the metal foil greatly follows under heating even without pressure, so the metallic foil does not become wavy and has a good appearance. Is what you can get.

The present invention will be described in detail below. The base material of the resin-impregnated long base material used in the present invention is glass, ceramic,
Inorganic fibers such as asbestos, vinyl alcohol, polyimide, polyethylene terephthalate, polybutylene terephthalate, polyamide, polyphenylene sulfide, polyphenylene oxide, woven fabric made of organic fibers such as fluororesin and natural fibers such as cotton, Non-woven fabric, paper, etc. As the resin with which the base material is impregnated, a phenol resin, an epoxy resin, an unsaturated polyester resin, a vinyl ester resin (also referred to as an epoxy acrylate resin) alone, a modified resin or a mixture is used. -, Calcium carbonate, aluminum hydroxide-
Inorganic powder fillers such as silica and silica, and fibrous fillers such as glass fibers, asbestos fibers, pulp fibers, synthetic fibers and ceramic fibers can be added. Furthermore, the 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, and the primary impregnation with a crosslinking agent or a heterogeneous resin. It is also possible to make the impregnation more uniform so as to make the impregnation more uniform, such as secondary impregnation. Thus, the base material is impregnated with the resin to obtain the resin-impregnated base material. The required number of resin-impregnated base materials can be used according to the required laminate thickness, and woven cloth, non-woven cloth, and paper can also be used in combination. As the metal foil, a single, alloy, or composite foil of copper, aluminum, brass, nickel, iron or the like having an elongation of 10 to 50% at 150 to 200 ° C. is used, and an adhesive is applied to one side of the metal foil as necessary. Layers can be provided. That is, 150 to 200
C is the temperature required for curing the resin, and the elongation rate is 10 to 5
0% is the elongation rate of the metal foil required to prevent the corrugation of the metal foil at the above temperature. Thus, a long laminated body having the above-mentioned metal foil provided on the upper surface and / or the lower surface of the resin-impregnated base material is laminated and formed into a body without pressure to obtain a laminated plate. 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 150 to 200 ° C. After lamination molding, after cutting to the required dimensions with a cutter,
After being subjected to after-curing for 10 to 60 minutes at a temperature above the glass transition point, it is rapidly cooled to obtain a laminated plate. The rapid cooling treatment is carried out at 30 ° C. or lower within 30 seconds by air cooling, water cooling, liquid nitrogen cooling, etc., but water cooling is preferable because it is easy and easy to process.

The present invention will be described below based on examples.

[0007]

Example 1 A long vinyl ester in which a glass cloth having a thickness of 0.15 mm and a width of 105 cm is impregnated with a vinyl ester resin (manufactured by Showa Polymer Co., Ltd., product number R806-DA) so that the resin amount is 50% by weight. Width 105 cm with an elongation of 10% at 180 ° C on the upper and lower surfaces of seven resin-impregnated glass cloths,
A long laminate having a long copper foil with a thickness of 0.035 mm is continuously laminated and formed at 160 ° C. for 30 minutes without pressure, cut into 100 cm squares with a cutter, and after-cured at 165 ° C. for 10 minutes. Then, it was rapidly cooled at 10 ° C. for 25 seconds to continuously obtain a laminated plate having a thickness of 1.2 mm.

[0008]

Example 2 The same process as in Example 1 was carried out except that a long copper foil having an elongation at 180 ° C. of 30% was used, and the thickness was 1.2 m.
m laminates were continuously obtained.

[0009]

Example 3 The same process as in Example 1 was carried out except that a long copper foil having an elongation at 180 ° C. of 50% was used, and a thickness of 1.2 m.
m laminates were continuously obtained.

[0010]

Comparative Example 1 A laminated plate having a thickness of 1.2 mm was continuously obtained in the same manner as in Example 1 except that the quenching treatment after after-curing was not performed.

[0011]

[Comparative Example 2] A laminated plate having a thickness of 1.2 mm was continuously obtained in the same manner as in Example 2 except that the quenching treatment after after-curing was not performed.

[0012]

Comparative Example 3 A laminated plate having a thickness of 1.2 mm was continuously obtained in the same manner as in Example 3 except that the quenching treatment after after-curing was not performed.

[0013]

[Comparative Example 4] The same treatment as in Example 1 was carried out except that a long copper foil having an elongation at 180 ° C of 1.5% was used to obtain a thickness of 1.2.
mm laminates were continuously obtained.

[0014]

[Comparative Example 5] A 1.2 mm thick sheet was prepared in the same manner as in Example 1 except that a long copper foil having an elongation at 180 ° C of 7% was used.
The laminated plate of was obtained continuously.

[0015]

[Comparative Example 6] A long copper foil having an elongation at 180 ° C of 1.5% was used and the same treatment as in Example 1 was carried out except that no rapid cooling treatment was performed after after-curing. Laminates were obtained continuously.

[0016]

[Comparative Example 7] A laminated plate having a thickness of 1.2 mm was processed in the same manner as in Example 1 except that a long copper foil having an elongation rate at 180 ° C of 7% was used and no rapid cooling treatment after after-curing was performed. Was continuously obtained.

The performances of the laminated plates of Examples 1 to 3 and Comparative Examples 1 to 7 are shown in Tables 1 and 2.

[0018]

[Table 1]

[0019]

[Table 2] Warpage after molding is 300 x 2 for double-sided copper foil-clad laminate after molding
Warpage of 50 mm size in mm. The warp after peeling on one side is the warp after removing the copper foil on one side of the laminated plate in mm.
It is shown in units. The dimensional change rate A shows the dimensional change rate in% after drying at 80 ° C. for 30 minutes after the etching treatment. The dimensional change rate B is the dimensional change rate in% after heating at 170 ° C. for 30 minutes after the dimensional change rate A treatment. The rate of dimensional change is all shrinkage.

[0020]

The present invention is constructed as described above. In the method for producing a laminated plate having the structure described in the claims, it is confirmed that the obtained laminated plate is less warped and twisted, and that dimensional stability can be improved, and that the present invention is excellent. ..

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideshi Makino 1048, Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works Co., Ltd.

Claims (1)

[Claims] 1. The elongation percentage at 150 to 200 ° C. is 10 to 50 on the upper surface and / or the lower surface of a required number of resin-impregnated long base materials.
% Of a long metal foil is continuously laminated without pressure, cut into a required size, after-cured at a temperature of a glass transition point or higher, and then rapidly cooled. A method for manufacturing a laminated board.