JPH04185408A - Manufacture of thermosetting resin laminate - Google Patents

Abstract

PURPOSE:To improve some properties such as heat resistance and dimension stability, while the occurrence of the uneven plate-thickness of a product is suppressed small by forming the projection provided along each side on its front surface-side on cushion material. CONSTITUTION:Laminated material is composed of the prepreg 1 in which the base material of paper or cloth is impregnated with thermosetting resin varnish, and the metallic foil 2 arranged on the upper and lower surfaces. A plurality of sets in which laminating materials are nipped between the mirror surface-plates 3, are laminated, and are arranged between hot platens 4 through carrier plates 5 and cushion plates 6, and then press working is achieved by hot platens 4. The laminating material composed of prepregs and metallic foils 2 is formed into prescribed thickness. Then projections 7 are formed along each side of the cushion material 6, and since the pressing pressure in the peripheral edge part of the laminating material becomes higher than that in the other part by the projection 7 in press forming, the flowing out of the molten resin in the prepreg 1 may be prevented as far as possible.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for manufacturing a thermosetting resin laminate suitable for printed wiring boards for industrial equipment, electronic parts, and electrical equipment.

<Conventional technology> Conventionally, laminates are made by stacking 1 to 20 sets of prepreg and metal foil laminated abrasives sandwiched between mirror plates, and sandwiching them between hot plates via cushioning material and carrier plates. , obtained by heating and pressure molding.

As the mirror plate, a metal flat plate with a thickness of 1 to 5 mm is used.

The laminating method in this heat and pressure molding is the so-called cold-hot-cold method, in which a pressure saw is applied and then the temperature is raised, and the hot-cold method, in which a hot plate is warmed to the desired temperature and then a pressure saw is applied. There is a method.

In either method, the cushioning material prevents the "strain" of the carrier plate and hot plate from being transferred to the product or mirror plate, and also prevents the "strain" caused by the variation in the laminated materials used.
It is used to prevent "strain" from being transferred to the carrier plate and heating plate.

<Problems to be Solved by the Invention> However, in the conventional method for manufacturing thermosetting resin laminates, the amount of laminate material that is sandwiched and formed at one time between hot plates increases to a total product thickness of 12 to 26 mo+. There are, but
This is a constraint from the viewpoint of production and moldability, and since there is a large amount of laminated material and the thickness balance A is large, it is necessary for cushion material A to have a large cushion material. , 1 is effective in preventing strain J, and 2
).

However, due to the bending, the resin protrudes from the edges of the molded special product, and the variation in the thickness of the product increases.
It has been pointed out that this is a drawback in that it causes variations in various properties such as heat resistance and dimensional properties, resulting in a deterioration in the quality of the laminate.

This phenomenon is observed in both the cold-hot-cold method and the hot-cold method. 1 The present invention was made in view of the above circumstances, and the purpose of the present invention is to control the protrusion of resin from the edges of the product during molding. The object of the present invention is to provide a method for manufacturing a thermosetting resin laminate that suppresses variation in plate thickness and improves various properties such as heat resistance and malleability.

<Measures to Solve the Problems> In order to achieve the objective, the present invention impregnates paper or cloth with a thermosetting resin. A laminated shrine consisting of pre-preg and metal foil: 1 is sandwiched between mirror plates, laminated in large numbers, placed between hot plates with cushioning material and carrier plates interposed, and formed by heating and pressurizing the hot plates. 4) Production of thermosetting resin laminates) J method? 1. The cushioning material is characterized in that protrusions along each side are formed on the front side of the cushioning material.

Thermosetting resins used in the present invention include) J-nor resin, cresol resin, Epoquin resin, polyimide resin,
Thermosetting resins such as polyester resins and melamine resins may be used alone, modified products, or mixtures thereof.

The substrate may be woven fabrics, non-woven fabrics, mats, or paper made of inorganic fibers such as glass and asbestos, synthetic fibers such as polyester, polyamide, and acrylic, and natural fibers such as cotton, or their inn i'i bases. material is used.

Furthermore, metal foils include single, alloy, and composite products such as copper, aluminium, iron, niracle, and zinc.
Depending on the situation, the C adhesive surface is subjected to chemical treatment or physical treatment, or these are applied, and an adhesive layer is further provided as necessary.

In addition, as a mirror plate, there are 1 to 5 sizes of iron, aluminum, copper, nickel, etc., alloys, and composites.
The same goes for the shrine in the frame.

Furthermore, it is also possible to provide a release layer on the surface of the mirror plate, if necessary.

In addition, cushioning materials include rubber, synthetic resin, cloth,
Any material that has elasticity such as paper, board, etc. may be used, and the protrusions provided on the surface of the cushion material may also be made of material that has elasticity such as rubber, synthetic resin, cloth, paper, board, metal, etc. , it is possible to use either one even if there is no one.

<Function> As is clear from the following section, protrusions are formed along each side on the surface of the cushion material. The pressure is relatively high in other parts, so the internal resin does not protrude into the rows during molding.

<Example> Hereinafter, the method for producing a thermosetting resin laminate according to the present invention will be described.
Examples will be described in detail.

FIG. 1 is a schematic diagram showing an embodiment of the method of the present invention.

In FIG. 1, a laminated material is composed of a prepreg 1 made of paper or fabric impregnated with thermosetting resin varnish, and metal foils 2 placed on the top and bottom surfaces of this prepreg 1. As shown in the figure, a plurality of sets of VXX layer material are sandwiched between them, and a carrier plate 5 is placed between the hot plates 4.
, are arranged with cushion moons 6 interposed therebetween, and press working is performed using a hot plate 4 to form a laminated layer 11 consisting of prepreg 1 and metal foil 2 to a predetermined thickness.

At this time, protrusions 7 are formed along each side of the cushioning material 6, and during press coloring, these protrusions 7 cause the laminated material #
:4: Since the press pressure is higher at the peripheral edge than at other parts, the molten resin in the prepreg 1 can be prevented from spilling out as much as possible.

Next, examples to which the method of the present invention is applied will be specifically described.

Example 1 Thickness 0. 100 parts by weight of an epoxy resin (Epicoat 1001 manufactured by Shell Chemical Co., Ltd.), 4 parts by weight of dicyandiamide, and 0.0 parts by weight of benzyldimethylamine were placed on a 2 mm glass cloth.
An epoxy resin varnish consisting of 2 parts by weight and 100 parts by weight of methyl oxidol was impregnated so that the amount of resin after drying was 500 parts by weight, and dried. Ten sets of laminated materials with copper foil placed thereon were sandwiched between 3 mm thick mirror plates, and a thermosetting resin laminate was molded by the method shown in FIG.

Comparative Example 1 A copper-clad laminate was obtained in the same manner as in Example 1, using a flat cushioning material without protrusions.

Table 1 shows the characteristics of the samples prepared in Example 1 and Comparative Example 1.

Table 1 Soldering heat resistance: PCT treatment for 2 hours at 260°C Dimensional change rate: 150°C for 30 minutes It is clear that the heat resistance and dimensional change rate are superior to those of Comparative Example 1.

<Effects of the Invention> As explained in section 2 below, the method for manufacturing a thermosetting resin laminate according to the present invention has a simple structure in which projections are provided along each side of the surface of the cushioning material that absorbs "strain". However, it has the effect that the thickness deviation of the laminate can be controlled to be small, and the soldering heat resistance, dimensional characteristics, etc. can be significantly improved compared to conventional ones.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a schematic configuration of the method of the present invention. 1...Prepreg 2...Metal foil 3...Mirror plate 4...Hot plate 5...Carrier board 6...Cushion material 7... Protrusion 1---Prepreg 2--One gold IK foil 3-Mirror plate 4- Hot plate 5---Carrier plate Figure 1

Claims (1)

[Claims] 1. A laminated material consisting of prepreg and metal foil, which is a paper or cloth base material impregnated with thermosetting resin varnish, is sandwiched between mirror plates, laminated in large numbers, and placed between hot plates via a cushioning material and a carrier plate, In the method of manufacturing a thermosetting resin laminate formed by heating and pressurizing a hot plate, the cushioning material is a thermosetting resin laminate, characterized in that the cushioning material has protrusions along each side formed on its surface side. A method for manufacturing a synthetic resin laminate.