JPH0220327A - Production of laminate - Google Patents

Abstract

PURPOSE:To markedly lower the rate of generation of wrinkles on the surface of a laminate and enhance the number of times that a cushioning member can be used in the meantime by using as the cushioning member a hermetically sealed bag containing a material which is solid at normal temperature, is softened at 60-100 deg.C and shows fluidity at or above 140 deg.C. CONSTITUTION:A laminate comprising a resin-impregnated material, a metallic foil and, optionally, an inner layer material is produced by laminate molding by use of a metallic plate and a cushioning member. A resin for use in the resin-impregnated material may be a phenolic resin, a cresol resin, an epoxy resin, an unsaturated polyester resin, a melamine resin, a polyimide, polybutadiene, a fluororesin or the like, at least one of which may be used either singly, or in a modified state or in combination. The metallic foil and the plate may be formed of a single metal such as copper, aluminum, iron, nickel and zinc, an alloy thereof or the like. A hermetically sealed bag containing a material which is solid at normal temperature, is softened at 60-100 deg.C and has a viscosity of preferably 1-2,000cP at a temperature of 140 deg.C or above is used as the cushioning member. The hermetically sealed bag may be a heat-resistant bag of a polyimide, a silicone polymer, a fluororesin or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing electrical laminates used in electrical 41II appliances, computer bells, communication equipment, and the like.

[Conventional technology]

Conventionally, electrical laminates consist of a laminate consisting of a resin-impregnated base material and metal foil sandwiched between metal plates, which are stacked one on top of the other, with a cushioning material interposed on the outside, and a carrier plate as required, and heated. It is obtained by sandwiching between discs and laminating under heat and pressure, and the cushioning material used is resin board, paper, resin-impregnated paper cloth, etc.

[Problem that the invention seeks to solve]

As mentioned in the conventional technology, resin plates are used as cushioning materials.
If resin-impregnated paper cloth or the like is used, wrinkles will occur on the surface of the laminate due to insufficient cushioning properties. When paper is used, the shoes have good sheen properties, but the cushioning properties are lost after a few times and the shoes are not durable.

The present invention was made in view of the above-mentioned problems in the conventional technology, and its purpose is to create a laminated layer with no wrinkles on the surface by using a cushioning material that has good cushioning properties and is durable. The object of the present invention is to provide a manufacturing method by which a plate can be obtained.

[Means for solving problems]

In the present invention, when forming a right laminate consisting of a resin-impregnated base material, metal foil, and optionally an inner layer material using a metal plate and a cushioning material, it is solid at room temperature and softens at ω~ioo°C, and is 140"C Since the method for manufacturing a laminate is characterized by using a sealed bag containing a material exhibiting fluidity as a cushioning material, a cushioning material made of a cushioning material is preferably used.
In addition, the present invention is durable and can eliminate wrinkles on the surface of the laminate.The present invention will be described in detail below.

Examples of resins for the resin-impregnated base material used in the present invention include phenolic resin, cresol resin, epoxy resin, unsaturated polyester resin, mehumine resin, polyimide, polybutadiene, polyamide, polyamideimide, polysulfone,
Polyphenylene sulfide, polyphenylene oxide, polybutylene terephthalate, polyether ether ketone, fluorinated resin, etc. alone, modified products, mixtures, etc. are used, and if necessary, water, methyl alcohol, aptane, cyclohexanone, styrene, etc. are used to adjust the viscosity. The base materials include woven fabrics, non-woven fabrics, mats, etc. made of inorganic fibers such as glass and asbestos, organic synthetic fibers such as polyester, polyamide, polyvinyl alcohol, and acrylic, and natural Ra such as cotton. Paper or a combination of these materials, etc. Gold 11ffi! : Steel, aluminum, iron, nickel, zinc, etc. alone, alloy, composite amount: 8 pieces,
The adhesive surface is chemically and/or physically treated as necessary, and an adhesive layer is further provided as necessary. The metal plate may be made of iron, aluminum, copper, nickel, or the like with a thickness of 1 to 5H, either alone, in an alloy, or in combination, and a release layer may be provided on the surface if necessary.

As a cushioning material, it is solid at room temperature, softens at aO to 100"Q, and preferably 1 to 2000 Cp at 140°C or higher.
Materials having a viscosity of s, ie, Novohook type phenolic resins containing no curing agent or crosslinking agent, xylene resins, unsaturated polyester resins, epoxy resins, etc., which meet the above conditions, can be used. As the airtight bag, any bag having heat resistance such as polyimide, polyphenylene sulfide, silicone polymer, fluoride 1ft fat, etc. can be used, and as the material, it is preferable to use it with a thickness of 0.1 to 10. This is highly desirable for cushioning purposes. Furthermore, if necessary, the whole is sandwiched or placed on carrier plates and used for lamination molding.

The present invention will be explained below based on examples.

Example: Epoxy resin (manufactured by Cie Kagaku Co., Ltd., product name: Ebiko) 1001) 100 on a glass cloth with a thickness of 0.2H
Part by weight C (hereinafter simply referred to as part), 4 parts of dicyandiamide,
0.2 parts of benzyldimethylamine, methyl oxide/
I/C was impregnated with 100 parts of epoxy resin face so that the resin amount after drying was 0% by weight (hereinafter simply referred to as %) I/C, and then dried on the upper and lower surfaces of 7 resin-impregnated substrates. 10 laminates each having copper foil with a thickness of 0.035111 sandwiched between 2 m thick stainless steel metal plates.
Thickness 0.1111 as cushioning material on the outside of the stack.
A polyimide polymer airtight bag with a thick Novohook type phenolic resin (softening point 80'Q) that does not contain a hardening agent.
(viscosity 1000 cps at 165°C) sheets were housed in the upper and lower molding pressure 40 kg/d, 165
Lamination molding was carried out for 120 minutes at ℃ to obtain 10 double-sided steel clad laminates having a thickness of 1.6H.

Comparative Example Ten sheets of double-sided steel-clad laminates with a thickness of 1.6 ml were obtained in the same manner as in the example except that 5 sheets of kraft paper with a thickness of 0.2 ff were used for the upper and lower sides as the silica material.

Table 1 shows the surface wrinkle occurrence rate of the laminates of Examples and Comparative Examples and the durability of the Silkshire material.

Table 1 [Effects of the Invention] The present invention is constructed as described above. In the method for manufacturing a laminate having the structure set forth in claim 1, item 6, the wrinkle occurrence rate on the surface of the laminate is greatly reduced, and the number of service life of the cushioning material is greatly increased. are doing.

Claims (1)

[Claims] (1) When forming a laminate consisting of a resin-impregnated base material, metal foil, and optionally an inner layer material using a metal plate and a cushioning material, it should be solid at room temperature, soften at 60 to 100°C, and soften at 140°C or higher. A method for manufacturing a laminate, characterized in that a sealed bag containing a fluid material is used as a cushioning material.