JPH01150542A - Laminated plate for electric use - Google Patents

Abstract

PURPOSE:To obtain a laminated plate for electric use having no poor outer appearance of the surface and superior thermal resistance, by providing resin-impregnated base materials not containing a filler at the upper and lower surfaces of base material impregnated with resin varnish containing aluminum hydroxide and glass fibers as fillers, and further providing a metal foil at the upper and/or lower surfaces of the resin-impregnated base materials. CONSTITUTION:At the upper and lower surfaces of a base material which is impregnated with resin varnish containing aluminum hydroxide and glass fibers as fillers, a resin-impregnated base material not containing a filler is provided. Furthermore, at the upper and/or lower surfaces of the above-laminated member, a metal foil is provided. Then, the laminated member is molded to be a laminated plate for electric use. Accordingly, the heat resistance of the laminated plate is improved while the properties of the resin are maintained. Moreover, because of the glass fibers, the surface of the laminated plate appears good. The glass fiber has the diameter 5-15mum and the length 5-50mum, and it is treated by silane coupling agent. If the diameter and the length of the glass fiber are below 5mum, the outer appearance of the surface of the laminated plate cannot be improved. Moreover, if the diameter and the length of the glass fiber exceeds 15mum and 50mum, respectively, the impregnating ability of the resin into the base material is lowered.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an electrical laminate used in electrical equipment, electronic equipment, computing equipment, communication equipment, etc.

[Background technology]

Conventionally, the heat resistance of electrical laminates has been improved by converting the resin itself of the resin-impregnated base material from, for example, phenolic resin to epoxy resin, or even polyimide resin. When unique properties are required, attempts have been made to modify the resin or add inorganic powder fillers.

Resin modification has certain effects, but it is unavoidable that the properties of the resin itself change, and the disadvantage of adding inorganic powder fillers is that the laminate surface tends to have a moth-eaten appearance. was there.

[Purpose of the invention]

The purpose of the present invention is to provide yI with no appearance defects on the surface of the laminate and excellent heat resistance! [Disclosure of the Invention] The present invention provides a resin-impregnated base material that is impregnated with a resin varnish containing aluminum hydroxide and glass fibers as fillers, and the upper and lower surfaces of the resin-impregnated base material are filled. This electrical laminate is characterized by being formed by NJ molding of a laminate made of a resin-impregnated base material that does not contain any additives, and metal foil is placed on the upper and/or lower surfaces of the laminate. The heat resistance can be improved while making the most of the properties, and furthermore, the appearance defects on the surface of the laminate can be eliminated by the use of glass fibers.The present invention will be described in detail below.

The inorganic powder filler used in the present invention is limited to aluminum hydroxide, and its particle size is not limited, but it is preferable that the particle size is less than IOO mesh for better dispersibility. The amount added is preferably 1 to 30% by weight (hereinafter simply referred to as %) of the resin phenol. That is, if it is less than 1%, it is difficult to improve the heat resistance;
This is because if it exceeds %, the impregnating property to the base material will decrease. The glass fibers are preferably alkali-free glass fibers with a fiber diameter of 5 to 15 microns and a length of 5 to 50 microns. That is, if the fiber diameter is less than 5 microns, the appearance of the surface of the laminate cannot be improved, and if the fiber diameter exceeds 15 microns and the length exceeds 1 micron, the impregnation into the base material will deteriorate. The amount added is preferably 1 to 3% of the resin phenol. That is, if it is less than 1%, the appearance of the laminate surface cannot be improved, and if it exceeds I%, the impregnation into the base material will be reduced. Examples of the resin pheno to be impregnated into the base material include pheno-II/resin, creso/L/9j resin, epoxy resin, unsaturated polyester resin, melamine resin, polyimide, polybutatsuene, polyamide, polyamideimide, boris sulfone, polyphenylene sulfide, polyphenylene oxide, Polybutylene terephthalate, polyether pether μ ketone, fluorinated resin, etc. alone, modified products, mixtures, etc. are used, and if necessary, 1 flt of water, methyl alcohol, acetone, cyclohexanone, styrene, monomer, etc. is used to adjust the viscosity.
The base material is woven fabric or non-woven fabric made of inorganic fibers such as glass and asbestos, organic synthetic fibers such as polyester, polyamide, carbon, polyvinyl alcohol, polyacrylic, aramid, and natural fibers such as cotton. , Maputo or paper, or a combination thereof. Metal foils include copper, iron, aluminum, brass, nickel,
Adhesiveness can be further improved by providing an adhesive layer on one side of a material such as stainless steel, composite material, surface treated product, etc., if necessary.

As the lamination molding, general lamination molding methods such as a multi-stage molding method, a multi-roll method, a contact pressure method, a pressureless molding method, and a double belt method can be used, and are not particularly limited.

The present invention will be explained below based on examples.

Example filler: 200 mesh aluminum hydroxide 8%
And fiber diameter micron, fiber length micron Schiffen coupling agent treated glass fiber! Resin-impregnated base material 5 obtained by impregnating an unsaturated polyester resin pheno containing 7% with a long gaffs barber with a thickness of 0.2n so that the resin amount is 50%.
On the top and bottom surfaces of the sheet, a long guff cloth with a thickness of 0.2H is coated with unsaturated polyester resin phenol containing no filler and the amount of resin is 5.
One resin-impregnated base material impregnated to a concentration of 0% was placed on each side, and an adhesive layer was applied to the top and bottom surfaces to a thickness of 0.035 m.
14 long strip-shaped laminates each having a long copper foil arranged thereon without pressure.
After molding for 1 minute at 5°C, the product was cut into required dimensions to obtain an electrical H-layer board.

Comparative Example A laminate in which the copper foil of the example was disposed on the upper and lower surfaces of seven resin-impregnated guff cloths containing no filler was treated in the same manner as in the example to obtain an electrical laminate.

〔Effect of the invention〕

As is clear from Table 1, the performance of the electrical laminates of Examples and Comparative Examples was good, confirming the superiority of the present invention.

Table 1 note Nana open heat resistance

Claims (3)

[Claims] (1) A resin-impregnated base material containing no filler is arranged on the upper and lower surfaces of a resin-impregnated base material impregnated with a resin varnish containing aluminum hydroxide and glass fibers as fillers, and the upper surface and/or An electrical laminate, characterized in that it is formed by laminating and molding a laminate with metal foil arranged on the bottom surface. (2) The glass fiber has a diameter of 5 to 15 microns and a length of 5 to 15 microns.
The electrical laminate according to claim 1, characterized in that the thickness is 50 microns. (3) Claims 1 and 2, characterized in that the glass fiber is treated with a silane coupling agent.
Electrical laminate as described in section.