JPS61255849A - Cushion material for molding press - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a Vwl material for a forming press used in lamination molding of electrical laminates and decorative laminates.

[Background technology]

Conventional materials for molding presses use kraft paper, rubber sheets, asbestos sheets, etc. However, kraft paper and rubber sheets have large compressive stress, so once pressure-formed, the thickness decreases greatly and there is no restoring force, and the center There was a drawback that the thickness reduction was large at the end portions, and the thickness reduction was small at the end portions, resulting in uneven thickness reduction.

Asbestos sheets have the disadvantage that as the number of times they are used increases, unevenness occurs due to differences in the density distribution of the asbestos sheets themselves. As described above, as the number of times of use of conventional laminate materials increases, unevenness occurs in the material, resulting in large thickness deviations in the resulting laminates and decorative laminates.

[Purpose of the invention]

The object of the present invention is to provide a molding press that can reduce the thickness deviation of laminates and decorative laminates and achieve uniform molding of 8 to 15 sets of laminates and decorative laminates existing between hot plates. Our goal is to provide Fusilon materials.

[Disclosure of the invention]

In the present invention, a required number of combinations of resin-impregnated guff cloth and paper or resin-impregnated paper are laminated alternately, and then a laminate with metal foil arranged on the lower surface is laminated, and the overall thickness is 1 to 1.
．． 11EI is used as a cushioning material for a molding press. A mixture of glass cloth with high hardness and paper with relatively low hardness is used for rounding at an appropriate compression pressure, e.g. 5 to 20%.
As a result, it is possible to obtain laminates and decorative laminates with little thickness variation during use, and therefore with small thickness deviations. In addition, the metal foil on the surface makes it easier to wear shoes.
It can protect the material and improve the heat conduction effect, so it can uniformly heat the 8m thick laminates and decorative boards that exist between the heating plates, and achieve uniform molding. The present invention will be explained in detail below.

Examples of resins for the resin-impregnated cloth and resin-impregnated paper used in the present invention include phenolic resin, Frezy resin, epoxy resin, unsaturated polyester resin, melamine resin, polyimide, polybutadiene, polyamide, polyamideimide, poly/L/7on, Polybutylene terephthalate, polyether A/rton, fluorinated resin, etc. alone, modified products, mixtures, etc. are used, and solvents such as water, methyl alcohol, acetone, cyclohexanone, styrene, etc. are added to adjust the viscosity as necessary. It is something. As the glass cloth of the resin-impregnated glass cloth, glass woven cloth, glass non-woven cloth, glass vapor, etc. can be used, and as the paper, printer's cloth, kraft paper, etc. can be used, and there are no particular limitations.

As the metal foil, copper, brass, aluminum, niratil, stainless steel, iron, etc. metal foil can be used, and if necessary, the metal foil can be coated with an adhesive to improve adhesion. It is. The amount of resin in the resin-impregnated glass cloth is preferably I-■% by weight (hereinafter simply referred to as %). That is, 3) If it is less than zero, the strength of the Kufu Vyn material decreases, and if it exceeds 60%, the formability decreases. The amount of resin in the resin-impregnated paper is preferably 0 to 5.
0% is desirable. (2) If the amount exceeds %, the moldability will deteriorate, so if the amount of resin in the resin-impregnated glass cloth is increased, it is desirable to reduce the amount of resin in the resin-impregnated paper. If the overall thickness is less than 1W1), sufficient corrosion resistance cannot be obtained, and if it exceeds 4 m, thermal conductivity will decrease and uniform moldability will decrease. Further, the resins used for the resin-impregnated glass cloth and the resin-impregnated paper do not necessarily have to be the same resin, and can be arbitrarily selected.

The present invention will be explained below using examples.

Example Four sheets of Evoki V resin-impregnated paper with a resin content of ω% and a thickness of 0.2M were inserted between each of five sheets of Epoquin resin-impregnated glass cloth with a thickness of 0.2M and a resin content of 45%. A laminate having copper foils each having a thickness of 0.035 lll0 on the upper and lower surfaces was laminated and molded at a molding pressure of 65 #/CI of 4.165° C. for 90 minutes to obtain a 2 m thick cutsilon material for a molding press. Separately, a laminate of 6 sheets of phenolic resin-impregnated dry paper with a thickness of 0.2 ml and a 1025 W square was prepared, and the laminate was sandwiched between molded plates, and the above cushioning material was placed on the top and bottom surfaces of the laminate. One set was prepared by interposing the laminate, and 12 sets were heated and laminated for ω minutes at 160° C. and 100° C. to obtain a laminate plate having a thickness of 1.612F.

Conventional shoe V section material with compressive stress of 34% and thickness of 2m1゜10
Twelve laminates with a thickness of 1.6M were obtained in the same manner as in the example except that a 25W square rubber sheet was used.

〔Effect of the invention〕

As is clear from Table 1, the performance of the laminates formed using the cushioning material of the embodiment and the conventional example is good, and the performance of the laminates formed using the cushioning material of the present invention is good. It was confirmed that the cushioning material for molding presses of the invention is excellent.

Chapter 1 Table

Claims (1)

[Claims] (1) A required number of combinations of resin-impregnated glass cloth and paper or resin-impregnated paper are stacked one on top of the other, and then a laminate with metal foil arranged on the bottom surface is laminated to make the overall thickness 1 to 1. 4
A cushioning material for a molding press, characterized in that it is made in mm.