JPH0397550A - Production of laminated sheet - Google Patents

Abstract

PURPOSE:To obtain a laminated sheet which is free from generation of a warpage and good in interlamininar adhesive property by overlapping a dry base material impregnated with polyphenylene oxide resin, a polyphenylene oxide resin film and a metallic foil and curing the long-sized bandlike laminated body while continuously transferring this laminated body and thereafter cutting it into the required dimension. CONSTITUTION:As a long-sized dry base material 1 impregnated with polyphenylene oxide resin, woven fabric made of inorganic fiber such as glass and asbestos, organic synthetic fiber such as polyestyer and natural fiber such as cotton or the base material combined therewith are impregnated with polyphenylene oxide resin and utilized. As a polyphenylene oxide resin film 2, polyphenylene oxide resin is formed into a film having 0.01-0.2 mm thickness and this film is utilized. As a metallic foil 3, a single foil of copper, aluminum, iron, nickel, zinc, etc., an alloy foil and a composite foil are utilized. As the laminating rolls 4, the rolls made of metal, rubber and synthetic resin are utilized or the surfaces of metallic rolls are lined by rubber and synthetic resin and the rolls are arbitrarily utilized. As curing 6 of a long-sized banklike laminated body 5, the curing temp. and curing time can be selected by the kind of resin. It is important that curing is performed at from non-pressure to 20 kg/cm<2>.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a laminate used in electronic equipment, electric equipment, convenience stores, communication equipment, etc.

[Conventional technology]

Conventionally, the 1 fl plate used for electric equipment, etc. is made by laminating a laminate made of resin-containing paper, resin-containing glass, gold kJg foil and force) for a long time of 1 to 2 hours using a multistage press. Because the laminate is bent under heat and pressure, a certain amount of distortion remains in the laminate, and the heat generated when processing the laminate into a printed wiring board or when mounting electronic components on the printed wiring board causes warping. There was a drawback that caused problems in the automated process. This tendency was particularly strong for poly7-enylene oxide resin laminates intended to satisfy high frequency characteristics.

[Problem that the invention seeks to solve]

As described in the prior art section, the laminate obtained by the multi-stage press method ζ is warped during the processing process. The present invention has been made in view of the above-mentioned problems in the conventional technology, and its purpose is to provide a method for manufacturing a poly-7-enylene oxide resin laminate with good interlayer adhesion, without causing warping. There is a particular thing.

[Means for Solving Problems]] The present invention provides a polyphenylene oxide resin film that is disposed on each upper and/or lower surface of a required number of long polyphenylene oxide resin-impregnated dried base materials, and further provided with a polyphenylene oxide resin film on the outermost side as necessary. A method for manufacturing a laminate, which comprises stacking long metal foils and laminating the long strip-shaped laminate between laminating rolls disposed above and below, which is then continuously transferred and cured, and then cut into required dimensions. Therefore, pressure can be eliminated but minimized, thereby eliminating residual strain, and improving interlayer visibility due to the film.The present invention will be described in detail below.

Examples of the long polyphenylene oxide resin-containing dry base material used in the present invention include glass, unembroidered fibers such as asbestos, polyester, polyacrylic, polyvinyl alcohol, polyamide, polyimide, polyphenylene sulfite, polyurethane, etc. Polyphenylene oxide, cystyrene butadiene copolymer, triallyl isocyanurate, peroxidant, etc. are added to woven fabric, nonwoven fabric, mat, paper, or a combination of these materials made of organic composite fibers and natural fibers such as cotton. It is impregnated with additional polyphenylene resin so that the resin amount is 20 to 60% by weight (hereinafter simply referred to as "excellent"). It is preferable to use a viscous resin because it allows for more uniform impregnation. Fillers such as aluminum hydroxide, talc, silica, alumina, etc. can be added to the resin as necessary. Furthermore, although the resin may be used as it is, it is preferable to use it after degassing it under reduced pressure in order to suppress the generation of bubbles in the resin-containing fabric. As a polyphenylene oxide resin film, the above resin is used in a thickness of 0.01 to 0. A film formed in 2 tries can be used. As the metal foil, single, alloy, or composite foils of steel, aluminum, iron, aluminum, zinc, etc. are used. If necessary, an adhesive layer is provided on one side of the metal foil to improve adhesiveness. It can also be improved. The laminating roll may be made of metal, rubber, composite, resin, or a gold maple roll whose surface is lined with rubber or synthetic resin. The curing temperature and curing time of the long strip-shaped laminate can be selected depending on the type of resin film, but it is important that the curing is performed at no pressure to 20 kg/d.

An embodiment of the present invention will be described below based on the illustrated embodiment.

The broom construction diagram of the embodiment is a simplified process diagram showing one embodiment of the method of manufacturing @f# board according to the present invention.

As shown in Figure 1, the width is 10501g and the thickness is 0. 2 f
Fo Long glass cloth, polyphenylene t-cy}'
40! 40 parts of styrene-butadiene copolymer, 120 parts of triallyl isocyanurate, 2,5. Adding 6 parts of dimethyl 2.5 ditertiary butylbaroxy 7 hewisin 3 to contain nalphophenylene oxide resin so that the resin amount is 30 more,
A film 2 of the above-mentioned resin having a thickness of 0.025 tz is arranged between each of the four layers of the dried long polyphenylene oxide resin-impregnated dry base material 1 and on the outermost layer, and a film 2 of the above resin having a thickness of 0.025 tz is placed on the top and bottom surfaces. O
The adhesive side of 351I11 with adhesion agent@wi3 is stacked with the polyphenylene oxide resin film 2 facing the polyphenylene oxide resin film 2, and the laminated long strip-shaped laminate 5 is sent to the curing furnace 6 through the laminating rolls 4 arranged above and below. After curing by heating at a temperature of 100° C. and a contact pressure, it was cut with a cutter 7 every 1000×Zoo (m) to obtain a double-sided copper-clad laminate 8 having a thickness of 0.9H.

Comparative Example 1 The same long polyphenylene oxide resin-impregnated dry base material as in the example was cut into 1050 x IQ50 fl squares, and four sheets were stacked, and the same steel foil as in the example and the same dimensions as above were placed on the top and bottom surfaces. Place the cut pieces at 220℃, SO
A double-sided copper-clad laminate having a thickness of 0.8 fl was obtained by heating and pressing at Kq/d for 30 minutes.

Comparative Example 2 A double-sided steel clad laminate with a thickness of 0.8 mounds was obtained by processing in the same manner as in the example except that the resin film of the poly7enylene resin film of the example was omitted.

The performance of the laminates of Examples and Comparative Examples 1 and 2 is shown in Table 1. [Effects of the Invention] The present invention is constructed as described above. The method for manufacturing a laminate having the structure described in the claims has the effect of producing a laminate with less warpage and good visibility between layers.

[Brief explanation of drawings]

FIG. 1 is a simplified process diagram showing an embodiment of the method for manufacturing a laminate according to the present invention. 1 is a long resin-containing dry base material, 2 is a resin film 3 is a copper foil, 4 is a laminating roll, 5 is a long strip-shaped laminate, 6 is a curing furnace, 7 is a cutter, and 8 is a laminate plate.

Claims (1)

[Claims] (1) Arrange a polyphenylene oxide resin film on the top and/or bottom surface of each of the required number of long polyphenylene oxide resin-impregnated dried base materials, and then layer a long metal foil on the outermost side as necessary, and then A method for manufacturing a laminate, which comprises continuously transferring a laminated long strip laminate through disposed laminate rolls, curing the laminate, and then cutting the laminate into required dimensions.