JPS5970518A - Preparation of laminated sheet - Google Patents

Abstract

PURPOSE:To prepare a laminated sheet at a high efficiency by cutting and then after-curing a hot-pressed laminated sheet obtained by pressure-molding plural lapped sheets of long prepreg provided by impregnating and drying thermosetting resin. CONSTITUTION:Long base material (paper base, glass-cloth base, etc.) is impregnated with thermosetting resin (epoxy resin, phenol resin, etc.) to provide a long prepreg 1 and the long prepreg is lapped about rolls 5. The prepreg 1 is unwound from the rolls 5 into a plurality of lapped prepreg sheets 1, 1... and they are supplied by turns between hot platens 2, 2, heated and pressure-molded by the hot platens 2, 2 to provide a hot-pressed laminated sheet 3. This hot- pressed laminated sheet 3 is cut by a cutter 4 to a desired dimension to obtain laminated bodies 6. These laminated bodies 6 are mounted one by one on multiple steps in an after-curing furnace 8 and after-cured at 160-190 deg.C for 30min- 2hr. In this manner, the laminated sheets can be provided continuously and efficiently by a series of operations.

Description

[Detailed description of the invention] The present invention relates to a method for manufacturing a laminate.

Conventionally, when manufacturing this type of laminate, the laminate was produced by laminating multiple sheets of pre-prep with regular dimensions, which were formed by impregnating and drying a thermosetting resin, and then heating and press-forming the laminate. However, there was a problem in that production efficiency was low because it took time and effort to stack prepregs of regular size one above the other and hot-press mold each sheet one by one.

The present invention addresses the above points! The purpose of this invention is to provide a method for manufacturing a laminate board that can be manufactured with high production efficiency.

The present invention will be explained in detail below. The base material is formed into a long belt shape, and a paper base material, a glass cloth base material, a glass nonwoven fabric base material, etc. can be used. As the thermosetting resin, phenolic resin, unsaturated polyester resin, diallyl phthalate resin, evo+silicone resin, polybutadiene resin, etc. can be used, and the above-mentioned base material is impregnated with this thermosetting resin and dried. This is to form a long prepreg fi+.

In terms of performance, it is preferable to use a fucolas fabric base material impregnated with Eboshi resin. The prepreg (1) thus formed is used by winding it up into a roll (5) as shown in FIG. When manufacturing laminates,
While unwinding the prepreg fl+ from the roll (5), multiple sheets of prepreg fil (1+, l) are sequentially supplied between the hot plates t21 +21 in a stacked state, and then
Heat and pressure molding is performed to produce a C heat-press laminate plate (3). The heating and pressurizing conditions for this heat a (2) are, for example, 10 to 30 Kf.
l/7.150-180°d.

It can be carried out for 5 to 20 minutes and is carried out at relatively low pressure. The hot-press laminate (3), which is sequentially drawn out from 2+ +21, is then cut into desired dimensions by a cutter (4) that is disposed on the conveying direction side of the hot plate (2) so as to be able to move vertically. Then, as shown in Fig. 2, this laminate (6) was placed one by one between multiple stages in an after-sales furnace (8) and heated at 160 to 190°C for 30°C. The after-sales service 17 is carried out for 1 to 2 hours.In Figure 1, (7) is a long piece of copper foil, which is wound in a 0-roll shape.
) or on both the upper and lower surfaces of Brypurezi+11 and supplied between the hot plates f21 and +21 to obtain a laminate in which copper foil (7) is integrally molded.

In this way, a plurality of long hanging registers (1) are piled up and heat molded (2) is sequentially supplied between 21 and subjected to heating and pressure molding, and is sequentially derived from between 21 and 21. This hot-pressing laminate (3) is cut into desired dimensions, and then subjected to an after-treatment process. By continuously supplying heat W (21) between the It is possible to continuously produce plates, and by cutting the heat-pressing laminate plate (3) consisting of multiple sheets of pre-prep to desired dimensions, it is possible to stack multiple sheets of pre-prep with regular dimensions as in the past. There is no need to match them together.Furthermore, by subjecting a plurality of laminates (6) to post-sales inspection at once, a laminate can be manufactured in a short time. In the present invention, a plurality of elongated buriprej formed by impregnating and drying a thermosetting resin on a elongated base material are sequentially supplied between hot platens and subjected to heating and pressure forming. !11 The hot-press laminates that are sequentially drawn out from between the boards are cut to the desired size [7, and then after-soldier-nealed, so they can be laminated continuously through a series of operations such as heating, pressing, cutting, and after-snealing with Briprezi. It is possible to manufacture plates, and the production efficiency of laminated plates can be improved since there is no need for the conventional operation of stacking prepregs of regular dimensions and then heating and press-forming them.

The present invention will be specifically described below based on Examples.

<Example> A long glass cloth with a thickness of 0.1 m and a medium size of 1050 m was impregnated with 4# epoxy resin with a fat content of 60% by weight and dried to obtain a long buriprezi with a resin content of 60% by weight. Next, as shown in Fig. 1, five sheets of this prepreg were stacked, and a long piece of foil with a thickness of 35 mils was stacked on the top and bottom of the prepreg, and then fed between hot plates, heated at 160°C for 20 kg. /a
A hot-press laminate was obtained by molding at rt. Next, the hot-press laminate was cut into 9 pieces every 1050 shoes using a cutter, and then 20 sheets of the cut laminate were stacked and heated in an after-treatment furnace at 170° C. for 50 minutes to obtain a laminate.

<Conventional example> One precipitate, which is the same as that obtained in the example, was prepared in advance by 105
0 x 1050 am, then stacked 5 sheets of this standard size Puri-zuri V, and overlapped the copper foil used in Example 7 on the top and bottom surfaces of the Bri-Preg and heated at 165°C for 2 hours.
A laminate was obtained by molding at 100 Kfl/cr/l.

As a result, the production efficiency in the example is 1.5 times that of the comparative example, and energy A-consumption iii, 1d is 1/1 of that of the comparative example.
2. The equipment cost was 115, and the method of the example was superior in terms of production efficiency and cost. - "4. Brief Description of the Drawings Figures 1 and 2 are schematic illustrations of embodiments of the present invention.

+1+ is briprezi, (2) is hot-blooded, (3) is hot-press laminate, and (4) is h-run-.

Agent Patent Attorney Ishi 1) Choshichi

Claims (1)

[Claims] (1) A long base material is impregnated with a thermosetting resin and dried to form a plurality of long pre-registers, which are stacked one on top of the other, and are sequentially fed between hot platens for heating and pressure forming. A method for producing a laminate, which comprises cutting the hot-press laminate sequentially drawn out from between the plates into desired dimensions, and then subjecting it to after-sales repair.