JPS6143566A - Manufacture of laminated board - 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 of the Invention] The present invention relates to a method for manufacturing a laminate using a novel cushioning material.

[Technical background of the invention and its problems] In recent years, copper-clad laminates have been widely used in the electronic and electrical industry, and various decorative laminates have been used in the architectural field. When manufacturing these plates, sheet materials are heated and pressed using a stack press to laminate them, but a cushioning material is inserted between the hot press plate and the mirror plate that will be applied to the product. This makes it possible to achieve uniform pressure, uniform temperature rise, and good heat dispersion. BACKGROUND ART Traditionally, as cushioning materials, single or composite materials such as paper such as kraft paper and linter paper, felt, rubber, and glass cloth have been used.

However, the above-mentioned conventional cushioning materials have poor durability and their thickness changes due to wear at the ends during use, so that the number of times that they can be used repeatedly is limited. In addition, the lack of uniform heat dispersion causes voids and scratches in the product, steam piping marks, and sagging at the edges of the thickness. Therefore, if a laminate is manufactured using the above-mentioned conventional cushioning materials, the result will be a product with poor thickness accuracy and poor appearance.Furthermore, the conventional cushioning materials are weak materials such as paper and rubber, making them difficult to handle. There were drawbacks such as the inability to respond to automation of manufacturing equipment.

[Object of the Invention] The object of the present invention was to solve the above-mentioned drawbacks, and to provide a product with good thickness accuracy and appearance, and
The present invention aims to provide a method for manufacturing laminates that can be automated.

Summary of the Invention] As a result of intensive research to achieve the above object, the present inventors have developed a novel cushioning material in which a good thermal conductor such as a metal plate or metal foil is laminated with elastic fiber paper or non-woven fabric. Thus, we have discovered a method for manufacturing a laminate that can achieve the above object.

That is, 11 the present invention provides an 8i-layer cushion material in which a paper-like or non-woven fabric-like poor heat conductor made of elastic fibers is laminated and integrated on at least one side of a sheet-like or foil-like good heat conductor. This is a method for producing a laminate, characterized in that the laminate is formed by being inserted between the laminate and the laminate.

The sheet-like or foil-like thermal conductor used in the present invention includes:
A sheet made of metal such as iron, copper, or aluminum or foil can be used. The thickness of these sheets or foils is 0.07-2mmPi! It is preferable to set it as degree. If the thickness exceeds 2 mm, the workability will be poor due to the mold itself, and if it is less than 0.07 mm, it will be difficult to handle, which is undesirable.

Examples of the poor thermal conductor in the form of paper or non-woven fabric made of elastic fibers used in the present invention include paper or non-woven fabric made of 6,6 nylon, polyamide fibers, polyester fibers, etc., particularly Nomex, Kevlar (both DuPont Aromatic polyamide fibers such as (trade name manufactured by Yojin Co., Ltd.) and Cornex (trade name manufactured by Yojin Co., Ltd.) are preferable.

As shown in FIG. 1, the cushioning material used in the present invention has a poor thermal conductor 2 in the form of paper or non-woven fabric made of elastic fibers such as polyamide on both sides of a good thermal conductor 1 such as a sheet-shaped iron plate.
It is made by bonding using an adhesive such as epoxy or polyimide.

Alternatively, as shown in Figures 2a and 2b, the thermally good conductor 1 and the thermally poor conductor 2 are laminated and integrated alternately, so that one of the outermost layers is the thermally good conductor 1 and the other is the thermally poor conductor 1 as shown in Figure 2a. Although not shown, the outermost layer may be a good thermal conductor on both sides.Furthermore, as shown in Fig. 2b, a good thermal conductor 1 and a poor thermal conductor 2 are alternately laminated and integrated so that the outermost layer In both cases, a thermally defective conductor 2 may be used. In short, the cushioning material may be a laminated combination of a thermally good conductor and a thermally poor conductor, and the form of the combination can be selected as appropriate depending on the characteristics required of the laminated plate, the number of press stages, etc.

By using such a cushioning material, it is possible to construct a laminate or decorative board that satisfies both properties and appearance.

That is, it is obtained by impregnating a base material of kraft paper, wax paper, glass cloth, etc. with a thermosetting resin such as phenol resin, melamine resin, unsaturated polyester resin, epoxy resin, or polyimide resin.

When a predetermined number of pre-preg sheets are stacked and heated and pressed between a pair of mirror plates, this cushioning material is inserted between the hot plate and the mirror plate to improve thickness accuracy.
It was possible to produce a laminate or decorative board with good appearance.

[Embodiments of the invention] Examples of the present invention will be described below.

Example 1 A plurality of semi-pierced prepregs made by impregnating glass cloth with epoxy resin are stacked, electrolytic copper foil is stacked on top and bottom of this, and further sandwiched between mirror plates, and between the mirror plate and the press hot plate, Cushioning materials laminated with 4ml of nonwoven fabric made of aromatic polyamide fibers were inserted on both sides of a 2mm iron plate, and heated and pressed at 170°C and 30ka/cm2 for 1 hour to produce a copper-clad laminate.

Examples 2 and 3, Comparative Examples 1 to 4 70 μm thick copper foil as cushioning material (Example 2)
A copper-clad laminate was produced in the same manner as in Example 1, except that a cushioning material in which nonwoven fabrics made of aromatic polyamide fibers were laminated on both sides of a 2 mm thick aluminum plate (Example 3) was used.

The properties of the copper-clad laminate thus obtained are shown in Table 1.

For comparison, asbestos-containing kraft paper (Comparative Example 1), linter paper (Comparative Example 2), Fell 1 to (Comparative Example 3)
) and felt-rubber composite (Comparative Example 4) were respectively inserted between the mirror plate and the hot platen, and a copper-clad laminate was manufactured in the same manner as in the example.

The properties of the copper-clad V4 laminate thus obtained are also shown in Table 1.

Examples 4 to 6 and Comparative Examples 5 to 8 Furthermore, using the cushion sheets used in Examples 1 to 3 and Comparative Examples 1 to 4, decorative boards were manufactured in the following manner.

A predetermined number of sheets of prepreg, which is made by impregnating phenolic resin into kraft paper and drying, are stacked, and the top and bottom of the prepreg are wrapped with decorative printing paper, respectively, and sandwiched between a pair of mirrored plates, and heated with a heating plate and viflil.
A phenolic resin decorative board was produced by heating and pressurizing for 1 hour at 180°C and 120K (1/Cm') with the above-mentioned cushioning material interposed between the I board and the resulting decorative board. The properties of the plate are shown in Table 2.

In addition, in Tables 1 and 2, regarding the edge sag of plate thickness, those with a difference in thickness between the center and edge of less than 10/100 are marked O, and those with a thickness difference of 10/100 to 19/100 are marked O. Those exceeding 19/100 are indicated with a Δ mark, and those exceeding 19/100 with an X mark.
Regarding the service life, those that have been used repeatedly 100 times or more are marked O, those that have been used 50 to 99 times are marked Δ, and those that have been used less than 50 times are marked X.

[Effects of the Invention] As is clear from the above examples, according to the method for manufacturing a laminate of the present invention, the durability and heat dispersion of the cushioning material are good, so voids, stains, steam piping traces, etc. are avoided. It is possible to obtain an Iff board with a small amount of Iff and a good appearance, and also to produce a laminate having a uniform thickness with little edge sag over a long period of time with good reproducibility. Furthermore, the cushioning material is strong and can be used repeatedly, making it suitable for automation of the manufacturing process. Therefore, it can be said that the method for manufacturing a V4 laminate according to the present invention is an industrially extremely useful method.

[Brief explanation of the drawing]

FIG. 1 and FIGS. 2a and 2b are cross-sectional views of the cushioning material used in the present invention. 1... Good thermal conductor (such as an iron plate), 2... Poor thermal conductor (nonwoven fabric such as polyamide fiber).

Claims (1)

[Claims] 1. On at least one side of a sheet-like or foil-like thermal conductor,
A method for manufacturing a laminate, which comprises inserting and molding a laminated cushioning material in which paper-like or non-woven thermal conductors made of elastic fibers are laminated and integrated between a press plate and a product cover plate. 2. The method of manufacturing a laminate according to claim 1, wherein the laminated cushioning material is formed by laminating and integrating a plurality of layers of thermally good conductors and thermally poor conductors alternately.