JP2003211599A - Cushion material for molding laminate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cushion material for molding a laminate having rock wool as a base, in which a sheet with a glass cloth and a non-woven fabric or an aramid cloth or a non-woven fabric coated or impregnated with a fluororesin is provided as a surface layer. <P>SOLUTION: The cushion material for molding the laminate has a structure of a molding cushion material for a laminate to be formed by heat and pressure molding in a parallel plate. The cushion material for molding the laminate is constituted by rock wool and a surface layer sheet, and the surface layer sheet is comprised of a fluororesin and a base material. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cushion material formed by heating and pressing a plate-shaped laminate decorative plate, an insulating plate, a copper-clad laminate for a printed circuit board, a multilayer printed wiring board and the like with parallel plates.

[0002]

2. Description of the Related Art Conventionally, decorative boards, copper-clad laminated boards, multilayer wiring boards (collectively referred to as laminated bodies hereinafter), etc., are sandwiched between one or more parallel heat plates and heating elements, and heated and pressed. Is molded and manufactured. In such a manufacturing method, the cushion material for a laminated body transfers uniformly and mildly the buffer material for uniformly pressing the uneven state of the parallel heating plates to the laminated body and the heat for heating the laminated body. Is used for. Commonly used cushioning materials for forming laminates include paper, heat resistant rubber, polyamide woven fabric, felt, fluororesin plate, rock wool, etc., or a composite thereof.
Are known.

[0003]

This cushioning material for molding a laminate can withstand a pressure of about 14 MPa or less,
Withstand lamination heating conditions of approximately 200 ° C or less (240 ° C depending on the type of laminate). In addition to paper, it is required to be used multiple times (several hundred times from the price) because of its economic need, and in recent years, laminates that meet these requirements have been adopted. . Furthermore, the cushioning (cushioning) is partially insufficient due to the adhesion of resin and foreign matter such as foreign substances generated during molding of the laminated body, scratches due to the contact between the equipment and the cushioning material, collision dents during handling such as movement of manufacturing processes and handling of sets. For example, it is required that deterioration due to occurrence does not occur easily. When this resin adheres, if it is pressed as it is, excessive pressure may concentrate on the resin portion, and a local dent may occur. In particular, the rock wool-based cushioning material is brittle in nature, so partial pressure causes partial fracture.
When the surface layer of the cushioning material is too hard (not harder than metal), contact with the device, etc. causes damage to the surface layer, partial dents and deterioration during repeated use, affecting the laminate, and causing unevenness, This may result in defects such as remaining bubbles in the laminate.

[0004]

In order to solve this problem, the present invention provides a cushioning material based on rock wool in which a surface layer is coated with a fluororesin such as glass cloth and non-woven cloth or aramid cloth and non-woven cloth coating or impregnation. This is a structure for arranging the made sheets. Due to the excellent releasability of the fluororesin of that configuration (the property that substances such as resin do not adhere), the resin and dust from the laminate will not adhere to the cushion material, and even if they are placed on the upper side Resin, dust, etc. can be easily removed. Due to the soft characteristics of the surface fluororesin sheet of the hard rock wool material, it is possible to obtain an effect that scratches and unevenness are unlikely to occur even when it comes into contact with metal such as stainless steel in handling.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention is a structure of a cushioning material for forming a laminate to be heat-pressed by a parallel plate, which comprises rock wool and a surface layer sheet. In the structure, the resin of the surface layer sheet is a cushioning material for forming a laminated body composed of a fluororesin and a base material, and a laminated laminate decorative plate, an insulating plate, a copper clad laminated board for a printed circuit board, a multilayer It is a product having the function of a cushion (cushioning material) that heats and pressurizes a printed wiring board or the like with parallel plates. Hereinafter, an embodiment of the present invention will be described with reference to FIG.
Will be explained.

FIG. 1 shows a cushion molding material for forming a laminated body. In FIG. 1, a rock wool portion (2) is a base material of the cushion material, and buffers unevenness which obstructs parallelism of a hot plate or the like and heats it. The heat source (when cooling, the cooling source) is mildly and uniformly transferred. The rock wool part is made of aramid fiber paper or cloth and is made of rock wool and made to have a predetermined thickness. The surface layer sheet (1) has a function of preventing adhesion of resin, dust and the like to the surface, easiness of cleaning at the time of adhesion, scratches at the time of contact, and prevention of dents, and is composed of a fluororesin and a glass base material. . In the above description, the surface layer sheet is described as an example in which the fluororesin and the glass base material are arranged on both sides, but the same applies even if the other glass base material is an aramid base material or only one side or both sides are different. Can be implemented in

[0007]

EXAMPLES Next, specific examples of the present invention will be described. Example 1 The cushioning material for forming a laminated plate of the present invention has a base material of rock wool material: RA board 1.6 mm product (manufactured by Mitsubishi Paper Mills Ltd.), surface sheet; fluororesin impregnated sheet AGF-1.
00A, 0.18 mm (manufactured by Chukoh Chemical Industry Co., Ltd.) was placed on both sides, and was heated and pressurized for 120 minutes under a pressure of 8 MPa and a maximum temperature of 190 ° C. with a laminating hydropress, and then cooled to 40 ° C. A 520 mm square cushion material was prepared. Using the cushion material thus prepared, the multilayer printed circuit board 4 is laminated under the multilayer printed circuit board lamination conditions shown in Table 1.
The inner layer of the laminated plate was created. The 4-layer board is a copper-clad laminated board MCL-
E-67, 0.8 mm, 35 μm Double-sided product (manufactured by Hitachi Chemical Co., Ltd.) Circuit processed product, prepreg GEA-67N for multilayer adhesion, 0.2 mm (manufactured by Hitachi Chemical Co., Ltd.) on both sides , Further electrolytic copper foil Y on the top and bottom
This is a configuration (finished design plate thickness 1.58 mm) in which a GP 18 μm foil (manufactured by Nippon Electrolytic Co., Ltd.) is arranged. This four-layer board production was repeated 50 times, 100 times, and 200 times, and the change in the thickness of the four-layer board, the presence / absence of molding voids, the deterioration of the cushion material, the adhesion of dust, and the confirmation of cleanability were evaluated.

Comparative Example 1 For comparison with the cushioning material for forming a laminated plate of the present invention, the base material was the same rock wool material as in Example 1; RA board 1.
A 6 mm product (manufactured by Mitsubishi Paper Mills Co., Ltd.) is used, a surface sheet; Nomex cloth 0.2 mm (manufactured by Teikoku Textile Co., Ltd.) is placed on both sides, and 8MP is applied by a laminating hydropress.
After heating and pressurizing for 120 minutes under the condition of the pressure a and the maximum temperature of 190 ° C., it was cooled to 40 ° C. to prepare a 520 mm square cushion material. Using the cushion material thus prepared, a multilayer printed circuit board four-layer board was prepared under the multilayer printed circuit board laminating conditions shown in Table 1 as in Example 1. This four-layer board production was repeated 50 times, 100 times, and 200 times, and the change in the thickness of the four-layer board, the presence or absence of molding voids, and the deterioration and cushioning of the cushion material, the adhesion of dust, and the cleanability were confirmed and comparatively evaluated.

[0009]

[Table 1]

[0010]

As described above, according to the present invention, in the evaluation of the cushion appearance of Table 1 and the like, the cushion material of Example 1 is used more than once and the resin adheres more than the cushion of Comparative Example 1. However, there was little dust adhesion, and even if it did, cleaning was easy. Since there is little adhesion of resin and dust, dents are extremely rare even after repeated use. In the cushion of Comparative Example 1, since the surface layer sheet is a Nomex cloth, the fibers are exposed, so that resin, dust, and the like are easily entangled, and as a result, they are easily attached and difficult to remove. Therefore, it could be observed that as the number of times of use increased, the surface became uneven. Thus, the first embodiment of the present invention
The above-mentioned cushion material has the above-mentioned advantageous effects as compared with the cushion material using the conventional rock wool.

[Brief description of drawings]

FIG. 1 shows a cushioning material for forming a laminate according to an embodiment of the present invention in FIG.

[Explanation of symbols]

1 Fluororesin glass cloth sheet 2 Rock wool (composed of rock wool and aramid cloth) 3 glass cloth

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 4F100 AC10A AG00B AG00C AK17B                       AK17C AK47B AK47C BA02                       BA03 BA06 BA13 DG01B                       DG01C DG11B DG11C DG15B                       DG15C EJ17 EJ42 EJ50                       EJ82B EJ82C GB90 JK11                       JL06 JL14                 4F204 AA36 AD03 AD16 AG03 AH36                       FA01 FB01 FB11 FN11 FN15                       FQ19

Claims (4)

[Claims] 1. A structure of a cushioning material for forming a laminated body which is heated and pressure-molded by parallel plates, wherein the resin of the surface layer sheet comprises a fluororesin and a base material in a structure comprising rock wool and a surface layer sheet. A cushion material for forming a laminated body that is configured as follows. 2. A cushion forming material for a laminate, wherein the base material of the thermoplastic impregnated sheet according to claim 1 is a glass cloth and a glass non-woven cloth or an aramid resin fiber cloth and an aramid resin fiber non-woven cloth. 3. The cushioning material for forming a laminate, wherein the resin of the thermoplastic impregnated sheet according to claim 1 is a fluororesin. 4. The laminated sheet according to claim 1, wherein the thermoplastic impregnated sheet is provided on both sides of rock wool, and one or more base materials according to claim 2 are used. Cushion material for molding Cushion material for molding laminates.