JPS6083836A - 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] The present invention relates to a method for manufacturing a laminate obtained by laminating and molding prepregs in which a base material is impregnated with a resin and dried.

[Background technology]

Generally, it is manufactured by uniformly drying a base material impregnated with prepreg resin varnish over the entire surface, and when manufacturing copper-clad laminates using this prepreg,
It is manufactured by placing copper foil on a pre-register and molding it under heat and pressure.

However, during molding, the flow of the resin in the pudding register (6) l'i is in the direction of arrow A shown in Fig. 1, and there is almost no flow of BiIQi in the central part of the pudding register (6).
As a result, the central part of Reprej (6) could not be degassed.
There was a drawback that it remained as a void (7). and,
This caused a decline in the heat resistance and insulation properties of the manufactured laminate.

Purpose of 1 fire 1] The wood fire 4 fire was made in view of the above points, and it is made of 84 layers 4 fire that can improve the fkI thermal properties and insulation properties by heating up the voids that occur in the medium heat part. The purpose is to provide complete manufacturing methods.

1-Disclosure of shot 1jJ] In other words, misfire f! The base material +41 impregnated with the resin varnish (3) is conveyed vigorously so as to be carved on the radiation surface +21 of the radiation type dryer +11, and the resin varnish (8) is completely dried, and the base material (4) is completely dried. A radiation shielding part (5) long in the conveying direction is completely formed on the surface of the radiation surface +21 at a position corresponding to the center In in the +1J direction, and the degree of hardening of the central part is also The above-mentioned goal was achieved by creating a laminate board (6) with a low level of heat and by manufacturing the prepreg (61), which is characterized in that it is fully laminated and shaped.

The full details of the present invention will be disclosed below. As shown in FIG. Base material T41? After passing “f”,
Transfer the base material (4) into the other drying oven (8) and place the fat varnish (3) in the base material (4) in both drying ovens +81 +81.
) The wall of the drying oven (8) is provided with a Vi radiation surface + 21 opposite to it, and the
Place the resin varnish-impregnated base material (4) facing parallel to the curve (2).
) to 11! ! The resin varnish (3) is then dried by radiant heat from both radiating surfaces +21 and +21. As shown in FIG. 5, a radiation shielding part (5) is installed on the surface of the base material (4) at a position corresponding to the central part in the 1] direction of the base material (4). Congratulations! Use this radiation shielding gB+51 and 1, and use a shielding plate such as an aluminum plate, IIW, and Table 1 of Radiation 1111 (2).
Alternatively, n1 may be changed. By applying Ol and Il1 at different rates to the surface of the radiation rh+ 121 (2), use a material with a good and low emissivity to create a shape in the center of the radiation surface. You may also do so. in this way,
A radiating surface whose central part has a lower emissivity than both ends (2
) Is the radiant heat radiated from the medium heat part of the base material (4)? !
1', both ends d5 are heated, and as shown in Fig. 4, both edges in the width direction are also less hardened in the center, making it possible to create the entire repreg (6). . In the figure, (9) is a low hardening area, (to) Vi+11
+ hardening degree part. Next, add copper foil, etc. to the top 1iJ of t[il.
iV L, there is one that obtains a laminate by Japanese layer forming.However, the hardening degree of the center part is lower than that of both ends. Because the flow of resin is better than that at both ends, the resin flows first in the middle heat section, and therefore the air in the center is carried outward with the flow of resin, and the Sei 141 board is evenly defoamed. Therefore, no void (7) remains.

Next, the present invention will be specifically explained based on Examples (Examples 1 to 3, conventional examples) Thickness: Ool 5 *J
Step 4: Impregnate the base material with 50% of the rj II varnish f m fl and dry the resin varnish by passing it through a separate dryer for the entire width of the base material using one person to harden the resin at the center and both ends. P゛ has different spellings as shown in Table-1! )
Ov:.

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A thin layer molding was carried out at 120°C for 120 minutes to obtain a planed and stretched laminate.

Next, the number of voids in the rq'd 4111j stretched laminate was observed, and the heat resistance of the copper I & laminate was measured according to the JIS standard.The results are shown in Table 1. The difference in the degree of hardening between the center and both ends of the Zurizuregi is expressed by the gel time ratio of the image area. A positive value indicates that the degree of hardness in the center is higher than that at both ends, and a negative value The values indicate that the degree of hardening at the center is lower than at both ends.

Table 1 From the above results, if the gel time of the central part of the prepreg is slower than that of both ends, the mQI during molding
It was confirmed that air was removed due to the good fluidity of r, and the laminate was free of voids. Therefore, it was recognized that heat resistance was improved because there were no voids in any of the laminates from Example 1 to the convex laminate.

Effect of one shot J] In the above ↓ sea urchin main fire 8A, a radiation tracing part is formed on the surface of the radiation surface...J, and the resin varnish is impregnated with this radiation surface and the base material is completely dried. 1J force direction end tilX! The degree of hardening in the medium heat part has become low. It is very easy to make, and since the entire register is laminated, the flowability of the resin at the center of the register is better than that at both ends, so the air in the center can be easily created. At the same time, the IF is also discharged to the outside, and the laminate is free of void metal-based parts, improving the thermal properties and dielectric properties of the surface.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of a conventional example, and Fig. 2 is an illustration of the present invention-actual example.
A schematic cross-sectional view of the example, FIG. 5 is a perspective view of the main part of the same as above, and FIG. 4 is a front m1 view of the same as above. (1) is a radiation type dryer, (2) is a radiation surface, (3) is a resin varnish, (4) is a base material, (5) is a radiation shield, ([1l
The agent who will be the fd prezu cash register ㅅ [111ushi stone 1) Aburi Doyo 112j Δ 25.2 Figure 0

Claims (1)

[Claims] (1) Radiation drying The base material impregnated with resin varnish is transported so as to face the radiant surface of 1b, and the base material is dried with lIJ resin varnish. At step 119, a long radiation shield "81~" is formed in the conveying direction on the surface of the radiation surface, and the entire pre-register is created with a lower hardening strength at the center than at both ends in the middle direction. cashier'fc
A method for manufacturing a laminate, characterized by layer forming.