JPH048515A - Manufacture of laminated plate - Google Patents

Abstract

PURPOSE:To reduce defects such as dents or mixing of foreign matters in a product, by a method wherein thermosetting resin solution is applied intermittently and continuously to a fiber base which is long-sized and has fixed width excepting for both side end parts, a noncoated part having a fixed width is made, a plurality of sheets of prepreg obtained by cutting the bast at the every noncoated part are piled up or metallic foils are piled up and they are heated, pressurized and molded. CONSTITUTION:Resin is applied to a long-sized base between a pickup roll 3 rotating by immersing into a resin tank 2 and a backup roll 4 rotating by coming into contact with the pickup roll 3 and cut off by a cutting machine 7 by passing through guide rolls 5, 6. When upward lifting of the backup roll 4 is performed intermittently, a noncoated part of the resin is generated by a fixed length in the meantime. Doctor blades are fixed on both end parts of the pickup roll so that the resin is not applied to both end parts of the base. The resin coated base possesses noncoated parts on its end parts on all sides at a width ratio of 0.5-20%. Obtained sheets of prepreg from an obtained resin impregnated base having fixed dimensions are piled up, hated, pressurized and molded or further copper foils are piled up, heated and pressurized, through which a laminated plate or a copper clad laminated plate is manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing a laminate without outflow of impregnated resin and thus without causing dents or foreign matter contamination.

[Conventional technology]

With the technological progress of cow conductors and the development of electronic equipment.

The demand for laminates is increasing, and there is a strong demand for higher functionality. Conventionally, the method for producing this laminate is to mold one or more sheets of prepreg obtained by continuously impregnating and drying an fM fiber base material with 4!1 fat by heating and pressing with a T-electrode.

Alternatively, metal foil is further layered on one or both sides of the prepreg and heated and pressed to produce a gold 1s recessed laminate.

[Problem to be solved by the invention]

In the production of this laminate, 1 cfi of the impregnated resin comes out of the base material during heating and pressing, causing product defects such as dents and foreign matter contamination.

This problem often occurs especially when used on thermosetting resins that are liquid at room temperature and in #solvent.

The present invention provides a method for manufacturing a laminate that does not cause the above-mentioned problems and has fewer causes of defects such as dents and foreign matter contamination! !
The entire purpose is to serve

[Means to solve all problems]

In order to achieve the above object, the present invention is to apply a thermosetting resin liquid intermittently and continuously to a long fiber base material having a constant width, excluding both sides of the fiber base material in the length direction. A non-coated part of a certain width is made for each length, and the base material is cut into each non-coated part to obtain a quadrilateral base. Multiple sheets of prepreg obtained by heating and semi-curing are stacked to form a This is a method for manufacturing laminates or copper-clad laminates in which steel foil is further layered on one or both sides and heated and pressed.0 The thermosetting resins used are phenolic resin, epoxy resin, unsaturated polyester resin, diallyl phthalate resin. , unsaturated acrylic resin, vinyl ester resin, etc. As a filler, aluminum hydroxide, clay, Merck, wollastonite, antimony trioxide, antiseptane pentoxide, or a mixture thereof. Of course it can be used.

The fiber substrate impregnated with the above resin may be a woven fabric, mat, or sintered sheet made of inorganic fibers such as glass or asbestos, or organic fibers such as polyester or polyamide.
- It is also possible to use linter paper, kraft paper, mixed paper of these, or mixed paper of paper and inorganic fibers, and it is also possible to combine these materials. Before making the entire length of the thermosetting resin, the base is pre-treated to improve the temperature resistance and punching workability of the laminate. Urea resin etc. are used.

In the present invention, the thermosetting resin is continuously applied intermittently to the fiber base material having a constant width over the entire length, and the both ends in the length direction of the base material are not coated. Occurs at regular intervals.

The resin-coated base material obtained by cutting the non-coated part at right angles to the length direction has a total width ratio of 0.5 to 2 on the four sides of the non-coated part.
It has 0%. The resin application method is screen coach-in! , O-ler': Apply intermittently and continuously using all methods such as 1-ting and kiss coating.

The prepreg obtained from the resin-impregnated base material of a certain size obtained by the above method is stacked and heated and press-molded to produce a laminate.

[Effect]

According to the method of the present invention, in order to prevent the non-woven fabric portion of the flowing resin from flowing out and being attached to the mirror plate and the hot plate, it is possible to reduce dents on the product and defects in the product A. 0 [Example] 5i of the present invention! 1 is a side view of the apparatus, and FIG. 2 is a front view thereof. The long base material 1 is immersed in a resin bath 2 and rotates in contact with a rotating pick-up roll 6.
The resin km is cut between the cloth and the guide rolls 5 and 6. It is disconnected by the IT machine 7. Backup roll 4t, as shown in Fig. 1, fry it upwards.
If done intermittently, no resin will be applied for a certain length of time.
t-Produced 0 doctor blade 9t-, as shown in Figure 2,
It is fixed independently to both ends of the pick-up roll 3 to prevent the resin from being completely applied to both ends of the base material. Next, the embodiment for the above device 112 will be fully explained. O thickness CL 25 years, weight 140 g/ Moromi's kraft paper (manufactured by Yamaba Kokusaku Pulp) was pre-treated with methylol melamine resin (8 Mame Kasei ML-630) to obtain treated paper with an adhesion resin content of 14%. This was then treated with unsaturated polyester resin (Hitachi Kasei Volise). PS-910
7) 2 parts of BPO paste (50% benzoyl peroxide) and 20 parts of hydrochlorinated aluminum per 100 parts by weight
The resin obtained by adding parts by weight is placed in the resin tank 2, and the long treated paper is passed through the device, and the cutting size is 101000 x 100.
0, Perimeter 3114 Width 50 BctvaBk impregnated base material 8 was obtained. This sample 7 was sandwiched between two casting plates with a thickness of 1 and 2 mm, and cured at 120° C. and 20 kg/U for 25 minutes to obtain a laminate.

(Comparative Example) The same resin coating as used in the example was applied to the same substrate to obtain a resin-coated surface of +000x1000 mm. After stacking seven sheets on this resin-impregnated base material', they were sandwiched between upper and lower casting plates having a total thickness of 2IV, and heated and pressed at 120° C. and 20 kg/aII for 25 minutes to obtain a laminate.

Table 1 shows the amount of resin flowing out when each of the wooden laminate samples obtained in Examples and Comparative Examples was heated and press-molded. The resin flow % in the table was obtained by (amount of M8 fat flowing out from the base material, g)/(resin-impregnated base material g).

Table 1 [Effects of the Invention] The resin flow in the VCL method of the present invention was very small, whereas the conventional method resulted in a large resin flow.

From this result, it was confirmed that the laminate produced by the method of the present invention has fewer defects due to machining dents and foreign matter contamination.

[Brief explanation of drawings]

FIG. 1 is a side view of the device of the present invention, and FIG. 2 is a front view of the device shown in FIG. 1...Base material, 2...Resin tank, 3...Pickup meal, 4...
... Back rough roll, 5.6 ... Guide roll, 7 ... Cutting machine. 8...Resin-impregnated base material, 9...Doctor blade. Figure 2

Claims (1)

[Claims] 1. Apply thermosetting resin liquid to a long fiber base material of a constant width intermittently and continuously, except for both ends in the length direction of the base material, and do not apply a constant width at every constant length in the length direction. The base material is then cut into uncoated parts to obtain a resin-impregnated base material having four non-coated parts on the four peripheries. A method for manufacturing a laminate, characterized by stacking foils and forming them under heat and pressure.