JPH0263816A - Manufacture of laminated sheet - Google Patents

Abstract

PURPOSE:To contrive energy-saving and stabilization of quality by a method wherein laminating materials obtained by impregnating fiber base materials with resin are superposed upon one another in a plurality of sets through mold release sheets, which is sent continuously between both belts, heated, pressurized and molded. CONSTITUTION:Resin is applied and infiltrated into a base material 1 such as paper and glass cloth with a resin coating and infiltrating machine 2, which is superposed upon a metallic foil from a roll 5 and a mold release sheet from a roll 6 by a superposing roll 4 after passing through a width control roll 3. At the same time, also a set of the other metallic foil and a laminated material is superposed by the superposing roll 4 and sent between a pair of endless belts 7, 7' moving over pullies 9, 9'. The same is heated, pressurized and formed during passing within a pressurizing vessel 8. The same is cut short with a cutting machine 11 after coming out of a space between belt pulleys 10, 10'.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for improving productivity in the continuous production of laminates using an endless belt method.

[Conventional technology]

Laminated boards used as electrical insulating materials are prepared by coating paper or glass fiber with a resin face, impregnating it, and drying it, then stacking the prepreg alternately with mirror plates between hot plates, and then heating and pressurizing it for a certain period of time through cushioning materials, etc. Shape. In contrast to this conventional method, in recent years a method of continuously manufacturing long laminates has been used. According to this method, the dimensions of the laminate are stable, there is little variation in quality, and productivity is good.

An example of this will be explained with reference to FIG. A plurality of base materials 1 are uniformly coated and impregnated with a resin coating device 2, and a metal foil 5 such as a copper foil and a female mold sheet 6 are bonded together by a guide roll 3 and a laminating roll 4, and a belt boot IJ 9 is applied. .10 and 9
．． At 10, it is sandwiched between endlessly driven belts 7.7'' and is heated and pressurized while passing through a pressurizing container 8 equipped with a heating and pressurizing mechanism, and is continuously shaped. A female mold sheet 6° is wound up and then cut into a certain size using a cutting machine 11.

[Problem to be solved by the invention]

The productivity of the continuous laminate manufacturing method described above is related to the moldability and curability of the resin used, and when the curing time is set to 172, the productivity doubles. The resins currently used, such as polyester, epoxy resins, and polyimide resins, are determined by the selected formulation of curing agents and curing accelerators, as well as by the properties of the laminate. Therefore, there is a limit to shortening the time required for curing and molding the resin. For this reason, a method of lengthening the pressure vessel was considered to improve equipment, but in order to double productivity, the pressure vessel should be made longer.
In addition to doubling the length, it is also necessary to quadruple the length of the endless heald, which requires capital investment.

In view of the above points, the present invention provides a method for efficiently manufacturing a laminate.

[Means to solve the problem]

The present invention combines a plurality of laminated materials in which a required number of resin-impregnated base materials, which are obtained by coating and impregnating a certain amount of resin on a fiber base material, with a metal foil such as a copper foil, is combined via a female mold sheet, and then This is a continuous Vt manufacturing method in which the material is sent to a pair of endless healds, heated and pressurized by a liquid pressure medium, and molded, thereby simultaneously producing several laminates.

Next, embodiments of the present invention will be described with reference to the drawings.

In FIG. 1, a base material 1 such as paper or glass cloth is coated and impregnated with a resin using a resin coating/impregnating machine 2, and then passed through a width adjusting roll 3 and a mating roll 4 where a metal foil from a roll 5 and a female foil from a roll 6 are coated. At the same time, other sets of metal foils and laminated materials are also combined with the mold sheet by a combination roll 4 and a pulley 9,
It is sent between a pair of endless healds 7.7' moving by 9'. It is heated and pressurized while passing through the pressurized container 8 and is formed. After exiting between 0.10' and 1/2, the cutter 11 cuts it short.

The pressurized container 8 used in the present invention is a sealed container in which a heated and molten medium is pressurized, and a heald with a laminated material sandwiched therebetween moves through a through hole in the heald advancing direction. The medium in the openings serving as the inlet and outlet is cooled and solidified by the cooling mechanism, and the heated melting medium in the center is sealed. Paraffin, polyethylene wax, etc. are used as the medium, but it is preferable to use a medium that is solid at room temperature, becomes liquid when heated, and is stable at the heating temperature (those with a melting point of 50 to 120°C and liquefied at 60 to 200°C are preferable).

The metal foil is copper foil, A1 foil, etc., and the female mold sheet is Tedra film, triacetate film, polyester film, cellophane paper, etc.

The resins are thermosetting resins (epoxy, phenol, unsaturated polyester, acrylic ester resins, etc.) and thermoplastic resins (vinyl chloride, polyethylene, polypropylene, etc.), but in addition to these, SMC1 metal plates, sheet-like wood materials, Ceramic green sheets, constituent materials of multilayer wiring boards, etc. are used. Multilayer wiring boards are applicable only when smoothness is required on only one side. If you select a female type, one or more inner layer circuit boards with the necessary circuit pattern formed on one or both sides of the board are stacked together via a resin-impregnated base material, and one or more inner layer circuit boards with the necessary circuit pattern formed on one or both sides of the board are stacked together via a resin-impregnated base material. Alternatively, double-sided circuit boards, single-sided or double-sided copper-clad laminates, etc. can also be formed.

[Example 1] Thickness 0.18mm, width 1050m, weight 200g/-
A liquid grease containing an epoxy resin, a curing agent, and a curing accelerator was uniformly applied to a cloth made of glass fibers treated with epoxy silane using a coating device so that the amount of resin was 50% by weight. These two resin-impregnated base materials were sandwiched between an endless belt together with a 0.0035 mm copper foil and a 0.020 mm Tedra film, and heated in a heated and pressurized container at a pressure of 20 kg/cm.
continuous molding was performed at a temperature of 175° C. and a heating time of 3 minutes. As a result, a copper-clad laminate having a thickness of 0°4511 mm was obtained.

The characteristics of this laminate are the multilayer material FR produced using a multistage press.
4 (NEMA standard).

[Example 2] Two resin-impregnated base materials made of the same glass fiber cloth as described in Example 1 and treated with the same resin, and the same resin-impregnated material as described above centered on the female type (triacetate film 0.038 m). Layer two base materials and add 0-035 xm on the outer surface.
The copper foil was rolled together and sent to an endless belt. Pressure: 30Kg/cj, temperature: 180Kg/cj using a heated and pressurized container
The molding was carried out at a temperature of 4 minutes. Furthermore, a laminated plate was obtained by cutting a long laminated plate continuously molded into short pieces.

The properties of this laminate are equivalent to those of the multilayer material FR4 produced by multiple pressings, similar to the examples.

〔Effect of the invention〕

The present invention improves productivity in the continuous lamination method, and simultaneously produces multiple copper-clad laminates under the same conditions, thereby saving energy and stabilizing quality. The amount of mold sheets, etc. used is reduced to 1/2, and manufacturing costs are reduced.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a continuous laminate manufacturing apparatus of the present invention, and FIG. 2 is an explanatory diagram of a conventional laminate continuous manufacturing apparatus.

Claims (1)

[Claims] 1. In the production of laminates, which are continuously formed by feeding the laminate material between a pair of vertical endless belts and applying heat and pressure from both belt surfaces, the laminate material is made by impregnating the fiber base material with resin into a female mold. A method for continuously manufacturing a laminate, characterized by stacking a plurality of sets with sheets interposed therebetween, and continuously feeding the sets between both belts to form them by heating and pressing.