JPH0433855A - Manufacture of metal foil-plated laminated plate - Google Patents

Abstract

PURPOSE:To eliminate contaminations of a device and the surface of a laminated plate from the end of a laminated base material at the time of molding by continuously superposed filmlike materials on metal foils of both side edges of the long base material in a pressure zone of a heating and pressurizing apparatus so as to be extended from the outside of the end of the base material, heating, and pressure molding it. CONSTITUTION:A long laminated base material made by laminating resin- immersed base materials 1, 1', 1'' in which long fibrous base materials are continuously immersed with resin solution, and laminating long metal foils 2, 2' simultaneously or thereafter, is introduced into a double belt press. In the case of heating and press-molding it, materials 2, 3', 3'', 3''' are continuously superposed on the metal foils of both side edges of the base material simultaneously or before the base material is introduced to the press so as to be extended from the outside of the end of the base material.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for continuously manufacturing metal foil-clad laminates in which contamination due to resin leakage is reduced.

(Prior technology) As a method for continuously manufacturing laminates, long resin-impregnated base materials are continuously conveyed, overlapped, and laminated base materials laminated with metal foil, etc., are continuously heated and pressed using a continuous heating and pressurizing device. A method of curing under heat and pressure is known.

(Japanese Unexamined Patent Publication No. 10456/1983, etc.).

(Problems to be Solved by the Invention) However, in these methods, (1) the equipment and the surface of the laminate are contaminated by the resin flowing out from the end of the laminated base material during hot-pressure molding; (2) the equipment is contaminated; and the laminate are bonded,
When the laminate is removed from the heating and pressurizing equipment, it is distorted.
It has the disadvantage that it tends to cause problems such as warping.

(Means for Solving the Problem) As a result of intensive research in view of the above situation, the present inventors found that metal foil on both sides of a long laminated base material within the pressure zone of a heating and pressurizing device. When a film-like material is continuously layered on top of the long laminated base material so that the film-like material protrudes outward from the end of the long laminated base material, and is heated and press-molded, the film-like material is heated and press-molded from the end of the laminated base material during molding. The inventors have discovered that the resin that has flowed out flows only onto the film-like material that protrudes outward from the end of the laminated base material and does not contaminate the equipment or the surface of the laminated plate, leading to the completion of the present invention.

That is, the present invention provides a method for manufacturing a metal foil-clad laminate in which a long laminated base material in which metal foil and a plurality of resin-impregnated base materials are laminated is continuously heated and pressure-molded. After continuously overlapping each long film-like material on the metal foil on both side edges of the material so that the film-like material protrudes outward from the end of the long laminated base material, The present invention provides a method for manufacturing a metal foil-clad laminate, which is characterized by continuous heating and pressure forming.

The resin-impregnated base material used in the present invention is one that is impregnated with a resin liquid and can be molded under heat and pressure, such as a fibrous base material impregnated with a predetermined amount of resin liquid, or a fibrous base material that can be preheated and made to be cook-free. Examples include prepreg, which has been converted into

Typical examples of the fibrous base material used here include glass fiber, carbon fiber, and aromatic polyamide thread fiber, with glass fiber being particularly preferred. Among these glass fibers, there are E-glass, C-glass, A-glass, S-glass, etc. from the viewpoint of raw materials, and any of them can be used in the present invention.

These fibrous base materials include roving, chopped strand cloak, continuous cloak, cloth, non-woven fabric, roving cloth, surfacing cloak, and chopped strand depending on their shape. They are appropriately selected depending on the intended use and performance of the molded product, and if necessary, a mixture of types or shapes on two sides may be used, but a chronoscopic nonwoven fabric is preferred.

The resin liquid may be thermosetting and liquid that can be impregnated into the fibrous base material, such as a solid resin dissolved in a solvent or a solid component dispersed in the liquid. It may be something that Examples include solvent-containing or solvent-free liquid resin compositions containing phenol resins, melamine resins, epoxy resins, unsaturated polyester resins, epoxy vinyl ester resins, polyimide resins, diallyl phthalate resins, etc. as soil components. These resins may be used either in Chinese or in combination. t; δ
When a solvent is used on the diluting side, it is necessary to remove the solvent before laminating the metal foil or cover film to the outermost layer of the resin-impregnated base material laminate.

Metal foils include long copper foil, aluminum foil, brass foil,
Stainless steel foil, nickel foil, etc. are used, and an adhesive may be applied to the back surface as necessary.

Further, the film-like material used in the present invention is not particularly limited as long as it is film-like, but representative examples include polyethylene film, polypropylene film,
Examples include plastic films such as polyethylene terephthalate film, volumetric film, polyfluorinated ethylene film, polyimide film, and nylon film. Although the thickness of the film-like material is not particularly limited, it is usually 5 to 500 μm.

Further, a typical example of the continuous heating and pressurizing device used in the present invention is a double belt press machine whose pressurizing method is a surface pressure method.

A double belt press machine has a pair of endless healds that run opposite each other, and continuously heats and presses the laminate by introducing it between the endless belts.

In order to obtain a laminate using the manufacturing method of the present invention, for example, as shown in FIG. At the same time or after that, a long laminated base material made by pasting together a 2.2" long length of metal foil, etc. is introduced into a double-held press machine, and when hot and pressure molding is performed, the laminated base material is Before and at the same time before being introduced into the double belt press, films 3.3' were applied onto the metal foils on both side edges of the laminated base material, respectively.

3'' 3 II+ may be continuously stacked on top of each other so that the film-like material protrudes outward from the edge of the laminated base material.

By doing this, the endless held 4 as shown in Fig.
, 4'' and the laminated base material, four film-like materials are interposed between them.

At this time, the width of the laminated base material is 4.4 mm for the endless belt.
It is preferable that the belt be at least 1 cm narrower than the width of the endless belts 4, 4' and arranged in the center of the endless belts 4, 4' in the direction of movement thereof. Also, film-like material 3゜3゛, 3” 3 +++
The width L1 of the part overlapped with the laminated base material and the width L2 of the part protruding from the end of the laminated base material are appropriately determined depending on the flow characteristics of the resin when heated and pressurized, and are not particularly limited. In case, L is 1 to 5 cm, Lz is 1 to 15 cl11
is within the range of

In addition, unlike the above case, when pasting metal foil on only one side of the laminated base material, place a cover film on the other side so that both ends of the cover film protrude outward from both ends of the laminated base material. It is preferable to paste them together. In this case, it is not necessary to overlap the film-like material on both side edges of the surface to which the cover film is pasted.

Furthermore, if the total thickness of the film-like materials superimposed on both side edges of the laminated base material is 0.1 mm or more, the pressure applied to both side edges of the laminated base material will increase, resulting in molding. This has the effect of reducing the amount of resin flowing out when

(Example) Next, the present invention will be specifically described with reference to Examples and Comparative Examples. In addition, parts indicate parts by weight, and % indicates weight %.

Example 1 42.7 parts of a brominated bisphenol A epoxy resin with an epoxy equivalent of 685 and a bromine content of 24% and an epoxy equivalent of 2
7.5 parts of cresol novolak type epoxy resin No. 10 dissolved in 35.0 parts of methyl ethyl ketone,
2.0 parts of dicyandiamide and 5.0 parts of dimethylformamide.
curing agent composition dissolved in 0 parts and 15.0 parts of methyl cellosolve and 0.1 parts of 2-ethyl-4-methylimidazole.
5ffl was added to obtain an epoxy resin liquid.

Apply this epoxy resin liquid to a width of 620mm and a thickness of 0.18+m.
m long glass cloth was impregnated continuously, and then heated continuously in a dryer at 150 °C under conditions such that the residence time was 4 minutes to remove methyl ethyl ketone, dimethyl formamide, and methyl cellosolve. A long epoxy resin-impregnated base material having a resin weight fraction of 43% was obtained.

Four sheets of this epoxy resin-impregnated base material are laminated, and long copper foils with a width of 620 mm and a thickness of 18 μm are layered on top and bottom of the laminated base material to obtain a laminated base material. Then, a polyethylene terephthalate film with a thickness of 40 μm and a diameter of 90 mm was used, the width of the part overlapped with the laminated base material (L,) = 30 mm, and the width of the part protruding from the end of the laminated base material (Lz) - While stacking them so that they are 60 mm wide, they are placed in a double helt press machine with an endless belt 700 mm wide, and heated at a temperature of 170° and a pressure of 20°.
After heat-pressing molding was carried out under the conditions of kgf/cm2 and residence time of 20 minutes, the product was cut into pieces of 500 mm in length using a guillotine cutter to obtain copper-clad laminates measuring 500 mm x 620 mm.

The amount of resin flowing out during molding of the copper-clad laminate obtained in this way,
The amount of resin adhering to the surface of the copper-clad laminate and the amount of warpage were measured.

The amount of warpage was obtained by placing the laminate on a flat surface plate and measuring the maximum amount of lift in the four corners of the laminate.

The results are shown in Table 1. Note that the values in the table are the average values of 20 sheets.

Comparative Example 1 A copper-clad laminate was obtained in the same manner as in Example 1 except that the overlapping of the polyethylene terephthalate film was omitted, and the amount of resin flowing out during molding, the amount of resin attached to the surface of the copper-clad laminate, and the amount of warpage were measured. did. The results are shown in Table 1.

Table 1 (Effects of the Invention) According to the present invention, since film-like materials are superimposed on both side edges of the laminated base material when hot-pressing the laminated body, there is no staining due to resin leakage, and there is no warpage. It is possible to obtain a laminate with less dust, and the equipment is not contaminated.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view when a double-held press is used as the method for manufacturing the laminate of the present invention. 1.1', 1"...Resin-impregnated base material 2.2"...Metal foil 3.3', 3" 3 Il+...Film-like material 4.4"...Endless belt L1...・Width L2 of the film-like material at the part overlapped with the laminated base material ...Width of the film-like material at the part protruding from the edge of the laminated base material Agent Patent attorney Masaru Takahashi First time 1 L2

Claims (1)

[Scope of Claims] 1. In a method for manufacturing a metal foil-clad laminate in which a long laminated base material in which a metal foil and a plurality of resin-impregnated base materials are laminated is continuously heated and pressure-molded, a long A long film-like material was continuously superimposed on the metal foil on both side edges of the laminated base material so that the film-like material protruded outward from the end of the long laminated base material. A method for manufacturing a metal foil-clad laminate, which is then continuously heated and press-formed. 2. The manufacturing method according to claim 1, wherein the method is continuously heated and cured using a surface pressure type heating and pressing device.