JPH02235629A - Preparation of laminated sheet - Google Patents

Abstract

PURPOSE:To obtain a laminated sheet wherein warpage is reduced and a long material is not broken by a method wherein a laminate wherein a metal foil is arranged to the upper or lower surface of a long strip like resin impregnated base material after squeeze-lamination to be laminated thereto is cured while continuously transferred by pinch rolls and postcured and/or cooled after curing while continuously transferred by drawing-out rolls to be cut into a required dimension. CONSTITUTION:In the curing of a long strip like laminate having a metal foil arranged and laminated to the upper and/or lower surface thereof after squeeze-lamination, curing temp. and a curing time can be selected according to the kind of a resin but the pressure at the time of curing is pref. non-pressure-40kg/cm<2> or less and can be selected according to the kind of a resin to be used. As each of pinch rolls 6, a usual one can be used as it is and a long resin impregnated base material 1 and the metal foil 3 are continuously transferred through a curing oven while tension of 20-50kg is applied to both of them per 1m in the lateral direction thereof and cured. After curing, the long resin impregnated base material and the metal foil of the long material are continuously transferred through a curing oven 7 or a cooling oven 9 while tension of 10-25kg is applied thereto per 1m in the lateral direction thereof to be postcured and/or cooled. Thereafter, the long material is cut into a required dimension by a cutter 10 to obtain a laminated sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a laminate used for electronic equipment, electric equipment, convenience stores, communication equipment, etc.

[Conventional technology]

Conventionally, laminates used for electrical equipment, etc. are made of a resin-impregnated base material and metal foil, and are pressed for a long time (
1 to 2 hours) Since it is obtained by heating and pressure molding, even if there are air bubbles in the resin-containing base material, they will be discharged from the laminate after long-term heat and pressure molding. There are no air bubbles left in the board and a dense laminate is obtained. However, when manufacturing laminates continuously, the curing process takes a long time, and the tensile stress applied to the long material increases, which remains as internal stress in the laminate and has a negative effect on warping. There was also the problem that the long material would break in the middle.

[Problem that the invention seeks to solve]

As described in the prior art section, when laminates are manufactured continuously, there are problems such as the warpage of the laminate becomes large and the long materials tend to break during the manufacturing process. The present invention has been made in view of the above-mentioned problems in the conventional technology, and its purpose is to provide a method for manufacturing a laminated board with small warpage and without breaking long materials during the manufacturing process. It is in.

[Means for solving problems]

In the present invention, after laminating a required number of long strip-shaped resin-containing substrates with a metal layer, gold j1 is applied to the upper and/or lower surfaces of the laminated substrates. A long strip-shaped laminate with foil arranged and laminated is cured while being continuously transferred with pinch rolls, and after curing is continuously transferred with a pull-out roll having a lower torque than the pinch rolls and after-cured... and/or Since the laminate manufacturing method is characterized by cutting the laminate to the required dimensions after cooling, no extra tension is applied to the long material, thus minimizing warpage of the laminate and eliminating breakage of the long material. The present invention will now be described in detail.

Examples of the strip-shaped substrate used in the present invention include glass cloth,
Glass fiber Glass base material such as glass non-woven fabric, paper, synthetic fiber cloth, synthetic fiber non-woven fabric, asbestos base, etc.
Bars, cotton cloth, etc. can be used, but it is preferable to use glass cloth, glass fiber, glass non-woven cloth, etc., which have a great thickness adjustment effect. The resin is unsaturated, l-
'IJ ester resin, diallyl fucrate resin,
Vinyl 7, Teru resin epoxy acrylate resin,
Epoxy resins, phenolic resins, melamine resins, etc. may be used alone, as a mixture, or as modified products. Also, the resin may be impregnated with only the same resin, but the primary impregnation may be with a low viscosity resin and the secondary impregnation may be with a higher viscosity resin than the primary impregnation. It is also possible to use a plurality of groups to achieve more uniform inclusion. Of course, a curing agent, a crosslinking agent, a polymerization initiator, a monomer, a diluent, etc. can be added to the resin, and additives such as inorganic powder fillers and short fiber fillers can also be added as necessary. It is. The above-mentioned resin may be used as is), but it is preferable to degas it under reduced pressure before use, since this will reduce the generation of bubbles in the resin-impregnated base material. Single, alloy, or composite foils of copper, aluminum, iron, 27-gel, zinc, etc. are used as the metal foil, and if necessary, an adhesive layer is applied to one side of the metal foil to make it more palatable. When using the squeeze roll, the resin used for the resin-impregnated base material is supplied between the long 8-band resin-containing base material and the squeeze CT-roll k, and squeeze lamination is performed while generating a resin pool. This is preferable in order to prevent the generation of bubbles in the resin-impregnated base material.The supplied resin is not limited to the resin used for the resin-impregnated base material, but it is preferable to use the same resin. ．Feeding methods include coating, casting,
Spraying, transfer, impregnating, etc. are optional, but A. Resin supply may be on one side or both sides, but there are no restrictions. H0 squeeze rolls are made of metal,
It may be made of rubber, synthetic resin, or a metal roll whose surface is lined with rubber or synthetic resin. When laminating a resin-impregnated base material and a metal foil, it is possible to create a resin accumulation between the impregnated base material and the metal foil by creating a resin accumulation between the resin-impregnated base material and the metal foil, similar to that which occurs during squeeze lamination. This is preferable in order to prevent the formation of bubbles. The laminating roll is not limited to HPC, and a normal laminating roll can be used as is.

The curing temperature and curing time of long strip-shaped laminates can be selected depending on the type of resin, but curing can be done at no pressure to 40K.
It is preferably q/cd or less, and can be selected depending on the type of resin used. As for the vinyl roll, the total one can be used as is, and it is 20 to 50K9 per meter in the width direction of one long resin-containing base material or metal foil.
The material is cured while being transferred continuously in the curing furnace under a tensile strength of 1. After curing, lO to 25K9 per meter in the width direction of the long resin-containing base material and metal foil of the long material.
The laminate is subjected to after-kinearing and/or cooling while being continuously moved through a hardening furnace and/or a cooling furnace, and then cut to a required size to obtain a laminate. Note that the laminated plate at the cutting edge can be further tightened as required to improve dimensional stability.

An embodiment of the present invention will be described below based on the illustrated embodiment.

Embodiment FIG. 1 is a simplified process diagram showing an embodiment of the method for manufacturing an NT layered plate according to the present invention.

@1 As shown in the figure, the width is 1060 m. Thickness Q. 2
104 sheets of a long strip-shaped resin-impregnated base material made by impregnating fl long glass cloth with unsaturated polyester resin containing pezoyl peroxide degassed under reduced pressure were passed through a squeeze roll 2 to obtain a resin amount of 5.
After squeeze laminating to 0 weight 'jjk%, the width iosow. A long strip-shaped laminate 5 having a thickness of 0.035ggo and laminated with a laminating roll 4 is placed with a long adhesive-layered copper foil 3, and is subjected to a tension of 180 KQ with a pinch roll 6, and continuously passed through a curing furnace 7. After curing, 90 kg of Densi B was applied with a pull-out roll 8, and heat after-cure was performed under no pressure while continuously transferring in the after-cure furnace 9.
Each 1000 x 1000 fl was cut using a cutter IO to obtain a double-sided copper-clad laminate l1 having a thickness of 1 ff.

Comparative Example The same long strip-shaped laminate as in the example was rolled at 180K using a pinch roll.
A Ryoran steel clad laminate having a thickness of 1 ff was obtained by processing Tensilon Q in the same manner as in the example except that a tension of 180 Kq was applied with a drawing roll.

The performance of the laminates of Examples and Comparative Examples is shown in Table 1.

〔 Effect of the invention〕

The present invention is constructed as described above. The method for manufacturing a laminate having the structure described in the claims has the advantage that there is no warping of the laminate and no breakage of the elongated material.

[Brief explanation of the drawing]

FIG. 1 is a simplified process diagram showing an embodiment of the method for manufacturing a laminate according to the present invention. 1 is a long strip-shaped resin-impregnated base material, 2 is a squeeze roll, 3 is a long steel foil, 4 is a laminating roll, 6 is a vinyl roll,
7 is a hardening furnace, 8 is a drawer roll, 9 is an afterkinear furnace, 10 is a counter, and 11 is a laminated plate.

Claims (1)

[Claims] (1) After squeezing and laminating the required number of long strip-shaped resin-impregnated base materials, the laminated long strip-shaped laminate with metal foil disposed on its upper and/or lower surfaces is cured while being continuously transferred using pinch rolls. . After curing, the laminate is continuously transferred using a pull-out roll having a lower torque than a pinch roll, and after curing and/or cooling, the laminate is cut into a required size.