JPH07232404A - Manufacture of laminated sheet - Google Patents

Abstract

PURPOSE:To produce a metal foil clad laminated sheet reduced in the adhesion amt. of a contaminant or deposit and stable in quality by preventing the resin flowing out of a resin impregnated base material from adhereing to a roll. CONSTITUTION:In manufacturing a laminated sheet by continuously and integrally laminating a plurarity of base materials impregnated with a resin and copper foil, a sheet material 15 receiving the resin flowing out of the end parts of the resin impregnated base materials 1 is arranged to the underside of the resin impregnated base materials to be superposed when the resin impregnated base materials 1 are integrally laminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a laminated board used as a substrate for a printed wiring board or the like.

[0002]

2. Description of the Related Art In a conventional method for producing a laminated plate by a continuous method, a long base material such as glass cloth, glass nonwoven cloth or paper is used. As shown in FIG. 4, the long strip-shaped base material (1) is continuously fed out from a state where it is wound around a base material roll (2), and is immersed in an impregnation tank (3) containing a liquid resin. The material (1) is impregnated with a liquid resin such as a thermosetting resin, and the required number of long resin-impregnated base materials (1) impregnated with the resin are squeezed rolls (4).
The resin is squeezed and overlapped to be integrated, and a long metal foil (7) is formed on one surface, and a long release film (7) and a long metal foil (7) are formed on the other surface. After heat-curing in a curing furnace (8) while continuously moving the laminated strip-shaped laminated body (11) that is laminated with either one and passed between the laminated rolls (5) arranged above and below A method is known in which a metal foil-clad laminate is continuously manufactured by cutting to a required size with a cutting machine (10).

In the above-mentioned continuous laminated plate manufacturing method, the resin of the resin-impregnated base material remains in a liquid state and the squeeze roll (4).
Therefore, the resin-impregnated base material pressed by the squeeze roll (4) had excess resin flowing out from the end. However, the outflow of this resin is not repaired only at the squeeze roll (4) but remains in the curing furnace (8) of the next step, and the resin is discharged from the support roll (9) in the curing furnace (8). There was a problem that the resin adhered to the surface. The resin adhering to the surface of the support roll (9) in the curing furnace (8) is cured by the temperature in the furnace, and is deposited on the surface of the support roll (9), or the resin cured by deposition is further heated. In some cases, it was carbonized by the addition of and added to the resin-impregnated base material. Therefore, as shown in FIG. 5, the width of the support roll (9) is 5 to 30 mm larger than the width of the base material.
It was manufactured using a small one. When manufactured by this method, the resin flowing out from the end of the resin-impregnated base material does not adhere to the surface of the support roll (9) but accumulates on the resin receivers (14) provided on both sides of the support roll (9). ,
When the laminate (11) meandered, the resin adhered to the surface of the support roll as described above, and stable production could not be performed.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to prevent the resin flowing out from a resin-impregnated base material from adhering to a roll. It is an object of the present invention to provide a method for producing a metal foil-clad laminate having a stable quality with less dirt and deposits.

[0005]

A method for manufacturing a laminated plate according to claim 1 of the present invention is a laminated plate in which a plurality of base materials impregnated with a resin and a copper foil are continuously integrated to form a laminated body. In the manufacturing method of 1., when a plurality of base materials (1) impregnated with the above-mentioned resin are integrated, the resin-impregnated base material (1) is overlaid and flows out from the end of the resin-impregnated base material (1). The sheet material (15) for receiving the resin is arranged.

Further, the method for manufacturing a laminated board according to a second aspect of the present invention is characterized in that the sheet material (15) is either a polyethylene terephthalate sheet or a polyfluoroethylene sheet.

Further, in the method for manufacturing a laminated board according to claim 3 of the present invention, the metal foil (12) constituting the laminated body is used as the sheet material (15), and an end portion of the metal foil (12) is used. Is bent upward.

[0008]

According to the method of manufacturing a laminated board of the present invention, when a plurality of resin-impregnated base materials are integrated, a sheet material for receiving the resin flowing out from the end to the lower part of the resin-impregnated base material to be laminated. Since (15) is arranged, the resin flowing out from the end portion is received by the sheet material and prevented from flowing out to another,
Prevents resin from adhering to the surface of the support roll.

The sheet material (15) is preferably a polyethylene terephthalate sheet or a polyfluoroethylene sheet, and further, the metal foil (12) constituting the laminate is the sheet material (15).
It is preferable that the end portion of the metal foil (12) is bent upward and used.

The present invention will be described in detail below. Figure 1
It is process drawing of the manufacturing method of the laminated board of one Example of this invention.

As shown in FIG. 1, a plurality of long strip base materials (1) are continuously fed from a state where they are wound on a base material roll (2), and an impregnation tank (3) containing a liquid resin is provided. A plurality of base materials (1) are impregnated with the resin by immersing the base material in the base material.
The long strip base material (1) is made of inorganic fiber such as glass, saturated polyester, polyacryl, polyvinyl alcohol, polyamide, polyimide, polyphenylene sulphite, organic synthetic fiber such as urethane and natural fiber such as cotton. Woven cloth, non-woven cloth, matte or paper, or a combination thereof is used.

As the resin to be impregnated into the above-mentioned substrate, any one of unsaturated polyester resin, epoxy resin, vinyl ester resin, phenol resin, polyimide resin, polyphenylene ether resin, fluororesin, etc. is used alone, as a modified product or a mixture. be able to. Further, if necessary, a filler such as aluminum hydroxide, clay, talc, silica, alumina, magnesium carbonate, calcium carbonate, synthetic resin powder or a hollow body such as glass can be added to the above resin.

The plurality of base materials (1) impregnated with the resin as described above are sent to the squeeze roll (4), and the excess resin is superposed while adjusting the squeezing thickness.

Next, metal foils (7) and (12) such as long copper foils fed from the metal foil roll (6) are laid on the outer surface of the resin-impregnated base material of the outermost layer. At this time, the long sheet material (15) fed from the sheet material roll (16) so as to be located under the metal foil (12) is sent to the laminating roll (5) together with the metal foil (12). As described above, the laminated body (11) in which the plurality of resin-impregnated base materials, the metal foil (7) and the sheet material (15) are stacked is continuously fed to the curing furnace (8).

The laminated body (11) having the sheet material (15) arranged at the lower part is on the surface of the support roll (9) in the curing furnace (8) and the cross section thereof is as shown in FIG. Since 15) covers the periphery of the end of the laminate (11), the resin is prevented from flowing out to the surface of the support roll (9). Further, the resin is heated and cured in the curing oven (8), and the plurality of resin-impregnated base materials, the metal foil (7) and the sheet material (15) are integrally laminated. The laminate (11) continuously coming out of the curing furnace (8) is cut into a predetermined size by a cutting machine (10) to obtain a metal foil-clad laminate serving as a substrate for a printed wiring board.

The sheet material (15) is preferably a polyethylene terephthalate sheet or a polyfluoroethylene sheet. Even if only the end portion of the laminate (11) as shown in FIG. 2 is covered, the end portion and the lower surface are combined. Even if it covers the entire surface, its size is not particularly limited as long as it covers the end portion.

As the sheet material (15), the laminated body (1
It is also preferable to use the metal foil (7) which is a component of 1). In the above manufacturing process, the metal foil (12) of the laminate (11) fed from the laminating roll (5) is moved to the upper side by guide rolls (not shown) attached to the left and right sides on the exit side of the laminating roll (5). It's a fold,
A laminate (1 in which the end of the metal foil (12) is bent upward
1) is on the surface of the support roll (9) in the curing furnace (8), and the resin does not flow out to the surface of the support roll (9) due to the bent metal foil (12) as shown in FIG. It is like this.

A metal foil (1 having the above end bent upward)
2) can be obtained by pressing the end portion of the metal foil (12) with a guide roll as described above, and the number of guide rolls and the mounting angle are changed according to the thickness of the copper foil and the bending angle. can do. Alternatively, it can be obtained by using a metal foil (12) whose end is bent more than before use, or by pressing the end of the metal foil (12) with air.

[0019]

EXAMPLES The present invention will be described in detail below with reference to examples.

Example 1 As a resin composition, 100 parts by weight of unsaturated polyester (Takeda Polymer 6320F manufactured by Takeda Pharmaceutical Co., Ltd.), 1 part by weight of benzoyl peroxide and 20 parts by weight of aluminum hydroxide were blended. And the resin amount is 4
The base material was impregnated so that the content of the resin was 5% by weight, and as another resin composition, a vinyl ester resin (R-80 manufactured by Showa High Polymer Co., Ltd. was used.
6DA) to 100 parts by weight, coumer hydroperoxide to 1 part by weight, and styrene added so that the viscosity at 25 ° C. becomes 5 poises, and used as a base material so that the resin amount becomes 30% by weight. Impregnated. Width 10 as this base material
50 mm glass cloth (WE-18K- manufactured by Nitto Boseki Co., Ltd.)
BS) was used.

The three resin-impregnated resin-impregnated substrates (1) thus impregnated with resin were sent to a squeeze roll (4), and excess resin was superposed while adjusting the squeezing thickness. .

A long metal foil (7) fed from a metal foil roll (6) has a width of 1060 mm and a thickness of 18 μm.
Was laminated on the upper and lower outer surfaces of the base material impregnated with the resin of the outermost layer, and the polyfluoroethylene sheet was further laminated on the lower position of the lower copper foil and sent to the laminating roll (5). The laminated body (11) which was piled up was continuously sent to the hardening furnace (8), the resin was heat-hardened in the hardening furnace (8), and the board thickness 0.6 mm of the copper clad laminated board was obtained. The temperature of the curing furnace (8) had a maximum temperature of 160 ° C and a minimum temperature of 60 ° C.

The laminated plate was manufactured as described above, but the resin flowing out from the end portion of the base material (1) was cured on the polyfluoroethylene sheet, and the resin in the support roll (9) in the curing furnace (8) was cured. No adhesion of the resin was found on the surface.

Example 2 Using the same materials and impregnation as in Example 1 above, three resin-impregnated resin-impregnated base materials (1) were sent to a squeeze roll (4), and excess resin was squeezed to a thickness. Was adjusted while overlapping.

Further, a copper foil having a width of 1060 mm and a thickness of 18 μm as a long metal foil (7) fed from the metal foil roll (6) is laminated on the outer surface of the base material impregnated with the resin of the outermost layer and laminated. Sent to roll (5). The laminated body (11) is laminated by the guide rolls attached to the left and right sides of the exit of the laminating roll (5).
The lower copper foil (12) of 1) was bent upward at an angle of 45 ° with respect to the horizontal plane and continuously sent to the curing furnace (8). Then, the resin is heated and hardened in the hardening furnace (8), and the thickness of the plate is reduced to 0.
A 6 mm copper clad laminate was obtained. The temperature of the curing furnace (8) had a maximum temperature of 160 ° C and a minimum temperature of 60 ° C.

The laminated plate was manufactured as described above. However, since the lower copper foil (12) has a bending on the upper side, the laminated body (1
The resin flowing out from the end of 1) was cured on the lower copper foil (12), and no resin adhered to the surface of the support roll (9) in the curing furnace (8).

[0027]

According to the method for manufacturing a laminated board of the present invention, when a plurality of base materials impregnated with a resin and a copper foil are integrated, a plurality of base materials impregnated with the resin and a metal foil are integrated. When the sheets are integrated, by arranging the sheet material under the resin-impregnated base material to be superposed, the resin flowing out from the end portion of the laminated body made of the resin-impregnated base material is received on the sheet material. The resin does not adhere to the surface of the support roll in the curing oven, and a stable and constantly laminated surface can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic view of a method for manufacturing a laminated board according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a metal foil-clad laminate board mounted on a support roll in a curing oven according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of a metal foil-clad laminate board mounted on a support roll in a curing oven according to another embodiment of the present invention.

FIG. 4 is a process drawing of a method for manufacturing a laminated board according to an embodiment of the present invention.

FIG. 5 is a cross-sectional view of a metal foil-clad laminate board mounted on a support roll in a curing furnace according to a conventional example.

[Explanation of symbols]

 1 Base material 12 Metal foil 15 Sheet material

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location B32B 27/04 Z 8413-4F 35/00 7148-4F C08J 5/24 CFD 7310-4F H05K 1 / 03 H 7011-4E // B29K 105: 08 B29L 9:00 31:34

Claims (3)

[Claims] 1. A method for producing a laminated plate, wherein a plurality of base materials (1) impregnated with a resin and a metal foil (7) are continuously integrated to form a laminated body. When the base material (1) is integrated, a sheet material (15) for receiving the resin flowing out from the end of the resin-impregnated base material (1) is arranged below the resin-impregnated base material (1) to be superposed. A method for manufacturing a laminated board, comprising: 2. The method for producing a laminated board according to claim 1, wherein the sheet material (15) is either a polyethylene terephthalate sheet or a polyfluoroethylene sheet. 3. The sheet material (15) is a metal foil (12).
The method according to claim 1, wherein the end portion of the metal foil (12) is bent upward.