JPH11309811A - Manufacture of laminated sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent resin compositions from flowing out of an end of width direction of a pressed object during manufacturing by pressing and bonding a laminate, which is laminated so that metallic foils are arranged on both surfaces, using laminate rolls, and thereafter removing the resin composition at the end of width direction of the pressed object and the pressed object is heated and cured. SOLUTION: Two resin-impregnated bases 3 are formed by impregnating bases 1, which are continuously fed, with resin compositions 2 containing thermoset resin of radical polymerization. The resin-impregnated bases 3 and two metallic foils 4 are laminated so that the metallic foils 4 are arranged on both surfaces thereof. Next, a laminate is pressed and bonded by laminating rolls 5, and thereafter the resin composition of an end of width direction of the pressed object is removed by a resin removing device 6, and the pressed object is heated and cured in a heating and curing furnace 7. And then, the pressed object is cut by cutters 8 for continuously manufacturing laminated sheets. The number of the resin-impregnated bases 3 to be laminated is not limited, the number thereof can be appropriately controlled corresponding to thickness of laminated sheets to be obtained.

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 laminate, which can continuously obtain a laminate with a metal foil.

[0002]

2. Description of the Related Art Conventionally, metal foil-clad laminates used in the manufacture of printed wiring boards are generally manufactured by a batch method, and a resin composition is applied to a substrate such as glass cloth having voids inside or on the surface. By laminating the required number of prepregs manufactured by impregnating with, and laminating metal foil on both sides of the prepreg, sandwiching a metal plate etc., and then heating and pressing the piled pieces together Although it is manufactured by a molding method, in recent years, a method of continuously performing from impregnation to molding to continuously obtain a laminate has been studied and implemented.

[0003] As a method for this continuous production, for example, as shown in FIG.
Of the required number of resin-impregnated substrates 3 in which the resin composition 2 is impregnated
And the continuously supplied metal foil 4 are laminated so that the metal foil 4 is disposed on both surface layers thereof, and the laminated product is pressed by a laminating roll 5, and then the pressed product is heated and cured in a heating and curing oven. After heating and curing at 7, the cutter 8 cuts it to a predetermined size, and the laminate is continuously manufactured by continuously performing each of these steps. In addition, as the resin composition 2 used in this method, a resin composition 2 containing a radical polymerization type thermosetting resin is generally used.

The resin-impregnated base material 3 generally has air bubbles left in the voids inside the base material 1. For this reason, when a laminate is manufactured, the resin composition 2 is caused to flow from the center to the widthwise end by pressing with a laminating roll 5 to remove bubbles in the substrate 1. Therefore, the amount of the resin composition 2 impregnated into the substrate 1 is
The amount is slightly larger than the amount for filling the voids in the substrate 1 and is generally impregnated in such an amount that a layer of the resin composition is formed on both surfaces of the substrate 1.

However, when a laminate is manufactured by the above-described method of continuously producing a laminate, the resin composition 2 immediately after being pressed by the laminating roll 5 has a relatively low viscosity.
As shown in (b), when the resin composition 2 is conveyed in the heating and curing furnace 7 and the like, the resin composition 2 flows out from the width direction end of the press-bonded material, and contaminates the transfer rolls 71 and the like in the heating and curing furnace 7. There has been a problem that cleaning may be required and productivity may be reduced.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a resin composition containing a radical polymerization type thermosetting resin. After the resin-impregnated base material impregnated in the base material supplied to the base material and the continuously supplied metal foil are laminated so that the metal foil is arranged on both surface layers thereof, the laminate is pressed with a laminating roll. Then, it is a method for manufacturing a laminate in which the press-bonded material is heated and cured to continuously manufacture the laminate, in which the resin composition hardly flows out from the widthwise end of the press-bonded material during manufacture,
It is an object of the present invention to provide a method of manufacturing a laminated board that does not easily pollute manufacturing equipment.

[0007]

According to a first aspect of the present invention, there is provided a method of manufacturing a laminated board, comprising a step of impregnating a resin composition containing a radical polymerization type thermosetting resin into a continuously supplied base material. After laminating the impregnated base material and the continuously supplied metal foil so that the metal foils are arranged on both surface layers, the laminated product is pressed with a laminating roll, and then the width direction end of the pressed product is laminated. It is characterized by removing the resin composition of the part and heat-curing the pressure-bonded product to produce.

According to a second aspect of the present invention, in the method for manufacturing a laminated board according to the first aspect, the method for removing the resin composition at the width direction end of the pressed article is the same as that of the first embodiment. The lower metal foil of the metal foils disposed on both surface layers is disposed so as to protrude in the width direction, and the resin composition adhered to the protruding portion of the metal foil is brought into contact with a rotating roll to obtain the resin composition. Is transferred to a roll, and then the resin composition transferred to the roll is scraped off.

According to a third aspect of the present invention, in the method for manufacturing a laminated board according to the first aspect, the method for removing the resin composition at the width direction end of the pressed article is the same as that of the first embodiment. After the rotating disk is inserted between the metal foils disposed on both surface layers and brought into contact with the resin composition at the end in the width direction to transfer the resin composition to the disk, the resin composition transferred to the disk is scraped. It is a method of removing and removing.

[0010] According to a fourth aspect of the present invention, in the method for manufacturing a laminate according to the first aspect, the method for removing the resin composition at the width direction end portion of the press-bonded object is the same as that of the first embodiment. The method is characterized in that a pipe is inserted between metal foils disposed on both surface layers and the resin composition at the end in the width direction is removed by suction.

According to the present invention, after the laminate is pressed with a laminating roll, when the resin composition has a relatively low viscosity and the resin composition is easy to flow, the resin composition at the widthwise end of the pressed product is Since the resin composition is manufactured while removing the material, the resin composition is further removed even if it flows from the center portion side, so that the resin composition hardly flows out from the widthwise end of the press-bonded product, and the manufacturing equipment is hardly stained.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for manufacturing a laminate according to the present invention will be described with reference to the drawings. FIG. 1 is a process diagram illustrating a first embodiment of a method for manufacturing a laminate according to the present invention,
FIG. 2 is a view for explaining the main part of the steps in the first embodiment of the method for manufacturing a laminated board according to the present invention. FIG. 3 is a view for explaining the main part of the steps of the second embodiment of the method for manufacturing a laminated board according to the present invention, and FIG. FIG. 5 is a diagram illustrating a main part of a process according to the embodiment, and FIG. 5 is a diagram illustrating a main part of a process according to a fourth embodiment of the method of manufacturing a laminated board according to the present invention.

As shown in FIG. 1, a first embodiment of a method for manufacturing a laminate according to the present invention is a method for continuously supplying a resin composition 2 containing a radical polymerization type thermosetting resin. After laminating two resin-impregnated base materials 3 impregnated in the material 1 and two metal foils 4 continuously supplied so that the metal foils 4 are arranged on both surface layers thereof, the laminate is obtained. Is pressed with a laminating roll 5, and then the resin composition 2 at the end in the width direction of the pressed product is removed by a resin removing device 6. It is cut to size and continuously manufactured. The number of the resin-impregnated substrates 3 to be laminated is not particularly limited, and may be appropriately adjusted according to the thickness of the laminated plate to be obtained. The metal foil 4 is also provided between the resin-impregnated base materials 3 to be laminated.
May be laminated.

In addition, before the laminate is pressed by the laminating roll 5 and before entering the heating / curing furnace 7 or at the time when the heating is started in the heating / curing furnace 7, the resin at the end in the width direction of the pressed product is It is important to remove composition 2. If not removed, the resin composition 2 will flow out from the widthwise end of the crimped product during the production of the laminate, and the production equipment will be easily soiled.

As a method of removing the resin composition 2 at the end in the width direction of the crimped product by the resin removing device 6, for example, FIG.
(A) As shown in FIG.
a, 4b, the lower metal foil 4b is replaced with the upper metal foil 4a.
The protruding portion of the metal foil is brought into contact with the resin composition 2 adhered to the protruding portion of the metal foil 4b by the rotating conical roll 61. The resin composition 2 adhered to 4b
After the transfer to 1, the resin composition 2 transferred to the roll 61 is scraped off by a scraping blade 62 and removed. A support 63 is provided on the lower surface side of the protruding portion of the lower metal foil 4b so as to rotate in synchronization with the speed at which the metal foil 4b moves. The resin composition 2 attached to the metal foil 4b in the
1 is in stable contact.

Since the viscosity of the resin composition 2 is relatively low and the resin composition 2 is easy to flow immediately after pressing with the laminating roll 5, as shown in FIG. The resin composition 2 is likely to accumulate in the protruding portion of 4b. Then, when the resin composition 2 further flows from the central portion side, the resin composition 2 cannot be received at the protruding portion of the lower metal foil 4b and flows out from the width direction end portion. However, as described above, by removing the resin composition 2 at the end in the width direction of the press-bonded material, as shown in FIG. 2C, the resin composition accumulated in the protruding portion of the lower metal foil 4b Since the amount of the object 2 is reduced, even if the resin composition 2 further flows from the central portion side, the resin composition 2 can be received by the protruding portion of the lower metal foil 4b, so that it does not easily flow out from the width direction end portion.

The resin composition 2 at the end in the width direction of the crimped product
Is removed by the resin removing device 6 before the pressure is applied by the laminating roll 5 and before entering the heating and curing furnace 7.
Alternatively, it may be either when heating in the heat curing furnace 7 is started, or generally, if the resin composition 2 at the width direction end is removed before pressing into the heat curing furnace 7 after pressure bonding with the laminating roll 5. In the heat curing furnace 7, the flow is settled to the extent of the removed portion, and it is difficult for the resin composition 2 to flow out from the end in the width direction of the pressure-bonded material. It may be removed before.

The roll 61 for removing the resin composition 2 at the end in the width direction of the press-bonded material is not limited to the conical roll 61. For example, as shown in FIG.
4 is brought into contact with the resin composition 2 adhering to the protruding portion of the lower metal foil 4b, whereby the resin composition 2 adhering to the protruding portion of the metal foil 4b is transferred to the cylindrical roll 64. After the transfer, the resin composition 2 transferred to the cylindrical roll 64 is scraped off with a scraper blade (not shown) to remove the resin composition 2 at the widthwise end of the crimped product.
May be removed. In the case of the conical roll 61 shown in FIG. 2A, since the scraping blade 62 can be arranged at a position horizontally separated from the press-bonded material, the resin composition 2 transferred to the roll 61 is transferred to the scraping blade 62. When it becomes difficult to scrape off, it is preferable because the scraping blade 62 can be easily adjusted.

Metal foils 4a and 4b disposed on both surface layers of the crimped product
The length of the lower metal foil 4b protruding more in the width direction than the upper metal foil 4a is determined by transferring the resin composition 2 attached to the metal foil 4b with a roll 61 or the like. What is necessary is just to adjust suitably to the length which the thing 2 does not flow out of the width direction end part of a crimping | compression-bonded thing, but 3-20 mm, More preferably, it is about 5-10 mm. If it is less than 3 mm, the resin composition 2 tends to flow out from the end in the width direction of the press-bonded product, and if it exceeds 20 mm, the amount of the metal foil 4b used is large, and it is not economical.

The resin composition 2 at the end in the width direction of the crimped product
As a method of removing the metal foil 4a, the lower metal foil 4b of the metal foils 4a and 4b arranged on both surface layers of the crimped product is arranged so as to protrude more in the width direction than the upper metal foil 4a. Without limitation, as shown in FIG. 4, metal foils 4a and 4b arranged on both surface layers of the crimped object are arranged at substantially the same position, and metal foil 4 arranged on both surface layers of the crimped object. , 4, the rotating disk 66 is inserted and brought into contact with the resin composition 2 at the end in the width direction to transfer the resin composition 2 to the disk 66, and then the resin composition 2 transferred to the disk 66 is removed. Scraping blade 67
As shown in FIG. 5A, metal foils 4a and 4b disposed on both surface layers of the press-bonded material may be used.
Are disposed at substantially the same position, and a pipe 68 is inserted between the metal foils 4 and 4 disposed on both surface layers of the press-bonded material to remove the resin composition 2 at the end in the width direction by suction. You may do it.

Also in the case of these methods, the pressure-bonded material immediately after pressing with the laminating roll 5 has a relatively low viscosity of the resin composition 2 and the resin composition 2 easily flows.
As shown in the figure, it is easy to accumulate between the upper and lower metal foils 4 and 4 at the width direction end, and when the resin composition 2 flows from the center side, it flows out from the width direction end. When the resin composition 2 at the end in the width direction of the pressed product is removed,
As shown in FIG. 5 (c), the amount of the resin composition 2 accumulated between the metal foils 4 and 4 at the width direction ends is reduced. End metal foil 4,
4, the resin composition 2 is less likely to flow out from the width direction end.

In the case of the method using the rotating disk 66 in FIG. 4 or the method of inhaling with the pipe 68 in FIG. 5A, the lower metal foil 4 is wider than the upper metal foil 4. Since it is not necessary to arrange the metal foil 4 so as to protrude in the direction, the amount of the metal foil 4 used can be reduced, which is preferable. The lower metal foil 4b of the metal foils 4a and 4b arranged on both surface layers of the crimped product
Are arranged so as to protrude in the width direction from the upper metal foil 4a, and the metal foils 4a and 4b arranged on both surface layers of the crimped material are used as in the case of manufacturing a thin laminated board. It is preferable that the resin composition 2 can be removed even when the distance between the two is small.

The substrate 1 used in the present invention is not particularly limited as long as it has a void inside or on the surface and is capable of impregnating the resin composition 2, and may be glass fiber, aramid fiber, polyester fiber or the like. Cloth and paper using fibers such as nylon fibers. In addition, the substrate 1
Is a cloth (glass cloth) or paper (glass paper) made of glass fiber, the resulting laminate has excellent heat resistance and is preferred. In addition, the thickness of the substrate 1 is set to 0.
1 to 0.4 mm is common.

The resin composition 2 used in the present invention is not particularly limited as long as it is a resin composition 2 containing a radical polymerization type thermosetting resin.
Resins such as an unsaturated polyester resin and a vinyl ester resin alone, modified products, and mixtures can be used. In addition, in the resin composition 2, a radical polymerizable monomer such as styrene and diallyl phthalate, an inorganic filler, an organic filler, and an anti-settling agent for the filler are appropriately added together with the radical polymerization type thermosetting resin, if necessary. May be blended.

The metal foil 4 used in the present invention is not particularly limited, and examples thereof include a copper foil and a nickel foil. The thickness of the metal foil 4 is 0.0
12 to 0.07 mm is common.

The conditions for pressing the laminate obtained by laminating the resin-impregnated base material 3 and the metal foil 4 with the laminating roll 5 are not particularly limited, and the type of the base material 1 used and the viscosity of the resin composition 2 are not limited. It is adjusted appropriately according to the above.

The conditions such as the temperature and time for heating the press-bonded material in the heat-curing furnace 7 are appropriately adjusted according to the conditions under which the resin composition 2 used is cured and the degree of curing to be cured. After cutting, the laminate may be heated to further cure the laminate.

[0028]

The method of manufacturing a laminated board according to the present invention comprises removing the resin composition at the end in the width direction of the press-bonded article and heating and curing the press-bonded article. It becomes difficult for the resin composition to flow out from the widthwise end of the press-bonded product, and it becomes difficult for the production equipment to become dirty.

[Brief description of the drawings]

FIG. 1 is a process diagram illustrating a first embodiment of a method for manufacturing a laminated board according to the present invention.

FIG. 2 is a diagram illustrating a main part of a process in the first embodiment of the method for manufacturing a laminated board according to the present invention.

FIG. 3 is a diagram illustrating a main part of a process in a second embodiment of the method for manufacturing a laminated board according to the present invention.

FIG. 4 is a diagram illustrating a main part of a process in a third embodiment of the method of manufacturing a laminated board according to the present invention.

FIG. 5 is a diagram illustrating a main part of a process in a fourth embodiment of the method of manufacturing a laminated board according to the present invention.

FIG. 6 is a process diagram illustrating a conventional method for manufacturing a laminated board.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 base material 2 resin composition 3 resin impregnated base material 4 metal foil 5 laminating roll 6 resin removing device 7 heat curing furnace 8 cutter 61 conical roll 62 scraping blade 63 support 64 cylindrical roll 66 disk 67 scraping Blade 68 pipe

Claims (4)

[Claims] 1. A resin-impregnated base material in which a base material continuously supplied with a resin composition containing a radical polymerization type thermosetting resin is impregnated with a metal foil continuously supplied, and both surface layers After laminating so that the metal foil is arranged, the laminate is pressed with a laminating roll, and then the resin composition at the width direction end of the pressed product is removed, and the pressed product is heated and cured to manufacture. A method for producing a laminate, characterized in that: 2. A method for removing a resin composition at an end portion in a width direction of a press-bonded material, wherein a lower metal foil of metal foils disposed on both surface layers of the press-bonded material is arranged so as to protrude in a width direction; A method in which a rotating roll is brought into contact with the resin composition adhered to the metal foil at the protruding portion to transfer the resin composition to the roll, and then the resin composition transferred to the roll is scraped and removed. The method for producing a laminate according to claim 1, wherein: 3. A method for removing a resin composition at an end portion in a width direction of a press-bonded product includes inserting a rotating disk between metal foils disposed on both surface layers of the press-bonded product, and removing a resin composition at a width-direction end portion. The method for producing a laminate according to claim 1, wherein the resin composition is transferred to a disk by bringing the resin composition into contact with an object, and then the resin composition transferred to the disk is scraped off. 4. A method of removing a resin composition at a widthwise end of a crimped product comprises inserting a pipe between metal foils disposed on both surface layers of the crimped product and sucking the resin composition at the widthwise end. The method for producing a laminate according to claim 1, wherein the method is a method of removing the laminate by performing the method.