JPH071489A - Manufacture of laminated sheet - Google Patents

Abstract

PURPOSE:To manufactured laminated sheets with high accuracy in thickness without causing any smears by a method wherein a continuous laminate comprising the required number of continuous base materials impregnated with a phenolic resin and having a continuous metallic foil applied to the upper and/or lower surface thereof is formed under heating and pressure by a double belt forming machine and cut to a size required. CONSTITUTION:A continuous laminate 3 comprising, for example, three continuous base materials 1 impregnated with a phenolic resin and having a continuous metallic foil 2 applied to the upper and lower surfaces thereof is continuously formed under heating and pressure by a double belt forming machine 4 and then cut by a cutter 7 to a predetermined size to manufacture laminated sheets 8. Since the continuous laminate is thus continuously formed by using the continuous base materials 1 impregnated with a phenolic resin whose thermal deformation temperature is essentially high, smears are not caused on the continuous laminate. Furthermore, since the continuous laminate is continuous produced one sheet by one sheet, accuracy in thickness can be regulated one sheet by one sheet. Accordingly, the highly heat-resistant laminated sheets 8 can be produced with high dimentional precision and with good efficiency without causing any smears.

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. More specifically, the present invention relates to a new continuous manufacturing method, which is useful for electric / electronic devices, communication devices, computers, etc., and is capable of manufacturing a laminated board for a printed wiring board without smear with high thickness accuracy. is there.

[0002]

2. Description of the Related Art Conventionally, electrical and electronic equipment, communication equipment,
Printed wiring boards having various configurations have been used for computers and the like. For these printed wiring boards,
In response to an increasing demand for high-density packaging in recent years, there has been a strong demand for improvement in heat resistance and dimensional accuracy of a laminate as a base material.

In order to meet the demand for the improvement of such technology, various improvements have been made in the constitution of the resin, the additive and the like of the laminated plate. At present, in general, a laminate made of an epoxy resin-impregnated base material is widely used as a heat-resistant laminate for electric use.

[0004]

However, in spite of various improvements and improvements so far, conventional laminates using epoxy resin are useful as general-purpose heat-resistant electrical laminates, but smear However, in the case of the conventional press production method that is a conventional method for forming laminated plates, there is an unavoidable disadvantage that the thickness accuracy is low.

Therefore, it has been desired to realize a new manufacturing method of a laminated plate which is cheaper and has good heat resistance, does not cause smear, and has excellent thickness accuracy.
The present invention has been made in view of the above circumstances, and solves the drawbacks of conventional epoxy resin laminates, does not cause smear, and produces a heat-resistant laminate with good thickness dimension accuracy. It is intended to provide a way.

[0006]

In order to solve the above problems, the present invention provides a long laminate in which a long metal foil is provided on the upper surface and / or the lower surface of a required number of phenol resin-impregnated long base materials. Provided is a method for producing a laminated plate, which comprises subjecting a body to heat and pressure molding continuously by a double belt molding machine and then cutting the body into a predetermined size.

In the production method of the present invention, the above-mentioned phenol resin-impregnated long base material is used as the base material, and in this case, various known phenol resins are used. For example, any of novolac type phenol resin and resol type phenol resin can be used. More preferably, using a resol type phenolic resin among them,
Further, this phenol resin may be a melamine-modified or epoxy-modified resin.

These phenolic resins can be impregnated into the base material as a varnish containing water, a diluent such as acetone, an inorganic filler, a viscosity modifier, and a flame retardant, if necessary. As a base material therefor, that is, a long base material in the present invention, glass fiber, synthetic fiber woven cloth, non-woven cloth, paper, and other general paper can be used.

As a metal foil for integrally molding in a double belt molding machine, copper, aluminum, iron, nickel, which has been conventionally used for printed wiring boards,
It is a foil of a metal such as zinc or an alloy, and if necessary, an adhesive layer may be provided on one surface thereof for molding. For heating and pressurizing with a double belt molding machine, for example, as illustrated in FIG. 1, a predetermined number of upper surfaces of resin-impregnated long base materials (1) such as a glass sheet impregnated with a predetermined phenolic resin and / Alternatively, a long metal foil (2) is provided on the lower surface to form a long laminate (3), and the long laminate (3) is heated and pressed by a double belt molding machine (4). This molding is generally 1 to 50 kg / cm ²
At a pressure of 140 to 180 ° C.
It can be performed in about 30 minutes.

In this molding, the metal foil (2) may be provided with an adhesive layer (21) in advance. Arrangement, size, etc. of the pressing roller (5) and the roller (6) of the double belt molding machine (4) can be appropriately determined. The heat and pressure molded laminate is cut into a predetermined size by a cutter (7) as illustrated in FIG. 1 to obtain a phenol resin metal clad laminate (8) having a predetermined size.

FIG. 2 is a cross-sectional view illustrating the laminated plate manufactured in this way. For example, depending on the method of FIG. 1, as shown in FIG. 2, it has a structure in which three phenol resin-impregnated base materials (9) and metal foils (10) are arranged integrally on the upper and lower outermost layers. There is. Of course, it is needless to say that various aspects are possible in the detailed configuration.

[0012]

In the present invention, since the continuous molding is carried out using the phenol resin-impregnated long base material, the heat distortion temperature of the phenol resin is essentially high, so that smear does not occur. Since it is produced, the thickness accuracy can be adjusted one by one as compared with the conventional method that employs a multi-stage press molding system of about 20 to 30 stages in a stage.

Therefore, it is possible to produce a laminated plate having good heat resistance with high dimensional accuracy and high efficiency without generating smear.

[0014]

【Example】

Example 1 A laminated plate was manufactured by the double belt molding machine shown in FIG. At that time, each of three long glass cloths having a width of 105 cm and a thickness of 0.15 mm was impregnated with a methyl alcohol solution of 50% by weight of a resole-type phenol resin, and then the upper and lower surfaces of the dried prepreg were coated with a thickness of 0.035 mm. The long-sized laminated body in which the copper foil with the adhesive of 1 was stacked was used.

Molding with a double belt molding machine is 30 kg /
It was carried out by heating and pressurizing at a molding pressure of cm ² and a temperature of 160 ° C. for 10 minutes. Then, it was cut into 100 cm by a cutter to obtain a laminated plate having a thickness of 0.6 mm. For this laminate,
Press-formed product of conventional epoxy resin laminate (Comparative Example 1)
Smear generation and dimensional accuracy due to drilling were evaluated in comparison with. As shown in Table 1, smear does not occur,
Further, the thickness dimension accuracy was also excellent.

Example 2 A laminated board was produced in the same manner as in Example 1 using a novolac type phenol resin. The performance evaluation was also good as shown in Table 1. Comparative Example 1 A glass cloth having a size of 105 × 105 cm and a thickness of 0.15 mm was impregnated with 45% by weight of a methyloxytol solution of an epoxy resin and dried to obtain a prepreg. The same copper foil as in Example 1 was laid on the upper and lower sides of this prepreg, sandwiched between 1 mm thick slantless plates, and 15 sets were inserted into the step, and a press pressure of 30 kg / cm ² , a temperature of 170 ° C was applied by a 30-step press. It was heated and pressed for 120 minutes. As a result, a laminated plate having a thickness of 0.6 mm was obtained.

The performance of this product was also evaluated, and the results shown in Table 1 were obtained. Smear occurred and the accuracy of the thickness dimension was not good.

[0018]

[Table 1]

[0019]

As described in detail above, according to the present invention, it is possible to manufacture a heat-resistant laminated plate with no smear with high thickness accuracy.

[Brief description of drawings]

FIG. 1 is a process sectional view illustrating a manufacturing method of the present invention.

FIG. 2 is a cross-sectional view illustrating a laminated board manufactured according to the present invention.

[Explanation of symbols]

 1 Phenolic Resin Impregnated Long Base Material 2 Long Metal Foil 3 Long Laminate 4 Double Belt Forming Machine 5 Pressing Roller 6 Roller 7 Cutter 8 Laminated Plate 9 Phenolic Resin Impregnated Base Material 10 Metal Foil

[Procedure amendment]

[Submission date] October 28, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

Title of the invention Method for manufacturing laminated plate

[Claims]

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. More specifically, the present invention relates to a new continuous manufacturing method, which is useful for electric / electronic devices, communication devices, computers, etc., and is capable of manufacturing a laminated board for a printed wiring board without smear with high thickness accuracy. is there.

[0002]

2. Description of the Related Art Conventionally, electrical and electronic equipment, communication equipment,
Printed wiring boards having various configurations have been used for computers and the like. For these printed wiring boards,
In response to an increasing demand for high-density packaging in recent years, there has been a strong demand for improvement in heat resistance and dimensional accuracy of a laminate as a base material.

In order to meet the demand for the improvement of such technology, various improvements have been made in the constitution of the resin, the additive and the like of the laminated plate. At present, in general, a laminate made of an epoxy resin-impregnated base material is widely used as a heat-resistant laminate for electric use.

[0004]

However, in spite of various improvements and improvements so far, conventional laminates using epoxy resin are useful as general-purpose heat-resistant electrical laminates, but smear However, in the case of the conventional press production method that is a conventional method for forming laminated plates, there is an unavoidable disadvantage that the thickness accuracy is low.

Therefore, it has been desired to realize a new manufacturing method of a laminated plate which is cheaper and has good heat resistance, does not cause smear, and has excellent thickness accuracy.
The present invention has been made in view of the above circumstances, and solves the drawbacks of conventional epoxy resin laminates, does not cause smear, and produces a heat-resistant laminate with good thickness dimension accuracy. It is intended to provide a way.

[0006]

In order to solve the above problems, the present invention provides a long laminate in which a long metal foil is provided on the upper surface and / or the lower surface of a required number of phenol resin-impregnated long base materials. Provided is a method for producing a laminated plate, which comprises subjecting a body to heat and pressure molding continuously by a double belt molding machine and then cutting the body into a predetermined size.

In the production method of the present invention, the above-mentioned phenol resin-impregnated long base material is used as the base material, and in this case, various known phenol resins are used. For example, any of novolac type phenol resin and resol type phenol resin can be used. More preferably, using a resol type phenolic resin among them,
Further, this phenol resin may be a melamine-modified or epoxy-modified resin.

These phenolic resins can be impregnated into the base material as a varnish containing water, a diluent such as acetone, an inorganic filler, a viscosity modifier, and a flame retardant, if necessary. As a base material therefor, that is, a long base material in the present invention, glass fiber, synthetic fiber woven cloth, non-woven cloth, paper, and other general paper can be used.

As a metal foil for integrally molding in a double belt molding machine, copper, aluminum, iron, nickel, which has been conventionally used for printed wiring boards,
It is a foil of a metal such as zinc or an alloy, and if necessary, an adhesive layer may be provided on one surface thereof for molding. For heating and pressurizing with a double belt molding machine, for example, as illustrated in FIG. 1, a predetermined number of upper surfaces of resin-impregnated long base materials (1) such as a glass sheet impregnated with a predetermined phenolic resin and / Alternatively, a long metal foil (2) is provided on the lower surface to form a long laminate (3), and the long laminate (3) is heated and pressed by a double belt molding machine (4). This molding is generally 1 to 50 kg / cm ²
At a pressure of 140 to 180 ° C.
It can be performed in about 30 minutes.

In this molding, the metal foil (2) may be provided with an adhesive layer (21) in advance. Arrangement, size, etc. of the pressing roller (5) and the roller (6) of the double belt molding machine (4) can be appropriately determined. The heat and pressure molded laminate is cut into a predetermined size by a cutter (7) as illustrated in FIG. 1 to obtain a phenol resin metal clad laminate (8) having a predetermined size.

FIG. 2 is a cross-sectional view illustrating the laminated plate manufactured in this way. For example, depending on the method of FIG. 1, as shown in FIG. 2, it has a structure in which three phenol resin-impregnated base materials (9) and metal foils (10) are arranged integrally on the upper and lower outermost layers. There is. Of course, it is needless to say that various aspects are possible in the detailed configuration.

[0012]

In the present invention, since the continuous molding is carried out using the phenol resin-impregnated long base material, the heat distortion temperature of the phenol resin is essentially high, so that smear does not occur. Since it is produced, the thickness accuracy can be adjusted one by one as compared with the conventional method that employs a multi-stage press molding system of about 20 to 30 stages in a stage.

Therefore, it is possible to produce a laminated plate having good heat resistance with high dimensional accuracy and high efficiency without generating smear.

[0014]

Example 1 A laminated plate was manufactured by the double belt molding machine shown in FIG. At that time, each of three long glass cloths having a width of 105 cm and a thickness of 0.15 mm was impregnated with a methyl alcohol solution of 50% by weight of a resole-type phenol resin, and then the upper and lower surfaces of the dried prepreg were coated with a thickness of 0.035 mm. The long-sized laminated body in which the copper foil with the adhesive of 1 was stacked was used.

Molding with a double belt molding machine is 30 kg /
It was carried out by heating and pressurizing at a molding pressure of cm ² and a temperature of 160 ° C. for 10 minutes. Then, it was cut into 100 cm by a cutter to obtain a laminated plate having a thickness of 0.6 mm. For this laminate,
Press-formed product of conventional epoxy resin laminate (Comparative Example 1)
Smear generation and dimensional accuracy due to drilling were evaluated in comparison with. As shown in Table 1, smear does not occur,
Further, the thickness dimension accuracy was also excellent.

Example 2 A laminated board was produced in the same manner as in Example 1 using a novolac type phenol resin. The performance evaluation was also good as shown in Table 1. Comparative Example 1 A glass cloth having a size of 105 × 105 cm and a thickness of 0.15 mm was impregnated with 45% by weight of a methyloxytol solution of an epoxy resin and dried to obtain a prepreg. The same copper foil as in Example 1 was laid on the upper and lower sides of this prepreg, sandwiched between 1 mm thick slantless plates, and 15 sets were inserted into the step, and the pressure was 35 kg / cm ^{2 at} a temperature of 170 steps and the temperature was 170 ° C. It was heated and pressed for 120 minutes. As a result, a laminated plate having a thickness of 0.6 mm was obtained.

The performance of this product was also evaluated, and the results shown in Table 1 were obtained. Smear occurred and the accuracy of the thickness dimension was not good.

[0018]

[Table 1]

[0019]

As described in detail above, according to the present invention, it is possible to manufacture a heat-resistant laminated plate with no smear with high thickness accuracy.

[Brief description of drawings]

FIG. 1 is a process sectional view illustrating a manufacturing method of the present invention.

FIG. 2 is a cross-sectional view illustrating a laminated board manufactured according to the present invention.

[Explanation of reference symbols] 1 long base material impregnated with phenol resin 2 long metal foil 3 long laminated body 4 double belt molding machine 5 holding roller 6 roller 7 cutter 8 laminated plate 9 phenol resin impregnated base material 10 metal foil

Claims (1)

[Claims] 1. A continuous laminate having a required number of phenolic resin-impregnated elongated base materials provided with an elongated metal foil on the upper surface and / or the lower surface thereof is continuously heated and pressed by a double belt molding machine, and A method for manufacturing a laminated board, which comprises cutting to a required size.