JP3988263B2 - Laminate production method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing a laminated plate, which can continuously obtain a laminated sheet covered with metal foil.
[0002]
[Prior art]
Conventionally, metal foil-clad laminates used in the production of printed wiring boards are generally manufactured in a batch system, and are manufactured by impregnating a resin composition into a substrate such as a glass cloth having voids inside or on the surface. Produced by a method in which the required number of prepregs are stacked and a plurality of metal foils are stacked on both sides of the prepreg, and a plurality of the prepregs are stacked with a metal plate or the like sandwiched between them. However, in recent years, a method of continuously performing from impregnation to molding and continuously obtaining a laminated plate has been studied and implemented.
[0003]
As this continuous production method, for example, as shown in FIG. 8, the required number of resin-impregnated base materials 12 obtained by impregnating the resin composition 11 into the base material 10 that is continuously supplied are continuously supplied. The metal foil 13 is laminated so that the metal foil 13 is disposed on both surface layers, the laminate is pressure-bonded with a laminate roll 14, and then the pressure-bonded pressure-bonded article 15 is pulled with a pulling roll 18. Then, after being cured by heating in a heat curing furnace 17, a method of cutting to a predetermined size with a cutter 19 is performed, and by performing each of these steps continuously, a laminated plate Is manufactured continuously. In addition, as the resin composition 11 used for this method, the resin composition 11 containing radical polymerization type thermosetting resin is generally used.
[0004]
However, when manufacturing a laminated board by the method of producing continuously as mentioned above, a wrinkle-like recessed part may be formed in the metal foil of the surface of a laminated board. When a conductive circuit is formed by etching the metal foil on the surface using the laminated board in which the wrinkle-shaped recess is formed, the portion in which the wrinkle-shaped recess is formed is likely to be disconnected, and the yield of the printed wiring board is increased. There was a problem of being low. Therefore, there is a demand for a method for manufacturing a laminated board in which wrinkle-like recesses are not easily formed in the metal foil on the surface of the obtained laminated board.
[0005]
[Problems to be solved by the invention]
The present invention has been made to remedy the above-mentioned problems. The object of the present invention is to impregnate a continuously supplied substrate with a resin composition containing a radical polymerization type thermosetting resin. After laminating the resin-impregnated base material and the continuously supplied metal foil so that the metal foil is arranged on both surface layers, the laminate is pressure-bonded with a laminate roll, and then the pressure-bonded material is heat-cured. It is an object of the present invention to provide a method for producing a laminated board, which is a method for producing a laminated board in which wrinkle-like recesses are hardly formed on a metal foil on the surface of the obtained laminated board.
[0006]
[Means for Solving the Problems]
The manufacturing method of the laminated board which concerns on Claim 1 of this invention is a resin impregnated base material which impregnated the base material supplied continuously with the resin composition containing radical polymerization type thermosetting resin, and supplies continuously. After the metal foil is laminated so that the metal foil is arranged on both surface layers, the laminate is pressure-bonded with a laminating roll, and then the pressure-bonded material is heated to cure the resin composition in the pressure-bonded material. The free roll is arranged so that the portion in contact with the crimped product is rotated obliquely outward with respect to the traveling direction of the crimped product on the metal foil at both ends in the width direction of the crimped product And the metal foil is stretched in the width direction to be manufactured.
[0007]
The manufacturing method of the laminated board which concerns on Claim 2 of this invention is the manufacturing method of the laminated board of Claim 1, The method of making a free roll contact the both width direction edge part of a crimping | compression-bonding thing is a free roll to a crimping | compression-bonding thing. A position detection sensor that detects fluctuations in which the end face position of the crimped object moves in the width direction is provided in the vicinity of the contact position, and both width directions are linked to the fluctuation of the end face position of the crimped article detected by the position detection sensor. It is the method of making it contact while moving the free roll of an edge part to the width direction of a crimped article.
[0008]
The manufacturing method of the laminated board which concerns on Claim 3 of this invention is a manufacturing method of the laminated board of Claim 1, The method of making a free roll contact the both ends of the width direction of a crimping | compression-bonding object is a free roll to a crimping | compression-bonding thing. A position detection sensor that detects fluctuations in which the end face position of the crimped object moves in the width direction is provided in the vicinity of the contact position, and one width is linked to the fluctuation of the end face position of the crimped article detected by the position detection sensor. It is a method of making it contact, adjusting the pressure difference which contact | connects a crimping | compression-bonding thing of the free roll made to contact a direction direction edge part, and the free roll made to contact the other width direction edge part.
[0009]
The method for manufacturing a laminate according to claim 4 of the present invention is the method for manufacturing a laminate according to any one of claims 1 to 3, wherein the position where the free roll is brought into contact with the press-bonded product and the press-bonded product are cured. A second free roll disposed so that a portion in contact with the pressure-bonded product rotates in the same direction as the direction of travel of the pressure-bonded product is brought into contact with the upper surface of the pressure-bonded product at a position between the positions. To do.
[0010]
The manufacturing method of the laminated board which concerns on Claim 5 of this invention is a manufacturing method of the laminated board in any one of Claims 1-4. WHEREIN: The crimping | compression-bonding thing of the position which makes a free roll contact a crimping | compression-bonding article is supported. The method is characterized in that the pressure-bonded article is supported by a support portion of an air floating support system including a plurality of air blowers.
[0011]
The manufacturing method of the laminated board which concerns on Claim 6 of this invention is the manufacturing method of the laminated board in any one of Claims 1-5. WHEREIN: The number of the resin impregnation base materials to laminate | stack is 1 sheet. It is characterized by.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The manufacturing method of the laminated board which concerns on this invention is demonstrated based on drawing. FIG. 1 is a view for explaining a first embodiment of a method for producing a laminated board according to the present invention, wherein (a) is a front view and (b) is a plan view of a main part. Moreover, FIG. 2 is a principal part front view explaining 1st embodiment of the manufacturing method of the laminated board concerning this invention, FIG. 3 is 1st embodiment of the manufacturing method of the laminated board concerning this invention. It is a principal part front view explaining the modified example. Moreover, FIG. 4 is a figure explaining 2nd embodiment of the manufacturing method of the laminated board which concerns on this invention, FIG. 5 demonstrates 3rd embodiment of the manufacturing method of the laminated board which concerns on this invention. It is a figure, (a) is a principal part top view, (b) is a principal part front view. 6A and 6B are diagrams for explaining a fourth embodiment of the method for manufacturing a laminated board according to the present invention, in which FIG. 6A is a front view of the main part and FIG. 6B is a plan view of the main part. FIG. 7 is a main part front view for explaining a fifth embodiment of the method for producing a laminated board according to the present invention.
[0013]
1st embodiment of the manufacturing method of the laminated board which concerns on this invention, as shown to Fig.1 (a), the resin composition 11 impregnated into the base material 10 supplied continuously, the resin impregnation of 2 sheets After laminating the base material 12 and the two metal foils 13 that are continuously supplied so that the metal foil 13 is disposed on both surface layers, the laminated laminate is pressure-bonded with a laminating roll 14, Next, the pressure-bonded material 15 is heated and cured at a temperature at which the resin composition in the pressure-bonded material 15 is cured in the heat curing furnace 17 while the pressure-bonded material 15 is pulled and advanced by the drawing roll 18, and then the cutter is cut. 19 is an embodiment in which the product is continuously cut and cut into a predetermined size.
[0014]
In addition, by heating the crimping | compression-bonding material 15 to the temperature which the resin composition 11 in the crimping | compression-bonding material 15 hardens | cures in the heat-hardening furnace 17, FIG. As shown in b), the portion of the metal foil 13 on the surface of the both ends in the width direction of the press-bonded product 15 that is in contact with the press-fit product 15 rotates obliquely outward with respect to the traveling direction A of the press-fit product 15. It is important to contact the rotatable free rolls 16 and 16 arranged in this manner. The positions where the free rolls 16 and 16 are brought into contact with both ends in the width direction of the press-fit object 15 are brought into contact with each other so that they are substantially located on a virtual line in a direction perpendicular to the traveling direction A of the press-fit object 15. When such free rolls 16 and 16 are not brought into contact with each other, wrinkle-shaped recesses are easily formed in the metal foil 13 on the surface of the obtained laminate.
[0015]
This is because the thermal expansion coefficient of the resin-impregnated base material 12 and the metal foil 13 is different immediately after being pressed by the laminating roll 14 even when the metal foil 13 has no wrinkle-shaped recesses. If the foil 13 is relatively stretched and loosened, and the elongation is partially concentrated, it is considered that the metal foil 13 is bent to form a wrinkled recess. However, according to the present invention, it is possible to apply a pulling force to the entire metal foil 13 by bringing the free roll 16 into contact therewith, so that it is possible to prevent the metal foil 13 from being partially concentrated. , Wrinkle-like recesses are less likely to be formed. When the drive roll is brought into contact instead of the free roll 16, when the advancement speed of the pressure-bonded article 15 and the speed of the drive roll are deviated, the force due to the deviation is applied to the metal foil 13, and the wrinkle-like shape is caused by the force A recess may be formed.
[0016]
Note that since the pressure-bonded article 15 is manufactured while being pulled and drawn by the pulling roll 18, a large tension is applied to the resin-impregnated base material 12 in the pressure-bonded article 15 in the traveling direction A. When the free roll 16 as described above is brought into contact with the metal foil 13 on the surface of the direction end portion, it is possible to apply the pulling force to the resin-impregnated base material 12 in both width directions. The effect of reducing the vertical / horizontal difference of the tension and reducing the vertical / horizontal difference of the dimensional change rate of the obtained laminate and the effect of making it difficult for delamination to occur during heating can be obtained.
[0017]
The timing at which the free roll 16 is brought into contact with the metal foil 13 at both ends in the width direction of the press-bonded product 15 is while the press-bonded product 15 is heated and the curing of the resin composition 11 in the press-bonded product 15 proceeds. Moreover, it is sufficient that the pressure-bonded product 15 is not completely cured, but it is particularly preferable that the resin composition 11 is brought into contact at a timing when the curing of the resin composition 11 has progressed to some extent and the viscosity has increased to some extent, so that wrinkle-shaped recesses are hardly formed. . Also, when the number of the free rolls 16 is increased and the free rolls 16 are brought into contact with both width direction end portions at a plurality of positions, it is preferable because wrinkle-shaped recesses are particularly difficult to be formed. It is necessary to make contact with both ends in the width direction on a plurality of imaginary lines in the direction perpendicular to each other so as to be substantially positioned.
[0018]
In addition, the angle θ at which the free roll 16 rotates obliquely outward with respect to the traveling direction A of the press-bonded product 15 depends on the thermal expansion coefficient of the metal foil 13, the width of the press-bonded product 15, and the width of the free roll 16. -Although it should just adjust so that it may become difficult to form a wrinkle-shaped recessed part according to a material etc., generally it is about 3-60 degrees. For example, as shown in FIG. 2, the angle θ can be changed by fixing a roll support 162 that rotatably supports the free roll 16 to the manufacturing apparatus main body using a bolt 164 and a nut 166. If formed, the angle θ can be easily changed depending on the coefficient of thermal expansion of the metal foil 13 to be used, which is preferable. When the metal foil 13 having a large thermal expansion is used, the angle θ is increased, and when the metal foil 13 having a small thermal expansion is used, the angle θ is decreased.
[0019]
Examples of the material forming the free roll 16 include metals such as stainless steel, rubbers such as urethane rubber, and resins such as MC nylon. When MC nylon is used, the coefficient of friction with the metal foil 13 becomes a value suitable for giving the metal foil 13 a pulling force to the outside, so that it is particularly difficult to form wrinkled recesses. If the friction coefficient is too large, the crimped product 15 may meander, and the meandering may form a wrinkled recess in the metal foil 13 or cause cracks in the metal foil 13. In addition, when the friction coefficient is too small, the free roll 16 slips, and the force for pulling the metal foil 13 to the outside tends to be weak, so that a wrinkle-shaped recess may be formed.
[0020]
Further, examples of the shape of the free roll 16 include a cylindrical roll as shown in FIG. 2 and a roll having an elliptical cross section by taking the corner of the cylindrical roll as shown in FIG. 3. In the case of a roll having an elliptical cross section, the free roll 16 is easy to rotate because the slip is improved, so that it is possible to reliably apply the pulling force to the metal foil 13 and the free roll of the metal foil 13. It is preferable because scratches are less likely to occur in the portion in contact with 16.
[0021]
Further, the position of the metal foil 13 brought into contact with the free roll 16 is not particularly limited as long as it is the surface of the metal foil 13 at both ends in the width direction of the press-bonded material 15, but is cut into a predetermined size by the cutter 19. Sometimes when the width direction end part is also cut off, if it is brought into contact with the part to be cut off and removed, even if the part in contact with the free roll 16 of the metal foil 13 is damaged, the product This is preferable because the yield is increased.
[0022]
As shown in FIG. 4, a position detection sensor 20 is provided in the vicinity of the position where the free rolls 16a and 16b are brought into contact with the press-bonded product 15. In the case of a method in which the free rolls 16a and 16b at both ends in the width direction are moved in the width direction of the press-fit object 15 in conjunction with the change in the end face position of the press-fit object 15 detected by the position detection sensor 20, Since the free roll 16 can be reliably brought into contact with both ends in the width direction of the press-bonded product 15 without being detached from the press-fit product 15 even if the press-bonded product 15 meanders, a wrinkle-shaped recess is particularly difficult to be formed, which is preferable. .
[0023]
As a method of bringing the free rolls 16a and 16b at both ends in the width direction into contact with each other while moving in the width direction of the crimped article 15, for example, a roll connector connected to the free rolls 16a and 16b at both ends in the width direction 202 is connected to the cylinder 204 fixed to the manufacturing apparatus main body, and the cylinder 204 is expanded and contracted in conjunction with the change in the end surface position of the pressure-bonded article 15 detected by the position detection sensor 20, thereby The free rolls 16 a and 16 b are brought into contact with each other while being moved in the width direction of the press-bonded article 15.
[0024]
Further, as shown in FIG. 5 (a), a position detection sensor 20 that detects a fluctuation in which the end face position of the press-bonded article 15 moves in the width direction is provided in the vicinity of the position where the free rolls 16a and 16b are brought into contact with the press-fit article 15. A free roll 16a that is brought into contact with one end in the width direction and a free roll that is brought into contact with the other end in the width direction in conjunction with a change in the end face position of the crimped article 15 detected by the position detection sensor 20 If the pressure of 16b is changed and contact is made while adjusting the pressure difference between the two, the crimped article 15 becomes difficult to meander, and therefore wrinkle-like recesses due to the meander are hardly formed, which is preferable. For example, in the case of meandering to the right with respect to the traveling direction A, the contact pressure of the right free roll 16b is weakened and the contact pressure of the left free roll 16b is increased, and the meandering to the left with respect to the traveling direction A is performed. The meandering can be suppressed by increasing the contact pressure of the right free roll 16b and decreasing the contact pressure of the left free roll 16b.
[0025]
As a method for adjusting the contact pressure between the crimped article 15 and the free roll 16, for example, as shown in FIG. 5B, a roll support 162 that rotatably supports the free roll 16 is used. The contact pressure is adjusted by changing the pressure of the cylinder 168 in advance.
[0026]
Moreover, as shown in FIG. 6, the press-bonded object 15 is in contact with the upper surface of the press-bonded object 15 at a position between the position where the free-roll 16 is brought into contact with the press-bonded object 15 and the position where the press-bonded object 15 is sufficiently cured. When the rotatable second free roll 21 arranged so that the portion rotates in the same direction as the traveling direction A of the crimped article 15 is brought into contact, the free roll 16 is brought into contact with the end portion in the width direction. Since it becomes easy to maintain the force which pulls the metal foil 13 to the outside, wrinkle-shaped recesses are particularly difficult to form, which is preferable.
[0027]
As shown in FIG. 6, the method of advancing the pressure-bonded article 15 includes a method of advancing the pressure-bonded article 15 while supporting the pressure-bonded article 15 by placing the pressure-bonded article 15 on the drive roll 22, and FIG. As shown, a method of advancing the pressure-bonded article 15 while supporting the pressure-bonded article 15 with a support portion of an air floating support system including a plurality of air blowers 23 is included. In addition, when the method of supporting the position where the free roll 16 is brought into contact with the press-bonded object 15 is a method of supporting the press-bonded object 15 with an air floating support type support portion including a plurality of air blowers 23, a free end is provided at the end in the width direction. The force that pulls the metal foil 13 generated by contacting the roll 16 to the outside is less likely to be hindered by the contact portion, so that the metal foil 13 is surely stretched, and it is particularly difficult to form wrinkled recesses. .
[0028]
The substrate 10 used in the present invention is not particularly limited as long as it has voids in the interior and surface and can be impregnated with the resin composition 11, and glass fiber, aramid fiber, polyester fiber, nylon fiber. Cloths and papers using fibers such as In addition, when the base material 10 is a glass fiber cloth (glass cloth) or paper (glass paper), the heat resistance of the obtained laminate is excellent. In addition, as thickness of this base material 10, 0.03-0.4 mm is common.
[0029]
The resin composition 11 used in the present invention is not particularly limited as long as it is a resin composition 11 including a radical polymerization type thermosetting resin. For example, unsaturated polyester resin, vinyl ester resin, etc. These resins may be used alone, modified products, mixtures, and the like. In addition to the radical polymerization type thermosetting resin, the resin composition 11 may contain a radical polymerizable monomer such as styrene or diallyl phthalate, an inorganic or organic filler, an anti-settling agent for the filler, etc. as necessary. You may mix | blend with.
[0030]
Further, the metal foil 13 used in the present invention is not particularly limited as long as it is a long metal foil that can be continuously supplied, and examples thereof include a copper foil and a nickel foil. The thickness of the metal foil 13 is generally 0.012 to 0.07 mm.
[0031]
Moreover, it does not specifically limit as conditions for crimping | bonding the laminated body which laminated | stacked the resin impregnated base material 12 and the metal foil 13 with the lamination roll 14, According to the kind etc. of the used base material 10, the resin composition 11, etc. And adjust accordingly. Further, the conditions such as the temperature and time for heating the pressure-bonded product in the heat curing furnace 17 are appropriately adjusted according to the conditions for curing the resin composition 11 used and the degree of curing to be cured. In addition, after cutting, you may make it heat in order to advance hardening of this laminated board further.
[0032]
In the above embodiment, the embodiment in which the number of the resin-impregnated base materials 12 to be laminated is two has been described. However, the number of the resin-impregnated base materials 12 to be laminated is not particularly limited. What is necessary is just to adjust suitably according to the thickness of the laminated board to perform. In general, when the number of the resin-impregnated base materials 12 to be laminated is two or more, the difference in thermal expansion coefficient between the resin-impregnated base material 12 and the resin-impregnated base material 12 can be absorbed. In the case where the number of the resin-impregnated base materials 12 to be laminated is one, the metal foil 13 on the surface of the obtained laminated plate is not easily formed with wrinkle-shaped recesses. Wrinkled concave portions are easily formed. However, according to the present invention, even when the number of the resin-impregnated base materials 12 to be laminated is one, it becomes difficult to form wrinkle-shaped recesses on the metal foil 13 on the surface of the obtained laminated plate. In addition, when there are a plurality of resin-impregnated base materials 12 to be laminated, the metal foil 13 may be laminated between the resin-impregnated base materials 12.
[0033]
【The invention's effect】
The manufacturing method of the laminated board which concerns on this invention is contacting the crimping | compression-bonding material to the metal foil of the both width direction edge part of the crimping | compression-bonding material, heating a crimping | compression-bonding and advancing hardening of the resin composition in a crimping | compression-bonding material. The metal on the surface of the resulting laminate is produced by making the metal foil extend in the width direction by making contact with a free roll that is arranged so that the portion being rotated rotates obliquely outward with respect to the direction of travel of the crimped product. Wrinkle-like recesses are less likely to be formed on the foil.
[Brief description of the drawings]
1A and 1B are diagrams for explaining a first embodiment of a method for producing a laminated board according to the present invention, in which FIG. 1A is a front view, and FIG.
FIG. 2 is a front view of relevant parts for explaining a first embodiment of a method for producing a laminated board according to the present invention.
FIG. 3 is a front view of relevant parts for explaining a modification of the first embodiment of the method for producing a laminated board according to the present invention.
FIG. 4 is a plan view of an essential part for explaining a second embodiment of the method for producing a laminated board according to the present invention.
FIGS. 5A and 5B are diagrams for explaining a third embodiment of a method for manufacturing a laminated board according to the present invention, wherein FIG. 5A is a plan view of the main part and FIG. 5B is a front view of the main part.
6A and 6B are diagrams for explaining a fourth embodiment of a method for manufacturing a laminated board according to the present invention, in which FIG. 6A is a front view of a main part and FIG. 6B is a plan view of the main part.
FIG. 7 is a front view of relevant parts for explaining a fifth embodiment of a method for producing a laminated board according to the present invention.
FIG. 8 is a front view for explaining a conventional method of manufacturing a laminated board.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Base material 11 Resin composition 12 Resin-impregnated base material 13 Metal foil 14 Laminate roll 15 Press-bonded material 16 Free roll 17 Heat curing furnace 18 Draw roll 19 Cutter 20 Position detection sensor 21 Second free roll 22 Drive roll 23 Air blower A Direction of travel

Claims (6)

A metal foil is disposed on both surface layers of a resin-impregnated base material impregnated in a base material that is continuously supplied with a resin composition containing a radical polymerization type thermosetting resin and a continuously supplied metal foil. After being laminated, the laminate is pressure-bonded with a laminate roll, and then the pressure-bonded product is heated to cure the resin composition in the pressure-bonded product, The metal foil is manufactured by bringing the metal foil into the width direction by contacting the metal foil with a free roll disposed so that the portion in contact with the pressure-bonded material rotates obliquely outward with respect to the traveling direction of the pressure-bonded material. The manufacturing method of the laminated board characterized by these. A position detection sensor that detects the fluctuation of the end face position of the crimped product in the width direction is provided near the position where the free roll is brought into contact with the crimped product. The method is characterized in that the free rolls at both ends in the width direction are brought into contact with each other while being moved in the width direction of the press-bonded product in conjunction with the change in the end face position of the press-fit product detected by the position detection sensor. A method for producing a laminate according to 1. A position detection sensor that detects the fluctuation of the end face position of the crimped product in the width direction is provided near the position where the free roll is brought into contact with the crimped product. , In conjunction with a change in the end face position of the press-bonded object detected by the position detection sensor, a press-bonded object including a free roll brought into contact with one width direction end part and a free roll brought into contact with the other width direction end part; The method for producing a laminated board according to claim 1, wherein the contact is made while adjusting a pressure difference to be in contact. On the upper surface of the crimped product between the position where the free roll is brought into contact with the crimped product and the position where the crimped product is cured, the portion in contact with the crimped product is rotated in the same direction as the traveling direction of the crimped product. The manufacturing method of the laminated board in any one of Claims 1-3 which makes the 2nd free roll arrange | positioned in contact. The method of supporting the pressure-bonded product at a position where the free roll is brought into contact with the pressure-bonded product is a method of supporting the pressure-bonded material by a support unit of an air floating support system including a plurality of air blowers. The manufacturing method of the laminated board in any one of Claim 4. 6. The method for manufacturing a laminated board according to claim 1, wherein the number of the resin-impregnated base materials to be laminated is one.

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