JP2001341204A - Method for producing foil-covered film and laminator - Google Patents

Abstract

(57) [Summary] [Problem] Especially when laminating thin objects,
Prevents curling. A copper foil (H) and a polyimide (F) are supplied between laminate rolls (54) and (55) and drawn out.
In manufacturing the foil-covered film, the polyimide F is supplied through the lower side of the film supply roll 52 to provide an angle R1 with respect to the horizontal plane P including the foil-covered film. The film supply roll 52 can be fixed at different vertical positions by screwing the screws 59 in the respective vertical holes 59a, and can be adjusted from the angle R1 to the angle R2 or the like by the difference between the vertical positions. Similarly, a foil supply roll 53 is provided, and the copper foil H is set at an angle R with respect to the horizontal plane P.
3 is supplied so as to be adjustable to an angle R4 or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a long foil-covered film which can prevent curling even when the object is thin and has a good finish, and a laminator which can execute the method.

[0002]

2. Description of the Related Art In continuous production of a long foil-covered film, a long metal foil and a long synthetic resin film are used.
It is introduced and pulled out between the laminated rolls arranged above and below, but from the viewpoint of placement efficiency, adhesion, and extensibility,
As shown in FIG. 5, the foil-coated film is pulled out horizontally, and a film f having an adhesive adhered to the upper surface is also introduced horizontally to the lower roll 91 side, while the foil h is introduced to the horizontal plane. It is introduced into the upper roll 92 at an angle of about 90 to 160 degrees as viewed from the side.

[0003]

The thickness of the film f is 5
It has become necessary to bond thin materials having a thickness of 0 μm or less and a thickness of the foil h of 12 μm or less.
The tendency to curl in the shape of a kamaboko on the foil h side, which was not seen in the conventional cases of about 0 to 75 μm and about 20 μm, is not enough, resulting in an insufficient finish.

Accordingly, an object of the present invention is to prevent the occurrence of curling while maintaining productivity and efficiency of arrangement, particularly when laminating thin objects.

[0005]

Means for Solving the Problems In the present invention, claim 1 is provided.
The invention described in (1) is in a method for manufacturing a foil-clad film, and in a continuous foil-clad film manufacturing method in which a conveyed long film and a long foil are passed through a laminating roll, before passing through the laminating roll. The film is characterized by imparting an angle to a plane including the foiled film after passing through the film.

According to a second aspect of the present invention, in the first aspect of the invention, the angle of the film is in a range up to 90 degrees on the side opposite to the foil.
According to the invention described in (1), in the invention according to claim 1 or 2, the angle of the foil before passing through the laminating roll with respect to the plane including the foil-clad film after passing from the film side of 45 degrees to the opposite side of 90 degrees. Is provided within the range.

According to a fourth aspect of the present invention, there is provided a laminator, a pair of laminating rolls for laminating a long film and a long foil to be conveyed, and a film supply roll for guiding the film to the laminating roll. And a first adjustment mechanism for fixing the film supply roll at different positions, and by changing the position of the film supply roll, the angle of the film with respect to the plane including the foil-clad film can be adjusted. And

[0008] Further, the invention according to claim 5 is the invention according to claim 4.
In the invention described in the above, a foil supply roll that guides the foil to the laminating roll is installed, and a second adjustment mechanism that enables the foil supply roll to be fixed at different positions is provided. The angle of the foil with respect to the plane including the film is adjustable, and the invention according to claim 6 is the invention according to claims 4 and 5, wherein at least one of the film supply roll and the foil supply roll is provided. Are provided at both ends with projections having substantially the same interval as the width of the supply.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
This will be described with reference to the drawings. FIG. 1 is an explanatory front view of a laminator 1 in which a copper foil H is stretched on a polyimide F as a film. It comprises a unit 6, control units 7, 7, and a machine frame 8 for supporting them.

The polyimide feeding section 2 includes a polyimide roll 21 wound with a long polyimide F having an adhesive and a protective film (not shown) on the outer surface, and a polyimide roll 21 pulled out of the polyimide roll 21, and a peeling roll 23. A roll 22 for guiding to 23, winding rolls 24, 24 folded back from the upper peeling roll 23 for the protective film after peeling, a pendulum roll 25 for passing the polyimide F after peeling for tension adjustment, and And a roll 26 for introduction into the drying unit 3. Drying section 3
Drying the polyimide F stretched substantially horizontally between the roll 26 and the introduction roll 51 of the laminating unit 5.

The copper foil feeding section 4 includes copper foil rolls 41, 41 around which a long copper foil H is wound, and guide rolls 42, 42 to a common copper foil supply roll 53 in the laminating section 5.
・ ・Note that a plurality of peeling rolls 23, 23, copper foil rolls 41, 41 and the like can be provided, but this is for coping with multiple rows of copper foils H in the width direction of the polyimide F (vertical direction in FIG. 1).

The laminating section 5 shown enlarged in FIGS. 2 and 3 includes a film supply roll 52 arranged side by side with an introduction roll 51, a copper foil supply roll 53, and supply rolls 52,5.
The upper laminate roll 54 and the lower laminate roll 55 that pass the polyimide F and the copper foil H from 3 and the bonded polyimide F and the copper foil H are guided substantially horizontally,
Roll 56 for guiding to the pendulum roll 61 of the winding unit 6
It has. As shown in FIG. 4, the film supply roll 52 includes projections 70, 7 having substantially the same interval as the width of the polyimide F.
0 is provided at both ends.

The upper laminating roll 54 and the lower laminating roll 55 have built-in heating elements (not shown).
An arm 50 capable of holding a constant temperature higher than room temperature and supporting the axis of the lower laminating roll 55 and rotatable around a fulcrum 50a to maintain a substantially constant pressure contact with the upper laminating roll 54; A cylinder 57 capable of pushing up the cylinder 50 is provided. Further, a frame 58 is provided with a hole (not shown) for pivoting the introduction roll 51 and avoiding the film supply roll 52 and vertical holes 59a, 59a,. A small frame (not shown) having screw holes for the screws 59, 59,... Is provided inside the frame 58, and the screws 59, 59a,.
59 .. is screwed into the small frame, and the frame 58 is sandwiched between the screws 59, 59 .. and the small frame.
2 is fixed so that the upper and lower positions can be changed in the range of the vertical holes 59a (first adjusting mechanism). Similarly to the film supply roll 52, the copper foil supply roll 53 is also screwed to the machine frame 8 (second adjustment mechanism not shown).

The winding section 6 has a pendulum roll 61, a guide roll 62, and a winding roll 63 for winding the bonded polyimide F and copper foil H and advancing the polyimide F and copper foil H. I have. The control units 7, 7 perform rotation control of the take-up rolls 24, 63,..., Temperature control of the upper laminate roll 54 and the lower laminate roll 55, pressure control of the cylinder 57, reception of various operations, and the like. The rolls are all substantially horizontal and substantially parallel to each other along the direction perpendicular to the plane of FIG.

A method for producing a foil-covered film using the laminator 1 will be described with reference to FIG. The film supply roll 52 receives the polyimide F from the introduction roll 51 on the lower side and supplies it to the upper side of the lower laminate roll 55. When the film supply roll 52 is fixed at the position indicated by the solid line in FIG. 3 by the screw 59 positioned above each vertical hole 59a, the uppermost portion is arranged substantially horizontally with the rolls 51 and 55. The film is supplied between the laminating rolls 54 and 55 in a state where an angle R1 of approximately 45 degrees below the horizontal plane P including the film on which the foil H is stretched as viewed from the supply side is provided.

The film supply roll 52 is provided with each screw 5
9 is loosened, the vertical position inside the vertical hole 59a is moved up and down, and then tightened again, so that the fixing position can be adjusted. When fixed, the angle R2 applied to the polyimide F can be larger than the angle R1.

By giving an angle to the polyimide F, the thickness of the polyimide F is 75 μm or less (preferably 5 μm).
0 μm or less or 25 μm or more), and the thickness of the copper foil H is 2
When the thickness is as thin as 0 μm or less (preferably 12 μm or less or 8 μm or more), the tendency of the copper foil H to curl in a semi-cylindrical shape can be suppressed.
It was confirmed that it depends on the relationship with 1, R2, and the like. Therefore, once the relationship between the wall thickness and the angle is examined, the curl can be effectively suppressed simply by adjusting the fixing position of the film supply roll 52 and easily while maintaining good arrangement and productivity. can do. In addition, even when the thickness of one or both of them exceeds the above, lamination by the laminator 1 can be performed, and at this time, internal distortion can be prevented and the finish can be improved.

Similarly, the foil supply roll 52 converts the copper foil H into
In a state where the angles R3, R4, etc. with respect to the horizontal plane P viewed from the supply side are given smaller than in the conventional case, they are supplied to the lower side of the upper laminate roll 54, and the angles R3, R4, etc. Is variable. Angle R3, R
4 etc. also depends on the degree of curl suppression.

The angle as viewed from the supply side of the polyimide F is set in a range from slightly applied to 90 degrees on the upper side opposite to the copper foil H.
4 and 55, the supply angle of the copper foil H before passing through the horizontal plane P including the polyimide in which the copper foil is stretched after passing the polyimide F side, that is, from the lower side 45 degrees to the opposite side, that is, the upper side 90 degrees. It was also confirmed that the effect of suppressing was remarkably exhibited when the composition was applied. However, when supplied, the copper foil H is made of polyimide F
So that they do not intersect or overlap.

The suppression of curl is estimated as follows. When the supply angle is given to the polyimide F or the copper foil H, the polyimide F or the copper foil H receives heat due to the contact with the laminating rolls 54 and 55. The heat received is proportional to the contact area, which depends on the angle. Further, the polyimide F and the copper foil H have a predetermined coefficient of thermal expansion. Therefore, by adjusting at least one of the angles, the heat at the time of lamination is adjusted and the polyimide F
Can be adjusted, and the degree of thermal expansion is matched with the polyimide F and the copper foil H, even when the copper foil H is stretched and cooled, such as at the time of winding. In addition, it is possible to prevent a semi-cylindrical curl resulting from the relative shrinkage of one side. In order to match the degree of thermal expansion, it is necessary to relatively apply heat to the polyimide F as compared with before, and this is achieved by giving a supply angle to the polyimide F or reducing the angle of the copper foil H. It becomes possible. Further, based on such a concept, each supply angle can be obtained by calculation, but it is preferable to refer to actual data because heat dissipation and the like must be considered. on the other hand,
It is considered that the reason why the film did not curl when the thickness was large was that the film had sufficient strength to alleviate the shrinkage.
Lamination prevents this distortion.

Further, the projections 70 of the film supply roll 52,
70, the polyimide F is 0.2 to 0.
0.08 to 0.05 mm, which is about 3 mm, can be supplied with dramatically reduced widthwise deviation. Even if the rolls 54 and 55 are angled, they can be stable without meandering. Can be supplied. The polyimide F is, for example, 35, 48, 70, 96, 10
When the width of the film supply roll 52 is 5 mm and the width of the film supply roll 52 is changed, the film supply roll 52 is also changed. Similarly,
Protrusions can also be provided on the foil supply roll 53 and other rolls. The width of the copper foil H is determined, for example, so as to be about 30 to 35 mm away from the side of the polyimide F or the adjacent copper foil H.

The present invention is not limited to the above embodiment, but can be variously modified as partially shown below. By film supply roll 52, polyamide,
Polyester, polyacryl, polyvinyl alcohol,
It is also possible to supply an organic synthetic resin film of urethane, polyphenylene sulphite or the like or a combination thereof, or to supply a single, alloy or composite foil of iron, aluminum, nickel, zinc or the like by the foil supply roll 53. it can. Also as a film or foil,
A woven or nonwoven fabric made of inorganic fibers such as glass, natural fibers such as cotton and hemp, and other sheet-like materials can be used. Also, the means for laminating the foil on the film may be only thermocompression bonding, adhesion without applying pressure, or the like, and the foil may be laminated on both sides of the film. The film or foil may be a plurality of long sheets that are continuously conveyed.

Further, it is not necessary for the laminating roll to be capable of generating heat at substantially the same temperature, and a difference in temperature can be provided or heat can be absorbed. Further, each supply roll may be moved and fixed in a direction other than the vertical direction to adjust the supply angle, or the adjustment mechanism may be provided in only one of the supply rolls. A type in which the shaft of the supply roll is inserted into any one, a type in which the shaft automatically moves up and down by a dedicated cylinder, and the like can be used. On the other hand, it is also possible to perform the conventional supply by removing the adjusting mechanism or the supply roll. In addition, the arrangement of each roll,
The configuration and presence / absence of each unit, addition of further functions, and the like can be performed as appropriate.
Note that the division of each unit in the embodiment is for convenience and can be changed as appropriate.

[0024]

According to the present invention, the present invention is directed to a method for producing a foil-covered film, wherein the supply film is provided with an angle with respect to the foil-covered film, so that the film is particularly thin. And foil, it is possible to efficiently and effectively prevent the occurrence of curl, and to prevent distortion even in a thick film or foil.

The invention according to claim 4 or claim 5 is
An adjustment mechanism that can fix each supply roll at different positions is provided, and by changing the position of the supply roll, the angle of the film with respect to the foil-clad film can be adjusted. The invention according to claim 6 is characterized in that, in the invention according to claims 4 and 5, projections having substantially the same interval as the width of the supply material are provided at both ends of the supply roll. Since it is provided, a stable operation can be provided even when the supply angle is given.

[Brief description of the drawings]

FIG. 1 is an explanatory front view of a laminator according to the present invention.

FIG. 2 is an explanatory front view of a laminating section and its periphery.

FIG. 3 is an explanatory diagram of a main part of a laminating unit.

FIG. 4 is an explanatory perspective view of a film supply roll.

FIG. 5 is an explanatory view showing a conventional example.

[Explanation of symbols]

1. Laminator, 2. Polyimide feeding section, 3.
・ Drying section, 4 ・ ・ Copper foil feeding section, 5 ・ ・ Laminating section, 6 ・ ・ Rewinding section, 7 ・ ・ Control section, 8 ・ ・ Machine frame, 2
1. polyimide roll, 22, 26, 56 roll, 23 peel roll, 24, 63 take-up roll, 25, 61 pendulum roll, 41 copper foil roll, 50 arm 50a ... fulcrum, 52 ... film supply roll, 53 ... copper foil supply roll, 54 ... upper laminate roll, 55 ... lower laminate roll, 57 ...
・ Cylinder, 58 ・ ・ Frame, 59 ・ ・ Screw, 59a ・ ・ Vertical hole, 70 ・ ・ Protrusion, F ・ ・ Polyimide, H ・ ・ Copper foil, P
..Horizontal plane, R1, R2... (Polyimide) angle, R
3, R4 · · · (copper foil) angle.

Claims (6)

[Claims] 1. A method for producing a continuous foil-clad film in which a long film and a long foil to be conveyed are passed through a laminating roll. A method for producing a foil-covered film, wherein an angle with respect to a plane including: 2. The angle of the film is set at 9 on the side opposite to the foil.
The method for producing a foil-covered film according to claim 1, wherein the range is up to 0 degrees. 3. The foil before passing through the laminating roll is given an angle with respect to a plane including the foil-clad film after passing from a film side of 45 degrees to an opposite side of 90 degrees.
Or the method of manufacturing a foil-clad film according to claim 2. 4. It has a pair of laminating rolls for laminating a long film and a long foil to be conveyed, and a film supply roll for guiding the film to the laminate roll, and fixing the film supply rolls at different positions. A laminator comprising a first adjusting mechanism that enables the adjustment of a film angle with respect to a plane including a foil-coated film by changing a position of a film supply roll. 5. A foil supply roll for guiding a foil to a laminating roll, and a second adjusting mechanism for fixing the foil supply roll at different positions is provided. 5. The laminator according to claim 4, wherein an angle of the foil with respect to a plane including: is adjustable. 6. The laminator according to claim 4, wherein at least one of both ends of the film supply roll and the foil supply roll is provided with projections having substantially the same interval as the width of the supply material.