JPH08244192A - Laminating method for film and guide member used therefor - Google Patents

Abstract

PURPOSE: To provide a method for laminating a film in which even a thin film having no stiffness is not wound on a heater roller but which can effectively laminate the film, and a guide member used for the method. CONSTITUTION: This method for laminating a film comprises the steps of coating one sides of two films 11, 12 to be laminated with a thermoplastic adhesive, to form adhesive layers, so superposing the films 11, 12 that the layers are brought into contact with one another, and then sandwiching the ends of the two superposed films 11, 12 between the holding parts 23 of guide members 20 in which two synthetic resin films 21, 21 having larger thicknesses than the films 11, 12 and stiffness are laminated with the adhesive. When the ends of the members 20 are sandwiched between a pair of heater rollers 13 and fed, the members 20 are not laminated on the surfaces of the rollers 13, but fed forward together with the members 20 in the state that a laminated film 10 is straight.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for laminating a film in which two films are superposed on each other via a thermoplastic adhesive, sandwiched between a pair of heater rollers and heated to bond the two films together. The present invention relates to a film guide member used in this laminating method.

[0002]

2. Description of the Related Art As a method for laminating a film in which two films are bonded together, the following method is generally performed. That is, as shown in FIG. 5A, a thermoplastic adhesive is applied to one surface of each of the two films 51 and 52 to be laminated to form an adhesive layer (not shown). As shown in (b), two films 51 and 52 are superposed so that the adhesive layers contact each other, and in this state, the two films 51 and 52 are, as shown in FIG. The laminated film 50 is formed by sandwiching it between a pair of heater rollers 53 and sending it out while heating.

[0003]

However, when laminating films by such a method, the films 51, 5
2 is thick to some extent, and there is no particular problem when the two superposed films 51, 52 themselves are stiff, but the thin films 51, 52 are thin and the two superposed films If 51 and 52 are not stiff,
As shown in FIG. 5D, the laminated film 50 heated by the heater roller 53 and sent out is affected by the heat and other factors, and is stuck to the surface of the heater roller 53 even after being sent out. There is a problem that you get caught up in it.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a film laminating method and a guiding member used in the method, which can securely laminate even a thin and flat film without being caught by a heater roller. To provide.

[0005]

In order to solve the above-mentioned problems, the present invention is designed such that two films are superposed on each other with a thermoplastic adhesive interposed therebetween, and the films are sandwiched between a pair of heater rollers and heated. In a film laminating method for laminating two films, a sheet-like guide member having less flexibility than the two superposed films is provided at a tip portion of the superposed two films when sandwiched by the heater roller. Is attached to the heater roller from the guide member.

The guide member used in the above-mentioned laminating method is formed of a sheet-shaped material having a smaller flexibility than the two sheets of the film laminated for laminating, and its rear end is It is suitable to have a sandwiching portion composed of an upper layer and a lower layer separated from the upper layer for sandwiching the leading end portions of the two superposed films, and particularly, the length of either the upper layer or the lower layer. Is preferably shorter than the other.

[0007]

According to the film laminating method configured as described above, since the guide member having small flexibility is attached to the tip of the film to be laminated,
The first guide member that is sent out does not stick to the heater roller, and the subsequent film is also guided to that guide member, so that the film is smoothly sent out without winding around the heater roller.

Further, in the guide member constructed as described above, the guide member is attached to the leading end of the film only by sandwiching the leading end of the film to be laminated in the sandwiching portion separated into the upper layer and the lower layer. In particular, in the case where the length of either the upper layer or the lower layer is shorter than that of the other layer, one of the leading edges is located on the other surface, so that the upper layer is used when the film tip is sandwiched in the sandwiching portion. Is easy to separate from the lower layer.

[0009]

EXAMPLES Examples will be described below with reference to the drawings. FIG. 1 shows a process chart of the film laminating method. First, as shown in FIG.
A thermoplastic adhesive is applied to one surface of each of the two films 11 and 12 to be laminated to form an adhesive layer (not shown). Next, as shown in FIG.
The two films 11, so that the adhesive layers contact each other,
After superposing 12, the guide member 20 is attached to the leading ends of the two superposed films 11 and 12, as shown in FIG.

The guide member 20, as shown in FIG.
Two of the same size that is thicker than the two stacked films 11 and 12 and is elastic (small in flexibility)
The synthetic resin films 21 and 22 are adhered to each other by an adhesive, and the rear end portion of the upper and lower films 21 and 22 is not adhered to each other but is separated from each other. 23 is formed.

Therefore, when the tip portions of the films 11 and 12 are sandwiched between the sandwiching portions 23 of the guide member 20, the synthetic resin film forming the films 11 and 12 and the guide member 20 due to the viscosity peculiar to the synthetic resin film. 21, 2
The two and the two are in close contact with each other to some extent and the attached state is maintained.

Then, the films 11 and 12 having the guide member 20 attached to the leading end in this manner are shown in FIG.
As shown in (d), the guide member 20 is sandwiched by a pair of heater rollers 13 from the tip portion thereof, and is fed while being heated and pressed, and the thermoplastic adhesive formed on the films 11 and 12 is heated and melted. The laminated film 10 in which the films 11 and 12 are adhered to each other is formed. At this time, at the tip of the laminated film 10,
Since the thick and flexible guide member 20 is attached, the guide member 20 itself does not stick to the roller surface of the heater roller 13 and is sent forward as it is in a straight state. Therefore, the formed laminated film 10 (films 11 and 12) also includes the guide member 2 thereof.
It is guided to 0 and is sent out straight in a straight state, and is not stuck to the heater roller 13 and caught therein.

In this embodiment, the production of a single laminated film 10 has been described. However, a continuous process of continuously laminating two continuous films wound in a roll shape from each roll. In this case, the effect peculiar to the laminating method, that is, the working efficiency is improved and the loss of the film is eliminated, which is also advantageous in the economical aspect, is remarkably exhibited.

Further, in the above embodiment, the guide member 20 is formed by the two synthetic resin films 21 and 22 having the same size as described above, but the present invention is not limited to this, and for example, it is shown in FIG. Of the two synthetic resin films 21 and 22, the upper synthetic resin film 2
By making the length of 1 shorter than that of the synthetic resin film 22 serving as the lower layer, the leading edge of the synthetic resin film 21 in the sandwiching portion 23 is located inside the leading edge of the synthetic resin film 22. Since the synthetic resin film 21 overlapping the synthetic resin film 22 can be easily separated from the lower synthetic resin film 22, the workability of attaching the guide member 20 to the tips of the films 11 and 12 is further improved. Even if the upper synthetic resin film 21 and the lower synthetic resin film 22 have the same length, the same effect can be obtained by providing a notch in a part of one of the leading edges.

The synthetic resin film 2 constituting the upper layer
1 does not need to cover the entire surface of the synthetic resin film 22 as the lower layer except the sandwiching portion 23, so that, for example, as shown in FIG. 4, one having a size that partially covers the sandwiching portion 23 and its vicinity is used. It can also be used.

Further, the guide member 20 is formed of a synthetic resin film, but if the predetermined condition (strength of the waist, heat resistance, etc.) can be satisfied and the guide roller 20 can be sandwiched between the heater rollers 13, a metal, It may be formed of another material such as glass fiber.

According to this laminating method, in addition to simply laminating two films, a flexible flat type circuit wiring in which thin paper or film is sandwiched or patterned conductor foil is sandwiched therebetween It can also be applied to the manufacture of plates.

[0018]

As described above, according to the film laminating method of the present invention, when the two superposed films are sandwiched between the heater rollers, the leading end portion of the films is formed into a sheet having a smaller flexibility than the film. Since the guide member is attached and sandwiched between the guide member and the heater roller, even if the film itself is thin and has no rigidity, it is not stuck and stuck on the heater roller, and it is possible to perform not only single processing but continuous processing. It can be done efficiently.

Further, the guide member is formed of a sheet-like material having a smaller flexibility than the two superposed films, and the rear end thereof is provided with a sandwiching portion composed of an upper layer and a lower layer separated from the upper layer. Therefore, the workability is good because the film can be attached simply by sandwiching the leading end of the film between the upper layer and the lower layer of the sandwiching section.
In particular, in the case where one of the upper layer and the lower layer has a shorter length than the other, the upper layer and the lower layer can be easily separated, so that the workability of attaching the guide member to the film front end is further improved.

[Brief description of drawings]

FIG. 1 is a process drawing of a film laminating method showing an embodiment according to the present invention.

FIG. 2 is a perspective view showing a guide member used in the above-described laminating method.

FIG. 3 is a perspective view showing a modified example of a guide member used in the above-described laminating method.

FIG. 4 is a perspective view showing another modification of the guide member used in the above-described laminating method.

FIG. 5 is a process chart showing a conventional example.

FIG. 6 is a schematic diagram showing another conventional example.

[Explanation of symbols]

 10 Laminated film 11, 12 Film 13 Heater roller 20 Guide member 21, 22 Synthetic resin film 23 Clamping part

Claims (3)

[Claims] 1. A method of laminating a film in which two films are superposed on each other via a thermoplastic adhesive, sandwiched between a pair of heater rollers, and the two films are laminated while being heated, and sandwiched between the heater rollers. At this time, a sheet-shaped guide member having a smaller flexibility than the two superposed films is attached to the leading end portions of the superposed two films, and the guide member is sandwiched between the guide members by the heater roller. Laminating method. 2. Stacked two for lamination
It is made of a sheet-shaped material that is less flexible than a sheet of film, and the tip end of the two superposed films is sandwiched at its rear end by an upper layer and a lower layer separated from this upper layer. Member having a portion. 3. The guide member according to claim 2, wherein the length of one of the upper layer and the lower layer is shorter than that of the other.