JP3000881B2 - Film laminating method and guide member used in the method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of laminating two films by laminating two films via a thermoplastic adhesive, sandwiching the two films with a pair of heater rollers, and bonding the two films while heating. The present invention relates to a film guide member used in the laminating method.

[0002]

2. Description of the Related Art As a method of laminating two films to be laminated, the following method is generally employed. 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), the two films 51 and 52 are overlapped so that the adhesive layers come into contact with each other, and in this state, the two films 51 and 52 are joined as shown in FIG. The laminate film 50 is formed by being sandwiched between a pair of heater rollers 53 and sent out while being heated.

[0003]

However, when laminating films by such a method, the films 51, 5
If the thickness of the two films 51 and 52 is thin enough and the two films 51 and 52 overlap each other, there is no particular problem. If there is no waist in 51, 52 itself,
As shown in FIG. 5D, the state in which the laminated film 50 heated and sent out by the heater roller 53 is stuck to the surface of the heater roller 53 even after being sent out due to its heat and other effects. There is a problem that it becomes involved.

Accordingly, an object of the present invention is to provide a method of laminating a film which can be reliably laminated without being caught by a heater roller even if the film is thin and rigid, and a guide member used in the method. To provide.

[0005]

In order to solve the above-mentioned problems, the present invention relates to a method in which two films are laminated with a thermoplastic adhesive therebetween, and the two films are sandwiched between a pair of heater rollers to be heated while heating. In the film laminating method of laminating two films, when sandwiched between the heater rollers, a sheet-like guide member having less flexibility than the two superposed films is provided at the leading end of the two superposed films. Is attached to the heater roller from the guide member.

[0006] The guide member used in the above-described laminating method is formed of a sheet-like material having less flexibility than two films laminated for lamination. It is suitable to have an upper layer and a sandwiching portion consisting of a lower layer separated from the upper layer, which sandwiches the leading end portions of the two stacked films, and in particular, 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,
Since the guide member sent first does not stick to the heater roller, and the subsequent film is also guided by the guide member, the film is smoothly sent without winding around the heater roller.

In the guide member constructed as described above, the guide member is attached to the leading end of the film simply by sandwiching the leading end of the film to be laminated in the holding portion separated into an upper layer and a lower layer. Particularly, when the length of one of the upper layer and the lower layer is shorter than that of the other, since the leading edge of one is located on the other surface, when the leading edge of the film is sandwiched in the sandwiching portion, the upper layer is formed. Is easily separated from the lower layer.

[0009]

Embodiments will be described below with reference to the drawings. FIG. 1 shows a working process diagram by 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.
Two films 11 so that the adhesive layers come into contact with each other,
After the superimposition of the films 12, the guide member 20 is attached to the leading ends of the two superposed films 11, 12, as shown in FIG.

[0010] As shown in FIG.
2 of the same size that is thicker and more stiff (less flexible) than the two superposed films 11 and 12
A pair of synthetic resin films 21 and 22 bonded with an adhesive, and a rear end portion of the holding portion in which the upper film 21 and the lower film 22 are separated from each other without being bonded to each other. 23 are formed.

Accordingly, when the leading ends of the films 11 and 12 are sandwiched between the holding portions 23 of the guide member 20, the synthetic resin film which forms the guide members 20 with the films 11 and 12 due to the viscosity and the like inherent in the synthetic resin film. 21, 2
2 adheres to some extent, and the attached state is maintained.

Then, the films 11, 12 having the guide member 20 attached to the distal end in this manner are separated from each other as shown in FIG.
As shown in (d), when the guide member 20 is sandwiched between a pair of heater rollers 13 and sent out while being heated and pressed, 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 laminate film 10,
Since the thick and stiff 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 straight forward in the straight state. Therefore, the formed laminated film 10 (films 11 and 12) is also
It is guided straight to 0 and is sent straight forward, so that it does not stick to the heater roller 13 and get caught.

In this embodiment, the manufacture of a single laminated film 10 has been described. However, a continuous processing in which two continuous films wound in a roll form are continuously laminated while being unwound from each roll. In such a case, the effect peculiar to this laminating method that the work efficiency is improved and the loss of the film is eliminated, which is economically advantageous, is remarkably exhibited.

In the above-described embodiment, the guide member 20 is formed by the two synthetic resin films 21 and 22 having the same size as described above. However, the present invention is not limited to this. For example, as shown in FIG. As described above, of the two synthetic resin films 21 and 22,
By making the length 1 shorter than the synthetic resin film 22 serving as the lower layer, the leading edge of the synthetic resin film 21 can be inserted inside the leading edge of the synthetic resin film 22 in the holding portion 23. Since the synthetic resin film 21 overlapping the synthetic resin film 22 is easily separated from the lower synthetic resin film 22, the workability of attaching the guide member 20 to the tips of the films 11, 12 is further improved. Even if the upper synthetic resin film 21 and the lower synthetic resin film 22 have the same length, a similar effect can be obtained by providing a cutout at a part of one of the leading edges.

Further, 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 for the holding portion 23. For example, as shown in FIG. Can also be used.

Further, the guide member 20 is formed of a synthetic resin film. If the guide member 20 satisfies predetermined conditions (strength, heat resistance, etc.) and can be sandwiched by the heater roller 13, it may be made of metal, It may be formed of another material such as glass fiber.

According to this laminating method, not only two films are laminated but also a flexible flat circuit wiring having thin paper or a film sandwiched therebetween or a patterned conductor foil sandwiched therebetween. It can also be applied to the manufacture of boards.

[0018]

As described above, according to the method for laminating a film of the present invention, when two superposed films are sandwiched between heater rollers, a sheet-like sheet having less flexibility than the film is attached to the leading end of the film. Since the guide member is attached to the heater roller and sandwiched from the guide member, even if the film itself is thin and rigid, the film is not stuck on the heater roller and is not caught in the roll. It can be done efficiently.

Further, the guide member may be formed of a sheet-like material having a smaller flexibility than the two superposed films, and a holding portion formed of an upper layer and a lower layer separated from the upper layer may be provided at the rear end. Therefore, the film can be easily attached simply by sandwiching the leading end of the film between the upper layer and the lower layer of the holding section, so that workability is good.
In particular, when the length of one of the upper layer and the lower layer is shorter than the other, the upper layer and the lower layer are easily separated from each other, so that the workability of attaching the guide member to the leading end of the film is further improved.

[Brief description of the drawings]

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

FIG. 2 is a perspective view showing a guide member used in the laminating method according to the first embodiment.

FIG. 3 is a perspective view showing a modification of the guide member used in the laminating method of the above.

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

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

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Laminated film 11, 12 Film 13 Heater roller 20 Guide member 21, 22 Synthetic resin film 23 Holding part

Claims (3)

(57) [Claims] 1. A method for laminating two films, which is superimposed on each other via a thermoplastic adhesive, is sandwiched between a pair of heater rollers, and the two films are laminated while being heated. At this time, a sheet-like guide member, which is less flexible than the two superposed films, is attached to the leading ends of the two superposed films, and the guide member is sandwiched between the heater rollers by the guide member. Lamination method. 2. The two superposed for laminating.
A pinch formed of a sheet-like material having less flexibility than a single film, and comprising, at its rear end, an upper layer and a lower layer separated from the upper layer, sandwiching the leading ends of the two superposed films. A guide member having a portion. 3. The guide member according to claim 2, wherein one of the upper layer and the lower layer has a shorter length than the other.