JPH09267396A - Deforming roller device and method for deforming by using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a defoaming roller device wherein it is a simple constitution and there exists no problem on increase in expenditure and continuous lamination is possible and working efficiency is good and a method for defoaming by using it. SOLUTION: This device is used in a process wherein a plurality of sheet-like films are continuously sticked together with an adhesive and it is carried, and a pair of roller members 20 and 21 arranged so as to pinch the sticked and carried sheet-like films are provided and one 20 of the rollers is a cylindrical shape and another one 21 forms spiral-shaped projections 22 on its outer periphery and when the films are sticked together with an adhesive, enveloped air bubbles are moved in the width direction along the projected roller part 22 of a roller member 21 and they can be guided to the side edge part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a defoaming roller device which eliminates air bubbles contained when sheet-like films are bonded together with an adhesive, and a defoaming method using the same. In addition, in the present specification, particularly when expressed as a sheet-like film, the term includes a sheet (having a thickness of 0.25 mm or more) and a film (having a thickness of less than 0.25 mm).

[0002]

2. Description of the Related Art In the field of attaching sheets or films to each other, when the sheets or films are attached with an adhesive agent, especially when the adhesive layer is made relatively thick, bubbles are likely to be included between them. The inclusion of air bubbles in the sheet not only causes a problem in terms of quality, but also causes printing to be blurred or distorted when, for example, printing is performed on the bonding surface of the film. Therefore, conventionally, for example, the device has been individually devised by, for example, performing vacuum defoaming treatment on the adhesive in advance or improving the method of applying or supplying the adhesive between the films. Further, as a more complete defoaming measure, it is also possible to prevent air bubbles from being included by adhering sheets or films together with an adhesive in a vacuum chamber. Specifically, the bonding equipment or the bonding process is provided in a state capable of vacuuming, and after arranging it on a roller member or the like used for bonding sheets or films, the vacuum chamber is evacuated to a degree of vacuum. After raising, the sheets and films are attached to each other with an adhesive, and if necessary, after rolling treatment, the vacuum chamber is returned to atmospheric pressure, and the attached sheets and films are taken out of the vacuum chamber.

[0003]

In the above-mentioned conventional method, a vacuum equipment such as a vacuum chamber must be provided, but the investment cost associated with this vacuum equipment increases. In particular, in the case of continuously laminating or rolling to a predetermined thickness, there is a problem that the equipment becomes large and the maintenance cost also increases. In the step of bonding in the vacuum chamber, the vacuum chamber is evacuated as described above, the sheets and films are bonded together with an adhesive, and after that, the vacuum chamber is returned to atmospheric pressure. Then, the batch processing is carried out in which the bonded sheets and films are taken out of the vacuum chamber. For this reason, there is a problem in that working efficiency is deteriorated in the case where the adhesive is continuously stuck together or when the rolling treatment is carried out together with the sticking.

The present invention has been achieved as a result of repeated studies in view of the above background. An object of the present invention is a simple structure, cost increase does not pose a problem, and continuous application is possible. It is an object of the present invention to provide a defoaming roller device that can be matched and has good working efficiency, and a defoaming method using the same. Other purposes will be clarified with the following content explanation.

[0005]

In order to achieve the above-mentioned object, the defoaming roller device of the present invention is used in a process of continuously laminating a plurality of sheet-like films with an adhesive and sending the film. It is provided with a pair of roller members arranged so as to sandwich the sheet-like films that are pasted together and sent, one of the roller members is cylindrical, and the other of the roller members is spiral on the outer periphery. Forming a projection rolling portion of a shape, the bubbles included when bonded with the adhesive, in the width direction along the projection rolling portion of the other roller member, between the sheet-like films The main part is that it can be guided to the side edge.

Further, in order to achieve the above-mentioned object, the defoaming method of the present invention comprises a sheet-like film sent by laminating a plurality of sheet-like films with an adhesive and a cylindrical roller member and a spiral. By rolling while sandwiching it with a roller member having a protrusion-rolled portion of a shape, the air bubbles included when the sheet-shaped films are stuck together with an adhesive, the width direction along the protrusion-rolled portion of the roller member. The main part is to move to and push out from the side end portions of the sheet-like films.

According to the above construction, in the process in which the sheet-like films are bonded together with an adhesive and sent, a cylindrical (including tubular) roller member and a spiral roller member with a protrusion rolling portion are formed. Roll while sandwiching. In the rolling by the protrusion rolling unit, the bubbles included in the process of applying or supplying the adhesive are moved in the width direction along the spiral protrusion rolling unit using the adhesive as a transfer medium, and the bubbles are moved from the side end portions. Pushed out. Such a defoaming mechanism of the present invention has been completed based on the following findings. First, the bubbles that have entered between the sheet-like films are gradually or continuously expanded from the initial size in the process of being sequentially or continuously pressurized. Further, the encapsulated bubbles almost stagnate when reaching a predetermined size. Therefore, it was found that, by applying the roller device of the present invention before this stagnation, the bubbles are efficiently guided or moved along the spiral-shaped protrusion rolling portion using the adhesive as a transfer medium.

When the present invention is applied, it is preferable to roll while sandwiching between the roller member and the roller member with the spiral-shaped projection rolling portion before the bubbles stagnant. More specifically, in an aspect in which the adhesive layer is provided relatively thick, particularly in an aspect in which the adhesive layer is provided in a thickness of 1.5 times or more the total thickness of the sheet-like films,
When the present invention is applied to the process part before the size of the bubbles has an average outer diameter of 2 to 5 mm or more than at least about 6 mm, the bubbles are moved in the film width direction along the spiral-shaped protrusion rolling part. easy. This numerical specification is
The size of the adhesive used depends on the size of the bubbles.
In particular, it is a general guide because it varies somewhat depending on the viscosity and the amount of application or supply thereof. However, when laminating a normal sheet-like film, the average outer diameter is 6 m.
It has also been confirmed that when the size is larger than m, it becomes difficult for bubbles to move using the adhesive as a transfer medium.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of an essential part schematically showing a defoaming roller device for a laminated film of the present invention, and FIG. 2 is a schematic view showing an entire laminating process using the defoaming roller device. In this embodiment, a sheet-like film 1 (a resin film having a thickness t1 of 0.125 ± 0.01 mm, hereinafter referred to as film 1),
Sheet film 2 (thickness t2 is 0.125 ± 0.01
mm resin film, which will be referred to as “film 2” hereinafter) with an adhesive agent P (epoxy resin adhesive agent) interposed therebetween and an initial thickness at the time of attachment (each film 1.2 and the adhesive agent P). And the total thickness) is set to 1 mm,
This is an example when the rolling process is gradually performed until the predetermined thickness becomes 0.8 ± 0.02 mm. Needless to say, the object to be bonded in the present invention is not limited to this example, and includes, for example, both modes of bonding sheets, films, and modes of bonding sheets and films.

In FIG. 2, in the laminating step, the films 1 and 2 are wound around the winding shafts 3A and 3B and arranged vertically, and are drawn out from the winding shafts 3A and 3B at a predetermined speed. The film 1 fed from above and the film 2 fed from below are sandwiched by the laminating roller members 4 and 5 which are rotated in synchronization with the winding shafts 3A and 3B. At this time, the adhesive P is quantitatively supplied between the films 1 and 2 through the nozzle 6, and the adhesion of the two is started. The adhesive P is degassed in advance in vacuum and is supplied from the nozzle 6 in a predetermined amount so as not to entrap air. However, since the adhesive P has a high viscosity (about 36000 cp), it is impossible to completely prevent air entrapment, and fine air bubbles are present between the films 1 and 2 laminated by the roller members 4 and 5. Is involved.

The films 1 and 2 (hereinafter referred to as the laminating sheet 7) which have started to be adhered are then combined with the first conveying and laminating roller members 8 and 9 and the second conveying and laminating roller members. While being subjected to a predetermined pressure by the roller members 10 and 11, the transfer roller members 13 and 1 are transferred toward the inside of the thermosetting furnace 12 and provided on the outlet side of the thermosetting furnace 12.
It is transferred to the next process via 4. Here, the heat curing furnace 12
The door is closed so that the bonded sheet 7 can be transferred by an opening / closing shutter (not shown), and the internal temperature is controlled to 50 degrees, which is set as an optimum condition corresponding to the adhesive P of the epoxy resin. In addition, inside, there are roller devices 15 and 1 for rolling at a plurality of locations along the inlet to the outlet.
6, 17, 18, 19 are provided, and the laminating sheet 7 is provided with these roller devices 15, 16, 17, 18,
It is designed to be gradually rolled by 19 to a thickness of 0.8 ± 0.02 mm. And, among these roller devices, the fourth one is the defoaming roller device 18 to which the present invention is applied, and the others are conventional (winding shaft 3A,
3B, the laminated sheet 7 is sandwiched between a pair of cylindrical rollers which are rotated in synchronization with each other.

As shown in detail in FIG. 1, the defoaming roller device 18 of the present invention comprises a lower roller member 20 and an upper roller member 21, and both roller members 20, 2 are provided.
It is arranged so as to sandwich the laminated sheets 7 continuously fed between the sheets 1. This arrangement is a laminated sheet 7
Direction perpendicular to the traveling direction of the sheet, that is, the laminated sheet 7
In the width direction. Here, although the lower roller member 20 has a cylindrical shape as in the conventional case, the upper roller member 21
Has a plurality of spiral-shaped protrusion rolling portions 22 formed on the outer periphery which is the surface. This spiral shape is formed in the right-hand screw direction corresponding to the direction in which each roller member 20, 21 is rotated via the shaft 20A, 21A.
Further, each protrusion rolling portion 22 is longer than the width dimension of the laminated sheet 7, and a groove portion 23 is formed between each protrusion rolling portion 22. In addition, such a protrusion rolling unit 2
It is preferable that the rolled corner portion of No. 2 is cut so as to have no edge.

In the structure in which the defoaming roller device 18 is incorporated, when both roller members 20 and 21 are rotated through the shafts 20A and 21A as the laminating sheet 7 advances, the laminating sheet 7 is placed inside the laminating sheet 7. Bubbles included 2
4 is for the lower roller member 20 and for the upper roller member 2
It is moved in the direction of arrow 25 by the projection rolling unit 22 at the proper position. As shown schematically in FIG. 1, this movement corresponds to the case where, for example, the bubble 24 is in the middle portion of the laminating sheet 7 and is sent to the front of both roller members 20 and 21. Along with the rotation of the protrusion rolling portion 22 to be moved in the width direction from the reference numeral 24a to the reference numeral 24b, further to the reference numeral 24c, finally from the side end portion of the bonding sheet 7 to the outside, that is, open to the atmosphere, Defoaming is complete. In this case, the adhesive P serves as a transfer medium that carries the bubbles 24, that is, a carrier. Reference numeral 25 in FIG. 1 indicates the movement trajectory of the bubble 24.

When applying the defoaming roller device 18 of the present invention as described above, the air bubbles 24 included in the initial state are included in the process in which the laminating sheet 7 is pressed sequentially or continuously. Since the bubbles gradually expand from the size and become stagnant at a certain size, it is preferable to apply the bubble 24 at a stage before the stagnant. In this form example,
This is an example in which the layer of the adhesive P is provided relatively thick, and the bubbles 2
4 is set so that the defoaming roller device 18 is actuated when the average outer diameter becomes about 3 to 4 mm. Further, the roller member 21, which is the main part of the present invention, is formed so that the spiral projection rolling portion 16 is formed into a multi-threaded screw shape, or is inclined in a range in which rotation is synchronized with the advancing direction of the bonding sheet 7. You can do it. In short, the invention can be further developed within the scope of the present invention.

[0015]

As described above, according to the present invention, the following effects can be obtained. As for the constituent members, it is easy because one of the rolling rollers has only a spiral-shaped protrusion rolling section, and it is easy to install and change part of the conventional rolling roller. It is easy to carry out with minimum cost. In terms of defoaming mechanism, air bubbles contained in the gap are continuously guided along the protrusion rolling portion of the roller member while being guided to the film side end portion while moving using the adhesive as a medium, and pushed out. It is suitable for the laminating process and has excellent work efficiency. When rolling continuously or sequentially, the roller member of the present invention can rotate synchronously with other conventional roller members for rolling, so that the laminated sheet is not scratched. The laminated sheet-like film obtained by applying the present invention does not increase the cost, and, for example, when printing is performed on the laminated surface, thin sheets such as ICs may be provided between the sheet-like films. Even when it is desired to make the adhesive layer relatively thick for reasons such as interposing an object, the bubbles contained during the adhesion are efficiently degassed, so quality deterioration can be prevented and reliability can be improved. .

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a main part shown as an example of one embodiment of the present invention.

FIG. 2 is a diagram schematically showing a step of laminating sheet-like films to which the present invention has been applied.

[Explanation of symbols]

 1, 2 ... Film (sheet film) 7 ... Laminating sheet 18 ... Defoaming roller device 20, 21 ... Roller member 22 ...・ Projection rolling part 24 ・ ・ ・ ・ ・ ・ Air bubbles P ・ ・ ・ ・ ・ ・ ・ ・ ・ Adhesive

Claims (3)

[Claims] 1. A method used in a step of successively bonding a plurality of sheet-shaped films with an adhesive and sending the films, wherein the sheet-shaped films that are bonded and sent are sandwiched between each other. With a pair of roller members arranged,
One of the roller members has a cylindrical shape, the other of the roller members forms a spiral-shaped protrusion rolling portion on the outer periphery, and the air bubbles included when the adhesive member is stuck to the other roller. A defoaming roller device, characterized in that it can be moved in the width direction along the protrusion rolling portion of the member so as to be guided to the side end portions of the sheet-like films. 2. The defoaming roller device according to claim 1, wherein the spiral protrusion rolling portion is formed in a multi-threaded screw shape. 3. A sheet-shaped film sent by laminating a plurality of sheet-shaped films with an adhesive is rolled while being sandwiched by a cylindrical roller member and a roller member with a spiral-shaped protruding rolling portion. Thereby, the bubbles included when the sheet-shaped films are stuck together with an adhesive are moved in the width direction along the protrusion rolling portion of the roller member and pushed out from the side end portions of the sheet-shaped films. A defoaming method characterized in that