WO2013084797A1

WO2013084797A1 - Reel member and film containing body

Info

Publication number: WO2013084797A1
Application number: PCT/JP2012/080987
Authority: WO
Inventors: 崇引地; 和典濱崎
Original assignee: デクセリアルズ株式会社
Priority date: 2011-12-05
Filing date: 2012-11-29
Publication date: 2013-06-13
Also published as: TWI649250B; KR102004565B1; JP2013116816A; JP5930274B2; CN103958384A; TW201341293A; KR20140099314A; CN103958384B

Abstract

A reel member (1) has a cylindrically shaped winding core shaft (2) and first and second flanges (11, 12) provided at both ends of the winding core shaft (2). An adhesive film (6) is wound around the winding core shaft (2). Reinforcement sections (3) having a given thickness are provided on the flanges (11, 12) at positions in the vicinity of the winding core shaft (2). Reduced-weight sections (4) are provided on the inside of the flanges (11, 12) at positions located further toward the outer peripheral side of the flanges than the reinforcement sections (3). The thickness of the reduced-weight sections (4) is less than the thickness of the reinforcement sections (3). The reduced-weight sections (4) are formed in a tapered shape and are thinnest on the outer peripheral side of the flanges. Ribs (5) for guiding the adhesive film (6) are provided on the inner portions of the flanges (11, 12). The deflection of the flanges (11, 12) due to the weight thereof is prevented, and as a result, the accuracy of the clearance (C) between opposing ribs (5) is improved.

Description

Reel member and film container

The present invention relates to a reel member technique for winding and drawing out a series of long adhesive films such as anisotropic conductive adhesive films.

Generally, for example, when electrically connecting electronic components such as a liquid crystal panel and an IC chip, an anisotropic conductive adhesive film in which conductive particles are dispersed in an insulating adhesive is used.

In recent years, a conductive adhesive film containing conductive particles in an insulating adhesive has been used as an adhesive film for electrically connecting and bonding electrodes for solar cells.
Such an adhesive film is formed on a narrow and long release sheet, and is shipped in the form of a reel member wound up in a roll shape.

In recent years, it has been desired to lengthen such an adhesive film. However, when the adhesive film becomes longer, the diameter of the film roll increases, and due to its own weight, deflection occurs in the outer peripheral portion of the flange portion of the reel member. There is a problem of hindering smooth withdrawal.
If the length of the adhesive film cannot be increased, it is necessary to frequently replace the reel member wound with the short adhesive film, and the production line is stopped each time, so that the production efficiency is lowered.

JP 2007-94662 A

The present invention has been made in consideration of the above-described problems of the prior art. The object of the present invention is to provide a reel member that winds and pulls out a long adhesive film, and a flange outer peripheral portion due to its own weight. It is an object of the present invention to provide a technique for improving the accuracy of the clearance between flanges by preventing the deflection.

The present invention made to achieve the above object includes a core shaft portion formed in a cylindrical shape and capable of winding an adhesive film, and first and second flanges provided at both ends of the core shaft portion. A reinforcing portion having a constant thickness in the vicinity of the core shaft portion of the first and second flange portions, and an inner portion of the first and second flange portions, and A weight reduction part formed so that the thickness is thinner than the thickness of the reinforcement part is provided on the flange outer peripheral side with respect to the reinforcement part, and further, on the inner part of the first and second flange parts, It is a reel member provided with a rib for guiding the adhesive film.
In the present invention, it is also effective when the lightening portion is formed in a tapered shape so that the thickness decreases from the reinforcing portion toward the outer peripheral portion of the flange.
In the present invention, the rib is also effective when the surface for guiding the adhesive film is provided on a surface orthogonal to the rotation direction of the reel member.
Moreover, this invention is a film container which has one of the reel members mentioned above, and the adhesive film wound up by the core shaft part of the said reel member.
In the present invention, it is also effective when the adhesive film is an anisotropic conductive adhesive film in which conductive particles are dispersed in an insulating adhesive.

In the case of the present invention, a reinforcing portion having a certain thickness is provided in the vicinity of the core shaft portion of the first and second flange portions, and is provided at the inner portion of the first and second flange portions and with respect to the reinforcing portion. The flange portion is provided with a lighter weight portion, for example, tapered so that the thickness is thinner than the thickness of the reinforcing portion. Since the weight of the outer peripheral portions of the first and second flange portions can be reduced, and the deflection of the flange outer peripheral portion due to the weight of the reel member can be prevented, the first and second flanges can be prevented. The accuracy of the clearance between the flange portions can be improved.
Further, in the present invention, since the ribs for guiding the adhesive film are provided in the inner portions of the first and second flange portions, the meandering of the adhesive film at the time of winding and drawing can be prevented. As a result, it is possible to prevent the adhesive film from dropping off during winding and the adhesive film from being caught or blocked during drawing.
In the present invention, when the surface of the rib for guiding the adhesive film is provided on the surface orthogonal to the rotation direction of the reel member, Since meandering can be more reliably prevented, it is possible to more reliably prevent the adhesive film from dropping off at the time of winding and the adhesive film from being caught or blocked at the time of withdrawal.

According to the present invention, in the reel member that winds and pulls out the long adhesive film, the deflection of the outer peripheral portion of the flange due to the weight of the reel member can be prevented, so that the accuracy of the clearance between the first and second flange portions can be prevented. Can be improved.
As a result, according to the present invention, it is not necessary to frequently replace the reel member in the adhesive film sticking step, and the production efficiency can be greatly improved.

(A): Plan view showing the inner structure of the embodiment of the reel member according to the present invention (b): AA line sectional view of FIG. 1 (a) (c): B— of FIG. 1 (a) B line cross section Sectional drawing which shows the whole structure of the reel member Sectional drawing which shows the whole structure of embodiment of the film container which concerns on this invention Explanatory drawing which shows the dimensional relationship of each part in the reel member of this invention Sectional drawing which shows the structure of the reel member of the comparative examples 1 and 2 Sectional drawing which shows the structure of the reel member of the comparative example 3 Sectional drawing which shows the structure of the reel member of the comparative example 4

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
1A is a plan view showing an inner configuration of an embodiment of a reel member according to the present invention, FIG. 1B is a cross-sectional view taken along line AA of FIG. 1A, and FIG. ) Is a cross-sectional view taken along the line BB of FIG.

The reel member 1 of the present embodiment is made of polystyrene resin from the viewpoint of ensuring dimensional stability. As shown in FIGS. 1A to 1C, the reel member 1 is driven by a film winding device or a film drawing device. The shaft 10 is attached.

The reel member 1 has, for example, a cylindrical core shaft portion 2 around which a long adhesive film such as an anisotropic conductive adhesive film is wound. The first and

second flange portions

11 and 12 are integrally provided.

In the case of the present embodiment, the first and

second flange portions

11 and 12 are formed so that the outer surfaces thereof are planes orthogonal to the rotation axis O, and have the same configuration. Hereinafter, in this specification, it demonstrates taking the 1st flange part 11 as an example.

For example, a circular reinforcing portion 3 is provided around the core shaft portion 2 of the first flange portion 11.
The reinforcing portion 3 has an inner surface formed parallel to the outer surface of the first flange portion 11 and is formed to have a constant width.

A lighter portion 4 is provided on the inner peripheral portion of the first flange portion 11 on the outer peripheral portion side with respect to the reinforcing portion 3.
The lightening portion 4 is formed in a tapered shape so that the thickness is thinner than the reinforcing portion 3 from the reinforcing portion 3 toward the outer peripheral portion side.
In the present embodiment, the surface (inner side surface) of the light weight portion 4 is formed in a flat shape.

Furthermore, ribs 5 for guiding the adhesive film are provided on the inner portion of the first flange portion 11 and on the outer peripheral portion side with respect to the core shaft portion 2.
The rib 5 has a plurality of inner guide portions 5 a that extend radially around the rotation axis O of the reel member 1 and a circular outer guide portion 5 b provided on the outer edge of the first flange portion 11. is doing.

Each portion of the rib 5 is placed on a plane parallel to the outer surface 11a of the first flange portion 11, that is, on a plane orthogonal to the rotation axis O so that the height is slightly higher than the reinforcing portion 3. Are formed such that the top surfaces of the inner guide portion 5a and the outer guide portion 5b are positioned.
A predetermined radius is applied to each top surface of the rib 5.

FIG. 2 is a cross-sectional view showing the overall configuration of the reel member of the present embodiment.
Moreover, FIG. 3 is sectional drawing which shows the whole structure of embodiment of the film container which concerns on this invention.
The reel member 1 shown in FIG. 2 is mounted on a film take-up device (not shown), and a long adhesive film 6 is wound around the core shaft 2 to obtain the film container 20 shown in FIG.

FIG. 4 is an explanatory view showing the dimensional relationship of each part in the reel member 1 of the present invention.
The reel member 1 according to the present invention is effective for a long (300 to 600 m) adhesive film 6 and has first and

second flange portions

11 and 12 having large diameters.

Specifically, the diameters of the first and

second flange portions

11 and 12 are 250 to 300 mm, and the distance between the first and

second flange portions

11 and 12, that is, the thickness t of the core shaft portion 2 is 1.00. This is particularly effective when the thickness is ˜1.30 mm.

In this case, the diameter d of the core shaft portion 2 is (diameter of the first and

second flange portions

11 and 12 / 2.5) from the viewpoint of securing necessary rigidity and reducing the weight of the outer peripheral portion of the flange. It is preferable to set to ± 10%.
In this case, it is preferable to set to about 100 mm from the viewpoint of reducing the weight of the outer peripheral portion of the flange.

Further, the diameter D of the reinforcing portion 3 is (diameter of the first and

second flange portions

11 and 12 / 1.5) ± 10% from the viewpoint of securing necessary rigidity and reducing the weight of the outer peripheral portion of the flange. It is preferable to set to.
Specifically, the diameter D of the reinforcing portion 3 is preferably 183 to 150 mm, but is preferably set to about 150 mm from the viewpoint of reducing the weight.

In addition, the ratio H ₁ : H ₂ of the thickness of the center side end portion and the outer peripheral side end portion of the lightening portion 4 is preferably from the viewpoint of securing necessary rigidity and reducing the weight of the flange outer peripheral portion. 5: 4 to 3: 2 and more preferably 4: 3.
Specifically, the size H ₁ of the preferred lightening portion 4 on the center side is 1.90 to 2.10 mm, and the preferred size H ₂ of the lightening portion 4 on the outer peripheral side is 1.45 to 1.55 mm.

Further, the height h of the outer peripheral portion (outer guide portion 5b) of the rib 5 is preferably 0.4 to 0.5 mm from the viewpoint of securing necessary rigidity and reducing the weight of the flange outer peripheral portion. .
Furthermore, the interval (clearance) C between the ribs 5 is 0.05 to 0. 0 with respect to the width of the adhesive film 6 from the viewpoint of preventing the adhesive film from sticking to the rib surface and preventing the adhesive film from dropping into the gap. It is preferable to set so as to be 10 mm apart.

On the other hand, the number of the inner guide portions 5a of the rib 5 is preferably increased as the reel diameter increases.
In the range to which the present invention is applied, 8 to 24 are preferable, and 12 to 24 are more preferable.

If the number of the inner guide portions 5a of the rib 5 is less than eight, the adhesive film 6 may be left in a horizontal position after winding the adhesive film 6 or may be displaced during transportation. On the other hand, the number of the inner guide portions 5a of the rib 5 If there are more than 24, there is a possibility that the adhesive film 6 may run up during winding, and at the same time, the risk of adhesion of the adhesive film 6 to the rib surface increases.
In order to increase the diameter of the reel member 1, it is possible to employ a configuration in which many ribs 5 (inner guide portions 5 a) are provided on the outer peripheral portions of the first and

second flange portions

11 and 12.

In the present embodiment described above, the reinforcing portion 3 having a certain thickness is provided in the vicinity of the core shaft portion 2 of the first and

second flange portions

11 and 12, and the first and second flange portions 11 are provided. , 12 and a portion on the outer peripheral side of the flange with respect to the reinforcing portion 3 is provided with a lightening portion 4 formed in a tapered shape so that the thickness is thinner than the thickness of the reinforcing portion 3. Therefore, the rigidity of the reel member 1 can be ensured by the reinforcing portion 3 having a certain thickness, and the weight of the outer peripheral portions of the first and

second flange portions

11 and 12 can be reduced. Since the deflection of the outer peripheral portion of the flange due to its own weight can be prevented, the accuracy of the clearance between the first and

second flange portions

11 and 12 can be improved.

Furthermore, in the present embodiment, ribs 5 for guiding the adhesive film 6 are provided on the inner portions of the first and

second flange portions

11 and 12, and the surface of the rib 5 for guiding the adhesive film 6 is provided. Since the reel member 1 is provided so as to be positioned on a surface orthogonal to the rotation direction of the reel member 1, the meandering of the adhesive film 6 at the time of winding and pulling out can be surely prevented. It is possible to reliably prevent the adhesive film 6 from dropping off at the time of take-off and the adhesive film 6 from being caught or blocked from being taken out.

EXAMPLES Hereinafter, although an Example and a comparative example are given and this invention is demonstrated concretely, this invention is not limited to a following example.
<Creation of adhesive film>
As the adhesive film 6, an anisotropic conductive adhesive having a thickness of 25 μm after drying on a release sheet (not shown) having a width of 1.0 mm was used. The type of adhesive is an epoxy thermosetting type.

Here, the minimum melt viscosity of the anisotropic conductive adhesive film is 3.0 × 10 ⁴ Pa · s.
This minimum melt viscosity is a value measured by using a measuring plate having a diameter of 8 mm, using a rotary rheometer (manufactured by TA instrument), keeping the heating rate constant at 10 ° C./min, measuring pressure at 5 g. is there.

<Example 1>
As the reel member 1, a double-sided flange type made of polystyrene resin, having a diameter of the core shaft portion 2 of 100 mm, a thickness of 1.25 mm, and a diameter of the first and

second flange portions

11 and 12 of 250 mm is used. It was. This is of the configuration shown in FIG.

The reinforcing portion 3 of the reel member 1 has a thickness of 2.0 mm and a width D of 150 mm.
Further, the light weight portion 4 is formed in a flat tapered shape, the height H ₁ at the flange inner peripheral portion is 2.0 mm which is the same as the thickness of the reinforcing portion 3, and the thickness H ₂ at the flange outer peripheral portion is 1.5 mm. It was made to become.

On the other hand, the height h at the flange outer peripheral portion (outer guide portion 5 b) of the rib 5 was set to 0.5 mm from the inner surfaces of the first and

second flange portions

11 and 12.
Further, twelve inner guide portions 5a of the rib 5 are provided at equal intervals.
An anisotropic conductive adhesive film 6 having a length of 500 m was wound around the reel member 1 as the adhesive film 6.

<Comparative Example 1>
As shown in FIG. 5, the tapered lightening portion 4 is not formed, the thickness of the first and

second flange portions

11 and 12 is 2 mm, and the inner guide portion 50a and the outer guide portion 50b of the rib 5A. The height was set to 0.1 mm from the flange inner surface 40. This reel member 1A has a configuration of a conventional reel member.
And the diameter of the 1st and

2nd flange parts

11 and 12 was 195 mm, and the 300-m-long adhesive film 6 was wound up.

<Comparative example 2>
A reel member 1A in which the diameters of the first and

second flange portions

11 and 12 are 250 mm in the shape shown in FIG. 5 was created, and the adhesive film 6 having a length of 500 m was wound up.

<Comparative Example 3>
As shown in FIG. 6, while the tapered lightening part 4A is formed on the inner surface of the first and

second flange parts

11 and 12, the height of the inner guide part 50a and the outer guide part 50b of the rib 5B is increased. It was set to 0.1 mm from the inner surface of the flange.
Other than that, the reel member 1B was created under the same conditions as in the example, and the adhesive film 6 having a length of 300 m was wound up.

<Comparative Example 4>
As shown in FIG. 7, a reel member 1C was prepared under the same conditions as in the example except that a tapered lightening portion 4A was formed without providing a reinforcing portion, and an adhesive film 6 having a length of 500 m was wound up. .

<Evaluation>
The reel members (film containers) prepared according to the examples and comparative examples 1 to 4 are left in a room temperature environment for 24 hours, respectively, and the clearance between the first and

second flange portions

11 and 12 at the outer periphery of the flange is reflected by the laser. It measured using the type | formula displacement meter. The results are shown in Table 1.
In the examples and comparative examples 1 to 4, the state of the adhesive film 6 at the time of winding (dropping off, etc.) was visually observed. The results are shown in Table 1.

Further, the adhesive film 6 was drawn out for 1 second at a pulling tension of 50 g and a pulling speed of 500 mm / second with an interval of 1 second until the end, and the state of the adhesive film 6 at the time of drawing and after drawing (at the time of drawing) Catch, blocking, and cutting) were visually observed. The results are shown in Table 1.

<Evaluation results>
As is clear from Table 1, in the case of Comparative Examples 1 and 2 in which the reinforcing part and the tapered lightening part are not provided, when the length of the adhesive film 6 is as short as 300 m (Comparative Example 1), the outer circumference of the flange When the deviation of the clearance at the part is small (1.15 ± 0.1 mm) and no problem occurs at the time of winding and pulling out, the length of the adhesive film 6 is increased to 500 m (Comparative Example 2). In this case, the clearance deviation in the outer peripheral portion of the flange was increased (1.15 ± 0.4 mm), and at the time of drawing, it was caught, blocked, and cut.

Further, Comparative Example 3 in which the tapered lightening portion 4A is formed on the inner side surfaces of the first and

second flange portions

11 and 12, while the height of the rib 5B is 0.1 mm from the inner side surface of the reel member 1B. In this case, even when the diameters of the first and

second flange portions

11 and 12 are 250 mm, the clearance deviation in the outer peripheral portion of the flange is large (1.15 ± 0.2 mm), and adhesion is performed during winding. The film 6 was unwound and dropped.

Furthermore, while forming the taper-shaped lightweight part 4A in the inner surface of the 1st and

2nd flange parts

11 and 12, it is the comparative example 4 which made the height of the rib 5 in the flange outer peripheral part 0.5 mm same as an Example. Then, the length of the adhesive film 6 could be increased to 500 m, but the clearance deviation in the outer peripheral portion of the flange was large (1.15 ± 0.2 mm), and it was caught when pulled out.

In contrast, the reinforcing portion 3 and the tapered lightening portion 4 are formed on the inner side surfaces of the first and

second flange portions

11 and 12, and the height of the rib 5 at the outer peripheral portion of the flange is 0.5 mm. In the example, even when the length of the adhesive film 6 is increased to 500 m, the clearance deviation at the outer peripheral portion of the flange is small (1.15 ± 0.1 mm). It was 1 mm or less.
Furthermore, in the examples, no problems occurred during winding and withdrawal.

From the above results, according to the present invention, it was proved that the deflection of the outer peripheral portion of the flange due to the weight of the reel member can be prevented and the accuracy of the clearance between the first and second flange portions can be improved.

DESCRIPTION OF SYMBOLS 1 ... Reel member 2 ... Core shaft part 3 ... Reinforcement part 4 ... Lightening part 5 ... Rib 5a ... Inner guide part 5b ... Outer guide part 6 ... Adhesive film 10 ... Drive shaft 11 ... First flange part 12 ... Second Flange part O ... rotation axis

Claims

A core shaft portion formed in a cylindrical shape and capable of winding an adhesive film;
Comprising first and second flange portions provided at both ends of the core shaft portion;
A reinforcing portion having a certain thickness is provided in the vicinity of the core shaft portion of the first and second flange portions,
A weight reduction part formed so that the thickness is thinner than the thickness of the reinforcing part is provided on the inner part of the first and second flange parts and on the flange outer peripheral side with respect to the reinforcing part. ,
Furthermore, the reel member by which the rib for guiding the said adhesive film is provided in the inner part of the said 1st and 2nd flange part.
The reel member according to claim 1, wherein the lightening portion is formed in a taper shape so that the thickness thereof decreases from the reinforcing portion toward the outer peripheral portion of the flange.
3. The reel member according to claim 1, wherein the rib is provided such that a surface for guiding the adhesive film is positioned on a surface orthogonal to a rotation direction of the reel member.
The first and second flange portions are provided with a core shaft portion formed in a cylindrical shape and capable of winding an adhesive film, and first and second flange portions provided at both ends of the core shaft portion. A reinforcing portion having a constant thickness is provided in the vicinity of the core shaft portion of the first and second flange portions, and a thickness is provided on the inner portion of the first and second flange portions and on the outer peripheral side of the flange with respect to the reinforcing portion. A light weight portion formed so as to be thinner than a thickness of the reinforcing portion is provided, and a rib for guiding the adhesive film is provided on an inner portion of the first and second flange portions. A reel member,
A film container having an adhesive film wound around a core shaft portion of the reel member.
The film container according to claim 4, wherein the adhesive film is an anisotropic conductive adhesive film in which conductive particles are dispersed in an insulating adhesive.