TW201532935A - Reel member and film housing body - Google Patents

Abstract

This reel member comprises: a core spindle (2) that is formed into a cylinder and on which an adhesive film, which is a base film with an adhesive layer provided thereon, can be traverse wound; a first and a second flange (11, 12) that are provided on each end of the core spindle (2); and a first and a second guiding portion (21, 22) that are provided around the periphery on the inside of the first and the second flanges (11, 12) and that guide the adhesive film. The first and the second guiding portions (21, 22) are formed to be tapered so as to become wider from the core spindle (2) toward the outer edges of each of the first and the second flanges (11, 12).

Description

Reel assembly and film container

The present invention relates to a technique of a reel assembly for winding and pulling out a strip of strips of a solar cell for wire bonding or the like.

In the past, a continuous film for elongating a plurality of electronic components or the like has been known.

Such a film is formed on a base film having a narrow width on a long strip, and is fed out in a roll form in a roll form.

However, in recent years, although such a film strip is desired, when the film is elongated, the stress of the film is increased due to an increase in the radius of the film roll, particularly at the core portion, so that there is a subsequent The adhesive in the film overflows and may adhere to the flange portion.

With regard to such a problem, the above problem can be solved by forming a wide width of the winding core portion of the reel assembly and performing so-called reciprocating winding on the film.

However, in the case where the film is wound by reciprocating winding, the adhesive which has overflowed from the film adheres to the flanges at both ends, and the film is not normally pulled out, which may cause a so-called interruption.

On the other hand, in order to prevent the adhesive which overflows from the film from adhering to the flange, if the interval between the flange and the film roll is increased, the film is subsequently taken up after the film is wound up. It will enter between the flange and the film roll, and there may be a so-called peeling of the film.

Further, as a prior art document related to the present invention, it is exemplified below.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] JP-A-2011-11792

The present invention has attained the following objects in order to solve the above-mentioned plurality of problems. That is, it is an object of the present invention to provide a technique for smoothly winding a very long strip of film onto a reel assembly and capable of being smoothly pulled from the reel assembly.

The means for solving the above problems are as follows. which is,

<1> A reel assembly comprising: a winding core portion formed in a cylindrical shape, capable of reciprocatingly winding an adhesive film on which an adhesive layer is provided on a base film; and a pair of flange portions provided at the same Both ends of the core shaft portion; and a pair of guiding portions respectively surrounding the inner side of each of the flange portions for guiding the adhesive film; wherein the pair of guiding portions are respectively directed from the winding core portion The outer edge portion of the flange portion has a tapered shape in which the width thereof is widened.

The reel assembly according to the above <1>, wherein the adhesive film overflows from the adhesive film toward the rotation axis of the winding core portion when the adhesive film is wound around the reel assembly When the distance is X and the thickness of the base film of the adhesive film is Y, the inclination angle θ of the surface of the guide portion with respect to one of the rotational axis directions of the core shaft portion is set to satisfy θ < tan ^-1 (Y). /X)

Relationship.

<3> A film container comprising: a reel assembly, the reel assembly according to any one of the above <1> to <2>; and a film roll which is wound around the reel in a reciprocating winding An adhesive film of the winding core portion of the assembly; wherein the adhesive film of the both ends of each layer of the film roll is supported separately in a state in which the base film contacts the surface of the pair of guiding portions.

In the present invention, the pair of guiding portions are respectively disposed around the inner side of the pair of flange portions, and the pair of guiding portions are formed into a tapered shape from the winding core portion toward the outer edge portion of the pair of flange portions. a shape in which, in the case where the film is wound around the winding core portion of the reel assembly by reciprocating winding, an adhesive film at both ends of each layer of the film roll is attached to the base film to contact a pair of guiding portions The state of the surface is supported in a row along the surface of the pair of guiding portions.

As a result, according to the present invention, the overflow portion of the adhesive layer of the film is not brought into contact with the surface contacting the respective guide portions, and the interruption at the time of pulling out the film can be prevented.

Further, since there is no gap between the film at the both end portions of the film roll and each of the flange portions, it does not enter between the flange portions and the film roll when the film is wound up, thereby preventing the so-called subsequent The film is detached.

In the present invention, when the film is wound around the reel assembly, the distance from the adhesive layer which overflows the film to the axis of rotation of the winding core portion is X, and then the thickness of the base film of the film is Y. When the inclination angle θ of one of the directions of the rotation axis of the winding core portion is set to satisfy the relationship of θ<tan ^-1 (Y/X), the adhesive layer of the film can be surely prevented. The overflow portion contacts the surface of each of the guide portions.

According to the present invention, it is possible to solve the above-mentioned problems by solving a plurality of problems in the past, and the extremely long follow-up film is smoothly wound around the reel assembly and can be smoothly pulled out from the reel assembly.

As a result, according to the present invention, in the subsequent attachment process of the film, the reel assembly is not frequently exchanged, and the production efficiency can be greatly improved.

1‧‧‧Roll assembly

1A‧‧ ‧ reel assembly

2‧‧‧Rolling shaft part

2A‧‧‧Rolling shaft part

3‧‧‧ Hole Department

4‧‧‧Internal space

5‧‧‧Axis core

5a‧‧‧Drive shaft support

7‧‧‧film housing

10‧‧‧Next film

10A‧‧‧Next film

11‧‧‧First flange

12‧‧‧Second flange

13‧‧‧Flange

15‧‧‧Base film

15a‧‧‧ Lower margin

16‧‧‧ adhesive layer

17‧‧‧Release film

20‧‧‧Next film roll

21‧‧‧First Guidance

22‧‧‧Second guidance

26‧‧‧ Surface

30‧‧‧Winding drive shaft

31‧‧‧ Guide groove

32‧‧‧Guide roller

33‧‧‧Guide roller drive shaft

D‧‧‧diameter

D1‧‧‧diameter

D2‧‧‧diameter

D‧‧‧diameter

O‧‧‧Rotation axis

P‧‧‧ interval

T‧‧‧ thickness

T‧‧‧thickness

W1‧‧‧ thickness

W1‧‧‧ thickness

W2‧‧‧ thickness

W2‧‧‧ thickness

X‧‧‧ overflow distance

Y‧‧‧ thickness

Θ‧‧‧ cone angle

[Fig. 1A] Fig. 1A is a side view showing the structure of an embodiment of a reel assembly of the present invention.

1B] FIG. 1B is a front elevational view of the reel assembly of FIG. 1A.

2A] Fig. 2A is a cross-sectional view taken along line A-A of Fig. 1A.

[Fig. 2B] Fig. 2B is an explanatory view schematically showing the dimensional relationship of the reel assembly of the present invention.

[Fig. 3A] Fig. 3A is a front elevational view showing the structure of an embodiment of the film storage body of the present invention.

[Fig. 3B] Fig. 3B is a view showing a cross section of a film which is attached to the film container of the present invention.

[Fig. 4A] Fig. 4A shows the film of the following film wound around the core portion of the reel assembly of the present invention. An illustration of the interval.

[Fig. 4B] Fig. 4B is an explanatory view showing the interval of the film which is wound around the core shaft portion of the reel assembly of the present invention.

Fig. 5A is a schematic view for explaining the problem of the present invention.

Fig. 5B is a schematic view for explaining the problem of the present invention.

[Fig. 6A] Fig. 6A is a schematic view for explaining the principle of the present invention.

[Fig. 6B] Fig. 6B is a schematic view for explaining the principle of the present invention.

[Fig. 7] Fig. 7 is a view (1) showing an example of a method of manufacturing a film container of the present invention.

[Fig. 8A] Fig. 8A is a view (2) showing an example of a method of manufacturing a film container of the present invention.

[Fig. 8B] Fig. 8B is a view showing an example of a method of manufacturing the film container of the present invention (the

2). [Fig. 9A] Fig. 9A is a side view showing the configuration of another embodiment of the present invention.

[Fig. 9B] Fig. 9B is a front elevational view of the reel assembly of Fig. 9A.

Fig. 10A is a cross-sectional view taken along line C-C of Fig. 9B.

Fig. 10B is a cross-sectional view taken along line B-B of Fig. 9A.

[Fig. 11] Fig. 11 is a side view schematically showing the dimensional relationship of the reel assembly of the embodiment. Illustrating.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

The present invention is not particularly limited, and a long adhesive film is preferred.

The film width is preferably from 0.6 mm to 3.0 mm, and the thickness of the adhesive layer formed on the base film is preferably from 10 μm to 50 μm.

Further, the minimum melt viscosity of the adhesive is preferably 1 x 10 ³ Pa ‧ s - 5 x ^{10 5} Pa ‧ s.

Moreover, the thickness of the base film will be described later.

Further, although the present invention may preferably be a so-called two-layer type article having no release film on the adhesive layer, a release film is provided on the adhesive layer from the viewpoint of preventing breakage when the film is pulled out. The so-called three-layer type is particularly effective.

Fig. 1A is a side elevational view showing the structure of an embodiment of a reel assembly of the present invention, and Fig. 1B is a front view of the same reel assembly.

2A is a cross-sectional view taken along line A-A of FIG. 1A, and FIG. 2B is an explanatory view schematically showing a dimensional relationship of the reel assembly of the present invention.

Since the reel assembly 1 of the present embodiment is integrally molded of a resin such as polystyrene or polycarbonate, it is attached to a drive shaft of a film take-up device or a film take-up device not shown.

This reel assembly 1 has a cylindrical core portion 2 of a cylindrical shape wound around a film.

A pair of flange portions are formed at both end portions of the winding core portion 2, and the first flange portion 11 and the second flange portion 12 are provided.

In the case of the present embodiment, the first flange portion 11 and the second flange portion 12 are formed in the same original plate shape, and are perpendicular to the rotation axis O of the winding core shaft portion 2, and are disposed concentrically.

A portion of the inner side of the first flange portion 11 and the second flange portion 12 (on the side of the core shaft portion 2) guides a pair of guiding portions of the film, and is provided with a first guiding portion 21 and a second portion. Guide portion 22.

The first guiding portion 21 and the second guiding portion 22 are formed in a tapered shape from the winding mandrel portion 2 toward the outer edge portion of the first flange portion 11 and the second flange portion 12 (reverse tapered shape) Shape, truncated cone shape).

In the case of the present embodiment, the first guiding portion 21 and the second guiding portion 22 are formed in the same shape and the same size.

Here, the bottom surface of the first guiding portion 21 is formed to have the same shape and size as the first flange portion 11, and the top surface of the first guiding portion 21 is formed to have the same shape and size as the winding core portion 2.

Further, the bottom surface of the second guiding portion 22 is formed to have the same shape and size as the second flange portion 12, and the top surface of the second guiding portion 22 is formed to have the same shape and size as the winding core portion 2.

Then, the first guiding portion 21 and the second guiding portion 22 are respectively formed at the same height (thickness).

Further, the installation hole portion 3 penetrates the first flange portion 11, the first guide portion 21, the winding core portion 2, the second guide portion 22, and the second flange portion 12.

Further, the spool unit 1 is attached to the drive shaft by inserting the hole portion 3 into a drive shaft (not shown) of the film take-up device or the film take-up device.

As shown in FIG. 2B, in the present specification, the diameter (outer diameter) of the first flange portion 11 and the second flange portion 12 of the reel assembly 1 is D, the first flange portion 11 and the second flange portion. The thickness (width) of 12 is W1, W2.

Further, the diameter (outer diameter) of the winding core portion 2 is d, and the thickness (width) of the winding core portion 2 is T.

Furthermore, the thickness of the first guiding portion 21 and the second guiding portion 22 is t.

In the case of the present invention, the diameter D of the first flange portion 11 and the second flange portion 12 is preferably set to 125 mm to 190 mm from the viewpoint of space saving at the time of roll attachment.

Further, in the case of the present invention, although not particularly limited, space saving at the time of installation of the reel From the viewpoint of the above, the thicknesses W1, W2 of the first flange portion 11 and the second flange portion 12 are preferably set to 2 mm to 5 mm.

Further, in the case of the present invention, the thickness T of the core shaft portion 2 is preferably set to 10 mm to 30 mm from the viewpoint of preventing winding collapse.

On the other hand, in the case of the present invention, the thickness t (width) of the first guiding portion 21 and the second guiding portion 22, as will be described later, considers the first guide in the direction of the rotational axis O of the winding core portion 2. The inclination angle (taper angle θ) of the surface of the lead portion 21 and the second guide portion 22 is set.

The reel assembly 1 of the present invention can be manufactured by a variety of methods.

For example, the first flange portion 11, the second flange portion 12, the winding core portion 2, the first guiding portion 21, and the second guiding portion 22 are respectively formed by injection molding or the like, and can be welded ( Heat, ultrasonic) to fix these objects for manufacturing.

Moreover, it can also be manufactured by integrally molding the above-described reel assembly 1.

Fig. 3A is a front elevational view showing the structure of the embodiment of the film container of the present invention, and Fig. 3B is a view showing a cross section of the film in the same film container.

The film storage body 7 of the present embodiment is attached to the winding core portion 2 of the above-described spool unit 1, and the film 10 is wound by reciprocating winding.

Here, the reciprocating winding means that a plurality of layers are spirally wound at a specific pitch (interval) on a winding core.

4A and 4B are explanatory views showing the interval of the film which is wound around the core shaft portion of the reel assembly of the present invention.

In the present invention, the film 10 is wound around the winding core portion 2 of the reel unit 1 so that the interval p between the adjacent adhesive films 10 becomes a specific value (see FIG. 4A); then The film 10 is superposed and wound around the adhesive film 10 so that the interval p between the adjacent adhesive films 10 becomes a specific value (see FIG. 4B).

In this case, although the interval p between the adjacent adhesive films 10 is not particularly limited, it is preferably set to 0.05 mm to 0.1 mm.

If the interval p of the adjacent adhesive films 10 is less than 0.05 mm, in the film width direction, the adhesive may overflow with the adjacent adhesive film 10; on the other hand, if it is larger than 0.1 mm, the film 10 is wound up. At this time, winding collapse may occur, and in the case of the two-layer type, the gap between the adjacent film 10 contacting the upper and lower layers of the film 10 may be interrupted.

5A and 5B are schematic views for explaining the subject of the present invention.

Here, a so-called three-layer type bonding film 10 in which the adhesive layer 16 and the release film 17 are provided on the base film 15 will be described as an example.

In the conventional technique, in the case where the above-described film 10 is wound in a reel-winding in the roll unit, the film conveyance is controlled so that the film roll 20 is adhered in consideration of the overflow of the adhesive layer 16 from the width direction of the film 10. The adhesive film 10A at the end of each layer does not contact the flange portion 13.

However, it is difficult to accurately control the film conveyance, and since the position of each film 10 is dispersed in the film roll 20, the film transfer is controlled in consideration of the dispersion.

In this case, if the interval between the film 10A and the flange portion 13 of the end portion of the film roll 20 is small, for example, as shown in Fig. 5A, the adhesive layer 16 from which the film 10A overflows contacts the flange portion 13 and adheres thereto. The agent, which cannot be pulled out normally and then the film 10, may cause a so-called interruption.

On the other hand, in order to prevent the adhesive layer 16 which overflows from the adhesive film 10A at the end portion of the film roll 20 from coming into contact with the flange portion 13, if the film of the end portion of the film roll 20 is followed by the film The distance between the 10A and the flange portion 13 is large. For example, as shown in FIG. 5B, when the film 10 is wound up, the end film 10A of the end portion enters between the flange portion 13 and the film roll 20, which may occur. The film is detached.

On the other hand, in the present invention, the above-described problems are solved by the following configuration.

6A and 6B are schematic views for explaining the principle of the present invention.

As described above, in the present invention, the first guiding portion 21 and the second guiding portion 22 are respectively disposed around the inner sides of the first flange portion 11 and the second flange portion 12, and the first guiding portions 21 and The second guide portion 22 is formed in a tapered shape from the winding mandrel portion 2 toward the outer edge portion of the first flange portion 11 and the second flange portion 12, respectively.

Then, when the film 10 is wound around the reel unit 1 by reciprocating winding, the film 10A wound around the both ends of each layer of the film roll 20 is formed by the outer edge of the outer side of the base film 15. The portion 15a contacts the surfaces of the first guiding portion 21 and the second guiding portion 22 to be respectively supported (refer to FIG. 6B).

In the present invention, the surface 26 of the first guiding portion 21 and the second guiding portion 22 is set at an angle (cone angle θ) with respect to the direction of the rotation axis O of the winding core portion 2, for example, as described below.

In other words, in the embodiment shown in FIG. 6B, when the film 10 is wound around the roll unit 1, the adhesive layer overflows in the width direction of the film 10 (the direction of the rotation axis O of the winding core portion 2). When the distance of 16 is X, and the thickness of the base film 15 of the film 10 is Y, it is set to θ < tan ^-1 (Y/X) (1).

In this case, the thickness Y of the base film 15 of the film 10 is a known predetermined one.

Moreover, when the film 10 is wound around the reel assembly 1, it overflows in the width direction of the film 10 The distance of the adhesive layer 16 (the overflow distance X of the adhesive) can be known by prediction.

Further, in the case where the overflow distance X of the adhesive has a non-uniform range, it is preferable to use the maximum value as the overflow distance X of the adhesive.

Then, according to the present embodiment having such a configuration, in the state in which the film 10 is wound around the reel unit 1, the film 10A at the both end portions of the film roll 20 is supported by the first guide portion 21 and the second portion. The surface 26 of the guiding portion 22 is aligned along the surface 26, but it is known from the formula (1) that since the overflow distance X of the adhesive is smaller than Y/tan θ, the overflow portion of the adhesive layer 16 does not contact the first portion. a surface of the guiding portion 21 and the second guiding portion 22.

As a result, according to the present embodiment, the overflow portion of the adhesive layer 16 of the film 10 does not contact the surfaces of the first guiding portion 21 and the second guiding portion 22, and the interruption when the film 10 is pulled out can be prevented.

Further, since there is no gap between the adhesive film 10A at both end portions of the film roll 20 and the first guide portion 21 and the second guide portion 22, the film is not fed to the first guide when the film 10 is wound up. Between the lead portion 21 and the second guiding portion 22 and the film roll 20, the so-called peeling of the film can be prevented.

Further, in the case of using the above-mentioned adhesive, specifically, the thickness Y of the base film 15 is 35 μm to 80 μm; specifically, the overflow distance X of the adhesive is 30 μm to 50 μm.

Then, in the case where such a film 10 is wound around the above-described reel assembly 1, the taper angle θ of the first guiding portion 21 and the second guiding portion 22 is preferably set to be less than 60°.

However, considering the weight reduction and miniaturization of the reel unit 1, the taper angle θ of the first guide portion 21 and the second guide portion 22 is preferably set to be 50° or more.

Then, considering the above points, specifically, the first guiding portion 21 and the second guiding portion 22 The thickness t is preferably set to 2 mm to 5 mm.

7, 8A and 8B show an example of a method of manufacturing the film container of the present invention.

For the production of the film storage body described above, for example, a film winding device as shown in Figs. 7, 8A and 8B is preferably used.

This film take-up device has a take-up drive shaft 30 coupled to a drive mechanism not shown, which is configured to mount the above-described spool assembly 1 to the take-up drive shaft 30.

A guide roller 32 is provided in the vicinity of the take-up drive shaft 30, and has a guide groove 31 on the surface (see Figs. 8A and 8B).

The guide roller 32 is configured to be driven by a guide roller drive shaft 33 which is provided in parallel with the take-up drive shaft 30 and movable in the axial direction.

When the film 10 is wound around the reel assembly 1 by using the film take-up device, the film 10 pulled out from the film supply source (not shown) straddles the guide groove 31 of the guide roller 32, and the film 10 is attached. The front end portion is attached to one end portion of the winding core portion 2.

Then, in this case, the take-up drive shaft 30 is rotated in the winding direction.

In this case, as shown in FIG. 8A and FIG. 8B, the guide roller drive shaft 33 is moved in the axial direction, and then the film 10 is in the direction of the take-up drive shaft 30 at the first guiding portion 21 and the second guiding portion. Move between 22.

Then, by repeating this operation, in a state where the outer edge portion of the base film 15 of the film 10 is in contact with the first guiding portion 21 and the second guiding portion 22, the film 10 is then wound by reciprocating winding. On the core shaft portion 2 of the reel assembly 1. Thereby, the film container 7 which is expected is obtained.

9 to 11 show other embodiments of the present invention, and Fig. 9A shows the present embodiment. A side view of the structure of the embodiment, and Fig. 9B is a front view of the same reel assembly.

10A is a cross-sectional view taken along line C-C of FIG. 9B, and FIG. 10B is a cross-sectional view taken along line B-B of FIG. 9A.

In the following, the detailed description of the same reference numerals will be given to the parts corresponding to the above embodiments.

The spool unit 1A of the present embodiment has a cylindrical core shaft portion 2A which is thinner than the winding core portion 2 of the above-described embodiment.

A cylindrical core portion 5 is provided in the internal space 4 of the winding mandrel portion 2A.

The axial core portion 5 is disposed concentrically with the winding core portion 2A at a smaller radius than the winding core portion 2A, and is fixed to the inner wall portions of the first guiding portion 21 and the second guiding portion 22.

Then, the above-mentioned hole portion 3 is provided to correspond to the drive shaft support portion 5a of the inner wall portion of the shaft core portion 5, and the drive shaft is inserted into the hole portion 3 and supported by the drive shaft support portion 5a to become the reel assembly 1A. The structure mounted on the drive shaft.

Fig. 11 is a side explanatory view schematically showing the dimensional relationship of the reel assembly of the embodiment.

In the case of this embodiment, the diameter (outer diameter) of the core shaft portion 2A is d1, and the thickness (width) is w1.

Further, the diameter (inner diameter) of the drive shaft support portion 5a of the shaft core portion 5 is d2 and the thickness is w2.

In the case of the present embodiment, the diameter d1 of the core shaft portion 2A of the spool unit 1A is preferably set to 50 mm from the viewpoint of securing the necessary rigidity when the long film 10 is wound. 130 mm, the thickness w1 of the core shaft portion 2A is preferably set to 1.5 mm to 5.0 mm.

Further, in the case of the present embodiment, the core of the reel assembly 1A is not particularly limited, but the core of the reel assembly 1A is obtained from the viewpoint of securing the necessary rigidity when the elongate film 10 is taken up and pulled out. The diameter d2 of the drive shaft support portion 5a of the portion 5 is preferably set to 18.0 mm to 26.0 mm, and the thickness w2 of the shaft core portion 5 is preferably set to 1.0 mm to 2.5 mm.

According to the embodiment described above and the above-described embodiment, the following effects are obtained.

In other words, in the present embodiment, since the axial center portion 5 having the drive shaft support portion 5a is fixed to the first flange portion 11 and the second flange portion 12 in the internal space in the winding core portion 2A, The stress of the film 10 wound around the film 10 of the winding core portion 2A does not cause skew in the core portion 5 even when the winding core portion 2A has a large force.

As a result, according to the present embodiment, when the reel unit 1A that winds the film 10 by reciprocating winding is attached to the drive shaft of the drawing device, the mounting is not difficult, and the mounting can be smoothly performed. A film container 7 for winding a longer strip of the adhesive film 10 is provided.

Further, the present invention is not limited to the above-described embodiments, and various changes can be made. For example, in the above-described embodiment, the cross section of the surface of the first guiding portion 21 and the second guiding portion 22 is a linear structure (see FIG. 2), but the present invention is not limited thereto, and the first guiding is concerned. The cross section of the surface of the portion 21 and the second guiding portion 22 can also be a curved structure.

In this case, as long as the portions of the surfaces of the first guiding portion 21 and the second guiding portion 22 satisfy the relationship of θ < tan ^-1 (Y/X), the adhesive layer of the adhesive film 10 can be surely prevented. The overflow portion of 16 contacts the surfaces of the first guiding portion 21 and the second guiding portion 22.

[Examples]

Hereinafter, the present invention will be specifically described by way of examples and comparative examples, but the present invention is not limited by these examples.

[Next film formation]

As the adhesive film, an adhesive layer having a thickness of 25 μm was formed on a base film having a thickness of 38 μm by using polyethylene terephthalate (PET) having a width of 1 mm, and a thickness of 12 μm was provided on the adhesive layer. Peel the PET film.

Here, the composition of the adhesive contains 30 parts by weight of a phenoxy resin (manufactured by Nippon Steel Chemical Co., Ltd., YP-50), 20 parts by weight of a liquid epoxy resin (manufactured by Mitsubishi Chemical Corporation, JER828), and a rubber component (NAGASECHEMTEX). The company manufactured, SG80H), 10 parts by weight, a curing agent (manufactured by Asahi Kasei Corporation, NOVACURE 3941HP), 40 parts by weight, and a decane coupling agent (manufactured by MOMENTIVE PERFORMANCE MATERIALS, A-187), 1 part by weight.

This adhesive composition was dissolved in a solvent toluene, applied to a base film, and heated at an atmospheric temperature of 50 ° C for 10 minutes to evaporate the solvent to form an adhesive layer.

The minimum melt viscosity of this adhesive was 7.0 x 10 ³ Pa ‧ s.

Here, the lowest melt viscosity of the adhesive was measured using a rotary rheometer (manufactured by TA Instruments Co., Ltd.) at a temperature increase rate of 10 ° C /min and a measurement pressure of 5 g, and the value was measured using a measuring disc having a diameter of 8 mm.

(Example 1)

As the reel assembly, it is formed of a polystyrene tree, and the structure shown in Figs. 9A and 9B is used.

Here, the core shaft portion has a width of 50 mm, a diameter of 65 mm, a thickness of 5 mm, a diameter of the shaft core portion of 25 mm, a thickness of 5 mm, and a pair of flange portions having a diameter of 135 mm.

Further, a pair of guiding portions are provided so that the taper angle θ is 56°.

For this reel assembly, the following film is reciprocated by the method shown in FIGS. 7, 8A and 8B. Winding to wind 5000m.

The overflow distance X of the subsequent agent was measured by a microscope at a thickness of 25 μm at the film adjacent to the core portion of the winding core.

Therefore, in the present embodiment, the value of tan ^-1 (thickness Y of the base film / overflow distance X of the adhesive) was 56.66.

(Example 2)

The above-mentioned adhesive film was wound by reciprocating winding for 5000 m under the same conditions as in Example 1 except that the taper angle θ of the guiding portion was 60°.

Further, the overflow distance X of the adhesive was measured under the same conditions as in Example 1 to be 25 μm. Therefore, the value of tan ^-1 (thickness Y of the base film / overflow distance X of the adhesive) was 56.66.

(Comparative Example 1)

Except that the tapered guide portion was not provided to the pair of flange portions, the film was reciprocally wound by the same conditions as in the first embodiment using the reel assembly of the same configuration as that of the embodiment. The core shaft portion is wound by 5000 m.

In this case, the interval between the end portion of the film roll and the flange portion was set to 0.1 mm.

The overflow distance X of the adhesive was measured to be 25 μm under the same conditions as in Example 1. Therefore, the value of tan ^-1 (thickness Y of the base film / overflow distance X of the adhesive) was 56.66.

<evaluation>

The film storage body prepared by the first embodiment, the second embodiment, and the comparative example 1 was attached to the drive shaft of the film drawing device, and was pulled out under the conditions of an environmental test temperature of 30 ° C, a tensile force of 4000 mm/min, and a pull-out tension of 50 g. Confirm if there is any abnormality in this real. This result is shown in Table 1.

<evaluation result>

Although it is not shown in Table 1, the embodiment 1 in which the taper angle θ of the guide portion is 56° and the value of tan ^-1 (thickness Y of the base film / overflow distance X of the adhesive agent) is smaller than 56.66, there is no problem. The film is pulled out and the film is pulled out.

Further, in the case of the embodiment 2 in which the taper angle θ of the guide portion is 60° and the value of tan ^-1 (the thickness of the base film Y / the overflow distance X of the adhesive agent) is slightly larger than 56.66, although some are stuck But can pull out the film.

On the other hand, in the comparative example in which the flange portion was not provided with the tapered guide portion, the adhesive adhered to the flange portion, and the normal film pull-out could not be performed.

Based on the above results, the effects of the present invention can be confirmed.

1‧‧‧Roll assembly

2‧‧‧Rolling shaft part

3‧‧‧ Hole Department

11‧‧‧First flange

12‧‧‧Second flange

21‧‧‧First Guidance

22‧‧‧Second guidance

Claims (3)

A reel assembly comprising: a winding core portion formed in a cylindrical shape, capable of reciprocatingly winding an adhesive film on which an adhesive layer is disposed on a base film; and a pair of flange portions disposed on the winding core shaft Both ends of the portion; and a pair of guiding portions respectively guiding the adhesive film around the inner side of each of the flange portions; wherein the pair of guiding portions respectively face the flange from the winding core portion The outer edge portion of the portion is widened to have a tapered shape. The reel assembly according to claim 1, wherein, when the adhesive film is wound around the reel assembly, the distance from the adhesive film to the adhesive layer overflowing the rotation axis of the winding core portion is X, When the thickness of the base film of the adhesive film is Y, the inclination angle θ of the surface of the guide portion with respect to one of the rotational axis directions of the winding core portion is set to satisfy θ < tan ^-1 (Y/X). relationship. A film container comprising: a reel assembly, the reel assembly according to any one of claims 1 to 2; and a film roll reciprocatingly wound around a winding core portion of the reel assembly And a film on which the film of the both ends of each layer of the film roll is supported in a state in which the base film contacts the surface of the pair of guiding portions.