WO2013151012A1

WO2013151012A1 - Reel member

Info

Publication number: WO2013151012A1
Application number: PCT/JP2013/059948
Authority: WO
Inventors: 豊司山崎
Original assignee: デクセリアルズ株式会社
Priority date: 2012-04-06
Filing date: 2013-04-01
Publication date: 2013-10-10
Also published as: TW201348109A; CN104185600A; CN104185600B; JP2013216435A; JP5982158B2; TWI567016B; KR102028518B1; KR20140144265A

Abstract

Provided is a reel member with which adhesive film elongation is achieved, extrusions and blocking due to winding pressure concentration are inhibited, and winding deviation is inhibited. The reel member is provided with: a winding core (3); an annular elastic body (4) which is fitted to the outer peripheral surface of the winding core (3), and around which a tape-like adhesive film (2) is wound; and reel flanges (5) provided either side of the winding core (3). The elastic member (4) has a Shore A hardness which is greater than 30˚ but less than 90˚.

Description

Reel member

The present invention relates to a reel member around which a tape-like adhesive film is wound, and more particularly to a reel member in which an elastic body is mounted on a core and the adhesive film is wound around the elastic body.
This application claims priority on the basis of Japanese Patent Application No. 2012-87757 filed in Japan on April 6, 2012, and is incorporated herein by reference. Is done.

Conventionally, a mounting method has been used in which electronic components are mounted on a substrate using an adhesive film. For example, a COG (Chip on Glass) mounting method in which an IC chip as a liquid crystal driving circuit is mounted on a peripheral portion of a liquid crystal display panel (LCD panel) via a conductive adhesive film, or a tab serving as an interconnector in a solar battery cell The connection method which connects a line is mentioned.

The conductive adhesive film is obtained by forming an adhesive layer in which conductive particles are dispersed in a binder resin on a base film serving as a support. Such a conductive adhesive film 50 is used, for example, in the form of a reel wound body wound around a core 53 of a reel member 51 having a reel flange 52 as shown in FIG. Reference 1).

By the way, in order to replace the reel of the conductive adhesive film 50, a complicated operation such as stopping the one-end line and drawing the adhesive film around the transport roller is required, resulting in a large time loss in processes such as COG mounting. For this reason, various measures for simplifying the reel exchange work of the conductive adhesive film 50 and reducing the number of exchanges have been attempted. In particular, increasing the length of the conductive adhesive film 50 is effective in reducing the number of reel replacements.

However, when the conductive adhesive film 50 is wound around the core 53 of the reel member 51 in a long length, the winding pressure is accumulated in the vicinity of the core 53 and tightening occurs. Thereby, in the reel wound body, the binder resin protrudes from both sides of the base film, and there is a possibility that the adhesiveness and conduction reliability may be impaired during actual use. Moreover, there is a possibility that a phenomenon called so-called blocking that the protruding binder resin adheres to the reel flange 52 and the conductive adhesive film 50 cannot be pulled out normally may occur. This decrease tended to be particularly noticeable in conductive adhesive films where the viscosity of the binder resin was low at room temperature.

JP 2001-171033 A JP 2010-257983 A JP 2011-58007 A

For such problems, a method of suppressing the protrusion by providing the base film wider than the adhesive layer (see Patent Documents 2 and 3) and a tension for winding the adhesive film more than the core portion side. There has also been proposed a method (so-called taper tension) for preventing the winding pressure from concentrating on the core portion by weakening the outer peripheral side.

However, in the method of making the base film wider than the adhesive layer, in addition to the complicated manufacturing, it is possible to prevent the adhesive layer from flowing due to the winding pressure, even though it can suppress protrusion and blocking. However, there is still a possibility that the adhesiveness and conduction reliability may be impaired during actual use.

When taper tension is applied, winding displacement or loosening due to insufficient tension occurs on the outer peripheral side of the core as shown in FIG. 12, and as shown by a dotted line in FIG. Another problem arises, such as falling off from the wound body.

Accordingly, an object of the present invention is to provide a reel member that can increase the length of an adhesive film, suppress protrusion and blocking due to concentration of winding pressure, and prevent winding deviation and the like.

In order to solve the above-described problems, a reel member according to the present invention includes a winding core, an annular elastic body that is fitted to the outer peripheral surface of the winding core and on which a tape-like adhesive film is wound, and the winding described above. Reel flanges provided on both sides of the core, and the elastic body has a Shore A hardness of more than 30 ° and less than 90 °.

According to the present invention, the elastic body absorbs the winding pressure even when the adhesive film is wound and the winding body of the adhesive film is wound by being elastically deformable while the adhesive film is wound. Protruding and blocking can be prevented.

FIG. 1 is a side view showing a reel member to which the present invention is applied. FIG. 2 is a cross-sectional view showing the reel member in which the wound state of the adhesive film is broken. FIG. 3 is a side view showing a reel member to which the present invention is applied. FIG. 4 is a side view showing another reel member to which the present invention is applied. FIG. 5 is a side view showing another reel member to which the present invention is applied. FIG. 6 is a side view showing another reel member to which the present invention is applied. FIG. 7 is a side view showing another reel member to which the present invention is applied. FIG. 8 is a cross-sectional view showing the configuration of the adhesive film. FIG. 9 is a perspective view illustrating a method of measuring the protrusion in the embodiment. FIG. 10 is a side view illustrating a method for measuring the tightening load strength in the embodiment. FIG. 11 is a perspective view showing a conventional reel member. FIG. 12 is a side view showing a state in which winding deviation or loosening occurs in a conventional reel member. FIG. 13 is a side view showing a state in which winding of the conventional reel member or dropping of the adhesive film from the wound body has occurred.

Hereinafter, the reel member to which the present invention is applied will be described in detail with reference to the drawings. It should be noted that the present invention is not limited to the following embodiments, and various modifications can be made without departing from the scope of the present invention. Further, the drawings are schematic, and the ratio of each dimension may be different from the actual one. Specific dimensions should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

As shown in FIG. 1, a reel member 1 to which the present invention is applied includes a winding core 3, an elastic ring 4 that is fitted to the outer peripheral surface of the winding core 3 and on which a tape-like adhesive film 2 is wound, And reel flanges 5 provided on both sides of the core 3.

[Core / elastic ring]
The winding core 3 has a cylindrical shape, and is formed with an insertion port 3a through which a rotating device (not shown) that rotates the elastic ring 4 is inserted. Moreover, the core 3 has the width | variety substantially the same as the adhesive film 2 mentioned later, or the width more than the width | variety of the adhesive film 2, and the elastic ring 4 is fitted and integrated by the outer peripheral surface.

The elastic ring 4 is made of an elastic body such as rubber, has a cylindrical shape, and has substantially the same width as the adhesive film 2 or a width equal to or larger than the width of the adhesive film 2. The elastic ring 4 is integrated with the core 3 and the reel flange 5 by being fitted to the core 3. When the adhesive film 2 is wound and elastically deformable, the elastic ring 4 absorbs the winding pressure even when winding of the wound body of the adhesive film 2 occurs, Blocking can be prevented. Moreover, the reel member 1 can wind the adhesive film 2 with a large tension by providing the elastic ring 4.

The elastic ring 4 has a Shore A hardness of 30 ° to 90 °. If the hardness of the elastic ring 4 is greater than 90 ° in Shore A hardness, the reel member 1 becomes too hard and cannot be formed into a cylindrical shape depending on the ring diameter. Occasionally, the winding pressure cannot be absorbed and there is a risk of protrusion and blocking. Further, in the reel member 1, when the hardness of the elastic ring 4 is less than 30 ° in Shore A hardness, the elastic ring 4 is crushed by the winding pressure when the adhesive film 2 is wound, and the wound body of the adhesive film 2 is deformed. And tightening load strength is reduced.

Here, the tightening load strength refers to the maximum load applied when the wound adhesive film 2 is pulled out while the rotation of the core 3 and the elastic ring 4 is restricted. In general, in a conventional reel member in which a winding core is fixed to a reel flange, when the wound adhesive film is forcibly pulled out while the rotation of the winding core is restricted, the winding pressure is applied to the adhesive film winding body. Is generated, and the winding pressure is accumulated toward the inner circumferential side of the wound body. For this reason, the load applied to pulling out the adhesive film increases, but it suddenly decreases at a certain point and can be pulled out with a low load. As shown in FIG. 2, the winding state collapses and accumulates due to the reel flange 52 not being able to support the film winding body and curving left and right due to an increase in the winding pressure applied to the adhesive film winding body. This is because the winding pressure is released, and the adhesive film 50 is not properly superimposed, and the winding pressure can no longer be accumulated and supported normally. Thus, in the adhesive film winding body in which the winding pressure is accumulated until the winding state is broken, the binder resin protrudes or blocks, the adhesive film falls off, and the adhesive film 2 cannot be normally unwound.

The tightening load strength of the reel member means the maximum load strength that can maintain a normal winding state when a load due to tightening is applied to the wound body of the adhesive film. When a load is applied exceeding the load strength, the winding state breaks down, and it becomes possible to pull out at a low load. That is, the winding tightening load strength shows the resistance to maintain the winding state and support the winding pressure with respect to the winding tightening of the wound body of the adhesive film.

And, in the elastic ring 4 having a Shore A hardness of more than 90 °, the winding pressure due to the tightening cannot be absorbed, and the winding state is broken when the winding pressure is applied to the wound body. Further, in the elastic ring 4 having a Shore A hardness of less than 30 °, it is easily deformed with respect to the tightening, the winding state cannot be maintained, the winding collapse occurs, and the tightening load strength is reduced. Therefore, the elastic ring 4 preferably has a Shore A hardness of 30 ° to 90 °.

[Shore A hardness is 80 ° or more]
Further, the elastic ring 4 has a Shore A hardness of 80 ° or more, so that the maximum load applied when the wound adhesive film 2 is pulled out in a state where the rotation of the core 3 and the elastic ring 4 is restricted. That is, the tightening load strength can be 5 N or more.

The elastic ring 4 is formed using rubber such as buty rubber, nitrile rubber, NE, or urethane. Moreover, the winding quality of the adhesive film 2 improves by using a material with high impact resilience. Examples of the material of the elastic ring 4 include urethane, NR, butadiene rubber, isoprene rubber, and silicone rubber.

Note that the elastic ring 4 cannot obtain a desired hardness when a material with volume shrinkage with respect to the winding pressure such as a foam is used, and easily deforms due to the tightness of the adhesive film 2. The winding state cannot be maintained. Therefore, the elastic ring 4 is preferably made of a material having a desired hardness such as rubber. For example, foamed elastic materials such as olefin-based foams and foamed urethane have an elastic modulus (Young's modulus) of 0.005 to 0.06 GPa, whereas rubber systems have 0.01 to 0.1 GPa. It is numerically superior.

The elastic ring 4 can be appropriately adjusted in thickness according to the rubber hardness and the length of the wound adhesive film 2. For example, the length of the wound adhesive film 2 is 200 to 500 m. In some cases, the thickness is preferably in the range of 0.5 to 10 mm.

[Reel flange]
Reel flanges 5 are provided on both sides of the core 3 and the elastic ring 4. The reel flange 5 supports the adhesive film 2 wound around the elastic ring 4, and is formed in a disk shape using a transparent plastic material, for example. Further, the reel flange 5 may be subjected to electrostatic treatment on the surface in contact with the adhesive film 2. Examples of the method for applying electrostatic treatment include a method of applying a compound such as polythiophene.

[Evacuation space]
The reel flange 5 is provided with a retreat space 10 in which a part of the elastic ring 4 is retreated when the elastic ring 4 is compressed and deformed by the accumulated winding pressure. The elastic ring 4 is formed of a material such as rubber, and when compressed by applying a winding pressure, the elastic ring 4 is deformed without contracting to absorb the winding pressure. The retreat space 10 is a space in which a part of the deformed elastic ring 4 is retreated, and is recessed on the inner peripheral surface of the reel flange 5, for example, as shown in FIG.

The retreat space 10 is provided on the inner peripheral surface of the reel flange 5 at a position facing the side surface of the elastic ring 4. For example, as shown in FIG. 3, the retreat space 10 is formed with an annular concave groove 11 having the same shape at a position facing the side surface of the elastic ring 4 of the pair of left and

right reel flanges

5 a and 5 b. The retreat space 10 has a depth A of the concave groove 11a on the one reel flange 5a side, a depth C of the concave groove 11b on the other reel flange 5b side, and a

concave groove

11a, 11b on both

reel flanges

5a, 5b. The width D is the same as the thickness of the elastic ring 4.

At this time, in the retracting space 10, if the width of the elastic ring 4 is B, the sectional area of the retracting space 10 (A × D + C × D) / the sectional area of the elastic ring 4 (B × D) is 3.5 to 20%. It is preferable. If the cross-sectional area ratio between the retracting space 10 and the elastic ring 4 is less than 3.5%, that is, if the retracting space 10 is too narrow, the elastic ring 4 is compressed and retracted according to the winding pressure when the adhesive film 2 is wound. Can not absorb the winding pressure. On the other hand, if the cross-sectional area ratio between the retracting space 10 and the elastic ring 4 is larger than 20%, the compression deformation becomes unstable, and the function as an elastic body is lowered, and the adhesive film 2 is collapsed.

Further, it is preferable that the retreat space 10 has a size that supports the elastic ring 4 in contact with the elastic ring 4 when the elastic ring 4 is deformed to the maximum extent. Thereby, the evacuation space 10 supports the elastic ring 4 that has been compressed and deformed, and can stably absorb the winding pressure.

[Other retreat space: Rib 1]
In addition to forming the concave groove 11 on the inner peripheral surface of the reel flange 5, the retreat space 10 is provided with a plurality of ridge ribs 12 radially on the inner peripheral surface of the reel flange 5 as shown in FIG. 4. In addition, a clearance may be provided between the convex rib 12 and the elastic ring 4 to adjust the distance between the elastic ring 4 and the reel flange 5 and the distance between the elastic ring 4 and the convex rib 12. Good.

In the case shown in FIG. 4, by providing a clearance between the elastic ring 4 and the reel flange 5 and the convex rib 12, the retreat space 10 is provided between the elastic ring 4 and the convex rib 12 and between the elastic ring 4 and the reel. It is formed between the flange 5.

Further, as shown in FIG. 5, the retreat space 10 may be formed by adjusting the height of the convex rib 12 by bringing the convex rib 12 and the elastic ring 4 into contact with each other. In this case, the retreat space 10 is between the elastic ring 4 and the reel flange 5.

[Other evacuation spaces: Ribs]
In addition to forming the concave groove 11 on the inner peripheral surface of the reel flange 5, the retreat space 10 is provided with a plurality of ridge ribs 12 radially on the inner peripheral surface of the reel flange 5 as shown in FIG. 6. Moreover, you may form by making the edge part of the inner peripheral side of the said protruding rib 12 into the boundary position with the position which opposes the elastic ring 4. FIG.

That is, the reel flange 5 is not provided with the protruding rib 12 at a position facing the elastic ring 4 but is provided facing the adhesive film 2 wound around the elastic ring 4. Thereby, the reel flange 5 can support the winding body side surface of the adhesive film 2 by the protruding ribs 12, reduce the contact area with the binder resin, and suppress blocking.

Also in this case, the retreat space 10 has the height of the protruding rib rib 12a on the one reel flange 5a side as A, the height of the protruding rib rib 12b on the other reel flange 5b side as C, and the thickness of the elastic ring 4 When the height is D and the width of the elastic ring 4 is B, the sectional area of the retreat space 10 (A × D + C × D) / the cross section of the elastic ring 4 (B × D) is preferably 3.5 to 20%. .

[Other retreat space: annular rib]
Further, the retreat space 10 may be formed by projecting an annular rib 13 on the inner peripheral surface of the reel flange 5 as shown in FIG. The annular rib 13 serves as a retreat space for the elastic ring 4 whose inside is compressed and deformed, is formed concentrically with the reel flange 5, and abuts on the outer peripheral side surface of the elastic ring 4.

[Adhesive film]
Here, the adhesive film 2 wound around the reel member 1 will be described. As shown in FIG. 8, the adhesive film 2 includes an adhesive layer 20 and a base film 21 serving as a support that supports the adhesive layer 20.

The adhesive layer 20 can be an anisotropic conductive film (ACF: Anisotropic Conductive Film) containing conductive particles 22 in a binder (insulating adhesive composition) 20a, but is not limited thereto. An insulating adhesive film (NCF: Non-Conductive Film) that does not contain the conductive particles 22 in 20a may be used.

As the binder 20a of the adhesive film 2, for example, a normal binder containing a film forming resin, a thermosetting resin, a latent curing agent, a silane coupling agent, or the like can be used. For the adhesive film 2, an anisotropic conductive composition in which the conductive particles 22 are dispersed in the binder 20 a or an insulating adhesive composition that does not contain the conductive particles 22 in the binder 20 a is applied on the base film 21. Thus, the film is formed on the base film 21.

The base film 21 supports the binder 20a in the form of a film. For example, PET (Poly Ethylene Terephthalate), OPP (Oriented Polypropylene), PMP (Poly-4-methlpentene-1), PTFE (Polytetrafluoroethylene), etc. are made of silicone. It is formed by applying a release agent such as.

The film-forming resin contained in the binder 20a is preferably a resin having an average molecular weight of about 10,000 to 80,000. Examples of the film forming resin include various resins such as an epoxy resin, a modified epoxy resin, a urethane resin, and a phenoxy resin. Among these, phenoxy resin is particularly preferable from the viewpoint of film formation state, connection reliability, and the like.

The thermosetting resin is not particularly limited as long as it has fluidity at room temperature, and examples thereof include commercially available epoxy resins and acrylic resins.

The epoxy resin is not particularly limited. For example, naphthalene type epoxy resin, biphenyl type epoxy resin, phenol novolac type epoxy resin, bisphenol type epoxy resin, stilbene type epoxy resin, triphenolmethane type epoxy resin, phenol aralkyl type epoxy resin. Naphthol type epoxy resin, dicyclopentadiene type epoxy resin, triphenylmethane type epoxy resin and the like. These may be used alone or in combination of two or more.

There is no restriction | limiting in particular as an acrylic resin, According to the objective, an acrylic compound, liquid acrylate, etc. can be selected suitably. For example, methyl acrylate, ethyl acrylate, isopropyl acrylate, isobutyl acrylate, epoxy acrylate, ethylene glycol diacrylate, diethylene glycol diacrylate, trimethylolpropane triacrylate, dimethylol tricyclodecane diacrylate, tetramethylene glycol tetraacrylate, 2-hydroxy- 1,3-diacryloxypropane, 2,2-bis [4- (acryloxymethoxy) phenyl] propane, 2,2-bis [4- (acryloxyethoxy) phenyl] propane, dicyclopentenyl acrylate, tricyclo Examples include decanyl acrylate, tris (acryloxyethyl) isocyanurate, urethane acrylate, and epoxy acrylate. In addition, what made acrylate the methacrylate can also be used. These may be used individually by 1 type and may use 2 or more types together.

The latent curing agent is not particularly limited, and examples thereof include various curing agents such as a heat curing type and a UV curing type. The latent curing agent does not normally react, but is activated by various triggers selected according to applications such as heat, light, and pressure, and starts the reaction. The activation method of the thermally activated latent curing agent includes a method of generating active species (cations and anions) by a dissociation reaction by heating, and the like. There are a method of dissolving and dissolving and starting a curing reaction, a method of starting a curing reaction by eluting a molecular sieve encapsulated type curing agent at a high temperature, an elution and curing method using microcapsules, and the like. Thermally active latent curing agents include imidazole series, hydrazide series, boron trifluoride-amine complex, sulfonium salt, amine imide, polyamine salt, dicyandiamide, and modified products thereof. The above mixture may be sufficient. Among these, a microcapsule type imidazole-based latent curing agent is preferable.

The silane coupling agent is not particularly limited, and examples thereof include an epoxy type, an amino type, a mercapto sulfide type, and a ureido type. By adding the silane coupling agent, the adhesion at the interface between the organic material and the inorganic material is improved.

Examples of the conductive particles 22 include any known conductive particles used in anisotropic conductive films. Examples of the conductive particles 22 include particles of various metals and metal alloys such as nickel, iron, copper, aluminum, tin, lead, chromium, cobalt, silver, gold, metal oxide, carbon, graphite, glass, ceramic, Examples thereof include those in which the surface of particles such as plastic is coated with metal, or those in which the surface of these particles is further coated with an insulating thin film. In the case where the surface of the resin particle is coated with metal, examples of the resin particle include an epoxy resin, a phenol resin, an acrylic resin, an acrylonitrile / styrene (AS) resin, a benzoguanamine resin, a divinylbenzene resin, a styrene resin, and the like. Can be mentioned.

In the above description, the adhesive film 2 in which the adhesive film 2 made of ACF or NCF is laminated on the base film 21 is used. However, the present invention is not limited to this example. For example, the film laminate may be an anisotropic conductive film having two or more layers in which ACF and NCF are laminated.

Further, the adhesive film 2 may have a configuration in which a cover film is provided on the surface opposite to the surface on which the base film 21 of the adhesive film 2 is laminated. For example, it is good also as an adhesive film with copper foil for electrically connecting the electrodes of a plurality of photovoltaic cells.

Next, examples of the present invention will be described. In this example, reel members were prepared in which the type of elastic ring 4 to be fitted to the core 3 was changed, and an adhesive film having a length of 300 m was wound around each reel member. Then, the presence or absence of blocking of the binder resin when the adhesive film was unwound while the winding core and the elastic ring rotated as usual from each reel member and the presence or absence of blocking were confirmed. Further, the tightening load strength when the adhesive film was pulled out in a state where the rotation of the winding core and the elastic ring of each reel member was regulated and the presence or absence of protrusion after the measurement was evaluated.

As shown in FIG. 3, the reel member used in each example and comparative example is provided with a retracting space 10 for the elastic ring 4 formed of a concave groove 11 on the inner peripheral surface of the reel flange 5. Moreover, Sony Chemical & Information Device Co., Ltd. ACF was used for the adhesive film wound around each reel member. The thickness of the adhesive layer of the adhesive film is 10 to 25 μm, and the minimum melt viscosity of the binder is 3.0 × 10 ⁻⁴ Pa · S.

In Example 1, butyl rubber having a Shore A hardness of 40 ° was used as an elastic ring material. The thickness D of the elastic ring is 2 mm, and the ratio of the cross-sectional area between the retreat space 10 and the elastic ring 4 is: the cross-sectional area of the retreat space 10 (A × D + C × D) / the cross-sectional area of the elastic ring 4 (B × D) 5%. Moreover, the tension | tensile_strength at the time of winding of an adhesive film is 0.75N.

In Example 2, the same conditions as in Example 1 were used except that butyl rubber having a Shore A hardness of 80 ° was used as the material of the elastic ring.

In Example 3, the conditions were the same as in Example 1 except that nitrile rubber with a Shore A hardness of 40 ° was used as the material for the elastic ring.

In Example 4, the conditions were the same as in Example 1 except that nitrile rubber with a Shore A hardness of 80 ° was used as the material for the elastic ring.

In Example 5, the conditions were the same as in Example 1 except that NE with a Shore A hardness of 40 ° was used as the elastic ring material.

In Example 6, the conditions were the same as in Example 1 except that NE with a Shore A hardness of 80 ° was used as the material for the elastic ring.

In Example 7, the conditions were the same as in Example 1 except that urethane having a Shore A hardness of 40 ° was used as the material of the elastic ring.

In Example 7, the conditions were the same as in Example 1 except that urethane with a Shore A hardness of 80 ° was used as the material for the elastic ring.

In Comparative Example 1, the conditions were the same as in Example 1 except that the adhesive film was wound using a conventional reel member in which the elastic ring 4 was not provided.

In Comparative Example 2, the same conditions as in Example 1 were used except that butyl rubber having a Shore A hardness of 30 ° was used as the material of the elastic ring.

In Comparative Example 3, the conditions were the same as in Example 1 except that butyl rubber having a Shore A hardness of 90 ° was used as the material of the elastic ring.

As shown in FIG. 9, each reel member is set on a measurement jig for the presence or absence of the binder resin protruding or blocking when the adhesive film is unwound from the reel member according to the example and the comparative example as usual. The adhesive film is unwound and left at room temperature for 24 hours with a 50 g weight W suspended from the tip. Then, the side surface of the reel flange was observed with an optical microscope, and the presence or absence of protrusion was confirmed. Subsequently, the adhesive film was unwound as usual and checked for the presence or absence of blocking. A case where no protrusion was observed was indicated by ◎, a case where protrusion was observed but no problem in practical use was indicated by ◯, and a case where blocking occurred and the wire was not normally unwound was indicated by ×.

In addition, as shown in FIG. 10, the measurement of the tightening load strength according to the example and the comparative example is performed by setting each reel member on a measuring jig and restricting the rotation of the winding core and the elastic ring. The adhesive film was pulled out with G, and the load peak was measured. Further, the side surface of the reel flange was observed with an optical microscope, and the presence or absence of protrusion was confirmed. The measurement results are shown in Table 1.

As shown in Table 1, in the reel member according to each example, blocking was not generated in such a degree that the protrusion was found to be practically satisfactory. Further, the winding tightening load strength was as good as 1 N or more, and no unusable protrusion was observed even after the adhesive film was pulled out.

Also, among the examples, in Examples 2, 4, 6, and 8 in which the Shore A hardness of the elastic ring was 80 °, the winding tightening load strength was 5 N or more, which was a favorable result.

On the other hand, in Comparative Example 1 in which no elastic ring was provided, when the adhesive film was unwound as usual, blocking due to protrusion occurred, making it difficult to use. Further, in Comparative Example 2 using an elastic ring with a Shore A hardness of 30 °, the winding tightening load strength when the adhesive film was pulled out was as low as 0.5 N, and the protrusion was pulled out after the drawing, making it difficult to use. Furthermore, in Comparative Example 3 using an elastic ring with a Shore A hardness of 90 °, when the adhesive film was unwound as usual, blocking due to protrusion occurred, making it practically difficult to use.

From this, it can be seen that the elastic ring material preferably has a Shore A hardness of more than 30 ° and less than 90 °.

Further, as Example 2, in the reel member provided with the retraction space 10 having the same shape as that of Example 1, the cross-sectional area ratio between the retraction space 10 and the elastic ring 4: cross-sectional area of the retraction space 10 (A × D + C × D) / A reel member having an elastic ring 4 cross-sectional area (B × D) of 2% was prepared. Then, an adhesive film having a length of 300 m was wound around the reel member, and the presence or absence of blocking of the binder resin when the adhesive film was unwound from each reel member as usual was checked. Further, the tightening load strength when the adhesive film was pulled out in a state in which the rotation of each reel member was regulated was measured and the presence or absence of protrusion after the measurement was evaluated.

In Example 9, butyl rubber having a Shore A hardness of 40 ° was used as an elastic ring material. The thickness D of the elastic ring is 2 mm, and the tension when the adhesive film is wound is 0.75N.

In Example 10, butyl rubber having a Shore A hardness of 80 ° was used as an elastic ring material. The thickness D of the elastic ring is 2 mm, and the tension when the adhesive film is wound is 0.75N.

When the adhesive film is unwound from each reel member as usual, the binder resin protrudes, observes the presence or absence of blocking, and the tightening load strength when the adhesive film is pulled out while restricting the rotation of each reel member The measurement and the observation and evaluation method of the protrusion when the adhesive film is pulled out are the same as those in Example 1. The measurement results are shown in Table 2.

As shown in Table 2, in Example 9 and Example 10, blocking was not generated to the extent that both of the protrusions were found to have no practical problem. Further, the winding tightening load strength was as good as 1 N or more, and no unusable protrusion was observed even after the adhesive film was pulled out.

Also, as Example 3, a reel member in which no evacuation space 10 was provided was prepared. That is, in the reel member according to Example 3, the ratio of the cross-sectional area between the retracting space 10 and the elastic ring 4 is 0% of the cross-sectional area of the retracting space 10 (A × D + C × D) / the cross-sectional area of the elastic ring 4 (B × D). It was. Then, an adhesive film having a length of 300 m was wound around the reel member, and the presence or absence of blocking of the binder resin when the adhesive film was unwound from each reel member as usual was checked. Further, the tightening load strength when the adhesive film was pulled out in a state in which the rotation of each reel member was regulated was measured and the presence or absence of protrusion after the measurement was evaluated.

In Comparative Example 4, butyl rubber having a Shore A hardness of 40 ° was used as an elastic ring material. The thickness D of the elastic ring is 2 mm, and the tension when the adhesive film is wound is 0.75N.

In Comparative Example 5, butyl rubber having a Shore A hardness of 80 ° was used as an elastic ring material. The thickness D of the elastic ring is 2 mm, and the tension when the adhesive film is wound is 0.75N.

When the adhesive film is unwound from each reel member as usual, the binder resin protrudes, observes the presence or absence of blocking, and the tightening load strength when the adhesive film is pulled out while restricting the rotation of each reel member The measurement and the observation and evaluation method of the protrusion when the adhesive film is pulled out are the same as those in Example 1. Table 3 shows the measurement results.

As shown in Table 3, in both Comparative Example 4 and Comparative Example 5, when the adhesive film was unwound as usual, the protrusion occurred, making practical use difficult. This is because the retracting space is not provided when the elastic ring is compressed and deformed, so the elastic ring cannot be sufficiently compressed and the winding pressure generated in the wound body of the adhesive film cannot be absorbed. This is because.

Further, as Example 4, a reel member provided with an elastic ring made of urethane rubber was prepared. In the reel member according to Example 4, the ratio of the sectional area between the retracting space 10 and the elastic ring 4: the sectional area of the retracting space 10 (A × D + C × D) / the sectional area of the elastic ring 4 (B × D) is 5%. . Then, an adhesive film having a length of 300 m was wound around the reel member with a tension of 0.75 N, and the presence or absence of blocking of the binder resin when the adhesive film was unwound from each reel member as usual was checked. Further, the tightening load strength when the adhesive film was pulled out in a state in which the rotation of each reel member was regulated was measured and the presence or absence of protrusion after the measurement was evaluated.

In Example 11, an elastic ring having a Shore A hardness of 40 ° and a thickness of 1 mm was used.

In Example 12, an elastic ring having a Shore A hardness of 40 ° and a thickness of 2 mm was used.

In Example 13, an elastic ring having a Shore A hardness of 40 ° and a thickness of 5 mm was used.

In Example 14, an elastic ring having a Shore A hardness of 80 ° and a thickness of 1 mm was used.

In Example 15, an elastic ring having a Shore A hardness of 80 ° and a thickness of 2 mm was used.

In Example 16, an elastic ring having a Shore A hardness of 80 ° and a thickness of 5 mm was used.

When the adhesive film is unwound from each reel member as usual, the binder resin protrudes, observes the presence or absence of blocking, and the tightening load strength when the adhesive film is pulled out while restricting the rotation of each reel member The measurement and the observation and evaluation method of the protrusion when the adhesive film is pulled out are the same as those in Example 1. Table 4 shows the measurement results.

As shown in Table 4, any of Examples 11 to 16 has no practical problem. In Examples 11 to 13 where the rubber hardness was 40 °, no protrusion was observed when the adhesive film was normally unwound, but the tightening load strength when the adhesive film was pulled out tended to decrease as the thickness increased. There is. On the other hand, in Examples 14 to 16 where the rubber hardness was 80 °, when the adhesive film was unwound as usual in Example 14 having a thickness of 1 mm, a slight protrusion was observed. The tightening load strength when pulling out the film tends to increase.

Thus, the protruding evaluation when unwinding the adhesive film while the winding core and the elastic ring rotate as usual, and the tightening load strength when pulling out the adhesive film in a state where the rotation of the winding core and the elastic ring is regulated May conflict with the rubber hardness and thickness of the elastic ring.

1 reel member, 2 adhesive film, 3 core, 4 elastic ring, 5 reel flange, 10 retreat space, 11 concave groove, 12 convex rib, 13 annular rib, 20 adhesive layer, 21 base film, 22 conductive particles

Claims

Winding core,
An annular elastic body fitted to the outer peripheral surface of the core and wound with a tape-like adhesive film;
Reel reels provided on both sides of the core,
The elastic member is a reel member having a Shore A hardness of more than 30 ° and less than 90 °.
The reel member according to claim 1, wherein the elastic body has a Shore A hardness of 80 ° or more.
3. The reel member according to claim 2, wherein a maximum load applied when the wound adhesive film is pulled out in a state where rotation of the winding core and the elastic body is restricted is 5 N or more.
2. The reel member according to claim 1, wherein the reel flange is provided with a retreat space in which a part of the elastic body escapes when the elastic body is compressed and deformed.
The reel according to claim 4, wherein the retracting space is formed on the inner surface of the reel flange so as to face the elastic body, and a cross-sectional area ratio is 3.5 to 20% with respect to a cross-sectional area of the elastic body. Element.
6. The reel member according to claim 5, wherein the retracting space is sized to come into contact with the elastic body when the elastic body is deformed to the maximum extent.
The reel member according to claim 4, wherein the retreat space is formed with an annular groove on the inner surface of the reel flange at a position facing the elastic body.
The retreat space is formed by providing a plurality of ribs radially on the inner surface of the reel flange and setting the inner peripheral side end of the rib as a boundary position with the position facing the elastic body. The reel member according to claim 4.
5. The reel member according to claim 4, wherein the retreat space is formed by providing an annular rib concentric with the reel flange at a position facing the elastic body on the inner surface of the reel flange.
The reel member according to claim 1, wherein the adhesive film is wound.