KR20140144265A - Reel member - Google Patents

Abstract

The present invention provides a reel member capable of lengthening an adhesive film and preventing a release and blocking due to the concentration of the pressure of the pressure, and also preventing winding displacement and the like. The reel member is constituted by a winding core 3, an annular elastic body 4 fitted to the outer peripheral surface of the winding core 3 and wound with a tape-shaped adhesive film 2, And a reel flange 5, and the elastic body 4 has a Shore A hardness of more than 30 degrees and less than 90 degrees.

Description

REEL MEMBER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reel member in which a tape-shaped adhesive film is wound, and more particularly to a reel member in which an elastic body is mounted on a winding core and an adhesive film is wound on the elastic body.

The present application claims priority based on Japanese Patent Application No. 2012-87757, filed on April 6, 2012, which is incorporated herein by reference.

BACKGROUND ART [0002] Conventionally, a mounting method in which an electronic component is mounted by using an adhesive film on a substrate is used. For example, a COG (Chip on Glass) mounting method in which an IC chip as a liquid crystal driving circuit is mounted through a conductive adhesive film on the periphery of a liquid crystal display panel (LCD panel) And a connection method for connecting a tap line to be connected.

The conductive adhesive film is formed on a base film serving as a support, in which an adhesive layer in which conductive particles are dispersed in a binder resin. 11, the conductive adhesive film 50 is used in the form of a reel end member wound around a winding core 53 of a reel member 51 having a reel flange 52 See, for example, Patent Document 1).

However, in order to change the reel of the conductive adhesive film 50, a troublesome operation is required, such as stopping the line once and pulling the adhesive film on the conveying rollers, which leads to a large time loss in a process such as COG packaging have. As a result, various measures have been attempted to simplify the reel changing operation of the conductive adhesive film 50 and to reduce the number of times of replacement. In particular, the elongation of the conductive adhesive film 50 is effective for reducing the number of reel exchanges.

However, when the conductive adhesive film 50 is fully wound on the winding core 53 of the reel member 51, the winding pressure is accumulated in the vicinity of the winding core 53 to cause winding-up tightness. Thereby, there is a risk that the binder resin comes out from both sides of the base film and deteriorates the adhesive property and the conduction reliability at the time of practical use. In addition, there is a possibility that a phenomenon called so-called blocking, in which the binder resin that is emptied is adhered to the reel flange 52, and the conductive adhesive film 50 can not be drawn normally can occur. This decrease tended to be conspicuous especially in a conductive adhesive film with low viscosity of the binder resin at room temperature.

Japanese Patent Application Laid-Open No. 2001-171033 Japanese Patent Application Laid-Open No. 2010-257983 Japanese Patent Application Laid-Open No. 2011-58007

In view of such a problem, a method of suppressing the release of the base film by providing the base film at a wider width than the adhesive layer (see Patent Documents 2 and 3), and a method in which the tension for winding the adhesive film is weaker on the outer peripheral side than on the take- (So-called taper tension) for preventing the winding pressure from concentrating on the portion is also proposed.

However, in the method of making the base film wider than the adhesive layer, it is impossible to prevent the adhesive layer from flowing due to the pressurization even though the production is troublesome and besides it can be suppressed from coming out or blocking, There is still a concern that the adhesion and the reliability of conduction may be impaired.

As shown in Fig. 13, when the taper tension is applied, winding displacement or winding relaxation due to lack of tension occurs on the outer peripheral side of the winding core as shown in Fig. 12, Or the like is likely to fall out from the recommended body of the apparatus.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a reel member which is capable of preventing elongation of the adhesive film and suppressing the release and blocking of the adhesive film due to the concentration of the pressure roll,

In order to solve the above-described problems, a reel unit according to the present invention comprises: a winding core; an annular elastic body fitted to the outer peripheral surface of the winding core and wound with a tape-shaped adhesive film; And a flange, wherein the elastic body has a Shore A hardness of more than 30 degrees and less than 90 degrees.

According to the present invention, the elastic body can be elastically deformed as well as being wound with the adhesive film, so that it is possible to absorb the winding pressure even when the winding body of the adhesive film is pulled tight, thereby preventing the elastic film from coming out or blocking.

1 is a side view showing a reel member to which the present invention is applied.
2 is a sectional view showing a reel member in which the winding state of the adhesive film is collapsed.
3 is a side view showing a reel member to which the present invention is applied.
4 is a side view showing another reel member to which the present invention is applied.
5 is a side view showing another reel member to which the present invention is applied.
6 is a side view showing another reel member to which the present invention is applied.
7 is a side view showing another reel member to which the present invention is applied.
8 is a cross-sectional view showing the structure of the adhesive film.
Fig. 9 is a perspective view showing a measuring method of the emergence in the embodiment. Fig.
10 is a side view showing a method of measuring the winding tightening load strength in the embodiment.
11 is a perspective view showing a conventional reel member.
Fig. 12 is a side view showing a state in which winding displacement or winding relaxation occurs in a conventional reel member. Fig.
Fig. 13 is a side view showing a state in which a conventional reel member is subjected to winding-up tightening or removal of an adhesive film from a recommended body.

Hereinafter, a reel unit to which the present invention is applied will be described in detail with reference to the drawings. It is needless to say that the present invention is not limited to the following embodiments, and that various changes can be made without departing from the gist of the present invention. Also, the drawings are schematic, and the ratios of the dimensions and the like may be different from those of the real world. The specific dimensions and the like should be judged based on the following description. Needless to say, the drawings also include portions having different dimensional relationships or ratios with each other.

1, the reel unit 1 to which the present invention is applied includes a winding core 3, an elastic ring (not shown) which is fitted on the outer peripheral surface of the winding core 3 and in which a tape- 4 and a reel flange 5 provided on both sides of the winding core 3. As shown in Fig.

[Winding core / elastic ring]

The winding core 3 has a cylindrical shape and an insertion through hole 3a through which a rotating device (not shown) for rotating the elastic ring 4 is inserted is formed at the center. The winding core 3 has a width substantially equal to the width of the adhesive film 2 or a width of the adhesive film 2 to be described later and the elastic ring 4 is integrally formed on the outer peripheral surface thereof.

The elastic ring 4 includes an elastic body such as rubber and has a cylindrical shape and has a width approximately equal to that of the adhesive film 2 or greater than the width of the adhesive film 2. The elastic ring 4 is integrated with the winding core 3 and the reel flange 5 by being engaged with the winding core 3. The elastic ring 4 is wound and can be elastically deformed so that even when the winding of the adhesive film 2 is wound, the elastic ring 4 absorbs the winding pressure and prevents the elastic film 4 from coming out or blocking can do. In addition, the elastic member 4 is provided on the reel unit 1 so that the adhesive film 2 can be wound with a large tension.

The elastic ring 4 has a hardness of 30 to 90 degrees in Shore A hardness. When the hardness of the elastic ring 4 is greater than 90 deg. By Shore A hardness, the reel member 1 becomes too rigid and can not be formed into a cylindrical shape depending on the ring diameter. Even when the elastic ring 4 can be molded, 2) can not be absorbed at all, so that there is a risk of coming out or blocking. When the hardness of the elastic ring 4 is less than 30 deg. By the Shore A hardness, the elastic ring 4 is crushed by the winding pressure when the adhesive film 2 is wound and the adhesive film 2 Is likely to be deformed, and the winding-out tightening load strength is lowered.

Here, the winding-out tightening load strength refers to a maximum load applied when the winding of the winding-off adhesive film 2 is taken out while the rotation of the winding core 3 and the elastic ring 4 is restricted. Generally, in the conventional reel member in which the winding core is fixed to the reel flange, when the wound adhesive film is forcibly pulled out while the rotation of the winding core is restricted, The curling pressure is accumulated toward the inner circumference side of the body. As a result, the load applied to the drawing of the adhesive film increases, but a certain point is sharply reduced to the boundary, and the drawing can be performed at a low load. This is because, as shown in Fig. 2, the reel flange 52 can not fully support the film supporting body due to an increase in the winding pressure applied to the adhesive film, and the winding state is collapsed and accumulated The pressure is released and the adhesive film 50 is not normally overlapped and the pressure can not be normally accumulated and accumulated. In this case, the binder resin is prevented from coming out, blocking, and falling off of the adhesive film, and the adhesive film 2 can not normally be wound in the adhesive film body in which the pressure is accumulated until the winding state collapses.

The winding tightening load strength of the reel member means the maximum load strength capable of maintaining a normal winding state when a load due to winding and fastening is applied to a recommended body of the adhesive film, The winding state is collapsed, and drawing out under a low load becomes possible. That is, the winding-out tightening load strength indicates the resistance against which the winding pressure can be held by maintaining the winding state with respect to the winding-up of the recommended body of the adhesive film.

In the elastic ring 4 having a Shore A hardness of greater than 90 degrees, it is impossible to absorb the winding pressure due to the winding-up tightening, and the winding state is caught by the recommended body so that the winding state is collapsed. In addition, in the elastic ring 4 having a Shore A hardness of less than 30, the elastic ring 4 is easily deformed against winding and tightening, and the winding state can not be maintained, so that the winding collapse occurs and the winding tightening load strength is lowered. For this reason, the elastic ring 4 preferably has a hardness of 30 to 90 degrees in Shore A hardness.

[Shore A hardness over 80 °]

The elastic ring 4 has a Shore A hardness of 80 DEG or more so that the rotation of the winding core 3 and the elastic ring 4 is restricted so that the maximum The load, that is, the winding tightening load strength may be 5N or more.

The elastic ring 4 is formed by using rubber such as butyl rubber, nitrile rubber, NE, urethane or the like. Further, by using a material having high rebound resilience, the quality of winding of the adhesive film 2 is improved. Examples of the material of the elastic ring 4 include urethane, NR, butadiene rubber, isoprene rubber, and silicone rubber.

In the case where a material accompanied by volumetric shrinkage is used for the same pressing pressure as the foam, the elastic ring 4 can not obtain a desired hardness and is easily deformed to the winding direction of the adhesive film 2 to maintain the winding state I can not. Therefore, it is preferable that the elastic ring 4 be made of a material having desired hardness such as rubber. For example, elastomeric materials such as olefinic foams and foamed urethane foam are numerically superior in elasticity (Young's modulus) from 0.005 to 0.06 GPa, and in rubber, from 0.01 to 0.1 GPa.

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

[Reel Flange]

On both sides of the winding core 3 and the elastic ring 4, a reel flange 5 is provided. The reel flange 5 supports the adhesive film 2 wound on the elastic ring 4 and is formed in a disc shape using, for example, a transparent plastic material. The reel flange 5 may be subjected to electrostatic processing on the surface in contact with the adhesive film 2. [ As a method of performing the electrostatic treatment, for example, a method of applying a compound such as polythiophene can be mentioned.

[Retirement Space]

A retraction space 10 in which a part of the elastic ring 4 is retracted is formed in the reel flange 5 when the elastic ring 4 is compressed and deformed by the accumulated winding pressure. The elastic ring (4) is made of a material such as rubber, and when it is compressed by applying a winding pressure, the elastic ring (4) is deformed without contraction, thereby absorbing the winding pressure. The retraction space 10 is a space in which a part of the deformed elastic ring 4 is retracted and is recessed on the inner peripheral surface of the reel flange 5, for example, as shown in Fig.

The retraction space 10 is formed at a position on the inner circumferential surface of the reel flange 5 that faces the side surface of the elastic ring 4. 3, the retraction space 10 has annular recessed grooves 11 of the same shape at positions that oppose the side surfaces of the elastic rings 4 of the pair of left and right reel flanges 5a, 5b, Is formed. The depth of the recessed groove 11a on one reel flange 5a side is denoted by A, the depth of the recessed groove 11b on the other reel flange 5b side is denoted by C, The width D is equal to the thickness of the elastic ring 4 when the width of the concave grooves 11a and 11b of the elastic rings 5a and 5b is D,

At this time, when the width of the elastic ring 4 is B, the retraction space 10 has a sectional area A x D + C x D / elastic ring 4 sectional area B x D of 3.5 to 20%. When the ratio of the cross-sectional area of the retraction space 10 to the elastic ring 4 is less than 3.5%, that is, when the retraction space 10 is too narrow, the elastic ring 4 is compressively deformed in accordance with the winding pressure at the time of winding the adhesive film 2 It can not be withdrawn and can not absorb pressure. If the cross-sectional area ratio of the retraction space 10 and the elastic ring 4 is larger than 20%, the compression deformation becomes unstable, so that the function as the elastic body is deteriorated and the adhesive film 2 is wound up and collapsed.

Further, it is preferable that the retraction space 10 is sized to be held in contact with the elastic ring 4 when the elastic ring 4 is deformed to the maximum extent. As a result, the retraction space 10 supports the compressively deformed elastic ring 4, and stable absorption of the wire pressure can be achieved.

[Other retirement space: rib 1]

4, the retraction space 10 has a plurality of elongated projection ribs 12 formed on the inner circumferential surface of the reel flange 5 in addition to the recessed grooves 11 formed on the inner circumferential surface of the reel flange 5, A clearance is formed between the convex ribs 12 and the elastic ring 4 so that the distance between the elastic ring 4 and the reel flange 5 and the distance between the elastic ring 4 and the convex shape Or by adjusting the distance of the ribs 12.

4, by forming a clearance between the elastic ring 4 and the reel flange 5 and the convex rib 12, the retraction space 10 is formed between the elastic ring 4 and the convex ribs 12 And between the resilient ring 4 and the reel flange 5.

The retraction space 10 can also be formed by adjusting the height of the convex ribs 12 by bringing the convex ribs 12 into contact with the elastic rings 4 as shown in Fig. In this case, the retraction space 10 is between the elastic ring 4 and the reel flange 5.

[Other retirement space: rib]

6, the retraction space 10 has a plurality of elongated projection ribs 12 formed on the inner peripheral surface of the reel flange 5, as well as the recessed grooves 11 formed on the inner peripheral surface of the reel flange 5, And the end on the inner circumferential side of the elongated projection rib 12 is located at the position of the boundary position with the position where it opposes the elastic ring 4. [

That is, the reel flange 5 is provided so as to face the adhesive film 2 wound on the elastic ring 4, instead of being provided with the long projection ribs 12 at a position where the reel flange 5 is opposed to the elastic ring 4. Thereby, the reel flange 5 can support the recommended body side surface of the adhesive film 2 by the long projection ribs 12, and reduce the contact area with the binder resin, thereby suppressing the blocking.

At this time, the height of the elongated projection ribs 12a on one reel flange 5a side is A and the height of the elongated projection ribs 12b on the other reel flange 5b side is (A × D + C × D) / elastic ring (4) sectional area (A), the thickness of the elastic ring (4) is D, the width of the elastic ring (B x D) is preferably 3.5 to 20%.

[Other retirement space: Fantastic rib]

7, the retraction space 10 can also be formed by annular ribs 13 projecting from the inner circumferential surface of the reel flange 5. The annular rib 13 serves as a retraction space of the elastic ring 4 in which the inner side is compressively deformed and is formed concentrically with the reel flange 5 and is in contact with the outer peripheral side surface of the elastic ring 4 .

[Adhesive film]

Here, the adhesive film 2 wound on the reel member 1 will be described. The adhesive film 2 has an adhesive layer 20 and a base film 21 serving as a support for supporting the adhesive layer 20, as shown in Fig.

The adhesive layer 20 can be made of an anisotropic conductive film (ACF: Anisotropic Conductive Film) containing the conductive particles 22 in the binder (insulating adhesive composition) 20a, Or an insulating adhesive film (NCF: Non-Conductive Film) not containing the conductive particles 22.

As the binder 20a of the adhesive film 2, for example, a conventional binder containing a film forming resin, a thermosetting resin, a latent curing agent, a silane coupling agent and the like can be used. The adhesive film 2 is obtained by forming an anisotropic conductive composition in which the conductive particles 22 are dispersed in the binder 20a or an insulating adhesive composition containing no conductive particles 22 in the binder 20a on the base film 21 And is formed on the base film 21 by coating.

The base film 21 supports the binder 20a in the form of a film and is made of a material such as PET (Poly Ethylene Terephthalate), OPP (Oriented Polypropylene), PMP (Poly-4-methylpentene- 1; poly-4-methylpentene-1), PTFE (Polytetrafluoroethylene) and the like.

As the film-forming resin contained in the binder 20a, a resin having an average molecular weight of about 10,000 to 80,000 is preferable. Examples of the film-forming resin include various resins such as epoxy resin, modified epoxy resin, urethane resin, and phenoxy resin. Among them, a phenoxy resin is particularly preferable from the viewpoints 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.

Examples of the epoxy resin include, but are not limited to, naphthalene type epoxy resin, biphenyl type epoxy resin, phenol novolak type epoxy resin, bisphenol type epoxy resin, steel type epoxy resin, triphenolmethane type epoxy resin, Type epoxy resin, naphthol-type epoxy resin, dicyclopentadiene-type epoxy resin, and triphenylmethane-type epoxy resin. These may be used singly or in combination of two or more.

The acrylic resin is not particularly limited, and an acrylic compound, a liquid acrylate and the like can be appropriately selected depending on the purpose. For example, there may be mentioned methyl acrylate, ethyl acrylate, isopropyl acrylate, isobutyl acrylate, epoxy acrylate, ethylene glycol diacrylate, diethylene glycol diacrylate, trimethylolpropane triacrylate, dimethylol tricyclo (Meth) acrylate, decane diacrylate, tetramethylene glycol tetraacrylate, 2-hydroxy-1,3-diacryloxypropane, 2,2-bis [4- (acryloxymethoxy) Dicyclopentenyl acrylate, tricyclodecanyl acrylate, tris (acryloxyethyl) isocyanurate, urethane acrylate, epoxy acrylate, and the like can be given. It is also possible to use methacrylate as the acrylate. These may be used alone, or two or more of them may be used in combination.

Examples of the latent curing agent include, but are not limited to, various curing agents such as heat curing type and UV curing type. The latent curing agent does not react normally but is activated by various triggers selected according to applications such as heat, light, and pressurization, and initiates the reaction. Methods for activating the thermally active latent curing agent include a method of generating active species (cation or anion) by dissociation reaction by heating or the like, a method of stably dispersing in an epoxy resin at room temperature and a method of dissolving A method of initiating a curing reaction, a method of initiating a curing reaction by eluting a curing agent of a molecular sieve encapsulated type at a high temperature, a method of eluting and curing by microcapsule, and the like. Examples of the heat-activatable latent curing agent include imidazole-based, hydrazide-based, boron trifluoride-amine complexes, sulfonium salts, amine imides, polyamine salts, dicyandiamide, and the like, Or a mixture of two or more species. Among them, a microcapsule-type imidazole-based latent curing agent is preferable.

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

As the conductive particles 22, any one of known conductive particles used in the anisotropic conductive film can be mentioned. 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 and gold, metal oxides, carbon, graphite, Plastics or the like may be coated with a metal or a surface of the particles may be further coated with an insulating thin film. When the surface of the resin particle is coated with a 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, Styrene-based resin, and the like.

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

The adhesive film 2 may be configured to provide the cover film on the side opposite to the side where the base film 21 of the adhesive film 2 is laminated. In addition, for example, a copper foil-bonded film for electrically connecting the electrodes of a plurality of solar cell cells may be used.

Example 1

Next, an embodiment of the present invention will be described. In the present embodiment, a reel member having a different type of elastic ring 4 to be fitted to the winding core 3 was prepared, and an adhesive film having a length of 300 m was wound around each reel member. Then, it was confirmed whether or not the binder resin was released or blocked when the adhesive film was wound while rotating the winding core and the elastic ring from the respective reel members as usual. Further, the winding tightening load strength at the time of pulling out the adhesive film in the state of restricting the rotation of the winding core and the elastic ring of each of the reel members was measured, and evaluation was made as to whether or not the belt was released after measurement.

The reel member used in each of the embodiments and the comparative example is formed so that the retraction space 10 of the elastic ring 4 including the recessed groove 11 on the inner peripheral surface of the reel flange 5 is formed . As the adhesive film to be wound around each reel member, ACF manufactured by Sony Chemical & Information Device Co., Ltd. was used. The thickness of the adhesive layer of the adhesive film is 10 to 25 占 퐉, and the minimum melt viscosity of the binder is 3.0 占^10-4 Pa 占 퐏.

In Example 1, a butyl rubber having a Shore A hardness of 40 ° was used as a material of the elastic ring. The thickness D of the elastic ring is 2 mm and the ratio of the sectional area of the retraction space 10 to the elastic ring 4 is equal to the sectional area A of the retraction space 10 and the sectional area of the elastic ring 4 B × D) is 5%. Further, the tensile force at the time of winding the 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 a material of the elastic ring.

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

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

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

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

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

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

In Comparative Example 1, the same conditions as in Example 1 were used except that a conventional reel member without the elastic ring 4 was used to wind the adhesive film.

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

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

As shown in Fig. 9, with respect to the release of the binder resin and the presence or absence of blocking when the adhesive film was pulled out as usual from the reel members according to the examples and the comparative examples, the respective reel members were set on the measuring jig , And the adhesive film was pulled out, and 50 g of weight W was placed on the tip of the adhesive film, and left at room temperature for 24 hours. Then, the side surface of the reel flange was observed with an optical microscope, and it was confirmed whether or not the flange was released. Subsequently, the adhesive film was unwound as usual, and the presence or absence of blocking was confirmed. A case where no evacuation was observed was indicated by o, a case where evacuation was observed but no practical problem was indicated by o, and a case where blocking occurred and normally evacuation was impossible was indicated by x.

10, the respective reel members were set on the measuring jig, and the rotation of the winding core and the elastic ring was regulated, and the push-pull gauge G, the adhesive film was taken out, and the peak of the load was measured. Further, the side surface of the reel flange was observed with an optical microscope, and it was confirmed whether or not the flange was released. The measurement results are shown in Table 1.

As shown in Table 1, in the reel member according to each of the examples, there was no problem in that it was evacuated to such a degree that practically no problem occurred, and no blocking occurred. Further, the winding tightening load strength was also good at 1 N or more, and no unavoidable release was observed even after the drawing of the adhesive film.

In Examples 2, 4, 6, and 8, in which the Shore A hardness of the elastic ring was set to 80 degrees, in each of Examples, the winding tightening load strength was as good as 5 N or more.

On the other hand, in Comparative Example 1 in which the elastic ring was not provided, blocking occurred due to unintentional release when the adhesive film was taken out as usual, which made practical use difficult. In Comparative Example 2 using an elastic ring having a Shore A hardness of 30 degrees, the winding tightening load strength at the time of pulling out the adhesive film was as low as 0.5 N, and after the drawing out, it was evacuated, making practical use difficult. In Comparative Example 3 using an elastic ring having a Shore A hardness of 90 degrees, blocking occurred due to unintentional release when the adhesive film was taken out as usual, which made practical use difficult.

From this, it can be seen that the material of the elastic ring is preferably made to have a Shore A hardness of more than 30 DEG and less than 90 DEG.

Example 2

The ratio of the sectional area ratio of the retraction space 10 to the elastic ring 4 in the reel unit having the retracting space 10 of the same shape as that of the first embodiment: retraction space 10 D + C x D) / elastic ring 4 A sectional area (B x D) of 2% was prepared. Then, an adhesive film having a length of 300 m was wound around the reel member, and whether or not the binder resin was released or blocked when the adhesive film was normally pulled out from each reel member was checked. Further, the winding tightening load strength at the time of pulling out the adhesive film in the state where the rotation of each reel member was regulated was measured, and the presence or absence of the release after the measurement was evaluated.

In Example 9, butyl rubber having a Shore A hardness of 40 占 was used as a material of the elastic ring. Further, the thickness D of the elastic ring is 2 mm, and the tensile force at the time of winding the adhesive film is 0.75 N.

In Example 10, butyl rubber having a Shore A hardness of 80 deg. Was used as a material of the elastic ring. Further, the thickness D of the elastic ring is 2 mm, and the tensile force at the time of winding the adhesive film is 0.75 N.

The binder resin is released from the reel member as usual when the reel member is pulled out as usual, the presence or absence of blocking is observed, and the winding tension when the adhesive film is withdrawn in a state where the rotation of each reel member is regulated And the method of evaluating and evaluating the release of the adhesive film at the time of withdrawing the adhesive film are the same as those of the first embodiment. The measurement results are shown in Table 2.

As shown in Table 2, in the ninth and tenth embodiments, all of them were evacuated to such a degree that there was no problem in practice, and no blocking occurred. Further, the winding tightening load strength was also good at 1 N or more, and no unavoidable release was observed even after the drawing of the adhesive film.

Example 3

As Embodiment 3, a reel member in which the retraction space 10 is not formed is prepared. That is, the reel member according to the third embodiment has a sectional area ratio of the retraction space 10 to the elastic ring 4: A × D + C × D / the sectional area of the elastic ring 4 (B × D) was set to 0%. Then, an adhesive film having a length of 300 m was wound around the reel member, and whether or not the binder resin was released or blocked when the adhesive film was normally pulled out from each reel member was checked. Further, the winding tightening load strength at the time of pulling out the adhesive film in the state where the rotation of each reel member was regulated was measured, and the presence or absence of the release after the measurement was evaluated.

In Comparative Example 4, a butyl rubber having a Shore A hardness of 40 ° was used as a material of the elastic ring. Further, the thickness D of the elastic ring is 2 mm, and the tensile force at the time of winding the adhesive film is 0.75 N.

In Comparative Example 5, a butyl rubber having a Shore A hardness of 80 ° was used as a material of the elastic ring. Further, the thickness D of the elastic ring is 2 mm, and the tensile force at the time of winding the adhesive film is 0.75 N.

The binder resin is released from the reel member as usual when the reel member is pulled out as usual, the presence or absence of blocking is observed, and the winding tension when the adhesive film is withdrawn in a state where the rotation of each reel member is regulated And the method of evaluating and evaluating the release of the adhesive film at the time of withdrawing the adhesive film are the same as those of the first embodiment. The measurement results are shown in Table 3.

As shown in Table 3, in Comparative Example 4 and Comparative Example 5, all of the adhesive films were ejected when the adhesive film was taken out as usual, which made practical use difficult. This is because the retraction space when the elastic ring is compressively deformed is not formed, and therefore the elastic ring can not be sufficiently compressed, so that the wire pressure generated in the recommended body of the adhesive film can not be absorbed.

Example 4

As Example 4, a reel member having an elastic ring including urethane rubber was prepared. The reel member according to the fourth embodiment has a sectional area ratio (A x D x C x D) / elastic ring 4 sectional area (B x D) of the retraction space 10 and the sectional area ratio of the elastic ring 4 to the retraction space 10 ) Was set to 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 binder resin was released from the reel member as usual and the presence or absence of blocking was confirmed. Further, the winding tightening load strength at the time of pulling out the adhesive film in the state where the rotation of each reel member was regulated was measured, and the presence or absence of the release after the measurement was evaluated.

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

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

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

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

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

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

The binder resin is released from the reel member as usual when the reel member is pulled out as usual, the presence or absence of blocking is observed, and the winding tension when the adhesive film is withdrawn in a state where the rotation of each reel member is regulated And the method of evaluating and evaluating the release of the adhesive film at the time of withdrawing the adhesive film are the same as those of the first embodiment. The measurement results are shown in Table 4.

As shown in Table 4, all of Examples 11 to 16 have no problem in practical use. In Examples 11 to 13, in which the rubber hardness was 40, no release was observed when the adhesive film was wound normally, but the winding tightening load strength at the time of pulling out the adhesive film tended to decrease as the thickness increased . On the other hand, in Examples 14 to 16 in which the rubber hardness was 80 °, in Example 14 in which the thickness was 1 mm, when the adhesive film was normally rolled out, a slight clearance was observed, but as the thickness became thinner, The winding-out tightening load strength at the time of drawing is likely to increase.

In this manner, the evaluation of the release of the adhesive film when the winding core and the elastic ring are rotated as usual, and the winding tightening load strength at the time of pulling out the adhesive film while restricting the rotation of the winding core and the elastic ring are , Depending on the rubber hardness and thickness of the elastic ring.

1: Reel member
2: Adhesive film
3: winding core
4: elastic ring
5: Reel flange
10: Retirement Space
11: concave groove
12: Long protrusion rib
13:
20: adhesive layer
21: base film
22: conductive particles

Claims (10)

A winding core,
An annular elastic body fitted to the outer peripheral surface of the winding core and wound with a tape-
And a reel flange provided on both sides of the winding core,
Wherein the elastic body has a Shore A hardness of greater than 30 DEG and less than 90 DEG. The reel unit according to claim 1, wherein the elastic body has a Shore A hardness of 80 ° or more. The reel member according to claim 2, wherein a maximum load applied when the wound adhesive film is pulled out is 5N or more in a state in which the rotation of the winding core and the elastic body is restricted. The reel unit according to claim 1, wherein the reel flange is formed with a retraction space in which a part of the elastic body escapes when the elastic body is compressively deformed. The reel unit according to claim 4, wherein the retraction space is formed on the inner surface of the reel flange so as to face the elastic body, and the sectional area ratio is 3.5 to 20% with respect to the sectional area of the elastic body. The reel unit according to claim 5, wherein the retraction space is a size that is in contact with the elastic body when the elastic body is deformed to the maximum extent. The reel unit according to claim 4, wherein the retraction space is formed with an annular recessed groove on the inner surface of the reel flange at a position facing the elastic body. The reel unit according to claim 4, wherein the retracting space has a plurality of ribs radially arranged on an inner surface of the reel flange, and a reel unit formed by positioning an end of the rib on an inner circumferential side thereof, . The reel unit according to claim 4, wherein the retraction space is formed by providing an inner surface of the reel flange at a position where an annular rib concentrically formed with the reel flange faces the elastic body. The reel member according to claim 1, wherein the adhesive film is wound.

Images