JP5982159B2 - Reel member, adhesive film winding method, adhesive film unwinding method - Google Patents

Description

  The present invention relates to a reel member around which a tape-like adhesive film is wound, and more particularly, to a reel member that prevents winding of an adhesive film winding body, a method for winding an adhesive film, and a method for unwinding an adhesive film.

  Conventionally, a mounting method has been used in which an electronic component is mounted on a substrate using an adhesive film. For example, a COG (Chip on Glass) mounting method in which an IC chip that is 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 cell The connection method which connects a line is mentioned.

  In the conductive adhesive film, an adhesive layer in which conductive particles are dispersed in a binder resin is formed on a base film serving as a support. Such a conductive adhesive film 50 is used, for example, in the form of a film winding body wound around a core 53 of a reel member 51 having a pair of reel flanges 52 as shown in FIG. , See Patent Document 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 conveying roller is required, and a large time loss is caused in a process 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 near the core 53 and tightening occurs. Thereby, as for a film winding body, binder resin protrudes from the both sides of a base film, and there exists a possibility that adhesiveness and conduction | electrical_connection reliability may be impaired at the time of actual use. Further, 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 unwound normally can 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.

  Further, when the taper tension is applied, as shown in FIG. 19, winding deviation or loosening due to insufficient tension occurs on the outer peripheral side of the core, and as shown by a dotted line in FIG. 20, the conductive adhesive film 50 Another problem arises, such as the possibility of falling off between the reel flange 52 and the wound body.

  Accordingly, the present invention aims to lengthen the adhesive film, suppress overhang and blocking due to concentration of winding pressure, and prevent winding deviation and the like, a method for winding the adhesive film, and an adhesive film It aims at providing the unwinding method.

In order to solve the above-described problems, a reel member according to the present invention includes a core around which a tape-shaped adhesive film is wound, and a pair of reel flanges provided on both sides of the core, and the pair The reel flange is strongly clamped from the inner peripheral side to the outer peripheral side of the wound body of the adhesive film . Alternatively, in order to solve the above-described problem, a reel member according to the present invention includes a core around which a tape-shaped adhesive film is wound, and a pair of reel flanges provided on both sides of the core. The wound body of the adhesive film is sandwiched between the pair of reel flanges, and the core has a small-diameter core and a large-diameter core that is fitted to the small-diameter core and on which the adhesive film is wound. The large-diameter core is removed from the small-diameter core after the adhesive film is wound.

The winding method of the adhesive film according to the present invention includes a winding core on which a tape-shaped adhesive film is wound, and a pair of reel flanges provided on both sides of the winding core . In the method of winding the adhesive film around the reel member that is strongly held from the inner peripheral side to the outer peripheral side of the wound body of the adhesive film, a guide is provided so that the adhesive film is inclined with respect to the outer peripheral surface of the core. While passing between the pair of reel flanges.

The method for unwinding an adhesive film according to the present invention includes a core around which a tape-shaped adhesive film is wound, and a pair of reel flanges provided on both sides of the core, and the pair of reel flanges includes: In the unwinding method of unwinding the adhesive film from the reel member that is strongly clamped from the inner peripheral side to the outer peripheral side of the wound body of the adhesive film, the adhesive film is inclined with respect to the outer peripheral surface of the core. The guide is passed between the pair of reel flanges while being guided.

  According to the present invention, the reel member has the tape-like adhesive film wound around the core and sandwiches the adhesive film 2 wound body by the pair of reel flanges. As a result, the reel member can prevent the winding pressure from being accumulated in the vicinity of the core due to the tightening of the film winding body.

It is a side view showing a reel member to which the present invention is applied. It is sectional drawing which shows the reel member to which this invention was applied. 4 is a cross-sectional view showing a reel member in which a rib is provided on the reel flange 5. FIG. It is sectional drawing which shows one shape of a rib. It is sectional drawing which shows one shape of a rib. It is a top view which shows one shape of a rib. It is a top view which shows one shape of a rib. It is a top view which shows one shape of a rib. It is a figure which shows the reel member by which a core with a large and small core is fitted, (a) is sectional drawing, (b) is a disassembled perspective view. It is sectional drawing which shows the state which provided the space | gap in the reel member by which the rib was provided in the reel flange. It is a figure which shows the winding core comprised by the air shaft, (a) is a perspective view which shows the state expanded in diameter, (b) is a perspective view which shows the state reduced in diameter. It is sectional drawing which shows the state which provided the space | gap in the reel member in which the rib is not provided in the reel flange. It is sectional drawing which shows the reel member by which the taper-shaped rib was provided in the reel flange. It is sectional drawing which shows the state which inclined the reel flange in the reel member by which the reel flange was provided with the rib. It is sectional drawing which shows the state which inclined the reel flange in the reel member in which the rib is not provided in the reel flange. It is a front view which shows the state which lets an adhesive film pass between rib flanges, inclining with a guide roller. It is sectional drawing which shows the structure of an adhesive film. It is a perspective view which shows the conventional reel member. It is a side view which shows the state which winding misalignment and winding looseness produced in the conventional reel member. It is a side view which shows the state from which the reeling from the winding body of the conventional reel member and the adhesive film had arisen.

  Hereinafter, a reel member, an adhesive film winding method, and an adhesive film unwinding method 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 core 3 around which a tape-like adhesive film 2 is wound, and reel flanges 5 provided on both sides of the core 3. The adhesive film 2 wound around the reel member 1 forms a film winding body 4 wound around the core 3.

[Core / reel flange]
The winding core 3 has a cylindrical shape and has substantially the same width as the adhesive film 2 described later. Further, the core 3 is formed with an insertion port 3a through which a rotating device (not shown) for rotating the reel member 1 is inserted at the center. The winding core 3 is engaged with a pair of reel flanges 5 on both sides and rotated integrally with the reel flange 5.

  The pair of reel flanges 5 sandwich the adhesive film 2 wound around the core 3, and are 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.

[Hold film roll]
In the reel member 1, a tape-like adhesive film 2 is wound around a winding core 3, and a wound body 4 of the adhesive film 2 is sandwiched between a pair of reel flanges 5 as shown in FIG. 2. Accordingly, the reel member 1 can prevent the winding pressure from being accumulated in the vicinity of the core 3 due to the tightening of the film winding body 4.

  That is, the film winding body 4 of the reel member 1 is clamped by the reel flange 5, thereby suppressing the transmission of the winding pressure to the inner peripheral side, generating the tightening and accumulating the winding pressure to the inner peripheral side. Can be prevented. Accordingly, the reel member 1 can prevent blocking of the adhesive film 2 from sticking out of the binder resin, or the sticking out binder resin to the reel flange 5 and preventing the adhesive film 2 from being normally unwound.

  Further, the reel member 1 holds the film winding body 4 between the pair of reel flanges 5 so that the adhesive film 2 is forcibly pulled while the rotation of the core 3 and the reel flange 5 is restricted. In addition, pulling out of the adhesive film 2 can be suppressed, and the occurrence of winding tightening and the accumulation of winding pressure can be prevented. Therefore, according to the reel member 1, for example, when the adhesive film 2 is pulled around the roller of the transport device, even when the adhesive film 2 is pulled while the rotation of the reel member 1 is locked, the adhesive film 2 can be easily It is possible to prevent the binder resin from protruding and blocking due to winding tightening.

  As shown in FIG. 2, the reel member 1 can hold the adhesive film 2 by the reel flange 5 by setting the distance between the pair of reel flanges 5 to be equal to the width of the adhesive film 2.

[rib]
In addition, as shown in FIG. 3, the reel member 1 has a plurality of ribs 6 formed radially from the inner peripheral side to the outer peripheral side on the inner surface facing the film winding body 4, and the film winding is performed by the ribs 6. The body 4 may be clamped. At this time, in the reel member 1, the distance between the ribs 6 provided opposite to the pair of reel flanges 5 is the same as the width of the adhesive film 2, whereby the adhesive film 2 is formed by the ribs 6 of the reel flange 5. The film winding body 4 can be held.

  The reel member 1 sandwiches the film winding body 4 by the rib 6, thereby reducing the contact area with the film winding body 4 compared to the case where the film winding body 4 is sandwiched across the entire surface of the reel flange 5. Thus, blocking due to contact with the binder resin protruding from the adhesive film 2 can be suppressed.

  The rib 6 may be formed in a substantially semicircular cross section as shown in FIG. 4, and the cross section may be formed in a substantially rectangular shape as shown in FIG. 5. Moreover, the rib 6 can be formed in the size of width 0.5mm-5.0mm and height 0.03mm-2.0mm, for example.

  Further, as shown in FIG. 6, the rib 6 may have a shape that curves from the inner peripheral side to the outer peripheral side of the reel flange 5. In this case, since the reel member 1 has a large contact area between the film winding body 4 and the rib 6, the number of ribs 6 can be reduced.

  Further, as shown in FIG. 7, the ribs 6 may be alternately provided between the pair of reel flanges 5 at predetermined intervals. In this case, in the reel member 1, since the ribs 6 and the film winding body 4 are in contact with each other, the load on the film winding body 4 is small and the shape stability of the adhesive film 2 is excellent.

  Furthermore, the rib 6 may be formed in a wide rectangular plate shape as shown in FIG. In this case, since the film winding body 4 is widely supported by the ribs 6 by being in contact with the wide ribs 6, the number of the ribs 6 is reduced and the contact between the ribs 6 and the film winding body 4 is reduced. The area can be maintained.

  In the reel member 1, the rib 6 is formed from the inner periphery to the outer periphery of the reel flange 5, so that the winding pressure accumulated in the film winding body 4 and the internal stress generated in the reel flange 5 itself are changed due to a change with time. By manifesting, it is possible to prevent the reel flange 5 from being distorted. Therefore, it is possible to prevent the adhesive film 2 from falling off due to the gap between the pair of reel flanges 5 being opened.

  In recent years, since the width of the adhesive film 2 has become narrower with the miniaturization of electronic parts and the narrowing of the adhesive region, the tolerance of the gap error between the pair of reel flanges 5 is also low. Further, as the adhesive film 2 becomes longer, the diameter of the reel flange 5 becomes larger, and it is difficult to maintain a dimensional tolerance over the entire surface. Therefore, the reel flange 5 is formed with ribs 6 having a small dimensional tolerance from the inner periphery to the outer rim, thereby absorbing the dimensional tolerance of the reel flange 5 and separating the pair of reel flanges due to the distortion of the reel flange 5. It is possible to prevent the adhesive film 2 from dropping off from the film winding body 4 (see FIG. 20), and to make the adhesive film 2 longer and narrower.

  In addition, the reel member 1 has a pair of reel flanges 5 engaged with the core 3 so as to be close to and away from each other. The distance can be adjusted. In such a configuration, for example, an engagement shaft that is inserted into an engagement port such as the insertion port 3 a provided in the core 3 is erected on the inner peripheral surface of the reel flange 5, and the reel flange 5 depends on the insertion depth of the engagement shaft. The structure which adjusts the distance between can be illustrated.

[Core double core]
Further, as shown in FIG. 9A, the reel member 1 includes a winding core 3 having a small-diameter core 8 and a large-diameter core 9 that is fitted to the small-diameter core 8 and on which the adhesive film 2 is wound. It may be configured. The small-diameter core 8 is formed with an insertion port 8a through which a rotating device (not shown) that rotates the reel member 1 is inserted. The large diameter core 9 is detachably fitted from the small diameter core 8.

  In such a core 3, the adhesive film 2 is wound around the large-diameter core 9 in a state where the diameter is expanded by fitting the small-diameter core 8 and the large-diameter core 9. And the winding core 3 is diameter-reduced by removing the large diameter core 9 from the small diameter core 8 as shown in FIG.9 (b), when winding of the adhesive film 2 is complete | finished. As a result, as shown in FIG. 10, the reel member 1 is provided with a gap 10 between the film winding body 4 and the small-diameter core 8. This gap 10 is an area for absorbing the winding pressure accumulated on the inner peripheral side of the wound body when the film winding body 4 is tightened. By providing the gap 10, the reel member 1 suppresses the accumulation of the winding pressure by releasing the winding pressure by the adhesive film 2 on the inner circumferential side of the wound body when the winding pressure is transmitted to the inner circumferential side. And the protrusion and blocking of the adhesive film 2 can be prevented.

[Air shaft]
The reel member 1 includes a core 3 composed of large and small cores 8 and 9 and, as shown in FIG. 11, the core 3 is composed of an air shaft 11 whose outer diameter is variable. Also good. In this case, as illustrated in FIG. 11A, the adhesive film 2 is wound around the core 3 in a state where the diameter of the core 3 is increased by protruding the lug 12. When the winding of the adhesive film 2 is completed, the lug 12 is retracted into the shaft and the diameter of the core 3 is reduced, as shown in FIG. Also by this, as shown in FIG. 10, the reel member 1 is provided with a gap 10 between the film winding body 4 and the air shaft 11.

  Here, as described above, since the reel member 1 holds the film winding body 4 between the pair of reel flanges 5, after the winding of the adhesive film 2 is finished, the large-diameter core 9 is removed, or Even when the diameter of the core 3 is reduced by retracting the lug 12, the wound state can be maintained without the film winding body 4 being separated.

  As shown in FIG. 12, also in the reel member 1 in which the rib 6 is not formed on the reel flange 5, the gap 10 may be provided by reducing the diameter of the core 3.

[Holding strongly from the inner circumference side to the outer circumference side of the film winding body]
Further, the reel member 1 may be strongly clamped from the inner peripheral side to the outer peripheral side of the film winding body 4 by a pair of reel flanges. Thereby, the reel member 1 prevents the winding pressure from accumulating from the outer peripheral side of the film winding body 4 to the inner peripheral side, and the winding on the inner peripheral side of the film winding body 4 that is likely to protrude or block. Tightening can be suppressed.

  Further, the reel member 1 can be easily pulled out even when the adhesive film 2 is forcibly pulled while the rotation of the reel member 1 is locked and the rotation of the core 3 and the reel flange 5 is restricted. It is not possible to prevent the binder resin from protruding or blocking due to winding tightening.

  Furthermore, the reel member 1 is difficult to be clamped at a uniform pressure between the inner peripheral side and the outer peripheral side of the film wound body 4 by increasing the diameter of the reel flange 5 as the adhesive film 2 becomes longer. However, the shortage of the clamping pressure on the outer peripheral side can be eliminated by configuring the film winding body 4 to be strongly clamped from the inner peripheral side to the outer peripheral side.

For example, as shown in FIG. 13, the reel flange 5 has a height from the inner peripheral side to the outer peripheral side, as shown in FIG. 13. It can be formed by providing a tapered rib 14 that increases. In FIG. 13, the gap 10 is provided between the winding core 3 and the film winding body 4 by reducing the diameter of the winding core 3. Further, the angle θ ₁ of the tapered rib 14 is set, for example, in the range of 0.1 ° to 5 °, and preferably 0.3 °.

Further, as shown in FIG. 14, the reel member 1 may be configured such that the outer peripheral side of the pair of reel flanges 5 is narrowed by bending or bending the outer peripheral side of the reel flange 5. At this time, the reel flange 5 may form a rib 6, and the outer periphery side of the film winding body 4 may be strongly clamped by the rib 6, and the rib 6 is not provided as shown in FIG. The outer peripheral side of the film winding body 4 may be strongly held by the outer peripheral side inner surface. The inclination angle theta ₂ of the reel flange 5 is set in a range of, for example, 0.2 ° to 5 °.

[Method of winding adhesive film]
Next, the process of winding the adhesive film 2 around the reel member 1 will be described. Since the reel member 1 holds the film winding body 4 between the pair of reel flanges 5, the distance between the pair of reel flanges 5 is substantially the same as the width of the adhesive film 2. Therefore, when the reel member 1 winds the adhesive film 2 around the core 3, the reel member 1 guides the adhesive film 2 so as to be inclined with respect to the outer periphery of the core 3 as shown in FIG. Pass between the flanges 5.

That is, when the adhesive film 2 is passed through the reel member 1 in parallel with the outer peripheral surface of the winding core 3 as in the past, both sides of the adhesive film 2 are in sliding contact with the inner peripheral surfaces of the pair of reel flanges 5 and the winding is performed. Winding around the core 3 is hindered. Therefore, when the adhesive film 2 is wound around the reel member 1, the adhesive film 2 is tilted with respect to the outer peripheral surface of the core 3 by the guide roller 15 to an angle that does not slide on the pair of reel flanges 5. The inclination angle theta ₃ of the guide roller 15 is set in the range of, for example, 0.1 ° to 15 °.

  The adhesive film 2 that has passed between the pair of reel flanges 5 is wound in parallel with the outer peripheral surface of the core 3 to form a film wound body 4, and the inner peripheral surface of the pair of reel flanges 5 or the ribs 6, 14 will be held. Thereby, the adhesive film 2 can be smoothly wound around the reel member 1.

[How to unwind adhesive film]
Similarly, in the step of unwinding the adhesive film 2 from the reel member 1, the adhesive film 2 is passed between the pair of reel flanges 5 while being guided by the guide roller 15 so as to be inclined with respect to the outer periphery of the core 3. Thereby, the adhesive film 2 can be smoothly unwound from the reel member 1 without slidingly contacting the reel flange 5.

  At this time, the unwound adhesive film 2 forms the film winding body 4 and is sandwiched between the inner peripheral surfaces of the pair of reel flanges 5 or the ribs 6 and 14, and thus is applied at the time of unwinding. It is possible to prevent the load from being transmitted to the film winding body 4 as a winding pressure, and to prevent the binder resin from protruding or blocking due to winding tightening.

[Composition of adhesive film]
Here, the adhesive film 2 wound around the reel member 1 will be described. As shown in FIG. 17, 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) containing conductive particles 22 in a binder (insulating adhesive composition) 20a, but is not limited thereto. The insulating adhesive film (NCF: Non-Conductive Film) which does not contain the electroconductive particle 22 in 20a may be sufficient.

  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, hydrazide, boron trifluoride-amine complexes, sulfonium salts, amine imides, polyamine salts, dicyandiamide, etc., and modified products thereof. The above mixture may be sufficient. Among these, a microcapsule type imidazole-based latent curing agent is preferable.

  Although it does not specifically limit as a silane coupling agent, For example, an epoxy type, an amino type, a mercapto sulfide type, a ureido type etc. can be mentioned. 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 include those in which the surface of particles such as plastic is coated with metal, or 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 epoxy resin, phenol resin, acrylic resin, acrylonitrile / styrene (AS) resin, benzoguanamine resin, divinylbenzene resin, 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.

  Moreover, the adhesive film 2 is good also as a structure which provides a cover film also on the surface side on the opposite side to the surface where the base film 21 of the adhesive film 2 was laminated | stacked. 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 embodiment, a reel member that sandwiches the wound body of the adhesive film with a pair of reel flanges and a conventional reel member are prepared, the adhesive film is pulled out, and the length of the adhesive film is extended or blocked. The occurrence was observed.

  In Example 1, a reel member in which 12 linear ribs are radially formed on the inner surface facing the film winding body from the inner peripheral side to the outer peripheral side, and the film winding body is sandwiched by the ribs. Was used (see FIG. 3). The outer diameter of the reel flange is 250 mm.

  In Example 2, the same conditions as in Example 1 were used except that a winding core composed of a large-diameter core and a small-diameter core was used and a reel member in which a gap was formed between the film winding body and the winding core was used. (See FIG. 10).

  In Example 3, 12 taper-shaped ribs were radially formed on the inner surface facing the film winding body from the inner peripheral side toward the outer peripheral side, and the film winding body was sandwiched by the tapered ribs. A reel member was used (see FIG. 13). The outer diameter of the reel flange is 300 mm. The taper angle of the tapered rib is 0.3 °. Moreover, in Example 3, the core which consists of a large diameter core and a small diameter core was used, and the space | gap was provided between the film winding body and the core.

  In Comparative Example 1, a conventional reel member having a clearance between the film winding body and the reel flange was used (see FIG. 18).

  Each of the reel members according to Examples and Comparative Examples was wound with an adhesive film of 300 m, 500 m, 600 m, and 700 m, and observed the presence or absence of protrusion and blocking. ○ when no protrusion or blocking is observed, and when protrusion is recognized but blocking is not recognized, it is △ as no problem in practical use, and when protrusion and blocking are recognized, it is assumed that it cannot be put into practical use. It was. The results are shown in Table 1.

  As shown in Table 1, according to Examples 1 to 3, blocking was not recognized even in a state where the film was wound for 700 m, and it was able to withstand practical use. On the other hand, in Comparative Example 1, there was no problem up to 300 m, but protrusion and blocking were observed in those wound up to 500 m or more, and they could not be put into practical use. From this, it can be seen that the length can be increased by sandwiching the wound body of the adhesive film between the pair of reel flanges.

  Moreover, when Examples 1-3 were seen, the protrusion of Example 2 which provided the space | gap rather than Example 1 was suppressed when lengthening. From this, it can be seen that the formation of voids is advantageous for suppressing the cumulative winding pressure. Further, the protrusion of Example 3 in which the tapered rib was formed was suppressed from being extended when the length was increased. From this, it can be seen that it is advantageous for the accumulation suppression of the winding pressure that the film winding body is strongly held from the inner peripheral side to the outer peripheral side.

1 reel member, 2 adhesive film, 3 roll core, 3a insertion port, 4 film winding body, 5 reel flange, 6 rib, 8 small diameter core, 9 large diameter core, 10 air gap, 11 air shaft, 12 lug, 14 taper Rib, 20 adhesive layer, 21 base film, 22 conductive particles

Claims (10)

A core around which a tape-like adhesive film is wound;
A pair of reel flanges provided on both sides of the core,
The pair of reel flanges are reel members that are strongly clamped from the inner peripheral side to the outer peripheral side of the wound body of the adhesive film . A core around which a tape-like adhesive film is wound;
A pair of reel flanges provided on both sides of the core,
Holding the wound body of the adhesive film by the pair of reel flanges,
The winding core has a small-diameter core and a large-diameter core that is fitted to the small-diameter core and on which the adhesive film is wound,
The large-diameter core is a reel member that is removed from the small-diameter core after the adhesive film is wound.   The reel member according to claim 1, wherein the reel flange is provided with a rib on an inner surface facing the wound body of the adhesive film, and the wound body of the adhesive film is sandwiched by the rib.   The reel member according to claim 3, wherein the rib increases in height from an inner peripheral side to an outer peripheral side of the reel flange. The reel member according to any one of claims 1 to 3, wherein the pair of reel flanges are close to each other from an inner peripheral side to an outer peripheral side. The reel member according to claim 1 , wherein the winding core has a variable outer diameter, a large diameter when the adhesive film is wound, and a small diameter after the adhesive film is wound. The reel member according to any one of claims 1 to 6 , wherein the pair of reel flanges are supported so as to be close to and away from each other by engaging with the winding core. The reel member according to any one of claims 1 to 7 , wherein the adhesive film is wound. A winding core on which a tape-shaped adhesive film is wound, and a pair of reel flanges provided on both sides of the winding core, the pair of reel flanges from the inner peripheral side of the wound body of the adhesive film In the method of winding the adhesive film around the reel member that is strongly clamped toward the outer peripheral side ,
A method for winding an adhesive film in which the adhesive film is passed through the pair of reel flanges while being guided so as to be inclined with respect to the outer peripheral surface of the core. A winding core on which a tape-like adhesive film is wound, and a pair of reel flanges provided on both sides of the winding core, the pair of reel flanges from the inner peripheral side of the wound body of the adhesive film In the unwinding method of unwinding the adhesive film from the reel member that is strongly clamped toward the outer peripheral side ,
A method for unwinding the adhesive film in which the adhesive film is passed through the pair of reel flanges while being guided to be inclined with respect to the outer peripheral surface of the core.

Images