JP2013189305A - Reel member, film winding method, and film unwinding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an adhesive film longer and to suppress protrusion and blocking.SOLUTION: A reel member includes: a first winding core 3 around which an adhesive film 2 is to be wound; a second cylindrical winding core 4 which is concentrically arranged on the outer peripheral side of the first winding core 3 and around which the adhesive film 2 is to be wound; and a reel flange 5 which is on side or both sides of the first and second winding cores 3 and 4. The first winding core 3 can be rotated independently of the second winding core 4 and rotated in synchronization therewith. An opening 7, through which the adhesive film 2 is to be inserted, is formed in the second winding core 4.

Description

  The present invention relates to a reel member around which an adhesive film is wound, a winding method for winding an adhesive film around the reel member, and a film unwinding method for unwinding the adhesive film from the reel member.

  2. Description of the Related Art Conventionally, a mounting method for mounting electronic components using an adhesive film on a substrate has been performed. 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 insulating binder resin layer in which conductive particles are dispersed is formed on a release substrate. Such a conductive adhesive film 50 is used 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 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 in the vicinity of the core 51 as shown in FIG. As a result, in the reel wound body, the binder resin protrudes from both sides of the release substrate, 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.

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

  For such problems, a method of suppressing the protrusion by providing the release substrate wider than the binder resin layer (see Patent Documents 2 and 3) and a tension for winding the adhesive film more than the core part. 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 release substrate wider than the binder resin layer, in addition to the complexity of manufacturing, the binder resin layer is prevented from flowing due to the winding pressure even though it can suppress protrusion and blocking. This is not possible, and 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. 11, 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. Another problem arises, such as falling off from the wound body.

  Therefore, the present invention provides a reel member, a film winding method, and a film unwinding method that can increase the length of the adhesive film, suppress protrusion and blocking due to concentration of winding pressure, and prevent winding deviation and the like. The purpose is to provide.

  In order to solve the above-described problems, a reel member according to the present invention includes a first core around which an adhesive film including a binder resin layer and a support that supports the binder resin layer is wound; A cylindrical second core around which the adhesive film is wound, and one or both sides of the first core and the second core. A reel flange provided, wherein the first core is capable of rotating independently of the second core in synchronization with the second core, and the second core is bonded to the second core. An opening through which the film is inserted is formed.

  Moreover, the film winding method which concerns on this invention is arrange | positioned concentrically at the outer peripheral side of the 1st winding core and the said 1st winding core by which an adhesive film is wound, and the said adhesive film is wound. A method of winding the adhesive film around a reel member comprising a cylindrical second winding core and a reel flange provided on one side or both sides of the first winding core and the second winding core. Then, the tip of one adhesive film is inserted into an opening provided in the second core, and only the first core that is rotatable independently of the second core is attached. Rotating and winding the adhesive film around the first core, and after the amount of winding around the first core reaches a predetermined amount, the second core and the first core The adhesive film is wound around the second core by synchronously rotating in the same direction.

  The film unwinding method according to the present invention includes a first core wound with an adhesive film and a concentric arrangement on the outer peripheral side of the first core, and the adhesive film is wound. A cylindrical second winding core; and a reel flange provided on one side or both sides of the first winding core and the second winding core, and one adhesive film is the second winding core. A method for unwinding an adhesive film that unwinds the adhesive film from a reel member that is passed through an opening provided in the wire and wound around the first core, wherein the first core and the first core 2 cores are synchronously rotated in the same direction to unwind the adhesive film wound around the second core, and all the adhesive film wound around the second core is unwound. After that, only the first core that is rotatable independently of the second core is used. By rolling, in which unwinding the adhesive film wound in the first winding core.

  According to the present invention, since the first winding core and the second winding core provided concentrically on the outer peripheral side thereof are provided, the winding pressure accumulated in the vicinity of the winding core is changed to the first winding core and the second winding core. Can be dispersed in the core. Therefore, according to this invention, even if it lengthens an adhesive film, the protrusion and blocking of the binder resin layer by accumulation of winding pressure can be prevented. In addition, the present invention does not require winding with a reduced winding pressure, and can prevent the adhesive film from being wound or dropped.

It is a perspective view which shows the reel member to which this invention was applied. It is sectional drawing which shows the structure of a reel flange and a 1st core. It is sectional drawing which shows the engagement state to the reel member by a drive member. It is a perspective view which shows the reel member by which the adhesive film was wound. It is sectional drawing which shows an adhesive film. It is a side view which shows the reel member after an adhesive film is wound, or after all are unwound. It is a side view which shows the reel member in the state by which the adhesive film is wound around the 1st core, or the adhesive film is unwound from the 1st core. It is a side view which shows the reel member in the state by which the adhesive film is wound around the 2nd winding core, or the adhesive film is being unwound from the 2nd winding core. It is a perspective view which shows 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. It is a side view which shows the state which winding misalignment and winding looseness produced in the conventional reel member.

  Hereinafter, a reel member, a film winding method, and a 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, the reel member 1 to which the present invention is applied is arranged concentrically on a first winding core 3 around which an adhesive film 2 is wound and on the outer peripheral side of the first winding core 3. A cylindrical second core 4 around which the adhesive film 2 is wound, and a reel flange 5 provided on both sides of the first core 3 and the second core 4 are provided.

[First core / second core / opening]
The first winding core 3 has a cylindrical shape, and the adhesive film 2 is wound around it. The first core 3 is formed with an engagement hole 3a through which a first drive member (not shown) for rotationally driving the first core 3 is inserted and engaged.

  The first core 3 can be rotated independently of the second core 4 when the adhesive film 2 is wound or unwound, and is synchronized with the second core 4. Are rotated together.

  The second core 4 has a cylindrical shape larger in diameter than the first core 3, and the adhesive film 2 is wound around the second core 4. Further, the second core 4 is disposed concentrically outside the first core 3. Further, the second core 4 is provided with an opening 7 through which the adhesive film 2 is inserted in a part of the outer peripheral surface. In the second core 4, the adhesive film 2 is wound around the first core 3 through the opening 7, and the adhesive film 2 wound around the first core 3 is unwound.

  The diameter of the first core 3 is, for example, 85 mm, and is preferably 50 mm to 100 mm. Moreover, the diameter of the 2nd winding core 4 is 210 mm, for example, and it is preferable to set it as 180 mm-320 mm. The adhesive film 2 can be wound up to 600 m, for example, on the first core 3 and the second core 4. The winding length around the first core 3 and the second core 4 is preferably 100 mm to 450 mm.

[Reel flange]
Reel flanges 5 are provided on both sides of the first core 3 and the second core 4. The reel flange 5 supports the adhesive film 2 wound around the first winding core 3 and the second winding core 4 and is formed in a disc 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.

  The reel flange 5 is rotationally driven by a second drive member (not shown). Further, the second flange 4 is integrally formed with the reel flange 5 and is rotated by the second driving member, whereby the second core 4 can be rotated. As a configuration in which the second core 4 is formed integrally with the reel flange 5, for example, a method of bonding the flange surface of the reel flange 5 and both end surfaces of the cylindrical second core 4, or FIG. a) As shown in (b), there is a method of projecting an arc-shaped convex portion 4a constituting the second core 4 by being abutted against the inner surface of the reel flange 5. The reel member 1 can form a predetermined distance between the reel flanges 5 by interposing the second winding core 4 between the inner surfaces of the pair of reel flanges 5.

  Further, the reel member 1 is configured such that the first core 3 can freely rotate with respect to the reel flange 5. That is, in the reel member 1, the insertion hole 5 a that rotatably supports the end of the first core 3 is formed in the reel flange 5, so that the first core 3 can freely move with respect to the reel flange 5. It can be rotated.

  As a configuration for rotatably supporting the first core 3 on the reel flange 5, for example, as shown in FIG. 2A, after both ends of the first core 3 are inserted into the insertion hole 5a, A method of attaching a stopper plate 8 for preventing the first core 3 from coming off so as to protrude from the outer surface of the reel flange 5 to the insertion hole 5a, as shown in FIG. There is a method in which a stopper step portion 9 for preventing the winding core 3 of 1 is recessed is provided. As a matter of course, the reel member 1 according to the present invention can adopt any configuration in which the first core 3 is rotatably supported by the reel flange 5.

  The reel member 1 includes a first drive member that rotates the first core 3 and a second drive member that rotates the reel flange 5, and the first drive member is driven to drive the first drive member. By rotating only the core 3 independently of the second core 4 and driving the first drive member and the second drive member synchronously, the first core 3 and the second winding are driven. The core 4 can be rotated simultaneously.

  As an example of such a drive member, for example, as shown in FIG. 3A, a first drive unit 11 that engages with the engagement hole 3a of the first core 3, and a concentric circle with the engagement hole 3a. The drive pin 10 in which the 2nd drive part 12 engaged with the penetration hole 5a of the reel flange 5 provided in the shape is formed is mentioned. The first drive unit 11 is a small-diameter part formed at the tip of the drive pin 10, and the second drive unit 12 has a larger diameter than the first drive unit 11 formed in the middle part of the drive pin 10. It is a part. Then, as shown in FIG. 3 (b), the drive pin 10 is engaged with the first drive portion 11 with the engagement hole 3a by inserting only the tip into the engagement hole 3a, and the first winding. Only the core 3 can be rotated. At this time, the second drive unit 12 is separated from the insertion hole 5a.

  As shown in FIG. 3 (c), the drive pin 10 is further inserted to the intermediate portion, so that the second drive portion 12 is inserted in addition to the engagement between the first drive portion 11 and the engagement hole 3a. It can be engaged with the hole 5a. The first and second drive parts 11 and 12 are engaged with the engagement hole 3a and the insertion hole 5a by, for example, forming a concave part and a convex part that are fitted to each other over the insertion / removal direction of the drive pin 10 and the like. This can be done according to the configuration.

[Winding state / action / effect]
As shown in FIG. 4, the reel member 1 is wound around the first core 3 after the tip of the adhesive film 2 has passed through the opening 7 provided in the second core 4. The reel member 1 is then wound around the second core 4 when a predetermined amount of the adhesive film 2 is wound around the first core 3. Thus, since the reel member 1 includes a plurality of winding cores around which the adhesive film 2 is wound, the winding pressure applied to the adhesive film 2 can be dispersed.

  That is, in the reel member having only one core, the winding pressure is accumulated near the core as the adhesive film 2 becomes longer. On the other hand, according to the reel member 1, the first winding core 3 and the second winding core 4 provided concentrically on the outer peripheral side thereof are provided. It can be dispersed in the core 3 and the second core 4. Therefore, according to the reel member 1, even if the adhesive film 2 is elongated, it is possible to prevent the binder resin layer from protruding or blocking due to the accumulation of the winding pressure. In addition, the reel member 1 does not need to be wound with a lower winding pressure, and the adhesive film 2 can be prevented from being displaced or dropped.

[L1: L2]
The reel member 1 has a ratio (L1) between the length L1 of the adhesive film 2 wound around the first core 3 and the length L2 of the adhesive film 2 wound around the second core 4. : L2) is preferably wound so as to be 5: 1 to 1: 5, more preferably 1: 1 to 1: 5, that is, it is more preferable to wind the second core 4 longer, , About 1: 2 is particularly preferable.

  This is because the first core 3 is smaller in diameter than the second core 4, the winding pressure is easily applied to the adhesive film 2, and protrusion and blocking are likely to occur. Therefore, in the adhesive film 2 having a predetermined length, it is preferable that the length wound around the first core 3 is shorter than the length wound around the second core 4.

[Adhesive film]
Here, the adhesive film 2 wound around the reel member 1 will be described. As shown in FIG. 5, the adhesive film 2 includes a binder resin layer 20 and a release substrate 21 that serves as a support that supports the binder resin layer.

  The binder resin 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 onto the release substrate 21. By doing so, it is formed on the peeling substrate 21.

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

  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 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 release substrate 21 is used, but 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 in the surface side on the opposite side to the surface where the peeling base material 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.

[Winding method]
Next, the process of winding the adhesive film 2 around the reel member 1 will be described. First, the adhesive film 2 is inserted through the opening 7 provided in the second core 4. At this time, as shown in FIG. 6, when the opening 7 does not correspond to the winding position of the adhesive film 2 around the first core 3 as shown in FIG. The second core 4 is rotated so that the winding position on the core 3 corresponds to the opening 7. Thereby, the reel member 1 can be wound around the first core 3 without the adhesive film 2 being in sliding contact with the second core 4 or the side edge of the opening 7.

  Next, the first drive member is engaged with the engagement hole 3a of the first core 3, and only the first core 3 is rotated in the direction of arrow R1 in FIG. At this time, the second core 4 is fixed by fixing the reel flange 5. Thereby, the adhesive film 2 is wound around the first core 3 through the opening 7.

  Further, as the second winding core 4 is wound around the first winding core 3, the diameter of the wound body becomes thicker and the winding position is displaced accordingly. The position of the opening 7 of the second core 4 is made to correspond to the winding position by rotating the flange 5. Thereby, the reel member 1 can always be wound around the first core 3 without the adhesive film 2 being in sliding contact with the second core 4 or the side edge of the opening 7.

  When the adhesive film 2 is wound around the first core 3 by a predetermined amount, the adhesive film 2 is subsequently wound around the second core 4. At this time, the second drive member is engaged with the reel flange 5 and driven in synchronization with the first drive member. Thereby, the second core 4 provided integrally with the reel flange 5 is rotated in the direction of the arrow R2 in FIG. 8 in synchronization with the first core 3. The adhesive film 2 is wound around a second core 4 provided on the outer peripheral side.

  Here, the first core 3 and the second core 4 are rotated in the same direction in synchronization with each other because the adhesive film 2 passes through the opening 7 so that the first core 3 and the second core 4 are rotated. This is because it is wound around the core 4. That is, the first winding core 3 and the second winding core 4 are driven separately, thereby preventing the adhesive film 2 from being pulled by the side edge portion of the opening 7 and breaking the winding state. It is to do.

  When the adhesive film 2 is wound around the second core 4 by a predetermined amount, the first and second drive members are stopped, and the winding of the adhesive film 2 around the reel member 1 is completed.

[Unwinding method]
Next, a process of unwinding the adhesive film 2 from the reel member 1 around which the adhesive film 2 is wound will be described. The unwinding process of the adhesive film 2 is a process reverse to the winding process described above. That is, first, the first drive member is engaged with the engagement hole 3 a of the first core 3, and the second drive member is engaged with the reel flange 5. Then, the first drive member and the second drive member are driven in synchronization, the first winding core 3 and the second winding core 4 are synchronized, and the direction indicated by the counter arrow R1 and the counter arrow in FIG. Rotate in the R2 direction. Thereby, the adhesive film 2 wound around the second core 4 is unwound.

  When all of the adhesive film 2 wound around the second core 4 is unwound, the second driving member is stopped to stop the rotation of the second core 4. Then, only the first drive member is driven, and only the first core 3 is rotated in the direction opposite to the arrow R1 in FIG.

  At this time, the second core 4 is rotated to a position where the opening 7 corresponds to the unwinding position of the adhesive film 2 from the first core 3. Thereby, the reel member 1 can be unwound from the first core 3 without the adhesive film 2 being in sliding contact with the second core 4 or the side edges of the opening 7.

  Further, as the second winding core 4 is wound, the diameter of the wound body becomes narrower as the adhesive film 2 is unwound from the first winding core 3, and when the unwinding position is displaced, the reel flange is accordingly changed. 5 is rotated so that the position of the opening 7 of the second core 4 corresponds to the unwinding position. Thereby, the reel member 1 can always be unwound from the first core 3 without the adhesive film 2 being in sliding contact with the second core 4 or the side edges of the opening 7.

  When all of the adhesive film 2 wound around the first core 3 is unwound, it is replaced with a new reel member 1.

[Boundary area]
The adhesive film 2 wound around the reel member 1 can detect a boundary region between a portion wound around the first core 3 and a portion wound around the second core 4. For example, a configuration in which the binder resin layer 20 is not provided may be employed. The region A is a part of the region extending from one end side of the portion wound around the first core 3 of the adhesive film 2 to the one end side region of the portion wound around the second core 4 or Refers to everything.

  By using the adhesive film 2 provided with the region A, when the adhesive film 2 is wound, the region A is detected, and a predetermined amount is wound around the first core 3, and the first core is wound. The timing at which the core is switched from 3 to the second core 4 can be detected. That is, from the state where only the first core 3 is rotated by the first drive member, the first and second cores 3 and 4 are rotated synchronously by the first and second drive members. The timing to switch to can be detected.

  Similarly, by using the adhesive film 2 provided with the region A, when the adhesive film 2 is unwound, all of the adhesive film 2 wound around the second core 4 is unwound, and the second winding The timing at which the core for unwinding the adhesive film 2 from the core 4 to the first core 3 is switched can be detected. That is, the state where only the first core 3 is rotated by the first drive member from the state where the first and second cores 3 and 4 are rotated synchronously by the first and second drive members. The timing to switch to can be detected.

  The adhesive film 2 has a configuration in which the binder resin layer 20 is not provided as long as the boundary region between the part wound around the first core 3 and the part wound around the second core 4 can be detected. In addition, any configuration such as coloring can be used.

  Next, examples of the present invention will be described. In the present embodiment, a reel member 1 (double core) having a first core 3 and a second core 4 and a conventional reel member (single core) having one core, A predetermined amount of the adhesive film 2 is wound, the binder resin is protruded, the presence or absence of blocking at the time of drawing out the film, and the presence or absence of winding deviation or dropping are measured, and the adhesive film 2 is drawn from each reel member to be formed on the glass substrate. The number of trapped particles was measured when they were connected to the bumps by hot pressing.

  As the adhesive film 2, an ACF having a width of 1.5 mm (CP30941-20AB: manufactured by Sony Chemical & Information Device Co., Ltd.) was used. In the reel member 1 according to Examples 1 to 7, the diameter of the first core 3 is 85 mm, and the diameter of the second core 4 is 210 mm.

  In Example 1, a double-core reel member 1 was used, and an adhesive film 2 having a length of 300 m was wound on the first core 3 by 150 m and on the second core 4 by 150 m. The tension during winding is 30 g.

  In Example 2, a double-core reel member 1 was used, and an adhesive film 2 having a length of 300 m was wound on the first core 3 by 250 m and on the second core 4 by 50 m. The tension during winding is 30 g.

  In Example 3, a double-core reel member 1 was used, and an adhesive film 2 having a length of 300 m was wound on the first core 3 by 200 m and on the second core 4 by 100 m. The tension during winding is 30 g.

  In Example 4, a double-core reel member 1 was used, and an adhesive film 2 having a length of 300 m was wound around the first core 3 by 100 m and the second core 4 by 200 m. The tension during winding is 30 g.

  In Example 5, a double-core reel member 1 was used, and an adhesive film 2 having a length of 600 m was wound around the first core 3 by 200 m and the second core 4 by 400 m. The tension during winding is 30 g.

  In Example 6, a double-core reel member 1 was used, and an adhesive film 2 having a length of 600 m was wound around the first core 3 by 150 m and around the second core 4 by 450 m. The tension during winding is 30 g.

  In Example 7, a double core reel member 1 was used, and an adhesive film 2 having a length of 600 m was wound around the first core 3 by 100 m and the second core 4 by 500 m. The tension during winding is 30 g.

  In Comparative Example 1, a 300 m long adhesive film 2 was wound using a single core reel member. The tension during winding is 30 g.

  In Comparative Example 2, a 600 m long adhesive film 2 was wound using a single core reel member. The tension during winding is 30 g.

  In comparative example 3. Using a single core reel member, the adhesive film 2 having a length of 600 m was wound with taper tension. The tension at the time of winding started from 30 g and decreased to 5 g by decreasing the tension by 5 g every time 100 m was wound.

  For the evaluation of protrusion, visually observe from the side of the transparent reel flange, ◎ when the protrusion is not confirmed, ○ when the protrusion of the level that is not connected between the layers of the wound film laminated is confirmed, When the protrusion of the level connected between the layers of the film winding body laminated | stacked was confirmed, it was set as x.

  For the evaluation of blocking, when the adhesive film 2 is unwound, the protruding binder resin adheres to the side surface of the reel flange so that normal unwinding cannot be performed. The case where blocking occurred was marked as x.

  The evaluation of winding deviation and drop-off was visually observed from the side of the transparent reel flange, ◎ when no winding deviation or dropping was confirmed, ◯ when only winding deviation was confirmed, and x when dropping was confirmed. .

The number of particles captured is counted with a metal microscope when the adhesive film 2 unwound from each reel member is connected to a 1300 μm ² bump formed on a glass substrate by hot pressing. Thus, the number of trapped particles was measured. The average number of traps was 20 pcs or more, ◎, 19-16 pcs was ◯, and 15 pcs or less was x. The results are shown in Table 1.

  As shown in Table 1, in Examples 1 to 7 using the double-core reel member 1, there is no practical problem even when the length of the adhesive film 2 is lengthened with ◎ or ○ in each evaluation item. I understand. On the other hand, in Comparative Examples 1 to 3, since a single core reel member was used, all of the problems occurred. That is, in Comparative Example 1, blocking occurred when the adhesive film 2 was unwound. Further, in Comparative Example 2, the protrusion and blocking occurred, and the binder resin layer flowed out, so that the number of particles captured on the bumps was reduced. In Comparative Example 3, since the tape was wound with a taper tension, the adhesive film 2 was detached from the wound body and could not be normally unwound.

  In each example, in Example 2, since the amount of winding on the first core 3 having a small diameter was relatively increased, a slight protrusion was observed, and the number of particles trapped was also slightly decreased. On the other hand, no protrusion was observed when the amount of winding on the large-diameter second core 4 was equal to or greater than the amount of winding on the first core 3.

  In Example 7, since 500 m of the adhesive film 2 having a length of 600 m was wound around the second core 4, a slight winding deviation was also observed in the second core 4.

DESCRIPTION OF SYMBOLS 1 Reel member, 2 Adhesive film, 3 1st winding core, 3a Engagement hole, 4 2nd winding core, 5 Reel flange, 5a Insertion hole, 7 Opening part, 8 Stopper plate, 9 Stopper step part, 20 Binder Resin layer, 20a binder, 21 release substrate, 22 conductive particles

Claims (14)

A first core around which an adhesive film including a binder resin layer and a support that supports the binder resin layer is wound;
A second cylindrical core disposed concentrically on the outer peripheral side of the first core and around which the adhesive film is wound;
A reel flange provided on one side or both sides of the first core and the second core;
The first core is capable of rotating independently of the second core in synchronization with rotation,
The second winding core is a reel member in which an opening through which the adhesive film is inserted is formed.   The reel member according to claim 1, wherein one adhesive film is inserted through the opening and wound around the first winding core, and further wound around the second winding core.   The adhesive film has a ratio (L1: L2) of the length L1 wound around the first core and the length L2 wound around the second core 5: 1 to 1: The reel member according to claim 2, wherein the reel member is 5.   The boundary region between the part wound around the first core and the part wound around the second core can be detected on the adhesive film. Reel member. The first core is rotatable independently of the reel flange;
The reel member according to claim 1, wherein the second winding core is provided integrally with the reel flange.   6. The adhesive film according to claim 1, wherein the adhesive film is a conductive adhesive film in which conductive particles are contained in the binder resin layer, or an insulating adhesive film in which conductive particles are not contained in the binder resin layer. The reel member according to item. A first core around which the adhesive film is wound;
A second cylindrical core disposed concentrically on the outer peripheral side of the first core and around which the adhesive film is wound;
A method of winding the adhesive film around a reel member comprising a reel flange provided on one side or both sides of the first core and the second core,
Insert the tip of one adhesive film through the opening provided in the second core,
The adhesive film is wound around the first core by rotating only the first core that is rotatable independently of the second core,
After the winding amount to the first winding core reaches a predetermined amount, the second winding core is rotated in the same direction in synchronization with the first winding core, and the adhesive film is moved to the second winding core. A method for winding an adhesive film wound around a core.   8. The adhesive film winding according to claim 7, wherein when the adhesive film is wound around the first core, the second core is rotated so that the opening corresponds to a winding position of the adhesive film. Times method.   The ratio (L1: L2) of the length L1 wound around the first core and the length L2 wound around the second core is 5: 1 to 1: The winding method of the adhesive film of Claim 7 wound so that it may become 5.   The adhesive film according to any one of claims 7 to 9, wherein the second winding core is provided integrally with the reel flange, and the second winding core is rotated by rotating the reel member. Winding method. The adhesive film is capable of detecting a boundary region between a part wound around the first core and a part wound around the second core,
The adhesive film according to any one of claims 7 to 10, wherein the rotation of only the first core and the rotation of the first and second cores are switched by detecting the boundary region. Winding method. A first core wound with an adhesive film;
A second cylindrical core disposed concentrically on the outer peripheral side of the first core and wound with the adhesive film;
A reel flange provided on one side or both sides of the first core and the second core, and the one adhesive film is inserted through the opening provided in the second core. An adhesive film unwinding method for unwinding the adhesive film from a reel member wound around the first core,
Unwinding the adhesive film wound around the second core by synchronously rotating the first core and the second core in the same direction;
After all of the adhesive film wound around the second core is unwound, only the first core that is rotatable independently of the second core is rotated, A method for unwinding an adhesive film for unwinding the adhesive film wound around the first core.   The unwinding of the adhesive film according to claim 12, wherein when unwinding the adhesive film from the first core, the second core is rotated so that the opening corresponds to the unwinding position of the adhesive film. Method. The adhesive film is capable of detecting a boundary region between a part wound around the first core and a part wound around the second core,
The method for unwinding an adhesive film according to claim 12 or 13, wherein the rotation of the first and second cores and the rotation of only the first core are switched by detecting the boundary region. .

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