JP2009149396A - Reel for adhesive tape - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reel for an adhesive tape capable of sufficiently suppressing the separation of a base of the adhesive tape from an adhesive layer during a winding process or a feed-out process of the adhesive tape. <P>SOLUTION: The adhesive tape 5 comprising the tape-like base 6 and the adhesive layer 8 formed on one-side surface of the base is winded around the reel 1 for the adhesive tape, and the base 6 is detached from the adhesive layer 8 when used. The reel equipped with a cylindrical winding core 3 for winding the adhesive tape 5 and a pair of side plates 2 provided on both ends in the axial direction of the winding core 3 so as to face each other has an elevated part 21 formed continuously or intermittently from peripheral edges 2b of inner surfaces 2a of the side plates 2 toward the direction of the center and having a surface roughness Ra of not more than 3.0 μm. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a tape-shaped substrate and an adhesive tape reel on which an adhesive tape having an adhesive layer provided on one surface thereof is wound and an adhesive tape is peeled off from the adhesive layer when used.

  An anisotropic conductive film (ACF) is used as a connection material for electrically connecting connected members having a large number of electrodes. Anisotropic conductive films maintain the electrical connection between opposing electrodes when connecting a semiconductor element such as an IC or LSI or a connected member such as a package to a substrate such as a printed wiring board, LCD glass substrate, or flexible printed circuit board. A connection material that performs electrical connection and mechanical fixation so as to maintain insulation between adjacent electrodes.

The anisotropic conductive film includes an adhesive component containing a thermosetting resin and conductive particles blended as necessary, and is formed in a film shape on a substrate such as a polyethylene terephthalate film (PET). An anisotropic conductive tape is produced by cutting an anisotropic conductive film having a film-like base material and an adhesive layer formed on one side thereof into a tape shape so as to have a width suitable for the application. The The anisotropic conductive tape cut to a predetermined width is wound on a reel (for example, see Patent Document 1). When using the anisotropic conductive tape, the substrate is peeled from the adhesive layer, and the adhesive layer is disposed between the connected members.
JP 2003-34468 A

  Incidentally, a reel on which an adhesive tape such as an anisotropic conductive tape is wound generally includes a winding core and a side plate for preventing collapse. Conventionally, in the process of winding the adhesive tape around the reel, if the adhesive layer or base material of the adhesive tape comes into contact with the side plate of the reel, the base material is peeled off from the adhesive layer, and the efficiency of the winding operation of the adhesive tape is reduced. There was a case where trouble occurred.

  In addition, when using the adhesive tape, the tape-shaped substrate is finally peeled off, but in the process of unwinding the adhesive tape from the reel, etc., in order to prevent dust and the like from adhering to the adhesive layer, In some cases, the state in which the base material is adhered to the adhesive layer is maintained. However, if the adhesive component of the adhesive tape adheres to the side plate, the substrate may peel from the adhesive layer when the adhesive tape is unwound.

  The present invention has been made in view of such circumstances, and for adhesive tapes that can sufficiently prevent the base material of the adhesive tape from peeling from the adhesive layer in the winding process and unwinding process of the adhesive tape. The purpose is to provide reels.

  The reel for adhesive tape of the present invention has a tape-shaped substrate and an adhesive layer provided on one surface thereof, and is wound with an adhesive tape that peels the substrate from the adhesive layer when used. A cylindrical core for winding the adhesive tape, and a pair of side plates provided at opposite ends of the core in the axial direction so that at least one of the pair of side plates is wound. On the surface on the core side, there is a first raised portion that is provided continuously or intermittently from the peripheral edge of the side plate toward the center and has a surface roughness Ra of 3.0 μm or less.

  In the adhesive tape reel of the present invention, it is possible to prevent the side surface of the adhesive tape from adhering to the side plate by providing the first raised portion on the core side surface of the side plate. Therefore, it can fully suppress that a base material peels from an adhesive bond layer at the time of winding up and unwinding of an adhesive tape. In addition, since the surface roughness Ra of the first raised portion is extremely smooth such that the surface roughness Ra is 3.0 μm or less, the peeling of the substrate is more reliably suppressed as compared with the case where the surface roughness Ra exceeds 3.0 μm. it can.

  In the adhesive tape reel of the present invention, it is preferable that both of the pair of side plates have the first raised portion. Moreover, it is preferable that at least one of the pair of side plates is provided with a plurality of first raised portions radially from the central portion to the peripheral portion of the side plate. By adopting these configurations, the effects of the present invention are more reliably exhibited.

  It is preferable that the 1st protruding part is the following structures. That is, the height of the first raised portion from the surface on which the first raised portion is provided is preferably 0.05 to 1.00 mm, and the width is 0.5 to 20.0 mm. Is preferred. In the present invention, the width of the raised portion means that the distance from one end of the raised portion to the other end in the direction perpendicular to the extending direction of the raised portion when the raised portion is formed in a straight line. This means that when the bulging portion is formed in a curved shape, it means the distance from one end of the bulging portion to the other end in a direction perpendicular to the tangential direction of the point where the bulging portion is located.

  In the adhesive tape reel of the present invention, the side plate having the first raised portion is provided continuously or intermittently along the peripheral edge of the side plate on the surface on which the first raised portion is provided. It is preferable to further have a second raised portion having a surface roughness Ra of 3.0 μm or less. By adopting such a configuration, even if the side surface of the adhesive tape is brought into contact with the peripheral portion of the side plate and the adhesive tape is wound up by guiding the adhesive tape at the peripheral portion of the side plate, the adhesive tape is applied to the peripheral portion of the side plate. Can be sufficiently prevented from adhering. In addition, by winding the adhesive tape on the reel by the above method, the occurrence of winding unevenness can be sufficiently prevented.

  In addition, by setting the surface roughness Ra of the second raised portion to 3.0 μm or less, even when the adhesive tape comes into contact with the peripheral edge of the side plate during winding or unwinding of the adhesive tape, the base material is an adhesive. Peeling from the layer can be further suppressed.

  In the adhesive tape reel of the present invention, it is preferable that the second raised portion is provided continuously over the entire periphery of the peripheral edge of the side plate. Furthermore, it is preferable that a 2nd protruding part has a circular-arc-shaped surrounding surface in a contact position with an adhesive tape. By adopting these configurations, even when the adhesive tape comes into contact with the adhesive tape during winding or unwinding, it is possible to further reliably prevent the base material from peeling from the adhesive layer.

  It is preferable that the 2nd protruding part is the following structures. That is, the height of the second raised portion from the surface on which the second raised portion is provided is preferably 0.05 to 1.00 mm, and the width is 0.5 to 20.0 mm. Is preferred.

  Preferable specific examples of the adhesive tape wound on the adhesive tape reel of the present invention include an anisotropic conductive tape having a tape-like substrate and an adhesive layer provided on one surface thereof.

  ADVANTAGE OF THE INVENTION According to this invention, it can fully suppress that the base material of an adhesive tape peels from an adhesive bond layer in the winding-up process and unwinding process of an adhesive tape.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant descriptions are omitted. For the convenience of the drawings, the dimensional ratios in the drawings do not necessarily match those described.

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

  Prior to the description of the adhesive tape reel according to the present embodiment, the anisotropic conductive tape 5 wound around the reel will be described. FIG. 1 is a view showing a cross section perpendicular to the longitudinal direction of the anisotropic conductive tape 5. This anisotropic conductive tape 5 has a base material 6 and an adhesive layer 8 provided on one surface thereof.

  The substrate 6 has a tape shape. The substrate 6 has a length of about 1 to 200 m, a thickness of about 4 to 200 μm, and a width of about 0.5 to 30 mm. The length, thickness, and width of the substrate 6 are not limited to the above ranges. In addition, it is preferable that the width | variety of the base material 6 is wider than the width | variety of the adhesive bond layer 8 attached on it.

  The substrate 6 is, for example, polyethylene terephthalate, polyethylene naphthalate, polyethylene isophthalate, polybutylene terephthalate, polyolefin, polyacetate, polycarbonate, polyphenylene sulfide, polyamide, ethylene / vinyl acetate copolymer, polyvinyl chloride, polyvinylidene chloride, Various tapes made of synthetic rubber or liquid crystal polymer can be used. But the material which comprises the base material 6 is not limited to these. Moreover, you may use as the base material 6 what the mold release process was performed to the contact surface etc. with the adhesive bond layer 8. FIG.

  The adhesive layer 8 is made of an adhesive composition, and the adhesive composition contains an adhesive component 8a and conductive particles 8b. The thickness of the adhesive layer 8 may be appropriately selected according to the adhesive component to be used, the type of the adherend, and the like, but is preferably 5 to 100 μm. Moreover, what is necessary is just to adjust the width | variety of the adhesive bond layer 8 according to a use application, but generally it is about 0.5-5 mm.

  As the adhesive component 8a of the adhesive layer 8, a material that exhibits curability by heat or light can be widely applied. The use of a crosslinkable material is preferred because of excellent heat resistance and moisture resistance after connection. Among these, an epoxy adhesive containing an epoxy resin as a main component as a thermosetting resin is preferable because it can be cured for a short time, has good connection workability, and has excellent molecular adhesion.

  Epoxy adhesives are, for example, high molecular weight epoxy, solid epoxy or liquid epoxy, or those mainly composed of epoxy modified with urethane, polyester, acrylic rubber, nitrile rubber (NBR), synthetic linear polyamide or the like. Can be used. The epoxy adhesive is generally obtained by adding a curing agent, a catalyst, a coupling agent, a filler, or the like to the above-mentioned epoxy which is a main component.

  The conductive particles 8b are dispersed in the adhesive component 8a. Examples of the conductive particles 8b include metal particles such as Au, Ag, Pt, Ni, Cu, W, Sb, Sn, and solder, and carbon particles. Alternatively, coated particles in which non-conductive glass, ceramic, plastic, or the like is used as a core and the core is coated with the above metal or carbon may be used. The average particle diameter of the conductive particles 8b is preferably 1 to 18 μm from the viewpoint of dispersibility and conductivity. Insulating coating particles obtained by coating conductive particles with an insulating layer may be used, and conductive particles and insulating particles may be used in combination from the viewpoint of improving the insulation between adjacent electrodes.

  The blending ratio of the conductive particles 8b is preferably 0.1 to 30 parts by volume and more preferably 0.1 to 10 parts by volume with respect to 100 parts by volume of the adhesive component contained in the adhesive layer 8. preferable. If the blending ratio is less than 0.1 part by volume, the connection resistance between the opposing electrodes tends to be high, and if it exceeds 30 parts by volume, a short circuit between adjacent electrodes tends to occur.

  Next, the adhesive tape reel according to the present embodiment will be described. Fig.2 (a) is a side view of the reel for adhesive tapes concerning this embodiment, FIG.2 (b) is sectional drawing in the AA shown in Fig.2 (a).

  A reel (adhesive tape reel) 1 shown in FIG. 2 is opposed to a cylindrical core 3 for winding an anisotropic conductive tape (adhesive tape) 5 and both ends of the core 3 in the axial direction. And a pair of side plates 2. Further, a shaft hole 4 for inserting a rotating shaft of a winding device (not shown) is provided at the center of the side plate 2. The shaft hole 4 has a D-shaped cross section. When the rotary shaft is driven in a state in which the reel 1 is mounted on the rotary shaft of the winding device, the reel 1 rotates without spinning.

  The reel 1 having the above structure winds an anisotropic conductive film 5 having a film-like base material and an anisotropic conductive film having an adhesive layer provided on one surface of the reel 1 while cutting it into a thin tape. It is used when manufacturing and supplying. The length in the axial direction of the core 3, in other words, the distance between the pair of side plates 2 separated via the core 3 can be appropriately set according to the width of the anisotropic conductive tape 5. Moreover, it is preferable that the shape of the side plate 2 is a disk shape, and the diameter is appropriately set according to the length of the anisotropic conductive tape 5 to be wound (the diameter of the wound body of the anisotropic conductive tape 5). it can.

  The reel 1 may be integrally formed with a pair of side plates 2 and a core 3 by injection molding or the like, and the pair of side plates 2 and the core 3 are separately formed, and these are fitted and bonded together. The reel 1 may be configured. When the side plate 2 and the winding core 3 are separated from each other, the side plate 2 having a diameter suitable for the length of the anisotropic conductive tape 5 to be wound is appropriately adopted, or suitable for the width of the anisotropic conductive tape 5. There is an advantage that the winding core 3 having a certain length can be appropriately adopted.

  As shown in FIG. 2B, the pair of side plates 2 of the reel 1 has a plurality of first raised portions 21 provided radially from the joint portion with the core 3 on the inner side surface 2a toward the peripheral portion 2b. Respectively. The inner side surface 2 a of the side plate 2 is a surface of the side plate 2 on the core 3 side.

  FIG. 3 is an end view taken along line BB shown in FIG. By providing the first raised portion 21 on the inner side surface 2a of the side plate 2, the following effects are exhibited. That is, when the anisotropic conductive tape 5 is wound on the reel 1 or stored in the state of being wound on the reel 1, the side surface of the wound body of the anisotropic conductive tape 5 and the inner surface 2a of the side plate 2 are in contact with each other. The area can be made sufficiently small, and the adhesive component 8a of the adhesive layer 8 exposed on the side surface of the wound body can be sufficiently prevented from adhering to the inner side surface 2a.

  Note that the distance between the pair of side plates 2 provided at both ends of the core 3 is the width of the anisotropic conductive tape 5 so that the side surface of the anisotropic conductive tape 5 to be wound does not contact the inner side surface 2a of the side plate 2. Accordingly, it is set with a certain margin. However, at the time of winding the anisotropic conductive tape 5, the winding position of the anisotropic conductive tape 5 is biased due to the rotation of the reel 1, and the side surface of the anisotropic conductive tape 5 is inside the side plate 2. The side surface 2a may be contacted. Further, even after the anisotropic conductive tape 5 is wound around the reel 1, the anisotropic conductive tape 5 may be displaced due to impact or vibration during transportation. Then, the anisotropic conductive tape 5 may come into contact with the inner surface of the side plate portion 2. Even in such a case, by providing the first raised portion 21 on the inner side surface 2 a of the side plate 2, it is sufficient that the adhesive component 8 a of the anisotropic conductive tape 5 adheres to the inner side surface 2 a of the side plate 2. Can be suppressed.

  As for the 1st protruding part 21, it is preferable that the height h1 from the inner surface 2a of the side plate 2 is 0.05-1.00 mm, It is more preferable that it is 0.05-0.30 mm, 0.05 More preferably, it is -0.20 mm (refer FIG. 3).

  If the height h1 of the first raised portion 21 is less than 0.05 mm, the contact area between the side surface of the anisotropic conductive tape 5 and the inner side surface 2a of the side plate 2 tends to be insufficient. On the other hand, if the height h1 of the first raised portion 21 exceeds 1.00 mm, the width of the reel 1 tends to become unnecessarily large. Further, the first raised portion 21 is easily marked on the side surface of the adhesive layer 8 of the anisotropic conductive tape 5.

  The width w1 of the first raised portion 21 is preferably 0.5 to 20.0 mm, more preferably 0.5 to 10.0 mm, and still more preferably 0.5 to 5.0 mm. (See FIG. 3).

  If the width w1 of the first raised portion 21 is less than 0.5 mm, the side surface of the adhesive layer 8 of the anisotropic conductive tape 5 is likely to be damaged. On the other hand, when the width w1 of the first raised portion 21 exceeds 20.0 mm, the adhesive component 8a of the anisotropic conductive tape 5 tends to adhere to the first raised portion 21.

  The surface roughness Ra of the first raised portion 21 is 3.0 μm or less, preferably 2.0 μm or less, and more preferably 1.5 μm or less. If the surface roughness of the first raised portion 21 is larger than 3.0 μm, the anisotropic conductive tape 5 and the first conductive tape 5 are unwound when the anisotropic conductive tape 5 is wound around the reel 1 or unwound from the reel 1. When the ridges 21 come into contact with each other, there arises a problem that the substrate 6 is easily peeled off from the adhesive layer 8.

  In addition to the first raised portion 21, the pair of side plates 2 of the reel 1 according to the present embodiment has a second raised portion provided on the peripheral edge 2b of the inner side surface 2a as shown in FIG. Each has a portion 22.

  FIG. 4 is an end view taken along line CC shown in FIG. By providing the second raised portion 21 on the inner side surface 2a of the side plate 2, the following effects are exhibited. That is, as shown in FIG. 5A, the anisotropic conductive tape 5 is slightly tilted so that the side surface of the anisotropic conductive tape 5 is brought into contact with the peripheral portion 2b of the side plate 2, and the anisotropic conductive material is formed at the peripheral portion 2b of the side plate 2. Even if the anisotropic conductive tape 5 is wound around the reel 1 so as to guide the tape 5, it is possible to sufficiently prevent the adhesive component 8 a of the anisotropic conductive tape 5 from adhering to the peripheral edge 2 b of the side plate 2. By winding the anisotropic conductive tape 5 on the reel 1 by the above method, there is an advantage that the occurrence of uneven winding can be sufficiently prevented. Note that the anisotropic conductive tape 5 is wound around the reel 1 by rotating the reel 1 in the direction of the arrow shown in FIG.

  Further, by providing the second raised portion 22 on the inner side surface 2 a of the side plate 2, the adhesive exposed on the side surface of the anisotropic conductive tape 5 when the anisotropic conductive tape 5 is wound around the reel 1 as described above. The portion in contact with the agent layer 8 can be limited only to the vicinity of the top of the second raised portion 22, and there is an advantage that the adhesive component 8a of the anisotropic conductive tape 5 can be sufficiently prevented from adhering to the inner side surface 2a. . That is, during the winding operation of the anisotropic conductive tape 5, the contact area between the inner surface 2 a of the side plate 2 and the anisotropic conductive tape 5 can be made sufficiently small, and the adhesive component 8 a of the anisotropic conductive tape 5 is attached to the side plate 2. Adhesion can be sufficiently prevented.

  From the viewpoint of surely achieving the above effect, the second raised portion 22 preferably has an arcuate peripheral surface 22 a at the contact position with the anisotropic conductive tape 5. The radius of curvature of the peripheral surface 22a is preferably 0.3 to 1.5 mm from the viewpoint of sufficiently reducing the contact area between the anisotropic conductive tape 5 and the side plate 2, and is 0.5 to 1.0 mm. Preferably there is.

  The height 2 of the second raised portion 22 from the inner side surface 2a of the side plate 2 is preferably 0.05 to 1.00 mm, more preferably 0.05 to 0.30 mm, 0.05 More preferably, it is -0.20 mm (refer FIG. 4).

  If the height h2 of the second raised portion 22 is less than 0.05 mm, the contact area between the side surface of the anisotropic conductive tape 5 and the inner side surface 2a of the side plate 2 tends to be insufficient. Further, when the anisotropic conductive tape 5 is wound, the first raised portion 21 and the anisotropic conductive tape 5 come into contact with each other, and the anisotropic conductive tape 5 tends to be easily damaged. On the other hand, when the height h2 of the second raised portion 22 exceeds 1.00 mm, the anisotropic conductive tape 5 tends to be damaged by the second raised portion 22 when the anisotropic conductive tape 5 is wound. is there. In addition to this, the gap between the side surface of the wound body of the anisotropic conductive tape 5 and the inner side surface 2a of the side plate portion 2 tends to be large, and the storage stability tends to be lowered such that the winding is liable to occur during storage. There is.

  The width w2 of the second raised portion 22 is preferably 0.5 to 20.0 mm, more preferably 0.5 to 10.0 mm, and preferably 0.5 to 5.0 mm. Further preferred (see FIG. 4).

  If the width w2 of the second raised portion 22 is less than 0.5 mm, the side surface of the adhesive layer of the anisotropic conductive tape 5 is likely to be damaged. On the other hand, when the width w2 of the second raised portion 22 exceeds 20.0 mm, the adhesive component 8a of the anisotropic conductive tape 5 tends to adhere to the second raised portion 22. Further, when the anisotropic conductive tape 5 wound around the reel 1 is unwound, the anisotropic conductive tape 5 is easily caught by the second raised portion 22.

  The surface roughness Ra of the second raised portion 22 is preferably 3.0 μm or less, more preferably 2.0 μm or less, and even more preferably 1.5 μm or less. When the surface roughness of the second raised portion 22 is larger than 3.0 μm, the anisotropic conductive tape 5 and the second raised portion 22 come into contact with each other when the anisotropic conductive tape 5 is unwound from the reel 1. In addition, the base material 6 is easily peeled off from the adhesive layer 8 of the anisotropic conductive tape 5.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment. The present invention can be variously modified without departing from the gist thereof.

  For example, in the above-described embodiment, the reel 1 in which both the pair of side plate portions 2 have the first raised portion 21 and the second raised portion 22 has been exemplified. However, the reel for adhesive tape according to the present invention has a pair of reels. Of the side plate portions 2, only one side plate 2 may have the first raised portion 21 and the second raised portion 22. For example, if the anisotropic conductive tape 5 is taken up toward one side plate 2 and a margin is provided between the other side plate 2 and the anisotropic conductive tape 5, only the one side plate 2 has the first bulge. The portion 21 and the second raised portion 22 may be provided. Further, when the anisotropic conductive tape 5 is wound around the reel 1 and the method of guiding the anisotropic conductive tape 5 with the peripheral edge 2b of the side plate 2 is not adopted, the second raised portion 22 is not necessarily provided. Also good.

  The adhesive tape effective to be wound on the adhesive tape reel according to the present invention is not limited to the anisotropic conductive tape 5. What is necessary is just an adhesive tape which has an adhesive layer provided on the tape-like base material and the one surface peeled at the time of use, for example, a photosensitive resin layer provided on the tape-like base material and the surface The reel 1 may be used for winding up a photosensitive element or the like.

  In the said embodiment, although the 1st protruding part 21 formed continuously toward the peripheral part 2b from the junction part with the core 3 in the inner surface 2a of the side plate 2 was illustrated, the 1st protruding part 21 is illustrated. May be formed intermittently (see FIG. 6A). Moreover, the 1st protruding part 21 should just extend toward the direction of the center part of the side plate 2 from the peripheral part 2b of the side plate 2 for the purpose, and is formed so that the radial direction of the side plate 2 may be crossed. It may be formed (see FIG. 6B), or may be formed in a curved shape instead of a linear shape (see FIG. 6C).

  The cross-sectional shape of the first raised portion 21 is not limited to the arc shape as shown in FIG. 3, and various shapes such as a rectangular shape or a chamfered corner portion can be adopted. Moreover, the number and shape of the 1st protruding part 21 will not be specifically limited if it is an aspect which can prevent effectively adhesion of the adhesive component to the inner surface 2a of the reel 1 (refer FIG. 7).

  Similar to the first raised portion 21, the cross-sectional shape of the second raised portion 22 is not limited to the arc shape as shown in FIG. 4, and various shapes such as a rectangular shape or a shape with chamfered corners thereof. (For example, see FIGS. 7B, 7C, 7F, and 7G).

  The second raised portion 22 is not necessarily provided over the entire circumference of the peripheral edge 2b of the side plate 2, and may be provided intermittently along the peripheral edge 2b of the side plate 2 (FIG. 8A). )), Or a curved shape (see FIG. 8B). A plurality of second raised portions 22 may be arranged along the peripheral edge 2b of the side plate 2 (see FIG. 8C). Moreover, as shown to Fig.9 (a)-(c), you may make the 2nd protruding part 22 and the 1st protruding part 21 which were provided intermittently continue.

  In the above embodiment, the reel 1 having the shaft hole 4 having a D-shaped cross section is illustrated, but the shape of the shaft hole 4 can be appropriately changed according to the shape of the rotating shaft of the winding device. . In the above embodiment, the configuration of the core 3 has not been described in detail, but a conventionally known configuration related to this type of reel, such as providing a rib for securing rigidity, may be applied.

  The present invention will be described in more detail with reference to examples and comparative examples, but the present invention is not limited to the following examples.

Example 1
An adhesive tape reel having the same configuration as the reel 1 shown in FIG. 2 was produced by injection molding. Table 1 shows data (height, width, and surface roughness Ra) for the first raised portion and the second raised portion. In addition, the cross section perpendicular | vertical to the extending direction of a 1st protruding part and a 2nd protruding part was circular arc shape. Table 1 also shows data on the side plates of the adhesive tape reel and the anisotropic conductive tape wound around the adhesive tape reel.

(Measurement of surface roughness Ra of the raised portion)
The surface roughness Ra of the first and second raised portions is a laser surface roughness meter (trade name: LT9000, manufactured by Keyence Corporation) as a sensor in the high-speed three-dimensional shape measurement system MAP-3D (trade name, manufactured by Combs). It measured using the apparatus which combined. More specifically, for a region having a width of 5 mm including the first raised portion, that is, a region from an intermediate point of the width w1 of the first raised portion to a point 2.5 mm away in the width direction of the raised portion, The surface roughness Ra measured so as to cross the first raised portion was defined as the surface roughness Ra of the first raised portion. On the other hand, the surface roughness Ra measured for the region from the midpoint of the width w2 of the second raised portion to a point 2.5 mm away in the center direction of the side plate was taken as the surface roughness Ra of the second raised portion.

(Example 2)
An adhesive tape reel having the same configuration as in Example 1 was prepared, except that the surface roughness Ra of the first and second raised parts was 1.16 μm, and the same as in Example 1. The anisotropic conductive tape of the structure of was wound up.

(Comparative Example 1)
The first raised portion and the second raised portion are the sizes shown in the column of Comparative Example 1 in Table 2 and are the same as in Example 1 except that the cross section perpendicular to the extending direction is substantially rectangular. The reel for adhesive tapes having the structure described above was produced, and the anisotropic conductive tape having the same structure as that of Example 1 was wound up.

(Comparative Example 2)
The first raised portion and the second raised portion are the sizes shown in the column of Comparative Example 2 in Table 2, and the same as Example 1 except that the cross section perpendicular to the extending direction is substantially rectangular. A reel for adhesive tape having the structure described above was produced, and an anisotropic conductive tape having the same structure as in Example 1 was wound up.

(Evaluation of adhesive peeling)
The anisotropic conductive tape was pulled out from the reels according to Examples 1 and 2 and Comparative Examples 1 and 2, and the presence or absence of peeling of the base material from the adhesive layer was visually confirmed. The results are shown in Table 3.

It is sectional drawing which shows the one aspect | mode of the anisotropic conductive tape suitable for winding up on the reel for adhesive tapes concerning this invention. (A) is a front view which shows one Embodiment of the reel for adhesive tapes concerning this invention, (b) is sectional drawing in the AA line shown to Fig.2 (a). It is an end view in the BB line shown in Drawing 2 (b). It is an end elevation in CC line shown in Drawing 2 (b). (A) is a side view which shows the state by which the adhesive tape is wound up by the reel, (b) is the front view. (A)-(c) is a front view which shows the aspect of the side plate of the reel for adhesive tapes concerning this invention, respectively. (A)-(g) is sectional drawing which each shows the aspect of the 1st or 2nd protruding part of the reel for adhesive tapes concerning this invention. (A)-(c) is the schematic which each shows the aspect of a 2nd protruding part. (A)-(c) is a front view which shows the aspect of the side plate which comprises the 1st and 2nd protruding part, respectively.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Reel (reel for adhesive tape), 2 ... Side plate, 3 ... Core, 4 ... Shaft hole, 5 ... Anisotropic conductive tape (adhesive tape), 6 ... Base material, 8 ... Adhesive layer, 8a ... Adhesive Component, 8b ... conductive particles, 21 ... first ridge, 22 ... second ridge.

Claims (11)

It has an adhesive layer provided on a tape-like base material and one surface thereof, and is an adhesive tape reel on which an adhesive tape is peeled off from the adhesive layer when used,
A cylindrical core for winding the adhesive tape;
A pair of side plates provided at opposite ends of the core in the axial direction so as to face each other;
With
At least one of the pair of side plates is provided on the surface on the core side continuously or intermittently from the peripheral edge to the center of the side plate and has a surface roughness Ra of 3.0 μm or less. An adhesive tape reel having one raised portion.   The reel for adhesive tapes according to claim 1, wherein both of the pair of side plates have the first raised portion.   3. The adhesive tape reel according to claim 1, wherein at least one of the pair of side plates is provided with a plurality of the first raised portions radially from a central portion to a peripheral portion of the side plates.   The adhesive tape according to any one of claims 1 to 3, wherein the first raised portion has a height from a surface provided with the first raised portion of 0.05 to 1.00 mm. reel.   The reel for adhesive tapes as described in any one of Claims 1-4 whose width | variety of a said 1st protruding part is 0.5-20.0 mm.   The side plate having the first raised portion is provided continuously or intermittently along the peripheral edge of the side plate on the surface provided with the first raised portion, and the surface roughness Ra is 3.0 μm or less. The reel for adhesive tapes as described in any one of Claims 1-5 which further has the 2nd protruding part.   The reel for adhesive tape according to claim 6, wherein the second raised portion is provided continuously over the entire periphery of the peripheral edge of the side plate.   The said 2nd protruding part is a reel for adhesive tapes of Claim 6 or 7 whose height from the surface in which the said 2nd protruding part was provided is 0.05-1.00 mm.   The reel for adhesive tapes as described in any one of Claims 6-8 whose width | variety of a said 2nd protruding part is 0.5-20.0 mm.   The reel for adhesive tapes as described in any one of Claims 6-9 in which a said 2nd protruding part has an arc-shaped surrounding surface in a contact position with the said adhesive tape.   The reel for adhesive tapes as described in any one of Claims 1-10 whose said adhesive tape is an anisotropic conductive tape.

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