JP2014037315A - Reel for adhesive tape and tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reel for an adhesive tape capable of preventing the occurrence of blocking caused when the adhesive tape is pulled out from the reel, and to provide the tape.SOLUTION: In a reel 1 for an adhesive tape, on an inner side surface 3a of a pair of side plates 3, 3 which are provided at both end parts of a winding core 2 facing each other, patterns, which are formed by dents dented from the inner side surfaces, are formed. This structure suppresses adhering of an adhesive of the adhesive tape 5 to the inner side surface 3a of the side plates 3.

Description

  The present invention relates to an adhesive tape reel and a tape.

  Conventionally, an adhesive tape for connecting connected members having a large number of electrodes has been used. Examples of such adhesive tape include anisotropic conductive tape and conductive tape. Anisotropic conductive tape, for example, when a semiconductor element such as an IC or LSI is connected to a substrate such as a printed wiring board, a glass substrate for LCD, or a flexible printed board, makes the electrodes of opposing connection members conductive and adjacent to each other. The insulation state between the electrodes can be maintained. Moreover, when connecting a soldered copper wire to a photovoltaic cell, for example, the conductive tape can electrically connect opposing electrodes.

  The adhesive tape has an adhesive layer containing an adhesive component containing, for example, a thermosetting resin and conductive particles blended as necessary, on a substrate such as a polyethylene terephthalate film (PET). It is. The adhesive tape is produced by cutting a sheet-shaped raw fabric into a long shape with a width (for example, about several mm or less) according to the application, and is stored, transported or used in a state of being wound around a reel (for example, Patent Document 1). reference).

  The reel on which the adhesive tape is wound includes, for example, a winding core and a pair of disk-shaped side plates disposed on both sides of the winding core. Such a reel for adhesive tape is provided with a core on one side plate, and is assembled on the side surface of the core by a plurality of fixing portions that are provided apart from each other around the core of the core.

JP 2003-34468 A

  However, if the adhesive tape is stored, transported or used while being wound around the reel, the inner side surface of the reel side plate and the side surface of the adhesive tape may come into contact with each other, and the adhesive tape adhesive may be applied to the inner side surface of the reel side plate. Easy to adhere.

  In addition, since the adhesive of the adhesive tape becomes soft at 30 ° C. or higher, the adhesive adheres to the inner side surface of the side plate of the reel, and when the adhesive tape is pulled out from the reel, the adhesive is peeled off from the base material. Sometimes occurred. When the blocking phenomenon occurs, it becomes difficult to attach the part where the adhesive is peeled off to the electrode of the connection member. Further, when the adhesive tape is pulled out from the reel while the peeled adhesive is attached to the inner surface of the reel, blocking continues to occur. For this reason, the adhesive tape inside the part where the adhesive is peeled off may not be used.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an adhesive tape reel and tape that can prevent the occurrence of blocking when the adhesive tape is pulled out of the reel.

  In order to solve the above-described problems, an adhesive tape reel according to the present invention includes a winding core around which an adhesive tape can be wound, and a pair of side plates provided on both ends of the winding core so as to face each other. On the inner side surface of the side plate, a pattern is formed by a depression recessed from the inner side surface. This pattern can be formed by embossing.

  In the reel for an adhesive tape according to the present invention, a pattern due to a depression is formed on the inner side surfaces of the pair of side plates. Thus, the contact area between the inner side surface of the side plate of the reel and the side surface of the adhesive tape is reduced, and adhesion of the adhesive of the adhesive tape to the inner surface of the side plate of the reel can be suppressed. Therefore, it is possible to prevent blocking when the adhesive tape is pulled out from the reel.

  The pattern can be formed on the entire inner surface. Further, the pattern can be uniformly formed on the entire inner surface. Thereby, since a contact area becomes small irrespective of the winding position of an adhesive tape, it can further suppress that the adhesive agent of an adhesive tape adheres to the inner surface of the side plate of a reel.

  The distance between the pair of side plates is larger than the width of the adhesive tape, and the depth of the pattern recess is 5% or more and 50% or less of the length obtained by subtracting the width of the adhesive tape from the distance between the pair of side plates. Can be. It can suppress that an adhesive tape penetrates into a hollow as the said ratio is 5% or more and 50% or less. Therefore, the depression depth is 5% or more and 50% or less of the length obtained by subtracting the width of the adhesive tape from the distance between the pair of side plates, while suppressing the adhesive tape adhesive from adhering to the reel side plate. The adhesive tape can be wound smoothly.

  The recess depth can be 0.2% or more and 20% or less of the thickness of the side plate. When the depth of the depression is 0.2% or more, the contact area between the inner side surface of the reel side plate and the side surface of the adhesive tape is reduced, and the adhesive tape adhesive adheres to the inner side surface of the reel side plate. Can be suppressed. The intensity | strength of the side plate of a reel is securable that the said hollow depth is 20% or less.

  The depth of the hollow portion can be 0.01 mm or more and 0.10 mm or less. It can suppress that an adhesive tape penetrates into a hollow and the adhesive agent adheres to a hollow as the said hollow depth is 0.01 mm or more. Generally, since the thickness of the side plate is 0.5 mm to 5.0 mm, the strength of the side plate of the reel can be ensured when the depth of the recess is 0.10 mm or less.

  The area of the inner surface excluding the recessed portion on the inner surface can be 5% or more and 40% or less of the entire area of the inner surface including the recessed portion as viewed from the inside of the side plate. When the area of the inner surface excluding the recessed portion on the inner surface is 5% or more of the total area of the inner surface including the recessed portion, the contact area between the inner surface of the reel side plate and the side surface of the adhesive tape is reduced, It can suppress that the adhesive agent of an adhesive tape adheres to the inner surface of the side plate of a reel. The strength of the side plate of the reel can be ensured when the area of the inner surface excluding the recessed portion on the inner surface is 40% or less of the total area of the inner surface including the recessed portion.

  The distance between adjacent depressions can be 0.01 mm or more and 1 mm or less. When the distance is 0.01 mm or more, it is possible to prevent the adhesive tape from entering the recess and the adhesive from adhering to the recess. If the distance is 1 mm or less, the distance at which the adhesive tape continuously contacts the side plate is shortened, so that the adhesive tape can be firmly supported by the side plate.

  The dent depth can be shallower on the peripheral side than on the center side of the inner surface. The distance between the side plates tends to increase from the center side toward the peripheral side of the side plate. For this reason, when the depth of the recess is the same on the center side and the peripheral side, the inner side surface of the reel side plate and the side surface of the adhesive tape are more easily contacted on the central side, and on the peripheral side, the side plate of the reel It becomes difficult for the inner surface and the side surface of the adhesive tape to come into contact with each other. Therefore, since the influence of the penetration of the adhesive tape into the dent becomes smaller toward the peripheral side, if the dent depth on the peripheral side is shallower than the dent depth on the center side of the inner surface, the wrapping position of the adhesive tape is related. Accordingly, the blocking prevention effect becomes uniform, and the adhesive tape can be wound under uniform conditions regardless of the winding position.

  The pattern may consist of at least one of pear texture, geometric pattern, leather, wood grain, rock grain and sand grain. By setting it as such a pattern, the above dents can be formed without deteriorating the design.

  Moreover, the tape of this invention is equipped with the reel for adhesive tapes, and the adhesive tape wound around the core of the reel for adhesive tapes. As a result, the same effect as described above can be obtained.

  ADVANTAGE OF THE INVENTION According to this invention, the reel and tape for adhesive tapes which can prevent generation | occurrence | production of the blocking at the time of pulling out the adhesive tape from a reel can be provided.

1 is a perspective view showing an embodiment of an adhesive tape reel according to the present invention. It is a front view which shows the inner surface of the side plate of the reel for adhesive tapes concerning this embodiment. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1. In FIG. 3, it is the figure which showed only the side plate and expanded. It is the figure which expanded the inner surface of the side plate. It is a figure which shows the modification of the planar shape of a hollow.

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

  FIG. 1 is a perspective view showing an embodiment of an adhesive tape reel according to the present invention. FIG. 2 is a front view showing the inner side surface of the side plate of the adhesive tape reel according to the present invention.

  As shown in FIGS. 1 and 2, the reel 1 for adhesive tape in the present embodiment is opposed to each other so that the cylindrical core 2 around which the adhesive tape 5 is wound and the core 2 is sandwiched between both ends of the core 2. And a pair of side plates 3 and 3 provided. The reel 1 for adhesive tape prevents the collapse of the adhesive tape 5 by the cooperation of the pair of side plates 3 and 3 and is used when the adhesive tape 5 is manufactured, supplied, and stored. The tape 10 in this embodiment includes an adhesive tape reel 1 and an adhesive tape 5 wound around the core 2 of the adhesive tape reel 1.

  The winding core 2 is a portion around which the adhesive tape 5 is wound, and the axial length of the winding core 2 is appropriately set according to the width of the adhesive tape 5 so as to be slightly longer than the width of the adhesive tape 5. ing. Further, a shaft hole 4 into which a rotating shaft of a winding device or a feeding device (not shown) is inserted is provided at the center of the core 2. The shaft hole 4 has a circular cross section, for example, and when the rotary shaft is driven in a state where the rotary shaft of the winding device or the feeding device is inserted into the shaft hole 4, the reel 1 for adhesive tape rotates without spinning. It is supposed to be. The winding core 2 is made of plastic, for example, and has a cylindrical shape with a thickness similar to the width of the adhesive tape 5.

FIG. 3 is a cross-sectional view taken along line III-III in FIG. As shown in FIGS. 1-3, the side plate 3 consists of plastics, for example, and has comprised the disk shape. A distance W ₁ between the side plates 3 and 3 separated via the winding core 2 is appropriately set according to the width of the adhesive tape 5 so as to be slightly wider than the width of the adhesive tape 5. Since the distance W ₁ between the side plates 3 and 3 tends to increase toward the peripheral side 3b of the side plate 3, the distance W ₁ between the side plates 3 and 3 here is defined by a measured value near the core. doing. Usually, the distance W ₁ between the side plates 3 and 3 is set to a width of 105% to 120%, more preferably 107 to 115% with respect to the width of the adhesive tape 5.

The thickness _{W 2} of the side plate 3, 0.5 mm to 5.0 mm, preferably 0.9Mm～3.0Mm, more preferably on the order of 1.0 mm to 2.0 mm. Further, the diameter of the side plate 3 is set so that the length of the adhesive tape 5 to be wound or the adhesive tape 5 is attached to the core 2 so that it does not come out from the peripheral side 3b of the side plates 3 and 3 when the adhesive tape 5 is wound around the core 2. It is set as appropriate according to the diameter of the wound wound body. In this embodiment, a pair of side plates 3,3, the thickness W ₂ and diameter are respectively become equal. Further, as shown in FIG. 1, openings 30 and 30 having the same diameter and a circular cross section are provided in the central portion of the pair of side plates 3 and 3, respectively. Further, the core 2 is fixed on the inner surface 3 a of the side plate 3 so as to surround the openings 30 and 30 of the side plates 3 and 3.

  Such an adhesive tape reel 1 may be integrally formed with the core 2 and the pair of side plates 3 and 3 by injection molding or the like, and the core 2 and the pair of side plates 3 and 3 are separately molded, You may form by fitting and adhere | attaching these. When the core 2 and the side plate 3 are separated, the side plate 3 having a diameter suitable for the length of the adhesive tape 5 to be wound is appropriately employed, or the core 2 having a length suitable for the width of the adhesive tape 5 is appropriately selected. There is an advantage that it can be adopted.

  The adhesive tape 5 wound around the core 2 is obtained by, for example, thinly cutting an adhesive tape 5 having a film-like base material 6 and an adhesive layer 8 provided on one surface thereof. The adhesive tape 5 is used, for example, as a connection material that performs electrical connection and mechanical fixation so as to keep the conductive state between the electrodes facing each other and keep the insulation between adjacent electrodes. The length of the adhesive tape 5 is usually about 50 m to 1000 m, preferably 200 m to 1000 m, and more preferably 300 m to 700 m. The width of the adhesive tape 5 is about 0.5 mm to 10 mm, preferably about 0.5 mm to 3.0 mm, and more preferably about 0.5 mm to 2.0 mm. The thickness of the adhesive tape 5 is 5 μm to 100 μm, preferably 10 μm to 50 μm, more preferably about 10 μm to 30 μm. In the present embodiment, the thickness of the substrate 6 is approximately the same as the thickness of the adhesive tape 5. Moreover, in this embodiment, the length of the adhesive tape 5 is 300 m or more.

  The adhesive tape 5 is fixed to the core 2 at the initial portion (winding start portion) wound around the core 2. As this fixing method, a well-known method can be used. For example, it can be fixed with an adhesive tape or an adhesive. Further, the winding core 2 can be fixed by providing a fastener or a notch. Among these, it is preferable to fix using an adhesive tape or an adhesive from the viewpoint of workability.

  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, It is possible to use various plastic tapes made of synthetic rubber, liquid crystal polymer or the like, or metal foils such as copper and aluminum. 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. You may use what laminated | stacked the cover film for protecting the adhesive bond layer 8 further on the adhesive bond layer 8 provided on the one surface of the base material 6. FIG.

  The adhesive layer 8 is made of, for example, an adhesive composition including an adhesive component and conductive particles contained as necessary. As the adhesive component, for example, 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. An epoxy adhesive containing an epoxy resin, which is a thermosetting resin, as a main component is preferable because it can be cured for a short time, has good connection workability, and is excellent in adhesion due to its molecular structure. A radical curing adhesive composition as described in International Publication No. 2009/063827 can also be used.

  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.

  Examples of the conductive particles include particles of metals such as Au, Ag, Pt, Ni, Cu, W, Sb, Sn, solder, and carbon. Further, 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 is preferably 1 μm to 30 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 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. 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. In addition, about the component contained in these adhesive bond layers, the compounding quantity, the compounding method, etc., it is possible to use the component, the compounding quantity, the compounding method, etc. which are described in international publication 2009/063827.

  Next, the pattern formed on the inner side surface 3a of the side plate 3 described above will be described in more detail.

  FIG. 4 is an enlarged view of the side plate 3. As shown in FIG. 4, a pattern is formed on the inner side surface 3 a of the side plate 3 by a recess d that is recessed from the inner side surface 3 a. More specifically, a pattern such as a satin texture, a geometric pattern, a texture, a wood grain, a rock texture, and a grain texture is formed on the entire surface from the central portion to the peripheral side 3b of the inner side surface 3a of the side plate 3. Yes. The pattern is preferably composed of at least one of pear texture, geometric pattern, skin texture, wood texture, rock texture and sand texture. In this case, it is preferable that these patterns are uniformly formed on the entire inner surface 3 a of the side plate 3. These patterns can be formed, for example, by applying a texture to the surface of the mold forming the inner side surface 3a to form the pattern, and transferring the pattern on the mold surface to the surface of the inner side surface 3a. Thereby, the pattern formed by embossing is formed in the inner surface 3a. In addition, the area | region in which the hollow d is not formed among the inner surface 3a turns into the contact surface c contacted with the adhesive tape 5. FIG.

The dent depth W ₃ which is the depth of the dent d is preferably 0.2% or more and 20% or less, more preferably 0.5% or more and 10% or less of the thickness W ₂ of the side plate 3. . Depression depth W ₃ being refers to the depth from the inner surface 3a to the deepest point. When the depression depth W ₃ is at least 0.2% of the thickness W ₂ of the side plate 3, the contact area between the inner surface 3a of the side plate 3 of the adhesive tape reel 1 and the side surface of the adhesive tape 5 is reduced, the adhesive It can suppress that the adhesive agent of the adhesive tape 5 adheres to the inner surface 3a of the side plate 3 of the reel 1 for tapes. Depression depth W ₃ is is not more than 20% of the thickness W ₂ of the side plate 3, it is possible to secure the strength of the side plate 3 of the adhesive tape reel 1.

Depression depth _{W 3} being is preferably 0.01mm or more 0.10mm or less and preferably 0.05mm or less than 0.03 mm. When the depression depth W ₃ is 0.01mm or more, it is possible to suppress the adhesive from adhering to the d recess penetrates into the d depressions adhesive tape 5. Generally, since the thickness of the side plate 3 is 0.5 mm to 5.0 mm, the strength of the side plate 3 of the adhesive tape reel 1 can be ensured when the recess depth W ₃ is 0.10 mm or less. .

Further, depression depth W ₃ being, it is preferable shallow toward the peripheral edge 3b of the center side of the inner surface 3a. Distance W ₁ between the side plates 3,3 will tend to spread from the center side more toward the peripheral edge 3b of the plate. Therefore, when the depression depth W ₃ is the same on the center side and the peripheral side 3b, the center side, the inner side surface 3a of the side plate 3 of the adhesive tape reel 1 and the side surface of the adhesive tape 5 is more easily contacted Thus, the inner side surface 3 a of the side plate 3 of the adhesive tape reel 1 and the side surface of the adhesive tape 5 are less likely to come into contact with each other on the peripheral side 3 b. Accordingly, as directed in the circumferential edge 3b, bonding the influence of entry of the recess d of the tape 5 is reduced, the direction of the depression depth W ₃ of the peripheral edge 3b is shallower than the center side of the recess d depth of the inner surface 3a The anti-blocking effect is uniform regardless of the winding position of the adhesive tape 5, and the adhesive tape can be wound under uniform conditions regardless of the winding position.

The distance W ₁ between the side plates 3 and 3 is larger than the width of the adhesive tape 5, and the pattern d depth W ₃ is obtained by subtracting the width of the adhesive tape 5 from the distance W ₁ between the side plates 3 and 3. It is preferably 5% or more and 50% or less of the length, and more preferably 10% or more and 40% or less.

  When the depth is 5% or more, the contact area between the inner surface 3a of the side plate 3 of the adhesive tape reel 1 and the side surface of the adhesive tape 5 is reduced, and the inner surface 3a of the side plate 3 of the adhesive tape reel 1 is reduced. It can suppress that the adhesive agent of the adhesive tape 5 adheres. Moreover, it can suppress that the adhesive tape 5 penetrates into the hollow d as the said ratio is 5% or more and 50% or less. Therefore, when the ratio is 5% or more and 50% or less, the adhesive tape 5 is smoothly wound while suppressing the adhesive of the adhesive tape 5 from adhering to the inner surface 3a of the side plate 3 of the adhesive tape reel 1. Can do.

The distance W ₄ between the adjacent depressions d is preferably 0.01 mm or more and 1 mm or less, and more preferably 0.05 mm or more and 0.5 mm or less. If the distance W ₄ between adjacent recesses is 0.01mm or more, it is possible to suppress the adhesive from adhering to the recess penetrates into the d depressions adhesive tape 5. The distance between the recesses W ₄ is a 1mm or less, since the distance in contact with the side plate 3 adhesive tape 5 is continuously becomes shorter, the adhesive tape 5 can be firmly supported by the side plate 3. The distance W ₄ between the depressions d is the shortest distance between the most adjacent depressions d as shown in FIG.

  Moreover, it is preferable that the area of the inner side surface 3a excluding the depression d portion is 5% or more and 40% or less of the entire area of the inner side surface 3a including the depression d portion when viewed from the inside of the side plate 3. The hollow d portion is all the hollow d portions on the inner side surface 3a. Here, the area of the inner surface 3a will be described with reference to FIG. FIG. 5 is an enlarged view of the inner side surface 3 a of the side plate 3. (A) is a figure explaining the whole area of the inner surface 3a of the side plate 3 containing the hollow d part, (b) is a figure explaining the area of the inner surface 3a of the side plate 3 except the hollow d part. In FIG. 5, a region of the inner side surface 3 a excluding the recess d is defined as a contact surface c that contacts the adhesive tape 5. Then, the area of the entire inner side surface 3a of the side plate 3 including the depression d portion is the area A of the region shown in the perspective view of FIG. 5A, and is the region where the contact surface c and the depression d portion are added together. It becomes the area. On the other hand, the area of the inner side surface 3a excluding the depression d is an area B indicated by hatching in FIG. 5B and is an area of only the contact surface c.

  The side plate 3 of the adhesive tape reel 1 is such that the area (area B) of the inner side surface 3a excluding the depression d portion is 5% or more of the total area (area A) of the inner side surface 3a of the side plate 3 including the depression d portion. The contact area between the inner surface 3a and the side surface of the adhesive tape 5 is reduced, and adhesion of the adhesive of the adhesive tape 5 to the inner surface 3a of the side plate 3 of the adhesive tape reel 1 can be suppressed. When the area B is 40% or less of the area A, the strength of the side plate 3 of the adhesive tape reel 1 can be secured. The area B is more preferably 10% or more and 20% or less of the area A.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment.

  Further, the cross-sectional shape of the recess d is not limited to the arc shape as shown in FIG. 4, and as shown in FIG. 6, (a) a triangular shape, (b) a shape in which corners of the rectangular shape are chamfered, (C) (d) Various shapes such as those in which these are arranged can be adopted.

Further, the adhesive tape reel 1 is not limited to the one in which the pair of side plates 3 and 3 are provided to face each other so as to sandwich the core 2 as shown in FIG. For example, the winding core 2 may be provided so as to protrude to the outside of the pair of side plates 3 and 3. Furthermore, the pair of side plates 3,3, the thickness W ₂ and diameter may be not equal, respectively.

  Further, in the above-described adhesive tape reel 1, the adhesive layer 8 is wound with the adhesive tape 5 containing the adhesive component and the conductive particles contained as necessary. Not limited. The adhesive layer 8 is made of an adhesive component and does not have to include conductive particles. Moreover, it is good also as a conductive tape which mix | blends more conductive particles with the adhesive bond layer 8 than an anisotropic conductive tape, and does not have anisotropy. Adhesive films for various electronic materials such as die bond films, silver films, and adhesive films for processing semiconductor wafers can be applied as tapes that are wound around the core 2 other than the above.

  Hereinafter, preferred examples of the present invention will be described in more detail, but the present invention is not limited to these examples.

  Adhesive tape reel and adhesive tape are manufactured under the conditions shown in Table 1, and then the adhesive tape reel side plate when the adhesive tape reel is wound around the adhesive tape reel at a temperature of 30 degrees for 24 hours. The presence or absence of adhesion of the adhesive to the inner surface of the film and the occurrence of blocking phenomenon were examined. As a result, the pattern using the recesses recessed from the inner side surface is formed on the inner side surfaces of the pair of side plates. Compared with the adhesive tape reel of Comparative Example 1 in which no is formed, the adhesive of the adhesive tape did not adhere to the inside of the side plate of the adhesive tape reel, and no blocking occurred.

接触面積：窪み部分を含む内側面全体の面積に対する窪み部分を除く内側面の面積の割合とした。

Contact area: The ratio of the area of the inner surface excluding the recessed portion to the area of the entire inner surface including the recessed portion.

  DESCRIPTION OF SYMBOLS 1 ... Adhesive tape reel, 2 ... Core, 3 ... Side plate, 3a ... Inner side surface, 3b ... Periphery, 5 ... Adhesive tape, 5a ... Side surface of adhesive tape, d ... Depression, 10 ... Tape.

Claims (12)

A core around which an adhesive tape can be wound;
A pair of side plates provided opposite to each other at both ends of the core;
With
The reel for adhesive tapes in which the pattern by the hollow recessed from the said inner surface is formed in the inner surface of a pair of said side plate.   The reel for an adhesive tape according to claim 1, wherein the pattern is formed by embossing.   The reel for an adhesive tape according to claim 1 or 2, wherein the pattern is formed on the entire inner surface.   The reel for an adhesive tape according to claim 1 or 2, wherein the pattern is uniformly formed on the entire inner surface. The distance between the pair of side plates is larger than the width of the adhesive tape,
The adhesive tape according to any one of claims 1 to 4, wherein a recess depth of the pattern is 5% or more and 50% or less of a length obtained by subtracting a width of the adhesive tape from a distance between the pair of side plates. Reel.   The adhesive tape reel according to any one of claims 1 to 5, wherein the recess depth is 0.2% or more and 20% or less of the thickness of the side plate.   The reel for adhesive tape according to any one of claims 1 to 6, wherein the depth of the recess is 0.01 mm or more and 0.10 mm.   The reel for an adhesive tape according to any one of claims 1 to 7, wherein an area of the inner surface excluding the recessed portion is 5% or more and 40% or less of an entire area of the inner surface including the recessed portion.   The distance between adjacent said hollows is 0.01 mm or more and 1 mm or less, The reel for adhesive tapes as described in any one of Claims 1-8.   The reel for adhesive tapes according to any one of claims 1 to 9, wherein the recess depth is shallower on the peripheral side than on the center side of the inner surface.   The reel for adhesive tape according to any one of claims 1 to 10, wherein the pattern comprises at least one of a satin texture, a geometric pattern, a texture, a wood grain, a rock texture, and a sand texture.   A tape comprising: the adhesive tape reel according to any one of claims 1 to 11; and the adhesive tape wound around the core of the adhesive tape reel.

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