KR102534610B1 - Adhesive tape, adhesive tape winding reel, and manufacturing method of adhesive tape - Google Patents

Abstract

The adhesive tape 11 is an adhesive tape in which an adhesive layer 13 is provided on one surface 12a side of the separator 12, and in the lead part L of the adhesive tape 11, at least on the front end side of the lead part L. A pick-up tape 21 having a thickness of 10 μm or more and 30 μm or less is provided that terminates at the same position as the lead portion L so that the adhesive layer 13 is not exposed.

Description

Adhesive tape, adhesive tape winding reel, and manufacturing method of adhesive tape

The present disclosure relates to an adhesive tape, an adhesive tape winding reel, and a method for manufacturing the adhesive tape.

Conventionally, an adhesive tape for connecting to-be-connected members having a large number of electrodes is used. As such an adhesive tape, there is an anisotropic conductive tape, for example. When an anisotropic conductive tape is used, for example, when connecting semiconductor elements such as ICs and LSIs to substrates such as printed wiring boards, glass substrates for LCDs, and flexible printed boards, the opposing electrodes are conducted while the adjacent electrodes are connected. It is possible to maintain the insulation state of each other.

An adhesive tape is formed by forming, for example, an adhesive layer containing an adhesive component containing a thermosetting resin and conductive particles blended as needed on a substrate such as polyethylene terephthalate film (PET). An adhesive tape is produced by slitting a sheet-like original fabric to a width suitable for use, and stored, transported, and used in the state of a wound body wound on a reel (see Patent Document 1, for example).

Japanese Unexamined Patent Publication No. 2003-34468

Conventionally, the lead portion is fixed by attaching a lead tape protruding beyond the edge of the adhesive tape to a lead portion (unwinding portion) of the adhesive tape wound on a reel, and attaching the lead tape to the reel. However, in recent years, the demand for adhesive tapes with a narrower width has become stronger. Therefore, the thickness of the lead tape is relatively large compared to the width of the adhesive tape, and it is difficult to slit the lead portion of the adhesive tape in the state where the lead tape is attached. In the present state, the lead tape attached to the lead portion is once peeled off, and after performing a slit process, the lead tape is affixed to each of the thinned adhesive tapes. Therefore, there existed a problem that the manufacturing process of an adhesive tape became complicated.

This indication was made for the solution of the said subject, and aims at providing the thin adhesive tape which can simplify a manufacturing process, an adhesive tape winding reel, and the manufacturing method of an adhesive tape.

An adhesive tape according to one aspect of the present disclosure is an adhesive tape in which a first adhesive layer is provided on one surface side of a first separator, so that the first adhesive layer is not exposed on the lead portion of the adhesive tape, at least on the front end side of the lead portion, A pick-up tape having a thickness of 10 μm or more and 30 μm or less that terminates at the same position as the lead portion is provided.

In this adhesive tape, a pickup tape having a thickness of 10 μm or more and 30 μm or less is provided on the lead portion. By making the thickness of a pick-up tape into the said range, the thickness of a pick-up tape with respect to the width|variety of an adhesive tape can be made relatively small. Therefore, it becomes possible to cut the adhesive tape into a narrow width by slit processing in the state where the pick-up tape is applied, and the manufacturing process is simplified. In addition, since the first adhesive layer is not exposed on the front end side of the lead portion, even when the lead portion is fixed to a reel, etc., when the lead portion is removed from the reel or the like during use, the first adhesive layer is prevented from peeling off from the first separator can do.

In addition, the pick-up tape may have a second adhesive layer on one side of the second separator, and may be fixed to the lead portion so that the second adhesive layer and the first adhesive layer on the adhesive tape side face each other. This makes it possible to firmly fix the pick-up tape to the adhesive tape.

In addition, the pick-up tape may have a third adhesive layer on the other surface side of the second separator, and an exposed area where the second separator is exposed from the third adhesive layer may be provided on the terminal side of the lead portion. In this case, the lead portion can be fixed to the reel or the like by the third adhesive layer without using a separate seal. In addition, by forming the exposed area on the terminal side of the lead portion, the lead portion can be easily removed from the reel or the like during use.

Further, the pick-up tape has a fourth adhesive layer on the other side of the second separator, the second separator is fixed to the lead portion by being attached to the first adhesive layer on the adhesive tape side, and the second separator is attached to the end side of the lead portion. An exposed area exposed from the fourth adhesive layer may be provided. In this case, the lead portion can be fixed to the reel or the like by the fourth adhesive layer without using a separate seal. In addition, by providing the exposed area at the end side of the lead portion, the lead portion can be easily removed from the reel or the like at the time of use of the adhesive tape. Further, by not providing an adhesive layer on one side of the second separator, the overall thickness of the lead portion including the pick-up tape can be suppressed. Therefore, slit processing can be performed more reliably in a state where the pick-up tape is applied.

In addition, the pickup tape may be composed of only the second separator, and the second separator may be fixed to the lead portion by being attached to the first adhesive layer on the adhesive tape side. In this case, the overall thickness of the lead portion including the pickup tape can be further suppressed. Therefore, slit processing can be performed more reliably in a state where the pick-up tape is applied.

In addition, the adhesive layer on the pick-up tape side may be colored with a color different from that of the first adhesive layer. Thereby, the visibility and identification of the pick-up tape can be improved. Therefore, it is possible to improve workability in the case of cutting the lead portion at the time of using the adhesive tape.

Moreover, the width|variety orthogonal to the longitudinal direction of an adhesive tape may be 0.8 mm or less. When the width of the adhesive tape is 0.8 mm or less, it becomes difficult to slit the lead portion of the adhesive tape in a state where the conventional lead tape is attached. Therefore, when the width of the adhesive tape is 0.8 mm or less, application of the above-described pickup tape becomes particularly useful.

In addition, the adhesive tape winding reel according to one aspect of the present disclosure includes a winding core on which the adhesive tape is wound, and a pair of side plates facing each other with the winding core interposed therebetween, and the lead of the adhesive tape pulled out from the winding core The part is fixed to the outer surface side of the side plate.

In this adhesive tape winding reel, a pickup tape having a thickness of 10 μm or more and 30 μm or less is provided in the lead portion of the adhesive tape. By making the thickness of a pick-up tape into the said range, the thickness of a pick-up tape with respect to the width|variety of an adhesive tape can be made relatively small. Therefore, it becomes possible to cut the adhesive tape into a narrow width by slit processing in the state where the pick-up tape is applied, and the manufacturing process is simplified. In addition, since the first adhesive layer is not exposed on the tip side of the lead portion, it is possible to prevent the first adhesive layer from being separated from the first separator when the lead portion is removed from the reel during use.

In addition, a method for manufacturing an adhesive tape according to one aspect of the present disclosure is a method for manufacturing an adhesive tape in which a first adhesive layer is provided on one side of a first separator, so that the first adhesive layer is not exposed while releasing the adhesive tape from the fabric. A pick-up tape having a thickness of 10 μm or more and 30 μm or less, which is equal to the width of the fabric, is attached to the first adhesive layer at predetermined lengths, and the adhesive tape with the pick-up tape is slit in the longitudinal direction and cut into a plurality of sets of adhesive tapes. After cutting a plurality of sets of adhesive tapes in the width direction together with the pick-up tape to terminate the lead portion, the plurality of sets of adhesive tapes are wound on a reel, respectively.

In this adhesive tape manufacturing method, a pickup tape having a thickness of 10 μm or more and 30 μm or less is applied to the lead portion. By making the thickness of a pick-up tape into the said range, the thickness of a pick-up tape with respect to the width|variety of an adhesive tape can be made relatively small. Therefore, it becomes possible to cut the adhesive tape into a narrow width by slit processing in the state where the pick-up tape is applied, and the manufacturing process is simplified. In addition, since the first adhesive layer is not exposed on the front end side of the lead portion in the produced adhesive tape, even when the lead portion is fixed to a reel or the like, when the lead portion is removed from the reel or the like during use, the first adhesive layer is removed from the first separator. Separation can be prevented.

According to this indication, the manufacturing process of a narrow adhesive tape can be simplified.

1 is a side view showing an embodiment of an adhesive tape winding reel.
Fig. 2 is a schematic cross-sectional view showing an embodiment of an adhesive tape.
Fig. 3 is a schematic diagram showing one embodiment of a method for manufacturing an adhesive tape.
Fig. 4 is a schematic cross-sectional view showing a modified example of an adhesive tape.
5 is a schematic cross-sectional view showing another modified example of an adhesive tape.
Fig. 6 is a schematic cross-sectional view showing another modified example of the adhesive tape.

DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of an adhesive tape, an adhesive tape winding reel, and an adhesive tape manufacturing method according to one aspect of the present disclosure will be described in detail with reference to the drawings.

1 is a side view showing an embodiment of an adhesive tape winding reel. As shown in the figure, the adhesive tape winding reel 1 includes a core 2 on which the adhesive tape 11 is wound, and a pair of side plates 3, 3 facing each other with the core 2 interposed therebetween. ). The adhesive tape winding reel 1 is a reel used for manufacturing, supplying, and storing the adhesive tape 11, and winding the adhesive tape 11 wound around the winding core 2 by a pair of side plates 3, 3 It has the effect of preventing collapse.

The winding core 2 is a part where the adhesive tape 11 is wound. The core 2 is made of plastic, for example, and has an annular shape having the same thickness as the width of the adhesive tape 11 . In this embodiment, the adhesive tape 11 is wound around the core 2 so that the adhesive layer 13 (see FIG. 2 ) of the adhesive tape 11 faces inside (to the core 2 side). In the hollow portion 2a of the core 2, for example, a winding device used for winding the adhesive tape 11 onto the adhesive tape winding reel 1 or an adhesive tape from the adhesive tape winding reel 1 ( 11) The shaft hole (not shown) into which the rotating shaft of the feeding device used for unloading is inserted can be installed. By driving the rotating shaft in a state where the rotating shaft of the take-up device or feeding device is inserted into the shaft hole, the adhesive tape winding reel 1 rotates without revolution.

The side plate 3 is made of the same plastic as the winding core 2, and has a disk shape. The thickness of the side plate 3 is, for example, 0.5 mm to 5.0 mm, preferably 0.9 mm to 3.0 mm, and more preferably 1.0 mm to 2.0 mm. The diameter of the side plate 3 is appropriately set so as to be a sufficiently large diameter with respect to the diameter of the winding core 2 according to the length of the adhesive tape T wound around the winding core 2 . In the central portion of the side plate 3, a circular opening communicating with the hollow portion 2a of the core 2 is provided in order to enable the arrangement of the shaft hole described above.

On the inner surface of the side plate 3, a plurality of ribs 4 extending radially from the center side of the adhesive tape winding reel 1 toward the periphery side are provided. In the example of Fig. 1, 16 linear ribs 4 are provided with a phase angle of 22.5 degrees. The rib 4 has, for example, an arcuate cross-section, and protrudes from the inner surface of the side plate 3 in a range of about 0.05 mm to 1.00 mm, for example. By the arrangement of the ribs 4, the winding collapse of the adhesive tape 11 wound around the core 2 is suppressed, and the adhesive layer 13 of the adhesive tape 11 due to collision with the side plate 3 (Fig. 2) exhibits effects such as suppression of peeling (blocking phenomenon).

Next, the adhesive tape 11 is explained in detail.

2 is a schematic cross-sectional view showing an embodiment of an adhesive tape. As shown in the figure, the adhesive tape 11 has a two-layer structure by a separator (first separator) 12 and an adhesive layer (first adhesive layer) 13 formed on one surface 12a side of the separator 12. is making up In this embodiment, the adhesive tape 11 exemplifies an anisotropic conductive tape used for connection between to-be-connected members. The anisotropic conductive tape is an adhesive tape used when connecting semiconductor elements such as ICs and LSIs to various substrates such as printed wiring boards, glass substrates for LCDs, and flexible printed boards, for example. The anisotropic conductive tape can maintain the insulating state of adjacent electrodes while making the opposing electrodes electrically conductive.

The length of the adhesive tape 11 is 10 m or more and 1000 m or less, for example. In this embodiment, it is 300 m, for example. The adhesive tape 11 is stored and conveyed in the state of a wound object by using the adhesive tape winding reel 1 described above. The width of the adhesive tape 11 is, for example, 0.8 mm or less, preferably 0.6 mm or less. The thickness of the adhesive tape 11 (the total thickness of the separator 12 and the adhesive layer 13) is, for example, 5 μm or more and 100 μm or less, preferably 10 μm or more and 40 μm or less, more preferably 10 μm or more 20 less than μm.

As the material of the separator 12, from the viewpoint of the strength of the adhesive tape 11 and the peelability of the adhesive layer 13, for example, oriented polypropylene (OPP), polyethylene terephthalate (PET), polyethylene naphthalate, and polyethylene isophthalate. , polybutylene terephthalate, polyolefin, polyacetate, polycarbonate, polyphenylene sulfide, polyamide, ethylene-vinyl acetate copolymer, polyvinyl chloride, polyvinylidene chloride, synthetic rubber, liquid crystal polymer, etc. can be used. there is.

The mold release process may be given to the other surface 12b side of the separator 12. As the release agent for performing the release treatment, for example, an olefin type release agent, ethylene glycol moncarbonate ester, carnauba wax, low melting point wax such as petroleum wax, low molecular weight fluororesin, silicone type or fluorine type surfactant, oil, wax, Silicone resins, such as resin and a polyester modified silicone resin, etc. can be used. Generally, silicone resin is used.

As the material of the adhesive layer 13, for example, an adhesive containing a resin such as a thermoplastic resin, a thermosetting resin, or a mixture of a thermoplastic resin and a thermosetting resin (mixed resin) can be used. As a representative thermoplastic resin, a styrene resin system and a polyester resin system are mentioned, for example. As a typical thermosetting resin, an epoxy resin type, an acrylic resin type, and a silicone resin type are mentioned, for example.

When the adhesive tape 11 is an anisotropic conductive tape, the adhesive layer 13 may include an adhesive component and conductive particles contained as needed. As the adhesive component, it is preferable to use a crosslinkable material because, for example, a material exhibiting curability by heat or light can be widely applied and has excellent heat resistance and moisture resistance after connection. Epoxy-based adhesives containing a thermosetting epoxy resin as a main component are preferred in terms of characteristics such as being able to cure in a short time, good connection workability, and excellent adhesiveness due to molecular structure. As the epoxy-based adhesive, for example, a high-molecular-weight epoxy, solid epoxy or liquid epoxy, or one containing as a main component an epoxy modified with urethane, polyester, acrylic rubber, nitrile rubber (NBR), synthetic linear polyamide, etc. can be used. there is. Epoxy-based adhesives are generally made by adding a curing agent, catalyst, coupling agent, filler, etc. to the above epoxy constituting the main component.

Examples of the conductive particles include metals such as Au, Ag, Pt, Ni, Cu, W, Sb, Sn, and solder, or particles of carbon. Alternatively, coated particles made of non-conductive glass, ceramics, plastic, etc. as nuclei and coated with the metal or carbon described above may be used. The average particle diameter of the conductive particles is preferably 1 μm or more and 18 μm or less, for example, from the viewpoints of dispersibility and conductivity. Incidentally, insulated-coated particles formed by covering conductive particles with an insulating layer may be used, or conductive particles and insulating particles may be used in combination from the viewpoint of improving the insulation between adjacent electrodes.

A pickup tape 21 is provided in the lead portion L (portion drawn out from the adhesive tape winding reel 1) of the adhesive tape 11. As shown in FIG. 1, the pick-up tape 21 is pulled out between the side plates 3 and 3 in the state where the adhesive tape 11 is wound around the adhesive tape winding reel 1, and the seal S seals one side. It is fixed to the outer surface of the side plate (3). When using the adhesive tape 11, after the seal S is peeled off, the adhesive tape 11 can be taken out from the adhesive tape winding reel 1 by gripping the pick-up tape 21. The seal S is not particularly limited, and a general seal can be used. When using the adhesive tape 11, you may cut the lead part L together with the pick-up tape 21.

As shown in FIG. 2, the pick-up tape 21 consists of a separator (second separator) 22 and an adhesive layer (second adhesive layer) 23 formed on one surface 22a side of the separator 12. making up the structure. The pick-up tape 21 is attached to the lead portion L so that the adhesive layer 23 and the adhesive layer 13 on the side of the adhesive tape 11 face each other. Further, the terminal position F2 of the pick-up tape 21 coincides with the terminal position F1 of the lead part L of the adhesive tape 11 . As a result, in the lead portion L of the adhesive tape 11, the adhesive layer 13 is sandwiched by the separator 12 and the pick-up tape 21, so that the adhesive layer 13 is not exposed to the outside. .

The length of the pick-up tape 21 is the length corresponding to the lead part L of the adhesive tape 11, and is 30 mm or more and 300 mm or less, for example. In addition, the width of the pick-up tape 21 is, for example, 0.8 mm or less, preferably 0.6 mm or less, and is equal to the width of the adhesive tape 11. The thickness of the pick-up tape 21 (the total thickness of the separator 12 and the adhesive layer 13) is, for example, 10 μm or more and 30 μm or less, preferably 10 μm or more and 20 μm or less. When the thickness of the pick-up tape 21 is less than 10 μm, it is considered that the pick-up tape 21 curls when attached to the adhesive tape 11, and air bubbles are generated between the adhesive layers 13 and 23. Also, when the thickness of the pick-up tape 21 exceeds 30 μm, it becomes difficult to cut the pick-up tape 21 to the same width as the adhesive tape 11 . Therefore, within the above thickness range, the pick-up tape 21 can be easily cut while suppressing the generation of air bubbles.

As the material of the separator 22, similarly to the separator 12 of the adhesive tape 11, for example, stretched polypropylene (OPP), polyethylene terephthalate (PET), polyethylene naphthalate, polyethylene isophthalate, polybutylene tere Phthalates, polyolefins, polyacetates, polycarbonates, polyphenylene sulfides, polyamides, ethylene-vinyl acetate copolymers, polyvinyl chlorides, polyvinylidene chlorides, synthetic rubbers, liquid crystal polymers and the like can be used.

As the material of the adhesive layer 23, a silicone pressure sensitive adhesive or an acrylic pressure sensitive adhesive can be used, for example. Considering the case where silicone-free is required, including auxiliary materials other than the adhesive layer 13, in terms of specifications of the customer's final product, it is preferable to use an acrylic adhesive as the material of the adhesive layer 23. From the viewpoint of improving the visibility and identification of the pickup tape 21, the adhesive layer 23 is preferably colored with a color different from that of the adhesive layer 13 on the adhesive tape 11 side. The color of the adhesive layers 13 and 23 is not particularly limited. As an example, the color of the adhesive layer 13 on the adhesive tape 11 side is colorless and transparent, and the color of the adhesive layer 23 on the pick-up tape 21 side is set to You can do it in blue. In addition, when white PET is used for the separator 12, the color of the separator 22 and the adhesive layer 23 of the pick-up tape 21 can also be made black from the relationship of contrast.

Subsequently, the manufacturing method of the adhesive tape 11 is demonstrated.

Fig. 3 is a schematic view showing one embodiment of a method for manufacturing an adhesive tape. As shown in the same figure, the manufacturing apparatus 101 is used for manufacture of the adhesive tape 11. The manufacturing apparatus 101 includes a feeding device 102 on which the original fabric P of the adhesive tape 11 is wound, a take-up device 103 to which a plurality of adhesive tape winding reels 1 are rotatably mounted, and an adhesive tape ( 11) is provided with a processing device 104 that performs the slit processing.

From the feeding device 102, the adhesive tape 11 is unwound from the original fabric P at a constant speed. To the adhesive tape 11 unwound from the feeding device 102, a wide paper pick-up tape 21 having a thickness of 10 μm or more and 30 μm or less, which is equal to the width of the original fabric P, is attached at regular intervals. At this time, the adhesive layer 23 of the pickup tape 21 faces the adhesive layer 13 of the adhesive tape 11. In this way, the adhesive layer 13 of the adhesive tape 11 is not exposed to the outside in the portion where the pick-up tape 21 is attached.

After attaching the pick-up tape 21, the adhesive tape 11 is sent to the processing device 104. Then, the adhesive tape 11 to which the pick-up tape 21 is attached is subjected to a slit process in the longitudinal direction and cut into a plurality of sets of adhesive tapes 11 having a width of 0.8 mm or less. After slitting the adhesive tape 11, a plurality of sets of adhesive tape 11 are cut along with the pick-up tape 21 in the width direction to terminate the lead portion L (line A-A in Fig. 3). Thereby, the terminal position F1 of the lead part L of the adhesive tape 11 and the terminal position F2 of the pick-up tape 21 are made to coincide.

After the lead portion L is terminated, each of the plurality of sets of adhesive tapes 11 to which the pick-up tape 21 is attached is wound around the core 2 of the adhesive tape winding reel 1 by the winding device 103. Then, the lead part L is pulled out between the side plates 3 and 3 of the adhesive tape winding reel 1, and is fixed to the outer surface of the one side plate 3 with a seal S. Thereby, as shown in FIG. 1, the adhesive tape 11 wound around the adhesive tape winding reel 1 is obtained.

As described above, in the adhesive tape 11, the lead portion L is provided with a pickup tape 21 having a thickness of 10 μm or more and 30 μm or less. By making the thickness of the pick-up tape 21 into the said range, the thickness of the pick-up tape 21 with respect to the width|variety of the adhesive tape 11 can be made relatively small. Therefore, it becomes possible to cut the adhesive tape 11 thin by slit processing in the state where the pick-up tape 21 is pasted, and the manufacturing process is simplified. In addition, since the adhesive layer 13 is not exposed on the front end side of the lead portion L, even when the lead portion L is fixed to the adhesive tape winding reel 1, the lead portion L is attached to the adhesive tape during use. It is possible to prevent the adhesive layer 13 from peeling off from the separator 12 when it is removed from the winding reel 1 .

In this embodiment, the pick-up tape 21 has an adhesive layer 23 on one surface 22a side of the separator 22, and the adhesive layer 23 and the adhesive layer 13 on the adhesive tape 11 side face each other. It is fixed to the lead part (L). In this way, the pick-up tape 21 can be securely fixed to the adhesive tape 11 .

In this embodiment, the adhesive layer 23 on the pick-up tape 21 side is colored with a color different from that of the adhesive layer 13 on the adhesive tape 11 side. Thereby, the visibility and identification of the pickup tape 21 can be improved. Therefore, when using the adhesive tape 11, workability|operativity, such as when cutting the lead part (L), can be improved.

Moreover, in this embodiment, the width|variety orthogonal to the longitudinal direction of the adhesive tape 11 is 0.8 mm or less. For example, in the processing device 104 for slitting the adhesive tape 11, the upper blade and the lower blade are lapped to cut the adhesive tape 11, but when the slit width becomes narrow, between the upper blade and the lower blade clearance is also narrowed. For this reason, if the thickness of the object to be cut is relatively large compared to the width, it becomes difficult to pass the blade through the object to be cut. This point can be addressed to some extent by, for example, thinning the upper blade, but there is a limit to the thinning of the upper blade due to problems such as abrasion of the blade. Due to these circumstances, when the width of the adhesive tape is 0.8 mm or less, it becomes difficult to slit the lead portion of the adhesive tape in a state where the conventional lead tape is attached. Therefore, when the width of the adhesive tape 11 is 0.8 mm or less as in the present embodiment, it is particularly useful to apply the pickup tape 21 having a thickness of 10 μm or more and 30 μm or less to the lead portion L.

An adhesive tape can adopt various deformation|transformation. 4 is a schematic cross-sectional view showing a modified example of an adhesive tape. In the adhesive tape 31 shown in the same figure, the configuration of the pickup tape 41 provided on the lead part L is different from the above embodiment. Specifically, the pick-up tape 41 includes a separator (second separator) 22, an adhesive layer (second adhesive layer) 23 formed on one surface 22a side of the separator 22, and the other side of the separator 22. A three-layer structure is formed by the adhesive layer (third adhesive layer) 43 formed on the surface 22b side. The thickness of the pickup tape 41 (the total thickness of the separator 22, the adhesive layer 23, and the adhesive layer 43) is, for example, 10 μm or more and 30 μm or less, preferably 10 μm or more and 20 μm or less.

The adhesive layer 43 is made of the same material as the adhesive layer 23, for example. Like the adhesive layer 23, the adhesive layer 43 may be colored with a color different from that of the adhesive layer 13 on the adhesive tape 31 side. In the adhesive tape 31, the terminal position F2 of the pickup tape 41 coincides with the terminal position F1 of the lead part L of the adhesive tape 31, but on the terminal side of the lead part L, there is a separator An exposed area R in which the other surface 22b of 22 is exposed from the adhesive layer 13 is provided. The length of the exposed region R from the end position F2 is, for example, 5 mm or more and less than 30 mm.

Also in such an adhesive tape 31, it becomes possible to cut the adhesive tape 31 thin by slit processing in the state where the pick-up tape 41 was stuck, and the manufacturing process is simplified. In addition, since the adhesive layer 13 is not exposed on the front end side of the lead portion L, even when the lead portion L is fixed to the adhesive tape winding reel 1, the lead portion L is attached to the adhesive tape during use. It is possible to prevent the adhesive layer 13 from peeling off from the separator 12 when it is removed from the winding reel 1 .

Moreover, in the adhesive tape 31, the lead part L can be fixed to the adhesive tape winding reel 1 by the adhesive layer 43, without separately using the seal S (refer FIG. 1). In addition, by providing the exposed region R on the terminal side of the lead portion L, the exposed region R becomes a gripping portion when peeling the lead portion L from the adhesive tape winding reel 1, so that during use The lead portion L can be easily removed from the adhesive tape winding reel 1.

5 is a schematic cross-sectional view showing another modified example of the adhesive tape. In the adhesive tape 51 shown in the same figure, the configuration of the pickup tape 61 provided on the lead part L is further different from the above embodiment. Specifically, the pick-up tape 61 has a two-layer structure of a separator (second separator) 22 and an adhesive layer (fourth adhesive layer) 63 formed on the other surface 22b side of the separator 22. there is. The pick-up tape 61 is fixed to the adhesive tape 51 by directly attaching the one surface 22a side of the separator 22 to the adhesive layer 13 on the adhesive tape 51 side. The thickness of the pick-up tape 61 (the total thickness of the separator 22 and the adhesive layer 63) is, for example, 10 μm or more and 30 μm or less, preferably 10 μm or more and 20 μm or less.

The adhesive layer 63 has the same structure as the adhesive layer 23, for example. That is, the adhesive layer 63 is made of the same material as the adhesive layer 23 . In addition, the adhesive layer 63 is colored with a color different from that of the adhesive layer 13 on the adhesive tape 51 side. The terminal position F2 of the pickup tape 61 coincides with the terminal position F1 of the lead part L of the adhesive tape 51, but on the terminal side of the lead part L, the other surface of the separator 22 ( 22b) is exposed from the adhesive layer 63 (R) is provided. The length of the exposed area|region R from the terminal part position F2 is 5 mm or more and less than 30 mm, for example.

Also in such an adhesive tape 51, it becomes possible to cut the adhesive tape 51 thin by slit processing in the state where the pick-up tape 61 was stuck, and the manufacturing process is simplified. In addition, since the adhesive layer 13 is not exposed on the front end side of the lead portion L, even when the lead portion L is fixed to the adhesive tape winding reel 1, the lead portion L is attached to the adhesive tape during use. It is possible to prevent the adhesive layer 13 from peeling off from the separator 12 when it is removed from the winding reel 1 .

Moreover, in the adhesive tape 51, the lead part L can be fixed to the adhesive tape winding reel 1 by the adhesive layer 63, without separately using the seal S (refer FIG. 1). In addition, by providing the exposed region R on the terminal side of the lead portion L, the exposed region R becomes a gripping portion when peeling the lead portion L from the adhesive tape winding reel 1, so that during use The lead portion L can be easily removed from the adhesive tape winding reel 1. In addition, in the adhesive tape 51, by not providing an adhesive layer on the one surface 22a side of the separator 22 in the pickup tape 61, the entire lead portion L including the pickup tape 61 thickness can be reduced. Therefore, slit processing can be performed more reliably in a state where the pick-up tape 61 is applied.

6 is a schematic cross-sectional view showing another modified example of the adhesive tape. In the adhesive tape 71 shown in the same figure, the configuration of the pickup tape 81 provided on the lead part L is further different from the above embodiment. Specifically, the pick-up tape 81 has a one-layer configuration of only the separator (second separator) 22 . The pickup tape 81 is fixed to the adhesive tape 71 by directly attaching the one surface 22a side of the separator 22 to the adhesive layer 13 on the adhesive tape 71 side. When fixing the lead part L of this adhesive tape 71 to the adhesive tape winding reel 1, the seal S may be used similarly to the case of FIG. The thickness of the pick-up tape 81 (the thickness of the separator 22) is, for example, 10 μm or more and 30 μm or less, preferably 10 μm or more and 20 μm or less.

Also in such an adhesive tape 71, it becomes possible to cut the adhesive tape 71 thin by slit processing in the state where the pick-up tape 81 was stuck, and the manufacturing process is simplified. In addition, since the adhesive layer 13 is not exposed on the front end side of the lead portion L, even when the lead portion L is fixed to the adhesive tape winding reel 1, the lead portion L is attached to the adhesive tape during use. It is possible to prevent the adhesive layer 13 from peeling off from the separator 12 when it is removed from the winding reel 1 . Further, in the adhesive tape 71, since the pick-up tape 81 has a single-layer structure of only the separator 22, the overall thickness of the lead portion L including the pick-up tape 81 can be further reduced. Therefore, slit processing can be performed more reliably in a state where the pick-up tape 81 is applied.

1: adhesive tape winding reel
2: winding core
3: side plate
11, 31, 51, 71: adhesive tape
12: separator (first separator)
12a: one side
13: adhesive layer (first adhesive layer)
21, 41, 61, 81: pickup tape
22: separator (second separator)
22a: one side
22b: the other side
23: adhesive layer (second adhesive layer)
43: adhesive layer (third adhesive layer)
63: adhesive layer (fourth adhesive layer)
L: lead part
R: exposure area

Claims (9)

An adhesive tape in which a first adhesive layer is provided on one side of a first separator,
The lead portion of the adhesive tape is provided with a pickup tape having a thickness of 10 μm or more and 30 μm or less that terminates at the same position as the lead portion so that the first adhesive layer is not exposed at least on the front end side of the lead portion,
The pick-up tape has a second adhesive layer on one side of the second separator and a third adhesive layer on the other side of the second separator, and the second adhesive layer and the first adhesive layer on the adhesive tape face each other fixed to the lead part,
An adhesive tape wherein an exposed area where the second separator is exposed from the third adhesive layer is provided at a terminal side of the lead portion. The adhesive tape according to claim 1, wherein the adhesive layer on the pickup tape side is colored with a color different from that of the first adhesive layer. The adhesive tape according to claim 1, wherein the width orthogonal to the longitudinal direction is 0.8 mm or less. A winding core on which the adhesive tape according to any one of claims 1 to 3 is wound;
A pair of side plates facing each other with the winding core interposed therebetween,
The adhesive tape winding reel in which the lead part of the adhesive tape drawn out from the winding core is fixed to the outer surface side of the side plate. delete delete delete delete delete

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