CN111133069A

CN111133069A - Adhesive tape, adhesive tape winding reel, and method for producing adhesive tape

Info

Publication number: CN111133069A
Application number: CN201880062239.8A
Authority: CN
Inventors: 立泽贵; 工藤直; 森尻智树; 大当友美子; 熊田达也; 前原泰夫; 小菅贞治
Original assignee: Hitachi Chemical Co Ltd
Current assignee: Lishennoco Co ltd
Priority date: 2017-09-29
Filing date: 2018-09-27
Publication date: 2020-05-08
Anticipated expiration: 2038-09-27
Also published as: TW201919872A; CN111133069B; KR102534610B1; TWI774850B; JP7180606B2; JPWO2019065881A1; WO2019065881A1; KR20200062212A

Abstract

The adhesive tape 11 is provided with an adhesive layer 13 on the side of one surface 12a of the release material 12, and a pickup tape 21 having a thickness of 10 μm or more and 30 μm or less is provided on the leading portion L of the adhesive tape 11 so as not to expose the adhesive layer 13 at least on the leading end side of the leading portion L and terminating at the same position as the leading portion L.

Description

Adhesive tape, adhesive tape winding reel, and method for producing adhesive tape

Technical Field

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

Background

Conventionally, an adhesive tape for connecting members to be connected having a plurality of electrodes to each other has been used. As such an adhesive tape, for example, an anisotropic conductive tape is known. When the anisotropic conductive tape is used, 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, the opposite electrodes can be electrically connected to each other, but the insulating state between the adjacent electrodes can be maintained.

The adhesive tape is formed by forming an adhesive layer containing an adhesive component containing a thermosetting resin and, if necessary, conductive particles, on a base material such as polyethylene terephthalate (PET). The adhesive tape is produced by slitting a sheet-like raw tape into long tapes in a width suitable for the purpose, and is stored, transported, and used in a state of a wound body wound on a roll (see, for example, patent document 1).

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2003-34468

Disclosure of Invention

Problems to be solved by the invention

Conventionally, a guide tape that extends beyond an end of an adhesive tape is attached to a guide portion (lead-out portion) of the adhesive tape wound around a reel, and the guide tape is attached to the reel, whereby the guide portion is fixed. However, in recent years, the demand for adhesive tapes with narrower widths is increasing. Therefore, the thickness of the guide tape is relatively larger than the width of the adhesive tape, and it is difficult to slit the guide portion of the adhesive tape in a state where the guide tape is attached. In the present situation, the guide tape attached to the guide portion is temporarily peeled off and slit, and then the guide tape is attached to each adhesive tape having a narrowed width. Therefore, there is a problem that the manufacturing process of the adhesive tape becomes complicated.

The present disclosure has been made to solve the above problems, and an object thereof is to provide a narrow-width adhesive tape, a roll of adhesive tape, and a method for manufacturing the adhesive tape, which can simplify the manufacturing process.

Means for solving the problems

An adhesive tape according to an 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 (separator), and a pickup tape having a thickness of 10 μm or more and 30 μm or less, which is terminated at the same position as a leading portion of the adhesive tape so that the first adhesive layer is not exposed at least on a leading end side of the leading portion, is provided at the leading portion of the adhesive tape.

In the adhesive tape, a pickup tape having a thickness of 10 μm or more and 30 μm or less is provided at the leading portion. By setting the thickness of the pickup tape to the above range, the thickness of the pickup tape with respect to the width of the adhesive tape can be relatively reduced. Therefore, the adhesive tape can be cut into a narrow width by the dicing process in a state where the pickup tape is attached, and the manufacturing process can be simplified. Further, since the first adhesive layer is not exposed on the leading end side of the guide portion, even when the guide portion is fixed to a roll or the like, the first adhesive layer can be prevented from being peeled off from the first release material when the guide portion is removed from the roll or the like in use.

In addition, it is also possible: the pickup tape has a second adhesive layer on one surface side of the second release member, and is fixed to the guide portion so that the second adhesive layer faces the first adhesive layer on the adhesive tape side. Thereby, the pickup tape can be firmly fixed to the adhesive tape.

In addition, it is also possible: the pickup tape has a third adhesive layer on the other surface side of the second release member, and an exposed region of the second release member exposed from the third adhesive layer is provided on the terminal end side of the guide portion. In this case, the guide portion can be fixed to the roll or the like by the third adhesive layer without using a separate seal. Further, by providing the exposed region on the terminal end side of the guide portion, the guide portion can be easily removed from the reel or the like at the time of use.

In addition, it is also possible: the pickup tape has a fourth adhesive layer on the other surface side of the second release member, and is fixed to the guide portion by attaching the second release member to the first adhesive layer on the adhesive tape side, and an exposed region of the second release member exposed from the fourth adhesive layer is provided on the terminal side of the guide portion. In this case, the guide portion can be fixed to the roll or the like by the fourth adhesive layer without using a separate seal. Further, by providing the exposed region on the terminal end side of the guide portion, the guide portion can be easily removed from the reel or the like when the adhesive tape is used. Further, by not providing an adhesive layer on one surface side of the second separate member, the overall thickness of the guide portion including the pickup tape can be suppressed. Therefore, the dicing process in a state where the pickup tape is attached can be more reliably performed.

In addition, it is also possible: the pickup tape is constituted only by the second release member, and is fixed to the guide portion by attaching the second release member to the first adhesive layer on the adhesive tape side. In this case, the entire thickness of the guide portion including the pickup tape can be further suppressed. Therefore, the dicing process in a state where the pickup tape is attached can be more reliably performed.

In addition, the adhesive layer on the pickup tape side may be colored with a color different from that of the first adhesive layer. This improves the visibility and the visibility of the pickup tape. Therefore, workability in cutting the guide portion when using the adhesive tape can be improved.

The width of the adhesive tape orthogonal to the longitudinal direction may be 0.8mm or less. When the width of the adhesive tape is 0.8mm or less, it is difficult to slit the leading portion of the adhesive tape in a state where the leading tape is attached as in the related art. Therefore, in the case where the width of the adhesive tape is 0.8mm or less, it becomes particularly useful to apply the above pickup tape.

Further, an adhesive tape winding reel according to an aspect of the present disclosure includes: the adhesive tape is wound around a winding core, and a pair of side plates facing each other with the winding core interposed therebetween, and a guide portion of the adhesive tape drawn out from the winding core is fixed to an outer surface side of the side plates.

In the reel for winding the adhesive tape, a pickup tape having a thickness of 10 μm or more and 30 μm or less is provided at a leading portion of the adhesive tape. By setting the thickness of the pickup tape to the above range, the thickness of the pickup tape with respect to the width of the adhesive tape can be relatively reduced. Therefore, the adhesive tape can be cut into a narrow width by the dicing process in a state where the pickup tape is attached, and the manufacturing process can be simplified. Further, since the first adhesive layer is not exposed on the leading end side of the guide portion, the first adhesive layer can be prevented from being peeled off from the first release material when the guide portion is removed from the roll in use.

In addition, a method of manufacturing an adhesive tape according to an aspect of the present disclosure is a method of manufacturing an adhesive tape having a first adhesive layer provided on one surface side of a first release member, in which a pickup tape having a thickness of 10 μm or more and 30 μm or less and a width equal to that of a master tape is attached to the first adhesive layer at regular intervals so that the first adhesive layer is not exposed while the adhesive tape is pulled out from the master tape, the adhesive tape to which the pickup tape is attached is slit in a longitudinal direction to be cut into a plurality of adhesive tapes, the plurality of adhesive tapes are cut in the width direction together with the pickup tape to terminate a guide portion, and then the plurality of adhesive tapes are wound around a reel.

In the method for manufacturing the adhesive tape, a pickup tape having a thickness of 10 μm or more and 30 μm or less is applied to the guide portion. By setting the thickness of the pickup tape to the above range, the thickness of the pickup tape with respect to the width of the adhesive tape can be relatively reduced. Therefore, the adhesive tape can be cut into a narrow width by the dicing process in a state where the pickup tape is attached, and the manufacturing process can be simplified. In the adhesive tape thus produced, the first adhesive layer is not exposed on the leading end side of the guide portion, and therefore, even when the guide portion is fixed to a reel or the like, the first adhesive layer can be prevented from being peeled off from the first release material when the guide portion is removed from the reel or the like in use.

Effects of the invention

According to the present invention, the manufacturing process of the adhesive tape having a narrow width can be simplified.

Drawings

Fig. 1 is a side view showing an embodiment of an adhesive tape winding roll.

Fig. 2 is a schematic cross-sectional view showing one embodiment of an adhesive tape.

Fig. 3 is a schematic view showing an embodiment of a method for manufacturing an adhesive tape.

Fig. 4 is a schematic cross-sectional view showing a modification of the adhesive tape.

Fig. 5 is a schematic cross-sectional view showing another modification of the adhesive tape.

Fig. 6 is a schematic cross-sectional view showing another modification of the adhesive tape.

Detailed Description

Hereinafter, preferred embodiments of an adhesive tape, a roll of wound adhesive tape, and a method for manufacturing an adhesive tape according to an aspect of the present disclosure will be described in detail with reference to the drawings.

Fig. 1 is a side view showing an embodiment of an adhesive tape winding roll. As shown in the figure, the adhesive tape winding reel 1 includes a core 2 around which an adhesive tape 11 is wound, and a pair of

side plates

3 and 3 facing each other with the core 2 interposed therebetween. The adhesive tape winding reel 1 is used for manufacturing, supplying, and storing the adhesive tape 11, and has a function of preventing a winding collapse of the adhesive tape 11 wound around the core 2 by the pair of

side plates

3 and 3.

The core 2 is the part around which the adhesive tape 11 is wound. The winding core 2 is made of, for example, plastic, and is formed in a ring shape having the same thickness as the width of the adhesive tape 11. In the present embodiment, the adhesive tape 11 is wound around the core 2 such that the adhesive layer 13 (see fig. 2) of the adhesive tape 11 faces inward (toward the core 2). A shaft hole (not shown) into which a winding device for winding the adhesive tape 11 around the adhesive tape winding roll 1 or a rotating shaft of a drawing device for drawing the adhesive tape 11 from the adhesive tape winding roll 1 is inserted can be attached to the hollow portion 2a of the winding core 2. The adhesive tape winding reel 1 is rotated without idling by driving the rotation shaft of the winding device or the drawing device in a state where the rotation shaft is inserted into the shaft hole.

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

A plurality of ribs 4 extending radially from the center side toward the peripheral side of the roll 1 of adhesive tape is provided on the inner surface of the side plate 3. In the example of fig. 1, 16 linear ribs 4 are provided at a phase angle of 22.5 °. The rib 4 has an arc-shaped cross-sectional shape, for example, and protrudes from the inner surface of the side plate 3 in a range of about 0.05mm to 1.00mm, for example. With such arrangement of the ribs 4, the following effects are obtained: the effects of suppressing winding collapse of the adhesive tape 11 wound around the core 2, and suppressing peeling (blocking phenomenon) of the adhesive layer 13 (see fig. 2) of the adhesive tape 11 due to collision with the side plate 3.

Next, the adhesive tape 11 will be described in detail.

Fig. 2 is a schematic cross-sectional view showing one embodiment of an adhesive tape. As shown in the figure, the adhesive tape 11 has a two-layer structure including a release member (first release member) 12 and an adhesive layer (first adhesive layer) 13 formed on one surface 12a side of the release member 12. In the present embodiment, the adhesive tape 11 exemplifies an anisotropic conductive tape for connecting members to be connected. The anisotropic conductive tape is an adhesive tape used for connecting semiconductor devices such as ICs and LSIs to various substrates such as printed wiring boards, glass substrates for LCDs, and flexible printed boards. The anisotropic conductive tape can conduct the opposing electrodes to each other, but maintain the insulating state between the adjacent electrodes.

The length of the adhesive tape 11 is, for example, 10m or more and 1000m or less. In the present embodiment, the thickness is, for example, 300 m. The adhesive tape 11 is wound around the reel 1 using the adhesive tape described above, and stored and transported in a wound state. The width of the adhesive tape 11 is for example less than or equal to 0.8mm, preferably less than or equal to 0.6 mm. The thickness of the adhesive tape 11 (the total thickness of the release agent 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, and more preferably 10 μm or more and 20 μm or less.

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

The release treatment may be performed on the other surface 12b side of the release 12. Examples of the release agent to be subjected to the release treatment include olefin release agents, low-melting point waxes such as ethylene glycol montanate, carnauba wax, and petroleum wax, low-molecular weight fluororesins, silicone surfactants, oils, waxes, resins, and silicone resins such as polyester-modified silicone resins. Generally, a 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 mixed system (mixed resin) of a thermoplastic resin and a thermosetting resin can be used. Typical examples of the thermoplastic resin include styrene resin and polyester resin. Typical examples of the thermosetting resin include epoxy resin-based, acrylic resin-based, and silicone resin-based resins.

When the adhesive tape 11 is an anisotropic conductive tape, the adhesive layer 13 may be configured to contain an adhesive component and conductive particles contained as needed. As the adhesive component, for example, a crosslinkable material is preferably used in view of wide application of a material which exhibits curability by heat or light and excellent heat resistance and moisture resistance after connection. An epoxy adhesive containing an epoxy resin as a main component as a thermosetting resin is preferable because it can be cured in a short time, has good workability in connection, and has excellent adhesiveness in a molecular structure. As the epoxy adhesive, for example, an epoxy adhesive containing, as a main component, a high molecular weight epoxy, a solid epoxy, a liquid epoxy, or an 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, and the like to the epoxy compound constituting the main component.

Examples of the conductive particles include particles of metal such as Au, Ag, Pt, Ni, Cu, W, Sb, Sn, and solder, or carbon. Further, coated particles in which the core is coated with the metal or carbon may be used, the core being made of non-conductive glass, ceramic, plastic, or the like. From the viewpoint of dispersibility and conductivity, the average particle diameter of the conductive particles is, for example, preferably 1 μm or more and 18 μm or less. In addition, insulating coated particles in which conductive particles are coated with an insulating layer may be used, and the conductive particles and the insulating particles may be used together from the viewpoint of improving the insulation between adjacent electrodes.

A pickup tape 21 is provided at a leading portion L of the adhesive tape 11 (a portion led out from the adhesive tape roll 1). As shown in fig. 1, the pickup tape 21 is drawn out from between the

side plates

3 and 3 in a state where the adhesive tape 11 is wound around the adhesive tape winding roll 1, and is fixed to the outer surface of one side plate 3 by a seal S. When the adhesive tape 11 is used, the pickup tape 21 is grasped after peeling off the seal S, and the adhesive tape 11 can be pulled out from the adhesive tape roll 1. The seal S is not particularly limited, and a general seal may be used. When the adhesive tape 11 is used, the guide portion L may be cut together with the pickup tape 21.

As shown in fig. 2, the pickup tape 21 has a two-layer structure including a release member (second release member) 22 and an adhesive layer (second adhesive layer) 23 formed on the release member 12 on the one surface 22a side. The pickup tape 21 is attached to the guide portion L in such a manner that the adhesive layer 23 faces the adhesive layer 13 on the adhesive tape 11 side. In addition, the terminal end position F2 of the pickup tape 21 coincides with the terminal end position F1 of the guide portion L of the adhesive tape 11. Thus, the adhesive layer 13 is sandwiched between the release 12 and the pickup tape 21 at the guide portion L of the adhesive tape 11, and the adhesive layer 13 is not exposed to the outside.

The length of the pickup tape 21 is a length corresponding to the guide portion L of the adhesive tape 11, and is, for example, greater than or equal to 30mm and less than or equal to 300 mm. The width of the pickup tape 21 is, for example, 0.8mm or less, preferably 0.6mm or less, and is equal to the width of the adhesive tape 11. The thickness of the pickup tape 21 (the total thickness of the release agent 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 pickup tape 21 is less than 10 μm, the pickup tape 21 is likely to curl when attached to the adhesive tape 11, and air bubbles are generated between the

adhesive layers

13 and 23. In addition, when the thickness of the pickup tape 21 exceeds 30 μm, it is difficult to cut the pickup tape 21 to a width equal to the adhesive tape 11. Therefore, if the thickness is within the above range, the generation of air bubbles can be suppressed and the cutting of the pickup tape 21 can be easily performed.

As the material of the release material 22, for example, stretched polypropylene (OPP), polyethylene terephthalate (PET), polyethylene naphthalate, polyethylene isophthalate, polybutylene terephthalate, polyolefin, polyacetate, polycarbonate, polyphenylene sulfide, polyamide, ethylene-vinyl acetate copolymer, polyvinyl chloride, polyvinylidene chloride, synthetic rubber, liquid crystal polymer, or the like can be used as in the case of the release material 12 of the adhesive tape 11.

As the material of the adhesive layer 23, for example, a silicone adhesive or an acrylic adhesive can be used. In consideration of the fact that it is required in the specification of the customer's final product that silicone is not contained, including the auxiliary materials other than the adhesive layer 13, an acrylic adhesive is preferably used as the material of the adhesive layer 23. In addition, from the viewpoint of improving the visibility and the visibility of the pickup tape 21, it is preferable that the adhesive layer 23 is colored in 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, and for example, the color of the adhesive layer 13 on the side of the adhesive tape 11 may be colorless and transparent, and the color of the adhesive layer 23 on the side of the pickup tape 21 may be blue. In the case where white PET is used as the release material 12, the release material 22 and the adhesive layer 23 of the pickup tape 21 may be black in color for comparison.

Next, a method for manufacturing the adhesive tape 11 will be described.

Fig. 3 is a schematic view showing an embodiment of a method for manufacturing an adhesive tape. As shown in the drawing, a manufacturing apparatus 101 is used for manufacturing the adhesive tape 11. The manufacturing apparatus 101 is configured to include: a drawing device 102 for the original tape P wound with the adhesive tape 11; a winding device 103 to which a plurality of adhesive tape winding reels 1 are rotatably attached; and a processing device 104 for performing dicing processing of the adhesive tape 11.

The adhesive tape 11 is drawn out from the original tape P at a constant speed from the drawing device 102. The pickup tape 21, which has the same width as the original tape P and is large in sheet thickness of 10 μm or more and 30 μm or less, is attached to the adhesive tape 11 drawn out from the drawing device 102 at regular intervals. At this time, the adhesive layer 23 of the pickup tape 21 is opposed to the adhesive layer 13 of the adhesive tape 11. Thereby, the adhesive layer 13 of the adhesive tape 11 is not exposed to the outside at the portion where the pickup tape 21 is attached.

After the pickup tape 21 is attached, the adhesive tape 11 is sent to the processing device 104. Then, the adhesive tape 11 with the pickup tape 21 attached thereto is slit in the longitudinal direction and cut into a plurality of adhesive tapes 11 having a width of 0.8mm or less. After the adhesive tape 11 is slit, the plurality of adhesive tapes 11 are cut in the width direction together with the pickup tape 21, and the leading portion L is terminated (line a-a in fig. 3). Thereby, the end position F1 of the guide portion L of the adhesive tape 11 coincides with the end position F2 of the pickup tape 21.

After the leading portion L is terminated, the plurality of adhesive tapes 11 with the pickup tape 21 attached thereto are wound around the cores 2 of the adhesive tape winding reels 1 by the winding device 103, respectively. Then, the guide portion L is drawn out from between the

side plates

3, 3 of the adhesive tape winding roll 1 and fixed to the outer surface of one side plate 3 by the seal S. Thereby, the adhesive tape 11 wound around the adhesive tape winding reel 1 as shown in fig. 1 is obtained.

As explained above, in the adhesive tape 11, the pickup tape 21 having a thickness of 10 μm or more and 30 μm or less is provided at the guide portion L. By setting the thickness of the pickup tape 21 in the above range, the thickness of the pickup tape 21 with respect to the width of the adhesive tape 11 can be relatively reduced. Therefore, the adhesive tape 11 can be cut into a narrow width by dicing in a state where the pickup tape 21 is attached, and the manufacturing process can be simplified. Further, since the adhesive layer 13 is not exposed on the leading end side of the guide portion L, even when the guide portion L is fixed to the adhesive tape winding roll 1, the adhesive layer 13 can be prevented from being peeled off from the release material 12 when the guide portion L is removed from the adhesive tape winding roll 1 in use.

In the present embodiment, the pickup tape 21 has the adhesive layer 23 on the side of the one surface 22a of the release 22, and is fixed to the guide portion L so that the adhesive layer 23 faces the adhesive layer 13 on the side of the adhesive tape 11. Thereby, the pickup tape 21 can be firmly fixed to the adhesive tape 11.

In the present embodiment, the adhesive layer 23 on the pickup tape 21 side is colored in a color different from that of the adhesive layer 13 on the adhesive tape 11 side. This improves the visibility and the visibility of the pickup tape 21. Therefore, workability in cutting the guide portion L when using the adhesive tape 11 can be improved.

In the present embodiment, the width of the adhesive tape 11 perpendicular to the longitudinal direction is 0.8mm or less. For example, in the processing device 104 for slitting the adhesive tape 11, the adhesive tape 11 is cut by overlapping an upper blade and a lower blade, but if the slit width is narrowed, the gap between the upper blade and the lower blade is also narrowed. Therefore, if the thickness of the cutting object is relatively large compared to the width, it is difficult to pass the knife through the cutting object. In this regard, for example, the upper blade can be made thin to some extent, but there is a limit to making the upper blade thin due to problems such as wear of the blade. In this case, when the width of the adhesive tape is 0.8mm or less, it is difficult to slit the guide portion of the adhesive tape in a state where the guide tape is attached as in the conventional case. Therefore, in the case where the width of the adhesive tape 11 is 0.8mm 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 guide portion L.

Various modifications of the adhesive tape may be used. Fig. 4 is a schematic cross-sectional view showing a modification of the adhesive tape. In the adhesive tape 31 shown in the figure, the configuration of the pickup tape 41 provided in the guide portion L is different from the above-described embodiment. Specifically, the pickup tape 41 has a three-layer structure including a release member (second release member) 22, an adhesive layer (second adhesive layer) 23 formed on the side of one surface 22a of the release member 22, and an adhesive layer (third adhesive layer) 43 formed on the side of the other surface 22b of the release member 22. The thickness of the pickup tape 41 (the total thickness of the release member 22, the adhesive layer 23, and the adhesive layer 43) is, for example, 10 μm or more and 30 μm or less, and 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. Similarly to the adhesive layer 23, the adhesive layer 43 may be colored in 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 guide portion L of the adhesive tape 31, but an exposure region R where the other surface 22b of the release sheet 22 is exposed from the adhesive layer 13 is provided on the terminal side of the guide portion L. The length of the exposed region R from the terminal position F2 is, for example, 5mm or more and less than 30 mm.

In such an adhesive tape 31, the adhesive tape 31 can be cut into a narrow width by dicing in a state where the pickup tape 41 is attached, and the manufacturing process can be simplified. Further, since the adhesive layer 13 is not exposed on the leading end side of the guide portion L, even when the guide portion L is fixed to the adhesive tape winding roll 1, the adhesive layer 13 can be prevented from being peeled off from the release material 12 when the guide portion L is removed from the adhesive tape winding roll 1 in use.

In the adhesive tape 31, the guide portion L may be fixed to the adhesive tape winding roll 1 by the adhesive layer 43 without separately using the seal S (see fig. 1). Further, by providing the exposed region R on the terminal end side of the guide portion L, the exposed region R serves as a grip portion when peeling off the guide portion L from the tape roll 1, and the guide portion L can be easily removed from the tape roll 1 in use.

Fig. 5 is a schematic cross-sectional view showing another modification of the adhesive tape. In the adhesive tape 51 shown in the figure, the configuration of the pickup tape 61 provided in the guide portion L is further different from the above-described embodiment. Specifically, the pickup tape 61 forms a two-layer structure composed of the release type member (second release type member) 22 and an adhesive layer (fourth adhesive layer) 63 formed on the other surface 22b side of the release type member 22. The pickup tape 61 is fixed to the adhesive tape 51 by directly attaching the one surface 22a side of the release sheet 22 to the adhesive layer 13 on the adhesive tape 51 side. The thickness of the pickup tape 61 (the total thickness of the release 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, for example, the same structure as the adhesive layer 23. That is, the adhesive layer 63 is made of the same material as the adhesive layer 23. The adhesive layer 63 is colored in a color different from that of the adhesive layer 13 on the adhesive tape 51 side. The terminal end position F2 of the pickup tape 61 coincides with the terminal end position F1 of the guide portion L of the adhesive tape 51, but an exposed region R where the other surface 22b of the release sheet 22 is exposed from the adhesive layer 63 is provided on the terminal end side of the guide portion L. The length of the exposed region R from the terminal position F2 is, for example, 5mm or more and less than 30 mm.

Even in such an adhesive tape 51, the adhesive tape 51 can be cut into a narrow width by dicing in a state where the pickup tape 61 is attached, and the manufacturing process can be simplified. Further, since the adhesive layer 13 is not exposed on the leading end side of the guide portion L, even when the guide portion L is fixed to the adhesive tape winding roll 1, the adhesive layer 13 can be prevented from being peeled off from the release material 12 when the guide portion L is removed from the adhesive tape winding roll 1 in use.

In the adhesive tape 51, the guide portion L may be fixed to the adhesive tape winding roll 1 by the adhesive layer 63 without separately using the seal S (see fig. 1). Further, by providing the exposed region R on the terminal end side of the guide portion L, the exposed region R serves as a grip portion when peeling off the guide portion L from the tape roll 1, and the guide portion L can be easily removed from the tape roll 1 in use. Further, in the adhesive tape 51, the entire thickness of the guide portion L including the pickup tape 61 can be suppressed by not providing an adhesive layer on the release liner 22 side of the pickup tape 61. Therefore, the slitting process in a state where the pickup tape 61 is attached can be more reliably performed.

Fig. 6 is a schematic cross-sectional view showing another modification of the adhesive tape. In the adhesive tape 71 shown in the figure, the configuration of the pickup tape 81 provided in the guide portion L is further different from the above-described embodiment. Specifically, the pickup tape 81 forms a single-layer structure with only the discrete piece (second discrete piece) 22. The pickup tape 81 is fixed to the adhesive tape 71 by directly attaching the one surface 22a side of the release sheet 22 to the adhesive layer 13 on the adhesive tape 71 side. When the guide portion L of the adhesive tape 71 is fixed to the adhesive tape winding reel 1, the seal S may be used as in the case of fig. 1. The thickness of the pickup tape 81 (the thickness of the release member 22) is, for example, 10 μm or more and 30 μm or less, preferably 10 μm or more and 20 μm or less.

Even in such an adhesive tape 71, the adhesive tape 71 can be cut into a narrow width by dicing in a state where the pickup tape 81 is attached, and the manufacturing process can be simplified. Further, since the adhesive layer 13 is not exposed on the leading end side of the guide portion L, even when the guide portion L is fixed to the adhesive tape winding roll 1, the adhesive layer 13 can be prevented from being peeled off from the release material 12 when the guide portion L is removed from the adhesive tape winding roll 1 in use. In addition, in the adhesive tape 71, the pickup tape 81 is formed in a single layer structure only with the release liner 22, and therefore the overall thickness of the guide portion L including the pickup tape 81 can be further suppressed. Therefore, the dicing process in a state where the pickup tape 81 is attached can be more reliably performed.

Description of the symbols

1: the adhesive tape is wound on a winding drum; 2: a winding core; 3: a side plate; 11. 31, 51, 71: an adhesive tape; 12: a separate piece (first separate piece); 12 a: one side; 13: an adhesive layer (first adhesive layer); 21. 41, 61, 81: a pickup tape; 22: an off-type member (second off-type member); 22 a: one side; 22 b: the other side; 23: an adhesive layer (second adhesive layer); 43: an adhesive layer (third adhesive layer); 63: an adhesive layer (fourth adhesive layer); l: a guide portion; r: exposing the region.

Claims

1. An adhesive tape having a first adhesive layer provided on one surface side of a first release member,

a pickup tape having a thickness of 10 [ mu ] m or more and 30 [ mu ] m or less is provided on a leading portion of the adhesive tape so as not to expose the first adhesive layer at least on a leading end side of the leading portion.

2. The adhesive tape according to claim 1, wherein the pickup tape has a second adhesive layer on one surface side of a second release member, and is fixed to the guide portion in such a manner that the second adhesive layer is opposed to the first adhesive layer on the adhesive tape side.

3. The splicing tape of claim 2, said pickup tape having a third adhesive layer on the other side of said second release member,

an exposed region where the second release member is exposed from the third adhesive layer is provided on a terminal end side of the guide portion.

4. The adhesive tape according to claim 1, the pickup tape having a fourth adhesive layer on the other surface side of a second release member and being fixed to the guide portion by attaching the second release member to the first adhesive layer on the adhesive tape side,

an exposed region of the second release member exposed from the fourth adhesive layer is provided on a terminal end side of the guide portion.

5. The adhesive tape according to claim 1, the pickup tape is constituted by only a second release member, and is fixed to the guide portion by attaching the second release member to the first adhesive layer on the adhesive tape side.

6. The adhesive tape according to any one of claims 2 to 4, wherein the adhesive layer on the pickup tape side is colored in a color different from that of the first adhesive layer.

7. The adhesive tape according to any one of claims 1 to 6, wherein the width orthogonal to the longitudinal direction is 0.8mm or less.

8. A roll for winding a splicing tape, comprising: a core around which the adhesive tape according to any one of claims 1 to 7 is wound, and a pair of side plates facing each other with the core therebetween,

the leading portion of the adhesive tape drawn out from the core is fixed to the outer surface side of the side plate.

9. A method for manufacturing an adhesive tape, which is provided with a first adhesive layer on one surface side of a first release agent,

pulling out the adhesive tape from the original tape, attaching a pickup tape having a width equal to the width of the original tape and a thickness of 10 μm or more and 30 μm or less to the first adhesive layer at regular intervals,

cutting the adhesive tape to which the pickup tape is attached into a plurality of adhesive tapes by slitting along a longitudinal direction,

the plurality of adhesive tapes are respectively wound on reels after being cut in the width direction together with the pickup tape and the leading portion is terminated.