CN101665195B - Reel for adhesive and lead-out method of adhesive reel - Google Patents

Abstract

The invention provides an adhesive tape roll (3), which has a first surface (2b) of a supporting film (2) having a first surface (2b) and a second surface (2a) opposite to it. There is the adhesive tape (20) of adhesive layer (1), and the two ends of adhesive tape (20) are wound on winding core (13) and are provided with mutually opposite winding plate (5a, 5b) On the winding core (13) of the structural body, an adhesive member is arranged on the above-mentioned second surface of the above-mentioned support film at the starting end portion of the above-mentioned adhesive tape, and the front end of the adhesive member is fixed on the second surface of the above-mentioned support film superior.

Description

A kind of adhesive tape and the drawing-out method of adhesive tape

This application is submitted on August 30, 2006, the application number is 200610121980.6, and the divisional application of the invention application named "adhesive tape roll". the

technical field

The present invention relates to an adhesive tape roll in which the adhesive tape is wound into a reel, and the adhesive tape is used for bonding and fixing electronic parts and circuit boards or circuit boards while keeping both of them It is used for electrical connection between the electrodes, and for fixing the lead frame, or bonding and fixing the semiconductor element (chip) to the mold of the lead frame, and semiconductor devices on the support substrate for mounting the semiconductor element. the

Background technique

As a component for bonding and fixing electronic components such as liquid crystal screens, PDP (plasma display screens), EL (fluorescent display) screens, bare chip mounting, etc., and circuit boards or circuit boards, and electrically connecting the electrodes of the two (Circuit connection parts), generally using adhesive tape. Such an adhesive tape generally includes a support film and an adhesive disposed thereon, but as the adhesive, in recent years, due to the anisotropic conductive adhesive in which conductive particles are dispersed in the adhesive composition, Adhesives are also suitable for high-precision circuits, so they have been widely used. the

In addition, adhesive tapes are also used for bonding lead wire fixing tapes of lead frames, LOC tapes, die bonding tapes, micro BGAs, CSPs, etc., and are also used to improve productivity and reliability of semiconductor devices as a whole. the

Japanese Unexamined Patent Publication No. 2001-284005 discloses a roll-shaped adhesive tape in which an adhesive is applied to a support film (hereinafter, simply referred to as "adhesive tape roll"). the

In such a conventional adhesive tape, the support film is peeled with silicone or the like in order to prevent the adhesive from sticking to the support film or to easily peel the adhesive from the support film. the

Furthermore, in this case, in general, the surface on which the adhesive is applied (hereinafter referred to as "coated surface") and the opposite surface (hereinafter referred to as "back surface") in the support film are adjusted in the degree of ease of peeling. have differences. That is, when the adhesive tape is wound into a reel with the adhesive on the inside to form an adhesive tape roll, one side of the back side of the support film of the previous round in contact with the adhesive is brought into contact with the application surface. It is easier to peel off than its adhesive, thereby preventing the so-called back sticking in which the adhesive tape sticks to the back of the previous turn of the support film when the adhesive tape is drawn out from the roll. the

FIG. 10 is a partially cutaway plan view showing a conventional adhesive tape roll, and FIG. 11 is a perspective view showing the adhesive tape roll of FIG. 10 . As shown in FIGS. 10 and 11 , the adhesive tape roll 300 winds the adhesive tape 20 in a roll shape on a core 13 of a structure provided with tape winding plates 5 a and 5 b at both ends of the core 13 . Here, the adhesive tape 20 is constituted by applying an adhesive layer to one side of the support film 2 . In this state, since the adhesive layer 1 shown in FIGS. 10 and 11 is not bonded to the back surface 2 a of the support film 2 , the start end 4 of the adhesive tape roll 300 is in a free state. In this state, there is a problem that, when the adhesive tape roll 300 is transported or conveyed, the winding state of the adhesive tape roll 300 becomes loose, or the adhesive tape 20 is detached from the tape winding plates 5a, 5b. Or the starting end portion of the adhesive tape 20 falls off in the gap between the tape winding plate 5a or 5b and the adhesive tape roll 300, when the starting end portion 4 of the adhesive tape 20 will be drawn out from the adhesive tape roll 300 , the adhesive tape 20 cannot be used due to the above-mentioned disadvantages. the

In addition, when used in a mass production line as circuit connecting parts, as shown in FIG. In order to prevent the winding state of the adhesive tape roll 300 from being slack when the adhesive tape roll 300 is conveyed or conveyed, it becomes a ready-to-use state. However, in this case, as shown in FIG. 12(b), compared with the coated surface 2b that has been peeled off with silicone or the like, the adhesive layer 1 is more firmly bonded to the surface that has not been treated with silicone resin or the like. Since it is on the tape winding plate 5a or 5b that has been peeled off, it is easier to peel off the support film 2 at the interface between the adhesive and the application surface 2b. When drawing out the adhesive tape 20 in this state, as shown in FIG. Belt 20 cannot be drawn out normally. the

In addition, "normally drawn out" as used here means that the adhesive layer 1 is drawn out in a state of close contact with the application surface 2b of the support film 2 as shown in FIG. 13( b ). In addition, in order to prevent this situation, although it is also considered to apply silicone treatment to the portion of the tape winding plate 5a or 5b that is bonded to the beginning end 4 of the adhesive tape, as a result of this measure, the beginning end 4 cannot Bonding becomes a free state, so it is not a solution to a problem. the

Contents of the invention

The object of the present invention is to provide an adhesive tape roll that can be transported or conveyed without loosening the wound state of the adhesive tape, and can prevent the adhesive tape from detaching from the winding plate and falling off to the adhesive tape. Between the reel and the tape reel, while the adhesive tape can be drawn out normally, the transfer to the tape reel can be prevented. the

In order to solve the above problems, the present invention provides an adhesive tape roll comprising an adhesive having an adhesive layer provided on the first surface of a support film having a first surface and a second surface opposite thereto. Tape, the above-mentioned adhesive tape is wound on the above-mentioned winding core of the structure of the tape winding plate facing each other at both ends of the winding core, and it is characterized in that the above-mentioned support at the starting end of the above-mentioned adhesive tape An adhesive member is provided on the second surface of the film, and the front end of the adhesive member is fixed on the second surface of the supporting film. the

According to the adhesive tape roll of the present invention, since the beginning end of the adhesive tape can be bonded to, for example, the second surface of the support film of the previous round of adhesive tape by the adhesive member, the Or during conveyance, the winding state of the adhesive tape roll does not loosen, and the adhesive tape does not come off from the tape winding plate. In addition, since the beginning end of the adhesive tape does not come off the gap between the take-up plate and the adhesive tape roll, it is possible to prevent the unwinding from being unusable due to the above-mentioned inconvenience. In addition, in order to prevent the adhesive tape from being slack in its wound state, an adhesive member is used to adhere to the edge of the tape winding board instead of the beginning end of the adhesive tape. Therefore, separation of the support film and the adhesive layer of the adhesive tape does not occur when the adhesive member is peeled off from the tape take-up plate. That is, it is possible to sufficiently prevent the transfer of the adhesive layer to the tape reel. Therefore, the adhesive tape can be drawn out normally. the

In the adhesive tape roll, it is preferable that an area of a contact portion between the support film and the adhesive member at the beginning of the adhesive tape is 20 mm ² or more.

According to this adhesive tape roll, when it is used for circuit connection, it is possible to obtain an adhesive force that can withstand the tensile strength at the time of unwinding as much as possible. Therefore, the adhesive tape roll can prevent the occurrence of a problem in which the adhesive member comes off from the adhesive tape during use, and is also effective for mechanization of unwinding. the

In the above-mentioned adhesive tape, it is preferable that a non-adhesive member is further provided at a starting end of the above-mentioned adhesive member. the

In this case, since the non-adhesive member is in a free state without being bonded to the previous adhesive tape, it can be caught easily. Therefore, the adhesive tape can be easily drawn out through the non-adhesive member, and the non-adhesive portion is also useful as a gripping end when unwinding by a machine depending on the situation. the

The above-mentioned adhesive tape roll has a plurality of the above-mentioned adhesive members, the plurality of adhesive members are arranged along the extension line of the above-mentioned adhesive tape, and the adjacent adhesive members may be connected by a non-adhesive connecting member. . In this case, a non-adhesive member may be provided at the start end of the adhesive member farthest from the adhesive tape among the plurality of adhesive members. the

In the above-mentioned adhesive tape roll, it is preferable that the above-mentioned adhesive member has an adhesive surface that can be bonded to the second surface on only one side, and the front end of the above-mentioned adhesive member is folded back so that the above-mentioned adhesive surfaces are mutually connected. Opposite, and a part of bonding surface is bonded on above-mentioned second face. In this case, the surface of the adhesive member opposite to the adhesive surface becomes a non-adhesive surface, and a part of the adhesive surface becomes a non-adhesive surface by folding back the front end portion of the adhesive member. In this case, the non-adhesive portion can be easily formed without using a non-adhesive member that is not integral with the adhesive member. the

According to the adhesive tape roll of the present invention, the wound state of the adhesive tape can be transported or conveyed without slack, and it is possible to prevent the adhesive tape from detaching from the tape winding board and being transferred to the adhesive tape roll and the tape winding board. It can prevent the transfer to the reel plate while the adhesive tape can be drawn out normally. the

Description of drawings

Fig. 1 is a view showing a first embodiment of the adhesive tape roll of the present invention, Fig. 1(a) is a partially cut-away plan view, and Fig. 1(b) is an enlarged side view showing the beginning end of the adhesive tape roll . the

Fig. 2 is a view showing the first embodiment of the adhesive tape roll of the present invention, Fig. 2(a) is a partial cross-sectional plan view showing an example of a bonding method of an adhesive member, and Fig. 2(b) is a plan view showing an adhesive A top view of an alternative bonding method for joint components. the

Fig. 3 is a graph showing the relationship between the length of the bonding portion and the tensile strength of the adhesive tape bonded to the beginning of the adhesive tape. the

4 is a partially cutaway plan view showing a second embodiment of the adhesive tape roll of the present invention. the

Fig. 5 is a side view of the front end of the adhesive tape roll of Fig. 4 . the

Fig. 6 is a plan view showing a third embodiment of the adhesive tape roll of the present invention. the

7 is a partially cutaway plan view showing a fourth embodiment of the adhesive tape roll of the present invention. the

Fig. 8 is a partial side view showing the adhesive tape roll of Fig. 7 . the

Fig. 9 is a partially cutaway plan view showing a modified example of the adhesive tape roll of Fig. 4 . the

Fig. 10 is a partially cutaway plan view showing a conventional adhesive tape roll. the

Fig. 11 is a perspective view showing a conventional adhesive tape roll. the

Fig. 12 is a top view showing a conventional adhesive tape reel, and Fig. 12 (a) shows a state in which the beginning end of the adhesive tape is bonded to the tape reel, and Fig. 12 (b) shows the state in Fig. 12 (a) ) state caused by adverse conditions. the

FIG. 13 is a plan view showing a conventional adhesive tape roll, FIG. 13( a ) shows a problem caused in the state of FIG. 12( a ), and FIG. 13( b ) shows a state where the problem does not occur. the

Detailed ways

Embodiments of the adhesive tape roll of the present invention will be described in detail below. the

first implementation

Fig. 1 is the figure that shows the first embodiment of the adhesive tape roll of the present invention, Fig. 1 (a) is the plan view that shows the partial section of the first embodiment of the adhesive tape roll of the present invention, Fig. 1 (b) ) is an enlarged side view showing the vicinity of the starting end of the adhesive tape. the

As shown in FIG. 1(a) or FIG. 1(b), the adhesive tape roll 3 is provided on the core 13 of a structure in which the tape rolls 5a, 5b are arranged to face each other at both ends of the core 13, It is formed by winding the adhesive tape 20 in a roll shape. In other words, the adhesive tape 20 is wound around the winding core 13 with the adhesive layer 1 inside, and the adhesive tapes 20 overlap each other. The adhesive tape 20 is constituted by applying an adhesive to an applied surface (first surface) 2 b which is one side of the support film 2 to form an adhesive layer 1 . In addition, a release treatment is performed on the back surface (second surface) 2a of the support film using silicone resin or the like. Furthermore, an adhesive member 7 is provided on the back surface 2 a of the support film 2 . Here, the adhesive member 7 can be bonded on the back side 2a of the support film 2, as shown in the figure, usually a part of the adhesive member 7 is bonded on the back side 2a of the support film 2, and the remaining part is bonded from the adhesive tape 20. The beginning and end are prominent. In addition, the adhesive member 7 may be an adhesive member having adhesiveness only on one side, or may be an adhesive member having adhesiveness on both sides. the

The adhesive tape roll 3 is obtained by providing an adhesive member 7 having an adhesive surface that can also be bonded to a support film 2 that is peeled off by silicone resin or the like on the starting end portion 4 of the adhesive tape 20. . Specifically, the adhesive tape roll 3 can be obtained by bringing a part of the adhesive surface of the adhesive member 7 into contact with the back surface 2 a of the support film 2 at the starting end 4 of the adhesive tape 20 and bonding it. the

In addition, although it is also conceivable to provide the adhesive member 7 on the side of the adhesive layer 1 in the starting end portion 4 of the adhesive tape 20, the adhesive tape 20 depends on the method of use in order to stick it on the After bonding to the object, only the support film 2 is peeled off, and the peeling force between the support film 2 and the adhesive layer 1 is set to be relatively small. Therefore, when the adhesive member 7 is provided on the adhesive layer 1, the adhesive layer 1 and the adhesive member 7 are tightly adhered to each other, and when the adhesive tape 20 is pulled out, the adhesive layer 1 may be pulled from the support. Film 2 peeled off. the

In addition, in the case of such a structure, when using the above-mentioned adhesive member having adhesiveness only on one side as the adhesive member 7, when the adhesive member 7 is to be attached to the adhesive tape 20, the adhesive The adhesive surface of the bonding member 7 is bonded toward the adhesive layer 1 side of the adhesive tape 20 . That is, the non-adhesive surface which does not have adhesiveness faces the back surface 2a side of the support film 2. As shown in FIG. Therefore, when the adhesive member 7 is bonded to the support film back 2a of the previous circle, the bonding surface of the adhesive member 7 must be twisted 180 ° to paste. In addition, it is not practical due to reasons such as the case where the adhesive tape 20 is peeled off from the support film 2 at this time. the

For the reasons described above, the adhesive member 7 is provided on the back surface 2a side of the support film 2 at the starting end portion 4 of the adhesive tape 20 . the

According to the adhesive tape roll 3 of the first embodiment, the following effects can be obtained. That is, as shown in FIG. 1(a) or FIG. 1(b), by providing an adhesive on the support film back (second face) 2a that can be bonded to the support film 2 using silicone or the like that has been peeled off, Bonding member 7, then as shown in Fig. 2 (a), can make the front end (hereinafter referred to as "adhesive part front end") 8 of bonding member 7 be bonded on the back surface 2a of supporting film and be fixed. Thereby, the starting end portion 4 of the adhesive tape 20 can be fixed without being free. the

Furthermore, according to the adhesive tape roll 3 of this embodiment, as shown in FIG. 2( b ), the tip 8 of the adhesive portion may be pasted and fixed to, for example, the tape winding plate 5 a. the

In this way, even if the back surface 2a of the support film is peeled with silicone resin or the like, the starting end 4 of the adhesive tape 20 can be bonded to the back surface 2a of the support film 2 or the take-up plates 5a, 5b. Therefore, the wound state of the adhesive tape roll 3 does not become loose during conveyance and/or conveyance, and the adhesive tape 20 does not come off from the tape winding plate 5a. Moreover, since the beginning end portion 4 of the adhesive tape 20 does not fall off the gap between the tape winding plate 5a and the adhesive tape roll 3, it is possible to prevent the above-mentioned failure when the adhesive tape 20 is used. situation and cannot be used. the

In addition, when the adhesive member 7 bonded to the edge of the tape winding board 5a, 5b is peeled off from the tape winding board 5a, 5b, what is bonded to the edge of the tape winding board 5a, 5b is not the adhesive tape. 20 is the bonding part 7 instead. Therefore, the support film 2 and the adhesive layer 1 of the adhesive tape 20 do not separate. That is, it is possible to sufficiently prevent the transfer of the adhesive layer to the tape take-up plates 5a, 5b. Therefore, the adhesive tape 20 can be drawn out normally. the

Here, as a method of drawing out the adhesive tape 20 from the adhesive tape 3, it is conceivable to adopt a manual method or a mechanical method. In particular, in the case of the circuit connection parts used in the fields of liquid crystal screens or PDPs as described in the prior art, since the force when the adhesive tape 20 is pulled out from the tape roll 3 is at least about 500 gf, it can be considered that the adhesion The component 7 can withstand this tensile strength, ie it cannot be detached from the adhesive strip 20 even with this tensile strength. the

Therefore, the present inventors conducted studies and experiments on the relationship between the tensile strength and the length L of the bonded portion. The experiment was carried out as follows: prepare two adhesive tapes 20, connect them with the adhesive member 7, stretch the two in opposite directions to each other, and obtain the tensile strength when the adhesive member 7 is peeled off from the adhesive tape 20. strength. This tensile strength is obtained by variously changing the length L along the longitudinal direction of the bonding portion of the bonding member 7 bonded to the adhesive tape 20 . The results are shown in FIG. 3 . As can be seen from FIG. 3 , the curve showing the relationship between the tensile strength and the length L of the bonded portion intersects the straight line with the tensile strength of 500 gf. It can be seen from this that, in the case of an adhesive tape 20 with a width of 1 mm, if the bonding portion has a length of 15 mm or more, that is, if the area is ¹⁵ mm or more, the tensile strength is 500 gf or more, and the bonded parts 7 The adhesive tape 20 can be pulled out normally without peeling off from the adhesive tape 20 .

Therefore, the area of the contact portion between the adhesive member 7 and the back surface 2a of the support film is preferably 15 mm ² or more.

In this case, when the adhesive tape 20 is drawn out from the adhesive tape roll 3, the adhesive force of the adhesive member 7 becomes stronger than that of the case where the area of the contact portion is less than ¹⁵ mm with respect to the drawing force. big. Therefore, the situation that the adhesive member 7 is peeled off from the back surface 2 a of the support film of the adhesive tape 20 can be prevented. The length L of the bonding portion, when considering the fluctuation (the fluctuation of the tensile strength value relative to the length L of the bonding portion), is more preferably 20 mm or more, that is, the contact portion of the adhesive tape 20 and the bonding member 7 has a thickness of 20 mm. ² or more, it is preferable that the contact portion is 25 mm ² or more (that is, in the case of a width of 1 mm, the length is 25 mm or more).

In addition, this index is an index when the application of the adhesive tape 20 is a circuit connection part, and when the application is not a circuit connection part, the required tensile strength is 500gf or less or the case of the adhesive tape 20. When the width is very narrow or wide, it is not limited to 15 mm ² depending on the peelability of the support film 2 and the like. In this case, the length L or the area of the bonding portion (the area of the contact portion between the bonding member and the adhesive tape) can be determined by referring to the results of the same test as in FIG. 3 .

Next, each constituent element of the above-mentioned adhesive tape roll 3 will be described in more detail. the

As the support film 2, OPP (stretched polypropylene), polytetrafluoroethylene, PET (polyethylene terephthalate), etc. are suitably used in terms of strength and adhesive peelability. Surface treatment (release treatment) is applied to the back surface 2a with a mold release agent. the

As the above-mentioned release agent, olefin-based release agents, ethylene glycol montanate, carnauba wax, petroleum-based waxes and other low-melting waxes, low-molecular-weight fluororesins, silicone-based or fluorine-based surfactants, petroleum , wax, resin, polyester-modified silicone resin, etc., especially silicone resin is generally used. the

The adhesive layer 1 generally includes a resin such as a thermoplastic resin, a thermosetting resin, or a mixed system (hybrid resin) of a thermoplastic resin and a thermosetting resin. Representative examples of these resins include the following. Examples of thermoplastic resins include styrene resins and polyester resins, and examples of thermosetting resins include epoxy resins, acrylic resins, and silicone resins. the

The adhesive layer 1 may be a so-called anisotropic conductive adhesive used in the fields of liquid crystal panels, PDPs, and the like. That is, the adhesive 1 may include, in addition to the above-mentioned resin, conductive particles dispersed in the above-mentioned resin. Examples of such conductive particles include metal particles made of metals such as Au, Ag, Pt, Ni, Cu, W, Sb, Sn, and solder, or carbon particles made of carbon materials such as carbon and graphite. Alternatively, the conductive particles may be composite particles in which a nonconductive polymer core material such as glass, ceramics, or plastic is coated with a conductive layer of the metal or the like. In addition, the conductive particles may be a mixture of the above-mentioned metal particles, carbon particles, and composite particles. Furthermore, in the adhesive bond layer 1, the said conductive particle and insulating particle can also be used together. the

In addition, when the adhesive bond layer 1 does not need to be an anisotropic conductive adhesive, you may use the insulating coating particle which covered the above-mentioned conductive particle with an insulating layer instead of a conductive particle. the

The adhesive member 7, as long as it can be bonded to the support film back 2a and the take-up plates 5a, 5b that are peeled off by silicone resin etc. The peeled adhesive force is not particularly limited, and generally available ones can be used. However, as the adhesive member 7, a member having adhesiveness on only one side is suitably used in view of good operability. the

As such an adhesive member 7, for example, a silicone-based adhesive similar to the above-mentioned mold release agent can be used. As the adhesive member 7, in the case of using an adhesive member having adhesiveness on only one side, it is preferable to use an adhesive that applies the above-mentioned silicone-based adhesive or the like to one side of a non-adhesive film. Pick up. The width of the adhesive tape is usually the same as that of the adhesive tape, but it does not have to be the same width as long as it does not interfere with the tape winding plates 5a, 5b. the

And, as shown in Figure 1 (b), the length of the portion (contact portion) 7a (the length in the direction of extension of the bonding member 7) that is in contact with the back surface 2a of the adhesive tape 20 (the length in the direction of extension of the bonding member 7), according to the curve of Figure 3, When the width of the contact portion is 1 mm, it is preferably a length that can withstand a pull-out strength of 500 gf, that is, 15 mm or more. That is, the area of the contact portion is preferably 15 mm ² or more. In addition, when the width is 2 mm, the length of the contact portion may be approximately 7 to 8 mm. As described above, the length of the contact portion 10a can be changed according to the width or use of the contact portion.

The attachment of the adhesive member 7 to the back surface 2a of the adhesive tape 20 can be performed by winding the adhesive tape 20 into a roll with the adhesive member 7 previously cut into a desired width and length. The predetermined contact portion 7a is pasted on the start end portion 4 for attachment. the

Second Embodiment

Next, a second embodiment of the adhesive tape roll of the present invention will be described. the

As shown in FIGS. 4 and 5 , the adhesive tape roll 30 of the present embodiment is different from the above-mentioned first one in that the front end 8 of the adhesive member 7 is provided with a non-adhesive member 9 as a non-adhesive portion. The adhesive tape roll 3 of the embodiment is different. Specifically, the adhesive tape roll 30 of the present embodiment differs from the adhesive tape roll 3 of the first embodiment in that the non-adhesive member 9 is bonded to the tip portion 8 of the adhesive member 7 . the

Here, the material of the non-adhesive member 9 can be used as long as it can be sufficiently bonded to the adhesive member 7 and has a thickness and rigidity that do not hinder the formation of the adhesive tape roll. Furthermore, the width of the non-adhesive member 9 is usually set to be the same as that of the adhesive member 7, but it does not have to be the same as long as it is within the range not to interfere with the tape winding plates 5a and 5b. the

In the adhesive tape roll 30 of the second embodiment, while obtaining the same effect as that of the adhesive tape roll 3 of the first embodiment, since a non-adhesive member is provided at the tip portion 8 of the adhesive member 7 9. Therefore, while the adhesive member 7 can be bonded to the support film back 2a of the previous circle of the adhesive tape 20, only the non-adhesive member 9 as the initial end portion is not bonded to the support film back 2a into a state of freedom. Thus, when the adhesive tape 20 is drawn out from the tape roll 30, the non-adhesive member 9 as the front end can be easily caught, and the starting end 11 of the non-adhesive member 9 can be easily pulled out from the support. The film back surface 2a peels off the adhesive member 7, and as a result, the adhesive tape 20 can be pulled out easily. Therefore, the preparatory work when using the adhesive tape roll can be completed accurately and in a short time. the

In the case where the non-adhesive member 9 has been peeled off in the same manner as the support film 2, similar to the experiment on the relationship between the tensile strength of the above-mentioned adhesive member 7 and the length L of the contact portion 7a, in order to obtain a minimum resistance of 500gf The tensile strength is preferably such that the contact area between the non-adhesive member 9 and the adhesive member 7 is 15 mm ² or more. However, unlike the support film 2, the non-adhesive member 9 used here does not need to be specially subjected to a peeling process because the adhesive layer 1 is not provided or it is not wound into a roll. Therefore, if the non-adhesive member 9 is not peeled off, the contact area does not need to be 15mm ^or more, and the length L or area of the contact portion 7a can be determined with reference to the results of the same experiment as in FIG. 3 .

In addition, as the adhesive member 7, in the case of using an adhesive member having adhesiveness only on one side, a part of the adhesive surface is bonded to the back surface 2a of the support film, and the side opposite to the adhesive surface of the adhesive member 7 is The surface is a non-adhesive surface. Therefore, by folding back the front end portion 8 of the adhesive member 7 so that the adhesive surfaces face each other, a part of the adhesive surface becomes a non-adhesive surface. In this case, the non-adhesive portion can be easily formed without using a non-adhesive member that is not integral with the adhesive member. In addition, it becomes easy to pull out the adhesive tape. the

In addition, the present invention is not limited to the above-mentioned embodiments. For example, in the above-mentioned second embodiment, although the non-adhesive member 9 and the adhesive tape 20 are connected by only one adhesive member 7, as shown in FIGS. 7 and 8, the non-adhesive member 9 and the adhesive tape The strap 20 can also be connected by a plurality of adhesive members 7 . In this case, a plurality of bonding members 7 are prepared, and these are arranged in series along the extension line of the adhesive tape 20, and then the adjacent bonding members 7 are connected by a connecting tape (connecting member) 12, so that The non-adhesive member 9 is bonded to the beginning of the adhesive member 7 that is farthest from the adhesive tape 20 . Here, the connection tape 12 may be a non-adhesive tape as long as it can connect the adhesive members 7 . As such a connecting tape 12, for example, PET or paper can be used. Moreover, this adhesive tape roll can be effectively applied to the following situation, that is, for the adhesive tape is installed on the machine and unrolled, until a certain length of the starting end is set on the mechanical winder parts, when a part without adhesive is required. the

In addition, in the above-mentioned second embodiment, as shown in FIG. 9 , the front end 11 of the non-adhesive member 9 may protrude outside the space between the tape winding plate 5 a and the tape winding plate 5 b. In this case, when pulling out the adhesive tape 20, the front end 11 can be easily grasped. the

Example

Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to the following examples. the

First, an example of producing an adhesive tape will be described. the

Example 1

As a film forming material, 50 g of phenoxy resin (high molecular weight epoxy resin), 50 g of acrylate, and 5 g of peroxide were added to ethyl acetate to prepare a 30% by weight resin ethyl acetate solution, and 50 g of resin was added to the solution. Volume % of Ni powder with an average particle diameter of 2.5 μm. On the other hand, a 50-μm-thick PET film (UH2: manufactured by Teijin DuPont Films Co., Ltd.) was prepared as a support film, both sides of which were peeled with a silicone resin. Then, the obtained solution was coated on one side of the above-mentioned PET film by a roll coating method. the

Next, it was dried in air at 110° C. for 20 minutes to obtain an anisotropic conductive adhesive film in which an adhesive layer with a thickness of 50 μm was provided on one surface of the support film. Furthermore, this adhesive film was cut into width 1mm, and the adhesive tape was obtained. the

On the one hand, a winding core having a width of 1.5 mm, an inner diameter of 40 mm, and an outer diameter of 65 mm was prepared. On the other hand, two ring-shaped winding plates made of plastic with a thickness of 2 mm, an inner diameter of 40 mm, and an outer diameter of 125 mm were prepared. Then, the ends of the winding cores were fitted into the respective openings of the two winding plates to obtain structures. Next, the above-mentioned adhesive tape is wound into a roll with the adhesive surface on the inside with respect to the winding core of the structure. the

Subsequently, an adhesive member (adhesive tape: manufactured by Teraoka Seisakusho Co., Ltd.) cut in advance with a width of 1 mm × length 30 mm × thickness 55 μm was bonded to the back of the support film at the beginning of the adhesive tape to make it Overlap by 15 mm in the length direction (that is, make the area of the contact portion 15 mm ² ).

Produced as described above, an adhesive tape roll in which an anisotropically conductive adhesive tape having a length of 50 m and a width of 1 mm was wound around a core of the structure in a roll shape was obtained. the

Example 2

It was produced in the same manner as in Example 1, except that the overlap between the adhesive member and the back surface of the support film at the beginning of the adhesive tape in the longitudinal direction was 10 mm (that is, the area of the contact portion was 10 mm ² ). An adhesive tape roll was obtained.

Example 3

Production was carried out in the same manner as in Example 1, except that the overlap between the adhesive member and the back surface of the support film at the starting end of the adhesive tape in the longitudinal direction was 20 mm (that is, the area of the contact portion was 20 mm ² ). A roll of adhesive tape was obtained.

Example 4

In addition to making the adhesive member width 1 mm x length 60 mm x thickness 55 μm, and overlapping it with the back side of the support film at the beginning of the adhesive tape by 20 mm in the length direction (that is, the area of the contact portion is made 20 mm ² ), PET (U2: Teijin DuPont Film Co., Ltd.) that has not been peeled off as a non-adhesive material is cut into a width of 1 mm x a length of 40 mm x a thickness of 50 μm, and the non-adhesive material is bonded to the front end of the adhesive member to make it An adhesive tape roll was produced in the same manner as in Example 1 except that it overlapped with the adhesive member by 10 mm in the longitudinal direction (that is, the area of the contact portion was made 10 mm ² ).

Comparative example 1

Except that no adhesive member is provided at the beginning end of the anisotropic conductive adhesive tape obtained in Example 1, after the adhesive tape is wound, the beginning end of the adhesive tape is placed as it is, and the other is the same as in the embodiment. Example 1 was produced in the same manner to obtain an adhesive tape roll. the

Comparative example 2

Except that instead of sticking the adhesive member on the back side of the support film of the adhesive tape, it is adhered to the surface of the adhesive so that it overlaps by 20 mm (that is, the area of the contact part is made 20 mm ² ), the other and the implementation Example 1 was produced in the same manner to obtain an adhesive tape roll.

Next, the results of the above-mentioned Examples and Comparative Examples were evaluated. the

Prepare 10 rolls each of the adhesive tape rolls obtained in Examples 1-4 and Comparative Examples 1-2, and use the adhesive parts in Examples 1-4 and the adhesive layer in Comparative Examples 1-2 on the The film was left to stand in an environment of 23° C. for 10 days in a state pasted on the back surface of the tape winding board and the previous support film, and the operability was evaluated. The results are shown in Table 1. In addition, in Table 1, each Example and a comparative example are divided into upper and lower stages, and the upper stage shows the adhesiveness of the beginning part, and the lower stage shows the pull-out property of an adhesive tape. the

As shown in Table 1, in Examples 1 to 4, the adhesiveness at the starting end was good, and the adhesive tape was not peeled off, and the starting end was removed. Furthermore, the pull-out property was also good, and the adhesive tape could be pulled out normally without peeling off at the time of pull-out. In Example 2, since the overlapping area of the adhesive member was 10 mm ² , the adhesive member was peeled off only once when pulling out, but the adhesive tape was not peeled off, and it could be pulled out as usual.

In Comparative Example 1, since no adhesive member was provided, none of them could be adhered to the support film. Therefore, slack of the coil and detachment of the tape occurred, and six of them were not drawn out normally. In addition, although all of them could be adhered to the tape reel, the adhesive tape was completely peeled off when it was pulled out due to the adhesion to the tape reel. the

In Comparative Example 2, since the adhesive member was pasted on the surface of the adhesive layer, most of the adhesive tape peeled off when the starting end was fixed or pulled out. the

Table 1

Table 1,

Claims (5)

1. An adhesive tape roll, equipped with an adhesive tape having an adhesive layer on the above-mentioned first face of a support film having a first face and a second face opposite to this, the above-mentioned bonding The agent tape is wound on the above-mentioned winding core of the structure with tape winding plates facing each other at both ends of the winding core, and is characterized in that: A plurality of adhesive members are provided on the second surface of the above-mentioned support film at the starting end portion of the above-mentioned adhesive tape, and the above-mentioned plurality of adhesive members are arranged along the extension line of the above-mentioned adhesive tape, and are connected by connecting members. between the adhesive members, and the front end of the adhesive member farthest from the adhesive tape along the extension line of the adhesive tape is fixed on the second surface of the support film. 2. The adhesive tape roll according to claim 1, characterized in that: An area of a contact portion between the support film and the plurality of adhesive members at the starting end portion of the adhesive tape is 20 mm ² or more. 3. The adhesive tape roll according to claim 1 or 2, characterized in that: The width of the plurality of adhesive members is the same as the width of the adhesive tape. 4. The adhesive tape roll according to claim 1, characterized in that: A non-adhesive member is further provided at the tip of the adhesive member farthest from the adhesive tape among the plurality of adhesive members. 5. A method for drawing out an adhesive tape, characterized in that, The adhesive tape is drawn out through the non-adhesive member of the adhesive tape roll according to claim 4 .

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