JP6377224B1 - Double-sided adhesive tape for fixing web material and adhesive tape with double-sided separator - Google Patents

Abstract

The present invention provides a double-sided pressure-sensitive adhesive tape that can be easily peeled from either side separator. A double-sided pressure-sensitive adhesive tape has a long base material 10, a first adhesive layer 11 and a first separator 12 laminated on a first surface of the base material, and a second surface of the base material. The second adhesive layer 13 and the second separator 14 are laminated, and the release force of the first separator with respect to the first adhesive layer is greater than the release force of the second separator with respect to the second adhesive layer. The first separator has a first protrusion 12a protruding in the width direction with respect to the first adhesive layer, and the second separator is in the width direction with respect to the second adhesive layer. The second projecting portion 14a projecting into the first projecting portion 14a is formed, and the second projecting portion is formed with an easy-to-cut portion 20 that is easily cut in the width direction along the longitudinal direction. [Selection] Figure 1

Description

  The present invention relates to a double-sided pressure-sensitive adhesive tape for fixing a web material and a pressure-sensitive adhesive tape with a double-sided separator used when winding a web material on a winding core.

  In order to wind up a web material such as a film or a sheet in a roll shape, a method is generally used in which the tip of the web material is fixed to the outer peripheral surface of a cylindrical winding core with a double-sided adhesive tape, and then the winding core is rotated and wound. It has been.

  By the way, since the surface of the core is generally hard, when a web material having plasticity is wound into a roll, a step is generated between the outer peripheral surface of the core and the winding end of the web material. An irreversible deformation occurs in the web material wound around the web due to the level difference. And since the same deformation is transferred to the web material wound around the deformed web material, there is a problem that irreversible step marks such as distortion occur in the web material over several tens of laps from the beginning of winding. . Generation | occurrence | production of such a level | step difference will reduce the flatness of a web material, and has become a cause of a product loss and cost increase.

  In order to reduce the occurrence of such step marks, Patent Document 1 discloses a technique of providing a cushioning material on the outer peripheral surface of the core. According to this technique, since the step by the thickness of a web material is relieve | moderated because the winding edge part of a web material sinks in a buffer material, a level | step difference trace can be reduced.

JP 2005-1624378 A

  The web material wound around the winding core is used again after being unwound from the winding core. When the web material is peeled off from the winding core together with the double-sided adhesive tape, the web material is provided on the outer peripheral surface of the winding core. The cushioning material may be damaged by the double-sided adhesive tape. In this case, since the core cannot be reused in a state where the surface of the cushioning material is damaged, it is necessary to replace it with a new cushioning material.

  When peeling off the web material from the core, in order not to damage the surface of the cushioning material, as the double-sided adhesive tape, the side to be affixed to the core is formed with a weak adhesive layer and affixed to the web material It is conceivable to form the side with a strong adhesive layer. Thereby, a web material can be smoothly peeled off from a winding core with a double-sided adhesive tape. As a result, the surface of the cushioning material can be prevented from being damaged when the web material is peeled from the core.

  At this time, when a double-sided pressure-sensitive adhesive tape in which a separator is provided on each double-sided adhesive layer is used as the double-sided pressure-sensitive adhesive tape, the release force of the separator provided on the weak adhesive layer side is separated from the separator provided on the strong adhesive layer side. It is necessary to make it weaker than typing power. As a result, the separator provided on the weak adhesive layer side is first peeled off, the weak adhesive layer side of the double-sided adhesive tape is attached to the core surface, and then the separator provided on the strong adhesive layer side is peeled off to provide a strong adhesive. The tip of the web material can be affixed to the layer.

  On the other hand, when using a double-sided adhesive tape with a weak adhesive layer on the side that is attached to the core and a strong adhesive layer on the side that is attached to the web material, when the web material is rewound from the core, the double-sided adhesive is applied to the web material. Tape is attached. For this reason, it is necessary to cut the end portion of the web material to which the double-sided pressure-sensitive adhesive tape is attached before transferring to the next processing step, which causes an inconvenience that extra work is required.

  In addition, when the web material is rewound from the core, there is another demand to leave the double-sided adhesive tape on the core side and repeatedly use the double-sided adhesive tape.

  In order to leave the double-sided adhesive tape on the surface of the core when the web material is rewound from the core, as the double-sided adhesive tape, the side to be affixed to the core is formed with a strong adhesive layer. It is conceivable to form the side to be bonded with a weak adhesive layer. At this time, when a double-sided pressure-sensitive adhesive tape having a separator on each pressure-sensitive adhesive layer is used as the double-sided pressure-sensitive adhesive tape, the release force of the separator provided on the strong pressure-sensitive adhesive layer side is separated from that of the separator provided on the weak pressure-sensitive adhesive layer side. It is necessary to make it weaker than typing power. As a result, the separator provided on the strong adhesive layer side is first peeled off, the strong adhesive layer side of the double-sided adhesive tape is attached to the core surface, and then the separator provided on the weak adhesive layer side is peeled off to provide a weak adhesive. The tip of the web material can be affixed to the layer.

  However, when using a double-sided pressure-sensitive adhesive tape with a separator on each side of the double-sided adhesive layer, the separator is difficult to peel off only from the side with weak release force. It is necessary to determine in advance whether the adhesive layer to be attached to the side is a weak adhesive layer or a strong adhesive layer. However, in the conventional double-sided pressure-sensitive adhesive tape in which a separator is provided on each of the double-sided pressure-sensitive adhesive layers, there is no double-sided pressure-sensitive adhesive tape that can be easily peeled off from either side of the pressure-sensitive adhesive layer.

  The present invention has been made in view of the above points, and the main purpose of the double-sided pressure-sensitive adhesive tape for fixing a web material to be used when the web material is wound around a winding core is the separator on either side of the pressure-sensitive adhesive layer. However, it is in providing the double-sided adhesive tape which can be peeled off easily.

  The double-sided pressure-sensitive adhesive tape for fixing a web material according to the present invention is a double-sided pressure-sensitive adhesive tape for fixing a web material used when a web material is wound around a winding core, and includes a long base material and a first base material. A first pressure-sensitive adhesive layer and a first separator laminated on the surface, and a second pressure-sensitive adhesive layer and a second separator laminated on the second surface of the substrate, the first separator of the first separator The release force with respect to the adhesive layer is smaller than the release force with respect to the second adhesive layer of the second separator, and the first separator protrudes in the width direction with respect to the first adhesive layer. The second separator has a second protrusion that protrudes in the width direction with respect to the second adhesive layer, and the second protrusion has a width direction along the longitudinal direction. The easy cutting part which provided easy cutting property of is formed.

  According to the present invention, there is provided a double-sided pressure-sensitive adhesive tape that can be easily peeled off from the separator on either side of the pressure-sensitive adhesive layer in a double-sided pressure-sensitive adhesive tape for fixing a web material used when winding a web material on a core. be able to.

It is the figure which showed typically the structure of the double-sided adhesive tape for web material fixation in one Embodiment of this invention. It is the figure which showed the procedure which peels off the 1st separator provided in the 1st adhesion layer side. (A), (b) is the figure which showed the procedure which peels off the 2nd separator provided in the 2nd adhesion layer side. (A)-(d) is the figure which showed the procedure which winds up a web material around a winding core using the double-sided adhesive tape in this embodiment, and rewinds a web material from a winding core after that. (A)-(d) is the figure which showed the other procedure which winds up a web material around a winding core using the double-sided adhesive tape in this embodiment, and rewinds a web material from a winding core after that.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to the following embodiment. Moreover, it can change suitably in the range which does not deviate from the range which has the effect of this invention.

  FIG. 1 is a diagram schematically showing the configuration of a double-sided pressure-sensitive adhesive tape 1 for fixing a web material according to an embodiment of the present invention.

  As shown in FIG. 1, a double-sided pressure-sensitive adhesive tape 1 for fixing a web material according to this embodiment includes a long base material 10 and a first pressure-sensitive adhesive layer laminated on the surface (first surface) of the base material 10. 11 and the 1st separator 12, and the 2nd adhesion layer 13 and the 2nd separator 14 which were laminated | stacked on the back surface (2nd surface) of the base material 10. That is, the double-sided pressure-sensitive adhesive tape 1 in the present embodiment has a configuration in which separators 12 and 14 are provided on the double-sided adhesive layers 11 and 13. In addition, the double-sided pressure-sensitive adhesive tape 1 in the present embodiment is long in the longitudinal direction (X direction), and is usually dressed around the core 60.

  In the present embodiment, the releasing force of the first separator 12 with respect to the first adhesive layer 11 is set to be smaller than the releasing force of the second separator 14 with respect to the second adhesive layer 13. Note that the difference in the release force of the first and second separators 12 and 14 from the first and second adhesive layers 11 and 13 is, for example, silicone or the like on the surfaces of the first and second separators 12 and 14. It can be applied by changing the processing conditions for coating the release agent.

  As shown in FIG. 1, the first separator 12 has a first protruding portion 12 a that protrudes in the width direction (Y direction) with respect to the first adhesive layer 11. That is, the first adhesive layer 11 is not formed on the surface of the first protrusion 12a.

  The second separator 14 has a second protrusion 14 a that protrudes in the width direction (Y direction) with respect to the second adhesive layer 13. That is, the second adhesive layer 13 is not formed on the surface of the second protrusion 14a. Furthermore, the easy-to-cut part 20 which provided the easy-to-cut property of the width direction (Y direction) is formed in the 2nd protrusion part 14a along the longitudinal direction (X direction). The second separator 14 is formed continuously along the longitudinal direction (X direction), and the second separator 14 can be easily cut along the width direction (Y direction) at an arbitrary position. In addition, the easy cutting part 20 can be provided by forming a some fine groove | channel or through-hole in the thickness direction of the 2nd separator 14, for example.

  FIG. 2 is a diagram showing a procedure for removing the first separator 12 provided on the first adhesive layer 11 side. The double-sided pressure-sensitive adhesive tape shown in FIG. 2 is obtained by drawing out the double-sided pressure-sensitive adhesive tape wound around the core 60 by a necessary length and cutting it with a cutter or the like along the width direction (Y direction). .

  In the present embodiment, the release force of the first separator 12 with respect to the first adhesive layer 11 is set to be smaller than the release force of the second separator 14 with respect to the second adhesive layer 13. The first separator 12 can be easily peeled from the first adhesive layer 11 by picking the first protrusion 12a with a finger and pulling the first protrusion 12a in the longitudinal direction (X direction).

  On the other hand, FIGS. 3A and 3B are diagrams showing a procedure for removing the second separator 14 provided on the second adhesive layer 13 side. Note that the double-sided adhesive tape shown in FIGS. 3A and 3B is similar to the double-sided adhesive tape shown in FIG. , And cut with a cutter or the like along the width direction (Y direction).

  First, as shown in FIG. 3A, the easy-cut portion 20 formed in the second protrusion 14a is placed at an arbitrary position (preferably near the end in the longitudinal direction (X direction)). Cut along the direction (Y direction). Here, since the easy cutting part 20 is easy to cut in the width direction (Y direction), it is possible to make a cut in the width direction (Y direction) with a light force. Once the cut is made in the width direction (Y direction), the portion 14b of the second separator 14 is stripped from the second adhesive layer 13 by further pulling in the width direction (Y direction). Can be easily peeled off.

  Next, as shown in FIG. 3B, a part 14b of the second separator 14 peeled off from the second adhesive layer 13 is picked with a finger and pulled in the longitudinal direction (X direction). The second separator 14 can be easily peeled off from the second adhesive layer 13. At this time, if the surface of the second pressure-sensitive adhesive layer 13 exposed by peeling off a part 14b of the second separator 14 is lightly pressed, the second separator 14 is removed from the second pressure-sensitive adhesive layer 13. It can be removed smoothly.

  Thus, the double-sided pressure-sensitive adhesive tape 1 in the present embodiment can easily peel off the first and second separators 12 and 14 provided on the first and second pressure-sensitive adhesive layers 11 and 13 from either side. it can. As a result, when the double-sided adhesive tape is applied to the surface of the core, the adhesive layer to be applied to the core side can be a weak adhesive layer or a strong adhesive layer. Thus, the separator on the desired adhesive layer side can be easily peeled off.

  FIGS. 4A to 4D are diagrams showing a procedure of winding the web material 50 around the core 30 using the double-sided pressure-sensitive adhesive tape in the present embodiment, and then rewinding the web material 50 from the core 30. FIG. It is. The double-sided pressure-sensitive adhesive tape used here is set so that the adhesive force of the first adhesive layer 11 is smaller than the adhesive force of the second adhesive layer 13. In addition, a buffer material 40 is formed on the outer peripheral surface of the core 30 to reduce the level difference.

  FIG. 4A shows the first adhesive layer 11 side after the first separator 12 of the double-sided adhesive tape is peeled off from the first adhesive layer 11 according to the procedure shown in FIG. The state which affixed on the surface of the buffer material 40), and peeled the 2nd separator 14 from the 2nd adhesion layer 13 after that is shown.

  At this time, since the second separator 14 has the second protrusion 14a protruding in the width direction with respect to the second adhesive layer 13, the second protrusion 14a is pinched, By peeling the second separator 14 from the second adhesive layer 13, it is possible to prevent the surface of the cushioning material 40 from being damaged.

  Next, as shown in FIG. 4 (b), the web material 50 is attached to the core 30 as shown in FIG. 4 (c) after the tip of the web material 50 is attached to the second adhesive layer 13. Wind up. At this time, since the end portion of the web material 50 sinks into the buffer material 40, no step is generated between the outer peripheral surface of the buffer material 40 and the winding end portion of the web material 50. Thereby, generation | occurrence | production of the level | step difference trace resulting from the edge part of the web material 50 can be suppressed.

  Next, as shown in FIG. 4 (d), the web material 50 wound around the core 30 is rewound from the core 30 again. At this time, since the adhesive force of the first adhesive layer 11 is set smaller than the adhesive force of the second adhesive layer 13, the double-sided adhesive tape (11, 10, 13) is attached to the web material 50. Thus, the web material 50 can be smoothly peeled off from the core 30. As a result, when the web material 50 is peeled off from the core 30, it is possible to suppress the surface of the cushioning material 40 from being damaged.

  FIGS. 5A to 5D are diagrams showing another procedure of winding the web material 50 around the core 30 using the same double-sided adhesive tape as described above, and then rewinding the web material 50 from the core 30. FIG. It is. Here, no cushioning material is provided on the outer peripheral surface of the core 30 to reduce the step marks.

  FIG. 5A shows the second adhesive layer 13 side of the core 30 after peeling the second separator 14 of the double-sided adhesive tape from the second adhesive layer 13 according to the procedure shown in FIG. The state which affixed on the surface and peeled off the 1st separator 12 from the 2nd adhesion layer 13 after that is shown.

  At this time, since the first separator 12 has the first protrusion 12a protruding in the width direction with respect to the first adhesive layer 11, the first separator 12a is pinched, By peeling the first separator 12 from the first adhesive layer 11, it is possible to prevent the surface of the core 30 from being damaged.

  Next, as shown in FIG. 5 (b), after the tip of the web material 50 is attached to the first adhesive layer 11, the web material 50 is applied to the core 30 as shown in FIG. 5 (c). Wind up.

  Next, as shown in FIG. 5D, the web material 50 wound around the core 30 is rewound from the core 30 again. At this time, since the adhesive force of the first adhesive layer 11 is set to be smaller than the adhesive force of the second adhesive layer 13, when the web material 50 is peeled off from the core 30, the double-sided adhesive tape (11 10, 13) remain on the core 30 side. Thereby, a double-sided adhesive tape (11, 10, 13) can be used repeatedly.

  In the present embodiment, the material of the substrate 10 is not particularly limited, and for example, a PET film, a polypropylene film, a polyimide film, or the like can be used.

  Moreover, in this embodiment, although the material of the 1st adhesion layer 11 and the 2nd adhesion layer 13 is not specifically limited, For example, an acrylic adhesive, a urethane type adhesive, etc. can be used. Moreover, the adhesive force can be adjusted by controlling the type of monomer, the molecular weight of the polymer, the crosslinking density, and the like.

  Moreover, in this embodiment, the material of the 1st separator 12 and the 2nd separator 14 is not specifically limited, For example, a PET film, a polypropylene film, a polyethylene film etc. can be used.

  Moreover, in this embodiment, although the total thickness of the double-sided adhesive tape 1 is not specifically limited, In order to suppress the level | step difference by the double-sided adhesive tape 1, it is preferable to make the total thickness into 20 micrometers or less, and to make it into 10 micrometers or less. preferable.

  As mentioned above, although this invention was demonstrated by suitable embodiment, such description is not a limitation matter and of course various modifications are possible. For example, in the said embodiment, although the mold release force with respect to the 1st adhesion layer 11 of the 1st separator 12 was set smaller than the mold release force with respect to the 2nd adhesion layer 13 of the 2nd separator 14, The mold release force may be the same. In this case, by setting the adhesive force of the first adhesive layer 11 to be smaller than the adhesive force of the second adhesive layer 13, the first separator 12 can substantially be applied to the first adhesive layer 11. The release force can be made smaller than the release force of the second separator 14 with respect to the second adhesive layer 13.

  Moreover, in the said embodiment, although the double-sided adhesive tape was used for the web material fixation at the time of winding a web material around a winding core, it is not limited to this, The adhesive tape by which the separator was provided in each adhesive layer of both surfaces In addition, according to a use, it can apply also to what uses and peels the separator of the desired adhesion layer side selectively.

1 Double-sided adhesive tape
10 Base material
11 First adhesive layer
12 First separator
12a First protrusion
13 Second adhesive layer
14 Second separator
14a Second protrusion
20 Easy cutting part
30 roll core
40 cushioning material
50 Web material

Claims (6)

A double-sided pressure-sensitive adhesive tape for fixing a web material used when winding the web material around a core,
A long substrate;
A first adhesive layer and a first separator laminated on the first surface of the substrate;
A second adhesive layer and a second separator laminated on the second surface of the substrate;
The release force of the first separator with respect to the first adhesive layer is smaller than the release force of the second separator with respect to the second adhesive layer,
The first separator has a first protruding portion protruding in the width direction with respect to the first adhesive layer,
The second separator has a second protruding portion protruding in the width direction with respect to the second adhesive layer,
A double-sided pressure-sensitive adhesive tape for fixing a web material, wherein an easy-cutting portion is provided on the second projecting portion along the longitudinal direction to provide easy-cutting in the width direction.   The double-sided pressure-sensitive adhesive tape for fixing a web material according to claim 1, wherein the adhesive strength of the first adhesive layer is smaller than the adhesive strength of the second adhesive layer. A double-sided pressure-sensitive adhesive tape for fixing a web material used when winding the web material around a core,
A long substrate;
A first adhesive layer and a first separator laminated on the first surface of the substrate;
A second adhesive layer and a second separator laminated on the second surface of the substrate;
The adhesive force of the first adhesive layer is smaller than the adhesive force of the second adhesive layer,
The first separator has a first protruding portion protruding in the width direction with respect to the first adhesive layer,
The second separator has a second protruding portion protruding in the width direction with respect to the second adhesive layer,
A double-sided pressure-sensitive adhesive tape for fixing a web material, wherein an easy-cutting portion is provided on the second projecting portion along the longitudinal direction to provide easy-cutting in the width direction.   The web member fixing force according to claim 3, wherein a releasing force of the first separator with respect to the first adhesive layer and a releasing force of the second separator with respect to the second adhesive layer are the same. Double-sided adhesive tape.   The double-sided pressure-sensitive adhesive tape for fixing a web material according to any one of claims 1 to 4, wherein the easy-cut portion is composed of a plurality of fine grooves or through holes formed in the thickness direction. A double-sided adhesive tape in which a separator is provided on each adhesive layer on both sides,
A long substrate;
A first adhesive layer and a first separator laminated on the first surface of the substrate;
A second adhesive layer and a second separator laminated on the second surface of the substrate;
The release force of the first separator with respect to the first adhesive layer is smaller than the release force of the second separator with respect to the second adhesive layer,
The first separator has a first protruding portion protruding in the width direction with respect to the first adhesive layer,
The second separator has a second protruding portion protruding in the width direction with respect to the second adhesive layer,
The double-sided pressure-sensitive adhesive tape with a double-sided separator, wherein an easy-cutting portion that is easy to cut in the width direction is formed along the longitudinal direction on the second protrusion.

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