JP6865048B2 - Cushion tape - Google Patents

Description

The present invention relates to a cushion tape used to fix one end of a film to a core when the film is wound around a core.

Films such as antireflection films and hard coat films are often manufactured roll-to-roll. At this time, in order to wind the film in a roll shape, one end of the film is attached to a winding core called a core using an adhesive tape or the like.

FIG. 8 is a schematic view showing a state in which the conventional double-sided tape is used, and is a diagram showing a state in which the film starts to be wound. Note that FIG. 8 corresponds to a cross-sectional view along a plane orthogonal to the central axis of the core.

As shown in FIG. 8, one end of the long film 82 at the beginning of winding is attached to the surface of the cylindrical core 80 via a strip-shaped double-sided tape 81 having a constant width. The core 80 is made of, for example, paper or resin. The double-sided tape 81 is formed by, for example, applying an acrylic adhesive to the entire surfaces of both sides of a polyethylene terephthalate base material, and a release sheet for protecting the adhesive surface is attached to at least one of the adhesive surfaces. ..

When the film 82 is attached to the core 80, first, one adhesive surface of the double-sided tape 81 is attached to the surface of the core 80 so that the central axis of the core 80 and the longitudinal edge of the double-sided tape 81 are parallel to each other. wear. Next, the release sheet is peeled off to expose the other adhesive surface of the double-sided tape 81, and as shown in FIG. 8, the entire exposed adhesive surface of the double-sided tape 81 is covered with the film 82, and the film 82 is covered with the film 82. The film 82 is attached to the double-sided tape 81 so that the edge 83 at one end and one edge of the double-sided tape 81 substantially coincide with each other. After fixing one end of the film 82 to the core 80 in this way, the film 82 is wound around the core 80 by rotating the core 80.

As shown in FIG. 8, when the film 82 is fixed to the core 80 in a state where the edge 83 at one end of the film 82 and one edge of the double-sided tape 81 are substantially aligned, the edge of the fixed film 82 is fixed. In the vicinity of 83, a step corresponding to the total thickness of the film 82 and the double-sided tape 81 is formed. If the film 82 is wound in this state, a step is also generated in the wound film 82, and when the film 82 is unwound, a step mark remains. The step marks on the film are gradually eliminated as the number of windings increases, but in the winding method of FIG. 8, the step marks that occur in a portion having a certain length from the beginning of winding cannot be avoided, and the step marks in the portion where the step marks are generated cannot be avoided. The quality is lowered, and the yield of the film 82 is lowered.

Therefore, various double-sided tapes capable of reducing step marks on the film have been studied. For example, Patent Document 1 describes a configuration in which adhesive layers are provided on both sides of a cushion layer as a double-sided tape for fixing a web to a winding core. In Patent Document 1, the cushion layer provided on the double-sided tape absorbs the step at the start of winding the film, thereby reducing the occurrence of step marks due to the winding of the film.

Japanese Unexamined Patent Publication No. 2014-151985

When a film of a certain length is wound around the core, it is necessary to replace the core and fix one end of the film to the new core. Here, as a method of fixing one end of the film to the core, a method of manually attaching one end of the film to the double-sided tape attached to the core and a method of mechanically attaching one end of the film to the core by using an automatic take-up switching device are used. There is a method of sticking one end to double-sided tape. Here, the automatic winding switching device is a device that sequentially replaces the core, cuts the film, and attaches the film to the core when the winding is completed. The automatic take-up switching device is provided with a sticking roll used for sticking the film to the core, and by pressing the film overlapped with the double-sided tape on the outer peripheral surface of the core with the sticking roll. Attach the film.

In Patent Document 1 described above, a cushioning double-sided tape is attached over a predetermined length in the circumferential direction of the winding core, and the vicinity of one end of the web is fixed so as to cover a part of the adhesive layer on the surface of the double-sided tape. doing. In this case, when the vicinity of one end of the web is pressed by the sticking roll of the automatic winding switching device, the sticking roll comes into contact with the exposed adhesive layer at a portion adjacent to one end of the web, and the adhesive is applied to the sticking roll. Problems such as adhesion and contamination of the roll surface or double-sided tape being taken by the sticking roll and peeling off may occur.

Therefore, the present invention provides a cushion tape which can reduce the step generated at the start of winding of the film due to the cushioning property and is also suitable for sticking using the sticking roll of the automatic take-up switching device. The purpose is.

The cushion tape according to the present invention is used to fix the edge of the film to the core when the film is wound around the core, and is a long base material having cushioning properties and one of the base materials. A first pressure-sensitive adhesive layer provided on the entire surface of the direction and a center line of the other surface of the base material extending parallel to both edges in the longitudinal direction of the base material and dividing the base material into two in the lateral direction. On the other hand, it is provided with a second pressure-sensitive adhesive layer provided in an asymmetric band-shaped region, the thickness of the base material is 50 to 1000 μm, the thickness of the first pressure-sensitive adhesive layer is 5 to 30 μm, and the second pressure-sensitive adhesive is provided. The thickness of the agent layer is 5 to 30 μm, and a pair of non-adhesive regions having no adhesiveness are provided so as to sandwich the second adhesive layer from both sides in the lateral direction of the base material, and a pair of non-adhesive regions. width in the lateral direction of one of the substrates is 15 to 20 mm, the width in the lateral direction of the other substrate of the pair of non-adhesive region is 1~20mm der shall.

According to the present invention, it is possible to provide a cushion tape which can reduce a step generated at a winding start portion of a film due to its cushioning property and is also suitable for sticking using a sticking roll of an automatic winding switching device. With the goal.

Top view schematically showing the cushion tape according to the embodiment of the present invention. Sectional view along the II-II line shown in FIG. Schematic diagram showing the method of attaching the cushion tape shown in FIG. Schematic diagram showing a method of winding a film using the cushion tape shown in FIG. Sectional drawing which shows typically the cushion tape which concerns on a comparative example Schematic diagram showing the method of attaching the cushion tape shown in FIG. Schematic diagram showing a method of winding a film using the cushion tape shown in FIG. Schematic diagram showing a fixed state of a film using conventional double-sided tape

FIG. 1 is a plan view schematically showing a cushion tape according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line II-II shown in FIG.

The cushion tape 1 includes a base material 2 and a first pressure-sensitive adhesive layer 3 and a second pressure-sensitive adhesive layer 4 provided on one surface and the other surface of the base material 2, respectively. Hereinafter, in the present specification, of both surfaces of the base material 2, the surface provided with the first pressure-sensitive adhesive layer 3 is referred to as "lower surface (lower surface of FIG. 2)", and the second pressure-sensitive adhesive layer 4 is provided. The surface is referred to as "upper surface (upper surface in FIG. 2)".

The base material 2 is a long strip-shaped member made of a material having cushioning properties (shrinkability). As the base material 2, for example, a flexible material such as butyl rubber, soft rubber, or urethane can be used. Further, it is more preferable to use a foam obtained by foaming these materials as a base material in order to secure shrinkage. The hardness of the base material 2 having a thickness of 6 mm measured by a durometer type A (shore A) in accordance with JIS K 6253 is preferably 50 A or less. By setting the hardness of the base material 2 to 50 or less, it is possible to give the base material 2 an appropriate cushioning property and effectively reduce the step generated at the winding start portion of the film.

The first pressure-sensitive adhesive layer 3 and the second pressure-sensitive adhesive layer 4 are formed by applying a pressure-sensitive adhesive to the base material 2. The type of the pressure-sensitive adhesive is not particularly limited, but an acrylic pressure-sensitive adhesive, a urethane-based pressure-sensitive adhesive, or the like can be preferably used.

The first pressure-sensitive adhesive layer 3 is provided on the entire surface of one surface (lower surface in FIG. 2) of the base material 2. On the other hand, the second pressure-sensitive adhesive layer 4 is provided only on a part of the other surface (upper surface in FIG. 2) of the base material 2. More specifically, the second pressure-sensitive adhesive layer 4 extends parallel to both edges of the base material 2 in the longitudinal direction of the other surface of the base material 2, and divides the base material 2 into two in the lateral direction (center line). It is formed in a band-shaped region 5 that is asymmetric with respect to the alternate long and short dash line (FIG. 1). Further, in the present embodiment, the other surface of the base material 2 is not coated with an adhesive so as to sandwich the second pressure-sensitive adhesive layer 4 from both sides in the lateral direction (width direction) of the base material 2. Adhesive regions 6a and 6b are provided.

Next, a method of using the cushion tape 1 according to the present embodiment will be described.

FIG. 3 is a schematic view showing a method of attaching the cushion tape shown in FIG. 1, and FIG. 4 is a schematic view showing a method of winding a film using the cushion tape shown in FIG. In addition, in FIG. 3, a method of sticking the film 11 using the sticking roll 12 of the automatic take-up switching device will be described.

When fixing one end of the film 11 to the core 10, first, as shown in FIG. 3, on the surface of the core 10 so that the central axis of the core 10 and the longitudinal edge 13 of the cushion tape 1 are parallel to each other. The first pressure-sensitive adhesive layer 3 of the cushion tape is attached. Next, the release sheet (not shown) is peeled off to expose the second pressure-sensitive adhesive layer 4 of the cushion tape 1, and then the entire second pressure-sensitive adhesive layer 4 is covered with the film 11 and The film 11 is aligned so that the portion of the film 11 having a predetermined width from the edge 13 overlaps the non-adhesive region 6a, the film 11 is pressed by the sticking roll 12, and the film 11 is pressed against the second adhesive layer 4. Paste to. At this time, the sticking roll 12 presses the film 11 while rotating and moving from the non-adhesive region 6b side to the non-adhesive region 6a side, but the vicinity of the edge 13 of the film 11 is overlapped with the non-adhesive region 6a, and the first Since the entire adhesive layer 4 of 2 is covered with the film 11, even if the sticking roll 12 moves over the edge 13 and on the cushion tape 1, it does not come into contact with the adhesive. Therefore, it is possible to prevent the sticking roll 12 from being contaminated by the adhesive, or the cushion tape 1 from sticking to the sticking roll 12 and peeling off from the core 10.

Then, by rotating the core 10, the film 11 is wound around the core 10 as shown in FIG. Since a constant tension is applied to the film 11 when the film 11 is wound, the base material 2 of the cushion tape 1 is in a state of being sunk as the film 11 is wound. The subduction (shrinkage) of the base material 2 absorbs the step at the winding start portion of the film 11.

As described above, in the cushion tape 1 according to the present embodiment, a pair of non-adhesive regions 6a and 6b are provided so as to sandwich the second adhesive layer 4 in the lateral direction of the base material 2. Both edges of the base material 2 and both edges of the second pressure-sensitive adhesive layer 4 do not match, and the edge of the base material 2 and the edge 13 of the film 11 do not match, respectively. By staggering the arrangement, the level difference gradually increases from the surface of the core 10 to the upper surface of the film 11 fixed to the second adhesive layer 4 at the points V to X indicated by the arrows in FIG. At the same time, the step is gradually reduced at the points Y and Z indicated by the arrows. In the conventional example shown in FIG. 8, since the edge of the double-sided tape and the edge of the film are matched, the height from the surface of the core to the upper surface of the fixed film suddenly changes, and as a result, the height changes suddenly. The occurrence of step marks on the wound film was remarkable.

On the other hand, when the cushion tape 1 according to the present embodiment is used, the height change at the points V to Z shown in FIG. 4 is gentler than that of the conventional example of FIG. 8, and the cushion is used. The step is also reduced by the shrinkage of the base material 2 having the property. Therefore, it is possible to reduce the step marks generated on the film 11 as compared with the case of using the conventional double-sided tape.

Here, in order to help understanding the effect of the cushion tape according to the present invention, a comparative example will be described.

FIG. 5 is a cross-sectional view schematically showing the cushion tape according to the comparative example.

The cushion tape 85 shown in FIG. 5 includes a base material 86 having cushioning properties, an adhesive layer 87 provided on the entire surface of one surface of the base material 86, and an adhesive provided on the entire surface of the other surface of the base material 86. It is composed of a layer 88. The cushion tape 85 according to this comparative example has the same structure as the double-sided tape according to the conventional example shown in FIG. 8 and the adhesive layer, but differs in that the base material has cushioning properties.

FIG. 6 is a schematic view showing a method of winding a film using the cushion tape shown in FIG. 5, and FIG. 7 is a schematic view showing a method of attaching the cushion tape shown in FIG.

The method of using the cushion tape 85 shown in FIG. 6 is basically the same as that of the present embodiment, and the edge 83 at one end of the film 82 is displaced from the edge of the cushion tape 85, and the end edge 83 of the film 82 is designated. The film 82 is attached to the pressure-sensitive adhesive layer 88 so that the range portion covers almost half of the pressure-sensitive adhesive layer 88. In this way, the edge of the cushion tape 85 and the edge of the film 82 are stuck together in a stepwise manner from the surface of the core 80 to the surface of the film 82 fixed to the adhesive layer 88. This is to reduce the step in the vicinity of the edge 83 of the film 82 by changing the amount. Then, by rotating the core 80, the film 82 is wound around the core 80 as shown in FIG. 7.

Since the base material 86 used in the cushion tape 85 has cushioning properties as in the present embodiment, the base material 86 shrinks with the winding of the film 82, and the vicinity of both end edges of the cushion tape (FIG. 7). The step at the point indicated by the arrow) becomes smaller. As a result, it is possible to reduce the step marks generated on the film 82.

However, in the cushion tape 85 according to the comparative example, since the adhesive layer 88 is provided on the entire surface of the base material 86, the adhesive is provided in a state where the edge 83 of the film 82 is displaced from the edge of the cushion tape 85. When attached to the layer 88, as shown in FIG. 6, a part of the pressure-sensitive adhesive layer 88 is exposed when the film 82 is fixed. When the automatic winding switching device is used, if the film 82 is pressed while rotating the sticking roll 89 in this state, the sticking roll 89 comes into contact with the exposed adhesive layer after passing over the edge 83 of the film 82. As a result, the cushion tape 85 according to the comparative example has a problem that the sticking roll 89 is contaminated with the adhesive and the cushion tape 85 stuck to the sticking roll 89 is peeled off. Therefore, the cushion tape 85 according to the comparative example is not suitable for use in the automatic winding switching device.

On the other hand, in the cushion tape 1 according to the present embodiment, as described with reference to FIG. 2, the entire second adhesive layer 4 is covered with the film 11 when pressed by the sticking roll 12. It does not cause a problem as in the comparative example, and can be suitably used for an automatic take-up switching device.

Here, with reference to FIGS. 1 and 2 again, preferable dimensions of the cushion tape according to the present embodiment will be described.

The thickness A of the base material 2 is selected in the range of 50 to 1000 μm depending on the thickness of the film to be wound and the shrinkage of the material used as the base material 2. When the thickness of the base material 2 is thinner than 50 μm, the amount of shrinkage (sinking allowance) of the base material at the time of winding the film is insufficient, and the step generated at the winding start portion cannot be sufficiently reduced. On the other hand, when the thickness of the base material 2 exceeds 1000 μm, the step difference increases due to the thickness of the base material 2 itself, so that the step mark of the film cannot be reduced. The thickness of the base material 2 is preferably 1 to 5 times the thickness of the film so that a sufficient sinking allowance of the base material 2 can be secured when the film is wound.

The width W of the base material 2 in the lateral direction is preferably 30 to 60 mm. Since it is necessary to provide at least the second adhesive layer 4 and the non-adhesive region 6a on the surface of the base material 2, if the width W of the base material 2 is too small, the width b of the second pressure-sensitive adhesive layer 4 b. And the width a of the non-adhesive region 6a also needs to be reduced. The width b of the second pressure-sensitive adhesive layer 4 and the width a of the non-adhesive region 6a will be described later, but in order to secure these dimensions and improve the workability when fixing the film 11, the base material 2 is used. The width W is preferably 30 mm or more. Further, if the width W of the base material 2 is too large, it becomes difficult to attach the cushion tape 1 to the core 10. Therefore, in order to improve the workability of attachment, the width W of the base material 2 is 60 mm or less. Is preferable. However, the width W of the base material 2 does not necessarily have to be 30 to 60 mm, and can be appropriately selected depending on the diameter of the core 10, the application, and the like.

The thickness B of the first pressure-sensitive adhesive layer 3 and the thickness C of the second pressure-sensitive adhesive layer 4 are preferably 5 to 30 μm. By setting the thickness B of the first pressure-sensitive adhesive layer 3 and the thickness C of the second pressure-sensitive adhesive layer 4 within this range, it is possible to prevent the entire cushion tape 1 from becoming thick due to the thickness of the pressure-sensitive adhesive layer itself, and to prevent steps. Occurrence can be reduced.

The width b of the second pressure-sensitive adhesive layer 4 is preferably 8 to 20 mm. By setting the width b of the second pressure-sensitive adhesive layer 4 within this range, the adhesive strength required for fixing the film 11 can be secured. If the adhesive strength of the first pressure-sensitive adhesive layer 3 and the second pressure-sensitive adhesive layer 4 is 4N / 20 mm width or more, the adhesive strength required for fixing the film 11 can be secured.

The width a of the non-adhesive region 6a is preferably 15 to 20 mm, and the width c of the non-adhesive region 6b is preferably 1 to 20 mm. When the film 11 is fixed, a part of the film 11 is overlapped with the non-adhesive region 6a and is bonded to the second adhesive layer 4. Therefore, the width of the non-adhesive region is considered in consideration of ease of alignment. It is preferable that a is 15 to 20 mm. In this case, not only the alignment of the film 11 by the automatic winding switching device but also the alignment when the worker manually attaches the film 11 becomes easy, and the workability of the worker fixing the film 11 is improved. .. On the other hand, since the non-adhesive region 6b is provided for the purpose of reducing the step on the edge portion of the cushion tape 1, the width c of the non-adhesive region 6b is such that the edge portion of the base material 2 is exposed. The size may be any one, and it is preferably 1 to 20 mm.

Further, in the present embodiment, the second pressure-sensitive adhesive layer 4 is provided in a band-shaped region 5 that is asymmetric with respect to the center line (one-dot chain line in FIG. 1) that divides the base material 2 in the lateral direction. The width a of the non-adhesive region 6a is larger than the width c of the non-adhesive region 6b. In the vicinity of the non-adhesive region 6b, a level difference from the top of the second pressure-sensitive adhesive layer 4 to the surface of the core 10 occurs in the film 11, whereas in the vicinity of the non-adhesive region 6a, one from the surface of the core 10. A level difference to the surface of the roll film 11 occurs in the second roll film 11. That is, the step on the non-adhesive region 6a side becomes larger than that on the non-adhesive region 6b side by the amount that the thickness of the first roll film 11 is added to the thickness of the cushion tape 1. Therefore, the width a of the non-adhesive region 6a is made large, and the ratio of the level difference (step height) from the surface of the core 10 to the surface of the first roll film 11 with respect to the length of the film 11 in the circumferential direction of the core 10 is set. It is preferable to make the size smaller to suppress the change in the level of the film 11 in the radial direction of the core 10 from the viewpoint of reducing the step marks on the film 11. Therefore, in the present embodiment, the width a of the non-adhesive region 6a is made larger than the width c of the non-adhesive region 6b to asymmetrically form the second pressure-sensitive adhesive layer 4.

As described above, according to the cushion tape 1 according to the present embodiment, the base material 2 contracts and can absorb the step near the edge 13 of the film 11 attached to the core 10, so that the core can be absorbed. It is possible to reduce the step marks generated on the film 11 wound around the 10. In particular, in the present embodiment, since the non-adhesive regions 6a and 6b to which the adhesive is not applied are provided on both sides of the second adhesive layer 4 in the lateral direction of the base material 2, the cushion tape 1 is used as the core. In the state of being attached to the core 10, the height from the surface of the core 10 to the surface of the second pressure-sensitive adhesive layer 4 changes stepwise. Therefore, in addition to the reduction of the step due to the cushioning property of the base material 2 itself, the step is also reduced by alleviating the abrupt change of the step by the non-adhesive regions 6a and 6b, and the step mark of the film 11 is more effective. Can be suppressed. Further, in the present embodiment, the step reduction effect can be obtained not only on the non-adhesive region 6a side where the step is relatively large, but also on the non-adhesive region 6b side.

Further, in the cushion tape 1 according to the present embodiment, the edge 13 of the film 11 is used as the base material 2.
Since the film 11 can be attached to the second adhesive layer 4 in a state where the entire second adhesive layer 4 is covered with the film 11 so as to be overlapped with the non-adhesive region 6a of the above, the film 11 is attached. When crimping with the roll 12, the adhesive does not adhere to the sticking roll 12, and it is suitable for use in the automatic winding switching device.

Hereinafter, examples of concrete implementation of the present invention will be described.

Cushion tapes according to Examples 1 to 14 and Comparative Examples 1 to 4 were prepared by applying an acrylic pressure-sensitive adhesive as a pressure-sensitive adhesive to the entire surface of one surface of a base material made of acrylic and the band-shaped region on the other surface. The thicknesses of the base material, the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer, and the widths of the second pressure-sensitive adhesive layer and the non-adhesive region are as shown in Table 1.

Further, as Comparative Example 5, the conventional double-sided tape shown in FIG. 8 (the base material has no cushioning property) was used. The double-sided tape used in Comparative Example 5 has a thickness of 25 μm and a width of 40 mm.

Using the cushion tape (double-sided tape) of each embodiment and each comparative example, one end of an acrylic film having a thickness of 65 μm is fixed to a core made of glass fiber reinforced plastic (outer diameter 167 mm), and then the film is wound around the core. It was. The film was attached to the core using an automatic take-up switching device.

The suitability for the automatic take-up switching device and the effect of reducing the step marks on the film were evaluated as follows.

Regarding the suitability for the automatic take-up switching device, when the film is bonded to the core, the adhesive does not adhere to the bonding roll, and the position of one end edge of the film is displaced so as to overlap the non-adhesive region. The case where the film was bonded without being bonded was marked with "○", and the case where the adhesive adhered to the sticking roll or the edge of one end of the film was separated from the non-stick area and bonded was designated as "x".

Regarding the step marks on the film, the film wound around the core is rewound, and the presence or absence of the step marks at a portion 50 m from one end fixed to the core is visually confirmed. ◯ ”and the case where a step mark was observed were evaluated as“ × ”.

Table 1 shows the dimensions of the cushion tapes according to Examples 1 to 14 and Comparative Examples 1 to 5 together with the evaluation results. In addition, "-" in the evaluation of Table 1 indicates that it has not been evaluated.

First, when the double-sided tape according to Comparative Example 5 was used, when the film wound around the core was unwound, a step mark was observed at a portion 150 m from one end fixed to the core.

Further, when the cushion tapes according to Comparative Examples 1 and 3 were used, the non-adhesive region was not provided on the base material, so that the adhesive adhered to the sticking roll. When the cushion tapes according to Comparative Examples 2 and 4 were used, the edges of one end of the film were not bonded so as to overlap the non-adhesive region, and a part of the second adhesive region was exposed. Adhered. Therefore, none of the cushion tapes according to Comparative Examples 1 to 4 was suitable for use in the automatic winding switching device.

On the other hand, in the cushion tape according to Examples 1 to 14, a second adhesive layer asymmetrical and strip-shaped with respect to the center line in the lateral direction of the base material is provided on the cushioning base material. Therefore, as shown in Table 1, even if one end of the film is fixed by the automatic take-up switching device, no particular problem occurs, and the step marks are remarkably reduced as compared with the conventional double-sided tape according to Comparative Example 5. It was.

INDUSTRIAL APPLICABILITY The present invention can be used as a double-sided tape for fixing an optical film such as a hard coat film or an antireflection film, a functional film such as a barrier film, another resin film, a sheet, a web material, or the like to a core.

1 Cushion tape 2 Base material 3 First adhesive layer 4 Second adhesive layer 5 Band-shaped area 6a, 6b Non-adhesive area 10 Core 11 Film 13 Edge edge

Claims (6)

A cushion tape used to fix the edge of the film to the core when the film is wound around the core.
A long base material with cushioning properties and
A first pressure-sensitive adhesive layer provided on the entire surface of one surface of the base material,
A second surface of the other surface of the base material, which extends parallel to both end edges in the longitudinal direction of the base material and is provided in a band-shaped region asymmetric with respect to the center line that bisects the base material in the lateral direction. With an adhesive layer ,
The base material has a thickness of 50 to 1000 μm and has a thickness of 50 to 1000 μm.
The thickness of the first pressure-sensitive adhesive layer is 5 to 30 μm.
The thickness of the second pressure-sensitive adhesive layer is 5 to 30 μm.
A pair of non-adhesive regions having no adhesiveness are provided so as to sandwich the second pressure-sensitive adhesive layer from both sides in the lateral direction of the base material.
Width in the lateral direction of one of said base member of said pair of non-adhesive region is the 15 to 20 mm, the width in the lateral direction of the other of said base member of said pair of non-adhesive areas Ru 1~20mm der , Cushion tape. The cushion tape according to claim 1 , wherein the width of the base material in the lateral direction is 30 to 60 mm. The cushion tape according to claim 1 or 2 , wherein the base material is made of a butyl rubber-based or urethane-based material. The cushion tape according to any one of claims 1 to 3 , wherein the base material is a porous foam. The cushion tape according to any one of claims 1 to 4 , wherein the base material is made of soft rubber. The cushion tape according to any one of claims 1 to 5 , wherein the hardness of the base material measured according to JIS K 6253 is 50 A or less.

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