Skin sticking sheet

Abstract

To provide a skin sticking sheet which facilitates peeling of a carrier sheet from a base material.SOLUTION: A region not overlapped with a sticking tape 13 in a carrier sheet 11 is a first region 11R1, and a region overlapped with the sticking tape 13 is a second region 11R2. The carrier sheet 11 has a cut 11A extending exceeding a boundary 11B between the first region 11R1 and the second region 11R2 toward the sticking tape 13, from a part included in the first region 11R1 in an outer edge 11E of the carrier sheet 11, from the viewpoint opposite to a plane where the carrier sheet 11 is widened. Between the carrier sheet 11 and the base material, 180° peeling strength according to JIS Z 0237:2009 is 2 N / 25 mm or less. A thickness of the carrier sheet 11 is 10 μm or more and 400 μm or less. When the thickness of the carrier sheet 11 is T, a depth D1 of the cut 11A satisfies a following expression: 1 / 4T≤D1≤T.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a skin adhesive sheet. [Background technology]

[0002] Patch sheets for the skin are widely used for the purpose of protecting affected areas of the skin from the outside or hiding parts of the skin from the outside. The patch sheet includes a patch tape sandwiched between a carrier sheet and a release sheet. The patch tape includes a base material that contacts the carrier sheet and an adhesive layer that contacts the release sheet. When the patch is used, first, the release sheet is peeled off from the adhesive layer. Then, the laminate of the patch tape and the carrier sheet is attached to the skin by the adhesive layer. Next, the carrier sheet is peeled off from the base material (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6706398 Summary of the Invention [Problem to be solved by the invention]

[0004] However, substrates that are applied to the skin are required to have high tensile elongation at break like polyurethane in order to obtain skin conformability, but such substrates also have high adhesion to polyolefin- or polyester-based carrier sheets, making it difficult to peel the carrier sheet off the substrate applied to the skin. [Means for solving the problem]

[0005] The skin patch sheet for solving the above problem includes a carrier sheet, a release sheet, and an adhesive tape located between the carrier sheet and the release sheet. The adhesive tape includes a base material that contacts the carrier sheet and has a tensile breaking elongation higher than the carrier sheet and the release sheet, and an adhesive layer that contacts the release sheet and is attached to the skin after the release sheet is peeled off from the adhesive layer. The area of ​​the carrier sheet is larger than the area of ​​the adhesive tape. The carrier sheet includes a first region that is an area that does not overlap with the adhesive tape, and a second region that is an area that overlaps with the adhesive tape. The carrier sheet has a slit that extends from a part of the outer edge of the carrier sheet that is included in the first region toward the adhesive tape, beyond the boundary between the first region and the second region, when viewed from a viewpoint opposite to the plane on which the carrier sheet spreads. The 180° peel strength between the carrier sheet and the base material according to JIS Z 0237:2009 is 2N / 25mm or less. The thickness of the carrier sheet is 10 μm or more and 400 μm or less. When the thickness of the carrier sheet is T, the depth D1 of the cut satisfies the following formula: 1 / 4T≦D1≦T

[0006] According to the above-mentioned skin patch sheet, in a carrier sheet having a thickness of 10 μm or more and 400 μm or less, the 180° peel strength is 2 N / 25 mm or less, and the depth of the cut extending from the outside of the patch tape to the inside of the patch tape is in the range of ¼T to T. Therefore, it is easy to peel the carrier sheet from the substrate starting from the cut.

[0007] The skin patch sheet for solving the above problem includes a carrier sheet, a release sheet, and an adhesive tape located between the carrier sheet and the release sheet. The adhesive tape includes a base material that contacts the carrier sheet and has a tensile breaking elongation higher than the carrier sheet and the release sheet, and an adhesive layer that contacts the release sheet and is attached to the skin after the release sheet is peeled off from the adhesive layer. The area of ​​the carrier sheet is larger than the area of ​​the adhesive tape. The area of ​​the carrier sheet is larger than the area of ​​the adhesive tape. The carrier sheet includes a first region that is an area that does not overlap with the adhesive tape, and a second region that is an area that overlaps with the adhesive tape. The carrier sheet has a slit that extends from a portion of the outer edge of the carrier sheet that is included in the first region toward the adhesive tape, beyond the boundary between the first region and the second region, when viewed from a viewpoint opposite to the plane on which the carrier sheet spreads. The 180° peel strength between the carrier sheet and the substrate is 2 N / 25 mm or less in accordance with JIS Z 0237:2009. The trouser tear strength of the carrier sheet is 10 N / mm or less in accordance with JIS K 7128-1:1998. In the thickness direction of the carrier sheet, a remaining thickness TR1 of the carrier sheet connected to the slit satisfies the following formula when the thickness of the carrier sheet is T. 0≦TR1≦3 / 4T

[0008] According to the above-mentioned skin patch sheet, in a carrier sheet having a trouser tear strength of 10 N / mm or less, the 180° peel strength is 2 N / mm or less, and the remaining thickness of the carrier sheet at a slit extending from the outside of the application tape to the inside of the application tape is within the range of 0 to 3 / 4 T. Therefore, the carrier sheet can be easily peeled off from the substrate starting from the slit.

[0009] In the above-mentioned skin patch sheet, the depth of the cut at the portion of the carrier sheet that overlaps the patch tape may be shallower than the depth of the portion of the carrier sheet that does not overlap the patch tape.

[0010] According to the above-mentioned skin patch sheet, the portion of the cut located on the patch tape does not penetrate the carrier sheet, which prevents the substrate from being cut together with the carrier sheet during the production of the skin patch sheet, and also prevents foreign matter from reaching the substrate through the cut before the skin patch sheet is used.

[0011] In the above-mentioned skin patch sheet, the depth of the cut at the portion of the carrier sheet that overlaps the patch tape may be shallower than the depth of the portion of the carrier sheet that does not overlap the patch tape, and the carrier sheet may have a trouser tear strength of 10 N / mm or less in accordance with JIS K 7128-1:1998.

[0012] According to the above-mentioned skin patch sheet, the trouser tear strength is 10 N / mm or less, so that the tearability of the carrier sheet is improved while the substrate is prevented from being cut together with the carrier sheet during the production of the skin patch sheet, and it is possible to prevent foreign matter from reaching the substrate through the cut before the skin patch sheet is used.

[0013] In the above-mentioned skin adhesive sheet, the cut is a first cut, and the carrier sheet further comprises a second cut extending from a portion of the outer edge of the carrier sheet that is included in the first region toward the adhesive tape, beyond the boundary between the first region and the second region, when viewed from a viewpoint opposite to the plane along which the carrier sheet spreads, and a depth D2 of the second cut satisfies the following formula when the thickness of the carrier sheet is T, and base ends of the cuts that are located on the outer edge of the carrier sheet may face each other across the adhesive tape. 1 / 4T≦D2≦T

[0014] According to the above-mentioned skin patch sheet, the carrier sheet can be peeled off from the substrate along the cuts from both sides of the patch tape, so that the carrier sheet can be easily peeled off.

[0015] In the above-mentioned skin adhesive sheet, the cut is a first cut, and the carrier sheet further comprises a second cut extending from a portion of the outer edge of the carrier sheet that is included in the first region toward the application tape, beyond the boundary between the first region and the second region, when viewed from a viewpoint opposite to the plane along which the carrier sheet spreads, and a depth D2 of the second cut satisfies the following formula when the thickness of the carrier sheet is T, and when viewed from a viewpoint opposite to the plane along which the carrier sheet spreads, the first cut and the second cut are arranged at intervals along a first direction, and each cut extends along a second direction intersecting the first direction, and the carrier sheet may comprise a gripping portion that is sandwiched between the first cut and the second cut and extends along the second direction. 1 / 4T≦D2≦T

[0016] According to the above-mentioned skin adhesive sheet, since a user of the skin adhesive sheet can grip the gripping portion of the carrier sheet, it is easy to apply an external force to the carrier sheet in order to peel the carrier sheet from the substrate. Effect of the Invention

[0017] According to the skin patch sheet of the present disclosure, the carrier sheet can be easily peeled off from the substrate. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a cross-sectional view showing the structure of a skin patch sheet. [Diagram 2] FIG. 2 is a plan view showing the structure of the skin patch sheet shown in FIG. [Diagram 3] FIG. 3 is a cross-sectional view showing a part of the carrier sheet and a part of the substrate of the skin patch sheet shown in FIG. [Figure 4] FIG. 4 is a plan view showing the structure of a first modified example of the skin adhesive sheet. [Diagram 5] FIG. 5 is a plan view showing the structure of a second modified example of the skin adhesive sheet. [Figure 6] FIG. 6 is a plan view showing the structure of a third modified example of the skin adhesive sheet. [Figure 7] FIG. 7 is a plan view showing the structure of a fourth modified example of the skin adhesive sheet. [Figure 8] FIG. 8 is a plan view showing the structure of a fifth modified example of the skin adhesive sheet. [Figure 9] FIG. 9 is a plan view showing the structure of a sixth modified example of the skin adhesive sheet. [Figure 10] FIG. 10 is a plan view showing the structure of a seventh modified example of the skin adhesive sheet. [Figure 11] FIG. 11 is a plan view showing the structure of an eighth modified example of the skin adhesive sheet. [Figure 12] FIG. 12 is a plan view showing the structure of a ninth modified example of the skin adhesive sheet. [Figure 13] FIG. 13 is a plan view showing the structure of a tenth modified example of the skin patch sheet. [Figure 14] FIG. 14 is a plan view showing the structure of an eleventh modified example of the skin patch sheet. [Figure 15] FIG. 15 is a table showing the evaluation results of the skin patch sheets of the Examples and Comparative Examples. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] An embodiment of the skin adhesive sheet will be described with reference to Figs. [Skin patch sheet] A first configuration and a second configuration of the skin adhesive sheet of the present disclosure will be described with reference to Figures 1 to 3. In the following, matters common to the first and second configurations will be described first, and then the first and second configurations will be described in order.

[0020] As shown in Fig. 1, the skin adhesive sheet 10 comprises a carrier sheet 11, a release sheet 12, and an adhesive tape 13 located between the carrier sheet 11 and the release sheet 12. The adhesive tape 13 comprises a base material 13A and an adhesive layer 13B. The base material 13A contacts the carrier sheet 11, and has a higher tensile breaking elongation than the carrier sheet 11 and the release sheet 12. The adhesive layer 13B contacts the release sheet 12. The adhesive layer 13B is attached to the skin after the release sheet 12 is peeled off from the adhesive layer 13B.

[0021] The 180° peel strength between the carrier sheet 11 and the base material 13A in accordance with JIS Z 0237:2009 is 2N / 25mm or less. The 180° peel strength is a value measured by a method in accordance with JIS Z 0237:2009 "Test methods for adhesive tapes and adhesive sheets."

[0022] As shown in FIG. 2, the area of ​​the carrier sheet 11 is larger than the area of ​​the application tape 13. The area of ​​the carrier sheet 11 that does not overlap with the application tape 13 is the first area 11R1, and the area that overlaps with the application tape 13 is the second area 11R2. The carrier sheet 11 has a slit 11A. In the example shown in FIG. 2, the carrier sheet 11 has only one slit 11A. When viewed from a viewpoint opposite to the plane on which the carrier sheet 11 spreads, the slit 11A extends from a portion of the outer edge 11E of the carrier sheet 11 that is included in the first area 11R1 toward the application tape 13 beyond the boundary 11B between the first area 11R1 and the second area 11R2.

[0023] The slit 11A has a base end 11AP and a tip end 11AD. The base end 11AP of the slit 11A is located in a portion of the outer edge 11E of the carrier sheet 11 that is included in the first region 11R1. In contrast, the tip end 11AD of the slit 11A is located in a portion of the outer edge 11E of the carrier sheet 11 that is included in the second region 11R2. The tip end 11AD of the slit 11A may be located in a region of the second region 11R2 of the carrier sheet 11 that is more inward than the outer edge 11E.

[0024] 2, the carrier sheet 11 has a rectangular shape, and the slit 11A has a length that covers the entire short side direction of the carrier sheet 11. The slit 11A may have a length that covers the entire first region 11R1 and extends halfway through the second region 11R2 in the short side direction of the carrier sheet 11.

[0025] As shown in Fig. 2, the slit 11A may have a straight line shape. Alternatively, the slit 11A may have a curved line shape or a folded line shape. When the slit 11A has a folded line shape, the slit 11A may have only one bent portion or may have two or more bent portions.

[0026] 3 is a cross-sectional view including a portion of carrier sheet 11 and a portion of substrate 13A. FIG. 3 is also a cross-sectional view taken along a plane including cut 11A of carrier sheet 11. In the example shown in Fig. 3, the slit 11A has a depth D1 that reaches only a portion of the carrier sheet 11 in the thickness direction. The slit 11A may have a depth D1 that extends over the entire carrier sheet 11 in the thickness direction. When the slit 11A has a depth D1 that reaches only a portion of the carrier sheet 11 in the thickness direction, the carrier sheet 11 has a remainder 11RE that is continuous with the slit 11A in the thickness direction of the carrier sheet 11. The remainder 11RE of the carrier sheet 11 has a remaining thickness TR1 obtained by subtracting the depth D1 of the slit 11A from the thickness T of the carrier sheet 11.

[0027] The gap 11A is composed of a first portion 11AA and a second portion 11AB. The first portion 11AA is a portion of the gap 11A located in a first region 11R1 of the carrier sheet 11. The second portion 11AB is a portion of the gap 11A located in a second region 11R2 of the carrier sheet 11. In the example shown in FIG. 3, the depth of the first portion 11AA is equal to the depth of the second portion 11AB. The depth of the first portion 11AA may be different from the depth of the second portion 11AB.

[0028] [First configuration] The first configuration of the skin adhesive sheet 10 satisfies the following conditions. (Condition 1-1) The thickness of the carrier sheet 11 is 10 μm or more and 400 μm or less. (Condition 1-2) When the thickness of the carrier sheet 11 is T, the depth D1 of the cut 11A satisfies the following formula. 1 / 4T≦D1≦T

[0029] In the carrier sheet 11 having a thickness of 10 μm or more and 400 μm or less, the 180° peel strength is 2 N / 25 mm or less, and the depth D1 of the slit 11A extending from the outside of the application tape 13 to the inside of the application tape 13 is in the range of 1 / 4T or more and T or less. Therefore, it is easy to peel the carrier sheet 11 from the substrate 13A starting from the slit 11A. In the present disclosure, the adhesion strength between the carrier sheet 11 and the substrate 13A is evaluated by the 180° peel strength.

[0030] From the viewpoint of facilitating peeling of the carrier sheet 11 starting from the slit 11A, it is preferable that the depth D1 of the slit 11A is deep. Therefore, the lower limit of the depth D1 may be 1 / 2T or 3 / 4T. From the viewpoint of preventing the substrate 13A from being cut during the production of the skin patch sheet 10 and preventing foreign matter from reaching the substrate 13A through the slit 11A, it is preferable that the depth D1 of the slit 11A is shallow. Therefore, the depth D1 may be less than T. Moreover, the upper limit of the depth D1 may be 3 / 4T or 1 / 2T.

[0031] The skin adhesive sheet 10 may satisfy the following conditions 1-3 and 1-4. (Condition 1-3) The depth of the cut 11A at the portion of the carrier sheet 11 that overlaps the application tape 13 is shallower than the depth of the portion of the carrier sheet 11 that does not overlap the application tape 13. In other words, the depth of the first portion 11AA of the cut 11A is deeper than the depth of the second portion 11AB of the cut 11A.

[0032] (Condition 1-4) In the carrier sheet 11, the trouser tear strength in accordance with JIS K 7128-1:1998 is 10 N / mm or less.

[0033] Since the trouser tear strength is 10 N / mm or less, the tearability of the carrier sheet 11 is improved, while the substrate 13A is prevented from being cut together with the carrier sheet 11 during the production of the skin patch sheet 10. Furthermore, it is possible to prevent foreign matter from reaching the substrate 13A through the cut 11A before the use of the skin patch sheet 10. The lower limit of the trouser tear strength may be greater than 0, for example, 0.01 N / mm.

[0034] When the skin adhesive sheet 10 satisfies the conditions 1-4, the depth of the first portion 11AA may be equal to the thickness T, while the depth of the second portion 11AB may be smaller than the thickness T. Alternatively, when the skin adhesive sheet 10 satisfies the conditions 1-4, both the depth of the first portion 11AA and the depth of the second portion 11AB may be smaller than the thickness T. From the viewpoint of facilitating tearing of the carrier sheet 11 starting from the cut 11A, it is preferable that the depth of the first portion 11AA is equal to the thickness T.

[0035] [Second configuration] The second configuration of the skin adhesive sheet 10 satisfies the following conditions. (Condition 2-1) The carrier sheet 11 has a trouser tear strength according to JIS K 7128-1:1998 of 10 N / mm or less.

[0036] (Condition 2-2) In the thickness direction of the carrier sheet 11, a remaining thickness TR1 which is the thickness of the remaining portion 11RE of the carrier sheet 11 continuing to the cut 11A satisfies the following formula when the thickness of the carrier sheet 11 is T. 0≦TR1≦3 / 4T

[0037] In carrier sheet 11 having a trouser tear strength of 10 N / mm or less, 180° peel strength is 2 N / mm or less, and the remaining thickness of carrier sheet 11 at a slit extending from the outside of application tape 13 to the inside of application tape 13 is within the range of 0 to 3 / 4T. Therefore, carrier sheet 11 can be easily peeled off from substrate 13A starting from slit 11A.

[0038] From the viewpoint of facilitating peeling of the carrier sheet 11 starting from the slit 11A, it is preferable that the remaining thickness TR1 of the slit 11A is thin. Therefore, the upper limit value of the remaining thickness TR1 may be 1 / 2T or 1 / 4T. From the viewpoint of preventing the substrate 13A from being cut during the production of the skin adhesive sheet 10 and preventing foreign matter from reaching the substrate 13A through the slit 11A, it is preferable that the remaining thickness TR1 of the slit 11A is thick. Therefore, the remaining thickness TR1 may be larger than 0. Moreover, the upper limit value of the remaining thickness TR1 may be 1 / 4T or 1 / 2T.

[0039] The skin adhesive sheet 10 may satisfy the following conditions 2-3. (Condition 2-3) The remaining thickness of the cut 11A at the portion of the carrier sheet 11 that overlaps the application tape 13 is thinner than the remaining thickness of the portion of the carrier sheet 11 that does not overlap the application tape 13. In other words, the remaining thickness of the first portion 11AA of the cut 11A is thinner than the remaining thickness of the second portion 11AB of the cut 11A.

[0040] The portion of the slit 11A located on the application tape 13 does not penetrate the carrier sheet 11. This prevents the base material 13A from being cut together with the carrier sheet during the production of the skin patch sheet 10, and also prevents foreign matter from reaching the base material through the slit 11A before the skin patch sheet 10 is used.

[0041] When the skin adhesive sheet 10 satisfies the condition 2-3, the residual thickness at the first portion 11AA may be 0, while the residual thickness at the second portion 11AB may be greater than 0. Alternatively, when the skin adhesive sheet 10 satisfies the condition 2-3, both the residual thickness at the first portion 11AA and the residual thickness at the second portion 11AB may be smaller than the thickness T. From the viewpoint of facilitating tearing of the carrier sheet 11 starting from the cut 11A, it is preferable that the residual thickness at the first portion 11AA is 0.

[0042] In this way, in both the first and second configurations of the skin adhesive sheet 10, the carrier sheet 11 can be easily peeled off from the substrate 13A starting from the slit 11A. When the substrate 13A or the adhesive layer 13B contains an active ingredient for the skin, or when the skin adhesive sheet 10 is stored in an environment that satisfies at least one of high temperature and high humidity, the adhesive strength between the substrate 13A and the carrier sheet 11 may be further increased. According to the skin adhesive sheet 10 of the present disclosure, even when the adhesive strength is further increased, it is possible to easily peel off the carrier sheet 11 from the substrate 13A.

[0043] It is also possible to combine the first and second configurations. That is, the skin adhesive sheet satisfies condition 1-1 and condition 2-1, and the slit 11A satisfies both condition 1-2 and condition 2-2.

[0044] [Example of change] As shown in Figs. 4 to 14, the first and second configurations of the skin adhesive sheet 10 described above can be modified as follows.

[0045] The skin adhesive sheet 10 shown in Figures 4 to 9 has a different outer shape than the skin adhesive sheet 10 described with reference to Figures 1 to 3. Also, the skin adhesive sheet 10 shown in Figure 9 has a different number of first regions 11R1 than the skin adhesive sheet 10 described with reference to Figures 1 to 3.

[0046] In the first modified example shown in Fig. 4, the outer shape of the carrier sheet 11 is an octagon. The outer shape of the carrier sheet 11 is also a rectangle with each corner cut off. The cut 11A has a length that covers the entire length of the carrier sheet 11. The outer shape of the application tape 13 and the outer shape of the release sheet 12 are approximately rectangular. In the application tape 13 and the release sheet 12, two corners of the rectangle that are adjacent to each other in the short direction are cut off.

[0047] In the second modified example shown in Fig. 5, the outer shape of the carrier sheet 11 is hexagonal. The outer shape of the carrier sheet 11 is also a rectangular shape with two adjacent corners in the short side direction cut off. The cut 11A has a length covering the entire length of the carrier sheet 11 in the longitudinal direction. The outer shape of the application tape 13 and the outer shape of the release sheet 12 are hexagonal. The outer shape of the application tape 13 and the outer shape of the release sheet 12 are also a rectangular shape with two adjacent corners in the short side direction cut off.

[0048] In the third modified example shown in Fig. 6, the outer shape of the carrier sheet 11 is circular. The slit 11A passes through the center of the carrier sheet 11 and has a length equal to the diameter of the carrier sheet 11. The outer shape of the application tape 13 and the outer shape of the release sheet 12 are defined by a major arc concentric with the carrier sheet 11 and a chord connecting both ends of the major arc.

[0049] In the fourth modified example shown in FIG. 7, the outer shape of the carrier sheet 11 is composed of a first elliptical arc and a second elliptical arc. The major axis of the second elliptical arc is longer than the major axis of the first elliptical arc. The first elliptical arc and the second elliptical arc are major arcs. The cut 11A has a length that covers the entire first region 11R1 and the second region 11R2. The outer shape of the application tape 13 and the outer shape of the release sheet 12 are elliptical. The outer shape of the application tape 13 and the outer shape of the release sheet 12 are concentric with the second elliptical arc. In the outer shape of the application tape 13 and the outer shape of the release sheet 12, the length of the minor axis and the length of the major axis are the same as those of the second elliptical arc.

[0050] In the fifth modified example shown in FIG. 8, the outer shape of the carrier sheet 11 is substantially circular. The outer shape of the carrier sheet 11 is also substantially teardrop-shaped extending along the longitudinal direction. A first region 11R1 and a second region 11R2 are arranged in the longitudinal direction. The first region 11R1 has a groove portion 11R1G recessed toward the second region 11R2 at a position facing the boundary between the first region 11R1 and the second region 11R2 in the longitudinal direction. The slit 11A has an end in the valley of the groove portion 11R1G and has a length extending over the entire longitudinal direction. The first region 11R1 is divided into a first gripping portion R1N1 and a second gripping portion R1N2 by the slit 11A. The outline of the application tape 13 and the outline of the release sheet 12 are defined by an approximately arc-shaped line segment included in the outline of the carrier sheet 11 and a straight line segment connecting both ends of the arc-shaped line segment and extending along the short direction.

[0051] According to the fifth modified example of the skin adhesive sheet 10, a user of the skin adhesive sheet 10 can tear the carrier sheet 11 along the cut 11A by pinching the first gripping portion R1N1 and the second gripping portion R1N2 that sandwich the groove portion 11R1G, and then pulling the first gripping portion R1N1 and the second gripping portion R1N2 in directions away from each other. This makes it easier for the carrier sheet 11 to tear.

[0052] In the sixth modified example shown in FIG. 9, the outer shape of the carrier sheet 11 is octagonal, as in the first modified example of the skin adhesive sheet 10. The outer shape of the carrier sheet 11 is also a rectangular shape with each corner cut off. The cut 11A has a length that covers the entire length of the carrier sheet 11 in the longitudinal direction. Meanwhile, the outer shape of the adhesive tape 13 and the outer shape of the release sheet 12 are rectangular. As a result, both ends of the carrier sheet 11 do not overlap the adhesive tape 13 in the longitudinal direction of the skin adhesive sheet 10. That is, the carrier sheet 11 has two first regions 11R1 and one second region 11R2. In the longitudinal direction of the carrier sheet 11, the second region 11R2 is sandwiched between the two first regions 11R1. Since the second region 11R2 is sandwiched between the two first regions 11R1, it is easy to tear the carrier sheet 11 along the cut 11A from both sides in the longitudinal direction.

[0053] The skin adhesive sheet 10 shown in Figures 10 to 14 has a different number of slits 11A in the carrier sheet 11 compared to the skin adhesive sheet 10 described with reference to Figures 1 to 3. The carrier sheet 11 of the skin adhesive sheet 10 shown in Figures 10 to 14 has two slits 11A. The number of slits 11A in the carrier sheet 11 may be one or more, and may be two as in the skin adhesive sheet 10 shown in Figures 10 to 14, or may be three or more.

[0054] 10 to 13, the carrier sheet 11 has a first cut 11A1 and a second cut 11A2. The first cut 11A1 has a configuration equivalent to the cut 11A of the first or second configuration described above. The second cut 11A2, like the first cut 11A1, extends from a portion of the outer edge 11E of the carrier sheet 11 that is included in the first region 11R1 toward the application tape 13 beyond the boundary 11B between the first region 11R1 and the second region 11R2, as viewed from a viewpoint facing the plane on which the carrier sheet 11 spreads. The depth D2 of the second cut 11A2, like the depth D1 of the first cut 11A1, satisfies the following formula when the thickness of the carrier sheet 11 is T. 1 / 4T≦D2≦T

[0055] In addition, at the second cut 11A2, the remaining thickness TR2, which is the thickness of the remaining part of the carrier sheet 11 connected to the second cut 11A2 in the thickness direction, may satisfy the following formula when the thickness of the carrier sheet 11 is T. 0≦TR2≦3 / 4T

[0056] When viewed from a viewpoint facing the plane on which the carrier sheet 11 extends, the first cut 11A1 and the second cut 11A2 are spaced apart from each other along the first direction, and each of the cuts 11A1 and 11A2 extends along a second direction intersecting the first direction. The carrier sheet 11 includes a gripping portion 11N that is sandwiched between the first cut 11A1 and the second cut 11A2 and extends along the second direction.

[0057] Since the user of the skin adhesive sheet 10 can grip the gripping portion 11N of the carrier sheet 11, it is easy to apply an external force to the carrier sheet 11 to peel the carrier sheet 11 from the base material 13A. The structure of each modification will be described in more detail below with reference to the drawings. In each modification shown in Fig. 10 to Fig. 13, the outer shape of the carrier sheet 11 is rectangular.

[0058] In the fifth modified example shown in FIG. 10, both the first cut 11A1 and the second cut 11A2 have a length that spans the entire short side direction of the skin adhesive sheet 10. The first cut 11A1 and the second cut 11A2 are arranged side by side with a gap in the longitudinal direction of the skin adhesive sheet 10. The longitudinal direction is an example of a first direction. The first cut 11A1 is parallel to the second cut 11A2. The first cut 11A1 and the second cut 11A2 define a gripping portion 11N having a rectangular shape extending along the short side direction. The short side direction is an example of a second direction.

[0059] In the sixth modified example shown in FIG. 11, each of the slits 11A1 and 11A2 extends in a direction intersecting the short-side direction. The first slit 11A1 extends in the short-side direction and is symmetrical with the second slit 11A2 with respect to an axis of symmetry passing through the center of the carrier sheet 11 in the longitudinal direction. The distance between the first slit 11A1 and the second slit 11A2 in the longitudinal direction gradually increases from the base end 11A1P of the first slit 11A1 to the tip 11A1D. Therefore, the distance between the base end 11A1P of the first slit 11A1 and the base end 11A2P of the second slit 11A2 is the shortest, and the distance between the tip 11A1D of the first slit 11A1 and the tip 11A2D of the second slit 11A2 is the longest. The gripping portion 11N defined by the first slit 11A1 and the second slit 11A2 has a trapezoidal shape.

[0060] In the seventh modification shown in FIG. 12, the first cut 11A1 has a straight line shape along the short side direction from the tip 11A1D to the base end 11A1P, and has a curved shape so as to approach the second cut 11A2 on the way from the tip 11A1D to the base end 11A1P. The second cut 11A2 has a straight line shape along the short side direction from the tip 11A2D to the base end 11A2P, and has a curved shape so as to approach the first cut 11A1 on the way from the tip 11A2D to the base end 11A2P. The base end 11A2P of the second cut 11A2 is connected to the base end 11A1P of the first cut 11A1 at the outer edge 11E of the carrier sheet 11. The tips 11A1D and 11A2D of the cuts 11A1 and 11A2 are located in the second region 11R2.

[0061] The first cut 11A1 extends along the short direction and is symmetrical with the second cut 11A2 with respect to an axis of symmetry passing through the center of the carrier sheet 11 in the long direction. The shape formed by the first cut 11A1 and the second cut 11A2 is U-shaped. The distance between the first cut 11A1 and the second cut 11A2 gradually increases and then becomes constant in the direction from the base end 11A1P of the first cut 11A1 toward the tip end 11A1D.

[0062] In the eighth modified example shown in Fig. 13, each of the slits 11A1, 11A2 extends along the short side direction. The tips 11A1D, 11A2D of each of the slits 11A1, 11A2 are located within the second region 11R2. The gripping portion 11N is composed of a portion sandwiched between the first slit 11A1 and the second slit 11A2 and a portion located outside each of the slits 11A1, 11A2. In other words, the gripping portion 11N includes a portion that protrudes beyond the base ends 11A1P, 11A2P toward the opposite side to the tips 11A1D, 11A2D.

[0063] In each of the modified examples, from the viewpoint of making gripping portion 11N easy to grip, it is preferable that the depths D1, D2 of each of cuts 11A1, 11A2 at the portions located in first region 11R1 are equal to the thickness T of carrier sheet 11. In other words, it is preferable that the remaining thicknesses TR1, TR2 of each of cuts 11A1, 11A2 are 0.

[0064] In the ninth modification of the skin adhesive sheet 10 shown in Fig. 14, the carrier sheet 11 has a first cut 11A1 and a second cut 11A2. The first cut 11A1 has a configuration equivalent to the cut 11A in the first or second configuration described above. The second cut 11A2, like the first cut 11A1, extends from a portion of the outer edge 11E of the carrier sheet 11 that is included in the first region 11R1 toward the adhesive tape 13 beyond the boundary 11B between the first region 11R1 and the second region 11R2, when viewed from a viewpoint facing the plane on which the carrier sheet 11 spreads.

[0065] Like the depth D1 of the first cut 11A1, the depth D2 of the second cut 11A2 satisfies the following formula when the thickness of the carrier sheet 11 is T. Of the cuts 11A1 and 11A2, base ends 11A1P and 11A2P located on the outer edge 11E of the carrier sheet 11 face each other with the adhesive tape in between. 1 / 4T≦D2≦T

[0066] In addition, at the second cut 11A2, the remaining thickness TR2, which is the thickness of the remaining part of the carrier sheet 11 connected to the second cut 11A2 in the thickness direction, may satisfy the following formula when the thickness of the carrier sheet 11 is T. 0≦TR2≦3 / 4T

[0067] According to the skin adhesive sheet 10, the carrier sheet 11 can be peeled off from the base material 13A along the cuts 11A from both sides of the adhesive tape 13, so that the carrier sheet 11 can be easily peeled off.

[0068] In the ninth modified example shown in FIG. 14, the outer shape of the carrier sheet 11 has a rectangular shape. In the carrier sheet 11, the first region 11R1 surrounds the second region 11R2. The second region 11R2 has a rectangular shape, and the first region 11R1 has a frame shape surrounding the second region 11R2. Each of the cuts 11A1, 11A2 extends along the longitudinal direction. The base ends 11A1P, 11A1P of the cuts 11A1, 11A2 are located on the same straight line extending along the longitudinal direction. The tips 11A1D, 11A2D of the cuts 11A1, 11A2 are located within the second region 11R2. In the longitudinal direction, the tip 11A1D of the first cut 11A1 is away from the tip 11A2D of the second cut 11A2.

[0069] The contours of the first to fourth modified examples may be combined with the slits 11A1 and 11A2 of the fifth to eighth modified examples. The contours of the first to fourth modified examples may be combined with the regions 11R1 and 11R2 and the slits 11A1 and 11A2 of the ninth modified example.

[0070] [Configuration of each layer] The structure of each layer of the skin patch sheet will be described below. The carrier sheet 11 is made of a synthetic resin. The carrier sheet 11 is made of, for example, a base sheet and a release layer. The release layer is laminated on the base sheet. When the carrier sheet 11 includes a base sheet and a release layer, the release layer is in contact with the base 13A of the application tape 13. The base sheet may be made of, for example, a polypropylene (PP) resin, a polyethylene terephthalate (PET) resin, or the like. The base sheet may be any one of a uniaxially oriented sheet, a biaxially oriented sheet, and a non-oriented sheet. The release layer may be made of, for example, a silicone resin.

[0071] The carrier sheet 11 may be composed of only the above-mentioned base sheet. In this case, the contact surface of the base sheet that contacts the base material 13A may be processed to facilitate peeling of the base material 13A from the base sheet. The processing of the contact surface of the base sheet may be, for example, embossing. The thickness of the carrier sheet 11 may be 10 μm or more and 400 μm or less, as described above.

[0072] The release sheet 12 is configured so that the peel strength between the release sheet 12 and the adhesive layer 13B is smaller than the peel strength between the carrier sheet 11 and the substrate 13A. The release sheet 12 is made of a synthetic resin. The release sheet 12 is made of, for example, a substrate sheet and a release layer. The release layer is laminated on the substrate sheet. When the release sheet 12 includes a substrate sheet and a release layer, the release layer is in contact with the adhesive layer 13B of the application tape 13. The substrate sheet may be made of, for example, a polyethylene terephthalate (PET) resin. The substrate sheet may be any one of a uniaxially oriented sheet, a biaxially oriented sheet, and a non-oriented sheet. The release layer may be made of, for example, a silicone resin.

[0073] The release sheet 12 may be composed of only the above-mentioned base sheet. In this case, the contact surface of the base sheet that contacts the adhesive layer 13B may be processed to facilitate peeling of the adhesive layer 13B from the base sheet. The processing of the contact surface of the base sheet may be, for example, embossing. The thickness of the release sheet 12 may be, for example, not less than 12 μm and not more than 350 μm.

[0074] The substrate 13A is made of synthetic resin. The synthetic resin for forming the substrate 13A may be, for example, polyurethane resin. This makes it possible to obtain the substrate 13A with high adhesion suitability. The thickness of the substrate 13A may be, for example, 5 μm or more and 30 μm or less. The substrate 13A, which is made of polyurethane resin and is thin, stretches well even when the external force applied to the substrate 13A to stretch the substrate 13A is small. Therefore, the substrate 13A has high conformability to the shape of the object to which the adhesive tape 13 is attached, and can have high adhesion to the object to which the adhesive tape 13 is attached.

[0075] On the other hand, the base material 13A, which has high conformability to the shape of the object to which it is attached, also has high conformability to the carrier sheet 11 covering the base material 13A. Therefore, when a force for peeling the carrier sheet 11 from the base material 13A acts on the carrier sheet 11, the base material 13A easily deforms in accordance with the deformation of the carrier sheet 11.

[0076] The tensile elongation at break of the substrate 13A may be, for example, 130% or more. The tensile elongation at break can be determined in accordance with JIS K 7161-1:2014 (ISO 527-1) "Plastics - Determination of tensile properties - Part 1: General rules" and JIS K 7127:1999 (ISO 527-3) "Plastics - Test methods for tensile properties - Part 3: Test conditions for films and sheets". When the measurement object does not have a yield point, the tensile breaking strain is measured, and when the measurement object has a yield point, the nominal tensile breaking strain is measured, and the tensile breaking elongation can be determined using these measured values.

[0077] The 100% elongation tensile strength of the substrate 13A may be, for example, 4 N / cm or less. The 100% elongation tensile strength is the value obtained by dividing the magnitude of the force measured when the strain reaches a specified value (100%) as defined in JIS K 7161-1:2014 (ISO 527-1) "Plastics - Determination of tensile properties - Part 1: General" by the width of the test piece. The 100% elongation tensile strength (T) (N / cm) can be calculated by the following formula.

[0078] T = F / W In the above formula, F is the magnitude of the measured force (N) and W is the width of the test piece (cm).

[0079] The base material 13A may be made of a synthetic resin other than polyurethane resin, such as polyvinylidene fluoride resin, ethylene-vinyl acetate copolymer resin, polypropylene resin, and polyethylene terephthalate resin.

[0080] The adhesive layer 13B is formed of a synthetic resin, similar to the base material 13A. The synthetic resin for forming the adhesive layer 13B may be, for example, a polyurethane resin. The thickness of the adhesive layer 13B may be, for example, 5 μm or more and 25 μm or less.

[0081] At least one of the base material 13A and the adhesive layer 13B may contain an active ingredient for the skin. That is, only the base material 13A may contain an active ingredient, only the adhesive layer 13B may contain an active ingredient, or both the base material 13A and the adhesive layer 13B may contain an active ingredient. The active ingredient may be, for example, a cosmetic ingredient, a beauty ingredient, a medicinal ingredient, or the like.

[0082] [Example] An example and a comparative example will be described with reference to FIG. [Example 1] A biaxially oriented polypropylene (OPP) sheet (Futamura Chemical Co., Ltd., FOR-MP, thickness 40 μm) with one matte surface among a pair of opposing surfaces was prepared as a carrier sheet. Then, an aqueous polyurethane containing an ether-based polyol (Mitsui Chemicals Co., Ltd., Takelac WS-6021) (Takelac is a registered trademark) was applied to the matte surface of the OPP film, and the aqueous polyurethane was dried to form a precursor layer. Next, the precursor layer was aged at room temperature to obtain a substrate having a thickness of 15 μm.

[0083] A release film (Cerapeel WZ, 75 μm thick, manufactured by Toray Film Processing Co., Ltd.) (Cerapeel is a registered trademark) consisting of a polyethylene terephthalate (PET) sheet and a release layer formed from silicone resin was prepared as a release sheet. Next, a urethane adhesive (SP-205, manufactured by Toyochem Co., Ltd.) as a base agent and a curing agent (T-501B, manufactured by Toyochem Co., Ltd.) were prepared. After adding the curing agent to the base agent, the base agent to which the curing agent had been added was stirred to obtain a coating liquid for forming an adhesive layer. The coating liquid was applied to the release film, and then the coating was dried to obtain an adhesive layer having a thickness of 15 μm.

[0084] Then, by bonding the substrate and the adhesive layer, a laminate was obtained in which the OPP sheet, the adhesive tape, and the release sheet were laminated in the order described above. Next, the laminate was subjected to half-cut processing so as to cut out an area having a rectangular shape, penetrating only the release sheet and the adhesive tape. Next, the parts of the release film and the adhesive tape other than the part subjected to the half-cut processing were removed from the OPP sheet. As a result, a release sheet and an adhesive tape having a length of 50 mm in the longitudinal direction and a length of 10 mm in the transverse direction, and an OPP sheet having a length of 50 mm in the longitudinal direction and a length of 20 mm in the transverse direction were obtained.

[0085] In the OPP sheet, two cuts were formed along the short side from the first side that does not overlap the adhesive tape to the second side that overlaps the adhesive tape among the sides that extend along the longitudinal direction and have a length of 50 mm. As a result, two cuts having a straight line shape and a length of 20 mm were formed. At this time, two cuts having a depth of 1 / 4T with respect to the thickness T of the OPP sheet were formed, and the distance between the cuts in the longitudinal direction was set to 4 mm. As a result, the skin patch sheet of Example 1 was obtained.

[0086] [Comparative Example 1] The skin patch sheet of Comparative Example 1 was obtained in the same manner as in Example 1, except that no cuts were made and the skin patch sheet cut out from the laminate was left to stand for 5 days in an environment of 60°C and a relative humidity of 90%.

[0087] [Comparative Example 2] A skin patch sheet of Comparative Example 2 was obtained in the same manner as in Example 1, except that in Example 1, the depth of the cut was changed to 1 / 5T, and the laminate after the cut was formed was allowed to stand for 5 days in an environment of 60°C and a relative humidity of 90%.

[0088] [Example 2] The skin patch sheet of Example 2 was obtained in the same manner as in Example 1, except that the laminate after forming the slits was left to stand for 5 days in an environment of 60°C and a relative humidity of 90%.

[0089] [Example 3] The skin patch sheet of Example 3 was obtained in the same manner as in Example 1, except that the depth of the cut was changed to 9 / 10T, and the laminate after the cuts were formed was allowed to stand for 5 days in an environment of 60°C and a relative humidity of 90%.

[0090] [Example 4] The skin patch sheet of Example 4 was obtained in the same manner as in Example 1, except that in Example 1, concentrated glycerin (Kanto Chemical Co., Ltd., 17029-08, quasi-drug raw material standard) was mixed into the coating liquid for forming the adhesive layer in an amount of 40% by weight relative to the solid content of the main component.

[0091] [Example 5] The skin patch sheet of Example 5 was obtained in the same manner as in Example 1, except that the laminate after forming the slits was left to stand for 10 days in an environment of 60°C and a relative humidity of 90%.

[0092] [Comparative Example 3] A skin patch sheet of Comparative Example 3 was obtained in the same manner as in Example 1, except that the laminate after forming the slits was left to stand for 15 days in an environment of 60°C and a relative humidity of 90%.

[0093] [Evaluation method] [Trouser tear strength] The tear strength of the carrier sheet was measured by a method conforming to JIS K 7128-1 (1998) "Test method for tear strength of plastic films and sheets, Part 1: Trouser tear method". At this time, a test piece having a width of 50 mm and a length of 150 mm was prepared from the carrier sheet of each Example and Comparative Example. Next, at one end in the longitudinal direction of the test piece, a slit was formed in the test piece starting from the center in the width direction and extending along the longitudinal direction, thereby forming a first piece portion and a second piece portion separated by the slit in the test piece. At this time, the length of the slit was set to 75 mm.

[0094] [180° peel strength] The peel strength of the substrate from the carrier sheet was measured by a method conforming to JIS Z 0237:2009 "Testing method for adhesive tapes and sheets". A universal testing machine (Shimadzu Corporation, Autograph AGS-X, load cell 5kN) was used to measure the peel strength. When measuring the peel strength, a test piece having a width of 25 mm was cut out from the skin patch sheet of each Example and Comparative Example. Then, after fixing the substrate to the universal testing machine, the strength when the carrier sheet was peeled off at 180° from the substrate was calculated. Then, using the universal testing machine, the first and second pieces were pulled in opposite directions to each other, and the tear strength (N / mm) was measured at the point when the tear amount reached 50 mm.

[0095] [Tearability] For each of the skin patch sheets of the Examples and Comparative Examples, the carrier sheet was torn from the portion of each cut that was located in the first region of the carrier sheet. The tearability at this time was evaluated according to the following standards. The tearability of each of the skin patch sheets of the Examples and Comparative Examples was evaluated five times.

[0096] ◯: The carrier sheet could be torn across the entire short side direction starting from the cut, allowing the carrier sheet to be smoothly peeled off from the substrate. Δ: The carrier sheet could be torn across the entire short side starting from the cut, but there was great resistance when tearing the carrier sheet.

[0097] [Evaluation Results] The evaluation results of the trouser tear strength, 180° peel strength and tearability are shown in FIG.

[0098] As shown in FIG. 15, the trouser tear strength was found to be 4.3 N / mm for the carrier sheets provided in the skin patch sheets of Examples 1 to 5 and Comparative Examples 1 to 3.

[0099] The 180° peel strength was found to be 85.1 mN / 25 mm in Example 1, and 592.0 mN / 25 mm in Examples 2, 3, Comparative Examples 1, and 2. The 180° peel strength was found to be 621.0 mN / 25 mm in Example 4, 1575.2 mN / 25 mm in Example 5, and 2123.0 mN / 25 mm in Comparative Example 3.

[0100] The tearability was evaluated as ○ in Examples 1 to 5, and △ in Comparative Examples 1 to 3. In detail, in Comparative Examples 1 and 2, since the depth of each cut was shallow, an external force was required to tear the remaining part of the carrier sheet, and this resulted in low tearability of the carrier sheet. In Comparative Example 3, since the adhesive strength between the carrier sheet and the substrate was high, when an external force was applied to the carrier sheet to peel the carrier sheet from the substrate, the application tape rose together with the carrier sheet, and this resulted in low tearability of the carrier sheet.

[0101] In addition, it was found that, among Examples 1, 2, and 4, the resistance when the carrier sheet was torn was the smallest in Example 1, which had the lowest 180° peel strength, and the resistance when the carrier sheet was torn was the largest in Example 4, which had the highest 180° peel strength. In addition, it was found that, in Examples 2, 3, Comparative Examples 1, and 2, the deeper the cut, the smaller the resistance when the carrier sheet was torn.

[0102] As described above, according to one embodiment of the skin adhesive sheet, the following effects can be obtained. (1) In the carrier sheet 11 having a thickness of 10 μm or more and 400 μm or less, the 180° peel strength is 2 N / 25 mm or less, and the depth of the slit 11A extending from the outside of the application tape 13 to the inside of the application tape 13 is in the range of 1 / 4T to T. Therefore, it is easy to peel the carrier sheet 11 from the substrate 13A starting from the slit 11A.

[0103] (2) In a carrier sheet 11 having a trouser tear strength of 10 N / mm or less, the 180° peel strength is 2 N / mm or less, and the remaining thickness TR1 of the carrier sheet 11 at a slit 11A extending from the outside of the application tape 13 to the inside of the application tape 13 is within the range of 0 to 3 / 4T. Therefore, the carrier sheet 11 can be easily peeled off from the substrate 13A starting from the slit 11A.

[0104] (3) The portion of the slit 11A located on the application tape 13 does not penetrate the carrier sheet 11. This prevents the substrate from being cut together with the carrier sheet during the production of the skin patch sheet 10, and also prevents foreign matter from reaching the substrate through the slit 11A before the skin patch sheet is used.

[0105] (4) The trouser tear strength is 10 N / mm or less, which makes it possible to improve the tearability of the carrier sheet 11. In addition, during the production of the skin adhesive sheet 10, the base material 13A is prevented from being cut together with the carrier sheet 11, and foreign matter is prevented from reaching the base material 13A through the cut 11A before the skin adhesive sheet 10 is used.

[0106] (5) When the base ends 11A1P, 11A2P of the cuts 11A1, 11A2 face each other across the adhesive tape 13, the carrier sheet 11 can be peeled off from the base material 13A along the cuts 11A1, 11A2 from both sides of the adhesive tape 13. This makes it easy to peel off the carrier sheet 11.

[0107] (6) When the skin adhesive sheet 10 has a gripping portion 11N defined by the slits 11A1 and 11A2, a user of the skin adhesive sheet 10 can grip the gripping portion 11N of the carrier sheet 11. This makes it easy to apply an external force to the carrier sheet 11 to peel the carrier sheet 11 from the base material 13A. [Explanation of symbols]

[0108] 10. Skin patch sheet 11...Career sheet 11A...gap 11A1...First cut 11A2...Second cut 11B…boundary 11R1…First area 11R2…Second area 12...Release sheet 13...Adhesive tape 13A…Base material 13B…adhesive layer

Claims

1. A carrier sheet, a release sheet, and an application tape located between the carrier sheet and the release sheet, the adhesive tape comprises: a substrate in contact with the carrier sheet and having a higher tensile elongation at break than the carrier sheet and the release sheet; and an adhesive layer in contact with the release sheet, the adhesive layer being attached to the skin after the release sheet is peeled off from the adhesive layer; an area of ​​the carrier sheet is larger than an area of ​​the application tape, and the carrier sheet includes a first region that is an area that does not overlap with the application tape and a second region that is an area that overlaps with the application tape; the carrier sheet has a slit extending from a portion of an outer edge of the carrier sheet that is included in the first region toward the attachment tape beyond the boundary between the first region and the second region when viewed from a viewpoint opposite to a plane on which the carrier sheet spreads, the 180° peel strength between the carrier sheet and the substrate in accordance with JIS Z 0237:2009 is 2 N / 25 mm or less; The thickness of the carrier sheet is 10 μm or more and 400 μm or less, The depth D1 of the cut satisfies the following formula when the thickness of the carrier sheet is T: 1 / 4T≦D1≦T Skin patch sheet.

2. A carrier sheet, a release sheet, and an application tape located between the carrier sheet and the release sheet, the adhesive tape comprises: a substrate in contact with the carrier sheet and having a higher tensile elongation at break than the carrier sheet and the release sheet; and an adhesive layer in contact with the release sheet, the adhesive layer being attached to the skin after the release sheet is peeled off from the adhesive layer; an area of ​​the carrier sheet is larger than an area of ​​the application tape, and the carrier sheet includes a first region that is an area that does not overlap with the application tape and a second region that is an area that overlaps with the application tape; the carrier sheet has a slit extending from a portion of an outer edge of the carrier sheet that is included in the first region toward the attachment tape beyond the boundary between the first region and the second region when viewed from a viewpoint opposite to a plane on which the carrier sheet spreads, the 180° peel strength between the carrier sheet and the substrate in accordance with JIS Z 0237:2009 is 2 N / 25 mm or less; The carrier sheet has a trouser tear strength of 10 N / mm or less according to JIS K 7128-1:1998; In the thickness direction of the carrier sheet, a remaining thickness TR1 of the carrier sheet connected to the cut line satisfies the following formula when the thickness of the carrier sheet is T: 0≦TR1≦3 / 4T Skin patch sheet.

3. The depth of the cut at the portion of the carrier sheet that overlaps the application tape is shallower than the depth of the portion of the carrier sheet that does not overlap the application tape.

3. The skin patch sheet according to claim 1 or 2.

4. a depth of the cut at a portion of the carrier sheet that overlaps the application tape is shallower than a depth of a portion of the carrier sheet that does not overlap the application tape; The carrier sheet has a trouser tear strength of 10 N / mm or less according to JIS K 7128-1:1998. The skin patch sheet according to claim 1.

5. The cut is a first cut, the carrier sheet further includes a second cut extending from a portion of the outer edge of the carrier sheet that is included in the first region toward the attachment tape beyond the boundary between the first region and the second region when viewed from a viewpoint opposite to the plane on which the carrier sheet spreads, The depth D2 of the second cut satisfies the following formula when the thickness of the carrier sheet is T: Among the cuts, the base ends located on the outer edge of the carrier sheet face each other with the application tape therebetween. 1 / 4T≦D2≦T The skin patch sheet according to claim 1.

6. The cut is a first cut, the carrier sheet further includes a second cut extending from a portion of the outer edge of the carrier sheet that is included in the first region toward the attachment tape beyond the boundary between the first region and the second region when viewed from a viewpoint opposite to the plane on which the carrier sheet spreads, The depth D2 of the second cut satisfies the following formula when the thickness of the carrier sheet is T: When viewed from a viewpoint opposite to a plane along which the carrier sheet extends, the first cuts and the second cuts are arranged at intervals along a first direction, and each cut extends along a second direction intersecting the first direction; The carrier sheet includes a gripping portion that is sandwiched between the first cut and the second cut and extends along the second direction. 1 / 4T≦D2≦T The skin patch sheet according to claim 1.

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