Skin patch

Abstract

A region of the carrier sheet that does not overlap with the adhesive tape is a first region, and a region that overlaps with the adhesive tape is a second region. The carrier sheet has a slit extending beyond the boundary between the first region and the second region from a portion of the outer edge of the carrier sheet included in the first region toward the adhesive tape from a view facing the plane where the carrier sheet is unfolded. The 180 DEG peel strength between the carrier sheet and the base material according to JIS Z 0237: 2009 is 2 N / 25 mm or less. The carrier sheet has a thickness of 10 [mu] m to 400 [mu] m. When the thickness of the carrier sheet 11 is T, the depth D1 of the break joint satisfies 1 / 4T < = D1 < = T.

Description

Technical Field

[0001] This disclosure relates to skin patches. Background Technology

[0002] Skin patches are widely used for purposes such as externally protecting affected areas of the skin or externally concealing a portion of the skin. The patch includes an adhesive strip sandwiched between a carrier sheet and a release liner. The adhesive strip has a substrate that contacts the carrier sheet and an adhesive layer that contacts the release liner. When using the patch, the release liner is first peeled off from the adhesive layer. Then, the laminate of the adhesive strip and the carrier sheet is adhered to the skin through the adhesive layer. Next, the carrier sheet is peeled off from the substrate (see, for example, Patent Document 1).

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent No. 6706398 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] However, for substrates that are adhered to the skin, a high elongation at break, such as that of polyurethane, is required to achieve skin conformability. On the other hand, because such substrates also have high adhesion to polyolefin-based or polyester-based carrier sheets, it is difficult to peel the carrier sheet off the substrate adhered to the skin.

[0008] Methods for solving problems

[0009] One type of skin patch includes a carrier sheet, a release liner, and an adhesive tape located between the carrier sheet and the release liner. The adhesive tape comprises: a substrate that contacts the carrier sheet and has a higher elongation at break than both the carrier sheet and the release liner; and an adhesive layer that contacts the release liner and adheres to the skin after the release liner 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 does not overlap with the adhesive tape and a second region that overlaps with the adhesive tape. Viewed from a plane opposite to the unfolded surface of the carrier sheet, the carrier sheet has a slit extending from the outer edge of the carrier sheet, contained in the first region, toward the adhesive tape and beyond the boundary between the first and second regions. The 180° peel strength between the carrier sheet and the substrate, according to JIS Z 0237:2009, is 2 N / 25 mm or less. The thickness of the carrier sheet is 10 μm to 400 μm. When the thickness of the carrier sheet is T, the depth D1 of the fracture satisfies the following formula.

[0010] 1 / 4T≤D1≤T

[0011] One type of skin patch includes a carrier sheet, a release liner, and an adhesive tape located between the carrier sheet and the release liner. The adhesive tape comprises: a substrate that contacts the carrier sheet and has a higher elongation at break than both the carrier sheet and the release liner; and an adhesive layer that contacts the release liner and adheres to the skin after the release liner 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 does not overlap with the adhesive tape and a second region that overlaps with the adhesive tape. Viewed from a plane opposite to the unfolded surface of the carrier sheet, the carrier sheet has a seam extending from a portion of the outer edge of the carrier sheet contained in the first region toward the adhesive tape and beyond the boundary between the first and second regions. The 180° peel strength between the carrier sheet and the substrate, according to JIS Z 0237:2009, is less than 2 N / 25 mm. In the carrier sheet, the trouser tear strength according to JIS K 7128-1:1998 is 10 N / mm or less. When the thickness of the carrier sheet is T, the residual thickness TR1 of the carrier sheet connected to the fracture in the thickness direction satisfies the following formula.

[0012] 0≤TR1≤3 / 4T Attached Figure Description

[0013] [ Figure 1 ] Figure 1 This is a cross-sectional view showing the structure of the skin patch.

[0014] [ Figure 2 ] Figure 2 It is shown Figure 1 A plan view of the structure of the skin patch shown.

[0015] [ Figure 3 ] Figure 3 It is shown Figure 1 The image shows a cross-sectional view of a portion of the carrier sheet and a portion of the substrate in the skin patch.

[0016] [ Figure 4 ] Figure 4 This is a plan view showing the structure of the first modified example of the skin patch.

[0017] [ Figure 5 ] Figure 5 This is a plan view showing the structure of the second modified example of the skin patch.

[0018] [ Figure 6 ] Figure 6This is a plan view showing the structure of the third modified example of the skin patch.

[0019] [ Figure 7 ] Figure 7 This is a plan view showing the structure of the fourth modified example of the skin patch.

[0020] [ Figure 8 ] Figure 8 This is a plan view showing the structure of the fifth modified example of the skin patch.

[0021] [ Figure 9 ] Figure 9 This is a plan view showing the structure of the sixth modified example of the skin patch.

[0022] [ Figure 10 ] Figure 10 This is a plan view showing the structure of the seventh modified example of the skin patch.

[0023] [ Figure 11 ] Figure 11 This is a plan view showing the structure of the eighth modified example of the skin patch.

[0024] [ Figure 12 ] Figure 12 This is a plan view showing the structure of the 9th modified example of the skin patch.

[0025] [ Figure 13 ] Figure 13 This is a plan view showing the structure of the 10th variation of the skin patch.

[0026] [ Figure 14 ] Figure 14 This is a plan view showing the structure of the 11th variation of the skin patch.

[0027] [ Figure 15 ] Figure 15 This is a table showing the evaluation results of the skin patches of the embodiments and comparative examples. Detailed Implementation

[0028] Reference Figures 1 to 15 One embodiment of the skin patch will be described.

[0029] [Skin patch]

[0030] Reference Figures 1 to 3 The first and second components of the skin patch disclosed herein will be described. Hereinafter, after explaining the commonalities between the first and second components, the first and second components will be described sequentially.

[0031] like Figure 1As shown, the skin patch 10 includes a carrier sheet 11, a release liner 12, and an adhesive tape 13 located between the carrier sheet 11 and the release liner 12. The adhesive tape 13 includes a substrate 13A and an adhesive layer 13B. The substrate 13A contacts the carrier sheet 11 and has a higher elongation at break than the carrier sheet 11 and the release liner 12. The adhesive layer 13B contacts the release liner 12. The adhesive layer 13B is adhered to the skin after the release liner 12 is peeled off from the adhesive layer 13B.

[0032] The 180° peel strength between the carrier sheet 11 and the substrate 13A, according to JIS Z 0237:2009, is 2 N / 25 mm or less. The 180° peel strength is a value determined by the method according to JIS Z 0237:2009 "Test Method for Adhesive Tapes and Adhesive Sheets".

[0033] like Figure 2 As shown, the area of ​​the carrier sheet 11 is larger than the area of ​​the adhesive tape 13. Viewed from a plane opposite to the unfolded skin patch 10, the overall area of ​​the carrier sheet 11 is larger than the overall area of ​​the adhesive tape 13. The area of ​​the carrier sheet 11 that does not overlap with the adhesive tape 13 is the first region 11R1, and the area that overlaps with the adhesive tape 13 is the second region 11R2. The carrier sheet 11 is composed of the first region 11R1 and the second region 11R2, and the sum of the areas of the first region 11R1 and the second region 11R2 is greater than the area of ​​the adhesive tape 13. Figure 2 In the example shown, the peeler 12 has the same shape as the adhesive tape 13.

[0034] The carrier sheet 11 has a slit 11A. Figure 2 In the example shown, the carrier sheet 11 has only one slit 11A. Viewed from a perspective opposite to the unfolded plane of the carrier sheet 11, the slit 11A extends from the portion of the outer edge 11E of the carrier sheet 11 contained in the first region 11R1 toward the adhesive tape 13 and beyond the boundary 11B between the first region 11R1 and the second region 11R2.

[0035] The fracture 11A has a base end 11AP and a front end 11AD. The base end 11AP of the fracture 11A is located in the portion of the outer edge 11E of the carrier sheet 11 contained in the first region 11R1. In contrast, the front end 11AD of the fracture 11A is located in the portion of the outer edge 11E of the carrier sheet 11 contained in the second region 11R2. The front end 11AD of the fracture 11A may also be located in the second region 11R2 of the carrier sheet 11, in a region further inward than the outer edge 11E.

[0036] That is, in Figure 2In the example shown, the carrier sheet 11 has a rectangular shape, and the first region 11R1 and the second region 11R2 are arranged along the short side. The slit 11A has a length spanning the entire short side of the carrier sheet 11. It should be noted that the slit 11A may also have a length spanning the entire first region 11R1 along the short side of the carrier sheet 11 and extending to the middle of the second region 11R2.

[0037] like Figure 2 As shown, the fracture 11A can be straight. Alternatively, the fracture 11A can be curved or broken. In the case where the fracture 11A is broken, it can have only one bend or more bends.

[0038] Figure 3 It is a cross-sectional view including a portion of the carrier sheet 11 and a portion of the substrate 13A. Figure 3 It is also a cross-sectional view along the plane containing the fracture 11A of the carrier piece 11.

[0039] exist Figure 3 In the example shown, the slit 11A has a depth D1 that extends only to a portion of the carrier sheet 11 in the thickness direction. The slit 11A may also have a depth D1 that spans the entire carrier sheet 11 in the thickness direction. When the slit 11A has a depth D1 that extends only to a portion of the carrier sheet 11 in the thickness direction, the carrier sheet 11 has a residual portion 11RE connected to the slit 11A in the thickness direction of the carrier sheet 11. The residual portion 11RE of the carrier sheet 11 has a residual thickness TR1 obtained by subtracting the depth D1 of the slit 11A from the thickness T of the carrier sheet 11.

[0040] The fracture 11A is composed of a first part 11AA and a second part 11AB. The first part 11AA is the portion of the fracture 11A located in the first region 11R1 of the carrier piece 11. The second part 11AB is the portion of the fracture 11A located in the second region 11R2 of the carrier piece 11. Figure 3 In the example shown, the depth of part 11AA is equal to the depth of part 21AB. The depth of part 11AA may also be different from the depth of part 21AB.

[0041] [First Composition]

[0042] The first component of the skin patch 10 satisfies the following conditions.

[0043] (Condition 1-1) The thickness of the carrier sheet 11 is more than 10 μm and less than 400 μm.

[0044] (Condition 1-2) When the thickness of the carrier piece 11 is T, the depth D1 of the fracture 11A satisfies the following formula.

[0045] 1 / 4T≤D1≤T

[0046] In the carrier sheet 11 with a thickness of 10 μm to 400 μm, the 180° peel strength is 2 N / 25 mm or less, and the depth D1 of the slit 11A extending from outside the adhesive tape 13 into the adhesive tape 13 is within the range of 1 / 4T to T. Therefore, the carrier sheet 11 can be easily peeled from the substrate 13A starting from the slit 11A. It should be noted that in this disclosure, the adhesion strength between the carrier sheet 11 and the substrate 13A is evaluated by the 180° peel strength.

[0047] From the viewpoint that it is easy to peel off the carrier sheet 11 starting from the slit 11A, the depth D1 of the slit 11A is preferably deeper. Therefore, the lower limit of the depth D1 can be 1 / 2T or 3 / 4T. From the viewpoint of preventing the substrate 13A from being cut during the manufacture of the skin patch 10, and from the viewpoint of preventing foreign objects from reaching the substrate 13A through the slit 11A, the depth D1 of the slit 11A is preferably shallower. Therefore, the depth D1 can be less than T. In addition, the upper limit of the depth D1 can be 3 / 4T or 1 / 2T.

[0048] That is, from the viewpoint of easy peeling, the depth D1 of the fracture 11A can be, for example, more than 1 / 2T and less than T, or more than 3 / 4T and less than T. From the viewpoint of preventing the substrate 13A from being cut and preventing the arrival of foreign objects, the depth D1 of the fracture 11A can be, for example, more than 1 / 4T and less than T, or more than 1 / 4T and less than 3 / 4T, or more than 1 / 4T and less than 1 / 2T. From the viewpoint of balancing easy peeling, preventing the substrate 13A from being cut, and preventing the arrival of foreign objects, the depth of the fracture 11A can be, for example, more than 1 / 2T and less than T, or more than 1 / 2T and less than 3 / 4T.

[0049] Skin patch 10 can meet the following conditions 1-3 and 1-4.

[0050] (Conditions 1-3) In the fracture 11A, the depth of the portion of the carrier sheet 11 that overlaps with the adhesive tape 13 is shallower than the depth of the portion of the carrier sheet 11 that does not overlap with the adhesive tape 13. That is, the depth of the first part 11AA of the fracture 11A is deeper than the depth of the second part 11AB of the fracture 11A.

[0051] In the slit 11A, the portion located on the adhesive tape 13 does not penetrate the carrier sheet 11. Therefore, when manufacturing the skin patch 10, it is possible to prevent the substrate 13A from being cut together with the carrier sheet 11, and it is possible to prevent foreign objects from reaching the substrate through the slit 11A before using the skin patch 10.

[0052] (Conditions 1-4) In the carrier piece 11, the trouser tear strength according to JIS K 7128-1:1998 is less than 10 N / mm.

[0053] Since the trouser tear strength is below 10 N / mm, the tear resistance of the carrier sheet 11 can be improved, and the substrate 13A can be prevented from being cut together with the carrier sheet 11 during the manufacture of the skin patch 10. Additionally, it prevents foreign objects from reaching the substrate 13A via the tear 11A before the skin patch 10 is used. The lower limit of the trouser tear strength can be greater than 0, for example, it can be 0.01 N / mm.

[0054] When the skin patch 10 satisfies conditions 1-4, the depth of the first part 11AA can be equal to the thickness T, while the depth of the second part 11AB can be less than the thickness T. Alternatively, when the skin patch 10 satisfies conditions 1-4, both the depth of the first part 11AA and the depth of the second part 11AB can be less than the thickness T. From the viewpoint that the carrier sheet 11 is easily torn starting from the fracture 11A, the depth of the first part 11AA is preferably equal to the thickness T.

[0055] [Second Composition]

[0056] The second component of the skin patch 10 satisfies the following conditions.

[0057] (Condition 2-1) In the carrier piece 11, the trouser tear strength according to JIS K 7128-1:1998 is less than 10 N / mm.

[0058] (Condition 2-2) When the thickness of the carrier sheet 11 is T, the thickness of the remaining part 11RE of the carrier sheet 11 connected to the fracture 11A in the thickness direction of the carrier sheet 11, i.e. the residual thickness TR1, satisfies the following formula.

[0059] 0≤TR1≤3 / 4T

[0060] In the carrier sheet 11, the tear strength is 10 N / mm or less, the 180° peel strength is 2 N / mm or less, and the residual thickness of the carrier sheet 11 in the slit 11A extending from outside the adhesive tape 13 into the adhesive tape 13 is in the range of 0 to 3 / 4 T. Therefore, the carrier sheet 11 can be easily peeled from the substrate 13A starting from the slit 11A.

[0061] From the viewpoint of easily peeling off the carrier sheet 11 starting from the fracture 11A, the residual thickness TR1 of the fracture 11A is preferably thinner. Therefore, the upper limit of the residual thickness TR1 can be 1 / 2T or 1 / 4T. From the viewpoint of preventing the substrate 13A from being cut during the manufacture of the skin patch 10, and from the viewpoint of preventing foreign objects from reaching the substrate 13A through the fracture 11A, the residual thickness TR1 of the fracture 11A is preferably thicker. Therefore, the residual thickness TR1 can also be greater than 0. In addition, the upper limit of the residual thickness TR1 can be 1 / 4T or 1 / 2T.

[0062] That is, from the viewpoint of easy peeling, the residual thickness TR1 can be 0 to 1 / 2T or less, or 0 to 1 / 4T or less. From the viewpoint of preventing the substrate 13A from being cut and preventing foreign matter from reaching the substrate, the residual thickness TR1 can be greater than 0 and less than 3 / 4T, or more than 1 / 4T and less than 3 / 4T, or more than 1 / 2T and less than 3 / 4T. From the viewpoint of balancing easy peeling, preventing the substrate 13A from being cut, and preventing foreign matter from reaching the substrate, the residual thickness TR1 can, for example, be greater than 0 and less than 1 / 2T, or more than 1 / 4T and less than 1 / 2T.

[0063] Skin patch 10 can meet the following conditions 2-3.

[0064] (Condition 2-3) In the fracture 11A, the residual thickness of the portion of the carrier sheet 11 that overlaps with the adhesive tape 13 is thinner than the residual thickness of the portion of the carrier sheet 11 that does not overlap with the adhesive tape 13. That is, the residual thickness of the first part 11AA of the fracture 11A is thinner than the residual thickness of the second part 11AB of the fracture 11A.

[0065] In the slit 11A, the portion located on the adhesive tape 13 does not penetrate the carrier sheet 11. Therefore, when manufacturing the skin patch 10, it is possible to prevent the substrate 13A from being cut together with the carrier sheet, and it is possible to prevent foreign objects from reaching the substrate through the slit 11A before using the skin patch 10.

[0066] When the skin patch 10 satisfies conditions 2-3, the residual thickness of the first part 11AA can be 0, while the residual thickness of the second part 11AB can be greater than 0. Alternatively, when the skin patch 10 satisfies conditions 2-3, both the residual thickness of the first part 11AA and the residual thickness of the second part 11AB can be less than the thickness T. From the viewpoint that the carrier sheet 11 is easily torn starting from the fracture 11A, the residual thickness of the first part 11AA is preferably 0.

[0067] Thus, the carrier sheet 11 can be easily peeled off from the substrate 13A starting from the fracture 11A using either the first or second configuration of the skin patch 10. It should be noted that when the substrate 13A or the adhesive layer 13B contains an effective ingredient for the skin, or when the skin patch 10 is stored in an environment satisfying 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 patch 10 of this disclosure, even with further increased adhesive strength, the carrier sheet 11 can still be easily peeled off from the substrate 13A.

[0068] Alternatively, the first and second configurations can be combined. That is, the skin patch satisfies conditions 1-1 and 2-1, and the suture 11A satisfies both conditions 1-2 and 2-2.

[0069] [Variation Example]

[0070] like Figures 4 to 14 As shown, the first and second components of the skin patch 10 can be implemented by the following modifications.

[0071] exist Figures 4 to 9 In the skin patch 10 shown, compared with the reference Figures 1 to 3 Compared to the described skin patch 10, the skin patch 10 has a different shape. Additionally, in... Figure 9 In the skin patch 10 shown, compared with the reference Figures 1 to 3 Compared to the skin patch 10, the number of regions 11R1 is different.

[0072] exist Figure 4 In the first modified example shown, the carrier sheet 11 has an octagonal shape. The carrier sheet 11 is also a rectangle with its corners cut off. The slit 11A has a length spanning the entire length of the carrier sheet 11. The adhesive tape 13 and the release liner 12 have approximately rectangular shapes. In the adhesive tape 13 and the release liner 12, two adjacent corners in the width direction of the rectangle are cut off.

[0073] exist Figure 5 In the second variation shown, the carrier sheet 11 has a hexagonal shape. The carrier sheet 11 is also a rectangle with two adjacent corners cut off in the width direction. The slit 11A has a length spanning the entire length of the carrier sheet 11. The adhesive tape 13 and the release liner 12 also have hexagonal shapes. The adhesive tape 13 and the release liner 12 are also rectangles with two adjacent corners cut off in the width direction.

[0074] exist Figure 6In the third variation shown, the carrier piece 11 has a circular shape. The slit 11A passes through the center of the carrier piece 11 and has a length equal to the diameter of the carrier piece 11. The shapes of the adhesive tape 13 and the peeling strip 12 are defined by a dominant arc concentric with the carrier piece 11 and a chord connecting the two ends of the dominant arc.

[0075] exist Figure 7 In the fourth variation shown, the shape of the carrier piece 11 is formed by 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 and second elliptical arcs are major arcs. The slit 11A has a length spanning the entire first region 11R1 and the second region 11R2. The shapes of the adhesive tape 13 and the release liner 12 are elliptical. The shapes of the adhesive tape 13 and the release liner 12 are concentric with the second elliptical arc. In the shapes of the adhesive tape 13 and the release liner 12, the lengths of the minor and major axes are the same as those of the second elliptical arc. The first region 11R1 is surrounded by the first elliptical arc. The second region 11R2 is surrounded by the second elliptical arc.

[0076] exist Figure 8 In the fifth variation shown, the carrier sheet 11 has a generally circular shape. The carrier sheet 11 also has a generally teardrop shape extending along its length. First region 11R1 and second region 11R2 are arranged along the length. First region 11R1 has a groove 11R1G recessed towards second region 11R2 at a position opposite the boundary 11B of first region 11R1 and second region 11R2 along its length. A slit 11A has an end at the valley of the groove 11R1G and has a length spanning the entire length direction. First region 11R1 is divided into a first holding portion R1N1 and a second holding portion R1N2 by the slit 11A. The shapes of the adhesive tape 13 and the release tab 12 are defined by a generally arcuate arcuate segment included in the shape of the carrier sheet 11, and a straight line segment connecting the two ends of the arcuate segment and extending along its width.

[0077] According to the fifth variation of the skin patch 10, the user of the skin patch 10 pinches the first pinching portion R1N1 and the second pinching portion R1N2 of the clamping groove 11R1G, and then, by stretching the first pinching portion R1N1 and the second pinching portion R1N2 in a direction away from each other, the carrier sheet 11 can be torn along the seam 11A. Therefore, the carrier sheet 11 is easily torn.

[0078] exist Figure 9In the sixth variation shown, similar to the first variation of the skin patch 10, the carrier sheet 11 has an octagonal shape. The carrier sheet 11 is also a rectangle with its corners cut off. The slit 11A has a length spanning the entire length of the carrier sheet 11. On the other hand, the adhesive tape 13 and the release liner 12 have rectangular shapes. Therefore, in the length direction of the skin patch 10, the two ends of the carrier sheet 11 do not overlap with the adhesive tape 13. That is, the carrier sheet 11 has two first regions 11R1 and one second region 11R2. In the length direction of the carrier sheet 11, the second region 11R2 is held between the two first regions 11R1. Because the second region 11R2 is held between the two first regions 11R1, the carrier sheet 11 can be easily torn from both sides along the slit 11A in the length direction.

[0079] exist Figures 10 to 14 In the skin patch 10 shown, compared with the reference Figures 1 to 3 Compared to the skin patch 10, the carrier patch 11 has a different number of slits 11A. Figures 10 to 14 The skin patch 10 shown has a carrier sheet 11 with two slits 11A. It should be noted that the carrier sheet 11 only needs to have one or more slits 11A, as shown in the diagram. Figures 10 to 14 The skin patch shown in Figure 10 can be in the form of 2 pieces, or more than 3 pieces.

[0080] Among them, Figures 10 to 13 In the skin patch 10 shown, the carrier sheet 11 has a first slit 11A1 and a second slit 11A2. The first slit 11A1 has the same configuration as the slit 11A described above in the first or second configuration. Similar to the first slit 11A1, viewed from a plane opposite to the unfolded plane of the carrier sheet 11, the second slit 11A2 extends from the portion of the carrier sheet 11's outer edge 11E contained in the first region 11R1 toward the adhesive tape 13 and beyond the boundary 11B between the first region 11R1 and the second region 11R2. Similar to the depth D1 of the first slit 11A1, when the thickness of the carrier sheet 11 is T, the depth D2 of the second slit 11A2 satisfies the following formula.

[0081] 1 / 4T≤D2≤T

[0082] It should be noted that in the second fracture 11A2, when the thickness of the carrier piece 11 is T, the thickness of the remaining part of the carrier piece 11 connected to the second fracture 11A2 in the thickness direction, i.e., the residual thickness TR2, can satisfy the following formula.

[0083] 0≤TR2≤3 / 4T

[0084] Viewed from a perspective opposite to the unfolded plane of the carrier sheet 11, the first slit 11A1 and the second slit 11A2 are arranged at intervals along a first direction, and each slit 11A1, 11A2 extends along a second direction intersecting the first direction. The carrier sheet 11 has a gripping portion 11N that is held by the first slit 11A1 and the second slit 11A2 and extends along the second direction.

[0085] Since the user of the skin patch 10 can hold the gripping portion 11N of the carrier patch 11, it is easy to apply an external force to the carrier patch 11 to peel it off from the substrate 13A. The structures of various modified examples will now be described in more detail with reference to the accompanying drawings. It should be noted that in... Figures 10 to 13 In the various modified examples shown, the carrier piece 11 has a rectangular shape.

[0086] exist Figure 10 In the seventh variation shown, both the first slit 11A1 and the second slit 11A2 have a length spanning the entire width direction of the skin patch 10. The first slit 11A1 and the second slit 11A2 are arranged at intervals along the length direction of the skin patch 10. The length direction is an example of a first direction. The first slit 11A1 is parallel to the second slit 11A2. The first slit 11A1 and the second slit 11A2 define a pinching portion 11N with a rectangular shape extending along the width direction. The width direction is an example of a second direction.

[0087] exist Figure 11 In the eighth variation shown, each of the slits 11A1 and 11A2 extends in a direction intersecting the width direction. The first slit 11A1 extends in the width direction and is symmetrical about the second slit 11A2 in the length direction with respect to the axis of symmetry passing through the center of the carrier piece 11. The distance between the first slit 11A1 and the second slit 11A2 in the length direction gradually increases from the base end 11A1P of the first slit 11A1 towards the front end 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 front end 11A1D of the first slit 11A1 and the front end 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.

[0088] exist Figure 12In the ninth variation shown, the first slit 11A1 has a straight shape along its width direction midway from the front end 11A1D toward the base end 11A1P, and a shape that bends in a manner similar to the second slit 11A2 midway from the front end 11A1D toward the base end 11A1P. The second slit 11A2 has a straight shape along its width direction midway from the front end 11A2D toward the base end 11A2P, and a shape that bends in a manner similar to the first slit 11A1 midway from the front end 11A2D toward the base end 11A2P. The base end 11A2P of the second slit 11A2 is connected to the base end 11A1P of the first slit 11A1 at the outer edge 11E of the carrier piece 11. The front ends 11A1D and 11A2D of each slit 11A1 and 11A2 are located within the second region 11R2.

[0089] The first slit 11A1 extends along the width direction and is symmetrical about the second slit 11A2 in the length direction with respect to the axis of symmetry passing through the center of the carrier piece 11. The shape formed by the first slit 11A1 and the second slit 11A2 is U-shaped. The distance between the first slit 11A1 and the second slit 11A2 gradually increases in length from the base end 11A1P of the first slit 11A1 towards the front end 11A1D and then becomes constant.

[0090] exist Figure 13 In the 10th variation shown, each slit 11A1, 11A2 extends along the width direction. The front ends 11A1D, 11A2D of each slit 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 slit 11A1, 11A2. In other words, the gripping portion 11N includes a portion that protrudes more than the base ends 11A1P, 11A2P relative to the base ends 11A1P, 11A2P toward the side opposite to the front ends 11A1D, 11A2D.

[0091] In each modified example, from the viewpoint of easily gripping the holding part 11N, the depths D1 and D2 of the portion of each slit 11A1 and 11A2 located in the first region 11R1 are preferably equal to the thickness T of the carrier sheet 11. That is, the residual thicknesses TR1 and TR2 of each slit 11A1 and 11A2 are preferably 0.

[0092] exist Figure 14In the 11th variation of the skin patch 10 shown, the carrier sheet 11 has a first slit 11A1 and a second slit 11A2. The first slit 11A1 has the same configuration as the slit 11A in the first or second configuration described above. Similar to the first slit 11A1, from a view opposite to the plane in which the carrier sheet 11 unfolds, the second slit 11A2 extends from the portion of the outer edge 11E of the carrier sheet 11 contained in the first region 11R1 toward the adhesive tape 13 and beyond the boundary 11B between the first region 11R1 and the second region 11R2.

[0093] Similar to the depth D1 of the first slit 11A1, the depth D2 of the second slit 11A2, when the thickness of the carrier sheet 11 is T, satisfies the following formula. The base ends 11A1P and 11A2P of each slit 11A1 and 11A2 located at the outer edge 11E of the carrier sheet 11 are opposite to each other through the adhesive tape.

[0094] 1 / 4T≤D2≤T

[0095] It should be noted that in the second fracture 11A2, when the thickness of the carrier piece 11 is T, the thickness of the remaining part of the carrier piece 11 connected to the second fracture 11A2 in the thickness direction, i.e., the residual thickness TR2, can satisfy the following formula.

[0096] 0≤TR2≤3 / 4T

[0097] According to the skin patch 10, the carrier sheet 11 can be peeled off from the substrate 13A from both sides of the adhesive tape 13 along the seam 11A, so the carrier sheet 11 is easy to peel off.

[0098] exist Figure 14 In the 11th variation shown, the carrier piece 11 has a rectangular shape. In the carrier piece 11, a first region 11R1 surrounds a second region 11R2. The second region 11R2 has a rectangular shape, and the first region 11R1 has a frame-like structure surrounding the second region 11R2. Each slit 11A1, 11A2 extends along the length direction. The base ends 11A1P, 11A2P of each slit 11A1, 11A2 are located on the same straight line extending along the length direction. The front ends 11A1D, 11A2D of each slit 11A1, 11A2 are located within the second region 11R2. In the length direction, the front end 11A1D of the first slit 11A1 is farther from the front end 11A2D of the second slit 11A2.

[0099] It should be noted that the shapes of each of the first to sixth modifications and the fractures 11A1 and 11A2 of each of the seventh to tenth modifications can also be combined. Alternatively, the shapes of each of the first to sixth modifications and the regions 11R1 and 11R2 and the fractures 11A1 and 11A2 of the eleventh modification can also be combined.

[0100] [Composition of each layer]

[0101] The following explains the composition of each layer of a skin patch.

[0102] The carrier sheet 11 is formed of synthetic resin. The carrier sheet 11 is formed, for example, of a substrate sheet and an anti-adhesive layer. The anti-adhesive layer is laminated on the substrate sheet. When the carrier sheet 11 has a substrate sheet and an anti-adhesive layer, the anti-adhesive layer is in contact with the substrate 13A of the adhesive tape 13. The substrate sheet can be formed, for example, of polypropylene (PP) resin, polyethylene terephthalate (PET) resin, etc. The substrate sheet can be any of a uniaxially stretched sheet, a biaxially stretched sheet, and an unstretched sheet. The anti-adhesive layer can be formed, for example, of silicone resin.

[0103] The carrier sheet 11 may also be composed solely of the aforementioned substrate sheet. In this case, the contact surface of the substrate sheet that contacts the substrate 13A may be processed to facilitate the peeling of the substrate 13A from the substrate sheet. The processing of the contact surface of the substrate sheet may include, for example, embossing.

[0104] As described above, the thickness of the carrier sheet 11 can be between 10 μm and 400 μm.

[0105] The release tab 12 is configured such that the peel strength between the release tab 12 and the adhesive layer 13B is less than the peel strength between the carrier sheet 11 and the substrate 13A. The release tab 12 is formed of synthetic resin. The release tab 12 is formed, for example, of a substrate sheet and an anti-adhesive layer. The anti-adhesive layer is laminated on the substrate sheet. When the release tab 12 has a substrate sheet and an anti-adhesive layer, the anti-adhesive layer is in contact with the adhesive layer 13B of the adhesive tape 13. The substrate sheet can be formed, for example, of polyethylene terephthalate (PET) resin. The substrate sheet can be any of a uniaxially stretched sheet, a biaxially stretched sheet, and an unstretched sheet. The anti-adhesive layer can be formed, for example, of silicone resin.

[0106] The release tab 12 may also be composed solely of the aforementioned substrate sheet. In this case, a process can be performed on the contact surface of the substrate sheet that contacts the adhesive layer 13B to facilitate the peeling of the adhesive layer 13B from the substrate sheet. The processing of the contact surface of the substrate sheet may include, for example, embossing.

[0107] The thickness of the release sheet 12 can be, for example, 12 μm or more and 350 μm or less.

[0108] The substrate 13A is formed of a synthetic resin. For example, the synthetic resin used to form the substrate 13A can be a polyurethane resin. This results in a substrate 13A with high adhesive adaptability. The thickness of the substrate 13A can be, for example, 5 μm or more and 30 μm or less. Even with a small external force applied to the substrate 13A to stretch it, the thin polyurethane resin substrate 13A can be stretched well. Therefore, the substrate 13A can highly follow the shape of the object to be adhered to by the adhesive tape 13 and has high adhesion to the object.

[0109] On the other hand, the substrate 13A, which has high conformability to the shape of the object to be pasted, also has high conformability to the carrier sheet 11 covering the substrate 13A. Therefore, when a force for peeling the carrier sheet 11 from the substrate 13A is applied to the carrier sheet 11, the substrate 13A easily deforms in accordance with the deformation of the carrier sheet 11.

[0110] The tensile elongation at break of substrate 13A can be, for example, 130% or more. The tensile elongation at break can be determined according to JIS K7161-1:2014 (ISO 527-1) "Plastics—Methods for calculation 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 object being tested does not have a yield point, the tensile strain at break can be measured; when it has a yield point, the nominal tensile strain at break can be measured, and the tensile elongation at break can be calculated using these measured values.

[0111] The tensile strength of substrate 13A at 100% elongation can be, for example, less than 4 N / cm. The tensile strength at 100% elongation is the value obtained by dividing the force measured when the strain reaches a specified value (100%) by the width of the test piece, as defined in JIS K 7161-1:2014 (ISO 527-1) "Plastics—Methods for calculating tensile properties—Part 1: General". The tensile strength (T) (N / cm) at 100% elongation can be calculated using the following formula.

[0112] T=F / W

[0113] It should be noted that in the above formula, F is the magnitude of the measured force (N), and W is the width of the test piece (cm).

[0114] It should be noted that the substrate 13A can also be formed from synthetic resins other than polyurethane resins. Examples of synthetic resins other than polyurethane resins include polyvinylidene fluoride resin, ethylene-vinyl acetate copolymer resin, polypropylene resin, and polyethylene terephthalate resin.

[0115] The adhesive layer 13B is formed of a synthetic resin, similar to the substrate 13A. The synthetic resin used to form the adhesive layer 13B can be, for example, a polyurethane resin. The thickness of the adhesive layer 13B can be, for example, 5 μm or more and 25 μm or less.

[0116] At least one of the substrate 13A and the adhesive layer 13B may contain an effective ingredient for the skin. That is, only the substrate 13A may contain an effective ingredient, only the adhesive layer 13B may contain an effective ingredient, or both the substrate 13A and the adhesive layer 13B may contain an effective ingredient. The effective ingredient may be, for example, a cosmetic ingredient, a beauty ingredient, a pharmaceutical ingredient, etc.

[0117] [Example]

[0118] Reference Figure 15 Examples and comparative examples will be described.

[0119] [Example 1]

[0120] Biaxially stretched polypropylene (OPP) sheets (manufactured by Futamura Chemical Co., Ltd., FOR-MP, 40 μm thick) with one matte side on each side were prepared as carrier sheets. Then, an aqueous polyurethane containing ether-based polyols (manufactured by Mitsui Chemicals Co., Ltd., TAKELAC WS-6021) (TAKELAC is a registered trademark) was coated onto the matte side of the OPP film, and a precursor layer was formed by drying the aqueous polyurethane. Next, the precursor layer was aged at room temperature to obtain a substrate with a thickness of 15 μm.

[0121] A release film (manufactured by Toray Advanced Film Co., Ltd., Cerapeel WZ, 75 μm thick) (Cerapeel is a registered trademark) consisting of a polyethylene terephthalate (PET) sheet and a release layer formed of silicone resin was prepared as a release film. Next, a urethane-based adhesive (manufactured by Toyochem Co., Ltd., SP-205) and a curing agent (manufactured by Toyochem Co., Ltd., T-501B) were prepared as the base agent. After adding the curing agent to the base agent, the base agent with the added curing agent was stirred to obtain a coating solution for forming the adhesive layer. By applying the coating solution to the release film and then allowing the coating solution to dry, an adhesive layer with a thickness of 15 μm was obtained.

[0122] Then, by bonding the substrate and adhesive layer together, a laminate consisting of an OPP sheet, adhesive tape, and release film is obtained, stacked in the described order. Next, the laminate is partially cut, with rectangular areas cut out only through the release film and adhesive tape. Then, portions of the release film and adhesive tape, excluding the partially cut areas, are removed from the OPP sheet. This results in a release film and adhesive tape with a length of 50 mm and a width of 10 mm, and an OPP sheet with a length of 50 mm and a width of 20 mm.

[0123] In the OPP sheet, two slits are formed along a 50mm long edge extending along the length direction. These slits extend from a first edge that does not overlap with the adhesive tape along the width direction to a second edge that overlaps with the adhesive tape. This creates two straight slits, each 20mm long. At this point, two slits with a depth of 1 / 4T relative to the thickness T of the OPP sheet are formed, and the distance between the slits in the length direction is set to 4mm. This yields the skin patch of Example 1.

[0124] [Comparative Example 1]

[0125] In Example 1, no seams were formed, and the skin patch cut from the laminate was left to stand for 5 days in an environment of 60°C and 90% relative humidity. Otherwise, the skin patch of Comparative Example 1 was obtained by the same method as in Example 1.

[0126] [Comparative Example 2]

[0127] In Example 1, the depth of the fracture was changed to 1 / 5T, and the laminate after the fracture was formed was left to stand for 5 days in an environment of 60°C and 90% relative humidity. Otherwise, the skin patch of Comparative Example 2 was obtained by the same method as in Example 1.

[0128] [Example 2]

[0129] In Example 1, the laminated body with the fractured seam was left to stand for 5 days in an environment of 60°C and 90% relative humidity. Otherwise, the skin patch of Example 2 was obtained by the same method as in Example 1.

[0130] [Example 3]

[0131] In Example 1, the depth of the fracture was changed to 9 / 10T, and the laminate after the fracture was formed was left to stand for 5 days in an environment of 60°C and 90% relative humidity. Otherwise, the skin patch of Example 3 was obtained by the same method as in Example 1.

[0132] [Example 4]

[0133] In Example 1, concentrated glycerol (manufactured by Kanto Chemical Co., Ltd., 17029-08, quasi-drug raw material specification) at 40% by weight relative to the solid component of the main agent was mixed into the coating liquid forming the adhesive layer. Otherwise, the skin patch of Example 4 was obtained by the same method as in Example 1.

[0134] [Example 5]

[0135] In Example 1, the laminated body with the fractured seam was left to stand for 10 days in an environment of 60°C and 90% relative humidity. Otherwise, the skin patch of Example 5 was obtained by the same method as in Example 1.

[0136] [Comparative Example 3]

[0137] In Example 1, the laminated body with the fractured seam was left to stand for 15 days in an environment of 60°C and 90% relative humidity. Otherwise, the skin patch of Comparative Example 3 was obtained by the same method as in Example 1.

[0138] [Evaluation Method]

[0139] [Tear Strength of Pant Shape]

[0140] The tear strength of the carrier sheet was determined according to the method of JIS K 7128-1 (1998), "Test method for tear strength of plastic films and sheets, Part 1: trouser tear method". Test pieces with a width of 50 mm and a length of 150 mm were prepared from the carrier pieces of each embodiment and comparative example. Next, at one end of the test piece in the length direction, a slit was formed on the test piece, starting from the center in the width direction and extending along the length direction, thereby forming a first piece portion and a second piece portion separated by the slit on the test piece. The length of the slit was set to 75 mm.

[0141] [180° peel strength]

[0142] The peel strength of the substrate relative to the carrier sheet was determined according to the method of JIS Z 0237:2009, "Test Method for Adhesive Tapes and Adhesive Sheets". A universal testing machine (Shimadzu Corporation, Autograph AGS-X, 5kN load sensor) was used for the peel strength determination. Test pieces with a width of 25mm were cut from the skin patches of each example and comparative example. The substrate was then fixed in the universal testing machine, and the strength was calculated when the carrier sheet was peeled 180° relative to the substrate. Then, using the universal testing machine, the first and second pieces were stretched in opposite directions, and the tear strength (N / mm) was measured when the tear depth reached 50mm.

[0143] [Tearing]

[0144] For the skin patches of each embodiment and each comparative example, the carrier sheet is torn from the portion located in the first region of the carrier sheet at each fracture. That is, the skin patches of each embodiment and each comparative example are evaluated in relation to the peeling of the carrier sheet. The tearability is evaluated at this time according to the following criteria. The tearability of the skin patches of each embodiment and each comparative example is evaluated 5 times.

[0145] ○: Starting from the fracture line, the carrier sheet can be torn along its entire width. This allows for smooth peeling of the carrier sheet from the substrate.

[0146] △: Starting from the fracture, it can tear the carrier piece along the entire width, but the resistance when tearing the carrier piece is relatively large.

[0147] [Evaluation Results]

[0148] The evaluation results of trouser tear strength, 180° peel strength, and tear resistance are as follows: Figure 15 As shown.

[0149] like Figure 15 As shown, the trouser tear strength of the carrier sheet in the skin patches of Examples 1 to 5 and Comparative Examples 1 to 3 is 4.3 N / mm.

[0150] It can be seen that the 180° peel strength is 85.1 mN / 25 mm in Example 1, and 592.0 mN / 25 mm in Examples 2, 3, Comparative Example 1, and Comparative Example 2. It can also be seen that the 180° peel strength is 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.

[0151] As can be seen, the tear resistance evaluation was ○ in Examples 1 to 5 and △ in Comparative Examples 1 to 3. Specifically, in Comparative Examples 1 and 2, the depth of each fracture was shallow, therefore external force was required to tear the remaining portion of the carrier sheet, indicating low tear resistance of the carrier sheet. Furthermore, in Comparative Example 3, the adhesion strength between the carrier sheet and the substrate was high, therefore, when an external force was applied to peel the carrier sheet from the substrate, the adhesive tape floated up along with the carrier sheet, indicating low tear resistance of the carrier sheet.

[0152] Furthermore, it can be seen that among Examples 1, 2, and 4, Example 1, with the lowest 180° peel strength, exhibits the least resistance to tearing of the carrier sheet, while Example 4, with the highest 180° peel strength, shows the greatest resistance to tearing of the carrier sheet. Additionally, it can be seen that in Examples 2, 3, Comparative Example 1, and 2, the deeper the fracture, the less resistance the carrier sheet experiences to tearing.

[0153] As described above, according to one embodiment of the skin patch, the following effects can be obtained.

[0154] (1) In the carrier sheet 11 having a thickness of 10 μm to 400 μm, the 180° peel strength is 2 N / 25 mm or less, and the depth of the slit 11A extending from outside the adhesive tape 13 into the adhesive tape 13 is within the range of 1 / 4T to T. Therefore, the carrier sheet 11 can be easily peeled from the substrate 13A starting from the slit 11A.

[0155] (2) In the carrier sheet 11 with a trouser tear strength of 10 N / mm or less, a 180° peel strength of 2 N / mm or less, and a residual thickness TR1 of the carrier sheet 11 extending from the outside of the adhesive tape 13 into the seam 11A within the adhesive tape 13, the thickness TR1 is in the range of 0 to 3 / 4 T. Therefore, the carrier sheet 11 can be easily peeled from the substrate 13A starting from the seam 11A.

[0156] (3) The portion of the seam 11A located on the adhesive tape 13 may not penetrate the carrier sheet 11. In this case, when manufacturing the skin patch 10, it is possible to prevent the substrate from being cut together with the carrier sheet, and it is possible to prevent foreign objects from reaching the substrate through the seam 11A before the skin patch is used.

[0157] (4) When the tear strength of the trousers is less than 10 N / mm, the tear resistance of the carrier sheet 11 can be improved. In addition, when manufacturing the skin patch 10, the substrate 13A and the carrier sheet 11 can be prevented from being cut together, and foreign objects can be prevented from reaching the substrate 13A through the seam 11A before the skin patch 10 is used.

[0158] (5) When the base ends 11A1P and 11A2P of each of the seams 11A1 and 11A2 are facing each other with the adhesive tape 13 in between, the carrier sheet 11 can be peeled off from the substrate 13A from both sides of the adhesive tape 13 along the seams 11A1 and 11A2. Therefore, the carrier sheet 11 can be easily peeled off.

[0159] (6) When the skin patch 10 has a gripping portion 11N defined by the seams 11A1 and 11A2, the user of the skin patch 10 can hold the gripping portion 11N of the carrier sheet 11. Therefore, it is easy to apply an external force to the carrier sheet 11 to peel the carrier sheet 11 from the substrate 13A.

Claims

1. A skin patch comprising a carrier sheet, a release sheet, and an adhesive tape between the carrier sheet and the release sheet, the adhesive tape comprising: a base material which is in contact with the carrier sheet and has a higher tensile elongation at break than the carrier sheet and the release sheet; and an adhesive layer which is in contact with the release sheet and is adhered to the skin after the release sheet is peeled 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 which does not overlap the adhesive tape and a second region which overlaps the adhesive tape, the carrier sheet has a slit which extends from a portion of the outer edge of the carrier sheet included in the first region toward the adhesive tape and beyond the boundary between the first region and the second region, as viewed from a perspective opposite to the plane developed from the carrier sheet, the 180° peel strength between the carrier sheet and the base material according to 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, in the case where the thickness of the carrier sheet is T, the depth Dl of the slit satisfies the following formula: 1 / 4T ≤ Dl ≤ T.

2. A skin patch comprising a carrier sheet, a release sheet, and an adhesive tape between the carrier sheet and the release sheet, the adhesive tape comprising: a base material which is in contact with the carrier sheet and has a higher tensile elongation at break than the carrier sheet and the release sheet; and an adhesive layer which is in contact with the release sheet and is adhered to the skin after the release sheet is peeled 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 which does not overlap the adhesive tape and a second region which overlaps the adhesive tape, the carrier sheet has a slit which extends from a portion of the outer edge of the carrier sheet included in the first region toward the adhesive tape and beyond the boundary between the first region and the second region, as viewed from a perspective opposite to the plane developed from the carrier sheet, the 180° peel strength between the carrier sheet and the base material according to JIS Z 0237:2009 is 2 N / 25 mm or less, in the carrier sheet, the trouser tear strength according to JIS K 7128-1:1998 is 10 N / mm or less, in the case where the thickness of the carrier sheet is T, the residual thickness TRl of the carrier sheet connected to the slit in the thickness direction of the carrier sheet satisfies the following formula: 0 ≤ TRl ≤ 3 / 4T.

3. The skin patch according to claim 1 or 2, wherein in the slit, the depth of the portion of the carrier sheet overlapping the adhesive tape is shallower than the depth of the portion of the carrier sheet not overlapping the adhesive tape.

4. The skin patch according to claim 1, wherein in the slit, the depth of the portion of the carrier sheet overlapping the adhesive tape is shallower than the depth of the portion of the carrier sheet not overlapping the adhesive tape. The pant-like tear strength according to JIS K 7128-1:1998 is 10 N / mm or less.

5. The skin patch according to claim 1, wherein the slits are first slits, the carrier sheet further has second slits that, from a perspective opposite to a plane in which the carrier sheet is developed, extend from a portion of the outer edge of the carrier sheet included in the first region toward the adhesive tape and beyond a boundary between the first region and the second region, in a case where the thickness of the carrier sheet is T, a depth D2 of the second slits satisfies the following formula: 1 / 4T ≤ D2 ≤ T, of the slits are located at base ends of the outer edge of the carrier sheet opposite to each other across the adhesive tape.

6. The skin patch according to claim 1, wherein the slits are first slits, the carrier sheet further has second slits that, from a perspective opposite to a plane in which the carrier sheet is developed, extend from a portion of the outer edge of the carrier sheet included in the first region toward the adhesive tape and beyond a boundary between the first region and the second region, in a case where the thickness of the carrier sheet is T, a depth D2 of the second slits satisfies the following formula: 1 / 4T ≤ D2 ≤ T, the first slits and the second slits are arranged at intervals along a first direction from a perspective opposite to a plane in which the carrier sheet is developed, and each of the slits extends along a second direction intersecting the first direction, the carrier sheet has a pinch portion sandwiched by the first slits and the second slits and extending along the second direction.

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