JPWO2019181349A1 - Sheet for skin application - Google Patents

Abstract

According to one aspect of the present invention, a patch 2 having a base material layer 5 and an adhesive material layer 6 laminated on the back surface side of the base material layer 5, and a release paper provided so as to cover the adhesive material layer 6. 3, the protective film 4 provided to cover the front surface side of the base material layer 5, and the patch 2 are divided into a main body portion 8 that is attached to the skin Sk during use and a removal portion 9 that is removed during use. The patch 2 includes a first slit 7 and a second slit 11 that divides the release paper 3 into a peeling portion 12 that is peeled off during use and a gripping portion 13 that is gripped by a user during use. 8 is provided so that the cross-sectional area S decreases from the vicinity of the first slit 7 to the vicinity of the first slit 7, and the cross-sectional area S increases from the vicinity of the first slit 7 toward the removal portion 9. It

Description

The present invention relates to a skin patch sheet for sticking to the skin.
The present application claims priority based on Japanese Patent Application No. 2018-056476 filed in Japan on March 23, 2018, the contents of which are incorporated herein by reference.

BACKGROUND ART Conventionally, a skin patch sheet that is stuck to the skin for medical or cosmetic purposes has been widely used. This skin patch sheet includes a patch to be applied to the skin and a release paper that covers the adhesive layer of the patch.

By the way, recently, there is an increasing demand for a skin patch sheet for sticking to a site such as a face that is easily visible to the human eye. In the case of such a skin patch sheet, the patch is formed into a thin film so as to make it hard to be noticed by the eyes. Therefore, in order to prevent the patch from being deformed or damaged during storage before use, the surface of the patch is covered with a rigid protective film on the surface of the patch, that is, the surface opposite to the release paper. Stored in the state. In such a skin patch sheet, when the user's finger touches the patch when separating the release paper and the protective film from the patch during use, wrinkles are likely to occur in the thin patch. Therefore, Patent Document 1 proposes a skin patch sheet capable of separating the release paper and the protective film from the patch without touching the patch.

On the other hand, Patent Document 2 discloses a skin patch sheet that can be stuck to the skin by a small number of procedures. As shown in FIG. 10( b ), this skin patch sheet 80 includes a patch 83 comprising a base material layer 81 and an adhesive material layer 82, a protective film 84 covering the surface of the base material layer 81, and an adhesive material layer. And a release paper 85 for covering 82. In addition, as shown in FIGS. 10A and 10B, this skin patch sheet has a main body portion formed by slits 86 formed so as to penetrate the release paper 85 and the patch 83 to reach the protective film 84. It is divided into 87 and a removing section 88. Then, when using the skin sticking sheet 80, first, the main body 87 of the release paper 85 is peeled off, and the exposed main body 87 of the adhesive layer 82 is stuck to the skin. Thereafter, the protective film 84 is removed together with the removed portion 88 of the release paper 85 and the removed portion 88 of the patch 83, so that only the main body 87 of the patch 83 remains on the skin. In this way, the skin patch sheet 80 of Patent Document 2 can be stuck to the skin by a small number of steps.

Japanese Patent Laid-Open No. 2016-140717 Japanese Patent No. 5384730

However, as a result of a test, in the skin patch sheet of Patent Document 1, the procedure for separating the release paper and the protective film from the patch is many and complicated, so that the instructions describing the procedure must be referred to. , It has been found that it is difficult to surely attach the skin patch sheet to the skin.

In addition, when a sample was prepared and tested, in the skin patch sheet 80 of Patent Document 2, when the protective film 84 was removed together with the removal part 88 of the release paper 85 and the removal part 88 of the patch 83, the patch 83 It was found that the main body portion 87 and the removing portion 88 cannot be smoothly separated. Then, when the cause was examined, it was found that the main body portion 87 and the removed portion 88 of the adhesive material layer 82 adhered to each other.

Therefore, the present invention was devised in view of such circumstances, and its purpose is to be able to be simply and reliably applied to the skin with a small number of steps, and at the time of removing the protective film, the main body portion and the removal portion of the patch are removed. An object is to provide a skin patch sheet that can be smoothly separated.

The sheet for skin patch according to one aspect of the present invention,
A skin patch sheet for sticking to the skin,
A thin film-shaped base material layer, and an adhesive patch having an adhesive material layer laminated on the back surface side of the base material layer,
Release paper provided covering the adhesive layer of the patch,
A protective film provided covering the surface side of the base material layer of the patch,
A first slit that is formed over the entire length in the thickness direction of the patch and divides the patch into a main body part that is attached to the skin during use and a removal part that is removed during use,
A second slit that is formed over the entire length in the thickness direction of the release paper and divides the release paper into a peeling portion that is peeled off during use and a gripping portion that a user grips during use.
Equipped with
The patch is formed such that the cross-sectional area decreases from the main body portion toward the first slit, and the cross-sectional area increases from the first slit toward the removal portion.

In the skin patch sheet according to one aspect of the present invention, the protective film may have the same shape as the patch in plan view.

Further, in the skin patch sheet according to one aspect of the present invention, in plan view, an angle formed by the outline of the main body and the outline of the removal unit with the first slit interposed therebetween is an acute angle. May be

Further, in the skin patch sheet according to one aspect of the present invention, the main body portion may have any one of a circular shape, an elliptical shape, a polygonal shape, a fan shape, and a boomerang shape in a plan view.

Further, in the skin patch sheet according to one aspect of the present invention, the removal portion may have any one of a circular shape, an elliptical shape, a polygonal shape, a fan shape, and a boomerang shape in a plan view.

Also, in the skin patch sheet according to one aspect of the present invention, the patch has a circular outer shape in which the removed portion is in a plan view, and the width in a direction along the first slit in a plan view. The dimension may be 0.4 times or less the diameter of the removed portion at the position of the first slit.

Further, in the skin patch sheet according to one aspect of the present invention, the patch is formed such that a width dimension in a direction along the first slit in a plan view is 2 mm or less at a position of the first slit. May be done.

Further, in the skin patch sheet according to one aspect of the present invention, the base material layer may have a thickness of 5 μm or more and 50 μm or less, and the adhesive layer may have a thickness of 15 μm or more and 60 μm or less.

Further, in the skin patch sheet according to one aspect of the present invention, the protective film has a peel force of 0.028 N/20 mm or more and 0.064 N/20 mm or less with respect to the base material layer, and the pressure-sensitive adhesive layer is The adhesive strength to the stainless steel plate may be 1.263 N/20 mm or more and 2.947 N/20 mm or less.

In the skin patch sheet according to one aspect of the present invention, the protective film has a base part that covers the main body part of the patch and a projection part that covers the removal part, and the skin patch sheet. Is formed over the entire length in the thickness direction of the protective film, a third slit extending from a predetermined position near the end of the first slit to a predetermined position inside the base in an outer edge of the base in a plan view. It may be further provided.

In the skin patch sheet according to one aspect of the present invention, the third slit may extend in a direction forming an acute angle with the first slit in a plan view.

In the skin patch sheet according to one aspect of the present invention, the third slit may have a curved shape that is convex toward the first slit side in a plan view.

Further, in the skin patch sheet according to an aspect of the present invention, the protective film is a pair of the third extending from the vicinity of each of the both ends of the first slit in plan view is an outer edge of the base portion. It may have a slit.

According to the skin patch sheet according to one aspect of the present invention, it can be applied to the skin in a small number of steps, and when removing the protective film, the main body part and the removal part of the patch are smoothly separated. be able to.

It is a schematic plan view which shows the structure of the skin patch sheet 1 which concerns on 1st embodiment of this invention. It is a schematic sectional drawing which shows the AA cross section in FIG. It is a schematic disassembled perspective view which shows the structure of the sheet 1 for skin attachment. It is explanatory drawing which shows the usage procedure of the skin patch sheet 1 which concerns on 1st embodiment of this invention. It is a schematic plan view which shows the sheets 20, 30, 40, 50 for skin sticking which concern on the modification of 1st embodiment of this invention. It is a schematic plan view which shows the structure of the sheet 60 for skin sticking which concerns on 2nd embodiment of this invention. It is a schematic sectional drawing which shows the BB cross section in FIG. It is a schematic perspective view for demonstrating the usage method of the skin patch sheet 60 which concerns on 2nd embodiment of this invention. It is a schematic plan view which shows the skin patch sheets 70, 90, 100, 110 which concern on the modification of 2nd embodiment of this invention. It is a schematic sectional drawing which shows the structure of the skin patch sheet 80 which concerns on a prior art example, (a) is a schematic plan view, (b) is a sectional view on the AA line in (a).

Hereinafter, a skin patch sheet according to an embodiment of the present invention will be described with reference to the drawings. The skin patch sheet of the present invention can be used for medical purposes, cosmetic purposes, and the like.

(Structure of the skin patch sheet according to the first embodiment)
1 to 3 are views showing a configuration of a skin patch sheet 1 according to a first embodiment of the present invention, FIG. 1 is a schematic plan view, and FIG. 2 is a sectional view taken along line AA in FIG. 3 is a schematic exploded perspective view. As shown in FIG. 2 and FIG. 3, the skin patch sheet 1 includes a thin film patch 2 having a gourd-shaped outer shape in plan view, and a release paper 3 provided on the back surface of the patch 2 to cover it. , And a protective film 4 provided so as to cover the front surface side of the patch 2.

(Patch)
The patch 2 plays a role of protecting the skin surface from the external environment by being stuck to the skin or blinding the skin surface so that it cannot be seen from the outside. As shown in FIGS. 2 and 3, this patch 2 has a thin film base material layer 5 and an adhesive material layer 6 laminated on the back surface side of the base material layer 5. Then, as shown in FIG. 2, the patch 2 extends over the entire length in the thickness direction, and as shown in FIG. Are formed. Thereby, the base material layer 5 and the adhesive material layer 6 are each divided into two parts by the first slit 7 into a main body part 8 to be attached to the skin during use and a removal part 9 to be removed during use. However, the adhesive material layer 6 is in a state where the side portion of the main body portion 8 and the side portion of the removing portion 9 are adhered to each other at the position of the first slit 7.

As shown in FIG. 3, the patch 2 configured in this way has a smaller cross-sectional area S from the main body 8 toward the vicinity of the first slit 7, and also from the vicinity of the first slit 7 toward the removing portion 9. The cross-sectional area S is formed to be large. That is, the cross-sectional area S1 of the patch 2 near the first slit 7 is smaller than the cross-sectional area S2 of the patch 2 at a predetermined position of the main body portion 8 and the cross-sectional area S3 of the patch 2 at a predetermined position of the removing section 9. It is getting smaller. In other words, the patch 2 is formed such that the vicinity of the first slit 7 is narrower in the width direction than other portions in plan view as shown in FIGS. The portion has a constricted portion 10. In the constricted portion 10, the constriction angle α formed by the outer shape line of the main body portion 8 and the outer shape line of the removal portion 9 in plan view is an acute angle, that is, 90° or less.

In the first embodiment, the width dimension W of the patch 2 near the first slit 7 is set to approximately 2 mm in plan view. Further, in the patch 2, the body portion 8 is formed in a circular shape having a diameter D1 of approximately 15 mm and the removal portion 9 is formed in a circular shape having a diameter D2 of approximately 5 mm in plan view. Therefore, the width dimension W of the patch 2 at the position of the first slit 7 is approximately 0.13 times the diameter D1 of the main body portion 8 and approximately 0.4 times the diameter D2 of the removal portion 9. It is sized. The total thickness of the patch 2 including the base material layer 5 and the adhesive layer 6 is set to about 27 μm.

The base material layer 5 plays a role of holding the adhesive material layer 6. The base material layer 5 is a thin film member made of polyurethane and having a substantially constant thickness. In the first embodiment, the thickness of the base material layer 5 is set to about 7 μm. As a material for forming the base material layer 5, for example, biaxially oriented polypropylene (so-called OPP), polyethylene terephthalate (so-called PET), or polyethylene (so-called PE) can be used instead of polyurethane.

The adhesive layer 6 plays a role of attaching the patch 2 to the skin. The pressure-sensitive adhesive layer 6 is made of an acrylic resin adhesive and is laminated on the back surface side of the base material layer 5 with a substantially constant thickness, as shown in FIG. Further, as shown in FIG. 3, the adhesive material layer 6 is formed in a shape that is substantially the same as the base material layer 5 in a plan view. As a material for forming the pressure-sensitive adhesive layer 6, a conventionally known adhesive such as a urethane resin-based adhesive, a silicone-based adhesive, or a rubber-based adhesive can be used instead of the acrylic adhesive.

In the first embodiment, the thickness of the adhesive material layer 6 is set to about 20 μm. Further, the adhesive material layer 6 has an adhesive force to the stainless steel plate within a range of 1.263 N/20 mm or more and 2.947 N/20 mm or less in the case of the patch 2 having a width dimension of 20 mm. In the specification of the present application, the adhesive force of the adhesive layer 6 to the skin is defined by the adhesive force to a stainless plate (not shown). This is because human skin has a wide variety of states due to differences in age, sex, constitution, etc., and there is a large variation in the measured values of adhesive strength, so the adhesive strength to a stainless steel plate with a uniform surface state This is because it was prescribed.

(Release paper)
The release paper 3 plays a role of preventing the adhesive force of the adhesive layer 6 from being reduced due to the adhesive layer 6 being exposed to the outside. Although not shown in detail in the drawing, the release paper 3 is a laminated paper whose one surface is peeled. The release paper 3 extends over the entire length in the thickness direction as shown in FIG. 2 and extends over the entire width in the width direction in plan view as shown in FIG. Are formed. As shown in FIGS. 2 and 3, the second slit 11 is located at a position overlapping the first slit 7 in a plan view, that is, vertically below the first slit 7, and is the same as the first slit 7 in a side view. It is located on the line. The second slit 11 divides the release paper 3 into a peeling portion 12 that is peeled off during use and a gripping portion 13 that is gripped by the user during use. Here, as shown in FIGS. 1 and 3, the peeling portion 12 is formed in a rectangular shape larger than the main body portion 8 of the patch 2 in a plan view. On the other hand, the grip portion 13 is formed in a circular shape having substantially the same size as the removal portion 9 of the patch 2 in plan view.

As shown in FIGS. 1 and 3, the release paper 3 thus configured is attached to the back surface of the patch 2 so that the release-treated surface covers the adhesive layer 6, and the patch 2 is seen in a plan view. 2 extends outward from the outer shape. As the release paper 3, a conventionally known release paper such as a release-treated polyester film or polyolefin film can be used instead of the release-treated laminated paper.

(Protective film)
The protective film 4 plays a role of protecting the patch 2 from deformation or damage during storage of the skin patch sheet 1. Although not shown in detail in the drawing, the protective film 4 is formed by joining a PET film and an OPP film. As shown in FIGS. 1 and 3, the protective film 4 has a gourd-shaped outer shape that is substantially equal to that of the patch 2 in plan view, and is formed to be considerably thicker than the patch 2 as shown in FIG. As shown in FIG. 3, the protective film 4 thus configured is attached to the surface of the patch 2 so as to cover the base material layer 5. Here, the peeling force of the protective film 4 to the base material layer 5 is set to be larger than the adhesive force of the adhesive material layer 6 to the release paper 3 and smaller than the adhesive force of the adhesive material layer 6 to the skin.

In the first embodiment, the thickness of the protective film 4 is set to about 115 μm. Further, the peeling force of the protective film 4 from the base material layer 5 is set in the range of 0.028 N/20 mm or more and 0.064 N/20 mm or less in the case of the protective film 4 having a width dimension of 20 mm. In the case of the protective film 4 having a small width dimension, the peeling force is very small and it is difficult to measure. Therefore, the peeling force of the protective film 4 having a width of 50 mm was measured with respect to the base material layer 5, and the measurement result was converted to obtain the peeling force of the protective film 4 having a width of 20 mm.

(How to use the skin patch sheet according to the first embodiment)
Next, a method of using the skin patch sheet 1 according to the first embodiment and its function and effect will be described. FIG. 4 is an explanatory view showing a procedure for using the skin patch sheet 1. First, the user of the skin patch sheet 1 peels the peeling section 12 of the release paper 3 from the skin patch sheet 1. That is, although not shown in detail in the drawing, the user holds the part of the release paper 3 extending outward from the patch 2 with one hand while holding the gripping part 13 of the release paper 3 and the removing part of the patch 2. The part in which 9 and the protective film 4 are laminated (referred to as "grip part 14") is gripped by the other hand. At this time, since the removing portion 9 of the adhesive material layer 6 is covered by the grip portion 13 of the release paper 3, the user's fingertip does not touch the adhesive material layer 6 and become dirty.

Then, as shown in FIG. 4A, the user raises the grip portion 14 or the like upward. Here, as described above, the peeling force of the protective film 4 with respect to the base material layer 5 is set to be larger than the adhesive force of the adhesive material layer 6 with respect to the release paper 3. Therefore, when the gripping portion 14 or the like is raised upward, the protective film 4 does not peel from the patch 2 and the patch 2 peels from the release paper 3. Further, as described above, the adhesive material layer 6 of the patch 2 is in a state where the side portion of the main body portion 8 and the side portion of the removal portion 9 are attached to each other at the position of the first slit 7. Therefore, when the user raises the gripping portion 14 or the like upward, the main body portion 8 of the patch 2 does not separate from the removing portion 9 and fall onto the peeling portion 12 of the release paper 3.

Next, the user sticks the skin patch sheet 1 with the peeling part 12 of the release paper 3 peeled off onto the skin. That is, as shown in FIG. 4B, the user holds the gripping portion 14 or the like and removes the main body portion 8 of the adhesive material layer 6 exposed to the outside by peeling off the peeling portion 12 of the release paper 3. , Affixed to a predetermined location on the skin Sk. At this time, the removed portion 9 of the adhesive material layer 6 is covered with the grip portion 13 of the release paper 3 and therefore does not adhere to the skin Sk. The user pays attention to the fact that the part of the main body portion 8 of the adhesive layer 6 that is particularly close to the removed portion 9 surely adheres to the skin Sk. At this point, the adhesive material layer 6 remains in a state where the side portion of the main body portion 8 and the side portion of the removal portion 9 are attached to each other at the position of the first slit 7.

Here, in the first embodiment, the thickness of the base material layer 5 is set to approximately 7 μm. Therefore, sufficient tensile strength is ensured in the base material layer 5, and there is an advantage that the base material layer 5 is unlikely to be deformed or damaged when or after the skin application sheet 1 is applied to the skin Sk. .. In order to secure sufficient tensile strength to the base material layer 5 as described above, it is preferable that the thickness of the base material layer 5 is set to 5 μm or more.

Next, the user removes the protective film 4 and the like from the skin patch sheet 1. That is, the user grips the gripping portion 14 again, and raises the gripping portion 14 upward with the vicinity of the constricted portion 10 as a fulcrum, as shown in FIG. 4C. Then, the adhesive material layer 6 is separated from the main body portion 8 by the removing portion 9 at the position of the first slit 7. As a result, the gripping part 13 of the release paper 3, the removing part 9 of the patch 2 and the protective film 4 are separated from the main body part 8 of the patch 2 in an integrated state. Even at this time, since the removed portion 9 of the adhesive layer 6 is covered by the gripping portion 13 of the release paper 3, the user's fingertip does not touch the adhesive layer 6 and become dirty.

Here, the patch 2 is formed such that the cross-sectional area S decreases from the main body portion 8 toward the vicinity of the first slit 7, and the cross-sectional area S increases from the vicinity of the first slit 7 toward the removal portion 9. ing. As described above, since the patch 2 has the constricted portion 10 provided near the first slit 7, as compared with the case where the constricted portion 10 is not provided, the main body portion 8 and the removed portion 9 of the adhesive layer 6 are provided. The area where and stick to each other is narrow. Therefore, the removal portion 9 of the adhesive material layer 6 is smoothly separated from the main body portion 8 by only applying a slight force to the grip portion 14 or the like. Further, since the patch 2 is provided with the constricted portion 10, when an upward force is applied to the gripping portion 14 or the like, stress concentration occurs near the constricted portion 10 of the patch 2. Therefore, the removal portion 9 of the adhesive material layer 6 is separated from the main body portion 8 more smoothly by applying a slight force to the gripping portion or the like 14. Further, in the constricted portion 10, the outer shape line of the main body portion 8 and the outer shape line of the removing portion 9 form an acute angle across the first slit 7, and therefore the outer shape line of the main body portion 8 and the outer shape of the removing portion 9 are formed. As compared with the case where the line forms an obtuse angle, stress concentration is more likely to occur in the constricted portion 10. Therefore, the removal portion 9 of the adhesive material layer 6 is more smoothly separated from the main body portion 8 by applying a slight force to the grip portion 14 or the like.

In the first embodiment, the width dimension W of the adhesive patch 2 in the vicinity of the first slit 7 in plan view is about 0.4 times the diameter D2 of the removed portion 9, and is set to about 2 mm. .. Therefore, stress is likely to be generated in the vicinity of the constricted portion 10, and the removed portion 9 of the adhesive material layer 6 is smoothly separated from the main body portion 8. In order to easily generate stress concentration as described above, the width dimension W of the adhesive patch 2 near the first slit 7 is 0. It is preferably set to 4 times or less, and set to 2 mm or less regardless of the plan view shape of the removing portion 9.

Further, as described above, the peeling force of the protective film 4 with respect to the base material layer 5 is set to be smaller than the adhesive force of the adhesive material layer 6 with respect to the skin Sk. Therefore, when the gripping part 14 or the like is raised upward, the patch 2 does not peel from the skin Sk, but the protective film 4 peels from the patch 2.

Then, when the protective film 4 and the like are completely removed from the skin patch sheet 1, only the main body portion 8 of the patch 2 remains on the skin Sk as shown in FIG. 4(d). This completes the operation of applying the skin application sheet 1 to the skin Sk.

Here, in the first embodiment, the thickness of the base material layer 5 is set to approximately 7 μm. Therefore, since the appropriate moisture permeability is ensured in the base material layer 5, there is an advantage that a rash hardly occurs in the region of the skin Sk covered with the patch 2. In order to secure appropriate moisture permeability, it is preferable that the thickness of the base material layer 5 is set to 50 μm or less.

Moreover, in the first embodiment, the thickness of the adhesive layer 6 is set to about 20 μm. Therefore, a sufficient adhesive force is secured in the adhesive layer 6, which has the advantage that the patch 2 is unlikely to peel off from the skin Sk. In addition, since appropriate moisture permeability is secured in the pressure-sensitive adhesive layer 6, there is also an advantage that a rash is unlikely to occur in the area of the skin Sk covered with the patch 2. In addition, in order to secure a sufficient adhesive force and a proper moisture permeability as described above, it is preferable that the thickness of the adhesive layer 6 is set to 15 μm or more and 60 μm or less.

Further, in the first embodiment, the total thickness of the patch 2 including the base material layer 5 and the adhesive material layer 6 is set to about 27 μm. Therefore, when the patch 2 is peeled off from the skin Sk after use, there is an advantage that the patch 2 is easily peeled off because the fingertips are easily caught on the side part of the patch 2. In addition, since it does not significantly project from the surface of the skin Sk when it is applied to the skin Sk, there is an advantage that the patch 2 is less noticeable to the public. In addition, in order to secure the ease of peeling after use and make it hard to be noticed during use, it is preferable that the thickness of the patch 2 is set to 20 μm or more and 110 μm or less.

As described above, according to the skin patch sheet 1 of the first embodiment, when the peeling part 12 of the release paper 3 is peeled from the skin patch sheet 1, the main body part 8 of the patch 2 is removed. When removing the protective film 4 or the like from the skin patch sheet 1 attached to the skin Sk by peeling it off from the release paper 3 without separating it from 9, the removal part 9 of the patch 2 is smoothly removed from the main body part 8. It is possible to achieve a good balance of separation.

(Modification of the first embodiment)
In the patch 2 of the first embodiment, the main body portion 8 is formed in a circular shape in plan view, and the removal portion 9 is also formed in a circular shape in plan view. However, if the patch 2 has a constricted portion 10 in the lengthwise intermediate portion, the plan view shapes of the main body portion 8 and the removal portion 9 can be appropriately changed in design, and each of them can have, for example, an elliptical shape or a multi-shaped shape. It may be prismatic, fan-shaped, and boomerang-shaped. FIG. 5 is a schematic plan view showing a skin patch sheet 20, 30, 40, 50 according to a modification of the present invention. In the skin patch sheet 20 shown in FIG. 5A, the main body 21 and the removal part 22 are both formed in an elliptical shape in a plan view. In the skin patch sheet 30 shown in FIG. 5B, the main body portion 31 is formed in a substantially rectangular shape in a plan view, and the removal portion 32 is formed in a pentagonal shape in a plan view. In the skin patch sheet 40 shown in FIG. 5C, the main body portion 41 is formed in a substantially triangular shape in a plan view, and the removal portion 42 is formed in a fan shape in a plan view. In the skin patch sheet 50 shown in FIG. 5D, the main body portion 51 is formed in a hexagonal shape in a plan view, and the removal portion 52 is formed in a boomerang shape in a plan view.

The patch 2 of the first embodiment has a two-layer structure composed of a base material layer 5 and an adhesive material layer 6, but the patch 2 according to the present invention comprises, for example, a base material layer 5 and an adhesive material layer 6. It may have a structure of three or more layers with another layer (not shown) interposed therebetween. Further, the patch 2 of the first embodiment has a configuration including the main body portion 8 and the removing portion 9 with the first slit 7 interposed therebetween, but the patch 2 according to the present invention has the main body portion 8 and the removing portion 9. It may be configured to include other parts other than the above.

The pressure-sensitive adhesive layer 6 of the first embodiment has the same shape as the base material layer 5 in a plan view, but the plan-view shape can be appropriately changed in design as long as a sufficient adhesive force can be secured. For example, the adhesive material layer 6 may be laminated only on a partial region of the base material layer 5.

The first slit 7 of the first embodiment is located on the constricted portion 10 on the same straight line as the second slit 11 in a side view, but the position may be slightly deviated from the constricted portion 10 in the horizontal direction. .. However, when the first slit 7 is located in the constricted portion 10, there is an advantage that the removed portion 9 of the adhesive material layer 6 is easily separated from the main body portion 8 due to the influence of stress concentration generated in the constricted portion 10. ..

Although the release paper 3 of the first embodiment is configured to include the peeling section 12 and the gripping section 13 with the second slit 11 interposed therebetween, the release paper 3 according to the present invention is different from the peeling section 12 and the gripping section 13. It may be configured to include other parts. Further, in the release paper 3 of the first embodiment, the peeling portion 12 is formed to be larger than the main body portion 8 of the patch 2 in plan view, but the peeling portion 12 is formed as the main body portion 8 of the patch 2 in plan view. It may have the same shape. However, the shape of the peeling portion 12 as in the first embodiment has an advantage that the peeling portion 12 can be easily peeled from the main body portion 8 of the patch 2.

The protective film 4 of the first embodiment has the same shape as the patch 2 in a plan view, but the plan view shape can be appropriately changed in design as long as the patch 2 can be protected. The design of the thickness of the protective film 4 can be changed as appropriate.

(Structure of the skin patch sheet according to the second embodiment)
6 and 7 are views showing the configuration of the skin patch sheet 60 according to the second embodiment of the present invention, FIG. 6 is a schematic plan view, and FIG. 7 is a sectional view taken along line BB in FIG. .. Compared to the skin patch sheet 1 according to the first embodiment, the skin patch sheet 60 has a protective film 61 that is different from the protective film 4 of the first embodiment. Other than that, the skin patch sheet 60 is the same as the skin patch sheet 1, and therefore, the same reference numerals as in the first embodiment are used for each part, and the description thereof is omitted. Further, the various modifications described in the first embodiment can also be applied to the skin patch sheet 60 according to the second embodiment.

The protective film 61 is different from the protective film 4 of the first embodiment only in that it has a third slit 62. As shown in FIGS. 6 and 7, the protective film 61 includes a base 63 that covers the main body 8 of the patch 2 in a plan view and a protrusion 64 that covers the removed portion 9 of the patch 2 in a plan view. Have A constricted portion 65 is formed between the base portion 63 and the protruding portion 64 so as to be narrower in the width direction than other portions. That is, although not shown in detail in the drawing, the protective film 61 is formed such that the cross-sectional area decreases from the base 63 toward the constricted portion 65 and increases from the constricted portion 65 toward the protruding portion 64. ing.

The third slit 62 plays a role of facilitating peeling of the protective film 61 from the patch 2 when removing the protective film 61 and the like from the skin patch sheet 60 attached to the skin Sk. More specifically, in the skin patch sheet 1 according to the first embodiment, when the gripping part 14 is raised upward as shown in FIG. Although it separates smoothly, the protective film 4 may not be peeled off well from the patch 2. In this case, as shown in FIG. 4( d ), there is a problem that the main body 8 of the patch 2 does not remain on the skin Sk and the main body 8 of the patch 2 is lifted upward together with the grips 14 and the like. Occurs. In order to prevent such a problem from occurring, a third slit 62 is formed in the protective film 61 of the second embodiment.

As shown in FIG. 6, the third slit 62 has an arc shape that is convex toward the side of the first slit 7 (shown by the broken line in FIG. 6) of the patch 2 in a plan view, more specifically, the base 63. Is formed so as to form a part of an arc having a diameter D1 equal to. The starting point 621 of the third slit 62 is the outer edge 631 of the base 63, and is set at a predetermined position near the end of the first slit 7 in plan view. More specifically, the starting point 621 is set near the lower end of the first slit 7 in FIG. The third slit 62 extends obliquely in a direction forming an acute angle with the first slit 7 in plan view, more specifically, toward the upper left direction in FIG. Further, the end point 622 of the third slit 62 is set at a predetermined position inside the base portion 63, more specifically, at the central portion in the longitudinal direction of the base portion 63. Here, “inside the base portion 63 ”means the inside of the base portion 63 that does not include the outer edge. That is, the base 63 is not divided by the third slit 62. The third slit 62 is formed over the entire length in the thickness direction of the protective film 61, as shown in FIG. 7.

(How to use the skin patch sheet according to the second embodiment)
Next, a method of using the skin patch sheet 60 according to the second embodiment and its function and effect will be described. FIG. 8 is a schematic perspective view for explaining a method of using the skin patch sheet 60. The user of the skin patch sheet 60 first peels off the peeling section 12 of the release paper 3 from the skin patch sheet 60, similarly to the skin patch sheet 1 according to the first embodiment (FIG. 4(a)). (See FIG. 4), and the skin sticking sheet 60 is stuck to the skin Sk (see FIG. 4B). At this time, the third slit 62 is formed in the protective film 61, but as described above, the adhesive layer 6 of the adhesive patch 2 adheres to the side portion of the main body portion 8 and the side portion of the removal portion 9 to each other. Therefore, the third slit 62 does not hinder the work.

Next, the user removes the protective film 61 and the like from the skin patch sheet 60, similarly to the skin patch sheet 1 according to the first embodiment (see FIG. 4(c)). At this time, for example, the right-handed user presses the area AL on the left side of the third slit 62 in the base 63 of the protective film 61 with the left hand (not shown) from above as shown in FIG. The protrusion 64 or the like is grasped by the (illustrated) and raised upward. As a result, the area AL on the left side of the third slit 62 in the base 63 remains attached to the main body 8 of the adhesive patch 2, and only the area AR on the right side of the third slit 62 peels from the main body 8 of the adhesive patch 2. After that, the user separates the left hand from the protective film 61 and peels the area AL on the left side of the third slit 62 in the base 63 from the main body 8 of the patch 2.

As described above, since the protective film 61 is not divided by the third slit 62, first, only a part of the protective film 61 can be peeled off from the patch 2, and the rest can be peeled off from the patch 2. This prevents the entire patch 2 from being lifted together with the protective film 61, and allows the patch 2 to remain on the skin Sk.

Also, when a right-handed user grips the protrusion 64 of the protective film 61 or the like and raises it upward, the operation is the operation of rotating the forearm of the right hand from the inside of the body to the outside with the elbow as a fulcrum. Become. Then, the third slit 62 extends in a direction forming an acute angle with the first slit 7 in a plan view along the path of the right hand at this time. Therefore, the user can smoothly perform the operation of causing the protrusion 64 and the like to move upward.

Furthermore, since the third slit 62 has an arcuate shape that is convex toward the first slit 7 side in a plan view, a comparison with a case where the third slit 62 has a linear shape in a plan view is shown in FIG. The area AL on the left side of the third slit 62 in 6, that is, the area AL pressed by the left hand is widely secured. Therefore, with the wide area AL of the protective film 61 attached to the main body portion 8 of the patch 2, the remaining narrow area AR of the protective film 61 can be peeled off from the main body portion 8 of the adhesive patch 2. Thereby, it is possible to more reliably prevent the entire patch 2 from being lifted together with the protective film 61.

(Modification of Second Embodiment)
In the second embodiment, the third slit 62 is formed so as to form a part of an arc having the same diameter as the base 63 in a plan view. However, the diameter of the arc formed by the third slit 62 can be set to any size. The shape of the third slit 62 in plan view is not limited to an arc shape, and may be an arbitrary curved shape, a linear shape, a branched shape, or the like.

In the second embodiment, the starting point 621 of the third slit 62 is the outer edge 631 of the base 63 and is set at a predetermined position near the end of the first slit 7 in plan view. Here, FIG. 9 is a schematic plan view showing the skin patch sheets 70, 90, 100, 110 according to the modification of the second embodiment of the present invention. As in the skin patch sheet 70 shown in FIG. 9A, the starting point 711 of the third slit 71 can be set at a position slightly separated from the first slit 7 at the outer edge 721 of the base 72. However, setting the starting point 711 at a position closer to the first slit 7 has an advantage that the operation of gripping the protrusion 73 and the like with the right hand and pulling it upward can be performed more smoothly.

In the second embodiment, the end point 622 of the third slit 62 is set at the center of the base 63 in the length direction. However, the setting position of the end point 622 is not limited to this. For example, as in the skin patch sheet 90 shown in FIG. 9B, the end point 622 is located at the outer edge 911 of the base portion 91 and near the facing position of the start point 921 of the third slit 92. It is also possible to set the end point 922. However, when the distance between the start point 921 and the end point 922 is appropriately shortened, the patch 2 lifted together with the protrusion 93 (see FIG. 7) when gripping the protrusion 93 and the like with the right hand and pulling it upward. Has a merit that it is difficult to cause fluttering and that the patch 2 is less likely to wrinkle.

In the second embodiment, only one third slit 62 is formed on the base 63 of the protective film 61. However, the number of the third slits 62 can be appropriately changed, and, for example, as in the skin sticking sheet 100 shown in FIG. 9C, from the outer edges 101 near the left and right ends of the first slit 7, respectively. The pair of third slits 102 can be formed so as to extend in the direction orthogonal to the first slit 7. In addition, as in the skin-adhesive sheet 110 shown in FIG. 9D, a pair of outer edges 111 near the left and right ends of the first slit 7 extends in an obtuse angle with the first slit 7 in a pair. It is also possible to form each of the third slits 112. According to such skin patch sheets 100 and 110, regardless of whether the user is a right-handed person or a left-handed person, it is possible to smoothly perform the operation of gripping the protruding portions 103, 113 with the dominant hand and pulling them upward. The advantage is that

The “skin” according to the present invention is a concept including not only human skin but also animal skin. Therefore, the skin patch sheet according to the present invention can also be used for medical treatment of pets and decoration of pets.

1 Sheet for Skin Adhesive 2 Patch 3 Release Paper 4 Protective Film 5 Base Layer 6 Adhesive Layer 7 First Slit 8 Main Body 9 Removal Part 11 Second Slit 12 Peeling Part 13 Gripping Part 62 Third Slit D2 Diameter (Removal) Part 9)
S Cross-sectional area Sk Skin W width dimension (patch 2)
α Constriction angle

Claims (13)

A skin patch sheet for sticking to the skin,
A thin film-shaped base material layer, and an adhesive patch having an adhesive material layer laminated on the back surface side of the base material layer,
Release paper provided covering the adhesive layer of the patch,
A protective film provided covering the surface side of the base material layer of the patch,
A first slit that is formed over the entire length in the thickness direction of the patch and divides the patch into a main body part that is attached to the skin during use and a removal part that is removed during use,
A second slit that is formed over the entire length in the thickness direction of the release paper and divides the release paper into a peeling portion that is peeled off during use and a gripping portion that a user grips during use.
Equipped with
The patch is formed such that the cross-sectional area decreases from the main body part to the vicinity of the first slit, and the cross-sectional area increases from the vicinity of the first slit to the removal part. Sheet. The skin patch sheet according to claim 1, wherein the protective film has the same shape as the patch in plan view. The skin patch sheet according to claim 1 or 2, wherein an angle formed by the contour line of the main body portion and the contour line of the removal portion across the first slit is an acute angle in a plan view. 4. The skin patch sheet according to claim 1, wherein the main body has a circular, elliptical, polygonal, fan-shaped, or boomerang-shaped outer shape in a plan view. The skin patch sheet according to any one of claims 1 to 4, wherein the removing portion has a circular, elliptical, polygonal, fan-shaped, or boomerang-shaped outer shape in plan view. In the patch, the removal portion has a circular outer shape in a plan view, and the width dimension in a direction along the first slit in a plan view is 0. The skin patch sheet according to any one of claims 1 to 5, which is formed to be 4 times or less. The skin according to any one of claims 1 to 6, wherein the patch is formed so that a width dimension in a direction along the first slit is 2 mm or less at a position of the first slit in a plan view. A sheet for pasting. The skin adhesive sheet according to any one of claims 1 to 7, wherein the base material layer has a thickness of 5 µm or more and 50 µm or less, and the adhesive layer has a thickness of 15 µm or more and 60 µm or less. The protective film has a peel force of 0.028 N/20 mm or more and 0.064 N/20 mm or less with respect to the base material layer, and the adhesive material layer has an adhesive force of 1.263 N/20 mm or more and 2.947 N/ with respect to the stainless steel plate. The skin patch sheet according to any one of claims 1 to 8, which has a length of 20 mm or less. The protective film has a base portion that covers the main body portion of the patch and a protruding portion that covers the removal portion,
The protective film further comprises a third slit which is formed over the entire length in the thickness direction and which is an outer edge of the base portion and extends from a predetermined position near the end portion of the first slit in a plan view to a predetermined position inside the base portion. The skin patch sheet according to any one of claims 1 to 9. The skin patch sheet according to claim 10, wherein the third slit extends in a direction forming an acute angle with the first slit in a plan view. The skin patch sheet according to claim 10 or 11, wherein the third slit has a curved shape that is convex toward the first slit side in a plan view. The skin patch sheet according to claim 10, wherein the protective film has a pair of the third slits extending from the outer edges of the base portion in the vicinity of both ends of the first slit in a plan view.

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