Heel patch

Abstract

To provide a heel patch capable of reducing pain caused by a wound including a crack on a heel as well as making it noticeable even when wearing a thin translucent stocking.SOLUTION: A heel patch 1 that is applied to cover a wound on a heel, comprises a base fabric 3 having a base material 31 composed of a single layer film and an adhesive layer 32 formed on one surface of the base material 31, and a 10% tension load (W), measured in accordance with JIS Z0237, of the base fabric 3 shall be 1.5 N / 20 mm or more.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a heel patch that is applied to cover a wound on the heel. [Background technology]

[0002] In general, the skin of the heels, ankles, knees, elbows, hands, etc. is easily keratinized. In particular, in winter, the skin loses its flexibility due to dryness, and the keratinized parts thicken, making it prone to cracks and chapped skin (hereinafter simply referred to as "cracks"). Such cracks often occur on the heels, which are particularly prone to keratinization. Even if the cracks on the heels try to close by natural healing powers, they tend to widen and not close easily due to the large load placed on them when standing up or walking, causing severe pain and the condition may continue to worsen.

[0003] As a measure against cracks that occur in the heels, heel patches are used (see, for example, Patent Documents 1 and 2).

[0004] Patent Document 1 discloses a heel patch that includes a stretchable base fabric formed into a shape that covers the heel, and has a layer of a wound healing promoter on the inner surface of the base fabric.

[0005] Patent Document 2 discloses a heel patch that includes a non-breathable latex sheet sized to widely cover the heel and surrounding area, and has an adhesive sheet that is slightly larger than the latex sheet attached to the back of the latex sheet, creating an adhesive section around the latex sheet, which is adhered to the skin to seal the heel and surrounding area, thereby ensuring moisturization of the heel. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2006-141929 A [Patent Document 2] JP 2000-24026 A Summary of the Invention [Problem to be solved by the invention]

[0007] In the heel patch of Patent Document 1, although the base fabric is formed into a three-dimensional shape to cover the heel, depending on the shape and size of the user's foot, the base fabric does not fit the heel well, resulting in gaps, and therefore cracks cannot be prevented from expanding when a large load is applied to the heel. On the other hand, in the heel patch of Patent Document 2, although the adhesive portion around the latex sheet adheres to the skin, the latex sheet itself does not adhere to the heel, so that cracks cannot be prevented from expanding when a large load is applied to the heel. Thus, in both the heel patches of Patent Documents 1 and 2, cracks still expand when a large load is applied when standing or walking, and pain cannot be reduced, so that they are still not satisfactory for use as a measure after cracks have occurred.

[0008] However, women in particular tend to dislike heel patches that are stuck to the heels being conspicuous, and this tendency is more pronounced when wearing thin, semi-transparent stockings. Therefore, there is a demand for heel patches that are not conspicuous even when worn with thin, semi-transparent stockings, particularly for women.

[0009] The present invention has been made in consideration of the above problems, and aims to provide a heel patch that can reduce pain caused by wounds, including cracks, on the heel and is not easily noticeable even when thin, semi-transparent stockings are worn. [Means for solving the problem]

[0010] The characteristic configuration of the heel patch according to the present invention for solving the above problems is as follows: A heel patch to be applied to cover a wound on the heel, The adhesive tape has a base fabric having a substrate made of a single-layer film and an adhesive layer formed on one side of the substrate, and the 10% tensile load (W) of the base fabric measured in accordance with JIS Z 0237 is 1.5 N / 20 mm or more.

[0011] According to the heel patch of this configuration, when a base fabric having a 10% tensile load (W) of 1.5N / 20mm or more measured according to JIS Z 0237 is applied to the skin around the wound on the heel via an adhesive layer so as to cover the wound, even if a large load acts on the skin around the wound when standing or walking, the movement of the skin that tries to stretch is restricted by the base fabric. This makes it possible to keep the wound from opening. Therefore, it is possible to reduce the pain caused by the wound, including the cracks, on the heel. In addition, in the heel patch of this configuration, since the base material, which is the main component of the base fabric, is made of a single-layer film, it is easy to make the base fabric thin, and it is difficult to be noticeable even when wearing thin, semi-transparent stockings, etc.

[0012] In the heel patch according to the present invention, The 10% tensile load (W) of the base fabric measured in accordance with JIS Z 0237 is preferably 5.0 N / 20 mm or less.

[0013] The heel patch of this configuration has a 10% tensile load (W) of the base fabric measured according to JIS Z 0237 of 5.0 N / 20 mm or less, so it can follow subtle surface deformations of the skin around the wound while keeping the wound from opening, and therefore can be kept attached for a long time without discomfort while reducing pain caused by the wound.

[0014] In the heel patch according to the present invention, It is preferable that the thickness of the fabric is 300 μm or less at the edge of the fabric.

[0015] If the thickness of the base fabric is too large, the physical height of the edge of the base fabric relative to the skin increases, and the base fabric is likely to get caught and roll up when rubbed against socks, including stockings. Therefore, in the heel patch of this configuration, the thickness of the base fabric is set to 300 μm or less at the edge of the base fabric. In this way, by setting the upper limit of the thickness of the edge of the base fabric to an appropriate value, the base fabric is less likely to roll up even if rubbed against socks, and the area where the wound has occurred (wound area) can be stably protected.

[0016] In the heel patch according to the present invention, The other surface of the substrate preferably has a dynamic friction coefficient measured in accordance with JIS P 8147 of 1.0 or less.

[0017] According to the heel patch of this configuration, the coefficient of dynamic friction of the other side of the base material, i.e., the side opposite to the side on which the adhesive layer that adheres to the skin is provided and which appears on the outside when applied to the heel, measured in accordance with JIS P 8147, is set to 1.0 or less, ensuring ease of slippage. This reduces the dynamic frictional force when rubbing against socks, stockings, etc., and makes the patch less likely to roll up even if it rubs against socks, etc., allowing the wound to be stably protected and effectively preventing runs in stockings.

[0018] In the heel patch according to the present invention, The adhesive layer preferably has an adhesive strength (F) to a SUS304 steel plate, measured in accordance with JIS Z 0237, of 2.0 to 15.0 N / 20 mm.

[0019] The heel patch of this configuration has an adhesive strength (F) to SUS304 steel plate measured in accordance with JIS Z 0237 of 2.0 to 15.0 N / 20 mm, so that even if a large load is applied when standing or walking, the adhesive strength required to keep the patch stably attached to the skin so as not to open the wound is ensured, and the base fabric can be intentionally removed from the skin.

[0020] In the heel patch according to the present invention, The ratio (W / F) of the 10% tensile load (W) to the adhesive strength (F) is preferably 0.1 to 2.5.

[0021] In the heel patch of this configuration, the 10% tensile load (W) is related to the non-stretchability that restricts the movement of the skin, and the adhesive force (F) is mainly related to the peelability to the skin. In order to restrict the movement of the skin when a large load acts on the skin around the wound and stretches it when standing up or walking, and to keep the wound from opening, while also allowing the skin to be easily peeled off without causing pain when intentionally removing it from the skin, the balance between the 10% tensile load (W) and the adhesive force (F) is extremely important. Therefore, in order to achieve both the non-stretchability that restricts the movement of the skin and the peelability to the skin in the heel patch and to make it easy to handle, the ratio (W / F) of the 10% tensile load (W) and the adhesive force (F) is set to 0.1 to 2.5 in the patch of this configuration. Within this range, the skin movement can be restricted even when standing up or walking, and the wound can be stably kept in a state where it does not open, and the skin can be easily peeled off without tearing when removed from the skin.

[0022] In the heel patch according to the present invention, The base fabric is A heel covering portion capable of partially covering the heel; A heel peripheral covering portion capable of partially covering the heel peripheral edge; A knob-shaped covering portion capable of partially covering an upper portion of the heel periphery, It is preferable that at least both side portions of the heel peripheral covering portion are formed into a constricted arc shape.

[0023] Wounds including cracks often occur from the heel (the rear part of the sole of the foot) to the heel periphery (the boundary between the heel and the periphery of the foot). The heel patch of this configuration has a heel covering part capable of partially covering the heel and a heel periphery covering part capable of partially covering the heel periphery, so that the wound on the heel or the heel periphery can be pinpoint covered. In this way, the wound can be covered with as small an area as possible without covering an excessively large area around the wound, which is advantageous in that it is economical and looks good after application. In addition, when the heel patch of this configuration is applied, the heel covering part partially covers the heel, and the heel periphery covering part partially covers the heel periphery, and these heel covering parts and heel periphery covering parts are difficult to see and access from the outside, whereas the knob-shaped covering part partially covers the upper part of the heel periphery and is easy to see and access from the outside. Therefore, the heel patch can be easily removed by pinching and peeling off the knob-shaped covering part. However, when standing or walking, the surface deformation of the skin around the heel is greater than that of the skin at the heel. Therefore, in the heel patch of this configuration, at least both sides of the heel periphery covering part are formed into a shape that is constricted in an arc. This allows the heel periphery covering part to follow the surface deformation of the skin around the heel, and prevents the heel periphery covering part from peeling off from the skin.

[0024] In the heel patch according to the present invention, The total area of ​​the base fabric is 200 to 1600 mm 2 It is preferable that:

[0025] According to the heel patch of this configuration, the total area of ​​the base fabric is 200 to 1600 mm 2 Within this range, the wound can be covered precisely without covering the wider areas around the wound, making it possible to achieve both functionality and cost-effectiveness, and, combined with the thinning, the wound can be made less noticeable. [Brief description of the drawings]

[0026] [Figure 1] FIG. 1 is an explanatory diagram of a heel patch. [Diagram 2]FIG. 2 is a six-view diagram of the base fabric. [Diagram 3] FIG. 3 is a six-view diagram of a heel patch. [Figure 4] FIG. 4 is a cross-sectional view that illustrates a typical laminated structure of the base fabric. [Diagram 5] FIG. 5 is an explanatory diagram of various measurement methods. [Figure 6] FIG. 6 is an explanatory diagram showing how to use the heel patch. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] The present invention will be described below with reference to the drawings. However, the present invention is not intended to be limited to the embodiments described below or the configurations shown in the drawings. In addition, in Figures 4 and 5, the base fabric 3 constituting the heel patch 1 of the present invention is shown to be composed of multiple layers, but the thickness relationship of each layer is appropriately exaggerated and does not strictly reflect the size relationship (scale) of the thickness of each layer in the actual base fabric.

[0028] <Overall composition> Fig. 1 is an explanatory diagram of a heel patch 1. Fig. 1(a) is a perspective view of the overall appearance of a base fabric 3. Fig. 1(b) is a perspective view of the overall appearance of the heel patch 1 of this embodiment, showing a state in which a release sheet 5 is attached to the base fabric 3.

[0029] The heel patch 1 comprises a base fabric 3 as shown in Figure 1(a). The heel patch 1 further comprises, as an optional component, a release sheet 5 as shown in Figure 1(b).

[0030] <Base fabric> FIG. 2 is a six-view diagram of the base fabric 3. FIG. 2(a) is a front view, FIG. 2(b) is a back view, FIG. 2(c) is a plan view, FIG. 2(d) is a bottom view, FIG. 2(e) is a right side view, and FIG. 2(f) is a left side view. As shown in FIG. 2(a), the base fabric 3 has a heel covering portion 11 capable of partially covering the heel, a heel peripheral covering portion 12 capable of partially covering the heel peripheral edge, and a knob-shaped covering portion 13 capable of partially covering the upper part of the heel peripheral edge. In the base fabric 3, the portion extending from the lower part to the middle part of the heel covering portion 11 is formed in a substantially semi-elliptical shape, and the upper edge of the knob-shaped covering portion 13 is formed in a convex arc shape. In addition, in the base fabric 3, both sides of the upper part of the heel covering portion 11 to the heel peripheral covering portion 12 and the lower half part of the knob-shaped covering portion 13 are formed in a shape that is constricted in an arc shape. In addition, when standing or walking, the surface deformation of the skin around the heel is greater than the surface deformation of the skin at the heel or above the heel periphery, so it is sufficient that at least both side portions of the heel periphery covering portion 12 are formed into an arc-shaped narrow shape.

[0031] <Release sheet> FIG. 3 is a six-sided view of the base fabric 3 with the release sheet 5 attached thereto, that is, a six-sided view of the heel patch 1 of this embodiment. FIG. 3(a) is a front view, FIG. 3(b) is a back view, FIG. 3(c) is a plan view, FIG. 3(d) is a bottom view, FIG. 3(e) is a right side view, and FIG. 3(f) is a left side view. As shown in FIG. 3(a) and (b), the release sheet 5 is attached to the surface of the adhesive layer 32 in the base fabric 3 so as to be peelable from the adhesive layer 32 during use, in order to cover and protect the adhesive layer 32 described below. The release sheet 5 may be composed of one sheet, but from the viewpoint of operability in temporary attachment to the heel and subsequent actual attachment, it is preferable that the release sheet 5 is composed of, for example, two separate pieces, a first release sheet piece 21 and a second release sheet piece 22.

[0032] As shown in Fig. 3(a), the first peelable sheet piece 21 has a first covering portion 21a that covers substantially the entire heel covering portion 11 (see Fig. 2(a)), and a first gripping portion 21b that is connected to the first covering portion 21a so as to be substantially flush with the first covering portion 21a. Meanwhile, the second peelable sheet piece 22 has a second covering portion 22a that covers the heel peripheral covering portion 12 and the grip-shaped covering portion 13 (see Fig. 2(a)), and a second gripping portion 22b that is connected to the second covering portion 22a so as to be folded back and overlapped on the second covering portion 22a. In the peelable sheet 5, the first gripping portion 21b is overlapped on the second gripping portion 22b so that the folded end of the second gripping portion 22b is exposed to the outside.

[0033] 4 is a cross-sectional view that illustrates a schematic layered structure of the base fabric 3. As illustrated in FIG. 4, the base fabric 3 includes a base material 31 and an adhesive layer 32 formed on one surface 31a of the base material 31.

[0034] <Base material> The substrate 31 is made of a single-layer film. As the single-layer film, for example, a plastic film made of polyvinyl chloride, polyurethane, polyester, polyamide, polyolefin, etc. is used. It is preferable to use a transparent or semi-transparent plastic film so that it is not noticeable when attached.

[0035] <Adhesive layer> The adhesive layer 32 is formed by applying a thin film of an adhesive to one surface 31a of the base material 31. The type of adhesive is not particularly limited, but examples thereof include natural rubber adhesives, synthetic rubber adhesives, acrylic adhesives, urethane adhesives, silicone adhesives, and the like.

[0036] <10% tensile load (W)> The base fabric 3 has a 10% tensile load (W) of 1.5 N / 20 mm or more measured in accordance with JIS Z 0237. If the 10% tensile load (W) is 1.5 N / 20 mm or more, the wound can be kept from opening. As described above, the adhesive layer 32 in the base fabric 3 is formed by applying an adhesive in a thin film form, and therefore has almost no effect on the tensile strength, so the tensile strength of the base fabric 3 is essentially the tensile strength of the substrate 31.

[0037] The 10% tensile load (W) of the base fabric 3 is preferably 5.0 N / 20 mm or less. If the 10% tensile load (W) is 5.0 N / 20 mm or less, the base fabric 3 can follow subtle surface deformations of the skin around the wound and can be kept attached for a long period of time without any discomfort.

[0038] <10% tensile load (W)> FIG. 5 is an explanatory diagram of various measurement methods. FIG. 5(a) is an explanatory diagram of a measurement method of 10% tensile load (W). In the measurement method of 10% tensile load (W), as shown in FIG. 5(a), a base fabric 3 that actually functions as a heel patch is cut to a width of 20 mm and a length of 70 mm to prepare it as a sample 50. Then, chucks (not shown) are attached to both ends of the sample 50 so that the chuck clamping margin is 15 mm and the chuck distance is 40 mm, and the sample is stretched by 10% in the length direction at a speed of 300 mm / min. In this state, the stress (N) generated in the sample 50 is measured and converted into the load (N / 20 mm) per 20 mm width of the sample 50. This method is a measurement method based on JIS Z 0237.

[0039] <Thickness of base fabric> The thickness of the base fabric 3 (the total thickness of the substrate 31 and the adhesive layer 32) is preferably 300 μm or less at the edge of the base fabric. If the thickness of the base fabric 3 is too large, the physical height of the edge of the base fabric 3 against the skin increases, and the base fabric 3 is likely to get caught and roll up when rubbed against socks, stockings, etc. Therefore, the thickness of the base fabric 3 is set to 300 μm or less at the edge of the base fabric 3. In this way, by setting the upper limit of the thickness at the edge of the base fabric 3 to an appropriate value, the base fabric 3 is unlikely to roll up even if rubbed against socks, stockings, etc., and the wound can be stably protected. It is preferable that the thickness of the base fabric 3 is relatively large in the center and becomes thinner toward the edge. By adopting such a configuration, the thickness of the central portion which actually covers the wound is relatively large, and the thickness decreases as it progresses towards the edges, making the thickness of the edges which are likely to get caught when rubbing against socks, stockings, etc., relatively small. This reliably absorbs external shocks acting on the wound and makes the garment less likely to roll up even if it rubs against socks, stockings, etc.

[0040] <Kinematic friction coefficient> The other side 31b of the substrate 31 (see FIG. 4) preferably has a dynamic friction coefficient of 1.0 or less as measured in accordance with JIS P 8147. By setting the dynamic friction coefficient of the other side 31b of the substrate 31, i.e., the other side 31b that appears on the outside when attached to the heel opposite the side 31a on which the adhesive layer 32 that adheres to the skin is provided, to 1.0 or less, it is possible to ensure ease of slipping. This reduces the dynamic frictional force when rubbing against socks, stockings, etc., and makes it difficult for the socks to roll up even if they rub against the socks, etc., thereby stably protecting the wound and effectively preventing runs in the stockings.

[0041] If necessary, a coating layer can be provided on the other side 31b of the substrate 31 to reduce the dynamic friction coefficient of the surface and improve slipperiness. Specifically, as described below, it is preferable to coat so that the dynamic friction coefficient is 1.0 or less when measured based on JIS P 8147. As the coating treatment agent, for example, a treatment agent such as a pigment, an acrylic resin, a urethane resin, or a medium is used, and the coating is preferably performed by printing or spraying. The treatment agent can be applied in a flat shape, but it may also be applied in a dotted or linear shape.

[0042] <Method of measuring the dynamic friction coefficient> Fig. 5(b) is an explanatory diagram of a method for measuring the dynamic friction coefficient. The dynamic friction coefficient can be measured, for example, using a constant-speed extension tensile tester (EZ Test, manufactured by Shimadzu Corporation). That is, as shown in Fig. 5(b), a polyester base fabric is used as sample 101, which is fixed on a sample stage 102 in a constant-speed extension tensile tester 100, and a sample 50' similar to the sample 50 is placed on the sample 101 so that the surface (surface indicated by the symbol "31b" in Fig. 4) of the sample 50' on the side of the substrate 31 (see Fig. 4) of the sample 50' contacts the upper surface of the sample 101, and a weight (a brass cube with a square of 20 mm) 103 weighing 26.9 g is placed on the surface of the sample 50' on the side of the adhesive layer 32 (see Fig. 4), and a pull string 104 attached to the sample 50' is connected to a load cell 106 via a pulley 105. Then, the pull string 104 is pulled via the load cell 106 at a pulling speed of 100 mm / min to slide the sample 50' on the sample 101, and the resistance force (friction force) generated at that time is measured by the load cell 106. This measurement method is in accordance with JIS P 8147.

[0043] <Adhesive force (F)> The adhesive layer 32 preferably has an adhesive strength (F) of 2.0 to 15.0 N / 20 mm against a SUS304 steel plate measured in accordance with JIS Z 0237. If the adhesive strength (F) is within this range, the adhesive strength required for stably maintaining the patch on the skin so as not to open the wound is ensured even when a large load is applied when standing or walking, and the base fabric can be intentionally removed from the skin.

[0044] <Adhesive force (F)> Fig. 5(c) is an explanatory diagram of a method for measuring adhesive strength (F). As shown in Fig. 5(c), the adhesive strength (F) is measured by attaching a sample 50' (before pasting) similar to the sample 50 to a stainless steel plate N having a BA surface finish via the adhesive layer 32 of the sample 50'. Next, the sample 50' is peeled from one end of the stainless steel plate N in the opposite direction (180° direction) at a predetermined speed, and the stress (N) generated in the sample 50' is measured and converted into the load (N / 20mm) per 20mm width of the sample 50'. This method is a measurement method conforming to JIS Z 0237.

[0045] <10% tensile load (W) / adhesive strength (F)> In the heel patch 1, the ratio of the 10% tensile load (W) to the adhesive strength (F) is preferably set to 0.1 to 2.5. In the heel patch 1, the 10% tensile load (W) is related to the non-stretchability that restricts the movement of the skin, and the adhesive strength (F) is mainly related to the peelability to the skin. In order to restrict the movement of the skin when a large load acts on the skin around the wound and stretches it when standing up or walking, and to keep the wound from opening, while at the same time, to easily peel it off without causing pain to the skin when intentionally removing it from the skin, the balance between the 10% tensile load (W) and the adhesive strength (F) is extremely important. Therefore, in order to achieve both the non-stretchability that restricts the movement of the skin and the peelability in the heel patch and to make it easy to handle, the ratio (W / F) of the 10% tensile load (W) to the adhesive strength (F) is set to 0.1 to 2.5 in the patch of this configuration. Within this range, the movement of the skin can be restricted even when standing or walking, preventing the wound from opening, and the film can be easily peeled off without tearing when removed from the skin.

[0046] <Total area of ​​base fabric> In the heel patch 1, the total area of ​​the base fabric 3 is 200 to 1600 mm 2 If the thickness falls within this range, the wound can be covered precisely without covering an excessively large area around the wound, making it possible to achieve both functionality and cost-effectiveness, and, combined with the thinning, the wound can be made less noticeable.

[0047] <How to use the heel patch> Fig. 6 is an explanatory diagram of how to use the heel patch 1. When using the heel patch 1, first, as shown in Fig. 6(a), the first gripping portion 21b is pinched to peel off the first release sheet piece 21 from the base fabric 3. Next, as shown in Fig. 6(b), the exposed adhesive layer 32 (see Fig. 4) of the heel covering portion 11 is attached to the skin around the wound (S) that has occurred from the heel (K) through the heel periphery (Ka) to the upper part (Kb) of the heel periphery so as to cover the wound (S) at the heel (K). Next, as shown in Figs. 6(c)-(d), the second gripping portion 22b is pinched to roll up the second covering portion 22a while attaching the heel periphery covering portion 12 to the heel periphery (Ka), and then the pinched covering portion 13 is attached to the skin at the upper part (Kb) of the heel periphery.

[0048] As shown in FIG. 6(d), when the base fabric 3 of the heel patch 1 is applied to the skin surrounding the wound (S) on the heel (K) so as to cover it, even if a large load acts on the skin surrounding the wound (S) when standing or walking, the movement of the skin that tries to stretch is restricted by the base fabric 3. In this way, the wound (S) can be kept from opening. Therefore, the pain caused by the wound (S) including cracks on the heel (K) can be reduced. In addition, in the heel patch 1 of this configuration, since the base material that is the main component of the base fabric 3 is made of a single layer film, the base fabric 3 can be easily made thin, and it is difficult to notice even when wearing thin, semi-transparent stockings, etc. EXAMPLES

[0049] Examples of the heel patch of the present invention will be described below, but the present invention is not limited to these examples.

[0050] [Example regarding 10% tensile load (W)] (Examples 1 to 4, Comparative Examples 1 to 3) Heel patches (corresponding to base fabric 3 in this embodiment) of Examples 1 to 4 and Comparative Examples 1 to 3 were obtained by applying an adhesive to four types of single layer films with different properties and characteristics. The obtained heel patches were applied to the heel, heel rim and upper heel rim of 36 subjects, and pain relief and adhesion comfort during daily life were evaluated. The evaluation results of Examples 1 to 4 are shown in Table 1, and the evaluation results of Comparative Examples 1 to 3 are shown in Table 2. The evaluation criteria indicated by the symbols A to C in Tables 1 and 2 are as follows: <Evaluation criteria> A: Reduced. B: It was slightly alleviated. C: Not alleviated.

[0051] [Table 1]

[0052] [Table 2]

[0053] As shown in Table 1, the heel patches of Examples 1 to 4 all had a 10% tensile load (W) of 1.5 N / 20 mm or more measured in accordance with JIS Z 0237. The heel patches of Examples 3 and 4 all received a pain reduction rating of "A" or "B," indicating very good or good results. On the other hand, as shown in Table 2, when the 10% tensile load (W) was less than 1.5 N / 20 mm (Comparative Examples 1 to 3), some subjects did not experience pain reduction, indicating that a 10% tensile load (W) of 1.5 N / 20 mm or more is sufficient to solve the problem of reducing pain. However, when the 10% tensile load (W) significantly exceeded 5.0 N / 20 mm (Example 1), 14 out of 36 subjects indicated that the application sensation was uncomfortable. Taking the application sensation into consideration, it was found that the 10% tensile load (W) should be 5.0 N / 20 mm or less, preferably 4.5 N / 20 mm or less, and more preferably 1.7 N / 20 mm or less.

[0054] [Examples relating to dynamic friction coefficient] Samples of heel patches (corresponding to the base fabric 3 of this embodiment) with different dynamic friction coefficients measured by the method shown in Figure 5(b) were prepared, and the obtained samples were applied to the heels, heel rims, and upper heel rims of 36 subjects, and the number of subjects who experienced peeling during daily life was investigated. The results are shown in Table 3.

[0055] [Table 3]

[0056] The results in Table 3 above show that the heel patch of the present invention (corresponding to the base fabric 3 in this embodiment) with a dynamic friction coefficient of 1.0 or less has the characteristic of being resistant to peeling.

[0057] [Examples regarding adhesive strength (F)] Using various adhesives, samples of heel patches (corresponding to the base fabric 3 of this embodiment) with different adhesive strengths (F) measured by the method shown in Figure 5(c) were prepared, and the samples were applied to the heels and surrounding skin of 36 subjects for 8 hours, after which the peeling state and pain when peeling were investigated. The results are shown in Table 4.

[0058] [Table 4]

[0059] When the adhesive strength (F) was 2.81 N / 20 mm, peeling was observed in five subjects, but adhesion to the skin was improved and it was judged to have reached a practical level. When the adhesive strength (F) was 3.78 N / 20 mm and 6.43 N / 20 mm, adhesion to the skin was greatly improved, and when the adhesive strength (F) was 3.78 N / 20 mm, although one subject complained of pain when peeling, it was judged to have reached a practical level, so it was found that an adhesive strength (F) of 2.81 N / 20 mm to 6.43 N / 20 mm is more preferable.

[0060] [Example regarding 10% tensile load (W) / adhesive strength (F)] For multiple combinations of 10% tensile load (W) and the above adhesive strength (F), the ratio (W / F) was calculated, and the same pain relief evaluation and ease of peeling evaluation as above were performed. The results are shown in Table 5. The evaluation criteria for ease of peeling, indicated by symbols A to C in Table 5, are as follows: <Evaluation criteria> A: No adhesive residue was found on the skin and it was easy to peel off. B: Adhesive residue was found on the skin, but it was easily removed. C: Adhesive residue was found on the skin, and some of it had broken.

[0061] [Table 5]

[0062] As shown in Table 5, it was found that if the ratio (W / F) of the 10% tensile load (W) to the adhesive strength (F) is in the range of 0.22 to 4.14, it is possible to restrict the movement of the skin even when standing or walking, thereby keeping the wound stable and preventing it from opening, thereby reducing pain, and also to easily peel the film off without tearing when removed from the skin.

[0063] The heel patch of the present invention has been described above based on embodiments and examples, but the present invention is not limited to the configurations described in the above embodiments and examples, and the configurations can be changed as appropriate within the scope of the spirit of the present invention. [Industrial Applicability]

[0064] The heel patch of the present invention can be used to protect wounds on the heel and relieve pain, but it can also be used on other parts of the body (e.g., the ankle, knee, elbow, hand, joint, etc.) besides the heel. [Explanation of symbols]

[0065] 1. Heel patch 3 Base fabric 11 Heel Coverage 12 Heel circumference covering part 13 Knob-shaped covering part 31 Base material 32 Adhesive layer

Claims

1. A heel patch to be applied to cover a wound on the heel, The wound patch is provided with a base fabric having a substrate made of a single layer film and an adhesive layer formed on one side of the substrate, the base fabric having a 10% tensile load (W) of 1.5 N / 20 mm or more as measured in accordance with JIS Z 0237, and configured to keep the wound from opening; The base fabric is A heel covering portion capable of partially covering the heel; A heel peripheral covering portion capable of partially covering the heel peripheral edge; A knob-shaped covering portion capable of partially covering an upper portion of the heel periphery, The heel patch has a substantially semi-elliptical shape extending from the lower to the middle portion of the heel covering portion, an upper edge of the knob-shaped covering portion is formed in a convex arc shape, and both side portions of the heel covering portion extending from the upper portion of the heel covering portion to the heel peripheral covering portion and the lower half portion of the knob-shaped covering portion are formed in an arc-shaped narrowed shape.

2. 2. The heel patch according to claim 1, wherein the 10% tensile load (W) of the base fabric measured in accordance with JIS Z 0237 is 5.0 N / 20 mm or less.

3. 3. The heel patch according to claim 1, wherein the thickness of the base fabric is 300 μm or less at the edge of the base fabric.

4. 3. The heel patch according to claim 1, wherein the other surface of the substrate has a dynamic friction coefficient of 1.0 or less as measured in accordance with JIS P 8147.

5. 3. The heel patch according to claim 1, wherein the adhesive layer has an adhesive strength (F) to a SUS304 steel plate, measured in accordance with JIS Z 0237, of 2.0 to 15.0 N / 20 mm.

6. 6. The heel patch according to claim 5, wherein the ratio (W / F) of the 10% tensile load (W) to the adhesive strength (F) is 0.1 to 2.

5.

7. The total area of ​​the base fabric is 200 to 1600 mm ２ 3. The heel patch according to claim 1 or 2, which is

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