A roll of hydrocolloid tape for application to the skin that is applied to the wound.

Abstract

To provide a hydrocolloid tape for skin application that minimizes the possibility of the leakage of an exudate from perforations.SOLUTION: A hydrocolloid tape for skin application comprises: a tape-shaped film serving as a base material; a hydrocolloid material laminated on one side of the film; and a line of perforations provided in the film, where the perforations include alternating cut and non-cut portions, the cut portions penetrating through the film, the non-cut portions not penetrating through the film; where the individual length of each cut portion in the line of perforations is at least less than 2.0 mm.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention is applied to the wound site. Rolled This relates to a hydrocolloid tape for application to the skin. [Background technology]

[0002] One method of treating wounds is to cover the wound with gauze. In this case, the gauze is fixed to the wound with tape or the like (see, for example, Patent Document 1). In recent years, hydrocolloid skin adhesives have become known that can be applied directly to the wound to perform moist wound healing (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4940385 [Patent Document 2] Japanese Patent Application Publication No. 2017-39706 Summary of the Invention [Problem to be solved by the invention]

[0004] Because hydrocolloid skin adhesives are applied directly to the wound, they are required to have the function of preventing exudate gushing from the wound from leaking outward. Therefore, when a hydrocolloid skin adhesive is made into a long tape that can be cut to a length appropriate to the size of the wound, if perforations are provided to make it easy to cut with fingers, the cuts in the perforations will cause exudate to leak out. Therefore, it has been practically difficult to provide perforations to make it easy to cut with fingers in a tape-shaped hydrocolloid skin adhesive.

[0005] Therefore, the present application discloses a hydrocolloid tape for application to the skin that minimizes the possibility of exudate leaking through perforations. [Means for solving the problem]

[0006] In order to solve the above problems, in the present invention, a hydrocolloid material is laminated on a film, and the length of each cut portion of the perforations provided in the film is at least less than 2.0 mm.

[0007] In detail, the present invention is a hydrocolloid tape for application to the skin, comprising a tape-shaped film as a base material, a hydrocolloid material laminated to one side of the film, and perforations in the film, which alternate between cut portions that penetrate the film and non-cut portions that do not penetrate the film, and the length of each cut portion of the perforations is at least 2.0 mm.

[0008] The length of each cut portion of the perforation may be 1.5 mm or less.

[0009] The perforations may also have individual cut portions each having a length of 1.0 mm or less.

[0010] The perforations may also have individual uncut portions that are less than 3.0 mm in length.

[0011] The perforations may also have individual uncut portions each having a length of 2.0 mm or less.

[0012] The perforations may also have individual uncut portions each having a length of 1.5 mm or less.

[0013] The total length of the uncut portions of the perforations may be 25% or more of the tape width.

[0014] The total length of the uncut portions of the perforations may be 48% or more of the tape width.

[0015] In addition, the hydrocolloid tape for skin application has a value of 4.3 x 10 tensile strength divided by peel strength at the perforation. -1 It may be more than that.

[0016] In addition, the maximum shear stress at the perforations of the above hydrocolloid tape for skin application is 2.1 × 10 1 It may be less than N. [Effects of the Invention]

[0017] According to the present invention, it is possible to minimize the possibility of exudate leaking through perforations. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 1 is a diagram showing a hydrocolloid tape for application to the skin according to an embodiment. [Figure 2] FIG. 2 is a diagram showing an example of how to use the hydrocolloid tape. [Figure 3] FIG. 3 is an enlarged view of the perforations. [Figure 4] FIG. 4 shows the pathways through which exudate leaks. [Figure 5] FIG. 5 shows the evaluation results. DETAILED DESCRIPTION OF THE INVENTION

[0019] The hydrocolloid tape for application to the skin according to the embodiments of the present invention will be described below with reference to the drawings. Note that the configurations of the following embodiments are merely examples, and the present invention is not limited to the configurations of these embodiments.

[0020] Fig. 1 shows a hydrocolloid tape for application to the skin according to an embodiment. In Fig. 1, the hydrocolloid tape 1 is shown in a roll form with a long tape wound around a core, but it is not limited to a roll form and may be, for example, in the form of a long, thin strip.

[0021] The hydrocolloid tape 1 comprises a tape-shaped film 2 serving as a base material and a hydrocolloid material 3 laminated on one side of the film 2 (the back side of the film 2 in the plane of FIG. 1 ). The hydrocolloid tape 1 is not limited to a form in which the hydrocolloid material 3 is not present on the other side of the film 2. For example, the hydrocolloid tape 1 may have the hydrocolloid material present on a portion of the surface of the film 2 (the side on which the hydrocolloid material 3 is not laminated). The film 2 has a plurality of perforations 4 at predetermined intervals along its length. The hydrocolloid tape 1 is a hydrocolloid-type skin adhesive that can be applied directly to a wound to perform moist wound healing. The perforations 4 are therefore provided so that the hydrocolloid tape 1 can be cut with the user's fingers to an appropriate length depending on the size of the wound. Therefore, it is preferable that the perforations 4 are provided in the film 2 at intervals that allow the user to aim at a specific perforation 4 and cut with their fingers, and that the perforations 4 be arranged in the film 2 at intervals that allow the user to adjust the size appropriately for the wound. The interval between such perforations 4 is preferably 5 to 80 mm, more preferably 10 to 70 mm, and even more preferably, 20 mm, for example.

[0022] Since the hydrocolloid tape 1 is a skin adhesive material that is applied directly to the wound, it is preferable to use an adhesive material for the hydrocolloid material 3 that is unlikely to stick to the wound and that is unlikely to cause maceration of the skin around the wound. Examples of suitable hydrocolloid materials include hydrophilic synthetic or natural polymers selected from the group consisting of phosphoric acid and its salts and derivatives, chitin and its derivatives, chitosan and its derivatives, pectin, cellulose and its derivatives, such as cellulose ethers or cellulose esters, cross-linked or non-cross-linked carboxyalkyl cellulose or hydroxyalkyl cellulose, polyvinyl alcohol, polyvinylpyrrolidone, agar, guar gum, and gelatin. The hydrocolloid material 3 may be in the form of a semi-solid gel or fiber, or a gel containing particles and fibers. The hydrocolloid material 3 may also be in the form of hydrocolloid particles contained in a sticky polymer.

[0023] It is preferable to use a material for the film 2 that allows the hydrocolloid material 3 to be easily peeled from the film 2 even when the hydrocolloid tape 1 is rolled and the hydrocolloid material 3 comes into contact with the surface of the film 2, and that has an appropriate strength so that the perforations 4 will not easily tear even when a slight load is applied to the perforations 4 when the film 2 is attached to the skin. Suitable materials for the film 2 include, for example, a PE film containing a release agent, a PE film coated with a release agent, or a PE film laminated with a release agent by lamination.

[0024] FIG. 2 shows an example of how to use the hydrocolloid tape 1. When applying the hydrocolloid tape 1 to a wound on the skin, as shown in FIG. 2(A), the required amount of hydrocolloid tape 1 is removed from the roll. Then, as shown in FIG. 2(B), the hydrocolloid tape 1 is cut by pulling while pressing with fingers near a specific perforation 4. Then, as shown in FIG. 2(C), the hydrocolloid tape 1 cut from the roll is placed on the wound T on the skin S. Then, as shown in FIG. 2(D), the hydrocolloid tape 1 is applied to the skin S so that the wound T on the skin S is completely covered with the hydrocolloid tape 1.

[0025] Because the hydrocolloid tape 1 has perforations 4 spaced at predetermined intervals, it is possible to prepare a hydrocolloid tape 1 that matches the size of the wound T without using a cutting tool such as scissors. However, because the hydrocolloid tape 1 has perforations 4 spaced at predetermined intervals, the perforations 4 may overlap the position of the wound T. Since exudate may ooze from the wound T, if the perforations 4 overlap the position of the wound T, there is a possibility that the exudate will leak from the gaps in the cut portions of the perforations 4.

[0026] FIG. 3 is an enlarged oblique view of the perforation 4. As shown in FIG. 3, the perforation 4 is a perforation in which cut portions 41, which are cut portions that penetrate the film 2, and uncut portions 42, which are uncut portions that do not penetrate the film 2, are arranged alternately. Due to the processing of the perforation 4, the cut portions 41 that penetrate the film 2 are configured to penetrate not only the film 2 but also the hydrocolloid material 3. Therefore, if the perforation 4 overlaps the position of the wound T, there is a possibility that exudate will leak through the gaps in the cut portions 41. However, with the hydrocolloid tape 1 of this embodiment, the dimensions of the cut portions 41 and the uncut portions 42 are appropriately set as described below, minimizing the possibility of exudate leaking through the cut portions 41 of the perforation 4.

[0027] FIG. 4 is a diagram showing the paths through which exudate leaks. For ease of explanation, the same reference numerals are used in both the embodiment shown in FIG. 4(A) and the comparative example shown in FIG. 4(B). In this embodiment, in which the dimensions of the cut portion 41 and the uncut portion 42 are appropriately set, even if the cut portion 41 is provided in the film 2, the flow path of the exudate F through the cut portion 41 is blocked by the hydrocolloid material 3, as shown in FIG. 4(A). Therefore, in this embodiment, the possibility of the exudate F leaking from the cut portion 41 is minimized. On the other hand, in the comparative example, in which the dimensions of the cut portion 41 and the uncut portion 42 are not appropriately set, the flow path of the exudate F through the cut portion 41 is not sufficiently blocked by the hydrocolloid material 3, A gap 43 may be formed, allowing exudate to leak through the cut portion 41 of the perforation 4.

[0028] Several types of prototypes were prepared in which the dimensions of the cut portion 41 and the uncut portion 42 were alternated, and various evaluations were carried out, the results of which are shown below. Figure 5 shows the evaluation results.

[0029] For this evaluation, a roll of hydrocolloid tape measuring 25 mm wide and 3 m long was prepared. This hydrocolloid tape consisted of a 40 μm-thick PE film containing a release agent, which served as the substrate for laminating the hydrocolloid material. A hydrocolloid material of 80 to 104 μm in thickness was then laminated onto this film. Methods for laminating the hydrocolloid material onto the film include direct coating onto the film, application of a coating to a substrate other than film and then attaching it to the film (transfer), and various other methods. The hydrocolloid tape had perforations spaced approximately 20 mm apart, with the cut and uncut sections alternately sized. Four different cut section sizes were available: 1.0 mm, 1.5 mm, 2.0 mm, and 3.0 mm. Four different uncut section sizes were also available: 1.0 mm, 1.5 mm, 2.0 mm, and 3.0 mm. From these, appropriate combination patterns were prepared, and six types were prepared for this evaluation, labeled "Prototype Name (Cut Dimensions / Uncut Dimensions)" as shown in Figure 5: "Prototype 1 (1.0mm / 1.0mm)," "Prototype 2 (1.0mm / 1.5mm)," "Prototype 3 (1.0mm / 3.0mm)," "Prototype 4 (1.5mm / 1.5mm)," "Prototype 5 (2.0mm / 2.0mm)," and "Prototype 6 (3.0mm / 1.0mm)." Because the width of the hydrocolloid tape is 25mm, the total dimensions of the cut portions (total cut portions) and the total dimensions of the uncut portions (total uncut portions) for each prototype are as shown in Figure 5.

[0030] In this evaluation, the following three items were evaluated. <Hard to tear when unwinding> This is an evaluation item to check that the hydrocolloid tape does not unintentionally tear at the perforations while being unwound from the roll. <Easy to tear by hand> This is an evaluation item to check whether the hydrocolloid tape can be easily cut with fingers at the perforations. <Leakage> This is an item to check whether exudate is unlikely to leak during use. In this evaluation, instead of exudate, hydrocolloid tape was applied to the position of a drop of water placed on the back of the hand so that the perforation overlapped, and the presence or absence of a drop of water adhering to the finger was confirmed by pressing the perforation with a finger (sensory evaluation). Since exudate is a secretion, it is thought to have a higher viscosity than water. Therefore, it is thought that water is more likely to leak from small areas than exudate. Therefore, in this application, if there is no water leakage from the perforation, it is considered that there is no leakage of exudate from the perforation.

[0031] As can be seen from the evaluation results in Figure 5, when the total length of the uncut portions was 6 mm, it was found that the tape would tear when unwound. Furthermore, when the total length of the uncut portions was 12 mm or more, it was found that the tape would not tear when unwound and would not cause any practical problems. From these results, it can be said that the total length of the uncut portions needs to be at least 25% of the tape width, and more preferably 48% or more of the tape width.

[0032] Furthermore, as can be seen from the evaluation results in Figure 5, when the length of each uncut portion is 3.0 mm or more, it was found that it was not easy to tear off the perforations with one's fingers. When the length of each uncut portion is 2.0 mm, it was found that it was possible to tear off the perforations with one's fingers. When the length of each uncut portion is 1.5 mm or less, it was found that it was easy to tear off the perforations with one's fingers. In this case, it was found that it was easy to tear off the perforations with fingers. From this result, it can be said that the length of each uncut portion must be at least less than 3.0 mm, preferably 2.0 mm or less, and more preferably 1.5 mm or less.

[0033] Furthermore, as can be seen from the evaluation results in Figure 5, when the length of each cut portion is 2.0 mm or more, water easily leaks through the gaps between the cut portions. Furthermore, when the length of each cut portion is 1.5 mm, water may leak through the gaps between the cut portions. Furthermore, when the length of each cut portion is 1.0 mm, water does not leak through the gaps between the cut portions. From these results, it can be seen that the length of each cut portion must be at least less than 2.0 mm, preferably 1.5 mm or less, and more preferably 1.0 mm or less.

[0034] Therefore, from the results of this evaluation, it can be seen that in the case of a hydrocolloid tape in which a hydrocolloid material having a thickness of 80 to 104 μm is laminated to a 40 μm thick PE film containing a release agent, if the total length of the uncut portions of the perforations is at least 25% of the tape width, the length of each of the uncut portions is at least less than 3.0 mm, and the length of each of the cut portions is at least less than 2.0 mm, the perforations can be torn and cut with fingers without tearing when unwinding, and water will not easily leak through the gaps in the cut portions. Furthermore, the results of this evaluation show that in the case of a hydrocolloid tape in which a hydrocolloid material having a thickness of 80 to 104 μm is laminated to a 40 μm-thick PE film containing a release agent, if the total length of the uncut portions of the perforations is at least 48% of the tape width, the length of each uncut portion is 1.0 mm or less, and the length of each cut portion is 1.0 mm or less, the perforations can be easily torn off with fingers without tearing when unwound, and water does not leak through the gaps in the cut portions. Therefore, in this evaluation, prototypes 1, 2, and 4 shown in Figure 5 can be said to be suitable as embodiments.

[0035] The results of this evaluation will depend on the material and thickness of the film, and the composition and thickness of the hydrocolloid material laminated to the film, but considering that exudate is less likely to leak than water, it is thought that a hydrocolloid tape made using, for example, a 20-60 μm thick PE film containing a release agent and laminated with a 40-200 μm thick hydrocolloid material will have the same effect as the above verification.

[0036] In this evaluation, the physical properties of the hydrocolloid tape, such as tensile strength, peel strength, and maximum shear stress, were also measured, as shown in Figure 5. For reference, the physical properties of a commercially available plastic tape and a commercially available adhesive bandage that can be torn by hand were also measured. The results of these measurements are described in detail below.

[0037] First, we will discuss the physical properties related to resistance to tearing during unwinding. The resistance of a rolled hydrocolloid tape to tearing when unwinding it from the roll is thought to be closely related to the tensile strength of the tape itself and the peel force when the tape separates from the roll (peel). For example, if the tensile strength is sufficient against the peel force, the tape will be less likely to tear at the perforations when unwinding it from the roll. Therefore, as shown in the table in Figure 5, in evaluating resistance to tearing during unwinding, we also measured the tensile strength and peel force when unwinding the rolled hydrocolloid tape from the roll. Because the tensile strength of the tape varies depending on the perforation condition (length of the cut and uncut portions), the values ​​shown in the table in Figure 5 are alternating for Prototypes 1 to 6. On the other hand, the peel force of the tape is consistent regardless of the perforation condition, so Prototypes 1 to 6 all show the same value, as shown in the table in Figure 5.

[0038] As can be seen from the evaluation results in Figure 5, for prototype 6, which broke when unwound, the value obtained by dividing the tensile strength by the peel force was 0.43. On the other hand, for prototypes 1 to 5, which did not break when unwound, the value obtained by dividing the tensile strength by the peel force was 0.64 to 0.82, all of which were greater than the 0.43 obtained for prototype 6. Therefore, from these measurement results, it can be seen that the value obtained by dividing the tensile strength by the peel force (= tensile strength / peeling force) for the resistance to tearing when unwound was 4.3 x 10 -1 It must be at least 6.4 × 10 -1 That's all there is to it.

[0039] Next, we will explain the physical properties related to hand tearability. The ease of tearing hydrocolloid tape when cutting it with your fingers at the perforations is thought to be closely related to the shear stress applied to the tape at the perforations. For example, if the maximum shear stress of the tape at the perforations is too high, it will not be easy to cut with your fingers. Therefore, as shown in the table in Figure 5, the maximum shear stress of the tape at the perforations was also measured in the evaluation of hand tearability. The maximum shear stress of the tape at the perforations varies depending on the state of the perforations (the length of the cut and uncut portions), so as shown in the table in Figure 5, the values ​​shown for prototypes 1 to 6 are alternating.

[0040] As can be seen from the evaluation results in Figure 5, for prototype 3, which could be torn by tearing the perforations with fingers (each uncut portion had a length of 3.0 mm or more), the maximum shear stress was 2.2 N. In contrast, for prototypes 1, 2, 4 to 6, which could be easily torn by tearing the perforations with fingers (each uncut portion had a length of 2.0 mm or less), the maximum shear stress was 0.8 to 1.4 N. Furthermore, for prototypes 1, 2, 4, and 6, which could be more easily torn by tearing the perforations with fingers (each uncut portion had a length of 1.5 mm or less), the maximum shear stress was 0.8 to 1.4 N. Furthermore, for a commercially available adhesive bandage that is advertised as being tearable by hand, the maximum shear stress was 20.6 N. Therefore, from these measurement results, it can be seen that the maximum shear stress for hand tearability is at least 2.1 x 10 1 N, preferably less than 2.2 x 10 0 N, more preferably less than 1.3×10 0 It can be said that it is less than N.

[0041] Furthermore, it can be said that the numerical ranges of such physical properties do not depend on the individual thicknesses of the films and hydrocolloid materials that make up the hydrocolloid tape. For example, the numerical ranges for the physical properties related to the resistance to tearing during unwinding are relative values ​​obtained by dividing the tensile strength by the peel force. Therefore, unless there is a significant difference in the strength of the film material itself, the thickness of the film does not affect the numerical range from an engineering perspective. Furthermore, for example, the numerical ranges for hand tearability are absolute values ​​that determine whether a person can tear the tape by hand. Therefore, regardless of the film thickness, it is sufficient that the film breaks somewhere within the thickness, and the numerical range of the maximum shear stress at which hand tearing is possible does not depend on the film thickness.

[0042] Therefore, regardless of the thickness of the individual films and hydrocolloid materials that make up the hydrocolloid tape, the value obtained by dividing the tensile strength at the perforation by the peel strength (= tensile strength / peeling strength) must be 4.3 x 10 -1 More preferably, it is 6.4×10 -1 The hydrocolloid tape described above is unlikely to tear when unwound. Furthermore, regardless of the thickness of the film or hydrocolloid material that constitutes the hydrocolloid tape, the maximum shear stress at the perforation must be at least 2.1 x 10 1 N, preferably less than 2.2 x 10 0 N, more preferably less than 1.3×10 0 Hydrocolloid tapes with a hardness of less than N can be said to be easily torn by hand. [Explanation of symbols]

[0043] S··Skin T··Wound F··Exudate 1. Hydrocolloid tape 2. Film 3. Hydrocolloid materials 4. Perforation 41 Cutting section 42 Uncut section 43. Gap

Claims

1. A tape-shaped film serving as a substrate having a uniform thickness; a hydrocolloid material laminated to one side of the film; perforations provided in the film and the hydrocolloid material, with cut portions penetrating the film and the hydrocolloid material and non-cut portions not penetrating the film and the hydrocolloid material arranged alternately; The value obtained by dividing the tensile strength by the peel force at the perforation is 4.3 × 10 －１ That's all. A roll-type hydrocolloid tape for application to the skin that is applied to the wound.

2. The perforations have an individual length of the uncut portion of less than 3.0 mm.

2. A roll-shaped hydrocolloid tape for application to the skin according to claim 1, which is applied to a wound site.

3. The perforations have an individual length of the uncut portion of 2.0 mm or less.

3. A roll-shaped hydrocolloid tape for application to the skin according to claim 1 or 2, which is applied to a wound.

4. The perforations have an individual length of the uncut portion of 1.5 mm or less. A roll-shaped hydrocolloid tape for application to the skin according to any one of claims 1 to 3, which is applied to a wound site.

5. The total length of the uncut portion of the perforation is 25% or more of the tape width. A roll-shaped hydrocolloid tape for application to the skin according to any one of claims 1 to 4, which is applied to a wound site.

6. The total length of the uncut portions of the perforations is 48% or more of the tape width. A roll-shaped hydrocolloid tape for application to the skin according to any one of claims 1 to 5, which is applied to a wound site.

7. The maximum shear stress at the perforation is 2.1 × 10 １ is less than N, A hydrocolloid tape for application to the skin, which is applied to a wound site according to any one of claims 1 to 6.

8. The hydrocolloid material seals the exudate that flows out from the wound site to perform moist wound healing. A roll-shaped hydrocolloid tape for application to the skin according to any one of claims 1 to 7, which is applied to a wound site.

9. The value obtained by dividing the tensile strength by the peel force at the perforation is 6.4 × 10 －１ That's all. A roll-shaped hydrocolloid tape for application to the skin, which is applied to a wound site according to any one of claims 1 to 8.

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