HK1239506B - Medical tape - Google Patents

Description

Medical belts

Technical Field

The present invention relates to a medical tape that is applied to wounds during the healing process of skin wounds or scars after wound healing. In particular, it relates to a medical tape that is applied to scars during the maturation process of scars after healing of skin wounds caused by surgery, trauma, etc., and is effective in inhibiting or preventing the thickening, expansion, and stretching of scars.

Background Art

Conventionally, medical tapes applied to wounds to promote wound healing or to prevent thickening, enlargement, and extension of scars after wound healing have often been made of paper and are not stretchable. When used during the maturation process of scars after wound healing, these tapes do not exert sufficient stress on the scars, resulting in a poor effect in preventing thickening, enlargement, and extension.

Furthermore, although various surgical suturing instruments (fixing devices with caliper-like jaws that secure the wound from the skin) are used to close the wound during wound healing, they are very damaging to the skin. Although similar to bandages in securing the skin, they are removed after the wound has healed and are therefore ineffective in preventing scar thickening, enlargement, and extension during scar maturation.

Furthermore, a surgical wound-sealing tape used in combination with sutures to seal skin wounds has been proposed (see Patent Document 1). This tape has multiple depressions on its surface. When applied to the wound surface with a tensile stress, the elastic restoring force of the depressions temporarily seals the wound and promotes wound healing. However, since this tape applies tensile stress to all surfaces, the contractile force of the tape also acts on areas other than the wound after application, making it difficult to maintain continuous application on the skin for an extended period of time. Furthermore, there is the problem of dirt accumulating in the depressions and becoming easily dirty. Furthermore, this tape is removed after the wound has healed and has no effect on the thickening, expansion, or extension of the scar during scar maturation.

Furthermore, although scar maturation varies from person to person, it takes a very long time. When applied to the skin for such a long time, a tape that puts less strain on the skin is desired. However, currently, there is no medical tape that can meet this requirement.

Prior art literature

Patent Literature

Patent Document 1: Japanese Patent No. 2571775

Summary of the Invention

Problems to be solved by the invention

The present invention has been created in view of the current status of the above-mentioned prior art, and its purpose is to provide a medical tape suitable for being adhered to a wound in order to promote the healing of skin wounds or to be adhered to a scar in order to inhibit and prevent the thickening, expansion, and stretching of scars after wound healing. In particular, it is to provide a medical tape that applies stress to the wound or scar while being adhered, promoting the fusion of the wound through its elastic recovery force (contraction force), or inhibiting the thickening, expansion, and stretching of the scar while limiting the contraction range of the base material to the vicinity of the wound or scar surface, thereby minimizing the burden on the skin during adhesion.

Means for solving problems

That is, the present invention has the following structures (1) to (7).

(1) A medical tape characterized by comprising a soft substrate, a release paper, and a removable support, wherein the substrate is made of a plastic film or foil and has elasticity, the release paper is adhered to one side of the substrate via a pressure-sensitive adhesive layer, a silicon coating layer and a slightly adhesive layer are sequentially formed on the other side of the substrate, the support is made of two sheets of plastic film and is adhered to the other side of the substrate via the silicon coating layer and the slightly adhesive layer, and the support is butted against each other in the middle of the long side direction of the substrate and across the width direction of the substrate.

(2) The medical tape as described in (1) is characterized in that it also has a divisible support body peeling sheet, the support body peeling sheet is composed of an adhesive plastic tape, the adhesive plastic tape is adhered to cover the docking portion of the support body, and the support body peeling sheet has a cut, and the cut is formed in approximately the same shape and approximately the same position as the docking portion of the support body.

(3) The medical tape according to (1) or (2), wherein the base material is made of a polyurethane film or foil having a thickness of 5 μm to 100 μm.

(4) The medical tape according to any one of (1) to (3), wherein the support body is made of a PET film having a thickness of 20 μm to 120 μm.

(5) The medical tape according to any one of (2) to (4), wherein the adhesive force of the pressure-sensitive adhesive layer between the substrate and the release paper is greater than the adhesive force of the slightly adhesive layer between the silicone coating layer and the support.

(6) The medical tape according to any one of (1) to (5), characterized in that, when the support body is adhered to the base material, the base material is stretched in the direction of separating the support body peeling sheet, centered on the portion of the base material where the two support bodies are connected and not separated from the support body at the joint portion.

(7) The medical tape according to any one of (1) to (6), characterized in that it is used to suppress or prevent scar hypertrophy, expansion, or extension during scar maturation after wound healing.

Effects of the Invention

The medical tape of the present invention consists of two removable supports bonded together across the width of a stretchable base material via a silicone coating and a slightly adhesive layer. Therefore, when the base material is stretched in the direction separating the two supports while being applied to a wound or scar, the stress load on the base material is limited, preventing the support material from lifting. Contraction occurs only near the area contacting the wound or scar, while the rest of the area is not subjected to contraction force. Consequently, application of the tape minimizes stress on the skin, making it less likely to cause skin rashes.

Furthermore, since the medical tape of the present invention has the support and the support release sheet bonded to the base material, it is possible to effectively prevent dirt and dust from entering and adhering to the base material or from contaminating the base material during storage.

Furthermore, the medical belt of the present invention is provided with a support peeling sheet on the docking portion of the support body to enhance the rigidity of the docking portion. Therefore, after the stretchable substrate is adhered to the adhered body, the end of the support body to which the support peeling sheet is adhered will separate from the substrate due to the slight bending of the substrate and easily float up. The floated end effectively functions as a pull head (pull tab) for peeling the support body from the substrate, which can help to cleanly and easily peel the support body from the substrate.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a longitudinal cross-sectional view of the medical tape of the present invention.

FIG. 2 is a plan view of the medical tape of FIG. 1 .

DETAILED DESCRIPTION

An example of the medical tape of the present invention will be described below with reference to the accompanying drawings. However, the present invention is not limited thereto. Furthermore, in the description of the medical tape of the present invention, the terms "long side direction" and "width direction" are used. However, in the case of a square medical tape, since the long side and the width direction have the same length, these terms refer to the directions of simply orthogonal sides.

Figure 1 is a longitudinal cross-sectional view of an example of a medical tape according to the present invention, and Figure 2 is a top view thereof. In the figure, reference numeral 1 represents a film or foil-like substrate, reference 2 represents a pressure-sensitive adhesive layer provided on one side of substrate 1, reference 3 represents a release paper provided on pressure-sensitive adhesive layer 2, reference 4 represents the butt joint of release paper 3, reference 5 represents a silicone coating provided on the other side of substrate 1, reference 6 represents a slightly adhesive layer provided on silicone coating layer 5, reference 7 represents a support body formed of two butt jointed plastic films provided on slightly adhesive layer 6, reference 8 represents the butt joint of the two support bodies 7, reference 9 represents the adhesive layer, and reference 10 represents a release sheet for the support body that, together with adhesive layer 9, constitutes the adhesive plastic tape. Furthermore, release sheet 10 has a cutout substantially identical in shape to the butt joint 8 of the two support bodies 7 and formed at substantially the same position, allowing the two release sheets 10 to be easily separated in opposite directions.

The base material 1 used in the medical band of the present invention is composed of a stretchable and flexible plastic film or foil, for example, a thermoplastic resin such as polyethylene resin, polypropylene resin, polyvinyl chloride resin, polyurethane resin, polyamide resin, ethylene-vinyl acetate copolymer resin, polyester resin, polyvinyl alcohol resin, polyacrylate resin, polycarbonate resin, fluorine-containing copolymer resin, polystyrene resin, or polyvinylidene chloride resin. Among these, polyurethane resin is particularly preferred as the base material of the present invention because it exhibits selective stretchability and minimizes stress on the skin. The base material preferably has a thickness of 5 μm to 100 μm, more preferably 5 μm to 30 μm, and even more preferably 5 μm to 20 μm.

The substrate 1 may be transparent or opaque, colored or uncolored, but when applied to an area where a wound or scar must be viewed from above, a film that is transparent when stretched is preferred.

A pressure-sensitive adhesive layer 2 is provided on one side of a substrate 1. For medical use, a pressure-sensitive adhesive layer 2 is selected that is less prone to rash and irritation. The main component of the pressure-sensitive adhesive layer can be suitably selected from natural rubber, aqueous polymer emulsions, thermoplastic rubbers, polyurethanes, polyacrylate copolymers, and the like. Alternatively, any aqueous or solvent-based solvent can be used as the solvent.

A release paper 3 is provided on the pressure-sensitive adhesive layer 2 to cover the entirety of the pressure-sensitive adhesive layer 2. As shown in Figures 1 and 2, the release paper 3 can be composed of two release papers that cover the surface of the pressure-sensitive adhesive layer 2 and are butted together in the width direction W. As the material of the release paper 3, any material commonly used as a release paper for a tape can be used, and suitable materials include silicone-treated glass paper or plastic films such as PET, OPP, Teflon (registered trademark) film, kraft paper, glass paper, and high-grade paper laminated with silicone-treated polyethylene. The release paper 3 can be peeled off in the following manner, that is, the butt joint 4 is folded into a mountain shape as the top, the pressure-sensitive adhesive layer 2 and the release paper 3 are peeled off at the butt joint 4, and the two peeled parts thus obtained are respectively held and stretched toward the two end directions. In this case, it is preferred to print an arrow indicating the peeling direction on the release paper 3.

The peeling force of the release paper 3 from the pressure-sensitive adhesive layer 2 is preferably such that there is no concern that peeling is troublesome during application or that interlayer separation of the release agent layer may occur.

On the other side (back side) of the substrate 1, a silicon coating layer 5 and a slightly adhesive layer 6 are sequentially formed, and a support 7 composed of two plastic films is releasably adhered therethrough.

The support 7 has a butt joint 8 in the middle of the longitudinal direction of the substrate, which is butt jointed with each other in the width direction. In addition, a support release sheet 10 (adhesive layer 9) composed of an adhesive plastic tape of a desired width is bonded and provided on the butt joint 8 of the support 7 in the width direction W.

Here, the two plastic films constituting the support 7 can be selected from films composed of known thermoplastic resins. These plastic films need to be able to be peelably attached to the foil or film constituting the aforementioned substrate 1 via the silicon coating layer 5 and the slightly adhesive layer 6, and have dimensional stability that can suppress the elongation of a portion of the substrate 1 when the substrate 1 is stretched. As these plastic films, films such as polyethylene resin, polypropylene resin, polyester resin, polyamide resin, and polyvinyl chloride resin can be appropriately selected in combination with the substrate 1. Among them, PET film is preferably used from the perspective of its ability to follow the adhered body and dimensional stability. The thickness of the support 7 is preferably 20 μm to 120 μm, more preferably 20 μm to 100 μm, and even more preferably 20 μm to 80 μm.

The support 7 is constructed by butting two plastic films together across the width direction W. The butted portion 8 is located in the middle of the longitudinal direction of the substrate 1, specifically at a position between one-quarter and three-quarters of the length of the substrate 1 from one end thereof in the longitudinal direction L. The butted portion 8 is preferably provided in the width direction with a length of between 3 mm and 15 mm, and more preferably between 4 mm and 10 mm. The shape of the butted portion 8 is preferably a combination of straight and curved lines drawn in a single stroke from one end to the other in the width direction. Examples of these shapes include key-shaped and wavy geometric shapes.

A silicon coating layer 5 and a slightly adhesive layer 6 are provided between the substrate 1 and the support 7. The slightly adhesive layer 6 is provided to adhere the substrate 1 and the support 7 with a force smaller than that of the adhesive layer 9 between the support 7 and the support release sheet 10. The silicon coating layer 5 is provided to reduce the peeling force relative to the substrate 1 when the support 7 is peeled off. Furthermore, the silicon coating layer 5 facilitates the sliding of the support 7 when the substrate is stretched, thus preventing the substrate from breaking. It is known that without the silicon coating layer 5, the faster the substrate is stretched, the more likely it is to break. The silicon coating layer 5 is not particularly limited as long as it is composed of slippery silicon. For example, a silicon coating layer composed mainly of polydimethylsiloxane with polymethylhydrogensiloxane added as a crosslinking agent can be used. The molecular weight, functional group content, and chemical composition of the polydimethylsiloxane, as well as the amount, molecular weight, and chemical composition of the polymethylhydrogensiloxane, can be appropriately varied and selected. The thickness of the silicon coating layer 5 is preferably 0.5 to 10 μm, more preferably 1 to 5 μm. The micro-adhesive layer 6 is a layer with extremely weak adhesion, and the same material as the pressure-sensitive adhesive layer 2 can be used. For example, a polyacrylate copolymer is used, and any of water-based and solvent-based solvents is used as the solvent. The thickness of the micro-adhesive layer is preferably 1 to 15 μm, more preferably 2 to 8 μm. The silicon coating layer 5 makes it possible to grasp the two ends of the support body 7 after removing the release paper 3, and when the substrate 1 is stretched in the direction of dividing the support body 7 into two, the support body 7 slides together with the micro-adhesive layer 6, and only the substrate 1 near the docking portion 8 is stretched without the support body 7 floating from the substrate 1. Accordingly, the contraction force in the long side direction can be applied only to the substrate 1 near the docking portion 8. As a result, the shrinkage range of the substrate can be limited to the wound surface or scar surface, and the burden on the skin part other than the wound surface or scar surface during adhesion can be reduced.

The support body peeling sheet 10 is a component provided on the docking portion 8 of the support body 7 to cover it in order to facilitate the peeling of the support body 7 and to prevent the contamination of the docking portion 8 of the support body 7. It is preferably provided over the entire width direction with a length of 1/2 to 1/6 of the length in the long side direction. The support body peeling sheet 10 has the same shape as the docking portion 8 of the support body 7 and a cut (or docking portion) formed at the same position, and can be divided into two. The support body peeling sheet 10 and the adhesive layer 9 are composed of an adhesive plastic tape. In terms of dimensional stability, it is preferably composed of the same material as the support. The adhesive layer 9 is composed of a conventionally known adhesive, and any aqueous or solvent-based solvent can also be used. The thickness of the support body peeling sheet 10 is preferably 2μm to 100μm, and more preferably 10μm to 50μm.

In the medical tape of the present invention, when the substrate is stretched 3 mm with the support body 7 attached to the substrate 1, the tensile strength at break is preferably between 2.0 N/25 mm and 10.0 N/25 mm. When the substrate is stretched 5 mm with the support body 7 attached to the substrate 1, the tensile strength at break is preferably between 2.5 N/25 mm and 9.0 N/25 mm. The tensile strength at break of the substrate can be calculated from the tensile force at break during the stretching process applied to the substrate. This value represents the upper limit of the force required to resist breakage during stretching. If the tensile strength at break is less than this value, the substrate may break during stretching.

In the medical tape of the present invention, the adhesive strength of the pressure-sensitive adhesive layer 2 between the substrate 1 and the release paper 3 is preferably greater than the adhesive strength of the slightly adhesive layer 6 between the silicone coating layer 5 and the support 7. This ensures that the tape can be peeled off the adhered object without detaching from the adhered object when the support is peeled off from the substrate after the tape has been attached. The adhesive strength of the pressure-sensitive adhesive layer 2 between the substrate 1 and the release paper 3 is preferably 1.0 N/25 mm to 7.0 N/25 mm, and the adhesive strength of the slightly adhesive layer 6 between the silicone coating layer 5 and the support 7 is preferably 0.01 N/25 mm to 0.5 N/25 mm.

In the medical tape of the present invention, the substrate 1 preferably extends in the direction of separating the support release sheet 10 while the support 7 is attached to the substrate 1, centered at the portion of the substrate 1 where the two support sheets 7 are joined, not separated from the support 7 at the butt joint 8. This is an essential feature of the present invention, intended to extend the substrate only near the wound or scar surface, limiting the stress, known as the shrinkage force, exerted by the substrate to the area near the wound or scar surface.

In the medical tape of the present invention, the contractile force achieved by applying a tensile force to the substrate 1 immediately after extending it by 5 mm, after removing the support release sheet 10, adhesive layer 9, support 7, slightly adhesive layer 6, and release paper 3 to expose the pressure-sensitive adhesive layer 2, is preferably between 0.10 N/25 mm and 3.0 N/25 mm. Furthermore, a contractile force of 0.20 N/25 mm to 2.0 N/25 mm is also preferred. The same value is also preferred for the contractile force immediately after extending it by 10 mm, when the tensile force reaches zero. This is because a weak contractile force loses its effect on the wound or inhibits the thickening, expansion, and elongation of the scar. Conversely, a strong contractile force, on the other hand, may cause side effects such as blisters, erosion, and redness. If the contractile force of the substrate is greater than the adhesive strength of the pressure-sensitive adhesive layer 2, the tape may become detached from the skin. If the contraction distance exceeds the above range, there is a possibility that an effective contraction force cannot be obtained for wounds or scars, or the belt may break and become unusable as a belt.

Next, an example application of the medical tape of the present invention described above will be described. First, the entire medical tape is folded into a mountain shape with the butt joint 4 of the release paper 3 as the vertex. The release paper 3 is separated from the butt joint 4. The shorter of the two separated release papers 3 is stretched distally, peeling it from the pressure-sensitive adhesive layer 2. The exposed portion of the pressure-sensitive adhesive layer 2 is then adhered to the adherend. Furthermore, the remaining longer release paper 3 is stretched distally, peeling it from the pressure-sensitive adhesive layer 2. The entire medical tape, along with the peeled and flipped release paper 3, is grasped and extended distally in the same longitudinal direction. At this point, the substrate 1 stretches, significantly opening the butt joint 8 of the support 7. While the opened butt joint 8 contacts the wound or scar to be healed, the remaining portion of the release paper 3 is adhered to the adherend. As a result, the contractile force of the substrate 1 acts only on the wound or scar surface contacted by the opened butt joint 8. Furthermore, because the release paper 3 is peeled from the center outward, the ends of the substrate 1 are not lifted or wrinkled, and remain firmly attached to the adherend. The entire medical tape is then gently pressed from above to flatten it, ensuring that the pressure-sensitive adhesive 2 is completely adhered to the adherend. The support release sheet 10, which has been separated from the butt joint 8 of the support 7, is then peeled off toward the ends, completing the application.

Example

Production of Medical Belts

In Figures 1 and 2, an acrylic adhesive is applied as a pressure-sensitive adhesive layer 2 on one side of a substrate 1 composed of a transparent polyurethane film with a length (L) of 50 mm, a width (W) of 25 mm, and a thickness of 7 μm. Furthermore, a release paper 3 (high-grade paper laminated with silicon-treated polyethylene) having a docking portion 4 is provided on the pressure-sensitive adhesive layer 2 at a distance of 15 mm from the end of the substrate 1. A silicon coating layer 5 is applied to the other side of the substrate 1 with a thickness of 3 μm. Furthermore, as a support 7, two pieces of transparent PET film are arranged so that a micro-adhesive layer 6 is adjacent to the silicon coating layer 5. The micro-adhesive layer 6 composed of an acrylic adhesive is applied to the two pieces of transparent PET film with a thickness of 5 μm. The two pieces of transparent PET film have a docking portion 8 approximately in the center of the substrate 1 in the position and shape shown in Figure 2. Furthermore, a support peeling sheet 10 with an adhesive layer 9 is provided on the support 7. The support release sheet 10 is provided in a range of 17.5 mm to 32.5 mm in the longitudinal direction from one end portion, and is provided with a cut in the same position and shape as the butting portion 8 .

Adhesion Test

Prepare respectively (i) the sheet material which removes the support peeling sheet 10, adhesive layer 9, support 7, slightly adhesive layer 6 and release paper 3 and exposes the pressure-sensitive adhesive layer 2, and (ii) the sheet material which removes the release paper 3, pressure-sensitive adhesive layer 2, substrate 1 and silicon coating layer 5 and exposes the slightly adhesive layer 6 from the medical tape made as described above. The exposed surfaces of the sheet material (i) which exposes the pressure-sensitive adhesive layer 2 and (ii) which exposes the slightly adhesive layer 6 are pasted on the bakelite board and left to stand at room temperature for 20 minutes. After standing, the end portions of the two exposed sheets are stretched at a tensile speed of 300mm/min using a tensile testing machine to measure the adhesion force (N/25mm) of each. The measurement is performed using 10 medical tapes, and the measurement results are represented by their average value.

Contraction Force Test

A medical tape was prepared with the pressure-sensitive adhesive layer 2 exposed as described above. Both ends of the tape were placed in a tensile testing machine (AGS-X, manufactured by Shimadzu Corporation). The tape was stretched and extended by 3 mm at room temperature. Thereafter, the tape was contracted using the tensile testing machine at a contraction rate of 300 mm/min. The force required to return the tape to its pre-stretched shape (contraction force (N/25 mm)) was measured. This measurement was performed on 10 pieces of medical tape, and the results are presented as the average value.

The measurement results of the adhesion test and the shrinkage force test are shown in Table 1 below.

[Table 1]

Adhesive force of the pressure-sensitive adhesive layer 2 2.76N/25mm Adhesion of slightly adhesive layer 6 0.056N/25mm 3mm shrinkage force of substrate 1 0.329N/25mm

As can be seen from Table 1, it was confirmed that the above-mentioned medical tape has suitable performance for wound treatment and for suppressing the thickening, enlargement, and extension of scars.

Fracture Test

Prepare a medical tape with a silicone coating, as described above, and a medical tape with an identical structure except for lacking the silicone coating. For each medical tape, remove the release paper 3 and place both ends in a tensile testing machine (AGS-X, manufactured by Shimadzu Corporation). Check whether each medical tape breaks while being stretched to 40 mm at tensile speeds of 300 mm/min, 400 mm/min, 500 mm/min, and 600 mm/min. Tensile tests were performed 20 times at each speed, and the number of fractures was expressed as the fracture frequency.

The results of the fracture frequency of the fracture test are shown in Table 2 below.

[Table 2]

Stretching speed 300mm/min 400mm/min 500mm/min 600mm/min Medical tape with silicone coating 0 times 0 times 0 times 1 time Medical tape without silicone coating 2 times 11 times 16 times 20 times

As shown in Table 2, the results show that medical tapes with a silicone coating exhibited little or no breakage at all stretching speeds compared to those without a silicone coating. The silicone coating reduces the peel force during stretching, eliminating any strain on the stretched portion. Furthermore, the silicone coating demonstrated the advantage of minimizing the risk of breakage during tape application.

Practical Trial on Inhibiting Scar Hypertrophy

Five subjects with wounds following skin sutures were assigned to a test. Three of the subjects had the medical tape produced as described above applied to the healed scars of the sutured wounds. Scar thickening, expansion, and stretching were assessed. Furthermore, the tape was applied with both ends stretched 5 mm, with the butt joint resting on the subject's scar. The tape was manually applied by the subjects once or twice a week. In all subjects, scar thickening was suppressed to a level that was barely detectable visually after 180 days of application.

On the other hand, for the other two subjects, the scars were treated in the same manner without utilizing the contractile force of the base material in the above-mentioned medical tape. In the evaluation 180 days after application, one of the subjects showed thickening, enlargement, and extension of the scar (formation of a keloid).

Possibility of industrial application

The medical tape of the present invention applies its base material's contractile force only to the area surrounding the wound or scar, without applying this force to the skin outside of that area. This allows for accelerated wound or scar healing while significantly reducing the burden on the skin during application. Furthermore, the base material's contractile force persists for extended periods of time, allowing for long-term use without replacement.

Description of Reference Numerals

1: substrate; 2: pressure-sensitive adhesive layer; 3: release paper; 4: butt joint; 5: silicone coating layer; 6: slightly adhesive layer; 7: support; 8: butt joint; 9: adhesive layer; 10: support release sheet; L: long side direction; W: width direction.

Claims (7)

1. A medical band, characterized in that it comprises a flexible substrate, release paper, and a peelable support, wherein the substrate is made of a plastic film or foil and is elastic, the release paper is adhered to one side of the substrate via a pressure-sensitive adhesive layer, a silicone coating layer and a micro-adhesive layer are sequentially formed on the other side of the substrate, the support is made of two plastic films and is adhered to the other side of the substrate via the silicone coating layer and the micro-adhesive layer, and the support is abutted to each other in the middle of the long side direction of the substrate and throughout the width direction of the substrate. 2. The medical strip as claimed in claim 1, characterized in that it further comprises a severable support peeling piece, the support peeling piece being composed of an adhesive plastic strip, the adhesive plastic strip being adhered to cover the mating portion of the support, the support peeling piece having a cut, the cut being formed in a shape and position substantially the same as the mating portion of the support. 3. The medical tape as described in claim 1 or 2, characterized in that the substrate is composed of a polyurethane film or foil with a thickness of 5 μm to 100 μm. 4. The medical band as described in claim 1 or 2, characterized in that the support is made of a PET film with a thickness of 20 μm to 120 μm. 5. The medical tape as described in claim 2, characterized in that the adhesion of the pressure-sensitive adhesive layer between the substrate and the release paper is greater than the adhesion of the micro-adhesive layer between the silicone coating layer and the support. 6. The medical tape as described in claim 1 or 2, characterized in that, in the state where the support is adhered to the substrate, with the portion of the substrate that is not separated from the support from the joint portion where the two support pieces are joined, an extension of the substrate is generated in the direction of stretching the support peeling piece during the process of stretching the substrate. 7. The medical bandage as described in claim 1 or 2, characterized in that it is used to inhibit or prevent scar thickening, enlargement or extension during the scar maturation process after wound healing.