JPH0737134U - Medical patch - Google Patents

Abstract

(57) [Summary] [Structure, Function] A pressure-sensitive adhesive layer 2 is provided on one surface of a sheet-like base material 1 which is thin and has flexibility and stretchability, and the pressure-sensitive adhesive layer is covered with a release paper 3. Further, the adhesive tape 4 having the tape adhesive layer 6 provided on one surface of the tape base material 5 is prepared. The adhesive tape 4 is applied to the base adhesive layer 2 at least at one side edge of the base.
The tape pressure-sensitive adhesive layer 6 is stuck between the release paper 3 and the release paper 3 toward the release paper 3. The adhesive tape 4 is strongly adhered to the release paper 3, and the release paper 3 is peeled off from the base adhesive layer 2. When the adhesive tape 4 reaches the strip, it becomes difficult to remove the base paper while holding the release paper. Can be kept in a stretched state. This makes it a thin, flexible and stretchable sheet.
The tongue-shaped base material can be easily and surely applied to the skin surface such as an affected area.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a medical patch.

[0002]

[Prior art]

 Conventionally, medical patch materials such as surgical dressing, wound covering sheet, catheter protective sheet, transdermal drug delivery sheet, and other medical patches that have been used by sticking to the skin surface have irregularities and expand and contract. A sheet-like base material that is thin and highly flexible and stretchable is used so that it will fit well on the skin surface where repeated bending and flexion occur. It is temporarily attached to the release paper.

Since such an adhesive is applied to an affected area such as a site to be operated, it is flexible and has no rigidity when peeled from a release paper. Therefore, it is necessary to support the periphery of the adhesive to keep it in an expanded state. For example, it cannot be used because it rolls up or the adhesive layers stick together.

For this reason, a commonly used patch is provided with an edge strip having an appropriate width at the opposing edges of the base material temporarily attached to the release paper, and the edge strip is used when peeling the release paper. Two people hold it and keep it in an expanded state, the other person peels off the release paper to expose the adhesive layer, and the two people holding the edging piece stick it on the affected area etc. in an expanded state. It took at least three people to apply such a patch, and it was very inefficient. Since then, various proposals have been made for facilitating attachment to such an affected area, but few are still sufficiently satisfactory.

[0005]

[Problems to be solved by the device]

 Therefore, the release paper is peeled off smoothly from the patch, and the flexible and stretchable base material is kept in a stretched state while holding the release paper without attaching the adhesive layers. Therefore, it is intended to be able to surely and easily attach it to the treatment site and other affected areas with a little effort.

[0006]

[Means for Solving the Problems]

 In the present invention, a pressure-sensitive adhesive layer is provided on one side of a thin, flexible and stretchable base material, and the surface of the pressure-sensitive adhesive layer is covered with a release paper. Also, prepare an adhesive tape provided with a tape adhesive layer on one side of the tape substrate, and use this adhesive tape at least at one side edge of the substrate between the adhesive layer of the substrate and the release paper. Adhere the tape adhesive layer with the adhesive layer facing the release paper.

[0007] Then, by strengthening the sticking action in the adhesive tape strip, the release paper is peeled off from the adhesive layer of the base material, and when the adhesive tape strip on the side edge of the base material is reached, the release paper is difficult to peel off. However, by holding the release paper in your hand and pulling it, the base material with the adhesive layer can be kept in a stretched state, which allows easy and reliable attachment to the affected area such as the treatment area. To do so.

[0008]

【Example】

 Examples will be described below. A pressure-sensitive adhesive layer 2 is formed on one surface of a base material 1. The base material is a thin sheet having flexibility and stretchability, and is applied to the skin to be applied. It is preferable that it can adapt to the expansion and contraction of the surface and can be adhered well, and that it has the necessary tensile strength. For such a substrate, for example, a polyurethane film, a polyvinyl chloride film, a polyamide film, a polyvinylidene chloride film, an ethylene vinyl acetate film and other films can be preferably used, and usually about 10 to 60 μm, preferably 10 to 60 μm. It is preferable to set the thickness to about 40 μm. Furthermore, if it has an appropriate moisture permeability, it is possible to prevent the sticking portion from becoming uneven. Further, if the base material 1 is transparent, it is more preferable that the affected area and the like can be seen through during and after application.

The pressure-sensitive adhesive layer 2 may be made of an appropriate pressure-sensitive adhesive such as a natural rubber type, a synthetic rubber type, an acrylic type, or a silicone type, and may have a thickness of about 10 to 50 μm. Further, it is preferable to use an acrylic adhesive since it is less irritating to the skin. Depending on the case, the required amount of the transdermally absorbable drug may be mixed in or applied to the pressure-sensitive adhesive layer to carry it. The surface of the pressure-sensitive adhesive layer 2 is covered with a release paper 3 which is stronger than the above-mentioned base material such as release-treated paper or plastic sheet.

An adhesive tape 4 is interposed between the pressure-sensitive adhesive layer 2 of the base material 1 and the release paper 3 and attached to one side edge or both side edges of the base material 1. The adhesive tape 4 has a tape adhesive layer 6 provided on one surface of a tape substrate 5, and the tape adhesive layer 6 is attached to the release paper 3. For this tape base material, various plastic films, papers and other appropriate materials can be used, and as the tape adhesive, various adhesives can be used like the adhesive of the adhesive layer of the above base material.

In this medical patch 7, the sticking action of the base adhesive layer 2 on the release paper 3 [B]; the sticking action of the tape adhesive layer 6 on the release paper 3 [P]; When the sticking action of the pressure-sensitive adhesive layer 2 on the tape substrate 5 is [A]; and the anchoring action of the pressure-sensitive adhesive layer 2 on the substrate 1 is [K]; [B] <[A], [K] , [P], the release paper 3 peeled off from the pressure-sensitive adhesive layer 2 of the base material 1 is hard to be peeled off in the zone of the pressure-sensitive adhesive tape 4 on the side edge of the base material.

In the illustrated example, a 25 μm-thick acrylic pressure-sensitive adhesive layer 2 is formed on one surface of a substrate 1 made of a polyurethane film having a 30 μm-thickness and having moisture permeability and transparency. The release paper 3 is a paper base material 31 on one surface of which a release agent layer 32 of polymethylsiloxane is provided. The adhesive tape 4 comprises a tape base material 5 made of polyethylene terephthalate film and a tape adhesive layer 6 made of a silicon-based adhesive provided on one surface thereof. The adhesive tape 4 is provided on both side edge portions of the base material 1, the release paper 3 is a central portion, and the arcuate portion 81 protruding laterally and the cutting line 8 that draws a substantially wavy line by the straight portion 82 Although it is divided into two, it can be divided by a straight line, a diagonal line, or a cutting line of an appropriate shape.

When this medical patch 7 is bent at the part of the cutting line 8, the arcuate portion 81 comes to be peeled off from the adhesive layer 2 of the base material 1. Therefore, holding both of these arcuate portions 81 When pulled, the release paper 3 is further peeled off to both sides, and it stops reaching the part of the adhesive tape 4 so that the state shown in FIG. 3 is obtained. Therefore, holding the release paper with both hands and holding the adhesive layer 2 on the substrate. 1 can be held in a stretched state by pulling it with a pin, and can be reliably and easily attached to a desired skin surface such as an affected area without wrinkles.

After sticking in this way, the release paper 3 and the adhesive tape 4 can be removed by cutting the base material 1 with scissors along the inside of the adhesive tape 4 described later. In this case, as shown in FIG. 4, when the base material 1 having the adhesive layer 2 is provided with discontinuous cut lines 9 such as perforations along the inside of the adhesive tape 4, the release paper 3 and the adhesive tape are attached. It becomes easier to remove the cap 4.

The medical patch 7 can be formed so that [B] <[K] <[A], [P]. In the case of the sheet thus formed, when the release paper 3 is held and pulled in the same manner as described above, the release paper 3 is peeled from the adhesive layer 2 of the base material 1 and once the peeling to the adhesive tape 4 portion is stopped. Therefore, the base material 1 having the adhesive layer 2 is kept in a stretched state by pulling it with a pin, and it can be easily and securely applied to a desired skin surface such as an affected area without wrinkles, by itself. be able to. Since [K] is smaller than [A] and [P], when the release paper 3 is further pulled strongly, it is peeled between the base material 1 and the adhesive layer 2, and the state shown in FIG. Can be applied to the desired skin surface such as the affected area.

The medical patch 7 can be formed so that [B] <[A] <[P], [K]. In the case of the sheet thus formed, when the release paper 3 is held and pulled in the same manner as described above, the release paper 3 is peeled from the adhesive layer 2 of the base material 1 and once the peeling to the adhesive tape 4 portion is stopped. Therefore, the base material 1 having the adhesive layer 2 is kept in a stretched state by pulling it with a pin, and it can be easily and securely applied to a desired skin surface such as an affected area without wrinkles, by itself. be able to. Since the above [A] is smaller than [P] and [K], when the release paper 3 is further strongly pulled, the space between the adhesive layer 2 of the base material 1 and the tape base material 5 of the adhesive tape 4 is increased. The adhesive layer 2 may be peeled off and attached to a desired skin surface such as an affected area in a state where the pressure-sensitive adhesive layer 2 is present also on the side edge portion shown in FIG.

As shown in FIG. 7, the adhesive tape 4 is provided on one side edge of the base material 1, and the adhesive layer 2 on the other side edge is not adhesive to the release paper 3. A flexible tape is attached to the pressure-sensitive adhesive layer 2 to form the mouthpiece 10. If this adhesive material is picked up and peeled off the tab 10 and the release paper 3, it will reach the portion of the adhesive tape 4 and the peeling will be suppressed in the same manner as described above, and it will be used in the same manner. be able to.

[0018]

[Effect of device]

 As described above, according to the present invention, the adhesive tape having the tape adhesive layer provided on the tape base material is interposed between the adhesive layer of the base material and the release paper, and the adhesive tape is peeled off to reach this adhesive tape portion. Since peeling of the paper is suppressed and the base material can be held in a stretched state by holding the release paper, the base material having the adhesive layer can be surely and easily attached to the skin surface such as the affected area without wrinkling. The treatment can be given smoothly. This is a surgical dressing, wound covering sheet, wound healing sheet, catheter protective sheet, catheter fixing sheet, transdermal drug administration sheet and other medical treatments. It can be widely used as an adhesive material for use.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of FIG.

FIG. 3 is a partially omitted enlarged cross-sectional view showing a state in which the release paper of FIG. 1 is partially removed.

FIG. 4 is a partially enlarged sectional view showing a modified example of FIG.

FIG. 5 is an enlarged cross-sectional view of another example in which the release paper and the adhesive tape are peeled off.

FIG. 6 is an enlarged cross-sectional view of another example in which a release paper and an adhesive tape are peeled off.

FIG. 7 is an enlarged cross-sectional view of still another example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base material 2 Adhesive layer 3 Release paper 4 Adhesive tape 5 Tape base material 6 Tape adhesive layer 7 Medical patch 8 Cut line 10 Oral piece

Front page continuation (72) Terumi Terukawa, Inventor Terumi Mikawa, 2-4, 9-2, Mindan, Chiyoda-ku, Tokyo Nichiban Co., Ltd.

Claims (3)

[Scope of utility model registration request] 1. A thin base material having flexibility and stretchability, wherein a pressure-sensitive adhesive layer is provided on one surface of the base material, and the surface of the pressure-sensitive adhesive layer is covered with a release paper. The tape adhesive layer of an adhesive tape having a tape adhesive layer on one surface of the tape substrate between the release paper and the adhesive layer at one edge is pasted with the tape adhesive layer facing the release paper, The adhesive action of the agent layer on the release paper [B];
[P] the sticking action of the tape adhesive layer to the release paper; [A] the sticking action of the base adhesive layer to the tape base; [K] the anchoring action of the adhesive layer to the base; The adhesive patch for medical treatment in which the adhesive tape portion, in which [B] <[A], [K], and [P], is formed so as not to be easily peeled off. 2. The above [B], [P], [A], [K]
The adhesive patch for medical use according to claim 1, wherein: [B] <[K] <[A], [P]. 3. The above-mentioned [B], [P], [A], [K]
The adhesive patch for medical use according to claim 1, wherein: [B] <[A] <[P], [K].