JPH09154872A - Medical sticking material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To paste a flexible and sheet type medical sticking material tightly to a lesion or the like, and prevent the lesion or the like from being contaminated with bacteria. SOLUTION: An adhesive layer 2 formed on one side of a flexible sheet type substrate 1 is covered with released paper 5. Also, a carrier sheet 6 stiffer than the substrate 1 is temporarily fitted to the other side of the substrate 1. In addition, an active area 3 for contact with a lesion or the like is formed approximately on the center of the substrate 1. The carrier sheet 6 has a split 7 for the division thereof into a plurality of pieces at a position off the active area 3. As a result, the substrate 1, even when separated from the released paper 5 for application, is protected with the carrier sheet 6 and not wrinkled. Furthermore, the carrier sheet 6 can be easily peeled off, using the part of the split 7. Also, even if the substrate 1 is finely damaged at the time of punching the carrier sheet 6 for forming the split 7, the active area 3 is not contaminated with bacteria or the like, as the position of the split 7 is off the active area 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical patch that is preferably used for covering wounds and the like.

[0002]

2. Description of the Prior Art Conventionally, medical patch materials such as surge dressing, wound covering sheet, catheter protective sheet, drug transdermal administration sheet and other medical patch which are used by sticking to the skin surface are
Although an adhesive layer is provided on one side of the base material and applied, the skin surface has irregularities and expansion and contraction and bending occur repeatedly, so if the base material lacks flexibility, it will not fit well on the skin surface. , Will come off immediately. Therefore, in general, a thin and highly flexible sheet-like film material is widely used as the substrate.

However, since the base material made of the thin and highly flexible film material as described above is not stiff as a whole and easily bends or wrinkles, it is applied well. It's very difficult to do. Therefore, a carrier sheet having a rigidity higher than that of the base material is temporarily attached to the surface of the base material opposite to the pressure-sensitive adhesive layer, and the base material is attached to the skin surface in the temporarily attached state. In addition, the carrier sheet is peeled off, but since this carrier sheet is formed of one sheet, it is difficult to peel it off easily, and when peeled off unnecessarily, the base material has wrinkles. There are many things, and there are still few things to be satisfied.

In consideration of the above situation, the carrier carrier
It is also proposed to provide a split on a part of the base to form a cue for peeling, but when forming the split by punching only the carrier sheet, it is invisible to the base material There is a risk of causing minute damage such as scratches and pinholes, and if such damage occurs on the covered surface of the affected area, there is a risk that the affected area will be contaminated with bacteria etc. through the pinhole, etc. There was a problem in terms of sex.

[0005]

An object of the present invention is to provide a medical patch, in which a carrier sheet is temporarily attached to a base material, and the carrier sheet can be easily peeled off after application.
The purpose of the present invention is to provide a medical patch that can be used without wrinkling in the base material and on which the risk of contaminating the affected area does not occur even if the base material has minute damage.

[0006]

According to the present invention, an adhesive layer is provided on one side, and a carrier sheet is provided on the other side of a flexible base material having an active surface for covering the affected area at the center thereof. Provided is a medical patch, which has a split that is temporarily attached and divides the carrier sheet into a plurality of pieces, and the split is provided at a position distant from the working surface, and is provided on the skin or the like. The carrier sheet can be easily peeled off by pinching the split portion when sticking, and when the split portion is formed, fine pinholes or the like may be generated on the base material. The affected area can be protected from infection such as bacteria.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION A substrate (1) on one side of which an adhesive layer (2) is formed will be described in detail with reference to the accompanying drawings.
Is formed of a sheet, is flexible and stretchable, and is well adapted to the stretch and contraction of the surface of the skin to which it is adhered, and is made of a material having a required tensile strength. As such a material, 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 the thickness thereof is usually about 10
The thickness is preferably about 60 to 60 μm, preferably about 10 to 40 μm, and it is more preferable if it has appropriate moisture permeability so that the sticking portion can be prevented from being stripped.

The pressure-sensitive adhesive layer (2) is made of a natural rubber-based, synthetic rubber-based, acrylic-based, silicone-based, polyvinyl alcohol-based pressure-sensitive adhesive or the like and has a thickness of about 10 to 50.
It is preferable to set it to about μ, and it is particularly preferable to use an acrylic pressure-sensitive adhesive because it causes less irritation to skin. A drug having a transdermal absorbability may be mixed in or applied to the pressure-sensitive adhesive layer to carry the drug.

A working surface (3) for covering the affected area is formed in the central portion of the base material (1). On this working surface,
When non-woven fabric, compressed cotton, gauze or other patch material (4) is provided, it can be used effectively for treating wounds or other materials by contacting the affected area such as a wound, but if no such material is provided Also, it can be configured so that only the action surface has a medicinal effect.

The surfaces of the pressure-sensitive adhesive layer (2) and the backing material (4) are covered with release paper (5) such as release-treated paper or plastic sheet, as shown in FIG. The inside of the small peeling piece (51) is folded outward, and the other large peeling piece (52) is formed so as to overlap this folded portion (53). As shown in FIG. The folded-back portion (53) may be provided at the inner end of the 52 so that the small peeling piece (51) overlaps the folded-back portion (53).

A carrier sheet (6) is temporarily adhered to the surface of the base material (1) opposite to the adhesive layer (2) in a peelable manner. This carrier sheet is made of a material having rigidity lower than that of the above-mentioned base material, and examples thereof include plastic films such as polyethylene, polypropylene, polyester, polyamide, polyimide, and acetic acid fibrin base, and other films,
It is made of peeled paper and has a thickness of about 10
About 150 μm is preferable. To temporarily attach the base material to the carrier sheet, for example, a material of the base material such as polyurethane is coated on the carrier sheet in a molten state, or
Casting in a molten state is sufficient.

The carrier sheet (6) has a plurality of pieces separated from the working surface (3) of the base material (1) by punching out only the carrier sheet. Is provided with a split (7) which is preferably divided by the split (7).
The narrow carrier sheet between the sheet pieces is removed so as to form an appropriate gap (71) between (61) and (62). The split shown in FIG. 1 is formed in a corrugated shape, and the width thereof, that is, the gap (71), is about 0.5 to 10 mm,
It is preferably about 1 to 5 mm. If this gap is too wide, the base material is easily bent at this portion, and it becomes impossible to give a proper rigidity to the whole base material, and the adhesive layers may adhere to each other to cause wrinkles. It should be noted that the number of the above-mentioned splits may be plural at appropriate positions depending on the size of the substrate.

The base material (1) can be formed in various colors, patterns, etc., but it is preferable that the base material (1) is transparent and transparent, and if so, the affected area can be seen through when it is applied. be able to. At the same time, if the carrier sheet is also transparent and colorless, the affected area can be seen through even when it is attached, which is more preferable. It should be noted that it may be colored and transparent. It is convenient to store and use the adhesive material (8) configured as described above by enclosing the adhesive material (8) one by one in an appropriate outer bag (not shown).

In order to use the above-mentioned patch, one of the peeling pieces (51) is grasped at the folded-back portion (53) of the peeling piece (51), and the other peeling piece (52) is picked up and pulled. Since the working surface (3) provided with the layer and the pad (4) is exposed,
Affixed to the skin surface so that the working surface contacts the affected area,
After that, the entire folded back portion (53) of the peeling piece (51) is pinched and peeled off, and the whole is attached. At this time, since the carrier sheet is still temporarily attached to the base material from which the peeling piece (52) has been peeled off, there is no wrinkle on the flexible base material as described above, and it is appropriate. It can be firmly attached to the skin surface with the waist tight, and even if the adherend surface is curved or has irregularities, the distortion of the split is absorbed in the carrier sheet, so it is perfect. Can be pasted.

At the time of sticking, in the sticking material shown in the figure, the carrier sheet temporarily attached to the base material is provided with a split having a gap of an appropriate width at a position distant from the working surface. The carrier sheet can be easily picked from the split portion and is easily peeled off. In addition, as shown in FIG. 3, when the folded-back part (53) is provided on the large peeling piece (52) of the peeling paper (5), the small peeling piece (51) is peeled off first, and this portion is removed from the skin. Affix to the surface, then a large strip (5
2) Peel off and attach the whole, then fix it, and then
It is good to peel off.

The shape of the above-mentioned split can be variously configured. For example, it can be formed in a straight line as shown in FIG. 4 or can be formed obliquely (FIG. 5), or can be formed in a corner portion of the carrier sheet. It can be provided diagonally (FIG. 6). Further, as shown in FIG. 7, two linear splits are provided in parallel on both sides of the working surface, and a carrier sheet is provided with three sheet parts (61), (62). , (63), which can be conveniently used when the patch is relatively large.

In FIGS. 8 and 9, a tape-shaped mouthpiece (9) is further formed on the carrier sheet of the split zone (72) provided along one side of the carrier sheet. Examples are given. As the mouthpiece (9), an adhesive tape is attached to the surface of the carrier sheet, or a sheet of plastic such as polyester or paper is attached with an adhesive, an adhesive, a double-sided tape, or the like. The carrier sheet can be more easily peeled off from the split by using this mouthpiece as a clue. Further, if the mouthpiece piece (9) is colored differently from the carrier sheet, the position of the split can be seen at a glance, and it becomes easier to use.

As described above, when the mouthpiece is provided along one side of the carrier sheet, the carrier sheet is manufactured at the time of manufacturing.
When the tongue is wound up, the side provided with the mouthpiece becomes thick and the left and right balance is lost, and it becomes impossible to perform a clean cutting operation or a winding operation. Therefore, in the figure, on the other side of the split zone, an attachment piece (10) is formed corresponding to the above-mentioned edge piece to make the left and right thicknesses of the carrier sheet substantially uniform. 10) is made transparent to make it inconspicuous.

In the embodiment shown in FIG. 10, the edge piece (9) is adhered to the carrier sheet at the split side portion (91) and the portion (92) away from the split is not adhered. So, the non-adhesive part (92) is easy to pick,
Since it can be easily peeled off from the carrier sheet, it can be easily used even if the split gap is narrow. Further, as shown in FIG. 11, when the mouthpiece (9) is formed so as to project toward the gap (71) of the split (7), the portion (93) projecting above the gap (71) is formed. By picking, carrier
It can be easily peeled off.

In the above embodiment, the mouthpiece is used as a carrier sheet.
Although it is formed of a separate member from the
It is also possible to fold the edges of the split portions outwardly to form a mouthpiece (9) integral with the carrier sheet. In this case, the folded-back portion (94) may be left as it is, but it may be attached to the carrier sheet side with an adhesive or a heat seal, or another tape such as plastic or paper may be attached thereon. Good. The mouthpiece piece integrally formed with the carrier sheet as described above may be provided only on one edge of the split portion.

[0021]

EFFECTS OF THE INVENTION The present invention is configured as described above, and can be easily applied to the skin surface of an affected area or the like, and the carrier sheet can be easily peeled off, so that the treatment can be smoothly performed, and it can be contacted with the affected area. Since the split is formed while avoiding the action surface, when the carrier sheet is punched out to produce the split, even if fine scratches or pinholes may be generated on the base material, the action surface is bacteria. It can be kept in a clean state without being contaminated by etc. and can be used as a surgical dressing, wound covering sheet, wound healing sheet, catheter protective sheet, catheter fixing sheet. It can be variously applied as a medical patch, a transdermal drug administration sheet, a poultice, a penetrating adhesive and other medical patches.

[Brief description of the drawings]

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

FIG. 2 is an enlarged cross-sectional view with a part omitted in which the thickness of FIG. 1 is enlarged.

FIG. 3 is a partially omitted enlarged cross-sectional view showing an enlarged thickness of another embodiment.

FIG. 4 is a plan view showing another embodiment.

FIG. 5 is a plan view showing still another embodiment.

FIG. 6 is a plan view showing another embodiment.

FIG. 7 is a plan view showing another embodiment.

FIG. 8 is a plan view showing still another embodiment.

9 is a partially omitted enlarged cross-sectional view in which the thickness of FIG. 8 is enlarged.

FIG. 10 is a partially omitted enlarged cross-sectional view showing an enlarged thickness of another embodiment.

FIG. 11 is a partially omitted enlarged cross-sectional view showing an enlarged thickness of still another embodiment.

FIG. 12 is a partially omitted enlarged cross-sectional view showing another embodiment in which the thickness is enlarged.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base material 2 Adhesive layer 3 Working surface 4 Patch material 5 Release paper 6 Carrier sheet 7 Split 8 Adhesive material 9 Orbital piece 10 Attachment

Claims (6)

[Claims] 1. A sheet-like base material having flexibility,
A pressure-sensitive adhesive layer is provided on one surface of the base material, a working surface for covering the affected area is formed in the center of the surface of the pressure-sensitive adhesive layer, and the entire surface is covered with release paper. A medical use characterized in that a stiff carrier sheet is temporarily attached, a split is provided to divide the carrier sheet into a plurality of parts, and the split is provided at a position apart from the working surface of the base material. Adhesive material. 2. The medical patch according to claim 1, wherein a patch that contacts the affected area is placed on the working surface of the pressure-sensitive adhesive layer of the base material. 3. The medical patch according to claim 1, wherein the split has an appropriate width so as to form a gap between adjacent carrier sheet pieces. 4. The medical patch according to any one of claims 1 to 3, wherein a mouthpiece is formed in the split zone of the carrier sheet with the split interposed therebetween. 5. The medical patch according to claim 4, wherein the mouthpiece is formed in a color different from that of the carrier sheet. 6. The split zone is provided along one side of the carrier sheet, and an attachment piece is formed on the other side of the carrier sheet corresponding to the mouthpiece. Item 4. The medical patch according to Item 4 or 5.