JPH0738138U - Patch material - Google Patents

Abstract

(57) [Summary] [Structure] An adhesive layer is provided on one surface of a flexible sheet-shaped substrate, and the adhesive layer is covered with release paper. A carrier sheet, which is stronger than the base material, is temporarily attached to the other surface of the base material.
The carrier sheet is provided with a split that divides the carrier sheet into a plurality of pieces. The split has a suitable spacing to create a gap between the pieces. In addition, a mouthpiece may be provided in this split zone. [Effect] The release paper is peeled off, and the base material, which has a proper elasticity by the carrier sheet, is attached to the skin surface by the adhesive layer. In the carrier sheet, the split portion with a gap removes the distortion, and the carrier sheet can be easily picked from the split portion, the carrier sheet can be easily peeled off, and the base material can be securely attached without wrinkling. The applied patch can fully adapt to the movement of the skin.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a patch for medical use and the like.

[0002]

[Prior art]

 Conventionally, patch materials that have been used by sticking them to the surface of the skin such as surgical dressing, wound covering sheet, catheter protective sheet, drug transdermal administration sheet, and other skin surfaces have unevenness, and can be stretched or bent. In order to fit well to the skin surface that repeatedly occurs, a thin and highly flexible sheet-like base material is used, which is provided with an adhesive layer.

However, since the base material is highly flexible as described above, it is not stiff as a whole and easily bent, so that it is difficult to apply it well. Therefore, a carrier sheet, which is heavier than the base material, is temporarily attached to the surface of the base material opposite to the adhesive layer, and is attached to the skin surface in such a temporarily attached state, and then the carrier sheet is applied. I try to peel it off. However, since this carrier sheet is an ordinary single sheet, the carrier sheet cannot be peeled off smoothly, and the base material often has wrinkles, so there are still few satisfactory ones. .

[0004]

[Problems to be solved by the device]

 Therefore, it is easy to attach the carrier sheet to the surface of the skin while the carrier sheet is temporarily attached to the base material of the patch, and the carrier sheet can be easily picked and peeled off after the application, resulting in wrinkles in the base material. It is intended to be usable without any use.

[0005]

[Means for Solving the Problems]

 According to the present invention, a carrier sheet is temporarily attached to the other surface of a flexible substrate having an adhesive layer on one surface, and a split is provided to divide the carrier sheet into a plurality of pieces. Has an appropriate width so that there is a gap between adjacent pieces, and even if there is unevenness when sticking to the skin etc., this split part escapes and can be surely stuck. Further, the split portion is pinched so that the carrier sheet can be easily peeled off.

[0006]

【Example】

 Examples will be described below. A pressure-sensitive adhesive layer 2 is formed on one surface of a base material 1. This base material is formed into a sheet having flexibility, and has flexibility and elasticity. Therefore, it is preferable that the surface of the skin to be adhered is well adapted to the expansion and contraction and can be adhered, and the necessary tensile strength is obtained. Polyurethane film, polyvinyl chloride film, polyamide film, polyvinylidene chloride film, ethylene vinyl acetate film, and other films can be preferably used for these materials, and usually about 10 to 60 .mu.m, preferably about 10 .mu.m. The thickness is preferably about 40 to 40 μm, and the sticking part can be prevented from being stripped as long as it has an appropriate moisture permeability.

The pressure-sensitive adhesive layer 2 may be made of natural rubber-based, synthetic rubber-based, acrylic-based, or silicone-based pressure-sensitive adhesive, and may have a thickness of about 10 to 50 μm. It is preferable to use the pressure-sensitive adhesive of (1) because it causes less irritation to the skin. The adhesive layer may be loaded with a required amount of a drug having a transdermal absorbability, or may be applied and carried. The surface of the pressure-sensitive adhesive layer 2 is covered with a release paper 3 such as a release-treated paper or a plastic sheet. In the illustrated case, the inside of one small release piece 31 is folded outward and the other large release piece 31 is released. The piece 32 is formed so as to also overlap the folded portion 33.

A carrier sheet 4 is temporarily attached to the surface of the base material 1 opposite to the pressure-sensitive adhesive layer 2 in a peelable manner. This carrier sheet should be more flexible than the above-mentioned base material, for example, polyethylene, polypropylene, polyester, polyamide, polyimide, plastic film such as fibrin acetate, and other films, peeled paper, etc. Then, its thickness may be about 10 to 150 μm.

The carrier sheet 4 is provided with a split 5 so as to divide the carrier sheet 4 into a plurality of pieces, and by this split, a gap 51 having an appropriate interval is provided between the adjacent sheet pieces 41, 42. To form. In the illustrated example, a corrugated split 5 is provided in the center of the carrier sheet, and the width of this split, that is, the gap 51, is about 0.5 to 10 mm, preferably about 1 to 5 mm. If the gap is too wide, it may be bent at this portion and it may not be possible to give a proper stiffness to the entire base material, so that the adhesive layers may adhere to each other to cause wrinkles. Further, when the gap is relatively wide, it is possible to form the split by the two parallel cutting lines while leaving the carrier sheet in the portion corresponding to the gap.

If the base material 1 is transparent, the affected part can be seen through when it is attached, and at the same time, if the carrier sheet 4 is also transparent, the affected part can be seen when attached. Is more preferable because it can be seen through. Such a patch 6 can be conveniently stored and used by enclosing it in an appropriate outer bag (not shown).

In this patch, when one of the peeling pieces 31 is grasped and the other peeling piece 32 is picked up by pulling a finger into the folded-back portion 33, most of the adhesive layer 2 is exposed. Therefore, this is attached to a desired skin surface such as an affected area, and further, the folded portion 33 of the peeling piece 31 is pinched and peeled off, and the whole is attached. In this case, since the carrier sheet is still temporarily attached to the base material from which the peeling piece 32 has been peeled off, the flexible base material does not wrinkle, and the skin is surely held in a moderately elastic state. It can be attached to the surface, and even if the adherend is a curved surface or has irregularities, the split provided on the carrier sheet absorbs the distortion, so it can be attached with a chitin.

Since the carrier sheet temporarily attached to the pasted substrate is provided with a split having a gap of an appropriate width, the carrier sheet can be easily picked from the split portion. It can be peeled off by pulling it. The base material attached to the adherend retains its attachment state and expands and contracts appropriately to adapt to body movements.

In the structure shown in FIG. 3, the folded-back portion 35 is provided on the large peeled-off piece 34 of the release paper 3, and the small peeled-off piece 36 overlaps the folded-back portion 35. In this case, it is advisable to first peel off the small peeling piece 36 and attach this portion to the skin surface, then peel off the large peeling piece 34 and stick and fix the whole, and then peel off the carrier sheet. .

In FIG. 4, the split 5 provided on the carrier sheet 4 is formed linearly, and in FIG. 5, the linear split is formed obliquely. Further, in FIG. 6, linear splits are provided obliquely at the corners of the carrier sheet.

FIG. 7 shows a case where two linear splits are provided in parallel and the carrier sheet is divided into three sheet pieces 43, 44, 45, and when the patch is relatively large. The number of splits can be further increased according to circumstances.

In FIGS. 8 and 9, a tape-shaped mouthpiece 7 is further formed on the carrier sheet of the split zone 53, and the mouthpiece is a carrier sheet. It can be made by sticking an adhesive tape on the surface of a sheet, sticking a plastic or paper sheet with an adhesive, an adhesive, a double-sided tape, etc., or by heat-sealing it. The sheet can be peeled off more easily. Further, if the mouthpiece is colored differently from the carrier sheet, the position of the split can be seen at a glance and it becomes easier to use.

FIG. 10 shows a state in which the split side portion 71 of the mouthpiece 7 is bonded to the carrier sheet 4 and the portion 72 apart from the split is not bonded. This non-bonded portion 72 It is easy to pick and the carrier sheet can be peeled off easily, so it is easy to use even if the split gap is narrow.

In the structure shown in FIG. 11, the mouthpiece 7 is formed so as to project toward the gap 51 of the split, and the portion 73 projecting above the gap 51 can be picked to facilitate the carrier sheet. Can be removed. In addition, in FIG. 12, the carrier sheet of the split portion is folded back to both sides to form the mouthpiece 7, and the folded portion 74 may be left folded, or the carrier sheet may be adhered or heat-sealed. It can be attached as it is to the sheet side, or other tape such as plastic or paper can be attached. In some cases, the carrier sheet of the split portion may be folded back only on one side, and the mouthpiece may be provided on only one side. Any of these can be suitably used when the split gap provided in the carrier sheet is relatively wide.

The adhesive material of FIG. 13 is one in which a non-woven fabric, compressed cotton, gauze or other patch 8 is placed on the pressure-sensitive adhesive layer of the substrate, and the patch is used by abutting against a wound or the like. It can be effectively used for the treatment of wounds and other wounds.

[0020]

[Effect of device]

 INDUSTRIAL APPLICABILITY As described above, the present invention 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. It can be widely used as a medical adhesive sheet, a catheter protective sheet, a catheter fixing sheet, a transdermal drug administration sheet, a poultice, a penetrating adhesive, and various other medical patch materials. .

[Brief description of drawings]

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

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

FIG. 3 is an enlarged cross-sectional view of another example.

FIG. 4 is a plan view of another example.

FIG. 5 is a plan view of still another example.

FIG. 6 is a plan view of another example.

FIG. 7 is a plan view of still another example.

FIG. 8 is a plan view showing another example.

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

FIG. 10 is a sectional view showing another example in which the thickness is enlarged.

FIG. 11 is a cross-sectional view in which the thickness is enlarged to show still another example.

FIG. 12 is a cross-sectional view in which the thickness of another example is enlarged.

FIG. 13 is an enlarged cross-sectional view showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base material 2 Adhesive layer 3 Release paper 4 Carrier sheet 5 Split 51 Gap 6 Adhesive material 7 Mouthpiece 8 Patch material

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomio Hayashi 1713 Zenmonbashi, Minomachi, Awa-gun, Asakura-gun, Fukuoka Prefecture Nichiban Medical Co., Ltd. Zenmonbashi 1713 Nichiban Medical Co., Ltd.

Claims (4)

[Scope of utility model registration request] 1. A sheet-like base material having flexibility,
A pressure-sensitive adhesive layer is provided on one surface of the base material, the surface of the pressure-sensitive adhesive layer is covered with release paper, and a carrier sheet which is stronger than the base material is temporarily attached to the other surface of the base material. An adhesive material in which a split is provided to divide the sheet into a plurality of pieces, and the split is formed to have an appropriate width so that there is a gap between adjacent carrier sheet pieces. 2. The patch according to claim 1, wherein a split piece is sandwiched between the split sheets of the carrier sheet so as to sandwich the split. 3. The patch according to claim 2, wherein the mouthpiece has a color different from that of the carrier sheet. 4. The patch according to any one of claims 1 to 3, wherein a patch that contacts the affected area is placed on the adhesive layer of the base material.