JPH0740744U - Patch material - Google Patents

Abstract

(57) [Summary] [Structure] An adhesive layer is provided on one surface of a flexible 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 release paper is divided into parallel pieces so that both side edge portions and the central portion can be peeled off separately. In addition, the carrier sheet is also divided into parallel pieces that can be peeled off separately at both side edge portions and the central portion. The parallel pieces of the release paper and the parallel pieces of the carrier sheet are provided so as to cross each other. [Advantageous effects] Since the peeling order of the central piece of the release paper, the central piece of the carrier sheet, the both side edge pieces of the release paper, and the both side edge pieces of the carrier sheet can be changed, a flexible base material can be obtained. It can be surely applied even if the skin surface of the application site is wide, has unevenness, or has a device such as a catheter without giving wrinkles while giving an appropriate waist.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to a patch used for medical treatment.

[0002]

[Prior art]

 Conventionally, patch materials that have been used by sticking them to the surface of the skin, such as surgical dressing, catheter fixing sheet, wound covering sheet, drug transdermal administration sheet, etc., have uneven surface. In order to adapt well to this, since it repeatedly stretches and bends, a sheet-like base material with a high degree of flexibility is used to form an adhesive layer on this, and the adhesive layer is peeled off. The one covered with is peeled off and used.

However, since the base material is flexible as described above, it is not stiff as a whole and easily bends. Therefore, when the release paper is peeled off and attached, the adhesives adhere to each other. In many cases, it is difficult to paste them 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 the carrier sheet is affixed to the skin surface in the temporarily attached state. -Peeling is now done. However, since this carrier sheet is an ordinary sheet, it is difficult to apply it to the skin surface so that it adheres well to it, and the carrier may wrinkle. Often cannot be peeled off.

[0004]

[Problems to be solved by the device]

 Therefore, such a flexible base material of the adhesive patch can be applied accurately without wrinkling at a desired position on the skin surface or the like, and a release paper or carrier sheet can be used. It is intended to be easily removable.

[0005]

[Means for Solving the Problems]

 In the present invention, an adhesive layer of a flexible base material having an adhesive layer on one side is covered with a release paper, and a carrier sheet is temporarily attached to the other surface of the base material. Divide the edge and the central part into parallel pieces so that they can be separated separately, and also divide the carrier sheet into parallel pieces so that both edges and the central part can be separated separately. Then, the parallel pieces of the release paper and the parallel pieces of the carrier sheet are formed so as to cross each other.

[0006] In such an adhesive, by changing the order of peeling off the release paper and each piece of the central portion and both side edge portions of the carrier sheet, the skin surface of the application site is wide, uneven, catheter etc. Even if there are such equipment, it can be easily and surely applied without forming wrinkles on the base material having a flexible adhesive layer.

[0007]

【Example】

 Explaining examples below, the pressure-sensitive adhesive layer 2 is formed on one surface of the substrate 1. It is preferable that this base material is formed into a sheet having flexibility and has a necessary tensile strength capable of adhering well to the expansion and contraction and bending of the surface of the skin to which it is applied. 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 or the like can be preferably used, and it is usually about 10 to 60 μm, preferably about 10 μm. The thickness may be about 10 to 40 μ. Furthermore, as long as it has an appropriate moisture permeability, it is possible to prevent the adhered portion from becoming uneven.

The pressure-sensitive adhesive layer 2 may be made of an appropriate pressure-sensitive adhesive such as an acrylic type, a natural rubber type, a synthetic rubber type, or a silicone type, and may have a thickness of about 10 to 50 μm. In addition, it is preferable to use an acrylic adhesive because it is less irritating to the skin. The pressure-sensitive adhesive layer may be loaded with a transdermal absorbability, that is, a required amount of an appropriate drug that can be transdermally administered by mixing or coating.

The surface of the pressure-sensitive adhesive layer 2 is covered with a release paper 3, and such release paper may be a release sheet treated with a release agent on one side, a plastic sheet or other release sheet. It is recommended to use one that has a moderate waist strength.

A carrier sheet 4 is temporarily attached to the surface of the base material 1 opposite to the adhesive layer 2 so as to be peeled off. This carrier sheet should be more flexible than the above-mentioned base material, for example, polyethylene, polypropylene, polyester, polyamide, polyimide, plastic films such as those based on cellulose acetate, other films, and release-treated paper. Then, its thickness may be about 10 to 150 μm.

The release paper 3 is divided into two side edge portions and a central portion in parallel. In the illustrated one, cut lines 5 and 5 are provided in parallel at appropriate intervals from the side edges. The release paper is divided into side edge pieces 31 and 31 and a central piece 32 on both sides.

The carrier sheet 4 is also divided into two side edge portions and a central portion in parallel, and the two side edge portions and the central portion of the carrier sheet are parallel to each other. The two side edges and the central part which are parallel to each other are intersected with each other at right angles or at other suitable angles. In the illustrated example, a carrier sheet 4 is formed to be larger than the base material 1, cut lines 6, 6 are provided in parallel with each other at appropriate intervals from the side edges thereof, and the carrier sheet is provided on both side edges. It is divided into parts 41, 41 and a central piece 42. The cutting lines 6, 6 are located inside the side edges of the base material 1 and are orthogonal to the cutting lines 5, 5 provided on the release paper 3. ing.

If the base material 1 is transparent, the affected area can be seen through when it is attached, and at the same time, if the carrier sheet 4 is also transparent, the affected area is also attached. Is more preferable because it can be seen through. Such a patch 7 can be conveniently stored and used by enclosing it in an appropriate outer bag (not shown).

In this patch, first, the central piece 32 of the release paper 3 and the central piece 42 of the carrier sheet 4 are peeled off. Either of the central piece 32 and the central piece 42 may be peeled off first depending on the case. In this case, the central portion of the patch is only the base material 1 having the adhesive layer 2, but the peripheral edge portion of the base material 1 is the edge piece 41 of the remaining strong carrier sheet 4. , 41 and the side edge pieces 31, 31 of the release paper 3 are surrounded, so that if the peripheral edge portion is attached to the affected area or the like, the flexible base material 1 is wrinkled. Without needing to do so, it can be adhered neatly and closely to the desired skin surface irregularities such as the affected area and to devices such as catheters.

After the central portion of the base material is pasted in this manner, the edge pieces 41, 41 of the carrier sheet are peeled off, and then the side edge pieces 31, 31 of the release paper are peeled off in order to adhere the remaining side edge portions. When the agent layer is exposed and attached, the entire base material can be attached properly. Alternatively, the side edge pieces 31, 31 of the release paper may be formed by cutting the base material 1 inside thereof and discarding the side edge pieces 31, 31 to which a part of the base material 1 is attached. . The base material thus attached to the adhered portion reliably holds the attached state, and appropriately expands and contracts to adapt to the movement of the body.

As another method, first, the central piece 32 of the release paper 3 is peeled off, and the substrate 1 is provided with a proper waist by the side edge pieces 31, 31 and the carrier sheet 4. Hold both side edge pieces 31 and 31 in both hands and attach them to the skin surface of the affected area, etc. After that, peel off the center piece 42 and edge pieces 41, 41 of the carrier sheet 4 to make them fit to the skin surface, and finally It is also possible to remove the both side edge pieces 31 and 31 and stick the both side edge portions of the base material 1 to the skin surface, or to cut off the both side edge pieces to which the base material is adhered.

As still another method, first, the central piece 32 and both side edge pieces 31, 31 of the release paper 3 are first peeled off, and the base material 1 is provided with a waist by the carrier sheet 4. , The part of the carrier sheet 4 protruding laterally from the base material 1 is attached to the surface of the skin such as an affected area with both hands, and then the central piece 42 and the edge pieces 41, 41 of the carrier sheet 4 are attached. It can be used in various methods depending on the condition of the affected area, such as peeling off the skin to make it fit on the skin surface, and applying it after being attached.

In FIGS. 5 and 6, a cut line 51 is provided at the central portion of the central piece 32 of the release paper 3 and the central piece 32 is divided into two pieces 321 and 321. . When peeling off the central piece 32 of the release paper 3, this one bends the part of the cutting line 51 so that the part adjacent to the cutting line 51 is peeled off and the central part 3 is picked up. Since the two pieces 321 and 321 can be peeled off, they may be easy to use.

In FIG. 7, the cut line provided in the central piece 32 of the release paper 3 is a corrugated cut line 52. When the adhesive material 7 is bent, the corrugated cut line portion is the base material. Since it peels off from the adhesive layer and the convex portion 53 formed by this cutting line rises, it is easy to pick it up and the pieces 321 and 321 in the central portion of the release paper can be easily peeled off. The cutting line provided on the central piece of the release paper can be formed in an appropriate shape other than the straight cutting line 51 and the corrugated cutting line 52 described above. Further, the central piece 42 of the carrier sheet 4 can be divided into a plurality of pieces by providing a cutting line as in the above-mentioned release paper.

8 and 9, the release paper 3 and the adhesive layer 2 are provided at both ends of the cut lines 5 and 5 that divide the release paper 3 into the side edge pieces 31 and 31 and the central piece 32. A substantially V-shaped cut-out guide portion 8 penetrating the base material 1 and the carrier sheet 4 is provided. As described above, this is obtained by peeling off the central piece 32 of the release paper 3, the side pieces 41, 41 of the carrier sheet 4 and the central piece 42 in an appropriate order depending on the case, and the skin of the affected area or the like. After being attached to the surface, it has both side edge pieces 31 and 31 of the release paper left behind on the base material, and the inner end side of the side edge piece 31 formed by the cutting line 5 is By applying a substantially V-shaped cut-out guide portion 8 extending inward from the end, and gradually applying a force to the inside using this as a guide, the adhesive layer 2 is formed by the inner end side of this durable side edge piece. The part of the base material 1 having the side edges 31 attached to the side edge piece 31 is cut off. Then, if the side edge piece 31 and the base material 1 attached to the side edge piece 31 are discarded after cutting this, the required skin surface can be covered with the base material cleanly.

In addition to the above-mentioned V-shaped cut, the cut-out guide portion 8 may be a linear cut extending inward. It may be sufficient to provide the cut-out guide portion on the base material having at least the adhesive layer, and the cut-out guide portion does not ride on the cut line 5 and may be provided at a position slightly inward or outward. The same can be cut out as above.

10 and 11 show the side edges of the release paper 3 along the cut lines 5 and 5 that divide the release paper 3 between the side edge pieces 31 and 31 and the central piece 32. A cut guide portion 81 having a discontinuous cut line shape such as perforations penetrating the base material 1 having the pieces 31 and 31 and the adhesive layer 2 is provided. In the same manner as described above, this one has both side edge pieces 31 and 31 of the release paper left, and the inner edge side of the side edge piece formed by the cutting line 5 is used as the base material 1. While applying pressure to the inner edge of the cut guide portion 81 in the form of a discontinuous cut line, the portion of the base material attached to the side edge piece 31 is gradually removed from the cut guide portion 81. Since the pieces are cut off, if the side edge pieces 31 and the base material 1 attached to the side edge pieces 31 are discarded after the pieces are cut off, the pieces can be reliably attached to the skin surface such as the affected area. Further, the discontinuous cutting line-shaped cutting guide portion 81 can be sufficiently cut even if it is provided at a position overlapping the cutting line 5 or at a position slightly inside thereof.

As shown in FIG. 12, the gripping pieces 311, 311 are formed inside the side edge pieces 31, 31 of the release paper 3 and the gripping pieces 322, 322 are integrally formed on both sides of the central piece 32, respectively. When the above-mentioned respective pieces are to be peeled off, the release paper can be removed more easily by pinching the gripping pieces, and the same use can be made as described above. In addition, gauze, non-woven fabric, compressed cotton, a combination of these and others, and other patch 9 are placed in the center of the adhesive layer 2 of the base material 1. It can be applied to a wound or the like and is effective in treating wounds and other wounds. Further, such a patch material can be similarly provided to the above-mentioned various patch materials.

13 and 14, the release paper 3 has the same size as the base material, and is divided into three into side edge pieces 31 and 31 and a central piece 32 by cutting lines 5 and 5, and The carrier sheet 4 also has the same size as the base material and is provided with tabs 43, 43, 44 projecting outward from both end portions of the edge pieces 41, 41 and the central piece 42. Is used as a clue and is to be peeled off. Each of the above-mentioned tabs can be omitted as appropriate.

[0025]

[Effect of device]

 As described above, the present invention provides a flexible and easy-to-use base material that has a pressure-sensitive adhesive layer, without causing irregularities such as an affected area or creating wrinkles on the skin surface to which the device is attached. Since it can be affixed to the skin, it can be applied to surgeon dressing, wound covering sheet, wound healing sheet, catheter protective sheet, catheter fixing sheet, transdermal drug administration sheet. It can be widely used as various kinds of patches for other medical purposes.

[Submission date] July 13, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0023

[Correction method] Change

[Correction content]

In FIG. 12, the gripping pieces 311 and 311 are provided inside the green parts 31 and 31 on both sides of the release paper 3, and the gripping pieces 322 and 322 are integrally formed on both sides of the 01 piece 32, respectively. When the above-mentioned respective pieces are to be peeled off, the release paper can be removed more easily by pinching the gripping pieces, and the same use can be made as described above. This compound may be unchanged, but the central portion in the intended shown of the pressure-sensitive adhesive layer 2 the substrate 1, which further combination gauze, nonwovens, compressed cotton, these and others, other abutting member 9 has placed a Runode can be used by applying a patching material wound like, it is effective in the treatment of wounds and other wounds. And such a patch can be similarly provided to the above-mentioned various patch materials.

[Brief description of drawings]

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

FIG. 2 is a bottom view of FIG.

FIG. 3 is a front sectional view in which the thickness of FIG. 1 is enlarged.

FIG. 4 is a side sectional view in which the thickness of FIG. 1 is enlarged.

FIG. 5 is a plan view of another example.

6 is a front sectional view in which the thickness of FIG. 5 is enlarged.

FIG. 7 is a plan view of another example.

FIG. 8 is a bottom view of still another example.

9 is a bottom view of the state in which the release paper of FIG. 8 has been peeled off.

FIG. 10 is a bottom view of still another example.

11 is a front sectional view in which the thickness of FIG. 10 is enlarged.

FIG. 12 is an enlarged cross-sectional view of another embodiment.

FIG. 13 is a plan view of still another embodiment.

FIG. 14 is a bottom view of FIG.

[Explanation of symbols]

 1 Base Material 2 Adhesive Layer 3 Release Paper 31 Side Edge Piece of Release Paper 32 Central Piece of Release Paper 4 Carrier Sheet 41 Edge Piece of Carrier Sheet 42 Center Piece of Carrier Sheet 5, 6 Cutting line 51 Cutting line of the central piece 7 Adhesive material 8, 81 Cutting guide part 9 Patch material

Claims (4)

[Scope of utility model registration request] 1. A sheet-like base material having flexibility,
An adhesive layer is provided on one surface of the base material, the surface of the 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 and the release is performed. The paper and carrier sheet should be divided into parallel pieces that can be peeled off separately on both sides and in the center, so that the release paper and the carrier sheet should intersect with each other. The adhesive material formed on. 2. The base material provided with the pressure-sensitive adhesive layer is provided with a cutting guide portion extending inward from both end portions of the base material in the vicinity of a divided portion of the release paper divided into both side edge portions and a central portion. The patch according to 1. 3. The patch according to claim 1 or 2, wherein the release paper and / or the carrier sheet is further divided so that the central portion thereof can be divided into a plurality of pieces. 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.