JP4262934B2 - Sheet patch - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a sheet-like patch used for keeping a liquid or cream-like drug in contact with a part of the human skin for a long time, and in particular, a three-dimensional shape such as a heel, elbow, knee or shoulder. It is related with the sheet-like sticking tool used for the part which exhibits.
[0002]
[Prior art]
As a means for keeping a drug in contact with a part of human skin for a long time, a sheet-like patch is used. JP-A-2000-302640 discloses a conventional sheet-like patch, in which a paste is laminated on the surface of a nonwoven fabric, and an adhesive sheet having a shape extending from the periphery of the nonwoven fabric is laminated on the back surface of the nonwoven fabric. The structure of the sheet-like pack which laminated | stacked the peeling sheet for protection on the surface of is disclosed.
[0003]
With this configuration, since the adhesive sheet in a state of extending from the periphery of the nonwoven fabric laminated with the plaster serving as the pack body is provided in a laminated form on the back surface of the nonwoven fabric, the pack is surely heeled regardless of the adhesive strength of the plaster. Adhesive retention is held at the affected area such as plasters, and without any increase in the adhesive strength of the plaster, the presence of the adhesive sheet ensures that the heel, elbows, knees, shoulders, etc. are easily peeled off and can be applied to the affected skin. It is said that there will be no problems remaining on the skin of the body.
[0004]
[Problems to be solved by the invention]
However, in the conventional sheet-shaped pack disclosed in JP-A-2000-302640, the plaster body is merely laminated on the surface of the nonwoven fabric and is not impregnated inside the nonwoven fabric, so that the adhesive strength is exerted on the plaster body. If the ingredient to be included is contained, the moisturizing power of the plaster decreases due to the adhesive component, and the moisturizing effect of the drug cannot be fully exhibited, and sufficient protection and improvement effects cannot be given to the skin. There is.
[0005]
In addition, when a plaster that exhibits a sheet shape having a certain degree of adhesive strength is used in the conventional sheet-like pack, the plaster adheres to the surface of the nonwoven fabric on the back surface and exhibits a three-dimensional shape such as wrinkles There is a problem in that wrinkles are generated by being bent when used in skin, and adhesion to the skin is impaired.
[0006]
Furthermore, the conventional sheet-like pack is formed by laminating a protective release sheet, a paste, a nonwoven fabric and an adhesive sheet in this order from the surface side, and when the paste itself has a certain level of adhesive strength, The plaster and the pressure-sensitive adhesive sheet both having adhesive strength are adhered to the entire back surface of the release sheet, and the work for peeling off the protective release sheet may not be easily performed during use.
[0007]
In particular, from the periphery of the protective release sheet and pressure-sensitive adhesive sheet to the inside of the nonwoven fabric and the plaster, in order to enhance the fit to the skin when used for a part having a three-dimensional shape such as a heel, elbow, knee or shoulder When the cut is formed, the protective release sheet may be torn from the cut portion when the protective release sheet is peeled off from the adhesive sheet and the paste.
[0008]
The purpose of this invention is to laminate a nonwoven fabric laminated with a waterproof sheet on the back surface on the surface of the pressure-sensitive adhesive sheet, and coat the surface of the nonwoven fabric with a waterproof release sheet along with the surface of the pressure-sensitive adhesive sheet extending around the periphery of the nonwoven fabric. The non-woven fabric of medicine can be impregnated and held with a liquid or cream-like drug to provide sufficient protection and improvement effect to the skin by the moisture retention function of the non-woven fabric. That can maintain the adhesiveness of the drug to the skin without causing fragrance, and can simplify the work of peeling the release sheet so that the adhesive force acts only on the periphery of the release sheet To provide a patch.
[0009]
[Means for Solving the Problems]
The present invention has the following configuration as means for solving the above problems.
[0010]
An adhesive sheet having an adhesive applied to the surface;
A nonwoven fabric laminated with a waterproof sheet on the back surface, and the planar shape is substantially similar to the adhesive sheet and smaller than the adhesive sheet, and
A liquid or creamy drug impregnated into the nonwoven fabric from the surface side, and
A waterproof release sheet having a releasability from the pressure-sensitive adhesive of the pressure-sensitive adhesive sheet on the back surface, and having a planar shape substantially the same as the pressure-sensitive adhesive sheet;
The non-woven fabric impregnated with the medicine adheres the back surface to a range excluding the peripheral edge portion on the surface of the pressure-sensitive adhesive sheet, and the waterproof release sheet adheres to the peripheral edge portion on the surface of the pressure-sensitive adhesive sheet at the peripheral edge portion of the back surface. And a sheet-like patch that covers the surface of the nonwoven fabric in a range excluding the peripheral edge of the back surface ,
A plurality of recesses extending from the periphery to the inside of each of the nonwoven fabric and the pressure-sensitive adhesive sheet are formed, and a gap having a constant width is formed between the peripheral edge of the pressure-sensitive adhesive sheet and the peripheral edge of the nonwoven fabric. It is characterized by.
[0011]
In this configuration, a waterproof release sheet, a nonwoven fabric, a waterproof sheet and an adhesive sheet are laminated in order from the surface side, and the adhesive sheet extends around the nonwoven fabric impregnated with a liquid or cream-like drug. Therefore, a liquid or cream-like drug is held inside a non-woven fabric having a moisturizing function in which the front and back surfaces are covered with a waterproof release sheet and a waterproof sheet, and when the waterproof release sheet is peeled off, the liquid or cream-like drug is impregnated. The surface of the formed nonwoven fabric is exposed together with the surface of the surrounding adhesive sheet. The state in which the surface of the nonwoven fabric is in contact with the skin of the affected area is reliably maintained by the adhesive sheet extending around the nonwoven fabric sticking to the skin around the affected area.
In addition, each of the nonwoven fabric and the pressure-sensitive adhesive sheet is divided into a plurality of portions by a plurality of concave portions formed in the periphery, and the peripheral edge portion of the pressure-sensitive adhesive sheet does not reach the inside of the nonwoven fabric. Accordingly, each of the plurality of parts divided in the nonwoven fabric and the pressure-sensitive adhesive sheet can be deformed in different directions, and adheres securely to the skin of the three-dimensional shape such as the heel, elbow, knee or shoulder, and the like. State is maintained. Further, since the nonwoven fabric is not broken by the peripheral portion of the pressure-sensitive adhesive sheet, the drug impregnated in the nonwoven fabric does not leak to the outside from the fracture surface of the nonwoven fabric, and the state of holding the drug by the nonwoven fabric is maintained.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a cross-sectional view showing a configuration of a sheet-like sticking tool according to an embodiment of the present invention. The sheet-like sticking tool 10 according to the embodiment of the present invention is configured by laminating a waterproof release sheet 1, a nonwoven fabric 2, a waterproof sheet 3 and an adhesive sheet 4 in this order from the front side to the back side. The waterproof release sheet 1 is formed, for example, by coating a waterproof or water-repellent resin on at least one side of paper and is easily peeled off from the pressure-sensitive adhesive sheet 4.
[0017]
The nonwoven fabric 2 is formed with a large number of minute spaces that can hold a liquid or cream-like material therein, and is impregnated with a liquid or cream-like drug 5 having high fluidity. The waterproof sheet 3 is laminated on the back surface of the nonwoven fabric 2 (one surface of the present invention), and prevents the liquid or cream-like drug impregnated in the nonwoven fabric 2 from flowing out to the back surface side of the nonwoven fabric 2. The pressure-sensitive adhesive sheet 4 has a surface coated with a pressure-sensitive adhesive.
[0018]
The liquid or cream-like drug 5 impregnated in the nonwoven fabric 2 is composed of components having a protective and improving effect on the skin such as a moisturizing effect and an exfoliating effect. However, the medicine 5 can contain a component (adhesive component) that exhibits adhesive strength. In this case, although the moisturizing power of the drug is reduced by the adhesive component, the non-woven fabric 2 impregnated with the drug essentially has a moisturizing function, so that a sufficient moisturizing effect is given to the skin where the sheet-like patch is used. be able to.
[0019]
FIG. 2 is a plan view of the sheet-like patch when not in use. The sheet-like patch 10 has the waterproof release sheet 1 disposed on the surface. The waterproof release sheet 1 has a planar shape in which a peripheral portion is formed by continuing three outwardly protruding partial arcs 10a each having a recess 10b disposed therebetween. On the lower side of the waterproof release sheet 1, as shown by a broken line in the drawing, a nonwoven fabric 2 having a substantially similar planar shape to the waterproof release sheet 1 is located. Under the nonwoven fabric 2, a waterproof sheet 3 having the same planar shape as the nonwoven fabric 2 and an adhesive sheet 4 having the same planar shape as the waterproof release sheet 1 are located.
[0020]
The waterproof release sheet 1, the nonwoven fabric 2, the waterproof sheet 3, and the adhesive sheet 4 are arranged with the centroid positions in the deformed shape being matched, and the nonwoven fabric 2 and the waterproof sheet are disposed below the waterproof release sheet 1. The adhesive sheet 4 extends around the sheet 3 with a certain width. The back surface of the waterproof release sheet 1 contacts the surface of the nonwoven fabric 2 and also contacts the surface of the adhesive sheet 4 extending around the nonwoven fabric 2, and adheres to the surface of the adhesive sheet 4 around the nonwoven fabric 2.
[0021]
Therefore, the non-woven fabric 2 and the waterproof sheet 3 are similar to the waterproof release sheet 1 and the pressure-sensitive adhesive sheet 4, and the outer circumferential partial arcs 20 a with the concave portions 20 b disposed between them are continuously formed to form the peripheral portion. The peripheral portion of the waterproof release sheet 1 and the adhesive sheet 4 does not intersect with the peripheral portion. That is, the peripheral edge portions of the waterproof release sheet 1 and the adhesive sheet 4 do not reach the plane of the nonwoven fabric 2 and the waterproof sheet 3, and the nonwoven fabric 2 is partially covered by the peripheral edge portions of the waterproof release sheet 1 and the adhesive sheet 4. It will not break.
[0022]
Moreover, the sheet-like sticking tool 10 configured by laminating the waterproof release sheet 1, the nonwoven fabric 2, the waterproof sheet 3, and the adhesive sheet 4 includes three recesses 10b and recesses 20b. It is divided into an outer part and a central part. The divided portions are individually displaceable in the thickness direction of the sheet-like sticking tool 10.
[0023]
However, the planar shape of the sheet-like sticking tool 10 is not limited to the shape shown in FIG. 2, and the peripheral edge may be formed by two or four or more partial arcs 10a, 20a and recesses 10b, 20b. Moreover, the liquid or cream-like chemical | medical agent 5 can be more reliably hold | maintained inside the nonwoven fabric 2 by coat | covering the peripheral part of the surface of the nonwoven fabric 2 with the waterproof sheet 3. FIG.
[0024]
FIG. 3 is a plan view showing a state when the sheet-like sticking tool is used. When using said sheet-like sticking tool 10, the waterproof release sheet 1 is peeled off from the surface of the adhesive sheet 4, and the surface of the adhesive sheet 4 is exposed with the surface of the nonwoven fabric 2. In this state, the nonwoven fabric 2 is positioned so that the surface of the nonwoven fabric 2 is in contact with the skin of the affected area, and the pressure-sensitive adhesive sheet 4 is pressed from the back surface side to adhere the surface of the pressure-sensitive adhesive sheet 4 to the skin around the affected area. The drug 5 impregnated in the nonwoven fabric 2 comes into contact with the affected skin from the surface of the nonwoven fabric 2, and the effect of the drug 5 acts on the affected skin.
[0025]
In the sheet-like patch 10, the nonwoven fabric 2 impregnated with the liquid or cream-like drug 5 has the waterproof sheet 3 laminated on the back surface. Moreover, in the sheet-like patch 10 when not in use, the surface of the nonwoven fabric 2 impregnated with the liquid or cream-like drug 5 is covered with the waterproof release sheet 1. Further, the nonwoven fabric 2 does not have a breakage portion due to the peripheral edge portions of the waterproof release sheet 1 and the adhesive sheet 4. In addition, the waterproof release sheet 1 is adhered to the periphery of the nonwoven fabric 5 on the adhesive surface of the adhesive sheet 4 over the entire circumference. Accordingly, the medicine 5 is reliably held inside the nonwoven fabric 2 after the sheet-like patch 10 is manufactured and used, and the medicine 5 impregnated in the nonwoven fabric 2 leaks out of the sheet-like patch 10. There is nothing to do.
[0026]
In the sheet-like applicator 10, the adhesive sheet 4 is divided into three outer portions and one central portion, and each portion is individually displaceable with respect to the thickness direction of the sheet-like applicator 10. Therefore, even when the affected part to which the medicine 5 impregnated in the nonwoven fabric 2 is to act has a three-dimensional shape such as a heel, an elbow, a knee, or a shoulder, each of the plurality of parts divided in the nonwoven fabric 2 and the adhesive sheet 4 is used. By appropriately deforming so as to come into contact with the affected area and the surrounding skin, the skin is securely adhered and the state is maintained.
[0027]
Moreover, even if the chemical | medical agent 5 which contacts the skin of an affected part contains only the component which has the protection and improvement effect with respect to skin, and does not contain an adhesive component, the adhesive sheet 4 around the skin of the affected part which the nonwoven fabric 2 contacts. By sticking, the contact state with respect to the skin of the medicine 5 impregnated in the nonwoven fabric 2 is reliably maintained.
[0028]
When the medicine 5 impregnated in the nonwoven fabric 2 does not contain an adhesive component, the surface of the adhesive sheet 4 adheres to the back surface of the waterproof release sheet 1, but the nonwoven fabric 2 sticks to the center portion. Absent. Therefore, the adhesive force acts only on a part of the back surface of the waterproof release sheet 1, and the work of peeling off the waterproof release sheet 1 in the sheet-like patch 10 can be easily performed.
[0029]
Figure 4 is a cross-sectional view showing the configuration of a sheet over preparative like sticking tool. A sheet-like patch 11 according to this embodiment is obtained by coating the surface of a nonwoven fabric 2 impregnated with a liquid or cream-like drug 5 with a waterproof film 12, and the other configuration is the sheet-like patch shown in FIG. 10 is the same.
[0030]
Thus, by covering the surface of the nonwoven fabric 2 impregnated with the drug 5 with the waterproof film 12, it is possible to prevent the drug 5 impregnated in the nonwoven fabric 2 from adhering to the back surface of the waterproof release sheet 1, and It is possible to more reliably prevent the medicine 5 from being dried before using the shaped patch 11. Further, when the sheet-like patch 11 is manufactured, the nonwoven fabric 2 having the back surface laminated with the waterproof sheet 3 is impregnated with the drug 5 and then the surface of the nonwoven fabric 2 is covered with the waterproof film 12 so that the nonwoven fabric 5 is impregnated. It is possible to prevent a decrease in workability due to the adhered medicine 5 adhering to a manufacturing device or the like.
[0031]
These effects are more prominent when the drug 5 contains an adhesive component, and the ease of work for peeling off the waterproof release sheet 1 is not impaired.
[0032]
In addition, by making the planar shape of the waterproof film 12 larger than the planar shape of the nonwoven fabric 2, the waterproof film 12 is also opposed to the side surface of the nonwoven fabric 2, and leakage and transpiration of the drug 5 impregnated in the nonwoven fabric 2 are prevented. You may make it prevent more reliably.
[0033]
【The invention's effect】
According to the present invention, the following effects can be obtained.
[0034]
(1) A waterproof release sheet, a nonwoven fabric, a waterproof sheet, and an adhesive sheet are laminated in order from the surface side, and the adhesive sheet is extended around the nonwoven fabric impregnated with a liquid or cream-like drug, thereby forming a liquid or cream Can be securely held inside the nonwoven fabric whose front and back surfaces are covered with the waterproof release sheet and the waterproof sheet, and when the waterproof release sheet is peeled off, the liquid or cream-like drug is impregnated. The surface of the non-woven fabric can be exposed together with the surface of the surrounding adhesive sheet. The adhesive sheet that extends around the nonwoven fabric adheres to the skin around the affected area, ensuring that the surface of the nonwoven fabric is in contact with the skin of the affected area, and that keeps the drug held inside the nonwoven fabric for a long time. It can be kept in contact with the affected skin. Moreover, since the chemical | medical agent is hold | maintained in the nonwoven fabric which has a moisturizing function, even when the chemical | medical agent contains the adhesive component which weakens a moisturizing effect, a sufficient moisturizing effect can be made to act on skin.
[0035]
(2) Each of the nonwoven fabric and the pressure-sensitive adhesive sheet is divided into a plurality of portions by a plurality of recesses formed around the nonwoven fabric, and the peripheral edge of the pressure-sensitive adhesive sheet is prevented from reaching the inside of the nonwoven fabric, whereby the nonwoven fabric and the pressure-sensitive adhesive sheet Can be deformed in different directions from each other so that it can be reliably and easily adhered to the skin of a three-dimensional shape such as a heel, elbow, knee or shoulder, and its state can be assured. Can be maintained. In addition, since the nonwoven fabric is not broken by the peripheral portion of the pressure-sensitive adhesive sheet, the drug impregnated in the nonwoven fabric does not leak to the outside from the fracture surface of the nonwoven fabric, and the holding state of the drug by the nonwoven fabric is more reliably maintained. be able to.
[0036]
(3) Manufacture by attaching the other surface of the nonwoven fabric with one surface adhered to the adhesive surface of the pressure-sensitive adhesive sheet with a waterproof film, so that the drug impregnated into the nonwoven fabric during manufacture adheres to the manufacturing equipment or the like It is possible to reliably prevent deterioration in workability and a decrease in peelability of the waterproof release sheet due to the drug impregnated in the nonwoven fabric in the product adhering to the waterproof release sheet. In addition, the transpiration of the drug from the nonwoven fabric can be more reliably prevented.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a configuration of a sheet-like sticking tool according to an embodiment of the present invention.
FIG. 2 is a plan view of the sheet-like patch when not in use.
FIG. 3 is a plan view showing a state when the sheet-like sticking tool is used.
4 is a sectional view showing the configuration of a sheet over preparative like sticking tool.
[Explanation of symbols]
1-waterproof release sheet 2-nonwoven fabric 3-waterproof sheet 4-adhesive sheet 5-drug 10-sheet-like patch 10a, 20a-part arc 10b, 20b-concave

Claims (1)

An adhesive sheet having an adhesive applied to the surface;
A nonwoven fabric laminated with a waterproof sheet on the back surface, and the planar shape is substantially similar to the adhesive sheet and smaller than the adhesive sheet, and
A liquid or creamy drug impregnated into the nonwoven fabric from the surface side, and
A waterproof release sheet having a releasability from the pressure-sensitive adhesive of the pressure-sensitive adhesive sheet on the back surface, and having a planar shape substantially the same as the pressure-sensitive adhesive sheet;
The non-woven fabric impregnated with the medicine adheres the back surface to a range excluding the peripheral edge portion on the surface of the pressure-sensitive adhesive sheet, and the waterproof release sheet adheres to the peripheral edge portion on the surface of the pressure-sensitive adhesive sheet at the peripheral edge portion of the back surface. And a sheet-like patch that covers the surface of the nonwoven fabric in a range excluding the peripheral edge of the back surface ,
A plurality of recesses extending from the periphery to the inside of each of the nonwoven fabric and the pressure-sensitive adhesive sheet are formed, and a gap having a constant width is formed between the peripheral edge of the pressure-sensitive adhesive sheet and the peripheral edge of the nonwoven fabric. A sheet-like patch.

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