JPH0810283A - Patch material - Google Patents

Abstract

PURPOSE:To enable sure sticking without wrinkling of the skin surface, etc., by superposing a nonwoven fabric which is slightly stiffer than a plastic film and has flexibility on one surface of a flexible plastic film having waterproof moisture permeability and air permeability and forming a tacky adhesive layer on the nonwoven fabric side. CONSTITUTION:The polyurethane nonwoven fabric 2 which is slightly stiffer than the polyurethane film 1 having the waterproofness, the moisture permeability and air permeability in combination and has the flexibility is superposed on the polyurethane film 1 and an acrylic tacky adhesive 4 having moisture permeability is applied on the surface of the nonwoven fabric 2 of a laminate 3. A pad 5 formed by laminating a perforated polyethylene film on the front surface side of the nonwoven fabric 2 in contact with the lesion is fixed onto the tacky adhesive layer 4 and the front surface is coated with release paper 6 subjected to a silicone treatment on its surface, by which the patch material 7 is obtd. This patch is stickable cleanly to the lesion while sufficiently adapting itself to the ruggedness of the lesion. The patch has proper stretchability and follows up the body movement.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a patch material mainly used for medical treatment and others.

[0002]

2. Description of the Related Art Conventionally, patch materials that have been used by sticking to the skin surface to protect and treat wounds are well adapted to the unevenness of the skin surface and can follow repeated expansion and contraction and bending. In addition, a highly waterproof waterproof film or other sheet is used, and an adhesive layer is provided on one surface of the sheet.

However, since the above-mentioned sheet is rich in flexibility, it is not stiff as a whole, and it often bends easily and cannot be used because the adhesive layers adhere to each other. It is quite difficult to paste on. Therefore, a strong and sturdy edging piece is provided on the opposite edges of the sheet, and the sheet is attached to the skin surface while keeping the sheet in an expanded state by holding the edging piece, and then the edging piece is cut with scissors. Although they are removed, it takes time and effort to remove them with scissors, and the skin may be damaged, so improvement is desired.

In addition to the release paper covering the pressure-sensitive adhesive layer of the sheet, a durable plastic sheet application is temporarily attached to the sheet surface opposite to the pressure-sensitive adhesive layer. It is also known that the release paper is peeled off to expose the pressure-sensitive adhesive layer, and the applicate is attached to a desired skin surface in a state of being temporarily attached, and then the applicate is peeled off. This is because the sheet is kept in a stretched state by the above-mentioned application, so that the adhesive layers do not adhere to each other, but the entire sheet becomes difficult to bend and becomes uneven on the skin surface. May not be able to be applied well, and is not yet fully satisfactory.

[0005]

Therefore, such a highly flexible sheet can be accurately applied to a desired position such as the skin surface without wrinkling, or after the application. But I can adapt to this as my body moves,
It is intended to obtain a patch that can sufficiently protect the affected area.

[0006]

DISCLOSURE OF THE INVENTION The present invention provides one side of a flexible plastic film having both moisture permeability and breathability as well as waterproofness, and a non-woven fabric having flexibility which is slightly softer than that of the plastic film. They are superposed on each other and integrated, and a pressure-sensitive adhesive layer is formed on the non-woven fabric side. Further, a pad having an appropriate size that can come into contact with a scratch or the like is placed on the pressure-sensitive adhesive layer.

To explain the present invention in more detail, a plastic film having a thickness of about 10 to 50 .mu.m, particularly preferably 20 to 40 .mu.m can be used, and such a polyurethane film adheres to the surface. It is waterproof, water-permeable, moisture-permeable, and air-permeable, and is highly flexible and stretchable.

A non-woven fabric is laminated and integrated on one surface of the plastic film, and the non-woven fabric has a basis weight of about 20 to 150 g / m ² , and particularly preferably 3
A polyurethane non-woven fabric of 0 to 100 g / m ² can be used. This polyurethane non-woven fabric has a flexibility which is stronger than that of the above-mentioned polyurethane film, and it is possible to give an appropriate amount of waist so that the above-mentioned polyurethane film is not easily bent and to keep the stretched state. It has wettability and breathability, and also has suitable elasticity. As such a polyurethane non-woven fabric, for example, Espanthione (manufactured by Kanebo Co., Ltd.) can be preferably used.

An adhesive layer is formed on the non-woven fabric,
As the pressure-sensitive adhesive, a natural rubber-based, acrylic-based, silicon-based or other appropriate pressure-sensitive adhesive can be used. It is advisable to use a moisture-permeable and breathable adhesive for this adhesive.
It can be applied to the entire surface of the non-woven fabric. In addition, breathability,
Even if it is not breathable, it is preferable to apply it in the shape of a frame with a constant width on the peripheral portion of the non-woven fabric, and to apply it in the form of dots, stripes or other patterns inside the frame.

If necessary, a pad may be provided on the pressure-sensitive adhesive layer so as to come into contact with an affected area such as a wound.
It is preferable to use a large pad or a small pad according to the site to be used, and its thickness can be appropriately selected. Further, it is often more preferable to use a pad capable of appropriately following the expansion and contraction of the plastic film and the non-woven fabric as the pad.

Such a pad can be made of non-woven fabric, woven fabric, knitted fabric or the like, and if a plastic film such as thin polyethylene is laid on the surface side contacting the affected area, adhesion to a wound or the like can be prevented. It will be more preferable. And, it is often convenient to make holes in this plastic film because the moisture permeability and the air permeability can be secured. Also, instead of stacking this perforated plastic film, even when using a net-like braid of fibers that do not stick to the exudate such as blood such as nylon thread, it is possible to secure adhesion to scratches, moisture permeability, breathability To be done.

The exposed pressure-sensitive adhesive layer may be covered with one or several release papers.
Since it is peeled off when used, it is advisable to use a durable material such as paper or a slightly rigid plastic film so that the patch can be stored and stored in a certain shape.

[0013] Such an adhesive material has flexibility and elasticity when the release paper is peeled off properly and, when the pad is in place, the adhesive layer is pressed against the affected area while being applied to the wound area. The polyurethane film on the surface also has a moderate spreading effect due to the stronger non-woven fabric, so that the adhesive layers do not stick to each other, and the entire patch has moderate elasticity. Therefore, even if the affected area has irregularities, it can be applied well without wrinkling while conforming well to the surface.

When the patch is applied to the affected area in this way, even if water is splashed or gets into the water, the surface of the polyurethane film repels the water so that the water penetrates into the affected area. No, it is kept clean. In addition, since sweat etc. on the affected area is appropriately volatilized due to the moisture permeability of the patch, the breathability is also maintained.
It is possible to further promote healing while protecting the wound without causing the affected area to become damp and worsening the wound or the like.

[0015]

Example A polyurethane film 1 having a thickness of 30 μm and a polyurethane non-woven fabric 2 (manufactured by Espansione Kanebo Co., Ltd.) having a basis weight of 50 g / m ² are laminated and laminated. The surface of the nonwoven fabric 2 of the laminate body 3 is coated with 40 g / m ^{2 of the} acrylic pressure-sensitive adhesive 4 having moisture permeability. And
A pad 5 having a polyethylene film with holes laminated on the surface side of a nonwoven fabric made of polypropylene, rayon, and polyester fibers, which contacts the affected area, was placed on the pressure-sensitive adhesive layer 4, and the surface was treated with silicon. The patch 7 was obtained by covering with a sheet of release paper 6.

The laminate body 3 in which a polyurethane non-woven fabric was laminated on the above-mentioned polyurethane film was cut into a long piece of 24 mm width × 50 mm, and its characteristics were measured. 5% Tensile stress 80gf / 24mm (Latitude direction) 50% Tensile stress 420gf / 24mm (Latitude direction) 100% Tensile stress 550gf / 24mm (Lateral direction) Breaking strength 1600gf / 24mm (Lateral direction) Stretching 450% (Lateral direction) 50% elongation recovery rate 88% 50% stress relaxation rate 25% (after 30 seconds) Further, the moisture permeability was measured for the above laminate and the one coated with the above adhesive, and the results were as follows. . Without adhesive layer 2100g / m ² · 24hr With adhesive layer 1900g / m ² · 24hr

When the release paper was peeled off, this patch had a moderate elasticity as a whole and was easy to apply to the affected area, and it was able to be applied sufficiently to the unevenness of the affected area and applied cleanly. In addition, while following the movement of the body even after application, it is possible to prevent infiltration of water into the affected area, prevent stuffiness of the affected area due to its moisture permeability and air permeability, and perform effective treatment while protecting the affected area. did it.

[0018]

Industrial Applicability As described above, the present invention can be applied neatly while sufficiently accommodating the irregularities of the affected area, and has a proper elasticity even after application, and can follow the movements of the body while It is possible to prevent the infiltration of water into the skin and prevent the swelling of the affected area to improve the therapeutic effect. Further, the structure is simple and economical to use.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view in a thickness direction showing an embodiment of the present invention.

[Explanation of symbols]

 1 Polyurethane film 2 Polyurethane non-woven fabric 3 Laminate body 4 Adhesive layer 5 Pad 6 Release paper 7 Adhesive material

Continuation of the front page (72) Inventor Naoto Hotta 2-4, 9-2, Mindan, Chiyoda-ku, Tokyo Nichiban Co., Ltd.

Claims (3)

[Claims] 1. A non-woven fabric having flexibility, which is more flexible than the plastic film, is laminated on one side of a flexible plastic film having waterproofness, moisture permeability and air permeability, and an adhesive layer is provided on the non-woven fabric side. A patch that has been formed. 2. A flexible polyurethane film having waterproofness, moisture permeability, and air permeability is overlaid with a polyurethane nonwoven fabric having flexibility which is slightly more flexible than that of the polyurethane film, and adhered to the polyurethane nonwoven fabric side. A patch with a drug layer. 3. The patch according to claim 1, wherein a flexible pad is placed on the pressure-sensitive adhesive layer so as to be located in the center thereof.