CN1457769A - Self adhesive medical medicine plaster - Google Patents

Abstract

A self-adhesive medical patch, which comprises a waterproof and breathable base cloth layer coated with an adhesive layer on the surface discontinuously, a drug layer that is coated on the surface of the adhesive layer and located at its center, and bonded on the The peelable protective strip on one side of the surface of the adhesive layer, the peelable protective layer coated with the anti-adhesive material layer covering the adhesive layer and the drug layer, and the other layer covered on the base cloth A surface support layer. The self-adhesive medical patch of the present invention has high elasticity, waterproof, and moisture-permeable functions. The waterproof function can prevent wound infection caused by water ingress in the wound, and the high moisture-permeable function can ensure normal breathing of the wound and the skin around it, and reduce skin immersion. , high elasticity so that the patch can be attached to parts of the body that are not easy to stick (such as hands and feet, etc.), because its elasticity will not restrict body activities.

Description

A self-adhesive medical patch

technical field

The invention relates to a self-adhesive medical patch, in particular to a waterproof, antibacterial, high moisture-permeable, high-elasticity, transparent, easy-to-use medical patch, which belongs to the field of medical materials.

Background technique

Self-adhesive medicinal plaster, because easy to use, economy, reliable curative effect, is adopted by majority of patients willingly. The common feature of this type of patch is that it has a drug layer and an adhesive layer, and the drug layer is fixed around the wound by means of the adhesive layer to treat or protect the wound.

Chinese patent ZL90100236 discloses "a surgical dressing for treating wounds and its preparation process". This surgical dressing uses soft, porous, breathable synthetic polymer materials or natural polymer materials as supports to absorb prepared alginate Sodium acid solution is formed by drying and cooling, and its disadvantage is that it is not waterproof. Especially when it is applied to the drug patch, the clothes are soaked due to the evaporation of the liquid medicine during use. In order to solve the problem of waterproofing the patch, Chinese utility model patent ZL96221892.8 discloses "a medical moisturizing dressing". In order to effectively prevent the evaporation of the medicinal solution and avoid soaking the clothes, the dressing is covered with a layer of overlapping gauze layers. Moisture impermeable plastic film layer. Chinese utility model patent 93242544.5 discloses a "one-time use trauma waterproof sticker", which is composed of three parts: an impermeable medical waterproof film, a waterproof adhesive film and an adhesive film protective adhesive tape. The medical waterproof film is made of plastic film Made of polymer material with impermeable properties. Chinese utility model patent ZL94242100.0 discloses a "drug patch". In order to effectively prevent the penetration of medicinal liquid, the dressing adopts materials such as an aluminum foil layer as an anti-seepage layer. The common feature of these products is that they have the function of waterproof, moisturizing and anti-seepage, but they are impermeable to moisture vapor, which hinders the natural breathing of human skin and prevents the patient's sweat from being discharged in a vapor state. The skin and wounds are prone to soaking and infection. not good.

The Chinese utility model patent with the publication number CN1270011A discloses "a waterproof, breathable, wound-healing medicinal patch and its production method". The medicinal patch includes a base cloth, an adhesive film coated on the base cloth, and a The drug dressing, and the face cloth covered on the base cloth adhesive film and the drug dressing, are characterized in that the base cloth is made of a polymer film material, and the upper cloth has a diameter of 0.2 to 5 microns and a distribution density of More than 5 million micropores per square centimeter. The purpose of using this base cloth is to make the product waterproof and breathable. However, because the production process of the adhesive film is a traditional full coating process, that is, the applied adhesive forms a film (the adhesive film has no micropores), and the adhesive film covers the film with micropores, blocking the film. Even if the film has micropores, it will affect the air permeability of the product after being coated with the adhesive film, or even not have the air permeability function, which hinders the natural breathing of the human skin and prevents the patient's sweat from being discharged in a vapor state.

Potter (U.S. Patent No. 4,595,001) discloses a vapor-transmissive wound dressing construction in which an adhesive is applied discontinuously to a moisture-permeable backing while leaving a sufficient percentage of the backing in direct contact with the skin .

Rawlings (US Patent No. 4,798,201) discloses the construction of a porous, water vapor permeable adhesive film for a wound dressing.

Takemoto (European Patent 0353972) discloses a construction for wound dressings where the adhesive is dotted onto the backing so as to leave a sufficient percentage of the backing in direct contact with the skin.

Siver (US Patent No. 3,691,140) discloses a porous, vapor permeable adhesive construction for a wound dressing by applying the adhesive to a backing using a discontinuous coating process. These dressings are moisture vapor permeable to beneficially maintain a relatively normal moisture content in the outermost layer of the skin.

The Chinese utility model patent with the notification number CN1212613A discloses a "wound dressing". The dressing has a film dressing layer, and one side of the film dressing layer is coated with an adhesive. Films, adhesives are applied discontinuously. The Chinese utility model patent with the publication number CN1162268A discloses a "wound dressing with improved water vapor permeability and low damage", which includes a water vapor permeable backing and a dot-coated adhesive layer. The characteristics of these products are: waterproof and moisture-permeable, but they are only a wound care dressing and do not have the function of "medicine" patches.

It is not difficult for those skilled in the art to understand that vapor permeability and waterproofness are a pair of contradictions, and so far there is no one that can take both vapor permeability and waterproofness into consideration to achieve the best treatment or health care effect. Pills.

Invention content:

The purpose of the present invention is to provide a self-adhesive medical patch with water resistance, moisture permeability and high elasticity. The medical patch is not afraid of water immersion, can prevent the medicine liquid from leaking out, does not affect the normal breathing of the skin, and can make the medical patch stick to various parts of the body comfortably.

In order to achieve the above object, the technical solution adopted by the present invention is: a self-adhesive medical patch, the patch includes a waterproof and breathable base cloth layer coated with an adhesive layer discontinuously on the surface, coated on the The surface of the adhesive layer, and the drug layer at its central part, a peelable strip-shaped protective strip bonded to one side of the adhesive layer surface, a peelable protective strip coated with an anti-adhesive material covering the adhesive layer The protective layer and the support layer covering the other surface of the base cloth.

A layer of anti-adhesive material is coated on the surface of the protective layer, and the layer of anti-adhesive material is silicone oil.

The medicine can be a traditional Chinese medicine extract or ointment with therapeutic and health-care functions, and can also use a combination of Chinese and Western medicines for analgesia, anti-inflammatory, sterilization, and recovery of damaged tissues according to the optimized formula and ratio, and use sterile sanitary gauze sheets Wound healing agent dressing as a carrier, and any self-adhesive medicinal drug in the prior art.

The base fabric layer has a moisture vapor permeable function to allow bodily fluids (such as sweat and wound exudate) to evaporate from under the dressing. Preferred material is at 40 ℃, under the condition of 80% humidity, according to ASTME96-80, the water vapor transmission rate (MVTRUP) measured in 24 hours is at least about 500g/m2.24 hours, most preferably at least about 1000g/m2.24 hours of material (need to determine an upper limit). Preferred base fabrics can also be visually inspected without removing the dressing. A good base fabric having the required integrity, continuity, strength and moisture vapor permeability is a hydrophilic polyurethane film with a thickness of about 15-80 μm, preferably 29-60 μm, most preferably 25-50 μm. For example: British patent GB1280631, European patents EP51935, EP91800 and EP178740 described in the high moisture-permeable polyurethane film. For example: products sold under the trademark ESTANE by B.F.goodrich and HYTREL by E.I.PuDont and medical elastic highly vapor permeable polyurethane films sold by Smith+Nephew, UK.

The pressure sensitive adhesive is preferably one that is non-irritating to the skin and that is strong and durable. The adhesive layer is applied in a non-continuous manner, for example, with a scattered pattern, to ensure the moisture permeability of the product. After testing, the moisture permeability of the patch processed by this coating process is as high as 800-1000g/m2.24 hours.

The releasable protective layer comprises a solid layer of material which is easily removed from the adhesive surface of the dressing when desired. Suitable materials include paper and film materials having a surface that allows the material to be released from the adhesive. The surface can be coated with a release material such as silicon containing compounds to give the surface good release properties. There is a strip-shaped protective strip at one edge between the adhesive layer and the protective layer. The function of the protective strip is to form a handle to help remove the entire protective layer, and fix the dressing on the wound site before removing it. This strip-shaped protective strip has the function of preventing the dirt on the hands from contaminating the adhesive on the base layer, or the adhesive from contaminating the hands

The support layer is made of a material that is relatively harder than that of the base cloth, so that it supports the base cloth layer and prevents the patch from wrinkling and bending. Suitable materials include polyalkylene films of polyethylene or polypropylene, or polyethylene terephthalate, and paper-based materials are also suitable. The support layer can be transparent, translucent or opaque. The support layer is located on the non-adhesive layer side of the base fabric. The support layer and the base fabric are adhered to the base fabric by the inherent attraction between the two materials, for example: electrostatic force or basic mechanical force, which is well known in the art of providing support layers for film dressings of. The support layer includes a portion that is folded back away from the base fabric layer so that the support layer can be easily grasped and removed during application of the patch.

Description of drawings:

Fig. 1 is the schematic diagram of the partial expansion of plaster of the present invention;

Fig. 2 is a longitudinal sectional view of the patch of the present invention.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to Fig. 1, 2, a kind of self-adhesive medical patch, it comprises that surface is coated with adhesive layer 6 waterproof breathable base cloth layer 1 discontinuously, is coated on described adhesive layer 6 surface, and is positioned at its The drug layer 2 at the center, the peelable strip-shaped protective layer 3 bonded to the surface side of the adhesive layer 6, the adhesive layer 6 and the drug layer 2 covered with a release material layer 7 The peelable protective layer 4 and the support layer 5 covering the other surface of the base cloth.

The patch and drug layer 2 can be circular, oval, rectangular or square.

The anti-adhesive material layer 7 is a silicone oil anti-adhesive material layer.

During use, the strip-shaped protective strip 3 is removed by the hand, and the entire surface-shaped protective layer 4 is removed, and the drug patch with the protective layer 4 removed is passed through the base cloth 1 coated with the adhesive layer 6, and the central drug layer 2 of the drug patch is paired. The position to be treated must be fixed, then the protective strip 3 is removed, the drug patch is fixed again gently, and the support layer 5 is removed at last, and the application is completed.

The self-adhesive medical patch of the present invention can be prepared as a slimming drug patch, specifically: refining the formula of slimming Chinese herbal medicines such as Zexie, hawthorn, senna, cassia, etc. into a liquid extract, and applying it to the base cloth coated with adhesive , and then cover the protective layer to make a drug patch of 8cm * 10cm. When in use, remove the protective layer, apply the medicine directly on the Shenque acupoint, apply it every night, and remove it in the morning. It is convenient and hygienic to use.

The self-adhesive medical plaster of the present invention can also be prepared as a medicinal plaster for external treatment of internal diseases, specifically: for example, the Chinese herbal medicine formula similar to the Shengong Yuanqi bag is refined into a liquid extract, which is then applied to the base cloth coated with adhesive, and then reapplied. The upper protective layer is made into a medicine patch of 8cm * 8cm. When in use, the protective layer is removed, and the medicine is directly applied to the Shenque point. Due to the high concentration of the medicine, it is easy to be absorbed by the human body. Reduce the amount of medicine, easy to carry and use.

The self-adhesive medical patch of the present invention can also be prepared as a drug patch for osteoporosis, specifically: the drug layer of the present invention can be used as the drug layer of the present invention, and the protective layer is covered to form Products of various specifications. This product can be conveniently and effectively used to treat diseases such as cervical vertebrae and hyperosteogeny, and can effectively reduce drug volatilization, prolong the action time of drugs on bone hyperplasia, improve curative effect and shorten the course of treatment. It is convenient and hygienic to use.

The self-adhesive medical patch of the present invention can also be prepared as a drug patch for scar hyperplasia, specifically: coating the existing scar softening and antipruritic drug on a sterile sanitary gauze sheet, and using the gauze sheet with the drug as the drug layer It is fixed on the base cloth coated with adhesive, and then covered with a protective layer to make medicine patches of various specifications. Not only is it more convenient to use and carry, but it is also non-irritating to scars. It can be used for early treatment before scars have no hyperplasia or complete hyperplasia, so as to achieve the purpose of preventing scar hyperplasia and early healing of scars, improving curative effect and shortening the course of treatment.

The self-adhesive medical patch of the present invention can also be prepared as a skin disease drug patch, specifically: tinctures and ointments for skin diseases are easy to contaminate clothes, and if they are wiped off by clothes, the curative effect will also be reduced, and the above treatment skin The ointment of the disease is coated on the sterile sanitary gauze sheet, and the gauze sheet with the drug is fixed on the base cloth coated with the adhesive as a drug layer, and then covered with a protective layer to make a drug patch of various specifications. It is very convenient to use, and it can prevent the liquid medicine from penetrating and contaminating clothes. The medicinal patch can be used on various parts of the body to effectively treat skin diseases in various parts of the body.

Beneficial effect:

The product of the present invention has the following advantages:

1. The base fabric is based on high moisture permeability and high elasticity polyurethane film, and the adhesive is processed by discontinuous coating process, so as to ensure that the product has waterproof and moisture permeability functions.

2. The medicinal plaster of the present invention fully exerts the advantages of Chinese medicine, especially Chinese medicine in wound treatment and health care, and has the functions of treating various diseases and health care.

3. The base cloth used in the medical patch of the present invention has high elasticity and is very compliant. The patch can be attached to any part of the body (such as hands and feet, etc.), because its elasticity will not limit the activities of the various parts of the patient's body.

4. The medical-grade adhesive can ensure that the patch is attached to various parts of the body without the risk of skin irritation and has anti-bacterial function.

5. The function of the protective layer and the support layer and the transparent base fabric make the product more convenient and hygienic to use.

Claims (3)

1. medical medicine plaster; it is characterized in that: it comprises the discontinuous base cloth layer (1) that scribbles adhesive layer (6) waterproof and breathable in surface; coated is on described adhesive layer (6) surface and be positioned at the medicine layer (2) in its centre; be bonded in the strippable strip ceiling (3) of the surperficial side of described adhesive layer (6), cover the strippable protective layer (4) that scribbles adhesive layer (7) of described adhesive layer (6) and medicine layer (2) and cover another surface support layer (5) of described base cloth.

2. a kind of medical medicine plaster according to claim 1 is characterized by: the medicine layer of described plaster (2) can be circle, ellipse, rectangle or square.

3. a kind of medical medicine plaster according to claim 1 is characterized by: described adhesive layer (7) is a silicone oil adhesive layer.

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