Wound dressing with antibacterial and bacterial warning functions and preparation method thereof

A wound dressing and functional technology, applied in dressings, non-adhesive dressings, bandages, etc., can solve the problems of complex preparation process and high production cost, and achieve the effect of simple process steps, strong peeling effect, and stable chemical properties
CN111346255BActive Publication Date: 2022-04-19SICHUAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SICHUAN UNIV
Publication Date
2022-04-19

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Abstract

The wound dressing with both antibacterial and bacterial warning functions of the present invention is composed of a wound contact layer, an intermediate moisture-absorbing layer and an external protective layer. The wound contact layer is a fibrous film with blood coagulation function, and the intermediate moisture-absorbing layer contains Polyvinyl alcohol porous foam with antibacterial agent, the outer protective layer is polyvinyl alcohol dense foam containing methylene blue and antibacterial agent, the middle moisture absorption layer and the outer protective layer are an integrated structure, and the wound contact layer and the middle moisture absorption layer are combined together , the antibacterial agent is a quaternary ammonium salt or a quaternary phosphonium salt. When the dressing of the present invention is free of bacteria, the middle hygroscopic layer and the outer protective layer are blue, and gradually change from blue to white if bacteria grow. The steps of the preparation method of the dressing are as follows: (1) preparing a polyvinyl alcohol foam with a dense top surface and a porous structure in the lower part, (2) soaking and drying, (3) preparing a fibrous film with blood coagulation function, (4) cutting, Assembly, packaging and sterilization.
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Description

Technical field

[0001] The present invention belongs to the field of wound dressings, relates to wound dressings having both antibacterial and bacteriological warning functions and preparation methods thereof. Background

[0002] Skin trauma is a common type of injury, and dressings are medical materials used for skin trauma treatment and protection. At present, although there are many kinds of wound dressings on the market, there are mainly two types. One type is a dressing with coagulation, hygroscopicity, and promotes wound healing, and the other type is to add an antibacterial dressing on the basis of the above function, but the dressing with antibacterial function is mainly by adding silver ions to give the dressing good antibacterial properties (such as the Aquacel Ag dressing produced by ConvaTec), and the silver ion has a certain cytotoxicity, which will cause adverse effects on the injured person, and the addition of silver ions will increase the preparation cost of the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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