Wound dressing with multi-layer structure and preparing method and application thereof

Abstract

The invention relates to a wound dressing with a multi-layer structure and a preparing method and application thereof. The wound dressing at least comprises a liquid conduction layer and a liquid storage layer, wherein the transverse wet conduction speed of the liquid storage layer is larger than the transverse wet conduction speeds of other layers; the wound-secreted-liquid hygroscopicity of thewound dressing is larger than 50 grams / 100 square centimeters. By means of the wound dressing, it can be effectively avoided that wound percolated liquid is transversely diffused to the peripheral healthy skin of a wound to cause the condition that the healthy skin is injured, and the wound dressing is suitable for nursing of an ulcerous wound and a chronic wound and compression hemostasis.

Description

technical field [0001] The invention relates to a wound dressing with a multilayer structure, its preparation method and its application. Background technique [0002] Moist modern wound dressings are now generally accepted and widely used in ulcerative wound care. Moist wound dressings are based on the theory of moist healing, so that the wound surface can maintain a moderately humid environment and a suitable temperature under the moist wound dressings to promote wound healing. Therefore, moist wound dressings need to be highly hygroscopic and moisturizing. At present, most of these moist wound dressings are fibrous wound dressings with sol properties, such as calcium alginate wound dressings, chitosan wound dressings, and modified cellulose wound dressings. These dressings are highly hygroscopic and highly moisturizing, forming a gel after absorbing wound exudate, thereby providing a relatively moist environment for wound healing. However, most of these dressings only ...

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Problems solved by technology

[0003] European Patent EP0690344, U.S. Patent US6458460, British Patent GB2489541, Chinese Patent CN102727925B, Chinese Patent Application CN106894111A and Chinese Patent Application CN1235533A all disclose some hygroscopic dressings, but none of them can keep the dressing surface relatively dry

[0004] Chinese patent CN105640705A discloses a composite functional medical dressing. The dressing consists of two layers: a functional layer and a protective layer. The functional layer is made of alginic acid fiber net and viscose fiber net. It is made of cross-laid mesh, and the two layers are combined with acupuncture reinforcement technology. Although the obtained dressing has good moisture absorption performance, the contact between the dressing and the wound (that is, the functional layer) is mainly alginate fiber and viscose fiber, and the alginate fiber absorbs the wound. Gel is formed after the exudate, and the exudate is still stored in the functional layer in contact with the wound, which still does not solve the problem of the exudate soaking the wound and healthy skin

[0010] Therefore, there is a need to develop a wound care product with high hygroscopicity but low lateral diffusion

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