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

A technology of wound dressing and multi-layer structure, applied in the field of wound dressing, which can solve the problems of low lateral diffusion, inability to keep the surface of the dressing dry, and not solve the problems of exudate impregnation of the wound and healthy skin

Pending Publication Date: 2018-01-26
FOSHAN UNITED MEDICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 combi...

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] Example 1: A wound dressing with a three-layer structure.

[0073] figure 1 It is a structure diagram of a wound dressing with a three-layer structure. see figure 1 , the wound dressing with a three-layer structure in this embodiment has a liquid conduction layer 1, a liquid storage layer 2 and an outer protective layer 3, wherein the liquid conduction layer: contains 75% by weight of polypropylene fiber, 25% by weight of viscose fiber. Among them, the fineness of polypropylene fiber is 2.0dtex and the length is 38mm; the fineness of viscose fiber is 1.67dtex and the length is 38mm. The two fibers are weighed in proportion and mixed, and then opened, carded, laid, and needled to form a liquid-conducting layer of needle-punched nonwoven fabric, with a grammage of 310 grams per square meter.

[0074] Reservoir: Contains 50% superabsorbent cross-linked acrylic fibers by weight, 50% lyocell fibers by weight. The superabsorbent cross-linked acrylic fiber has a fineness ...

Embodiment 2

[0084] Example 2: A wound dressing with a four-layer structure.

[0085] image 3 It is a structure diagram of a wound dressing with a four-layer structure. see image 3 , in this embodiment, the wound dressing with four-layer structure includes a liquid conduction layer 1, a liquid storage layer 2, a buffer layer 4 and an outer protective layer 3, wherein the liquid conduction layer: contains 70% by weight of polypropylene fibers, 30 % by weight lyocell fibers. The fineness of polypropylene fiber is 2.0dtex and the length is 38mm; the fineness of lyocell fiber is 1.7dtex and the length is 51mm. The two fibers were weighed in proportion and mixed, and then opened, carded, laid, and needled to make a liquid-conducting layer of needle-punched non-woven fabric, with a grammage of 270 grams per square meter.

[0086] Reservoir: Contains 50% superabsorbent cross-linked acrylic fibers by weight, 50% polypropylene fibers by weight. The superabsorbent cross-linked acrylic fiber h...

Embodiment 3

[0093] Example 3: A wound dressing having a four-layer structure, wherein the reservoir layer contains an antimicrobial agent.

[0094] In this embodiment, the wound dressing has a four-layer structure including a liquid transfer layer, a liquid storage layer, a buffer layer and an outer protective layer. Wherein, the liquid conduction layer: contains 75% by weight of polypropylene fiber and 25% by weight of calcium alginate fiber. The fineness of the polypropylene fiber is 2.0dtex and the length is 38 mm; the fineness of the calcium alginate fiber is 2.5 dtex and the length is 51 mm. The two kinds of fibers are weighed in proportion and mixed, and after opening, carding, laying and needle punching, the liquid conducting layer of needle punched non-woven fabric is made, and its grammage is 250 g / m2.

[0095] Liquid storage layer: Contains 60% by weight of superabsorbent cross-linked acrylic fibers, 40% by weight of silver-containing calcium alginate fibers, and the silver con...

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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 ...

Claims

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Application Information

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IPC IPC(8): A61F13/02A61L15/42A61L15/44A61L15/46
Inventor 莫小慧王晓东王锐
Owner FOSHAN UNITED MEDICAL TECH
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