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Hydrogel foam dressing and preparation method thereof

A hydrogel and hydrogel layer technology, applied in dressings, viscous dressings, non-adhesive dressings, etc., can solve the problems of insufficient capacity of wound exudate, inability to provide moisture to the wound, secondary wound damage, etc. Risk of wrong dressing, suitable for mass production, effect of reducing secondary damage

Inactive Publication Date: 2016-06-15
SHENZHEN LIFOTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its disadvantages are: for dry wounds, it cannot provide moisture to the wound; during the wound healing process, granulation tissue is easy to grow into the pores of the foam, sticking to the wound, and causing secondary damage to the wound when changing the dressing
Although the dressing is composed of hydrogel and foam, it is hoped to obtain a dressing that can not only absorb wound exudate well, but also keep the wound moist and not stick to the wound. However, in practical application, water still plays a major role. The gel dressing part, therefore, when encountering severe exudate wounds, its ability to quickly absorb a large amount of wound exudate is insufficient, and the production process of this composite dressing first needs to set up accommodating cavities on the foam, and the preparation process is complicated

Method used

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  • Hydrogel foam dressing and preparation method thereof
  • Hydrogel foam dressing and preparation method thereof
  • Hydrogel foam dressing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] see Figure 1a and 1b, a hydrogel foam dressing comprises a foam layer 11, a hydrogel layer 13 as a wound contact layer and a release film layer 14, the foam layer 11 is located on the hydrogel layer 13, and the hydrogel layer 13 is located on the release film On the layer 14, a transition layer 12 containing two materials of foam and hydrogel is formed between the foam layer 11 and the hydrogel layer 13. The transition layer 12 is composed of foam and hydrogel filled in the pores of the foam. The adhesive layer 13 is distributed with holes 15 throughout the entire layer. Among them, the foam layer 11 is a hydrophilic polyvinyl alcohol (PVA) foam with a thickness of 10mm; the hydrogel layer is a mixture of sodium 2-acrylamido-2-methylpropanesulfonate (NaAMPS) and sodium acrylate (NaAA). The copolymer has a thickness of 1.0 mm; the cross-section of the hole 15 running through the entire hydrogel layer 13 is circular. Wherein, the size of the hydrogel layer 13 is consis...

Embodiment 2

[0050] See Figure 2a and 2b , a hydrogel foam dressing comprises a backing layer 21, a foam layer 22, a hydrogel layer 24 and a release film layer 25 as a wound contact layer, the backing layer 21 is positioned on the foam layer 22, and the foam layer 22 is positioned on the water On the gel layer 24, the hydrogel layer 24 is located on the release film layer 25; a transition layer 23 containing two materials of foam and hydrogel is formed between the foam layer 22 and the hydrogel layer 24, and the hydrogel layer 24 is distributed with holes 26 throughout the hydrogel layer. Among them, the backing layer 21 is a waterproof and breathable polyurethane film; the foam layer 22 is a hydrophilic polyurethane (PU) foam with a thickness of 6mm; the hydrogel layer is sodium 2-acrylamide-2-methylpropanesulfonate (NaAMPS ) homopolymer with a thickness of 0.8 mm; the cross-section of the hole 26 running through the entire hydrogel layer 24 is a regular hexagon.

Embodiment 3

[0052] See Figure 3a and 3b , a hydrogel foam dressing comprises a foam layer 31, a hydrogel layer 33 and a release film layer 34 as a wound contact layer, the foam layer 31 is located on the hydrogel layer 33, and the hydrogel layer 33 is located on the release film On the layer 34, a transition layer 32 containing two materials of foam and hydrogel is formed between the foam layer 31 and the hydrogel layer 33, and the hydrogel layer 33 is distributed with holes 35 throughout the entire layer. Among them, the foam layer 31 is hydrophobic polyurethane (PU) foam with a thickness of 30 mm; the hydrogel layer is a copolymer of sodium acrylate (NaAA) and acrylamide (AM) with a thickness of 1.5 mm; throughout the entire hydrogel layer 33 The hole 35 has a triangular cross section.

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Abstract

The invention relates to a hydrogel foam dressing and a preparation method thereof. The hydrogel foam dressing comprises a foam layer 11, a hydrogel layer 13 serving as a wound contact layer and a release film layer 14, wherein the foam layer 11 is positioned on the hydrogel layer 13; the hydrogel layer 13 is positioned on the release film layer 14; a transition layer 12 containing foam and hydrogel is formed between the foam layer 11 and the hydrogel layer 13; and holes 15 penetrating through the whole hydrogel layer are distributed in the hydrogel layer 13. The hydrogel foam dressing provided by the invention integrates the advantages of quick absorption and drainage of wound exudate of a foam dressing and the advantages of moisture supply to wounds, creation of wet healing environment and wound adhesion prevention of a hydrogel dressing; and meanwhile, the hydrogel layer serving as the wound contact layer has self-adhesion and is convenient to use.

Description

technical field [0001] The invention relates to a medical dressing, in particular to a medical dressing composed of hydrogel and foam and a preparation method thereof. Background technique [0002] The high pace of modern society, more activities such as sports and tourism make the formation of wounds more and more frequent, and the aging population increases the chance of chronic wound formation. With the improvement of living standards, people's requirements for wound healing and comfort during treatment are also constantly increasing. In general, society's requirements for new high-performance medical dressings are constantly increasing. [0003] In recent years, the advancement of science and technology, especially the development of moist wound healing theory, has changed people's understanding of the wound healing process and wound care process. With the continuous development of material science, more and more new medical dressings are gradually becoming better Its ...

Claims

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Application Information

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IPC IPC(8): A61F13/02
CPCA61F13/00072A61F13/0213A61F13/0246A61F13/0276A61F2013/00761A61F2013/00748A61F2013/00638A61F2013/00634A61F13/01029
Inventor 付翔刘艳玲曾映
Owner SHENZHEN LIFOTRONIC TECH