Hydrophilic polyurethane, hydrophilic polyurethane foaming body and made wet-type wound dressing

Abstract

A Hydrophilic polyurethane provided by the invention is made: a first polyether polyol and the polyisocyanates are acted, the second polyether polyol and transparent hyaluronic acid are acted to obtain star-shaped block polyurethane. The first polyether polyol includes at least three polyether polyols. The present invention further provides a hydrophilic polyurethane foaming body made by the hydrophilic polyurethane ad the foaming body, and the holes are non-continuous sealing holes. The present invention further provides wet-type wound dressing comprising a sheet absorbed layer which has the materials of the hydrophilic polyurethane or the hydrophilic polyurethane foaming body. The wet-type wound dressing can make the wound wet and prompt the wound cure and can effectively absorb the wound liquid.

Description

technical field [0001] The invention relates to a polyurethane, in particular to a hydrophilic polyurethane, a hydrophilic polyurethane foam and a prepared wet wound dressing. Background technique [0002] Due to the improvement of health awareness, more attention has been paid to wound care after surgery. Therefore, various wound dressings that can prevent infection and protect wounds have been developed one after another. [0003] In order to further promote wound healing, active ingredients (for example: alginate, hyaluronic acid or its salts, bismuth subgallate, etc.) that can promote wound healing are usually mixed in the dressing base material or coated on the surface, However, blending or coating not only requires additional processing technology, but also these additional active ingredients are easily lost and lost, requiring frequent dressing changes (within about 5 to 7 days), and may also decrease due to active ingredients being absorbed by the dressing substrate....

AI Technical Summary

Problems solved by technology

[0003] In order to further promote wound healing, active ingredients (for example: alginate, hyaluronic acid or its salts, bismuth subgallate, etc.) that can promote wound healing are usually mixed in the dressing base material or coated on the surface, However, blending or coating not only requires additional processing technology, but also these additional active ingredients are easily lost and lost, requiring frequent dressing changes (within about 5 to 7 days), and may also decrease due to active ingredients being absorbed by the dressing substrate. The dressing has limited effect on the absorption of wound exudate and wound healing

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