A negative pressure wound dressing product, its preparation method, and its application

By preparing silver-containing polyurethane foam materials, the problems of insufficient antibacterial properties and limited water absorption of polyurethane foam materials were solved, achieving the effects of highly efficient antibacterial and rapid absorption of exudate, thus improving the clinical healing efficiency of negative pressure drainage wound care products.

CN121754708BActive Publication Date: 2026-05-26GUANGZHOU HUAYI BIOTECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GUANGZHOU HUAYI BIOTECHNOLOGY CO LTD
Filing Date
2026-03-05
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing polyurethane foam materials have insufficient antibacterial properties and limited water absorption in negative pressure wound care products, making it difficult to effectively control the proliferation of endogenous bacteria in the wound and treat high exudates.

Method used

By using silver-containing polyurethane foam material and adjusting the hydroxyl value and viscosity of the polyol, combined with a specific ratio of surfactant, a uniform and interconnected pore structure is prepared to ensure the uniform dispersion of nano-silver, thereby enhancing antibacterial properties and water absorption.

Benefits of technology

It significantly improves antibacterial properties and water absorption rate, can quickly absorb and lock in exudate, prevent backflow, maintain a moist environment on the wound, enhance tear strength, and ensure treatment continuity and patient comfort.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention belongs to the technical field of wound care products, specifically relating to a negative pressure drainage wound care product and its preparation method and application. The negative pressure drainage wound care product includes a wound contact layer, an absorbent layer, and a release film; the absorbent layer is silver-containing polyurethane foam; the preparation method of the silver-containing polyurethane foam includes the following steps: (1) preparing a silver dispersion; (2) mixing a mixed polyol, ethylenediamine, a foaming agent, a surfactant, triethylenediamine, and the silver dispersion to obtain dispersion A; (3) adding hexamethylene diisocyanate to dispersion A and mixing to obtain dispersion B; pouring dispersion B into a mold, curing, and drying to obtain silver-containing polyurethane foam. The silver-containing polyurethane foam prepared by this invention has high-efficiency liquid absorption and good antibacterial effect, which helps to improve the quality of negative pressure drainage wound care products.
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