Polyurethane foam dressing having bacterium resistance

A polyurethane foam, water-based polyurethane technology, applied in medical science, bandages, absorbent pads, etc., can solve problems such as damage to new tissue, dressing pain, granulation tissue easily growing into pores, etc., to prevent excessive loss and enhance the shielding effect.

Inactive Publication Date: 2020-07-03
CHANGCHUN A&Z SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pores of foam dressings are generally relatively large, and the granulation tissue on the wound surface tends to grow into the pores when the dressing is applied for a long time. When the dressing is replaced, it will cause pain and damage the new tissue, and the excessively large pores are not conducive to the shielding of bacteria.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] In terms of parts by weight, weigh 60 parts of polyester polyol, 2.5 parts of triethanolamine, 7 parts of sodium lauryl sulfate, 30 parts of isocyanate and 0.5 parts of anti-yellowing agent and heat them to 26 ° C, and turn them at 600 rpm. Mix and stir for 30 seconds at a stirring speed of 1 / min, quickly pour the mixture into a foaming mold at a temperature of 50°C for foaming molding, and place it in an oven to mature for 60 minutes after molding, take it out and place it at room temperature for 24 hours to obtain a soft polyurethane foam. The length of the parts by weight is 1 mm, and the short hollow silver-loaded polyester fibers are uniformly dispersed in the soft polyurethane foam to obtain a polyurethane foam dressing with antibacterial properties.

Embodiment 2

[0019] Weigh 63 parts of polyether polyol, 2.8 parts of triethanolamine, 8 parts of sodium lauryl sulfate, 35 parts of isocyanate and 1 part of anti-yellowing agent and heat them to 27 ° C. Mix and stir for 28s, quickly pour the mixture into a foaming mold at a temperature of 60°C for foaming molding, place it in an oven after molding for 55 minutes, take it out and place it at room temperature for 24 hours to obtain a soft polyurethane foam, and put the weight parts Hollow silver-loaded short polyester fibers with a length of 2 mm were evenly dispersed in soft polyurethane foam to obtain a polyurethane foam dressing with antibacterial properties.

Embodiment 3

[0021] Weigh 65 parts of polyether polyol, 3 parts of DMEA, 9 parts of sodium lauryl sulfate, 40 parts of isocyanate and 2 parts of anti-yellowing agent and heat them to 28 °C, and mix and stir at a stirring speed of 1200 rpm 25s, quickly pour the mixture into a foaming mold at a temperature of 70°C for foaming molding, and place it in an oven to mature for 50 minutes after molding, take it out and place it at room temperature for 24 hours to obtain a soft polyurethane foam, and the length of the weight part is 3mm hollow silver-loaded short polyester fibers were uniformly dispersed in soft polyurethane foam to obtain an antibacterial polyurethane foam dressing.

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PUM

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Abstract

The invention discloses polyurethane foam dressing having bacterium resistance, belongs to the technical field of composite materials, and solves the technical problem that existing dressing is too large in holes, so that the existing dressing is disadvantageous to shielding of bacteria. The polyurethane foam dressing having bacterium resistance comprises the following components in parts by weight of 60-65 parts of waterborne polyurethane prepolymers, 2.5-3 parts of a catalyst, 7-9 parts of a surfactant, 30-40 parts of isocyanate, 0.5-2 parts of an anti-yellowing agent and 2-4 parts of hollowsilver-loaded polyester discontinuous fibers. According to the polyurethane foam dressing disclosed by the invention, the hollow silver-loaded polyester discontinuous fibers are uniformly dispersed in soft polyurethane foam, the polyurethane foam dressing having bacterium resistance is obtained, excessive dissipation of moisture caused by large holes is prevented, and the shielding effect of thefoam dressing on bacteria can be reinforced.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a polyurethane foam dressing with antibacterial properties. Background technique [0002] Polyurethane (PU) is a general term for a class of polymers whose main chain contains carbamate (-NHCOO-) units. It is formed by the gradual addition and condensation of polyols, polyisocyanates and small molecule chain extenders. multi-block copolymers. A large number of animal experiments and acute and chronic toxicity experiments have confirmed that medical polyurethane is non-toxic, non-antigenic, physiologically inert, and has good blood and tissue compatibility, so it is widely used in the field of wound dressings. [0003] Foam-type medical dressing has a porous structure, is almost completely permeable to oxygen and carbon dioxide, and has a strong water absorption capacity. It mainly maintains a moderately moist environment on the wound surface through the absorption of e...

Claims

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Application Information

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IPC IPC(8): A61L15/42A61L15/46A61L15/26
CPCA61L15/26A61L15/425A61L15/46A61L2300/104A61L2300/404C08L75/04
Inventor 李金歌饶尚锦陈兆彬王杰
Owner CHANGCHUN A&Z SCI CO LTD
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