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Hydrogel type dressing containing aqueous emulsion of polyurethane for trauma and preparation method

A wound dressing and polyurethane technology, applied in medical science, bandages, absorbent pads, etc., can solve problems such as difficult to realize industrial production, unfavorable absorption of exudate, complex equipment and process, etc., to save time, feel comfortable on the skin, and simple preparation process Effect

Inactive Publication Date: 2005-01-12
杭州拜康医用产品有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this patent does not need to use other additive components to prevent the discomfort caused by the addition of additives to the human body, in the preparation process, electron beam or γ-ray irradiation is used, which is costly and complicated in equipment and technology, making it difficult to realize industrialization Production
Moreover, after irradiation with electron beams, the degree of cross-linking is high, which is unfavorable for the absorption of exudate

Method used

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  • Hydrogel type dressing containing aqueous emulsion of polyurethane for trauma and preparation method
  • Hydrogel type dressing containing aqueous emulsion of polyurethane for trauma and preparation method

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preparation example Construction

[0023] The preparation method of the polyurethane hydrogel of the present invention is as follows: by heating, polyvinyl alcohol, polyvinyl pyrrolidone, and polyurethane water emulsion are fully mixed with plasticizers, physical cross-linking agents, etc. to undergo physical cross-linking, and then rapidly cured at low temperature to form. That is: disperse a certain amount of polyvinyl alcohol in water, heat it to dissolve, then add polyvinylpyrrolidone, polyurethane aqueous emulsion, plasticizer, physical crosslinking agent, etc. into the polyvinyl alcohol solution in sequence, continue heating and stirring to make It is fully mixed for a certain period of time, and the stirring is stopped to make the defoaming solution transparent. Then, the prepared solution is coated on the non-woven fabric by the coating method, and it is solidified rapidly at low temperature, covered with a layer of silicon-containing release paper, cut and packaged. Finally, radiation sterilization was...

Embodiment 1

[0032] Disperse 14.1% polyvinyl alcohol in 70.7% water by weight, heat it to dissolve, then mix 5.66% polyvinylpyrrolidone, 0.99% polyurethane water emulsion, 7.07% glycerin, 1.41% sodium dihydrogen phosphate and dihydrogen phosphate Add the mixed solution of sodium into it, stir for a certain period of time under the heating condition of 80-100 ℃, stop stirring to make the solution degassed and become transparent, then coat it on the non-woven fabric, and after it is rapidly cured at low temperature, cover it with a layer Silicone-containing release paper, cut, sealed and stored, sterilized by irradiation with Co60.

Embodiment 2

[0034] Disperse polyvinyl alcohol with a weight ratio of 5.08% in 63.5% water, heat it to dissolve, then add 25.4% polyvinylpyrrolidone, 3.80% glycerin, 0.1% polyurethane aqueous emulsion, 1.81% sodium dihydrogen phosphate and disodium hydrogen phosphate The mixed solution is stirred for a certain period of time under the heating condition of 80-100 ℃, and when the stirring is stopped to make the solution degassed and becomes transparent, it is coated on the non-woven fabric, and after the low temperature is rapidly solidified, it is covered with release paper, cut, Keep it sealed and sterilize it by irradiation with Co60.

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Abstract

A hydrogel-type dressing containing polyurethane emulsion for protecting and treating the wound of burn, scald and trauma is prepared from polyvinyl alcohol, polyvinyl pyrrolidone, water, aquatic emulsion of polyurethane, plasticizer, and physical cross-linking agent through proportionally mixing, and heating while physical cross-linking.

Description

technical field [0001] The invention relates to a wound dressing and a preparation method thereof, in particular to a hydrogel type wound dressing containing polyurethane aqueous emulsion and a preparation method thereof. The wound dressing is mainly suitable for the protection and treatment of burns, scalds and traumatic wounds . Background technique [0002] In the prior art, wound dressings have developed greatly in recent decades, and many new types of dressings have emerged. Although these dressings are different from traditional gauze in appearance, they are still mainly made of film and fiber non-woven materials. , Functionally, they can actively participate in and influence the healing speed and quality of the wound. With the increasingly extensive and in-depth research on wound dressings and the development of related disciplines, people's understanding of wound dressings has become more comprehensive and deepened. According to the current understanding, an ideal ...

Claims

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Application Information

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IPC IPC(8): A61L15/26
Inventor 朱跃萍王雪亮郭冬梅
Owner 杭州拜康医用产品有限公司
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