Medical hydrogel moisturizing eye care mask and preparation method thereof
A hydrogel and eye patch technology, which is applied in the field of medical supplies, can solve the problems of rough skin contact of hydrogel, yellow and hard color of hydrogel, side effects of human body, etc., so as to improve the effect of skin contact and performance. , the effect of good transparency
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Embodiment 1
[0018] Mix 5% medical grade polyvinyl alcohol, 5% glycerin, 5% chitosan and 85% pure water by weight, stir at 60r / min for 2 hours, let it stand for 2 hours after cooling at room temperature, and cast it to obtain Hydrogel semi-finished products, these hydrogel semi-finished products are processed by freezing and thawing method (freezing temperature is -18°C, freezing time is 20h, thawing temperature is 25°C, thawing time is 6h, a total of three cycles), using cobalt 60 is a radiation source, the radiation dose is 5kGy, and the rate of the radiation dose is 0.5kGy / h for radiation sterilization to obtain the hydrogel product (eye protection patch) of the present invention.
Embodiment 2
[0020] Mix 20% medical grade polyvinyl alcohol, 1% glycerin, 0.1% chitosan and 78.9% pure water by weight, stir at 150r / min for 1 hour, let it stand for 8 hours after cooling at room temperature, and cast to obtain Hydrogel semi-finished products, these hydrogel semi-finished products are treated by freezing and thawing method (freezing temperature is -20°C, freezing time is 16h, thawing temperature is 20°C, thawing time is 8h, a total of three cycles), using cobalt 60 is a radiation source, the radiation dose is 25kGy, and the rate of the radiation dose is 0.5kGy / h to carry out radiation sterilization to obtain the hydrogel product (eye protection patch) of the present invention.
Embodiment 3
[0022] Mix 12% medical grade polyvinyl alcohol, 3% glycerin, 3% chitosan and 82% pure water by weight, stir at 100r / min for 1.5 hours, let it stand for 5 hours after cooling at room temperature, and cast to obtain Hydrogel semi-finished products, these hydrogel semi-finished products are processed by freezing and thawing method (freezing temperature is -25°C, freezing time is 12h, thawing temperature is 30°C, and thawing time is 3h, a total of three cycles), using cobalt 60 is a radiation source, the radiation dose is 15kGy, and the rate of the radiation dose is 0.5kGy / h to sterilize by irradiation to obtain the hydrogel product (eye protection patch) of the present invention.
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