PVA film products belong to green environmental protection materials. The biooxygen consumption (BOD) of PVA was measured to be much lower than that of starch, and after five days of biodegradation of Airvol's PVA product, the amount of BOD measured by Air Products of America was less than 1% of the

Company with research, development, production and sales, protect the polymer materials as the main business, adhering to the "innovative achievements in the beauty of life" concept, the production of the closed negative pressure drainage system "VAK and siphon materials, widely used in orthopedics,