Polyvinyl alcohol film and preparation method therefor
AssigneesAnhui Wanwei Updated High-Tech Material Industry Co.,Ltd, Anhui Wanwei Advanced Functional Membrane Materials Research Institute Co., Ltd
InventorsFusheng WU, Chenghong TANG, Xueyi XIANG, Xianwu SUN, Qianlei ZHANG, Xiaoxi WANG, Jiaming LI, Tao LIU, Daoliang WANG
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Abstract
Disclosed are a polyvinyl alcohol film and a preparation method therefor. The saturated water absorption of the amorphous structure in the polyvinyl alcohol film is x, the water absorption increased due to destruction of the crystal surface defect structure in the polyvinyl alcohol film is y, and x/(x+y) is 0.82 to 0.93. The polyvinyl alcohol film has a softening point of 65° C. to 75° C., and a degree of swelling of 180% to 220%.
Claims12
A polyvinyl alcohol film, wherein saturated water absorption of an amorphous structure in the polyvinyl alcohol film is x, water absorption increased due to destruction of a crystal surface defective structure in the polyvinyl alcohol film is y, and x/(x+y) is 0.82 to 0.93;
- the polyvinyl alcohol film has a softening point of 65° C. to 75° C. and a degree of swelling of 180% to 220%.
Dependencies are inferred from the claim text.