FIELD: substances separation. SUBSTANCE: polyethyleneterephtalate melt is formed to produce film. Then it is hardened, thermally treated and drawn. Then it is steeped for 1.5 - 2.5 h in water solution, that has 24 - 26 vol. % of dioxane or 44 - 46 vol. % of acetone. EFFECT: simplification of process. 1 tbl
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