FIELD: chemistry.
SUBSTANCE: invention relates to a composition for producing a biodegradable polymer film material and can be used in biomedicine and pharmacology, for example disposable instruments, packaging materials, capsules, in food industry, for example, packaging material and basic necessities, in agriculture, for example, biodegradable films. Composition for producing a biodegradable polymer film material contains the following components in the following ratio, wt.%: starch 0.2–0.5, chitosan 0.8–1.3, polyvinyl alcohol 0.4–0.9, glycerine 1.2–1.8, citric acid 0.05–0.08, black tea extract 0.7–1.2, acetic acid 0.33–0.65, water – the rest. Invention also relates to a biodegradable polymer film material based on a composition for producing a biodegradable polymer film material.
EFFECT: high strength of the obtained film, namely increased breaking stress, reduced degree of water vapor sorption, preservation of biodegradation time.
2 cl, 1 dwg, 1 tbl, 12 ex
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