WATER-SOLUBLE FILM FROM POLYVINYL ALCOHOL MIXTURE, RELATED METHODS AND RELATED PRODUCTS Russian patent published in 2019 - IPC C08J5/18 C08L29/04 

FIELD: physics; chemistry.

SUBSTANCE: invention relates to water-soluble films which can be used to contact liquids, solids or combinations thereof and articles containing said film. Film contains: a mixture of polyvinyl-alcohol (PVOH) resin, which contains a first copolymer of PVOH containing a first anionic monomer link, wherein the first copolymer PVOH has a first inclusion coefficient (a₁) a first anionic monomer link; and a second PVOH copolymer containing a second anionic monomer link. Second copolymer PVOH has a second inclusion coefficient (a₂) of second anionic monomer link, wherein difference a₁ - a₂ ranges from 0.5 to 10 mol. % and the first anionic monomer link and the second anionic monomer link are identical or different.

EFFECT: technical result consists in obtaining a water-soluble film with improved solubility in water, as well as improved tensile strength and/or modulus of tensile strength.

44 cl, 3 dwg, 17 tbl, 13 ex