WATER-SOLUBLE FILM WITH IMPROVED SOLUBILITY AND IMPROVED MECHANICAL PROPERTIES, AS WELL AS PACKETS, PRODUCED FROM IT

摘要

FIELD: chemistry.;SUBSTANCE: invention relates to water-soluble films. Water-soluble film has suitable thickness and contains, at least, 50 wt % of water-soluble resin, based on polyvinyl alcohol (PVA), resin, having average viscosity in the range from approximately 13.5 sP to approximately 20 sP and degree of hydrolysis in the range from approximately 84% to approximately 92%, film in addition has not more than 30 wt % of PVA-polymer, which has average viscosity lower than approximately 11 sP, in addition, film is characterised by solubility index in the range from approximately 620 to approximately 92, when film is approximately 76 micron thick, and stress index in the range from approximately 145 to approximately 626, when film is approximately 76 micron thick, and where film is thermally mouldable. Sack, containing water-soluble film, is also claimed.;EFFECT: water-soluble films and sacks, containing water-soluble films, have good cold water solubility, moisture resistance in treatment with wet hands and good mechanical properties.;9 cl, 15 tbl, 3 dwg