WATER-SOLUBLE FILMS, WATER-SOLUBLE SINGLE DOSE PRODUCTS, METHODS OF THEIR PRODUCTION AND USE Russian patent published in 2024 - IPC C08J5/18 B65D65/46 C11D17/04 

FIELD: manufacturing technology.

SUBSTANCE: group of inventions relates to water-soluble single dose products. Water-soluble single dose article has at least two compartments, optionally contains a composition in at least one of them, comprises a first water-soluble film which has a first side and a second side and comprises a first PVA resin; second water-soluble film, which has a first side and a second side and contains a second PVA resin, which has an average viscosity in range of 8 mPa·s up to less than 12 mPa·s; a third water-soluble film having a first side and a second side and comprising a third PVA resin; first side of first film is tightly connected to second side of second film to create first compartment, the first side of the second film is tightly connected to the second side of the third film to create at least the second compartment, the second compartment is located above the first compartment. Also disclosed is a method of making a water-soluble single dose product.

EFFECT: group of inventions provides both excellent dissolution and acceptable structural integrity of the film.

22 cl, 2 dwg, 4 tbl, 1 ex