Improved water-soluble film having blend of PVOH polymers, and packets made therefrom

• Main Authors: SHI JICHUN, ROSMANIHO ROXANE, VERRALL ANDREW P, LABEQUE REGINE, DENOME FRANK WILLIAM, FRIEDRICH STEVEN G, LEE DAVID M
• Format: Patent
• Language: English
• Published: 17.06.2015
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES; CANDLES; CHEMISTRY; CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; CONVEYING; DETERGENT COMPOSITIONS; DETERGENTS; FATTY ACIDS THEREFROM; HANDLING THIN OR FILAMENTARY MATERIAL; MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGINGARTICLES OR MATERIALS; METALLURGY; PACKAGES; PACKAGING ELEMENTS; PACKING; PERFORMING OPERATIONS; RECOVERY OF GLYCEROL; RESIN SOAPS; SOAP OR SOAP-MAKING; STORING; TRANSPORTING; UNPACKING; USE OF SINGLE SUBSTANCES AS DETERGENTS

Disclosed are plasticized, water-soluble films having favorable cold-water solubility, wet handling, and thermoforming characteristics, and which can include a PVOH resin made up of blend of two or more PVOH polymers each having a monomodal molecular weight distribution, and the PVOH resin characterized by a viscosity in a range of about 13.5 cP to about 20 cP (or a corresponding weight average molecular weight), a degree of hydrolysis of about 84% to about 92%, a polydispersity index value in a range of about 1 to about 5, a residual water content of about 4 wt. % to about 10 wt. %, and a Resin Selection Index value in a range of 0.255 to 0.315; methods of making the films; compositions including PVOH resins for making the films; and pouch and packet articles made from the films.