IMPROVED WATER-SOLUBLE FILM HAVING BLEND OF PVOH POLYMERS, AND PACKETS MADE THEREFROM

• Main Authors: LEBEQUE, REGINE, SHI, JICHUN, FRIEDRICH, STEVEN G, LEE, DAVID M, DENOME, FRANK WILLIAM, ROSMANIHO, ROXANE, VERRALL, ANDREW P
• Format: Patent
• Language: English; Spanish
• Published: 11.02.2013
• 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. En la presente descripción se describen películas solubles en agua plastificadas con características de solubilidad en agua fría, manipulación en húmedo y termoformado favorables, y que pueden incluir una resma de PVOH conformada por una mezcla de dos o más polímeros de PVOH en donde, cada uno, tiene una distribución monomodal del peso molecular, y la resma de PVOH se caracteriza porque tiene una viscosidad que está en un intervalo de aproximadamente 13.5 cP a aproximadamente 20 cP (o un peso molecular promedio ponderado correspondiente), un grado de hidrólisis de aproximadamente 84 % a aproximadamente 92 %, un valor de índice de polidispersidad en un intervalo de aproximadamente 1 a aproximadamente 5, un contenido de agua residual de aproximadamente 4 % en peso a aproximadamente 10 % en peso, y un valor de índice de selección de resma en un intervalo de 0.255 a 0.315; métodos para elaborar las películas; composiciones que incluyen resinas de PVOH para elaborar las películas; y bolsas y paquetes elaborados a partir de las películas.