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

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 character...

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Hauptverfasser: FRIEDRICH, STEVEN G, SHI, JICHUN, LEE, DAVID M, DENOME, FRANK WILLIAM, ROSMANIHO, ROXANE, VERRALL, ANDREW P, LABEQUE, REGINE
Format: Patent
Sprache:eng
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Zusammenfassung: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.