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

US8697624B2 · kind B2 · utility

Assignee

• The Procter & Gamble Company · US

Inventors

• Frank William Denome · Cincinnati, US
• Steven G. Friedrich · Crown Point, US
• Regine Labeque · Neder-Over-Heembeek, BE
• David M. Lee · Los Alamos, US
• Jichun Shi · Monroe, US
• Andrew P. Verrall · Crown Point, US
• Roxane Rosmaninho · Auderghem - Oudergem, BE

Key dates

• Filing date: Jan 31, 2011
• Grant date: Apr 15, 2014
• Expiry date: Apr 28, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/1345
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

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.