Patent ID: 6956070
Filing Date: 2005-10-18
Classification: B29D,B29K,C08F,C08J,Y10T

Abstract:
1. A water-soluble film comprising a modified polyvinyl alcohol which comprises an N-vinylamide monomer unit in an amount of 1 to 10 mole percent, and a carboxyl group and a lactone ring in a total amount of 0.020 to 4.0 mole percent in the molecule, and having a degree of polymerization of 300 to 3000, and a degree of hydrolysis of 75 to 99.5 mole percent wherein said N-vinylamide monomer unit is at least one selected from the group consisting of N-vinyl-2-caprolactam and the monomers represented by formula (I): wherein R