Patent ID: 6509072
Filing Date: 2003-01-21
Classification: B32B,B65D,Y10T

Abstract:
A multi-layer film, suitable for construction into bags for containing solid or liquid substances that adversely affect one or more layers of said film comprising:a structural layer of water-soluble film material suitable for forming an outer layer of the bag and having sufficient thickness to provide strength for use and handling when made into the bag to contain the substance; and a barrier layer, which is a film, suitable for forming an inner layer of the bag and affixed to spaced apart discrete areas of said structural layer, each of said discrete areas of sufficient size to form an interior surface of a bag without the structural layer forming an interior surface of the bag, said barrier layer lacking sufficient structural integrity and strength to contain the contents of the bag once the structural layer is dissolved, said barrier layer being less reactive than said structural layer with the substance to be packaged, said spaced apart discrete areas being spaced from each other by an area of said water-soluble film material having no barrier layer thereon and being of sufficient size for forming a bag seal.