Thermoplastic laminated film

Claim 1

A thermoplastic laminated film comprising a base film made of thermoplastic resin and a layer formed on at least one side of said base film sufficient to increase the adhesiveness of said base film to hydrophilic polymers, hydrophobic polymers and inorganic substances, wherein said layer is made of a composition comprising (a) at least one natural or synthetic film-forming material which is soluble, emulsifiable or dispersible in water and (b) an organic boron polymer or a mixture composed of about 5:95 to about 95:5 by weight of an organic boron polymer and vinyl alcohol polymer, wherein said vinyl alcohol polymer is equivalent to polyvinyl alcohol with a degree of saponification of at least 70% and a degree of polymerization of at least 100, said organic boron polymer being at least one of the polymers having a repeating unit I or II: ##STR25## wherein p is 10 to 10,000; q is 0 or 1; and when q is 1, A is --(X) l --(Y) m --(Z) n-- , wherein X and Z are independently hydrocarbon groups with an ether linkage and containing 100 carbon atoms or less; Y is ##STR26## wherein R is a hydrocarbon group containing 1 to 34 carbon atoms, or ##STR27## wherein R' is a hydrocarbon group containing 2 to 13 carbon atoms, and l, m, and n are independently 0 or 1, wherein the relative proportion by weight of (a) to (b) is about 95:5 to about 5:95.