Patent ID: 6368722
Filing Date: 2002-04-09
Classification: C08J,Y10S,Y10T

Abstract:
A solid phase laminated film comprising:(a) a layer of a heat resisting resin which is soluble in a dipolar aprotic solvent as a main component, and is laminated on (b) at least one surface of a biaxially oriented thermoplastic film, wherein said biaxially oriented thermoplastic film and said heat resisting resin layer are directly joined to each other through an interface between said biaxially oriented thermoplastic film and said heat resisting resin layer, in which interface a mixed phase of both resins is present, wherein both said layers are substantially free of any intervening adhesive, and wherein said laminated film has a Young's modulus in the longitudinal direction and/or in the lateral direction of about 7 Gpa or more, wherein an interfacial adhesive force exists between said biaxially oriented thermoplastic film and said heat resisting resin layer in an amount of about 100 g/25 mm or more.