FLEXIBLE FILM PROVIDED WITH A FINE SPHERULITIC POLYAMIDE LAYER CONTAINING NANOSCALAR, ANISOTROPIC NUCLEATING AGENTS

摘要

The invention relates to a film comprising at least one layer (I) essentiall y made of spherulitic crystallized polyamide containing solid, anisotropic nucleating fillers (A) as dispersed constituents. The film is characterized in that the fillers (A) in layer (I) have an expansion of no greater than 10 nm in the numerical weighted average of all dispersed constituents of the fille rs (A) in at least one direction (rl) which can be freely selected for each dispersed constituent. In addition, the individual spherulites in layer (I) have a diameter of a numeric average no greater than 1000 nm and no less than 100 nm in at least one plane which is perpendicular to the film surface . The numerically predominant portion of dispersed constituents of the fillers (A) in layer (I) represent the crystal nucleus of a spherulite each time. Th e invention also relates to the use of the inventive film as packaging materia l.