Microfractured film and method for making

A method for imparting hand-tearability to an organic polymeric film, the method comprising:

• impinging a multiplicity of ceramic microblades on a major surface of the organic polymeric film so that at least some of the ceramic microblades penetrate partially through a thickness of the organic polymeric film to generate microfractures for imparting hand-tearability therein, wherein the ceramic microblades have a pattern of angular orientation of a length direction of individual microblades relative to each other and relative to a transverse axis of a supporting substrate on which the microblades are disposed, wherein a first subset of the ceramic microblades are of a first shape and a second subset of the ceramic microblades are of a second shape that differs from the first shape, and wherein the microfractures are irregularly shaped cavities that are not identical to each other and no microfracture is a mirror image of a corresponding ceramic microblade that penetrated into the organic polymeric film to form any of the microfractures;
• and,
• separating the organic polymeric film from the multiplicity of ceramic microblades.