BIAXIALLY STRETCHED POLYPROPYLENE SHEET WITH PREFERENTIAL ORIENTATION, AND PROCESS FOR ITS MANUFACTURE

摘要

1. Biaxially oriented polypropylene film re-stretched in the longitudinal direction, which has a tensile strength of more than 300 N/mm**2 in the longitudinal direction, whereby the film has a tensile strength of more than 200 N/mm**2 in the transverse direction and contains a total amount of 0.1 to 1.0 percent by weight of one or several surfactants and 0.01 to 0.5 percent by weight of one or several nucleating agents.