PELICULA DE POLIPROPILENO BIAXIALMENTE ORIENTADA ADECUADA PARA ENVOLTURA RETORCIDA

摘要

The present invention relates to a multilayer, highly transparent, biaxially orientated polypropylene film which has very good twist properties and is particularly suitable for twist wrapping. The film is characterised in that it comprises in the base layer 70-95% by weight of polypropylene and 5-30% by weight of a low-molecular-weight hydrocarbon resin having a softening point of 130-180 DEG C, and the outer layers contain an antiblocking agent having a mean particle size of 2-5 mu m and optionally contain a polydimethylsiloxane. The outer layers have a maximum thickness of 0.5 mu m. The films furthermore have good mechanical properties of approximately the same magnitude in the longitudinal and transverse directions. The film has been oriented in a balanced manner.