FILMS WITH IMPROVED BLOCKING RESISTANCE AND SURFACE PROPERTIES

摘要

The invention discloses methods of improving blocking resistant properties a nd reducing the coefficient of friction of a multilayer film comprising providi ng at least one layer of an ethylene-propylene impact copolymer having from abo ut 3 % to about 30 % by weight ethylene, wherein said copolymer has no more tha n two peaks in the melting curve within the range from about 110 ~C to about 1 65 ~C, and wherein said layer is non-heat sealable, to a multilayer film having a core layer comprising polypropylene, high density polyethylene (HDPE) or linear low density polyethylene (LLDPE), whereby anti-blocking and coefficie nt of friction characteristics of said film is improved without necessity of adding an antiblock or slip agent.