A tear resistant film comprises more than five layers situated one on the other in a parallel array. The layers are individually selected from a stiff polyester or copolyester, a ductile polymeric material, and optionally, an intermediate material. The stiff polyester or copolyester is oriented in at...http://www.google.es/patents/US5604019?utm_source=gb-gplus-sharePatente US5604019 - Tear resistant multilayer films and articles incorporating such films
Tear resistant multilayer films and articles incorporating such films
