| 摘要 |
A process to reduce blocking in flat or tubular films made from ethylene or propylene polymers or copolymers, without reducing their optical properties, is characterized by the fact that a small amount of at least one graft copolymer of ethylene or propylene and at least one vinylaromatic polymer, possibly mixed with one or more acrylic and/or dienic monomers, is added to the polymers or copolymers at some point during production of the films; the graft copolymer is obtained in particular by grafting styrene on a substrate of non-crosslinked polythene. |
