ORIENTED POLYOLEFIN FILM WITH AMORPHOUS POLYMER, A PROCESS FOR ITS PRODUCTION AND ITS USE

摘要

The disclosed oriented polyolefin film contains at least one voided layer. The voided layer contains an amorphous voidinitiating polymer which, after orienting, is present as a separate particle inside the void. In the process for producing the polyolefin film, a molten blend comprising an olefin polymer and the amorphous polymer is extruded through a die at an extrusion temperature above the glass temperature or Vicat softening point of the amorphous polymer, the resulting film is drawn off on one or more rollers, and is then subjected to stretch orientation, followed optionally by thermofixing and a surface treatment.