Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1995-03-23
1996-11-12
Yoon, Tae
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
264 455, 2642101, 2642107, 2642902, 4283044, 4283155, B32B 326
Patent
active
055737170
ABSTRACT:
The disclosed oriented polyolefin film contains at least one voided layer. The voided layer contains an amorphous void-initiating 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.
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Dries Thomas
Murschall Ursula
Osan Frank
Peiffer Herbert
Schloegl Gunter
Hoechst Aktiengesellschaft
Yoon Tae
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