STRETCHED POLYOLEFIN MATERIALS AND OBJECTS PRODUCED THEREFROM
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United States of America Patent
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Issued Date -
Jul 15, 2010
app pub date -
Feb 5, 2008
filing date -
Feb 5, 2007
priority date (Note) -
Abandoned
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Abstract
The invention is directed to stretched polyolefin materials having an E-modulus of at least 17 GPa, preferably at least 20 GPa and a strength of at least 400 MPa, comprising a polyolefin and a nano-material, such as a nucleating agent, which material is obtainable by a process comprising a stretching step wherein the material is stretched at a stretch ratio of at least 16. The materials of the invention can be produced by a process comprising the steps of: providing a compound of a polyolefin material and a nano-material, e.g. a nucleating agent, wherein the nano-material is dispersed preferably on a molecular scale in the polyolefin material, extruding this compound, followed by a stretching step wherein the material is stretched to a total stretch ratio of at least 16.
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