Pre-foamed particles of uncrosslinked, linear low-density polyethylene and production method thereof
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United States of America Patent
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Aug 14, 1990
Grant Date -
N/A
app pub date -
Jun 8, 1988
filing date -
Jun 23, 1987
priority date (Note) -
Expired
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Abstract
Pre-formed particles of an uncrosslinked, linear low-density polyethylene have a crystalline structure characterized in that two endothermic peaks appear on a DSC curve obtained by differential scanning calorimetry of the pre-foamed particles (said DSC curve having been obtained by heating 1-5 mg of the pre-foamed particles to 220.degree. C. at a rate of 10.degree. C./min by a differential scanning calorimeter) and the energy at the endothermic peak on the higher-temperature side is 5 J/g or more. A process for the production of the pre-foamed particles of the uncrosslinked, linear low-density polyethylene is also disclosed.
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