HEAT-SHRINKABLE PET FILM AND METHOD FOR MAKING THE SAME
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United States of America Patent
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Issued Date -
Mar 6, 2008
app pub date -
Aug 29, 2007
filing date -
Sep 1, 2006
priority date (Note) -
Abandoned
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Abstract
A PET material of a modified PET composition includes: terephthalic acid; ethylene glycol; a modifier; and a chain branching agent selected from one of a non-cyclic compound and a cyclic compound. The non-cyclic compound has at least three functional groups, and the cyclic compound, after ring opening, has at least three functional groups. Each of the functional groups of each of the non-cyclic compound and the cyclic compound is selected from hydroxyl group, carboxyl group, amine group, epoxy group, NCO, and COOR, in which R represents a C.sub.1-C.sub.18 alkyl group.
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