Method for the production of clear bottles having improved reheat
AssigneeEastman Chemical Company
InventorsBrian Edison Maxwell, Philip Edward Gibson
Life of this patent
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Abstract
Disclosed herein is a thermoplastic polymer composition comprising a blend of a thermoplastic polymer admixed with from about 5 to 50 ppm black iron oxide particles, based on the amount of said thermoplastic polymer. The black iron oxide is admixed with the polymer in order to speed up the process of reheating parisons formed from the polymer during bottle manufacturing. The composition has the beneficial combination of a large percent reheat rate improvement (RIV) with only a small decrease in transparency (.DELTA.L*). The ratio of RIV/.DELTA.L* is significantly better than carbon black--polymer blends having similar RIV.
Claims7
A thermoplastic polymer composition comprising a blend of polyester admixed with from about 5 to 50 ppm black iron oxide particles, based on the amount of said polyester, wherein said composition has a ratio of percent reheat rate improvement to transparency change (RIV/.DELTA.L*) greater than about 2.0, wherein the RIV and .DELTA.L* are determined based on a composition that is the same except for an absence of iron oxide.
Dependencies are inferred from the claim text.