Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion
Reexamination Certificate
2007-03-20
2007-03-20
Nutter, Nathan M. (Department: 1711)
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Shaping by extrusion
C528S499000, C528S503000, C264S176100, C264S219000
Reexamination Certificate
active
10986129
ABSTRACT:
A process for crystallizing a polyester polymer by introducing a molten polyester polymer, such as a polyethylene terephthalate polymer, into a liquid medium at a liquid medium temperature greater than the Tgof the polyester polymer, such as at a temperature ranging from 100° C. to 190° C., and allowing the molten polyester polymer to reside in the liquid medium for a time sufficient to crystallize the polymer under a pressure equal to or greater than the vapor pressure of the liquid medium. A process flow, underwater cutting process, crystallization in a pipe, and a separator are also described.
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Ekart Michael Paul
Jernigan Mary Therese
Wells Cory Lee
Windes Larry Cates
Carmen Dennis V.
Eastman Chemical Company
Graves, Jr. Bernard J.
Nutter Nathan M.
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