Direct coupling of melt polymerization and solid state...

Details Direct coupling of melt polymerization and solid state... Direct coupling of melt polymerization and solid state...

2007-04-17

2007-04-17

Lee, Edmund H. (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

To form particulate product

C264S005000, C264S012000

Reexamination Certificate

active

10663856

ABSTRACT:
Strands of molten polyethylene terephthalate (PET) from a PET polycondensation reactor are solidified, pelletized, and cooled only to a temperature in the range of 50° C. to a temperature near the polymer Tg by contact with water. The still hot pellets are conveyed, optionally followed by drying to remove water, to a PET crystallizer. By avoiding cooling the amorphous pellets to room temperature with water and cool air, significant savings of energy are realized.

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Copy of International Search Report PCT/US04/27248 filed Aug. 23, 2004.

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