Title:
POLYETHYLENE TEREPHTHALATE REGRIND PARTICLE PROCESSING SYSTEM
Document Type and Number:
WIPO Patent Application WO2004080691
Kind Code:
A9
Abstract:
A method and apparatus for producing a polyethylene terephthalate {PET} sheet in which virgin PET granules are dried with dry air in a drying air (16) at a temperature above the glass transition temperature of PET. Regrind PET material is also dried with dry air at a temperature below the glass transition temperature. Dried virgin PET granules are air cooled in a cooling hopper (32) to a temperature below the glass transition. The cooled virgin PET granules are blended with the dried PET regrind material and the blend is then extruded into a PET sheet by extruders (54).
Inventors:
CRAWFORD ROBERT (US)
Application Number:
PCT/US2004/006815
Publication Date:
December 23, 2004
Filing Date:
March 08, 2004
Export Citation:
Assignee:
MANN & HUMMEL PROTEC GMBH (DE)
CRAWFORD ROBERT (US)
CRAWFORD ROBERT (US)
International Classes:
B29C48/797; B29C48/08; B29C48/285; B29C48/76; (IPC1-7): B29C47/10; B29C47/78
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