Plastic and nonmetallic article shaping or treating: processes – Vacuum treatment of work
Patent
1993-02-09
1994-05-03
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
Vacuum treatment of work
159 22, 264102, 26421123, 264349, 264DIG69, 425203, 425204, 425205, 4253823, B29C 4740
Patent
active
053085620
ABSTRACT:
A process and apparatus for the production of a polymer of thermoplastic polycondensate in which the polymer is first treated in a screw extruder and then in a mixing tank. In the extruder the polycondensate is heated in a first zone to a temperature below its melting point and thereafter it is heated to a temperature above its melting point at a vacuum. Water and other volatile components are removed from the first and second zones of the extruder. In the mixing tank the polymer is maintained under vacuum conditions and is conveyed and mixed by spiral mixing blades to remove residual water and volatile components. The polymer is discharged at the bottom of the mixing tank by a melt pump after a residence time of between 5 and 60 minutes in the mixing tank.
REFERENCES:
patent: 3357478 (1967-12-01), Donovan
patent: 3486864 (1969-12-01), Van Der Schee et al.
patent: 3508683 (1970-04-01), Van Der Schee
patent: 3553171 (1971-01-01), Ocker
patent: 3619145 (1971-11-01), Crawford et al.
patent: 3787160 (1974-01-01), Leister
patent: 3797550 (1974-03-01), Latinen
patent: 3963679 (1976-06-01), Ullrich et al.
patent: 4107787 (1978-08-01), Ocker
patent: 4409167 (1983-10-01), Kolouch et al.
patent: 5102594 (1992-04-01), Burlet et al.
patent: 5176861 (1993-01-01), Ishikawa
Thurlow Jeffery
Werner & Pfleiderer GmbH
LandOfFree
Recycling process and apparatus for the production of polymer fr does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Recycling process and apparatus for the production of polymer fr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recycling process and apparatus for the production of polymer fr will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2112967