Plastic and nonmetallic article shaping or treating: processes – Carbonizing to form article – Filaments
Patent
1985-10-28
1988-12-06
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Carbonizing to form article
Filaments
264 401, 264 404, 264 407, 264 56, 2641761, 26421115, 26421122, 26421123, 264349, D01F 696, D01F 910, B29C 4710, B29C 4792
Patent
active
047895071
ABSTRACT:
Improved melt spinning of friable, thermally sensitive organosilicon preceramic polymers is obtained by using externally-metered feed means for continuous feeding of the polymer to an extruder. Starve feeding by metering the feed at a rate less than that required to fill the feed screw flights prevents pulverizing and compaction of the friable polymer, leading to cross-linking of trapped polymer and solid plugging, which would cause the extruder to bind and cease to function. Metered feed can be obtained by either monitoring of screw loading or discharge pressure and adjustment of hopper feed rate or control based upon measured values of extruder speed or metering pump speed.
REFERENCES:
patent: Re31447 (1983-11-01), Baney et al.
patent: 3225963 (1965-12-01), Arpajian
patent: 3915344 (1975-10-01), Hargreaves et al.
patent: 3982509 (1976-09-01), Colling et al.
patent: 3984509 (1976-10-01), Hall et al.
patent: 4138463 (1979-02-01), Moneghan
patent: 4310651 (1982-11-01), Baney et al.
patent: 4312970 (1982-01-01), Gaul, Jr.
patent: 4340619 (1982-07-01), Gaul, Jr.
patent: 4342712 (1982-08-01), Yajima et al.
patent: 4431598 (1984-02-01), Korpman
patent: 4482669 (1984-11-01), Seyferth et al.
patent: 4482689 (1984-11-01), Haluska
patent: 4591467 (1986-05-01), Kopernicky
Ceramic Bulletin, vol. 62, No. 8, 1983, pp. 893-898, Yajima; "Special Heat-Resisting Materials from Organometallic Polymers".
Plastics Engineering, Jun. 1978, pp. 45-49, McKelvey & Steingiser; "Improved Processing with Metered-Starved Feeding of Extruders".
George, Jr. Henry H.
Wesley John L.
Hoechst Celanese Corporation
Lorin Hubert C.
Silbaugh Jan H.
LandOfFree
Production of preceramic and ceramic fibers from friable, therma does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Production of preceramic and ceramic fibers from friable, therma, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Production of preceramic and ceramic fibers from friable, therma will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1492982