PRODUCTION OF PRECERAMIC AND CERAMIC FIBERS FROM FRIABLE, THERMALLY SENSITIVE ORGANOSILICON PRECERAMIC POLYMERS
Assignee
CELANESE CORPORATION, 1211 AVENUE OF THE AMERICAS, NEW YORK, NEW YORK 10036, A CORP. OF DE.
Filed
Oct 28, 1985
Granted
Dec 6, 1988
Location
WAYNE NJ US
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.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Jun 5, 1986
Rescinded
May 22, 1987
Duration
11 months
Inventor
- 1JOHN L. WESLEY
Record Details
- Patent number
- US 4789507
- Application
- 06791877
- Aerospace match
- No
- Dataset source
- 35 USC §181 SO records