US 5286435
PROCESS FOR FORMING HIGH STRENGTH, HIGH MODULUS POLYMER FIBERS
Assignee
ALLIEDSIGNAL INC.
Filed
Dec 31, 1987
Granted
Feb 15, 1994
Location
AKRON OH US
Abstract
Fibers of linear polyethylene or polypropylene are solution spun, cooled, dried in hot air and hot drawn. Drying and hot drawing are carried out by passing a moving filament of the wet polymer through a hot air dryer having an air temperature of at least 55 degrees C., preferably at least 60 degrees C., then heating and hot drawing a moving filament of the dried fiber. Optional steps include wet drawing the fiber prior to drying, and solvent exchange of the original solvent, e.g. decalin, for a more volatile solvent.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Dec 22, 1987
Rescinded
Feb 28, 1992
Duration
4 years, 2 months
Inventor
- 1LEONID I. SLUTSKER
Record Details
- Patent number
- US 5286435
- Application
- 07143246
- Aerospace match
- No
- Dataset source
- 35 USC §181 SO records
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ALLIEDSIGNAL INC.Back to patent indexSource: USPTO 35 USC §181 secrecy order records