D - Textiles – Paper – 01 – F
Patent
D - Textiles, Paper
01
F
18/617, 18/9
D01F 6/18 (2006.01) D01D 5/08 (2006.01) D01F 9/22 (2006.01)
Patent
CA 1333954
An acrylic multifilamentary material possessing an internal structure which is particularly suited for thermal conversion to high strength carbon fibers is formed via a specifically defined combination of processing conditions. The acrylic polymer while in substantially homogeneous admixture with appropriate concentrations (as defined) of acetonitrile, C1 to C4 monohydroxy alkanol, and water is melt extruded and is drawn at a relatively low draw ratio which is substantially less than the maximum draw ratio achievable. This fibrous material which is capable of readily undergoing drawing is passed through a heat treatment zone wherein the evolution of residual acetonitrile, the monohydroxy alkanol and water takes place. The resulting fibrous material following such heat treatment is subjected to additional drawing to accomplish further orientation and internal structure modification and to produce a fibrous material of the appropriate denier for carbon fiber production. One accordingly is provided a reliable route to form a fibrous acrylic precursor for carbon fiber production without the necessity to employ the solution-spinning routes commonly utilized in the prior art for precursor formation. One can now eliminate the utilization and handling of large amounts of solvent as has heretofore been necessary when forming an acrylic carbon fiber precursor. Also, acrylic fiber precursors possessing a wide variety of cross-sectional configurations now are made possible which can be thermally converted into carbon fibers of a similar cross-sectional configuration.
607818
Daumit Gene P.
Ko Yoon S.
Slater Christopher R.
Venner Jozef G.
Young Chi C.
Basf Aktiengesellschaft
Smart & Biggar
LandOfFree
Formation of melt-spun acrylic fibers which are particularly... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Formation of melt-spun acrylic fibers which are particularly..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Formation of melt-spun acrylic fibers which are particularly... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1303084