Formation of melt-spun acrylic fibers which are well suited...

D - Textiles – Paper – 01 – F

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

18/619

D01F 1/10 (2006.01) D01D 5/16 (2006.01) D01F 6/18 (2006.01) D01F 9/22 (2006.01)

Patent

CA 2012909

IMPROVEMENTS IN THE FORMATION OF MELT-SPUN ACRYLIC FIBERS WHICH ARE WELL SUITED FOR THERMAL CONVERSION TO HIGH STRENGTH CARBON FIBERS Abstract of the Disclosure An acrylic multifilamentary material possessing an internal structure which is well 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 C1 to C2 nitroalkane and water is melt extruded and is drawn at a relatively low draw ratio which is substantially less than the maximum draw ratio achievable. During the melt extrusion a C1 to C4 monohydroxy alkanol preferably also is present in the substantially homogenous admixture. The fibrous material which is capable of readily undergoing drawing next is passed through a heat treatment zone wherein the evolution of residual nitroalkane, 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.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Formation of melt-spun acrylic fibers which are well suited... 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 well suited..., 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 well suited... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1500456

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.