Plastic and nonmetallic article shaping or treating: processes – Carbonizing to form article – Filaments
Patent
1986-09-16
1991-11-12
Lorin, Hubert C.
Plastic and nonmetallic article shaping or treating: processes
Carbonizing to form article
Filaments
264 296, 264 83, 2642103, 2642107, 2642108, 26421111, 26421115, 4234477, D01F 9155
Patent
active
050645811
ABSTRACT:
A fiber made of pitch having a percent elongation of about 2 percent or greater is made by melt spinning an optically isotropic pitch to form a fiber typically in the range of about 5 to about 50 microns diameter, treating the fiber with an oxidizing atmosphere, subsequently removing a certain portion of the oxidant thereby reducing the weight of the fiber, with the optional post-treatment step of repetitively stretching in the elastic range short of breakage to increase the percent elongation.
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Gessner Scott L.
Krupp Stephen P.
Lorin Hubert C.
The Dow Chemical Company
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