Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Patent
1988-07-20
1990-12-11
Kendell, Lorraine T.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
208 22, 208 40, 4234471, 4234474, 428408, D02G 300
Patent
active
049770233
ABSTRACT:
A fiber made of pitch is disclosed. In the preferred and illustrated embodiment, the fiber has a percent elongation of about 2 percent or greater. This fiber 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.
REFERENCES:
patent: 4497789 (1985-02-01), Sawran et al.
patent: 4554148 (1985-11-01), Gomi et al.
patent: 4591424 (1986-05-01), Gomi et al.
patent: 4671864 (1987-06-01), Sawran et al.
Gessner Scott L.
Krupp Stephen P.
Kendell Lorraine T.
The Dow Chemical Company
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