B - Operations – Transporting – 29 – D
Patent
B - Operations, Transporting
29
D
18/103
B29D 11/00 (2006.01) H01F 7/02 (2006.01)
Patent
CA 1222854
-1- Abstract: A plastic optical fiber having low attenuation of light transmission and good mechanical properties is produced by a process which comprises filtering a monomer composition comprising a purified monomer, a polymeriza- tion initiator and a chain transfer agent through a filter made of a porous material; polymerizing the filtered monomer composition substantially free from optically foreign substances in an atmosphere of inert gas in a cylinder with stirring; discontinuing the stirring when the polymerization mixture becomes viscous and completing the polymerization without stirring; heating the polymer at a temperature not lower than its softening point while removing volatile components; transferring the polymer to a spinning head connected to one end of the cylinder to form a fiber core and simultaneously forming a cladding on the periphery of the core; and drawing the optical fiber.
450103
Ueba Yoshinobu
Yamaguchi Yoichi
Kirby Eades Gale Baker
Sumitomo Electric Industries Ltd.
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