Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Patent
1974-11-22
1976-11-23
Lesmes, George F.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
428378, 428394, 428421, 428422, 428910, 428918, 428520, 264 1, 264171, 350 96R, 526328, 526245, D02G 300, B32B 2700
Patent
active
039938344
ABSTRACT:
There is provided a filament of improved light transmission having a sheath-core composite structure formed of a methyl methacrylate polymer core material and a fluorine-containing polymer sheath material. The light transmitting filament is characterized in that the methyl methacrylate polymer core material is prepared by the specific procedure of continuous bulk polymerization and subsequent removal of volatile contents, wherein the polymerization is performed in a continuously and thoroughly stirred reaction vessel at a low catalyst concentration and a relatively high temperature and with improved conversion. The light transmitting filament possesses an absorption coefficient (k) of no greater than 6 .times. 10.sup.-.sup.3 cm.sup.-.sup.1.
REFERENCES:
patent: 3647612 (1972-03-01), Schrenk
patent: 3801429 (1974-04-01), Schrenk
patent: 3900453 (1975-08-01), Shimada
patent: 3930103 (1975-12-01), Chimura
Anzai Hisao
Chimura Kazuya
Kagawa Kazunori
Kaneko Takashi
Kawashima Masao
Lesmes George F.
Mitsubishi Rayon Co. Ltd.
Robinson Ellis P.
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