The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 23, 1976
Filed:
Nov. 22, 1974
Kazuya Chimura, Otake, JA;
Takashi Kaneko, Tokyo, JA;
Shunichi Takashima, Otake, JA;
Ryuichi Nakazono, Otake, JA;
Masao Kawashima, Otake, JA;
Hiroyuki Ota, Otake, JA;
Kenji Tamura, Otake, JA;
Kazunori Kagawa, Otake, JA;
Kazushi Shimada, Otake, JA;
Toru Maeda, Otake, JA;
Hisao Anzai, Otake, JA;
Kenji Takoi, Otake, JA;
Kenichi Sakunaga, Otake, JA;
Mitsubishi Rayon Co., Ltd., Tokyo, JA;
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.