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:
Mar. 24, 2009
Filed:
Dec. 15, 2006
Yukio Shirokura, Shizuoka, JP;
Kousuke Yamaki, Shizuoka, JP;
Yukio Shirokura, Shizuoka, JP;
Kousuke Yamaki, Shizuoka, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
A cylindrical outer clad section is formed by melt-extrusion molding of polyvinylidene fluoride (PVDF) having a molecular structure in which the number of defect bonds of successive CFunits and successive CHunits constitutes not less than 4% with respect to a total number of bonds of CFunits and CHunits. Next, an inner clad section forming material is poured into a hollow portion of the outer clad section and polymerized to form a cylindrical inner clad section. A core section forming material is filled in a hollow portion of the inner clad section and polymerized to form a core section. Thus, a preform is fabricated. The preform is heat-drawn to obtain a POF. The POF has an outer clad in which small spherocrystals are formed. Average roughness Ra of an inner wall of the outer clad is less than 0.10 μm.