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. 02, 1999
Filed:
May. 20, 1998
Mie Yoshimura, Ibaraki, JP;
Toshimasa Kuroda, Ibaraki, JP;
Teijin Limited, Osaka, JP;
Abstract
A spinning dope for the stable production of a cellulose diacetate fiber at a high productivity rate, such fiber being almost free from the occurrence of fluffs and excellent in strength and elongation properties. The spinning dope is a composition formed of (1) acetone or a solvent containing acetone and 0 to 5% by weight, based on the acetone, of water or methanol, (2) 24 to 33% by weight, based on the total weight of the composition, of cellulose diacetate, and (3) at least a phthalate ester, an aliphatic dibasic acid ester, a fatty acid ester, a phosphate ester, an epoxy plasticizer or a glycol-ester-containing plasticizer; and the composition has a thixotropy index (I), represented by the following equation, of at least 1.3,