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:
Aug. 03, 2004
Filed:
Jun. 26, 2003
Mie Yoshimura, Matsuyama, JP;
Koichi Iohara, Matsuyama, JP;
Teijin Limited, Osaka, JP;
Abstract
A polytrimethylene terephthalate (PTT) filament yarn capable of being produced by a high speed spinning method and having a high residual elongation and excellent draw-false twisting processability includes 0.5 to 4.0% by mass of filament elongation enhancing agent particles which are drawn-oriented in the filaments along the longitudinal direction thereof and have a thermal deformation temperature of 40° C. or more but less than 105° C., an average particle size D of 0.03 to 0.35 &mgr;m determined in the cross-sections of the filaments and a ratio L/D of the average particle length L in the filament longitudinal direction to the average cross-sectional particle size D of 2 to 20; and the filament yarn exhibits an increase in the residual elongation of 30% or more due to the presence of the filament elongation enhancing agent, a birefringence &Dgr;n of 0.02 to 0.07, a retaining elongation of 60 to 250% and a thermal stress peak value of 0.18 cN/dtex or less.