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:
May. 20, 1997
Filed:
Mar. 08, 1996
Taiji Kameoka, Chiba-ken, JP;
Isamu Kawamura, Hyogo-ken, JP;
Isamu Ghoda, Hyogo-ken, JP;
Masanobu Ajioka, Kanagawa-ken, JP;
Keisuke Takuma, Kanagawa-ken, JP;
Akihiro Yamaguchi, Kanagawa-ken, JP;
Hiroshi Suizu, Kanagawa-ken, JP;
Mitsui Toatsu Chemicals, Inc., Tokyo, JP;
Abstract
The invention is a method of dyeing aliphatic polyester filaments with a disperse dye by selecting a dyeing temperature, dyeing pH, and dyeing time in such a way that the weight average molecular weight of the aliphatic polyester filament has a lowering ratio of 20% or less. The invention is a method for dyeing the aliphatic polyester filament with good reproducibility and level dyeing property while substantially maintaining the molecular weight and the essential excellent properties of the aliphatic polyester filament, and can provide dyed articles which have high strength, are excellent in level dyeing property and color fastness to light, and have various hues.