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:
Jan. 27, 1987
Filed:
Apr. 12, 1984
Yoshiaki Sato, Mishima, JP;
Hisao Suzuki, Mishima, JP;
Toray Industries, Inc., Tokyo, JP;
Abstract
The present invention relates to an advanced silky thermoplastic polymer fiber being thick and thin along its axis and having two or more, preferably more than two axially-continuous grooves per filament with the entrance widths of 0.2 to 4.mu. and the depths of 0.1 to 1.8.mu.. The said fiber can be formed by dissolving out at least part of a easily-soluble polymer from a drawn composite fiber comprised of two differently-soluble thermoplastic polymer components, the easily-soluble one of said components having at least two locations with the areas of 0.2 to 4.mu. at the periphery of the transverse cross-section thereof and being thick and thin along its axis.