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:
Jul. 12, 2016
Filed:
May. 31, 2012
Akira Miyauchi, Aichi, JP;
Isao Ooki, Hiroshima, JP;
Yukihiro Mizutori, Hiroshima, JP;
Akishige Tada, Hiroshima, JP;
Akira Miyauchi, Aichi, JP;
Isao Ooki, Hiroshima, JP;
Yukihiro Mizutori, Hiroshima, JP;
Akishige Tada, Hiroshima, JP;
Mitsubishi Rayon Co., Ltd., Tokyo, JP;
Abstract
A steam-drawing apparatus has supply rollthat transfers carbon-fiber-precursor acrylic fiber bundle (T) in a transfer direction of fiber bundle (T); fiber-opening devicefor opening fiber bundle (T); width control devicefor controlling the width of fiber bundle (T); steam boxto provide steam for heating fiber bundle (T) to a temperature that allows fiber bundle (T) to be drawn; and haul-off rollthat transfers fiber bundle (T) at a speed faster than that of supply roll. Using width control deviceprovided at a position between supply rolland steam box, the width of fiber bundle (T) after passing through width control deviceis set to be 65˜110% of the width of fiber bundle (T) before entering the supply roll. The present invention proposes a method for producing a carbon-fiber-precursor acrylic fiber bundle using such a steam-drawing apparatus capable of conducting a high-speed drawing process of carbon-fiber-precursor acrylic fiber bundles at a high draw rate with stable results.