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:
Jun. 07, 2005
Filed:
Jun. 24, 2004
Ik-hyeon Kwon, Seoul, KR;
Soo-myung Choi, Kyonggi-do, KR;
Young-soo Wang, Busan, KR;
Sung-ryong Kim, Daejun, KR;
Jae-shik Choi, Seoul, KR;
Tae-jung Lee, Kyonggi-do, KR;
Seok-jong Han, Kyonggi-do, KR;
Ik-Hyeon Kwon, Seoul, KR;
Soo-Myung Choi, Kyonggi-do, KR;
Young-Soo Wang, Busan, KR;
Sung-Ryong Kim, Daejun, KR;
Jae-Shik Choi, Seoul, KR;
Tae-Jung Lee, Kyonggi-do, KR;
Seok-Jong Han, Kyonggi-do, KR;
Hyosung Corporation, Kyonggi-do, KR;
Abstract
The present invention relates to a high tenacity, high modulus and low shrinkage lyocell multifilament yarn suitable for use in tire cords and MRG (mechanical rubber goods). The lyocell multifilament yarn is a cellulose-based fiber for industrial applications, which is produced by dissolving pulp having a degree of polymerization (DP) of 700-2,000 and preferably 800-1,400, and a α-cellulose content of more than 90% and preferably more than 92%, in N-methylmorpholine N-oxide (NMMO) hydrate, at a pulp concentration of 5-15% by weight and preferably 8-13% by weight. The lyocell monofilament according to the present invention is characterized by the following stress-strain profile: (1) the lyocell monofilament analyzed after drying is elongated by less than 3.0% and has an initial modulus of 150-400 g/d, when it was subjected to an initial stress of 3.0 g/d; (2) it is elongated by 3.0-7.0% when it was subjected to a stress greater than the initial stress but smaller than 6.0 g/d; and (3) it is elongated from a tensile tenacity of at least 6.0 g/d until the yarn is broken.