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. 08, 2007
Filed:
Oct. 24, 2003
Ik-hyeon Kwon, Seoul, KR;
Soo-myung Choi, Kyonggi-do, KR;
Young-soo Wang, Busan, KR;
Sung-ryong Kim, Daejon, KR;
Jae-shik Choi, Seoul, KR;
Tae-jung Lee, Kyonggi-do, KR;
Seok-jong Han, Kyunggi-do, KR;
Myung-woo Kim, Gyeongnam, KR;
Ik-Hyeon Kwon, Seoul, KR;
Soo-Myung Choi, Kyonggi-do, KR;
Young-Soo Wang, Busan, KR;
Sung-Ryong Kim, Daejon, KR;
Jae-Shik Choi, Seoul, KR;
Tae-Jung Lee, Kyonggi-do, KR;
Seok-Jong Han, Kyunggi-do, KR;
Myung-Woo Kim, Gyeongnam, KR;
Hyosung Corporation, Kyonggi-do, KR;
Abstract
This invention relates to a method of preparing cellulose solution which is homogeneous at relatively low temperature, in which a small amount of cellulose powder or polyvinylalcohol is dissolved in the liquid-state, concentrated N-methylmorpholine-N-oxide (hereinafter, referred to as 'NMMO') so as to lower the solidifying temperature of NMMO, and then, the resulting solution and cellulose powder are fed into an extruder so as to be mixed, swollen and melted in the extruder.