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:
Apr. 14, 2020
Filed:
Dec. 23, 2015
Kolon Industries, Inc., Gwacheon-si, Gyeonggi-do, KR;
Kt&g Corporation, Daejeon, KR;
Sang Woo Jin, Yongin-si, KR;
Woo Chul Kim, Yongin-si, KR;
Yong Kwan Cho, Yongin-si, KR;
Jong Cheol Jeong, Yongin-si, KR;
Sang Mok Lee, Yongin-si, KR;
Sang Yoel Lee, Yongin-si, KR;
Jong Yeol Kim, Daejeon, KR;
Soo Ho Kim, Daejeon, KR;
Bong Su Cheong, Daejeon, KR;
Hyun Suk Cho, Daejeon, KR;
Sung Jong Ki, Daejeon, KR;
Hyeon Tae Kim, Daejeon, KR;
KOLON INDUSTRIES, INC., Seoul, KR;
KT&G CORPORATION, Daejeon, KR;
Abstract
This invention relates to a method of manufacturing a lyocell material for a cigarette filter, including (S1) spinning a lyocell spinning dope composed of 8 to 13 wt % of a cellulose pulp and 87 to 92 wt % of an N-methylmorpholine-N-oxide (NMMO) aqueous solution; (S2) coagulating the lyocell spinning dope spun in (S1), thus obtaining a lyocell multifilament; (S3) water-washing the lyocell multifilament obtained in (S2); (S4) oiling the lyocell multifilament water-washed in (S3); and (S5) applying steam and pressure to the lyocell multifilament obtained in (S4), thus obtaining a crimped tow having 30 to 40 crimps per inch.