Hyosung Corporation

Myung-Woo Kim

Ik-Hyeon Kwon

Soo-Myung Choi

Jae-Shik Choi

Tae-Jung Lee

Young-Soo Wang

Sung-Ryong Kim

Seok-Jong Han

Ik-Hyon Gangbyeon Raemian Apt 306-502 Kwon

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.

Solution containing cellulose dissolved in N-methylmorpholine-N-oxide and high tenacity lyocell multifilament using the same

The present invention relates to a method for making highly homogenized cellulose solution, wherein the cellulose solution is obtained by obtaining a solidified N-methylmorphorine-N-oxide (hereinafter, referred to as 'NMMO') hydrates which is solidified a liquid-state NMMO hydrates comprising 10 to 18% by weight water by using a simple screw-type feeder and by controlling the temperature, feeding the solidified NMMO into a twin-screw type extruder continuously, obtaining a cellulose solution which is fully swelled in a few minutes by dispersing and mixing with cellulose powder in the twin-screw type extruder, and extruding a highly homogenized cellulose solution by feeding the obtained cellulose solution into a melting zone of the extruder to melting the cellulose solution in a few minutes by minimum heat and shear force.

Homogeneous cellulose solution and high tenacity lyocell multifilament using the same

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Gyeongnam, South Korea

Myung-Woo Kim