Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion
Reexamination Certificate
2007-05-08
2007-05-08
Woodward, Ana (Department: 1711)
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Shaping by extrusion
C057S244000, C057S362000, C264S177170, C264S17800F, C264S207000, C264S211120, C264S211140, C264S211150
Reexamination Certificate
active
11266253
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.
REFERENCES:
patent: 4246221 (1981-01-01), McCorsley
patent: 4255300 (1981-03-01), Franks et al.
patent: 4880469 (1989-11-01), Chanzy et al.
patent: 5626810 (1997-05-01), Zikeli et al.
patent: 5725821 (1998-03-01), Gannon et al.
patent: 5747125 (1998-05-01), Markulin
patent: 5826798 (1998-10-01), Schindler et al.
patent: 5951933 (1999-09-01), Stall et al.
patent: 6153003 (2000-11-01), Lee et al.
patent: 6241927 (2001-06-01), Mulleder et al.
patent: 6677447 (2004-01-01), Lee et al.
patent: 6812270 (2004-11-01), Lee et al.
patent: 6902804 (2005-06-01), Kwon et al.
patent: 2003/0225206 (2003-12-01), Lee et al.
patent: 2005/0019564 (2005-01-01), Kwon et al.
patent: 2005/0066646 (2005-03-01), Kwon et al.
patent: 2005/0154093 (2005-07-01), Kwon et al.
patent: 2005/0160939 (2005-07-01), Kwon et al.
patent: 2 374 326 (2002-10-01), None
patent: 2 389 111 (2003-12-01), None
patent: 2000-041342 (2000-07-01), None
patent: 2001-038732 (2001-05-01), None
patent: 94/06530 (1994-03-01), None
Yun-Jeong Seong et al, “The Effects of PVA on the Properties of Cellulose/PVA Solution Blends in NMMO Hydrate”; Polymeric Materials: Science & Engineering; 2002; 86, pp. 167-168.
Choi Jae-Shik
Choi Soo-Myung
Han Seok-Jong
Kim Myung-Woo
Kim Sung-Ryong
Hyosung Corporation
Nixon & Vanderhye P.C.
Woodward Ana
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