Process for preparing spinning dope of cellulose base fibre by solvent process

A process for preparing the raw dope for cellulose fibre by solvent method includes shearing the pulp, balancing at 30-50 deg.C and vacuum state for 6-12 hr, vacuum evaporation concentrating of the aqueous solution of N-methyl morpholine oxide (NMMO), mixing said pulp with the aqueous solution of NM...

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Bibliographische Detailangaben
Hauptverfasser:	HUIYU SHAO, XUECHAO HU, TANLI ZHANG
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING TEXTILES
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Beschreibung
Zusammenfassung:	A process for preparing the raw dope for cellulose fibre by solvent method includes shearing the pulp, balancing at 30-50 deg.C and vacuum state for 6-12 hr, vacuum evaporation concentrating of the aqueous solution of N-methyl morpholine oxide (NMMO), mixing said pulp with the aqueous solution of NMMO, still standing at 70-90 deg.C for 20-40 min, fast stirring for 20-60 min, vacuumizing while slowly heating to 90-125 deg.C, and maintaining the temp for 3-6 hr.