26-09-2019 дата публикации
Номер: US20190292683A1
Принадлежит:
The present disclosure discloses a method for preparing cellulose fiber. The method includes the following steps: 1) mixing cellulose pulp with NMMO aqueous solution of a mass concentration of 60%-85%, preferably 70% to 76%, to obtain a uniform mixture; 2) subjecting the obtained uniform mixture to dewatering for swelling, dissolution, and deaerating to obtain a cellulose spinning stock solution; 3) the cellulose spinning stock solution entering into a spinning machine after being filtered and heat exchange, and entering into a coagulation system after carrying out extruding by a spinneret-pack and cooling by air, and then coagulating in a NMMO coagulating bath of a mass concentration of 50% to 72% to obtain nascent fiber; and 4) subjecting the nascent fiber to rinsing to obtain a fiber filament bundle, and then, performing subsequent-section treatment to obtain cellulose fiber. 1. A method for preparing cellulose fiber , wherein the method comprises the following steps:1) mixing cellulose pulp with a NMMO aqueous solution of a mass concentration of 60%-85%, to obtain a uniform mixture;2) subjecting the obtained uniform mixture to dewatering for swelling and dissolution, and deaerating to obtain a cellulose spinning stock solution;3) the cellulose spinning stock solution entering into a spinning machine after being filtered and heat exchange, and entering into a coagulating system after carrying out extruding by spinneret-pack and cooling by air, and then coagulating in a NMMO coagulating bath of a mass concentration of 50% to 72% to obtain nascent fiber; and4) subjecting the nascent fiber to rinsing to obtain a fiber filament bundle and performing subsequent-section treatment to obtain cellulose fiber.2. The method according to claim 1 , wherein along with the proceeding of the method claim 1 , a low-concentration NMMO aqueous solution obtained after rinsing is continuously added into the coagulating system in step 3) claim 1 ,a high-concentration NMMO aqueous ...
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