US 12,247,323 B2
Continuous preparation method of cellulose fibers
Ting Li, Beijing (CN); Chenxi Zhang, Beijing (CN); Chunzu Cheng, Beijing (CN); Mingming Zhang, Beijing (CN); Jigang Xu, Beijing (CN); and Kedong Chi, Beijing (CN)
Assigned to CHINA TEXTILE ACADEMY, Beijing (CN)
Appl. No. 17/790,115
Filed by CHINA TEXTILE ACADEMY, Beijing (CN)
PCT Filed Nov. 19, 2020, PCT No. PCT/CN2020/129941
§ 371(c)(1), (2) Date Jun. 29, 2022,
PCT Pub. No. WO2021/135705, PCT Pub. Date Jul. 8, 2021.
Claims priority of application No. 201911418063.8 (CN), filed on Dec. 31, 2019.
Prior Publication US 2023/0042125 A1, Feb. 9, 2023
Int. Cl. D01D 1/02 (2006.01); D01D 5/06 (2006.01); D01D 5/12 (2006.01); D01D 5/26 (2006.01); D01D 7/00 (2006.01); D01D 10/06 (2006.01); D01F 2/00 (2006.01); D01F 2/24 (2006.01)
CPC D01F 2/00 (2013.01) [D01D 5/06 (2013.01); D01D 5/12 (2013.01); D01D 5/26 (2013.01); D01D 10/06 (2013.01); D10B 2201/22 (2013.01); D10B 2201/28 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A continuous preparation method of cellulose fibers, wherein in the preparation method, a forming tension of 0.1 to 1.9 cN/dtex is applied to a fine solution stream obtained by extrusion through a spinneret plate and air gap cooling, then the fine solution stream is fed into a coagulating bath at a speed of 80 to 1000 m/min, a traction tension of 0.075 to 1.5 cN/dtex is continued to be applied to washed fibers in a water washing system after the coagulating bath, and finally, the washed fibers are fed into a post-treatment system for continuous spinning to obtain finished fibers, wherein a spraying direction of the coagulating bath is consistent with a running direction of the fine solution stream, the coagulating bath further comprises a coagulating bath water tank disposed at an outlet of tows, the coagulating bath water tank comprises a filament guide system, and the outlet of tows is disposed vertically extending downwards into the water tank, or is disposed along a liquid level of the water tank, or is disposed bending upwards along a liquid level of the water tank, or is disposed bending upwards from a position lower than a liquid level of the water tank, or is disposed higher than a liquid level of the water tank, so that the fiber tows passing through the coagulating bath are completely immersed, or partially immersed, or do not pass through the coagulating bath water tank; a soaking length of the fiber tows through the coagulating bath is 50 to 1500 mm; the coagulating bath water tank is provided with a filament guide system, a filament guide part of the filament guide system comprises one or more of driving double rollers, a single-roller combined filament separating roller, a rod and a hook; the driving double rollers or single roller is provided with a motor, and the rotating speed of the roller is the spinning speed; respective axis extension lines of the driving double rollers are intersected, and a number of winding turns of the tows on the driving rollers is not smaller than three; the filament guide system is installed below an outlet of the coagulating bath.