Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Cellulose in-situ urea modified plastification melt spinning method

A melt spinning and cellulose technology, which is applied in the directions of melt spinning, man-made filaments made of cellulose derivatives, spinning solution preparation, etc. Problems such as low viscosity of ester solution, to achieve the effect of promoting energy consumption, easy processing and forming, and low energy consumption

Inactive Publication Date: 2013-03-13
DONGHUA UNIV
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the industrial production of cellulose carbamate fiber in my country has progressed very slowly. The main reason is that most of the cellulose carbamate fiber is prepared by wet spinning in my country, and the viscosity of cellulose carbamate solution is low. , spinnability is not as good as viscose solution

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The cellulose and urea were vacuum-dried at 50° C. for 12 hours, and 100 g of cellulose, 300 g of urea, and 800 g of [BMIM]Cl were added into a high-speed mixer and mixed evenly.

[0024] The temperature of the first zone of the twin-screw extruder is 100°C, the temperature of the second zone is 110°C, the temperature of the third zone is 120°C, the temperature of the fourth zone is 120°C, the temperature of the fifth zone is 130°C, the temperature of the sixth zone is 140°C, and the temperature of the seventh zone 150°C, 160°C in the eighth zone, and 160°C in the head. The screw speed is 250 rpm, the extrusion pressure is 3 MPa, and the vacuum pump pressure is 0.8 MPa.

[0025] The spinnability of the cellulose melt is good, the final titer is 2.64dtex, the breaking strength is 4.31cN / dtex, and the elongation is 26.7%.

Embodiment 2

[0027] The cellulose and urea were vacuum-dried at 70° C. for 24 hours, and 100 g of cellulose, 400 g of urea, and 1000 g of [BMIM]Cl were added into a high-speed mixer and mixed evenly.

[0028] The temperature of the first zone of the twin-screw extruder is 100°C, the temperature of the second zone is 110°C, the temperature of the third zone is 120°C, the temperature of the fourth zone is 130°C, the temperature of the fifth zone is 140°C, the temperature of the sixth zone is 150°C, and the temperature of the seventh zone 160°C, 170°C in the eighth zone, and 165°C at the head. The screw speed is 300 rpm, the extrusion pressure is 4 MPa, and the vacuum pump pressure is 0.9 MPa.

[0029] The spinnability of the cellulose melt is good, the final titer is 2.35dtex, the breaking strength is 4.42cN / dtex, and the elongation is 28.1%.

Embodiment 3

[0031] The cellulose and urea were vacuum-dried at 90° C. for 36 hours, and 100 g of cellulose, 500 g of urea, and 1200 g of [BMIM]Cl were added to a high-speed mixer and mixed evenly.

[0032] The temperature of the first zone of the twin-screw extruder is 100°C, the temperature of the second zone is 110°C, the temperature of the third zone is 120°C, the temperature of the fourth zone is 135°C, the temperature of the fifth zone is 145°C, the temperature of the sixth zone is 155°C, and the temperature of the seventh zone The temperature is 165°C, the temperature in the eighth zone is 175°C, and the temperature of the head is 160°C. The screw speed is 350rpm, the extrusion pressure is 5MPa, and the vacuum pump pressure is 1MPa.

[0033] The spinnability of the cellulose melt is good, the final titer is 2.58dtex, the breaking strength is 4.32cN / dtex, and the elongation is 27.6%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
degree of polymerizationaaaaaaaaaa
aggregationaaaaaaaaaa
elongationaaaaaaaaaa
Login to View More

Abstract

The invention relates to a cellulose in-situ urea modified plastification melt spinning method comprising the following steps of: (1) drying the cellulose and the urea under a vacuum condition; (2) uniformly mixing 10-20wt% of cellulose, 50-70wt% of ionic liquid and 10-40wt% of urea; (3) extruding the mixture by a co-rotating twin screw extruder, defoaming, filtering and ejecting from a spinneret port; (4) drawing and coiling the quickly solidified fiber to form cellulose fiber. The method can be used for get the cellulose grafted copolymer which is easy to process, high-efficiency, green and clean, and can prompt development of the novel cellulose fiber which is low in energy consumption, economical, practical and environmentally-friendly.

Description

technical field [0001] The invention belongs to the field of derivatization and modification of cellulose and its high-temperature melt spinning, and particularly relates to a cellulose in-situ urea modified plasticized melt spinning method. Background technique [0002] Cellulose is widely derived from nature, such as hemp, wheat straw, rice straw, etc. Because there are two secondary hydroxyl groups and one primary hydroxyl group on each glucose unit ring of cellulose, it is easy to form intramolecular and intermolecular hydrogen bonds, and the crystallinity is very high, so cellulose is difficult to dissolve in general inorganic and organic solvents , need to use special solvents or derivatize and modify them to facilitate processing and utilization. Cellulose derivatization mainly includes esterification, etherification and graft copolymerization. Among them, cellulose and urea react to form cellulose carbamate, the process is relatively simple, the spinnability is goo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): D01F2/24C08B15/06D01D5/08D01D1/02D01D1/09
Inventor 余木火张玥李欣达李海峰黎欢
Owner DONGHUA UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com