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

Preparation method of high-density regenerated fibre spinning solution

A technology for regenerating fibers and spinning dope, which is applied in the preparation of spinning solution, man-made filament in cellulose solution, and fiber processing, etc., can solve the problems of spinning liquid leakage, improving dope system, and clogging of spinneret holes, etc. Achieve the effect of removing low-boiling organic solvents

Inactive Publication Date: 2010-06-16
INST OF CHEM CHINESE ACAD OF SCI
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high-concentration spinning stock solution will inevitably bring production burdens to filtration and degassing, because the polymer concentration will increase the viscosity of the polymer solution, which has to increase the delivery pressure of the stock solution system. As the pressure increases, it will cause gel. Pass through the filter cloth and enter the spinneret, resulting in blockage of the spinneret holes and leakage of spinning liquid, which affects product quality and spinning production continuity. With the increase of filtration pressure, frequent replacement of filter cloth is also caused.

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

[0020] The composition of the regenerated cellulose fiber spinning dope is: bamboo pulp: N-methylmorpholine oxide containing water with a mass concentration of 13%: the mass ratio of acetone is 25:38:37. Filter the dissolved bamboo pulp spinning stock solution through a candle filter, then feed it into the twin-screw extruder at a speed of 20kg / h, and set the temperature in each area of ​​the screw (from the tail to the head) to 90°C , 90°C, 90°C, 90°C, 90°C, 95°C, 95°C, 95°C, 95°C, the vacuum degree is 0.01Mpa, and the screw speed is 100r / min. After the degassing is completed, take a small sample of the stock solution, and observe with the naked eye and under an optical microscope that there are only 2 small bubbles with a diameter below 0.03 mm. At this time, the mass concentration of the bamboo pulp spinning stock solution is 39.68%.

Embodiment 2

[0022] The composition of the regenerated cellulose fiber spinning stock solution is: the mass ratio of wood pulp:N-methylmorpholine oxide containing water with a mass concentration of 13%:carbon tetrachloride is 20:50:30. Filter the dissolved wood pulp spinning solution through a candle filter, then feed it into the single-screw extruder at a speed of 25kg / h, and set the temperature of each zone in the screw (from the tail to the head) to 90°C , 90°C, 90°C, 90°C, 95°C, 95°C, the vacuum degree is 0.004Mpa, and the screw speed is 200r / min. After the degassing is completed, take a small stock solution sample, and observe with the naked eye and under an optical microscope that there are only 3 small bubbles with a diameter below 0.03 mm. At this time, the mass concentration of the wood pulp spinning stock solution is 28.57%.

Embodiment 3

[0024] The composition of the regenerated cellulose fiber spinning stock solution is: the mass ratio of reed: N-methylmorpholine oxide containing 13% water in mass concentration: chloroform is 10:40:50. Filter the dissolved reed spinning stock solution through a candle filter, and then use a thin film evaporator to defoam, the temperature is 90°C, the vacuum degree is 0.006Mpa, and the rotation speed is 100r / min. After the degassing is completed, take a small stock solution sample, and observe with the naked eye and under an optical microscope that there are only 4 small bubbles with a diameter below 0.03 mm. At this time, the mass concentration of the reed spinning stock solution is 20%.

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

No PUM Login to View More

Abstract

The invention relates to a preparation method of high-density regenerated fibre spinning solution. The invention adds organic solvent with low boiling point into commonly prepared regenerated fibre spinning solution to dissolve regenerated fibre spinning solution system; the obtained spinning solution is defoamed after being filtered to obtain the regenerated fibre spinning solution with high density. The preparation method of the high-density regenerated fibre spinning solution of the invention is different from traditional spinning technology. The organic solvent with low boiling point is added into traditional regenerated fibre spinning solution, so that density same with the common spinning liquid needs to be prepared when preparing spinning solution; the adopted spinning procedure is characterized in that the spinning solution is defoamed after being filtered; the reason is as follows: spinning solution is easy to filter under low density and low viscosity, organic solvent with low boiling point can be removed in the defoaming procedure because defoaming is carried out under certain vacuum degree at high temperature; and spinning liquid with high density can be obtained by removing organic solvent with low boiling point.

Description

technical field [0001] The invention relates to a method for preparing high-concentration regenerated fiber spinning dope. Background technique [0002] Regenerated fibers are fibers obtained by dissolving or melting natural polymers or fiber raw materials that have lost their processing value, and then spinning, including regenerated cellulose fibers, regenerated protein fibers, artificial special organic compound fibers, and artificial inorganic fibers. Since there are abundant natural resources such as reed, straw, bamboo pulp, wood pulp, cotton pulp, jute, kenaf, silk fibroin, etc., it is the development direction of new fiber materials to use the leftovers of these natural resources to process and produce recycled fibers. [0003] The traditional process of solution fiber spinning is the preparation of spinning stock solution, the mixing of spinning solution, filtration, degassing, and then the spinning stock solution is continuously, quantitatively and uniformly drawn ...

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
IPC IPC(8): D01D1/02D01D1/10D01F2/02
Inventor 汪前东李兰吴杰刘必前
Owner INST OF CHEM CHINESE ACAD OF SCI
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