Method for producing Lyocell fibre for tire cord

A tire cord and fiber technology, which is applied in the field of cellulose fiber preparation, can solve problems such as low production efficiency, unsatisfactory mechanical properties, and difficulty in dissolving cellulose pulp, so as to improve production efficiency, non-toxic recovery rate, size good stability effect

Active Publication Date: 2008-06-11
浙江龙赛尔纤维科技有限公司
View PDF17 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to ensure that the fiber has better mechanical properties, this method uses a part of cellulose pulp with high relative molecular weight as raw material, but the addition of cellulose pulp with high relative molecular weight brings difficulties to the dissolution of cellulose pulp , therefore, a special process is required to completely dissolve, and the highest concentration of cellulose in the spinning 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

[0029] The cellulose pulp with a degree of polymerization of 705 and a cellulose content of 92% is cut into small pieces of 2 to 6 cm × 2 to 6 cm with a pulp chopper, and these small pieces are placed in a vacuum degree of -9 × 10 4 Pa and 50 ° C under drying and equilibrium for 10 hours to make the water content 2%; 65.4 kg of NMMO aqueous solution with a water content of 50% was distilled under reduced pressure to obtain 44.2 kg of an NMMO aqueous solution with a water content of 26%.

[0030] 5.1 kg of dried cellulose pulp and the above-mentioned evaporated concentrated NMMO aqueous solution were placed in a dissolution tank, and 510 g of magnesium chloride was added to form a cellulose / NMMO / magnesium chloride mixture. After 30 minutes of static immersion at 85°C, stir at a stirring speed of 60 rpm for 40 minutes to make it into a slurry-like porridge, then raise the temperature of the slurry-like porridge to 100°C, stir, reduce Pressure distillation until the water content...

Embodiment 2

[0035] The cellulose pulp with a degree of polymerization of 900 and an α-cellulose content of 99% is cut into small pieces of 2 to 6 cm × 2 to 6 cm with a pulp chopper, and these small pieces are placed in a vacuum degree of -9 × 10 4 Pa and 50 ° C under drying and equilibrium for 10 hours to make the water content 2%; 65.4 kg of NMMO aqueous solution with a water content of 50% was distilled under reduced pressure to obtain 44.2 kg of an NMMO aqueous solution with a water content of 26%.

[0036] 4.6 kg of dried cellulose pulp and the above-mentioned evaporated concentrated NMMO aqueous solution were placed in a dissolution tank, and 230 g of ammonium chloride was added to form a cellulose / NMMO / ammonium chloride mixture. After 30 minutes of static immersion at 85°C, stir at a stirring speed of 60 rpm for 30 minutes to make it into a porridge shape, then raise the temperature of the porridge mixture to 100°C, stir, reduce Pressure distillation until the water content of the N...

Embodiment 3

[0041] The cellulose pulp with a degree of polymerization of 900 and an α-cellulose content of 99% is cut into small pieces of 2 to 6 cm × 2 to 6 cm with a pulp chopper, and these small pieces are placed in a vacuum degree of -9 × 10 4 Pa and 50 ° C under drying and equilibrium for 10 hours to make the water content 2%; 65.4 kg of NMMO aqueous solution with a water content of 50% was distilled under reduced pressure to obtain 44.2 kg of an NMMO aqueous solution with a water content of 26%.

[0042] 4.6kg of dried cellulose pulp and the above-mentioned evaporated concentrated NMMO aqueous solution were placed in a dissolution tank, and 368g of calcium nitrate was added to form a cellulose / NMMO / calcium nitrate mixture. After 30 minutes of static immersion at 85°C, stir at a stirring speed of 60 rpm for 30 minutes to make it into a porridge shape, then raise the temperature of the porridge mixture to 100°C, stir, reduce Pressure distillation until the water content of the NMMO aq...

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
Strongaaaaaaaaaa
Initial modulusaaaaaaaaaa
Strongaaaaaaaaaa
Login to view more

Abstract

The invention relates to a preparation method of the Lyocell fiber for the tyre fabric cord in chemical fiber production. The cellulose alpha pulp and the NMMO water solution are added into a dissolver according to a certain proportion, and a certain amount of inorganic salt is added to form cellulose pulp / NMMO / inorganic salt mixture, the mixture is statically soaked and stirred into pulp shape, spinning raw solution is formed through warm-up stirring and reduced pressure distillation, and the as-formed fiber is frozen through dry-wet spinning, after lixiviation, moderate stretching, heat setting, and oiling, the fiber is winded into rollers. The utility model has the advantages that the cellulose alpha pulp with moderate polymerization degree is adopted as the raw material, and the concentration of the cellulose of the invention is as high as 19.8 percent; the production efficiency is high; simultaneously, the inorganic salt for increasing the apparent molecular weight of the cellulose added into the system is adopted, and moderate stretching and heat setting is performed to the as-formed fiber, the manufactured Lyocell fiber has good mechanical properties such as high intensity, high modulus, good dimensional stability, and good heat durability, and the fiber can be as applied to the fiber of high quality tyre fabric cord used in high grade passenger vehicle field.

Description

technical field [0001] The present invention relates to the preparation method of industrial cellulose fiber in the chemical fiber industry, particularly refers to adopting N-methylmorpholine-N-oxide (NMMO) aqueous solution as the solvent spinning high-strength and high-modulus lyocell ( Lyocell) fiber technology. Background technique [0002] Lyocell fiber is a new type of regenerated cellulose fiber. It directly dissolves cellulose pulp in non-toxic N-methylmorpholine-N-oxide (NMMO) aqueous solution to form a cellulose solution, and then passes dry- produced by wet spinning. Compared with the traditional regenerated cellulose fiber, viscose fiber, Lyocell fiber has higher strength and modulus, lower elongation, good dimensional stability, good heat resistance, and the production process is environmentally friendly. Lyocell technology has been extensively studied at home and abroad, and many patents have been formed, such as US4196282, US 4246221, WO 1997 / 47790, US 509469...

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): D01F2/02D01D1/02D01D10/02D01D10/06D02G3/48
Inventor 杨革生邵惠丽魏孟媛胡学超田耀鑫
Owner 浙江龙赛尔纤维科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap