Manufacture of water super-absorbing fiber and fiber thereby

A technology for superabsorbent fibers and manufacturing methods, which are applied in fiber processing, textile and papermaking, conjugated synthetic polymer rayon, etc. The degree of connection is difficult to control and other problems, to achieve the effects of excellent spinnability, good physical and mechanical properties, and excellent physical and mechanical properties of fibers

Inactive Publication Date: 2007-08-08
CHINESE TEXTILE ACAD
View PDF34 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned documents disclose the use of partially neutralized polyacrylic acid or copolymers of acrylic acid and other monomers mixed with polyvinyl alcohol to produce superabsorbent fibers, in fact, the addition of polyvinyl alcohol components will increase the spinning rate. The viscoelasticity of the dope, which affects the rheology and spinnability of the dope
In addition, during the thermal crosslinking process after fiber formation, a large number of hydroxyl groups on the macromolecular chain of polyvinyl alcohol are prone to excessive crosslinking with carboxyl groups, making it difficult to control the degree of crosslinking
[0008] EP0268498A 2 、EP0269393A 2 It is disclosed that acrylic acid, sodium acrylate, methyl acrylate, and hydroxypropyl methacrylate are copolymerized to obtain a copolymer aqueous solution, or acrylic acid, sodium acrylate, (2-ethyl) hexyl acrylate are copolymerized and epoxy polypropylene oli

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

[0022] The degree of neutralization (the weight sum of sodium acrylate weight / acrylic acid and sodium acrylate)=60% acrylic acid, sodium acrylate, acrylamide, hydroxypropyl methacrylate comonomer and polymerization initiator ammonium persulfate are mixed with water, Stirring and dissolving under normal temperature in the polymerization reactor obtains the unpolymerized aqueous solution, the total concentration of the comonomer in the aqueous solution is 35% (weight), the acrylic acid of neutralization degree 60%: acrylamide: hydroxypropyl methacrylate=68:30 : 2 (weight ratio). Under stirring, the temperature of the mixed aqueous solution in the polymerization tank was raised to 75° C. to initiate polymerization, and the polymerization reaction time was 90 minutes. After the polymerization was completed, the stirring was stopped, and vacuum degassed for 36 hours to obtain a bubble-free copolymer spinning stock solution.

[0023] Mix polyvinyl alcohol with a degree of polymeriz...

Embodiment 2

[0026] Mix acrylic acid, acrylamide, hydroxypropyl methacrylate comonomer with a neutralization degree of 60% and a polymerization initiator with water, stir and dissolve in a solution preparation kettle at room temperature to obtain an unpolymerized aqueous solution, and the comonomer in the aqueous solution Acrylic acid with a total concentration of 35% and a neutralization degree of 60%: acrylamide: hydroxypropyl methacrylate = 68:30:2. Feed the mixed aqueous solution in the solution preparation tank into the acid-resistant reactive twin-screw extruder with an aspect ratio of 40 at an air pressure of 0.4Mpa. The twin-screw extruder heats up to initiate polymerization, and is pushed by the extruder through the static mixer and the delivery pipeline, and then through the booster pump, pre-filter and metering pump to the cortex inlet of the spinneret assembly.

[0027] Mix polyvinyl alcohol with a degree of polymerization of 2400 and a degree of alcoholysis of 99% with water, ...

Embodiment 3

[0030] Others are the same as Example 2, except that the acrylic acid with a degree of neutralization of 40%: hydroxypropyl methacrylate=98: 2, no acrylamide monomer is added, the total concentration of comonomers in the aqueous solution is 20%, and the degree of polymerization is The concentration of polyvinyl alcohol of 1700 is 50%. Feed the mixed aqueous solution in the solution preparation tank into the acid-resistant reactive twin-screw extruder with an aspect ratio of 30 at an air pressure of 0.8Mpa. The head pressure is 4Mpa. After the tow is exported, it is drawn 3 times at 100°C , winding at a speed of 300 m / min, the core layer polyvinyl alcohol content of the obtained superabsorbent fiber is 55%, the single filament fineness is 4.8d, the breaking strength is 3.0g / d, the pure water absorption rate is 1111113g / g, and the physiological saline is absorbed 21g / g.

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
Breaking strengthaaaaaaaaaa
Finenessaaaaaaaaaa
Breaking strengthaaaaaaaaaa
Login to view more

Abstract

An ultra-hydroscopic fibre is prepared from acrylic acid, sodium acrylate, acrylamide and hydroxypropyl methacrylate through copolymerizing in aqueous solution under triggering of polymerization trigger, providing polyvinyl alcohol as skin or core, composite extruding-out by compound extrusion noozle, hot-air dry spinning, and hot cross-linking. Its davantages are high hydroscopicity, better physical and mechanical properties and low cost.

Description

technical field [0001] The invention relates to a method for manufacturing functional synthetic polymer fiber material-superabsorbent fiber and the fiber; in particular, the leather is prepared from acrylic superabsorbent copolymer and polyvinyl alcohol fiber-forming high polymer through a twin-screw extruder continuous stock solution. -Manufacturing method and fiber of superabsorbent fiber by core composite spinning process. Background technique [0002] At present, there are three main technical routes for the production of synthetic polymer superabsorbent fibers in the world: one is the technical route of using polyacrylonitrile fibers for subsequent chemical treatment; the other is isobutylene-maleic anhydride with crosslinking agent The aqueous solution of the copolymer is the spinning stock solution, which is dry-spun and thermally cross-linked. The manufacturing technology route of the joint process. [0003] Japanese Patent Laid-Open No. 497526, No. 55-132754, No. ...

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): D01D5/34D01F8/04
Inventor 孙玉山骆强朱庆松张彩霞陆伊伦王玥徐继刚李启明林华体
Owner CHINESE TEXTILE ACAD
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