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

Preparation method of flat acrylic fiber

A technology of acrylic fiber and flat shape, which is applied in the field of preparation of acrylic fiber, which can solve the problems of difficult fiber flattening and unstable quality, and achieve the effect of being beneficial to fiber flatness, improving hydrophobicity, and meeting the requirements of sheet strength

Active Publication Date: 2020-02-25
CHINA PETROLEUM & CHEM CORP
View PDF7 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention is to provide a preparation method of flat acrylic fiber, to overcome the technical problem in the prior art that the fiber is difficult to flatten and its quality is unstable

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

[0034] A kind of preparation method of flat acrylic fiber, comprises the steps successively:

[0035] Spinning coagulation forming: Extrude the polymer stock solution with a polyacrylonitrile copolymer content of 10-13.5wt% from a specially treated spinneret with rectangular holes into the coagulation bath, and form the primary fiber through double-diffusion coagulation forming. The temperature for spinning is 65-75°C, the temperature of the coagulation bath is -3-0°C, and the concentration of the coagulation bath is 14.0-15.5wt%.

[0036] Washing and drafting: After the as-spun fibers are washed to remove the spinning solvent, the drafting is completed. Among them, the washing temperature is 45-65°C, and the draft ratio is 3.0-5.0 times.

[0037] Drying and densification: after drawing, the fiber is passed through a dryer to complete the densification process, and the densification wet bulb temperature is controlled at 55-80 °C.

[0038] Heat setting: The densified fiber en...

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 flat acrylic fiber. The preparation method is characterized by sequentially including following steps: spinning, coagulating, and forming: extruding polymer dope of 10-13.5wt% in polyacrylonitrile copolymer content into coagulating bath by a rectangular-hole spinneret plate after being treated specially, and forming primary fiber through double diffusion coagulating; drying for densification after water washing and drafting, and performing heat setting; oiling, winding, and drying: subjecting fiber after being treated thermally to soak-oiling and winding sequentially to endow with processability after spinning to obtain the flat acrylic fiber. Compared with existing rectangular-hole spinneret plates, the preparation method has the advantagesthat the surface of a tantalum metal spinneret plate is improved through nitriding and siliconing, in this way, temperature difference of the polymer dope in the spinneret plate and the coagulating bath is increased from delta 45-50 DEG C before treatment to delta 55-60 DEG C, contact angle of the dope at an orifice outlet is increased by 30 degrees, rheological performance of the dope is improved, and production stability and quality improvement of the flat fiber are ensured.

Description

technical field [0001] The invention relates to a method for preparing acrylic fiber, in particular to a method for preparing flat acrylic fiber spun from a specially treated spinneret with rectangular holes. Background technique [0002] Acrylic fiber is a kind of textile fiber raw material with a large quantity and a wide range. Flat acrylic fiber is one of the functional fibers widely used in the fields of post-spinning fur, plush products and blankets. The unique performance of acrylic fiber and the flat fiber cross section make it The fabric has a unique style that cannot be replaced by other synthetic fibers in terms of luster, elasticity, anti-pilling, bulkiness, hand feeling and simulation effect. [0003] There are many production routes for flat acrylic fiber, among them, the wet process route using NaSCN as solvent is an industrial production route with high production capacity and wide application range of acrylic fiber. The acrylic fiber produced by NaSCN method...

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): D01D5/06D01D5/253D01D10/02D01D10/06D01F6/38
CPCD01D5/253D01D5/06D01D10/06D01D10/02D01F6/38
Inventor 胡满生王彪程晓峰徐静杨森王华平黄拥军
Owner CHINA PETROLEUM & CHEM CORP
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