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

Spinning Control Method of High Temperature Resistant Polyurethane Elastic Fiber

A polyurethane elasticity and spinning control technology, which is applied in fiber processing, stretch spinning, rayon manufacturing, etc., to achieve the effects of increased orientation and crystallinity, good structural consistency, and improved breaking strength

Active Publication Date: 2022-05-17
宁夏宁东泰和新材有限公司
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention proposes a high temperature resistant polyurethane elastic fiber spinning control method in order to solve the problems in the prior art when the high temperature resistant polyurethane elastic fiber stock solution is spun in a high temperature spinning tunnel

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Spinning Control Method of High Temperature Resistant Polyurethane Elastic Fiber
  • Spinning Control Method of High Temperature Resistant Polyurethane Elastic Fiber

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0037] The preparation method of the high-temperature-resistant polyurethane elastic fiber spinning stock solution in the embodiment of the present invention is according to the patent "a kind of spandex with good heat resistance and stability and its preparation method" (publication number: CN 111101230 A) that the applicant has applied for and disclosed Prepared by the method in, the specific steps are as follows:

[0038](1) Prepolymerization reaction: Mix polytetramethylene ether glycol (molecular weight: 1800) and 4,4'-diphenylmethane diisocyanate, react at 68°C for 120min, and then use N,N-dimethylethylene The amide is used as a solvent to fully dissolve the prepolymer, and the prepolymer solution is obtained after cooling;

[0039] (2) Polymerization reaction: transfer the prepolymer solution to the polymerization reactor, stir evenly, and install a cooling pipe on the outer plate of the polymerization reactor to control the temperature in the polymerization reactor, an...

Embodiment 1

[0048] High temperature resistant polyurethane elastic fiber spinning control method, the specific tunnel system control parameters are as follows:

[0049] The pressure of the delivery pipeline that transports the spinning dope to the spinning assembly is set to 8.0Mpa, the temperature of the delivery pipeline is set to 50°C, the hole of the spinning assembly is a circular cross-section, the cross-sectional diameter is 0.3mm, and the effective length is 1.2mm;

[0050] Set the temperature of the upper part of the corridor from the top of the corridor to 3.6m from the top of the corridor to 166°C, set the pressure of the air inlet at the upper part of the corridor to 850pa, set the pressure of the air outlet at the upper part of the corridor to 225Pa, and set the wind speed of the air inlet at the upper part of the corridor to 0.3m / s;

[0051] Set the temperature in the middle of the corridor from the position 3.6m from the top of the corridor to the position 6m from the top of...

Embodiment 2

[0058] High temperature resistant polyurethane elastic fiber spinning control method, the specific tunnel system control parameters are as follows:

[0059] The pressure of the delivery pipeline that transports the spinning dope to the spinning assembly is set to 8.0Mpa, the temperature of the delivery pipeline is set to 50°C, the hole of the spinning assembly is a circular cross-section, the cross-sectional diameter is 0.3mm, and the effective length is 1.2mm;

[0060] Set the temperature of the upper part of the tunnel from the top of the tunnel to 4m from the top of the tunnel to 171°C, set the pressure of the air inlet of the tunnel to 780pa, set the pressure of the air outlet of the tunnel to 195Pa, and set the wind speed of the air inlet to 0.2m / s;

[0061] Set the temperature in the middle of the corridor from 4m from the top of the corridor to 6.4m from the top of the corridor to 260°C, set the pressure of the air inlet of the corridor to 880pa, set the pressure of the ...

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
diameteraaaaaaaaaa
lengthaaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for controlling the spinning of high-temperature-resistant polyurethane elastic fibers. In the invention, the temperature at the upper part of the tunnel is set to be slightly higher than the boiling point temperature of the spinning stock solution solvent, and at the same time, the lower wind speed and wind pressure are set to make the interior of the silk sliver and the silk sliver The difference in the volatilization speed of the solvent on the surface is small. The temperature in the middle of the spinning tunnel is set to 250-270°C. At the same time, the corresponding wind speed and wind pressure are set to further volatilize the solvent diffused from the inside of the filament to the surface of the filament. The temperature in the lower part of the tunnel is set to a ratio The temperature in the middle of the tunnel is lower by 20°C to 30°C to minimize the solvent concentration in the filaments, and finally set the drafting speed of the drafting rollers. Polyurethane elastic fiber filaments can obtain high-temperature-resistant polyurethane elastic fibers with good orientation, high crystallinity, and uniform structural consistency through the above spinning control conditions.

Description

technical field [0001] The invention relates to a method for controlling the spinning of polyurethane elastic fibers, in particular to a method for controlling the spinning of high-temperature resistant polyurethane elastic fibers. Background technique [0002] Polyurethane elastic fiber is a multi-block copolymer with alternating soft and hard segments. The soft segment in polyurethane elastic fiber is composed of polyester polyol or polyether polyol, and the hard segment is composed of isocyanate and small molecule chain extender. generate. Due to the alternating structure of soft and hard segments, the spandex fiber has the advantages of high breaking strength, high breaking elongation and good elastic recovery rate. [0003] In the preparation process of high temperature resistant polyurethane elastic fiber, the preparation process of polyurethane spinning dope affects the high temperature resistance, elastic properties and breaking strength of polyurethane elastic fibe...

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 Patents(China)
IPC IPC(8): D01F6/94D01F1/10D01F11/08C08G18/75C08G18/66C08G18/48D01D1/00D01D5/16D01D4/00
CPCD01F6/94D01F1/10D01F11/08C08G18/755C08G18/6685C08G18/4854D01D1/00D01D5/16D01D4/00
Inventor 王超马永辉罗正龙牟元生李喜乐王恩庆
Owner 宁夏宁东泰和新材有限公司
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