Unlock instant, AI-driven research and patent intelligence for your innovation.

Fully-molten low-melting-point polyester fibers and preparation method thereof

A low-melting polyester and fiber technology, applied in the field of polyester fibers, can solve the problems of difficult crystallization, high dimensional shrinkage of interwoven fabrics, and high comonomer content, and achieve improved stability, good dimensional stability, and low dimensional shrinkage. rate effect

Active Publication Date: 2020-04-14
CHINESE TEXTILE ACAD +1
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high comonomer content in the molecular structure of the full-melt low-melting point polyester fiber, the regularity of the molecular structure is poor and it is difficult to crystallize, resulting in poor dimensional stability of the fiber and high dimensional shrinkage of the interwoven fabric during the thermal bonding process. The application of full-melt low-melting polyester fiber is limited

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
  • Fully-molten low-melting-point polyester fibers and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] In this embodiment, the following method is used to prepare the finished fiber of full-melt low-melting point polyester:

[0043] (1) Configure terephthalic acid, ethylene glycol, isophthalic acid and antimony-based catalysts into a mixed slurry, wherein the molar ratio of isophthalic acid and terephthalic acid is 1:1, and the amount of antimony-based catalysts The antimony element is 450ppm of the total mass of terephthalic acid, and the molar ratio of the alcohol component ethylene glycol to the acid component terephthalic acid and isophthalic acid in the mixed slurry is 1.13:1, and then the mixed slurry It is transported to the esterification system for esterification reaction. The esterification system is composed of the first esterification reactor and the second esterification reactor. The reaction temperature of the first esterification reactor is 260°C and the reaction time is 2h. The reaction temperature of the reaction kettle is 265°C and the reaction time is ...

Embodiment 2

[0048] In this embodiment, the following method is used to prepare the finished fiber of full-melt low-melting point polyester:

[0049] (1) Terephthalic acid, ethylene glycol, isophthalic acid and antimony-based catalysts are formulated into a mixed slurry, wherein the molar ratio of isophthalic acid to terephthalic acid is 0.667:1, and the amount of antimony-based catalysts The antimony element is 430ppm of the total mass of terephthalic acid, the molar ratio of the alcohol component ethylene glycol to the acid component terephthalic acid and isophthalic acid in the mixed slurry is 2:1, and then the mixed slurry It is transported to the esterification system for esterification reaction. The esterification system is composed of an independent esterification reactor, wherein the reaction temperature of the esterification reactor is 285°C and the reaction time is 1.5h to obtain a low-melting point polyester oligomer melt body;

[0050] (2) The low-melting point polyester oligo...

Embodiment 3

[0054] In this embodiment, the following method is used to prepare the finished fiber of full-melt low-melting point polyester:

[0055] (1) Configure terephthalic acid, ethylene glycol, 2,2-dimethyl-1,3-propanediol and antimony-based catalysts into a mixed slurry, in which 2,2-dimethyl-1,3-propanediol The molar ratio to terephthalic acid is 0.4:1, the amount of antimony-based catalyst is 200ppm of the total mass of terephthalic acid in terms of antimony, and the alcohol component ethylene glycol and 2,2-dimethyl- The molar ratio of 1,3-propanediol to the acid component terephthalic acid is 1.05:1, and then the mixed slurry is sent to the esterification system for esterification reaction. The first esterification reaction tank and the second esterification reaction tank of the esterification system Reactor composition, wherein the reaction temperature of the first esterification reactor is 265°C, the reaction time is 4h, the reaction temperature of the second esterification re...

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
Winding densityaaaaaaaaaa
Winding densityaaaaaaaaaa
Winding densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses fully-molten low-melting-point polyester fibers and a preparation method thereof. The preparation method comprises the following steps of carrying out spinning and drafting onlow-melting-point polyester melts prepared from terephthalic acid, ethanediol, comonomers and a catalyst as raw materials, and carrying out multistage slack winding and multistage wet-thermal relaxation treatment on drafted yarns to obtain the finished fibers. Due to the fact that the drafted yarns are subjected to slack winding and wet-thermal relaxation, the internal stress of the fibers is eliminated, ordered supermolecular structures are generated in the fibers, the finished fibers have the high dimensional stability, and a mixed fabric made from the polyester fibers has the relatively lowdimensional shrinkage rate in a thermal bonding process.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and in particular relates to a full-melt low-melting point polyester fiber and a preparation method thereof. Background technique [0002] Low-melting point polyester fiber is a single-component or sheath-core composite fiber made of low-melting point polyester. Among them, the melting point of the core layer of the skin-core composite fiber is higher than that of the skin layer. After the skin layer is melted, the core layer part still maintains the fiber shape, so that it forms a point-like bond to ensure the performance of the bonded product. Low-melting point polyester fiber can start to melt and bond at a lower temperature. It can not only replace unenvironmentally friendly chemical adhesives, is green and environmentally friendly, but also has excellent ability to maintain a certain shape after being combined with other materials. Due to the low-melting point fiber has the charact...

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): D01D5/098D01D10/02D01F6/84C08G63/183C08G63/672C08G63/78B65H54/70
CPCD01D5/098D01D10/02D01F6/84C08G63/183C08G63/78C08G63/672B65H54/70B65H2701/313
Inventor 邱志成李鑫刘玉来廉志军李志勇金剑武术芳钟淑芳张凯悦任爽
Owner CHINESE TEXTILE ACAD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com