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

Preparation method of ultrafine composite fiber with high wet transmitting performance

A technology of ultra-fine composite fiber and high moisture conductivity, which is applied in fiber processing, fiber chemical characteristics, rayon manufacturing, etc. It can solve the problems of fiber no practical value, mechanical property decline, spinnability decline, etc., and achieve improved spinning Processability, improved compatibility, excellent softness

Active Publication Date: 2012-10-17
SHAOXING GLOBAL CHEM FIBER +1
View PDF5 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the dispersibility of additives in the matrix polypropylene is very important. If the dispersed particle size is too large, it is easy to cause broken ends, the spinnability is greatly reduced or even cannot be spun; the second is that the mechanical properties are greatly reduced, and the fibers have no practical value.

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
  • Preparation method of ultrafine composite fiber with high wet transmitting performance
  • Preparation method of ultrafine composite fiber with high wet transmitting performance
  • Preparation method of ultrafine composite fiber with high wet transmitting performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for preparing an ultrafine composite fiber with high moisture permeability in this embodiment includes the following steps: 1) Firstly, through a method of combining melt polycondensation and solid-state polycondensation, using terephthalic acid and ethylene glycol as raw materials, The molar ratio of terephthalic acid to ethylene glycol is 1:1.2; add 30% of the molar percentage of terephthalic acid and 1,4- Butanediol, to synthesize a copolyester with a melting point of 180°C and an intrinsic viscosity of 0.5dl / g; then the copolyester is subjected to solid-state polycondensation for 36 hours at 170°C and a vacuum of less than 1kpa to further increase the intrinsic viscosity Increased to 1.0dl / g, copolyester additive with a melting point of 180°C; 2) The intrinsic viscosity of 5% of the total weight percentage of the additive, compatibilizer and polypropylene resin prepared in step 1) is 1.0dl / g copolyester additive and account for the compatibilizer EPDM-g-MA...

Embodiment 2

[0022] The preparation steps of the present embodiment are basically the same as in Example 1, except that the copolyester with an intrinsic viscosity of 1.0dl / g accounting for 10% of the total weight percentage of the additive, compatibilizer and polypropylene resin accounts for the additive, compatibilizer and polypropylene resin. EPDM-g-MAH with a total weight percentage of 2% of the compatibilizer and polypropylene resin and polypropylene with a melt index of 30g / 10min are blended and granulated at 200°C through a twin-screw extruder to prepare a dyeable modification containing additives. permanent polypropylene resin, the average particle size of the dispersed phase was measured to be 0.91 μm. See Table 1, which is a table showing the preparation process and results of the dyeable modified polypropylene resin in the embodiment of the present invention. The weight percentage of dyeable modified polypropylene resin and nylon is 70:30. Superfine composite fibers (165dtex / 36...

Embodiment 3

[0025] The preparation procedure of the present embodiment is basically the same as that of Example 1, the difference is: the copolyester with an intrinsic viscosity of 1.0dl / g accounting for 15% of the total weight percentage of the additive, compatibilizer and polypropylene resin, accounting for the additive, compatibilizer and polypropylene resin EPDM-g-MAH with a total weight percentage of 2% of the compatibilizer and polypropylene resin and polypropylene with a melt index of 30g / 10min are blended and granulated at 220°C through a twin-screw extruder to prepare a dyeable modified product containing additives. permanent polypropylene resin, and the average particle size of the dispersed phase was measured to be 0.95 μm. See Table 1, which is a table showing the preparation process and results of the dyeable modified polypropylene resin in the embodiment of the present invention. The weight percentage of dyeable modified polypropylene resin and nylon is 80:20. Superfine com...

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
Intrinsic viscosityaaaaaaaaaa
Intrinsic viscosityaaaaaaaaaa
The average particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of an ultrafine composite fiber with high wet transmitting performance, comprising the following steps of: 1) firstly preparing a copolyester additive having melting point of 180-220 DEG C and intrinsic viscosity of 1.0-1.2 dl / g and containing aliphatic dibasic acid and aliphatic dihydric alcohol by the combination of melt polycondensation and solid state polycondensation; 2) granulating by melt blending of the additive, a polyolefin elastomer graft multi-monomer compatilizer and polypropylene resin in a double screw extruder so as to prepare dyeable modified polypropylene resin with the particle size of dispersed phase being less than 1 micron; and 3) using the dyeable modified polypropylene resin prepared from the step 2) as a scaffold, using polyamide as splinter, and splitting fiber through mechanical force in subsequent alkali deweighting or processing into the ultrafine composite fiber with filament number being less than 0.2 dtex. The ultrafine composite fiber prepared by the method is soft, and has characteristics of high thermal stability, good spinning performance and excellent moisture conductivity and moisture absorption performance.

Description

technical field [0001] The invention relates to a method for preparing ultrafine composite fibers with high moisture permeability. It belongs to the chemical fiber field. Background technique [0002] Composite spinning methods for producing ultrafine denier fibers mainly include island-in-the-sea composite spinning and split-type composite spinning, among which split-type composite spinning is mainly based on polyester-nylon composite spinning, which utilizes the non-compatibility of polyester and nylon It is a relatively mature technology to obtain ultra-fine denier fibers by dividing fibers under the action of alkali reduction or certain mechanical force in the back channel. [0003] Studies have shown that in addition to the common characteristics of ordinary fine denier fibers such as softness, elegance, and skin-friendliness, the fine-denier polypropylene fiber also has good warmth retention, breathability, moisture conduction, hygiene, and lightness. However, becaus...

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): D01F8/06D01F8/12D01F1/10D01D5/30C08G63/183C08G63/80
Inventor 王秀华徐双喜杨国军杨美桂
Owner SHAOXING GLOBAL CHEM FIBER
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