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Preparation method of hydrolysis-resistant modified polylactic acid fibers

A polylactic acid fiber, anti-hydrolysis technology, applied in the direction of melt spinning, stretch spinning, single-component polyester rayon, etc., to avoid deterioration of mechanical properties, excellent hand feel and softness, and realize large-scale production Effect

Inactive Publication Date: 2012-09-12
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There are a lot of reports in the field of plastics to improve the flexibility of polylactic acid by plasticization, but there is no report on the use of plasticized modified polylactic acid fiber

Method used

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  • Preparation method of hydrolysis-resistant modified polylactic acid fibers
  • Preparation method of hydrolysis-resistant modified polylactic acid fibers
  • Preparation method of hydrolysis-resistant modified polylactic acid fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Dry the PLA particles in vacuum until the moisture content is 100ppm-500ppm, mix 945g polylactic acid, 50g polytrimethylene adipate (weight average molecular weight 20000-30000), and 5g multifunctional polycarbodiimide in a container , and then use a twin-screw extruder for melt blending, the extrusion temperature is 190°C, the screw speed is 100rpm, and it can be cooled and dried after granulation. The vacuum-dried masterbatch chips were melt-spun by a single-component spinning machine, wherein the spinning temperature was 215° C. and the winding speed was 600 m / min to obtain pre-drawn filaments. The post-drawing of the as-spun fibers was carried out with a hot plate and a hot plate, the temperature of the hot plate was 90°C, the temperature of the hot plate was 120°C, and the draft ratio was 4.5.

[0032] The main components of the multifunctional polycarbodiimide include carbodiimide oligomers (with a weight-average molecular weight of 500) and poly(p-phenylene carbo...

Embodiment 2

[0034] Dry the PLA particles in vacuum until the moisture content is 100ppm-500ppm, put 890g polylactic acid, 100g polybutylene adipate (weight average molecular weight 6000-7000), and 10g multifunctional polycarbodiimide in a container Mix evenly, and then use a twin-screw extruder for melt blending, the extrusion temperature is 185°C, the screw speed is 150rpm, and it can be cooled and dried after granulation. The vacuum-dried masterbatch slices were melt-spun by a single-component spinning machine, wherein the spinning temperature was 210° C. and the winding speed was 600 m / min to obtain pre-drawn filaments. The post-drawing of the as-spun fibers was carried out with a hot plate and a hot plate, the temperature of the hot plate was 90°C, the temperature of the hot plate was 115°C, and the draft ratio was 4.3.

[0035] The main components of the multifunctional polycarbodiimide include carbodiimide oligomers (with a weight average molecular weight of 600) and poly(diisopropy...

Embodiment 3

[0037] Dry the PLA particles in vacuum until the moisture content is 100ppm-500ppm, mix 840g polylactic acid, 150g polytrimethylene sebacate (weight average molecular weight 4000-5000), and 10g multifunctional polycarbodiimide in a container , and then use a twin-screw extruder for melt blending, the extrusion temperature is 180°C, the screw speed is 80rpm, and it can be cooled and dried after granulation. The vacuum-dried masterbatch slices are melt-spun by a single-component spinning machine, wherein the spinning temperature is 200°C and the winding speed is 800m / min to obtain pre-drawn filaments. The post-drawing of the as-spun fibers was carried out with a hot plate and a hot plate, the temperature of the hot plate was 80°C, the temperature of the hot plate was 120°C, and the draft ratio was 4.1.

[0038]The main components of the multifunctional polycarbodiimide include carbodiimide oligomers (with a weight-average molecular weight of 700) and poly(diisopropylcarbodiimide...

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Abstract

The invention relates to a preparation method of hydrolysis-resistant modified polylactic acid fibers. The preparation method comprises the following steps of uniformly mixing 70 to 98.9 parts by weight of polylactic acid, 1 to 30 parts by weight of one or more low-molecular weight polyesters and 0.1 to 5.0 parts by weight of multifunctional polycarbodiimides, carrying out melt blending granulation of the mixture to obtain master batches, carrying out vacuum drying of the master batches, carrying out melt spinning and winding to obtain winded wires, and carrying out drafting to obtain the hydrolysis-resistant modified polylactic acid fibers. The preparation method is simple, has a low cost and is suitable for large-scale production. The hydrolysis-resistant modified polylactic acid fibers have excellent handle and softness, realize low temperature dying, have high dye-uptake in high temperature dying and have good hydrolysis resistance so that the problem of mechanical property degradation produced in high temperature treatment is avoided.

Description

technical field [0001] The invention belongs to the field of preparation of polylactic acid fibers, in particular to a preparation method of hydrolysis-resistant modified polylactic acid fibers. Background technique [0002] At present, the increasing shortage of global oil resources has gradually become a serious problem restricting the development of the chemical fiber industry. At the same time, the demand for energy saving, emission reduction and environmental protection has also prompted the chemical fiber industry to pay more attention to environmental protection and reduce energy consumption. Polymers used in clothing and fiber fields are mainly polyethylene terephthalate (PET), and its consumption accounts for more than 40% of global textile consumption (second only to cotton), ranking second, and its consumption is still It is constantly increasing, but the production of this polyester product needs to consume petroleum resources, and it is not biodegradable, so it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92B29B9/06D01D5/08D01D5/12
Inventor 余木火尤伟杨淳何娇韩克清潘礼存孟涛
Owner DONGHUA UNIV
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