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Preparation method of elastic fiber based on biomass polyester

An elastic fiber and biomass technology, which is applied in the field of elastic fiber preparation, can solve the problems of serious post-crystallization phenomenon, narrow processing window, bottleneck of processing technology, etc., and achieve the effect of widening the temperature of processing window and improving fiber-forming performance.

Inactive Publication Date: 2012-07-18
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nevertheless, P(3HB-co-4HB) also has problems such as narrow processing window and serious post-crystallization phenomenon, which largely limits its deep development and application, especially in the fiber field. Processing Technology Bottleneck

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] EVA and P(3HB-co-4HB) with a melt flow index of 15g / 10min and a VAC content of 14wt.% were dried under vacuum at 70°C and 95°C for 8h and 30h respectively, and the residual pressure of the drying system was 60-200Pa. The dried slices are fully mixed evenly according to the mass ratio of 1.5:100, and sent to the pre-spinning hopper under the protection of nitrogen, plasticized and melted at 130°C-150°C in the screw extruder, and then spun at 130°C. , the filaments are air-cooled and wound with a winding machine to obtain primary fibers, wherein the winding speed is three times the extrusion speed of the filaments from the spinneret hole; after the primary fibers are equilibrated at room temperature for 24 hours, they are heated in hot air at 85°C Stretch 10 times in middle, obtain EVA-P (3HB-co-4HB) blended fiber, the breaking strength of fiber is 1.03cN / dtex, and breaking elongation is 293.31%, when elongation is respectively 50%, 100% When and 150%, the elastic recover...

Embodiment 2

[0028] EVA and P(3HB-co-4HB) with a melt flow index of 15g / 10min and a VAC content of 14wt.% were dried under vacuum at 70°C and 90°C for 10h and 24h, respectively, and the residual pressure of the drying system was 60-200Pa. The dried slices are fully mixed evenly according to the mass ratio of 3:100, and sent to the pre-spinning hopper under the protection of nitrogen, plasticized and melted at 125°C-160°C in the screw extruder, and then spun at 140°C Forming, the filaments are air-cooled and wound with a winder to obtain primary fibers, wherein the winding speed is twice the extrusion speed of the filaments (from the spinneret hole); after the primary fibers are equilibrated at room temperature for 24 hours, they are heated at 70°C Stretch 15 times in the hot air of hot air, obtain EVA / P (3HB-co-4HB) blended fiber, record that the breaking strength of fiber is 1.26cN / dtex, and breaking elongation is 240.65%; When elongation is respectively When 50%, 100% and 150%, the fiber...

Embodiment 3

[0030] EVA and P(3HB-co-4HB) with a melt flow index of 15g / 10min and a VAC content of 19wt.% were dried under vacuum at 80°C and 95°C for 8h and 27h respectively, and the residual pressure of the drying system was 60-200Pa. The dried slices are fully mixed evenly according to the mass ratio of 5:100, and sent to the pre-spinning hopper under the protection of nitrogen, plasticized and melted at 130°C-165°C in the screw extruder, and then spun at 145°C Forming, the filaments are air-cooled and wound with a winding machine to obtain primary fibers, wherein the winding speed is 5 times the extrusion speed of the filaments (from the spinneret hole); after the primary fibers are equilibrated at room temperature for 24 hours, they are heated at 90°C Stretch 15 times in hot air, obtain EVA / P (3HB-co-4HB) blend fiber, the breaking strength of fiber is 1.26cN / dtex, and breaking elongation is 200.63%; When elongation is respectively 50% , 100% and 150%, the fiber elastic recovery rate i...

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Abstract

A preparation method of elastic fiber based on biomass polyester comprises the steps of respectively drying biomass polyester and elastic polymer on the vacuum condition, evenly mixing, sending into a pre-spinning hopper under the protection of nitrogen, melting through a screw extruder to be extruded in quantitative mode from a spinneret orifice, coiling to obtain protofiber after air cooling, oiling the obtained protofiber, balancing at room temperature for 24 hours, then stretching in hot air, balancing and shrinking the stretched fiber at room temperature to achieve the elastic fiber based on the biomass polymer.

Description

technical field [0001] The invention relates to a method for preparing elastic fibers, in particular to a method for preparing elastic fibers based on biomass polyester, and belongs to the technical field of high-tech or differentiated fiber production. Background technique [0002] Polyhydroxyalkanoate (PHA) is a kind of biomass polyester, which is synthesized by many prokaryotic microorganisms under unbalanced growth conditions (such as excess carbon source and insufficient other nutrient conditions such as nitrogen, phosphorus, magnesium or oxygen, etc.). an intracellular polyester. Its development began in the 1930s, and so far there are more than 90 kinds of products, which are mainly divided into the following four generations: 3-hydroxybutyrate homopolymer (PHB), 3-hydroxybutyrate 3-hydroxypentyl Random copolymer of acid esters (PHBV), poly 3-hydroxybutyrate 3-hydroxyhexanoate [P(HB-co-HHx)], poly 3-hydroxybutyrate 4-hydroxybutyrate [P (3HB-co-4HB)]. Because PHA ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01D5/08D01D5/12
Inventor 郭静胡成女
Owner DALIAN POLYTECHNIC UNIVERSITY
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