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Modified polylactic acid fiber and preparation method thereof

A polylactic acid fiber, polylactic acid technology, applied in the chemical characteristics of fibers, melt spinning, rayon manufacturing and other directions, can solve the problems of short service life, poor wear resistance, spinning difficulties, etc., and achieve excellent flexibility and cheap raw materials. , the effect of low equipment requirements

Active Publication Date: 2013-07-31
长沙乐远化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the defects of polylactic acid fibers in the prior art, such as difficulty in spinning due to easy hydrolysis, short service life and high cost due to poor wear resistance, and aims to provide a fully biodegradable polylactic acid fiber with hydrolysis resistance and spinning performance Good, flexible, friction-resistant, easy-to-dye modified polylactic acid fiber

Method used

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  • Modified polylactic acid fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Vacuum-dry the polylactic acid slices until the water content is 30-150ppm; 22 parts of polylactic acid; 8 parts of ethyl cellulose; 4 parts of cellulose diacetate grafted polylactic acid copolymer; 5 parts of polyoxyethylene wax; 0.5 part; 0.3 part of nucleating agent; 0.2 part (weight fraction) of antioxidant was added to the high-speed mixer, and the modified polylactic acid mixture was obtained after high-speed dispersion for 30 minutes; the uniformly mixed modified polylactic acid mixture was extruded through a twin-screw Melt blending and extrusion to prepare modified polylactic acid functional masterbatch slices, and vacuum dry to a moisture content of 30-150ppm;

[0037] Put 40 parts of the above-mentioned modified polylactic acid functional masterbatch chips and 60 parts of vacuum-dried polylactic acid chips into a high-speed mixer and dry mix for 5 minutes, and the mixture is spun on a melt spinning machine through circular spinneret holes to obtain modified po...

Embodiment 2

[0040] Vacuum-dry the polylactic acid slices until the moisture content is 30-150ppm; 22 parts of polylactic acid; 8 parts of methyl cellulose; 4 parts of polylactic acid copolymer grafted with cellulose diacetate; 5 parts of fatty alcohol polyoxyethylene ether; 0.5 part of talc powder; 0.3 part of nucleating agent; 0.2 part of antioxidant (weight fraction) was added to the high-speed mixer, and the modified polylactic acid mixture was obtained after high-speed dispersion for 30 minutes; the uniformly mixed modified polylactic acid mixture was passed through a double The modified polylactic acid functional masterbatch slices were prepared by melt blending and extruding with a screw extruder, and dried in vacuum until the moisture content was 30-150ppm;

[0041] Put 40 parts of the above-mentioned modified polylactic acid functional masterbatch chips and 60 parts of vacuum-dried polylactic acid chips into a high-speed mixer and dry mix for 5 minutes, and the mixture is spun on a...

Embodiment 3

[0044] Vacuum-dry the polylactic acid slices until the water content is 30-150ppm; 22 parts of polylactic acid; 8 parts of cellulose acetate butyrate; 4 parts of cellulose diacetate grafted polylactic acid copolymer; 5 parts of polyoxyethylene wax; 0.5 parts of powder; 0.3 parts of nucleating agent; 0.2 parts of antioxidant (weight fraction) were added to the high-speed mixer, and the modified polylactic acid mixture was obtained after high-speed dispersion for 30 minutes; the uniformly mixed modified polylactic acid mixture was passed through the twin-screw The modified polylactic acid functional masterbatch slices are prepared by melt blending and extruding in an extruder, and vacuum-dried to a moisture content of 30-150ppm;

[0045] Put 40 parts of the above-mentioned modified polylactic acid functional masterbatch chips and 60 parts of vacuum-dried polylactic acid chips into a high-speed mixer and dry mix for 5 minutes, and the mixture is spun on a melt spinning machine thr...

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Abstract

The invention discloses a modified polylactic acid fiber and a preparation method thereof. The modified polylactic acid fiber is prepared through blending polylactic acid, a cellulose derivative, a cellulose diacetate grafted polylactic acid copolymer, a lubricant, inorganic nanoparticles, a nucleating agent and an antioxidant. The preparation method comprises the following steps: adding partial polylactic acid slices and all other raw materials to a high speed mixer according to a mass component ratio, carrying out high speed dispersion, and carrying out melt blending and extrusion through a double screw extruder to obtain modified polylactic acid master batch slices; and carrying out dry mixing of the modified polylactic acid master batch slices and residual polylactic acid slices in the high speed mixer, carrying out melt spinning through a melt spinning machine, and stretching to obtain the modified polylactic acid fiber. The prepared polylactic acid fiber has the advantages of low cost, complete biodegradation, environmental protection, good spinning performance, stable filament bundle quality, excellent flexibility, excellent antifriction, excellent dyeing property and excellent comfortableness, and is a very good high-performance environmentally-friendly fiber material. The preparation method has the advantages of simplicity, low equipment requirement, and environmental protection in the production process, and is in favor of the industrialized production.

Description

technical field [0001] The invention relates to a modified polylactic acid fiber and a preparation method thereof, belonging to the field of polymer material modification. Background technique [0002] Since the emergence of synthetic fiber, its development speed is very fast, and its consumption is particularly huge, but its waste after use has caused a great threat to the environment. From the viewpoint of environmental protection, research and development of biodegradable fiber raw materials has become very urgent. At present, the synthesis technology of polylactic acid is gradually mature. Polylactic acid fiber, commonly known as corn fiber, is a new generation of environmentally friendly polyester fiber that is completely biodegradable. Polylactic acid fiber uses plants as raw materials, and its products can be decomposed into carbon dioxide and water by microorganisms when discarded in soil or seawater, and will not emit toxic gas and cause environmental pollution whe...

Claims

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Application Information

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IPC IPC(8): D01F6/92D01F1/10D01D5/08C08L67/04
Inventor 黄凯兵李伟罗涛王建
Owner 长沙乐远化工科技有限公司
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