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Preparation method of elastic polylactic acid fiber

A polylactic acid fiber, polylactic acid technology, applied in the chemical characteristics of fibers, melt spinning, stretch spinning, etc., can solve the problems of high hardness, high addition amount, high brittleness, etc., and achieve good spinning formability and marketability. The effect of broad prospects and excellent fiber quality

Active Publication Date: 2013-08-21
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its high brittleness and high hardness limit its further application, especially in the field of fiber
[0003] The polymers currently used for toughening modified PLA include starch, polybutylene adipate-co-ethylene terephthalate, polycarbonate, polycaprolactone, etc., but due to the existence of two-phase The interaction force is weak, the addition amount is high, the toughening effect is not obvious, and it is not suitable for melt spinning and other reasons, so it cannot expand its application field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Dry 1Kg of polylactic acid slices at 80°C for 6 hours, then mix them with 40g of maleic anhydride and 4g of dicumyl peroxide, add them to the Haake torque rheometer, and melt at 180°C Blending, banburying time is 30min, screw speed is 50rpm, cooling and granulation to obtain grafted polylactic acid masterbatch.

[0031] (2) Melt and blend 4Kg of dried polylactic acid chips and 1Kg of grafted polylactic acid masterbatch in a twin-screw extruder. The temperatures in each zone of the twin-screw are 140°C, 170°C, 180°C, 180°C, and 175°C. , the screw speed is 100rpm, cooled and granulated to obtain the modified polylactic acid masterbatch.

[0032] (3) Dry 5Kg of modified polylactic acid masterbatch and 250g of thermoplastic polyurethane chips at 80°C for 6 hours and 12 hours respectively, and then add twin-screw blending and granulation to obtain toughened polylactic acid masterbatch. The temperatures in each zone of the twin-screw are respectively 210°C, 215°C, 220°C,...

Embodiment 2

[0035] (1) Dry 1Kg of polylactic acid slices at 80°C for 6 hours, then mix them with 50g of maleic anhydride and 5g of dicumyl peroxide, add them to a Huck torque rheometer, and melt at 180°C Blending, banburying time is 40min, screw speed is 50rpm, cooling and granulation to obtain grafted polylactic acid masterbatch.

[0036] (2) Melt and blend 4Kg of dried polylactic acid chips and 1Kg of grafted polylactic acid masterbatch in a twin-screw extruder. The temperatures in each zone of the twin-screw are 140°C, 170°C, 180°C, 180°C, and 175°C. , the screw speed is 100rpm, cooled and granulated to obtain the modified polylactic acid masterbatch.

[0037] (3) Dry 5Kg of modified polylactic acid masterbatch and 500g of thermoplastic polyurethane chips at 80°C for 6 hours and 12 hours respectively, and then add twin-screw blending and granulation to obtain toughened polylactic acid masterbatch. The temperatures in each zone of the twin-screw are respectively 210°C, 215°C, 220°C, 22...

Embodiment 3

[0040] (1) Dry 1Kg of polylactic acid slices at 80°C for 6 hours, then mix them with 50g of maleic anhydride and 5g of di-tert-butyl peroxide, add them to a Haake torque rheometer, and melt at 180°C Blending, banburying time is 30min, screw speed is 50rpm, cooling and granulation to obtain grafted polylactic acid masterbatch.

[0041] (2) Melt and blend 4Kg of dried polylactic acid chips and 1Kg of grafted polylactic acid masterbatch in a twin-screw extruder. The temperatures in each zone of the twin-screw are 140°C, 170°C, 180°C, 180°C, and 175°C. , the screw speed is 100rpm, cooled and granulated to obtain the modified polylactic acid masterbatch.

[0042] (3) Dry 5Kg of modified polylactic acid masterbatch and 750g of thermoplastic polyurethane chips at 80°C for 6 hours and 12 hours respectively, and then add twin-screw blending and granulation to obtain toughened polylactic acid masterbatch. The temperatures in each zone of the twin-screw are respectively 210°C, 215°C, 22...

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Abstract

The invention relates to a preparation method of elastic polylactic acid fiber. The method comprises the following steps of: (1) uniformly mixing a polylactic acid section, a compatibilizer, and an initiator, and then carrying out reactive melt blending to obtain a grafted polylactic acid master batch; (2) uniformly mixing the grafted polylactic acid master batch and the polylactic acid section, and carrying out melt blending and cooling granulating to obtain a modified polylactic acid master batch; (3) uniformly mixing the modified polylactic acid master batch and a toughening agent, and carrying out melt blending and cooling granulating to obtain a toughened polylactic acid master batch; and (4) spinning the toughened polylactic acid master batch to obtain as-spun fiber, and at last drawing the as-spun fiber and processing the drawn fiber to obtain the elastic polylactic acid fiber. The elastic polylactic acid fiber material prepared by the preparation method provided by the invention is good in spinning molding performance, excellent in fiber quality, environment-friendly and wide in market prospect, and can be applied to the fields having quite high requirements for resilience performance, such as garment, interior trim, and medical application.

Description

technical field [0001] The invention belongs to the field of preparation of polylactic acid fibers, in particular to a preparation method of elastic polylactic acid fibers. Background technique [0002] Polylactic acid is a kind of thermoplastic aliphatic polyester prepared by chemical synthesis using plant resources as raw materials. Its resources are renewable, biodegradable, with good biocompatibility and processing performance, and have broad market prospects. However, its high brittleness and high hardness limit its further application, especially in the field of fiber. [0003] The polymers currently used for toughening modified PLA include starch, polybutylene adipate-co-ethylene terephthalate, polycarbonate, polycaprolactone, etc., but due to the existence of two-phase The interaction force is weak, the addition amount is high, the toughening effect is not obvious, and it is not suitable for melt spinning and other reasons, so its application field cannot be expande...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/14D01F1/10D01D5/08D01D5/12
Inventor 朱美芳王世超相恒学王仁林洪森林
Owner DONGHUA UNIV
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