High hydrolysis-resistant polylactic acid fiber suitable for fishing nets and clothing and preparation method thereof

A technology of polylactic acid fiber and polylactic acid resin, applied in the field of preparation of polymer materials, can solve problems such as gel point, toxicity, human health and environmental hazards, achieve excellent decontamination and self-cleaning, improve hydrolysis resistance, Good water and oil repellent properties

Active Publication Date: 2018-08-07
WEIHAI LIANGAN ENVIRONMENTAL PROTECTION NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Although the above methods can improve the hydrolysis resistance of polylactic acid fibers, these three methods generally use multifunctional compounds to react with the carboxyl groups at the end of the polylactic acid molecular chain, and it is easy to cause the reaction system to become unstable due to uneven dispersion of the antihydrolysis agent. Gel point appears, which affects the quality of modified polylactic acid products
In addition, the carbodiimide antihydrolysis agent in method (1) itself is toxic, especially the gas generated after decomposition is highly carcinogenic and has great harm to human health and the environment, so this method is not suitable for large-scale chemical production application

Method used

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  • High hydrolysis-resistant polylactic acid fiber suitable for fishing nets and clothing and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0019] After the polylactic acid resin (the number average molecular weight Mn is 80,000) is dried, take by weight the polylactic acid resin of 99.99 parts and the fluorine-containing alcohol end-capping agent CF of 0.01 part 3 (CF 2 ) 10 CH 2 OH is mixed, and the homogeneously mixed mixture is melt-spun through a spinning machine, wherein the spinning temperature is 200° C., and the winding speed is 2000 m / min to obtain pre-oriented yarns. The pre-oriented yarn was drawn, the temperature of the first hot roll was 50°C, the temperature of the second hot roll was 80°C, and the draft ratio was 1.2 to obtain polylactic acid fibers with high hydrolysis resistance, and the performance before and after hydrolysis was tested.

Embodiment 2

[0021] After the polylactic acid resin (the number average molecular weight Mn is 150,000) is dried, take by weight the polylactic acid resin of 99.5 parts and the fluorine-containing alcohol end-capping agent CF of 0.5 part 3 (CF 2 ) 5 SO 2 NCH 3 (CH 2 ) 2 OH mixing, the uniformly mixed mixture is first granulated into slices through a twin-screw extruder, and then the slices are dried and then melt-spun through a spinning machine; the temperature of each zone of the twin-screw extruder is 150-220°C, and the screw speed 240 rpm; the spinning temperature is 210° C., and the winding speed is 2200 m / min to obtain pre-oriented yarns. The pre-oriented yarn was drawn, the temperature of the first hot roll was 70°C, the temperature of the second hot roll was 110°C, and the draw ratio was 2 to obtain polylactic acid fibers with high hydrolysis resistance. The performance before and after hydrolysis was tested.

Embodiment 3

[0023] After the polylactic acid resin (number-average molecular weight Mn is 200,000) is dried, take by weight 94 parts of polylactic acid resin and 6 parts of fluorine-containing alcohol end-blocking agent CF 3 (CF 2 ) 100 N M 2 CH 2 OH mixing, the uniformly mixed mixture is first granulated into slices through a twin-screw extruder, and then the slices are dried and then melt-spun through a spinning machine; the temperature of each zone of the twin-screw extruder is 150-220°C, and the screw speed 350 rpm; the spinning temperature is 230° C., and the winding speed is 2500 m / min to obtain pre-oriented yarns. The pre-oriented yarn was drawn, the temperature of the first hot roll was 100°C, the temperature of the second hot roll was 140°C, and the draw ratio was 5 to obtain polylactic acid fibers with high hydrolysis resistance. The performance before and after hydrolysis was tested.

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Abstract

The invention relates to a highly hydrolysis-resistant polylactic acid fiber suitable for fishing nets and clothing and a preparation method thereof, belonging to the field of polymer materials. After drying the polylactic acid resin, weigh 94-99.99 parts of polylactic acid resin and 0.01-6 parts of fluorine-containing alcohol end-capping agent by weight and mix them, and melt the homogeneously mixed mixture through a spinning machine for spinning, Winding, stretching to obtain highly hydrolysis-resistant polylactic acid fibers; or after the polylactic acid resin is dried, take by weight 94-99.99 parts of polylactic acid resin and 0.01-6 parts of fluorine-containing alcohol end-capping agent and mix, The uniformly mixed mixture is first granulated into slices through a twin-screw extruder, and then the slices are dried and melt-spun, wound, and drawn through a spinning machine to obtain high-hydrolysis-resistant polylactic acid fibers.

Description

technical field [0001] The invention relates to the field of preparation of polymer materials, in particular to a highly hydrolysis-resistant polylactic acid fiber suitable for fishing nets and clothing and a preparation method thereof. Background technique [0002] As we all know, polylactic acid (PLA) is a biodegradable polymer material made of starch extracted from plants, fermented into lactic acid, and further polymerized. PLA has excellent mechanical properties and spinning properties. After the fishing net made of polylactic acid fiber is used and discarded, it can be completely degraded into H2 under the action of seawater or natural microorganisms. 2 O and CO 2 Compared with fishing nets made of traditional non-degradable fibers, it can well solve the pollution of abandoned fishing nets to the marine environment. [0003] In addition, the clothing fabric made of polylactic acid fiber has good drapability, curlability and shape retention, and has a soft hand feelin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/92D01F1/10D01D1/04D01D5/16
Inventor 王新灵孙波陶寅松
Owner WEIHAI LIANGAN ENVIRONMENTAL PROTECTION NEW MATERIAL TECH CO LTD
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