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Colored polylactic acid tow and preparation method thereof

A polylactic acid, tow technology, applied in the manufacture of rayon, conjugated synthetic polymer rayon, filament/thread forming, etc., can solve the problems of affecting product stability, insecurity, easy color fading, etc. The effect of excellent color retention, enhanced differentiation, excellent coloring performance

Active Publication Date: 2021-01-01
SHENZHEN HUAYUAN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In view of the material characteristics of polylactic acid, in order to balance the comprehensive performance of the material, the existing dyes and dyeing methods are not easy to color the polylactic acid fiber, and even in the later stage of coloring, it is easy to fade and fade, which will affect the stability of the product, and will also cause consumers to lose color during use. psychological insecurity

Method used

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  • Colored polylactic acid tow and preparation method thereof
  • Colored polylactic acid tow and preparation method thereof
  • Colored polylactic acid tow and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A preparation method of colored polylactic acid tow, comprising the following steps:

[0043] 1) Preparation of as-spun silk: Mix 60 parts of polylactic acid (40% crystallinity, 30 g / 10min melt index) and 0.1 part of nano-silica in the core layer, and place them in a vacuum drum dryer at 80°C for 12 hours, then cool Put the material below 45°C into the hopper of a single-screw extruder; place 39.9 parts of polylactic acid (crystallinity 5%, melt index 20g / 10min) in a vacuum drum dryer at 60°C for 24 hours, and cool to The material is fed into the hopper of another single-screw extruder below 45°C; the screw temperature is set at a gradient of 185-195-205-215-225°C, the filter temperature is 240°C, the spinneret is 240°C, and the spinneret hole is a cross-shaped nozzle Silk holes, cooling temperature 28°C, traction speed 850m / min, oiling, winding, and falling into barrels to collect primary tow.

[0044] 2) Preparation of post-spinning colored tows: according to the req...

Embodiment 2

[0051]A preparation method of colored polylactic acid tow, comprising the following steps:

[0052] 1) Preparation of as-spun silk: the core layer is composed of 80 parts of polylactic acid (crystallinity 25%, melt index 25g / 10min), 0.08 parts of nano-titanium dioxide are mixed and placed in a vacuum drum dryer at 80 ° C for 12 hours, cooled to 45 Blow the material into the hopper of the single-screw extruder below ℃; place 19.98 parts of polylactic acid (crystallinity 10%, melt index 30g / 10min) in the skin layer composition in a vacuum drum dryer at 60 ℃ for 24 hours, and cool to 45 ℃ The following materials are discharged into the hopper of another single-screw extruder; the screw temperature is set at a gradient of 185-195-205-215-225°C, the filter temperature is 244°C, the spinneret is 248°C, and the spinneret hole is a cross-shaped spinneret hole , the cooling temperature is 37°C, the traction speed is 1100m / min, oiling, winding, and falling into barrels to collect the pr...

Embodiment 3

[0060] A preparation method of colored polylactic acid tow, comprising the following steps:

[0061] 1) Preparation of spun silk: the core layer is composed of 45 parts of polylactic acid (50% crystallinity, melt index 35g / 10min), 0.15 parts of carbon nanotubes are mixed and placed in a vacuum drum dryer at 80 ° C for 12 hours, cooled to Discharge the material below 45°C into the hopper of the single-screw extruder; place 54.85 parts of polylactic acid (crystallinity 15%, melt index 25g / 10min) in a vacuum drum dryer at 60°C for 24 hours and cool to 45°C. The material is discharged below ℃ into the hopper of another single-screw extruder; the screw temperature is set at a gradient of 185-195-205-215-225℃, the filter temperature is 237℃, the spinneret is 233℃, and the spinneret hole is H-shaped. Silk holes, cooling temperature 15°C, traction speed 650m / min, oiling, winding, and falling into barrels to collect primary tow.

[0062] 2) Preparation of post-spinning colored tows: a...

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Abstract

The present invention provides a colored polylactic acid tow. The tow comprises a material A, a material B, a proper amount of a coloring agent and a proper amount of a functional agent, and the material A comprises 45-89 wt% of crystalline polylactic acid and 0.02-0.2 wt% of a nucleating agent based on the total mass percentage of the tow; and the material B is prepared from 9.98 wt%-54.8 wt% ofamorphous polylactic acid according to the total mass percentage of the tow. The invention further discloses a preparation method of the colored polylactic acid tow, and the colored polylactic acid tow has excellent coloring performance and color retention while having good heat resistance.

Description

technical field [0001] The invention belongs to the technical field of chemical materials, and in particular relates to a colored polylactic acid tow, and also relates to a preparation method of the colored polylactic acid tow. Background technique [0002] Polylactic acid (PLA) is a new type of biodegradable material. It is prepared from renewable crop starch (such as corn, cassava, sugarcane, etc.) as raw material. PLA has good biodegradability. After use, it goes through a natural degradation process such as composting, and the final degradation products are carbon dioxide and water. Therefore, it will not pollute the environment, consume high energy, and will not generate additional carbon dioxide. [0003] At present, polylactic acid is also widely used in the fiber textile industry, such as for the manufacture of non-woven fabrics, health care fabrics, carpets, etc. As people's requirements for product differentiation, functionality and diversification are getting hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/14D01F1/10D01D5/34
CPCD01F8/14D01F1/10D01D5/34Y02W90/10
Inventor 卢集伟王成乐
Owner SHENZHEN HUAYUAN NEW MATERIAL CO LTD
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