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A kind of method for preparing black polylactic acid fiber by dope coloring

A technology of polylactic acid fiber and polylactic acid, which is applied in the field of fiber production, can solve the problems of black fiber materials such as weak mechanical properties and color fastness, and achieve the effects of reducing energy consumption, easy control of color depth, and uniform dyeing effect

Active Publication Date: 2020-11-06
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the mechanical property and the color fastness of the black fiber material that above-mentioned method obtains are still relatively weak, need to find a kind of method that prepares the colored polylactic acid fiber that has stronger mechanical property and more excellent color fastness

Method used

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  • A kind of method for preparing black polylactic acid fiber by dope coloring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Place the polylactic acid in a vacuum oven at 80°C for 24 hours, take 10 g of the dried polylactic acid and 0.15 g of non-ionic modified carbon black with a surface-grafted polylactic acid structure in a flask, stir and mix them thoroughly, and then add them to the double-cone micro mixer. Refining instrument, adjust the screw speed to 60rpm, raise the temperature of the left and right plates to 190°C, after the polylactic acid is melted and extruded, it is drawn to a small winding machine, and the winding speed is adjusted to 20m / min. After a period of time, it will be wound on the winding machine The fiber on the machine is taken off, placed in a water bath at 70° C. for drawing for 30 seconds, the degree of orientation of the fiber is improved and its length is elongated to 2 times of the original fiber. Take it out and let it dry at room temperature.

[0032] Non-ionic modified carbon black with polylactic acid structure grafted on the surface: add 2.5g silane coupl...

Embodiment 2

[0033] The impact of embodiment 2 modified carbon black consumption on fiber product

[0034] Referring to Example 1, the amount of non-ionic modified carbon black was replaced by 0.1 g, 0.2 g, 0.25 g, 0.3 g, 1 g, and 2 g respectively, and other conditions remained unchanged, and corresponding fiber products were prepared. The specific performance results of the product are shown in Table 1.

[0035] The performance result of the fiber obtained by the consumption of different nonionic modified carbon blacks in table 1

[0036] The amount of modified carbon black Strength (N / tex) Soaping fastness K / S CMC DE 0.1g 0.22 5 19.63 0.45 0.15g 0.37 5 20.23 0.23 0.2g 0.29 5 21.38 0.31 0.25g 0.23 5 22.10 0.29 0.3g 0.15 5 23.09 0.28 1g 0.12 5 23.55 0.25 2g 0.10 5 23.58 0.26

Embodiment 3

[0038] Referring to Example 1, the drafting time was replaced by 10s, 20s, 60s, and 300s respectively, and other conditions remained unchanged, and corresponding fiber products were prepared. The specific results are shown in Table 2.

[0039] Table 2 Performance results of fibers obtained at different drawing times

[0040] Drawing time (s) Strength (N / tex) Soaping fastness K / S CMC DE 10 0.27 5 20.23 0.25 20 0.30 5 20.22 0.23 60 0.35 5 20.00 0.23 300 0.33 5 20.12 0.21

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Abstract

The invention discloses a method for preparing black polylactic acid fiber by stock solution coloring, and belongs to the technical field of fiber production. The method comprises the steps as follows: modified carbon black and polylactic acid are added to a pulverizer to be pulverized and mixed, the mixture is added to a biconical micro mixer after being mixed sufficiently and evenly and is heated to a specified temperature to be melted and blended, the blended product is extruded and drafted into a winder, and the polylactic acid fiber is prepared. Properties such as mechanical properties, color depth and fiber diameter of the colored polylactic acid fiber can be effectively controlled by adjusting the conditions of carbon black types, the ratio of carbon black to polylactic acid, winding speed, drafting process and the like. The obtained polylactic acid fiber has high color fastness, easy-to-control color depth and little fiber difference between different batches in the same process, and is suitable for continuous production.

Description

technical field [0001] The invention specifically relates to a method for preparing black polylactic acid fibers by dope coloring, and belongs to the technical field of fiber production. Background technique [0002] Polylactic acid is a biocompatible polymer material derived from natural raw materials such as corn and soybeans. It is often used in medical fields such as surgical sutures, orthopedic fixation equipment, and controlled release of drugs. In recent years, due to breakthroughs in synthesis methods, the molecular weight and molecular weight distribution of polylactic acid have been well controlled, making it an important raw material for biomass fibers. In addition, polylactic acid fiber has mechanical properties comparable to polyester fiber, and also has the advantages of easy biodegradation, anti-wrinkle, anti-ultraviolet, high limiting oxygen index and good hydrophilicity. It is the most valued and has a good application prospect in the textile field. One of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/92D01F1/04D01D1/04D01D5/098
CPCD01D1/04D01D5/098D01F1/04D01F6/92
Inventor 付少海张丽平董浩李敏王冬刘明明
Owner JIANGNAN UNIV
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