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Preparation method of colored polyethylene fiber with ultrahigh relative molecular mass

A relative molecular weight, polyethylene fiber technology, applied in the direction of single-component polyolefin rayon, dyeing, textile and papermaking, etc. Simple manufacturing process, easy industrial production, and low production cost

Active Publication Date: 2014-02-19
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has the following disadvantages in adding dye particles to the spinning stock solution. The one is that the addition of dye particles may increase the viscosity of the spinning stock solution and affect its spinnability; Uneven particle dispersion leads to weak points in the fiber, which affects the subsequent stretching of the fiber, thereby affecting its mechanical properties; third, because the spinning is carried out at a higher temperature (250-300 ° C), the choice of dye particles is limited; It is difficult to clean the equipment due to the addition of pigment particles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation of black UHMWPE fiber

[0027] Use disazo solvent black (molecular formula: C 29 h 24 N 6 ) is a dye additive, which is mixed with ethanol at a mass ratio of 1:1000, and ultrasonically oscillated for 20 minutes to dissolve the dye evenly to obtain a black dye solution. The UHMWPE dry jelly fiber after extraction and removal of the solvent was placed in the dye solution, ultrasonicated for 20 minutes, dried at room temperature, and then subjected to three-stage thermal stretching at 80-110°C, with a total stretching ratio of 42 times, to obtain black UHMWPE fiber. The strength of the obtained black UHMWPE fiber is 32.5cN / dtex.

Embodiment 2

[0029] Preparation of red UHMWPE fiber

[0030] Iron oxide red with a particle size of less than 1um was selected as the pigment additive, mixed with iron oxide red and xylene at a mass ratio of 1:500, and ultrasonically oscillated for 30 minutes to make the pigment particles uniformly dispersed to obtain a red dye solution. After extraction and drying, the UHMWPE dry jelly fiber with a solvent content of 1.5% is placed in the dyeing solution, ultrasonicated for 40 minutes, taken out, dried at room temperature, and then subjected to three-stage thermal stretching at 80-110°C. The total stretching ratio is 35 times, the strength of the red UHMWPE fiber is 28.5cN / dtex.

Embodiment 3

[0032] Preparation of blue UHMWPE fiber

[0033] Anthraquinone solvent blue (molecular formula: C 22 h 18 N 2 o 2 ) is a dye, which is mixed with ethanol at a mass ratio of 1:800, and ultrasonically oscillated for 20 minutes to dissolve the dye evenly to obtain a black dye solution. The UHMWPE dry jelly fiber after extraction and removal of the solvent is placed in the dyeing solution, ultrasonicated for 30 minutes, dried at room temperature, and then subjected to three-stage thermal stretching at 80-110°C. The total stretching ratio is 42 times, and the green UHMWPE fiber is obtained. The strength is 30.8cN / dtex.

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Abstract

The invention relates to a preparation method of a colored polyethylene fiber with ultrahigh relative molecular mass. The preparation method comprises the following steps: mixing dye or pigment powder with a solvent and stirring, while carrying out ultrasonic vibration to obtain uniform dyed bath liquid; (2) extracting and drying UHMWPE (Ultrahigh Molecular Weight Polyethylene) jelly fiber, and winding the fiber to obtain dried UHMWPE jelly fiber; (3) placing the dried UHMWPE jelly fiber to the dyed bath liquid which is obtained in the step (1) to carry out ultrasonic vibration for 10-50 min, taking out and drying the fiber to obtain colored dried UHMWPE jelly fiber; (4) carrying out multistage thermal stretch and winding the colored dried UHMWPE jelly fiber to obtain the colored UHMWPE fiber. The technical process is simple, low in production cost, easy to realize industrial production, wide in selection of dye or pigment powder, will not influence the original excellent mechanical property of the UHMWPE fiber, and is suitable for the fields with the color requirement such as civil use, military use and national defense.

Description

technical field [0001] The invention belongs to the field of preparation of colored fibers, in particular to a method for preparing colored ultra-high molecular weight polyethylene (UHMWPE) fibers. Background technique [0002] UHMWPE fiber is the third generation of high-performance special fiber after carbon fiber and aramid fiber. Because of its high molecular weight, good main chain combination, high degree of orientation and crystallinity, and the highest strength of all new chemical fiber materials today, it is used in the military industry. It plays an irreplaceable role in the field of aviation and aerospace. In addition to playing an extremely important role in military, national defense and other fields, UHMWPE fibers have also been widely used in civilian fields. With the expansion of the application of UHMWPE fiber in marine engineering and fishery fields, the demand for colored UHMWPE fiber is increasing. [0003] Patent CN103074786A discloses a method for dye...

Claims

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Application Information

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IPC IPC(8): D01F6/04D06P3/79D06P1/00D06P1/44D06P5/20D06P5/02
Inventor 于俊荣胡祖明诸静王彦陈蕾李燕
Owner DONGHUA UNIV
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