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Preparation method of high-tenacity flame-retardant polyester filament

A technology of flame-retardant polyester and filament, which is applied in the field of preparation of high-strength flame-retardant polyester filament, can solve problems such as explosion and easy accumulation of electric charges, and achieve the effect of simple equipment, low price, and life safety guarantee

Inactive Publication Date: 2015-12-23
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In low-humidity and dusty places like coal mines, it is easier to accumulate charges and cause safety hazards such as explosions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add EG and PTA from the front of the twin-screw at a molar ratio of 1.1:1, control the polycondensation temperature at 225°C, and the internal pressure of the screw at 4kg / cm 2 , the screw length-to-diameter ratio is 42, using continuous heat N 2 Protect. Add the mixture of polyphosphate amine-polyaniline from the middle of the twin-screw, the consumption of polyphosphate amine is 2wt% of the total amount of PTA and EG, and the consumption of polyaniline is 1wt% of the total amount of PTA and EG. The temperature inside the twin-screw is 280° C., the pressure is 20 MPa, and the screw speed is 100 r / min.

[0027] The obtained molten spinning solution is extruded into the spinning assembly, the spinneret specification is 500 holes, the hole diameter is 0.4mm, the temperature of the spinning chamber is 23±2° C., and the humidity is 60±3%. The blowing temperature of the spinning ring is 20° C., and the wind speed is 1 m / s. The godet speed is 800m / min. First-stage draftin...

Embodiment 2

[0029] Add EG and PTA from the front of the twin-screw at a molar ratio of 1.1:1, control the polycondensation temperature at 230°C, and the internal pressure of the screw at 4kg / cm 2 , the screw length-to-diameter ratio is 50, using continuous heat N 2 Protect. Add the mixture of polyphosphate amine-polyaniline from the middle of the twin-screw, the consumption of polyphosphate amine is 7wt% of the total amount of PTA and EG, and the consumption of polyaniline is 1wt% of the total amount of PTA and EG. The temperature inside the twin-screw is 280° C., the pressure is 20 MPa, and the screw speed is 120 r / min.

[0030] The obtained molten spinning solution is extruded into the spinning assembly, the spinneret specification is 1000 holes, the hole diameter is 0.4mm, the temperature of the spinning chamber is 23±2° C., and the humidity is 60±3%. The blowing temperature of the spinning ring is 20° C., and the wind speed is 1 m / s. The godet speed is 1000m / min. First-stage draft...

Embodiment 3

[0032] Add EG and PTA from the front of the twin-screw at a molar ratio of 1.15:1, control the polycondensation temperature to 240°C, and the pressure inside the screw to 4.5kg / cm 2 , the screw length-to-diameter ratio is 55 using continuous heat N 2 Protect. Add antimony pentoxide-chitosan mixture from the middle of the twin-screw, the consumption of antimony pentoxide is 4wt% of the total amount of PTA and EG, and the consumption of polyaniline is 2wt% of the total amount of PTA and EG. The temperature inside the twin-screw is 285° C., the pressure is 25 MPa, and the screw speed is 140 r / min.

[0033] The obtained molten spinning solution is extruded into the spinning assembly, the spinneret specification is 1500 holes, the hole diameter is 0.3mm, the temperature of the spinning chamber is 23±2° C., and the humidity is 60±3%. The blowing temperature of the spinning ring is 25° C., and the wind speed is 2 m / s. The godet speed is 1200m / min. First-stage drafting of primary ...

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Abstract

The invention relates to a preparation method of a high-tenacity flame-retardant polyester filament, which comprises the following steps: adding PTA and EG into a charging opening at the front part of a double-screw device for copolymerization to obtain PET; adding a flame retardant and an anti-static agent into a charging opening at the middle part of the double-screw device, blending with PET, and shearing at high temperature to obtain spinning melt; extruding the spinning melt into a spinning component, circularly blowing in the constant temperature and humidity environment, and cooling to obtain nascent fiber; and carrying out first-grade drafting on the nascent fiber through hot oil at 180-200 DEG C, carrying out second-grade drafting on the nascent fiber through boiling water, thermoforming, washing, drying and winding to obtain the high-tenacity flame-retardant polyester filament. The polyester filament obtained by the preparation method provided by the invention has the tenacity of 9-12CN / dtex and the fiber oxygen index of more than 35.9 and is applied to underground coal mines. The device used by the preparation method provided by the invention is simple, convenient in operation and low in price, and the preparation method provides guarantee for technical revolution of the polyester industry.

Description

technical field [0001] The invention belongs to the field of preparation methods of polyester filaments, in particular to a preparation method of high-strength flame-retardant polyester filaments. Background technique [0002] Polyester fiber is the fiber with the fastest development, the highest output and the largest consumption among all kinds of synthetic fibers, and it is the largest variety of synthetic fibers at present. It has excellent performance and low price, and has played a great role in national defense, industrial fabrics and civilian clothing. Especially in the fiber field, the polyester chips produced by polycondensation are melt-spun to make polyester fibers. This fiber has high breaking strength and elastic modulus, moderate resilience, and excellent light resistance, heat resistance, and corrosion resistance. Therefore, it has developed rapidly since the advent of polyester fiber. [0003] Polyester fiber is a melt-type combustible fiber, and its limit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F1/10C08G63/183C08G63/78D01D1/04D01D5/092D01D5/14D01D10/02
Inventor 余木火陆帅羽张玥张锡明于永山周荣伟杨燕萍唐静文邓雅耿晓宇
Owner DONGHUA UNIV
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