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Sheath-core flame retardant filament and preparation method thereof

A skin-core and filament technology, applied in the field of fibers, can solve the problems of poor flame retardancy and slow natural degradation rate of polyester-nylon composite filaments, and achieve the effects of enhancing offensive ability, improving degradation rate and increasing specific surface area.

Active Publication Date: 2019-05-07
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects of poor flame retardancy and slow natural degradation rate of the polyester nylon composite filament in the prior art, and provide a polyester nylon composite filament with good flame retardancy and fast natural degradation rate and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A preparation method of a skin-core flame-retardant filament, the steps of which are as follows:

[0043] (1) prepare MgO powder;

[0044] First heat MgO to 400°C and keep it warm for 2 hours, then raise the temperature to 700°C and keep it warm for 1 hour, then cool it in the air, and finally pulverize it to obtain MgO powder with an average particle size of 0.49 microns;

[0045] (2) prepare polyester;

[0046] (2.1) Esterification reaction;

[0047] Make slurry with terephthalic acid, ethylene glycol and 2-carboxyethylphenylphosphinic acid at a molar ratio of 1:1.2:0.03, add MgO powder, antimony trioxide, titanium dioxide and trimethyl phosphate and mix well Finally, the esterification reaction is carried out under pressure in a nitrogen atmosphere. The pressurized pressure is 0.3 MPa, and the temperature of the esterification reaction is 250 ° C. When the amount of water distilled in the esterification reaction reaches 90.1% of the theoretical value, it is an este...

Embodiment 2

[0056] A preparation method of a skin-core flame-retardant filament, the steps of which are as follows:

[0057] (1) prepare BaO powder;

[0058] First heat BaO to 400°C and keep it warm for 3 hours, then raise the temperature to 700°C and keep it warm for 2 hours, then cool it in the air, and finally pulverize it to obtain BaO powder with an average particle size of 0.45 microns;

[0059] (2) prepare polyester;

[0060] (2.1) Esterification reaction;

[0061] Make slurry with terephthalic acid, ethylene glycol and 2-carboxyethylphenylphosphorous acid at a molar ratio of 1:2.0:0.032, add BaO powder, antimony ethylene glycol, titanium dioxide and triphenyl phosphate and mix well Finally, the esterification reaction is carried out under pressure in a nitrogen atmosphere. The pressurized pressure is 0.2 MPa, and the temperature of the esterification reaction is 260 ° C. When the amount of water distilled in the esterification reaction reaches 95% of the theoretical value, it is...

Embodiment 3

[0068] A preparation method of a skin-core flame-retardant filament, the steps of which are as follows:

[0069] (1) Preparation of SiO 2 - BaO powder;

[0070] First heat the SiO 2 -BaO is kept at 400°C for 2.5 hours, then heated to 700°C, held for 1.5 hours, cooled in air, and finally crushed to obtain SiO with an average particle size of 0.48 microns 2 - BaO powder, SiO 2 -The content of BaO in BaO is 40wt%;

[0071] (2) prepare polyester;

[0072] (2.1) Esterification reaction;

[0073] Make a slurry of terephthalic acid, ethylene glycol and 2-carboxyethylphenylphosphorous acid at a molar ratio of 1:1.6:0.035, and add SiO 2 -After BaO powder, antimony acetate, titanium dioxide and trimethyl phosphite are mixed evenly, the esterification reaction is carried out under normal pressure in a nitrogen atmosphere. The temperature of the esterification reaction is 255 ° C. When the water in the esterification reaction is distilled When the amount reaches 92% of the theoreti...

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Abstract

The invention relates to a sheath-core flame retardant filament and a preparation method thereof. The preparation method comprises the steps that the sheath-core flame retardant filament is prepared from chinlon and polyester according to an FDY process by means of a sheath-core composite spinning method; both chinlon and polyester contain fire retardant and solid base catalyst powder subjected tohigh-temperature calcining, the high-temperature calcining temperature is 400-700 DEG C, and the solid base catalyst is one or more of MgO, BaO and SiO2-BaO. The limit oxygen index of the prepared product is 28-30; after the product is placed for 60 months on the condition that the temperature is 25 DEG C, and the relative humidity is 65%, the cortical characteristic viscosity is lowered by 13-18%, and the core layer viscosity is lowered by 10-16%. The preparation method is low in cost and simple in process; the prepared product is excellent in flame retardant property and high in natural degradation rate, and has great application prospects.

Description

technical field [0001] The invention belongs to the field of fiber technology, and relates to a skin-core flame-retardant filament and a preparation method thereof. Background technique [0002] Polyester-nylon composite filament is a fiber with a sheath-core structure with polyester as the core and nylon as the cortex. The nylon in the cortex has good dyeing performance, which can overcome the defect that polyester is difficult to dye due to the tight accumulation of molecular chains. In addition, the initial modulus of nylon is low, which endows a soft hand feeling; the cost of polyester in the core layer is low, making the composite The cost of the fiber is far lower than that of a single-component nylon filament, and the two components perfectly combine their excellent properties through composite spinning. However, the limiting oxygen index (LOI) of polyester is 21. Nylon has not been flame-retardantly modified, and its flame-retardant grade is low. Vertical combustion...

Claims

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Application Information

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IPC IPC(8): D01F8/12D01F8/14D01F1/07C08G63/183C08G63/86
Inventor 范红卫汤方明王山水
Owner JIANGSU HENGLI CHEM FIBER
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