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A kind of filament and its preparation method

A filament and polyamide technology, applied in the fiber field, can solve problems such as poor moisture absorption, difficulty in dyeing polyester filaments, disrupting the molecular weight regularity of polyester, etc., achieve good dyeability, save equipment investment costs, and reduce greenhouse effect of effect

Active Publication Date: 2021-09-07
CATHAY R&D CENT CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the defects such as difficult dyeing and poor moisture absorption of polyester filaments, the present invention selects polyamide resins with similar melting point and crystallization temperature to polyester for blending and spinning, which disrupts the regularity of polyester molecular weight and increases the density of amorphous regions. Ratio, increase the moisture absorption performance of the fiber, and realize the dyeing purpose of disperse dyes under normal pressure conditions

Method used

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  • A kind of filament and its preparation method
  • A kind of filament and its preparation method
  • A kind of filament and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094]1. Preparation of mixed melt

[0095] The polyamide 56 melt and the polyethylene terephthalate melt are sent to the static mixer through their respective melt pipes and mixed evenly to obtain a mixed melt; wherein, the control of the polyamide 56 melt and the polyethylene terephthalate The mass ratio of ethylene glycol diformate melt is 5:95.

[0096] Among them, the preparation method of polyamide 56 melt is: under nitrogen condition, 1,5-pentanediamine, adipic acid and water are uniformly mixed to prepare polyamide 56 salt solution, wherein, the control of 1,5- The molar ratio of pentamethylenediamine to adipic acid is 1.08:1;

[0097] Heat the above-mentioned polyamide 56 salt solution, the pressure in the reaction system rises to 2.0Mpa, exhaust, maintain the pressure, and then reduce the pressure to reduce the pressure in the reaction system to 0.2MPa, vacuumize to -0.07Mpa to obtain a polyamide 56 melt; wherein, the temperature of the reaction system was 270°C at...

Embodiment 2

[0109] 1. Preparation of mixed melt

[0110] The polyamide 56 resin and the polybutylene terephthalate resin are dried respectively, and the dried polyamide 56 resin and the dried polybutylene terephthalate resin are in a mass ratio of 8:92 Mix evenly to obtain a blended resin; wherein, the relative viscosity of the polyamide 56 resin is 3.3, the intrinsic viscosity of the polybutylene terephthalate resin is 1.1dL / g, and the moisture content of the polyamide 56 resin after drying is 180 ppm, and the moisture content of the polybutylene terephthalate resin after drying was 80 ppm.

[0111] The above-mentioned blended resin is heated to a molten state in a screw extruder to form a mixed melt; wherein, the screw extruder is heated in five zones, the temperature of the first zone is 248°C, the temperature of the second zone is 280°C, and the temperature of the third zone is 288°C, the temperature in the fourth zone is 302°C, and the temperature in the fifth zone is 295°C.

[011...

Embodiment 3

[0122] 1. Preparation of mixed melt

[0123] The polyamide 56 resin and the polyethylene terephthalate resin are dried respectively, and the dried polyamide 56 resin and the dried polyethylene terephthalate resin are in a mass ratio of 10:90 Mix evenly to obtain a blended resin; wherein, the relative viscosity of the polyamide 56 resin is 3.5, the intrinsic viscosity of the polyethylene terephthalate resin is 1.3dL / g, and the moisture content of the polyamide 56 resin after drying is 260ppm, and the moisture content of the polyethylene terephthalate resin after drying was 50ppm.

[0124] The above-mentioned blended resin is heated to a molten state in a screw extruder to form a mixed melt; wherein, the screw extruder is heated in five zones, the temperature of the first zone is 244°C, the temperature of the second zone is 282°C, and the temperature of the third zone is 292°C, the temperature in the fourth zone is 302°C, and the temperature in the fifth zone is 298°C.

[0125...

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Abstract

The invention provides a filament and a preparation method thereof. Long filament of the present invention, comprise the polyester of 85-98 weight part and the polyamide of 2-15 weight part, described polyester is selected from polyethylene terephthalate, polytrimethylene terephthalate, polyethylene At least one of butylene terephthalate and modified polyethylene terephthalate, the polyamide is selected from at least one of polyamide 6, polyamide 5X and polyamide 6X; wherein , the intrinsic viscosity of the polyester is 0.9-1.5dL / g, and the relative viscosity of the polyamide is 3.2-4.0. The preparation method of the filament comprises: 1) making the polyester and the polyamide into a mixed melt; 2) making the mixed melt into as-spun filaments; 3) cooling the as-spun filaments, oiling, stretching, heat setting, and coiling to obtain the filament. The filament of the invention has high strength, good hygroscopicity, wear resistance and dyeability.

Description

technical field [0001] The invention belongs to the field of fiber technology, and in particular relates to a filament and a preparation method thereof. Background technique [0002] Polyester filament has the advantages of high strength, high modulus, solvent resistance, heat resistance, fatigue resistance, etc., and is widely used in civil and industrial materials. However, due to the tight arrangement of polyester macromolecular chains, high crystallinity and orientation, and the lack of polar groups on the molecular chains, the filaments prepared from it have poor hygroscopicity and dyeability, are prone to static electricity, and are prone to pilling. , poor wear resistance and other defects; in addition, polyester filaments are generally dyed with disperse dyes, and they need to be colored under high temperature and high pressure conditions, which is not only dangerous to operate, but also requires high dyeing equipment and wastes energy. [0003] In order to overcome...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/14D01F8/12D01F1/10C08G69/26C08G69/28D06P1/16D06P3/54D01D5/08D01D5/28D01D5/088D01D5/12D01D10/02
Inventor 孙朝续徐晓辰秦兵兵刘修才
Owner CATHAY R&D CENT CO LTD
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