Method for producing polyester industrial yarn by one-step method

A polyester industrial yarn and footwork technology, which is applied in the field of polyester industrial yarn, can solve the problems of high strength, high modulus and low shrinkage rate, the product cannot reach high modulus, and low shrinkage can not be taken into account, and achieve high modulus, low shrinkage, etc. Improve the uniformity of viscosity and improve the effect of dry crystallization

Inactive Publication Date: 2010-03-17
SHANDONG HELON POLYTEX CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the one-step method has the advantages of short process flow, high product quality, good benefit and less equipment footprint, so it is better than the two-step method, but the high-temperature spinning, high-temperature and high-stretching spinning process not only affects the performance of the equipment. Very high requirements, such as spinning speed at least 6000 ~ 7000m/min, and because the stretching heat setting is carried out at a higher speed, the heating time of the tow is short

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0023] Example 1

[0024] Production variety 1: High-strength, high-modulus, low-shrinkage polyester industrial filament 1100dtex 103G:

[0025] Raw material PET chip properties: viscosity 0.60dl / g, terminal carboxyl group content 26.8mol / t

[0026] After continuous solid-phase polymerization, chip properties: viscosity 1.034dl / g terminal carboxyl group content 14.9mol / t water content 19.5ppm

[0027] The thickened PET chips are melted and extruded by a screw extruder. The process of the screw extruder:

[0028] The temperature of the five heating zones of the screw is: Zone 1: 300 Zone 2: 300 Zone 3: 296 Zone 4: 298 Zone: 299

[0029] Screw pressure: 14.8Mpa

[0030] Using one-step spinning, four-roller stretching and shaping process:

[0031] The first roller group: temperature 95℃, speed 2200m / min;

[0032] The second roller group: temperature 180℃, speed 5000m / min;

[0033] The third roller group: temperature 240℃, speed 6250m / min;

[0034] The fourth roller set: the temperature is 145°C,...

Example Embodiment

[0036] Example 2

[0037] Production variety 2: High-strength, high-modulus, low-shrinkage polyester industrial filament 1670dtex 303G:

[0038] Raw material PET chip properties: viscosity 0.65dl / g, terminal carboxyl group content 25.5mol / t

[0039] After continuous solid-phase polymerization, chip properties: viscosity 1.035dl / g terminal carboxyl group content 14.7mol / t water content 19.5ppm

[0040] The thickened PET chips are melted and extruded by a screw extruder. The process of the screw extruder:

[0041] The temperature of the five heating zones of the screw are as follows: Zone 1: 302 Zone 302: Zone 302: Zone 298: Zone 4: 299 Zone: 300

[0042] Screw pressure: 16.0Mpa

[0043] Using one-step spinning, four-roller stretching and shaping process:

[0044] The first roller group: temperature 100℃, speed 2600m / min;

[0045] The second roller set: temperature 185℃, speed 5350m / min;

[0046] The third roller group: temperature 245℃, speed 6550m / min;

[0047] The fourth roller set: the temp...

Example Embodiment

[0049] Example 3

[0050] Production variety 3: High-strength, high-modulus, low-shrinkage polyester industrial filament 1440dtex 202G

[0051] Raw material PET chip properties: viscosity 0.69dl / g, terminal carboxyl group content 21.2mol / t

[0052] After continuous solid-phase polymerization, chip properties: viscosity 1.036dl / g terminal carboxyl group content 14.5mol / t water content 19.2ppm

[0053] The thickened PET chips are melted and extruded by a screw extruder. The process of the screw extruder:

[0054] The temperature of the five heating zones of the screw are: Zone 1: 304 Zone 2: 304 Zone 3: 300 Zone 4: 300 Zone 5: 301

[0055] Screw pressure: 16.2Mpa

[0056] Using one-step spinning, four-roller stretching and shaping process:

[0057] The first roller group: temperature 108℃, speed 3000m / min;

[0058] The second roller group: temperature 195℃, speed 5800m / min;

[0059] The third roller group: temperature 255℃, speed 7050m / min;

[0060] The fourth roller set: the temperature is 155...

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Abstract

The invention discloses a method for producing polyester industrial yarn by a one-step method, comprising a solid-phase polymerization step, a fusing spinning step, a stretching and heat shaping stepand a winding and forming step. The method is characterized in that: in the solid-phase polymerization step, raw materials with the viscosity of 0.65+/-0.05dl/g, the content of terminal carboxyl groupof 24+/-3mol/t are cut into pieces and stuck to be materials with the viscosity of 1.035+/-0.01dl/g, the water content less than or equal to 20ppm and the content of the terminal carboxyl group lessthan or equal to 15mol/t through continuous solid-phase polymerization; in the fusing spinning step, the ratio of the length to the diameter of spinneret orifices of a spinneret plate for spinning is3:1, the deviation ratio of the aperture to the length of the spinneret orifice is +/-0.02, and the spinneret orifices are evenly arrayed in the spinneret plate; in the stretching and heat shaping step, four rollers are adopted for stretching and shaping; and in the winding and forming step, the winding speed is 6,300+/-500m/min. The polyester industrial yarn can simultaneously achieve the performances of high strength, high modulus and low shrinkage, and has breakage strength more than or equal to 8.2CN/dtex, initial modulus more than or equal to 110N/dtex, the modulus more than or equal to 5.0cn/dtex when 5 percent is stretched and dry heat shrinking percentage less than or equal to 4.1 percent.

Description

technical field [0001] The invention relates to the technical field of polyester industrial yarns, in particular to a method for producing polyester industrial yarns in one step. Background technique [0002] As a rubber skeleton material, polyester industrial yarn is widely used in the fields of tires, conveyor belts, high-pressure hoses and building decoration. Among them, the tire cord fabric used for high-grade passenger tires not only requires the cord fabric to have high strength and high modulus to ensure its low loss performance and reduce the heating phenomenon of the tire during use, but also requires it to have good low shrinkage, which is beneficial to the tire. Forming process and avoid tire side dent phenomenon. [0003] At present, industrialized production of high-strength, high-modulus and low-shrinkage industrial filaments mainly includes spinning and drawing one-step method and two-step method. The one-step method is that the raw material slices (PET sli...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D01D5/098D01D5/092D01D1/09
Inventor 周立民王显栋许亚成马英贤苏松涛
Owner SHANDONG HELON POLYTEX CHEM FIBER
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