Manufacturing method for superlow shrinkage type PET industrial yarn

A technology of polyester industrial yarn and manufacturing method, which is applied in the field of polyester industrial yarn manufacturing, can solve the problems of no improvement in the cooling process of the manufacturing process, high viscosity requirements for raw material slices, and complicated heat setting process, etc., and achieve reasonable dry heat shrinkage and linear density. Low deviation rate, reduced effect of orientation and crystallization

Active Publication Date: 2012-11-28
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The dry heat shrinkage rate of traditional ultra-low shrinkage polyester industrial yarn is about 2% (170°C, 1min, 0.05g / D), and it is prone to uneven shrinkage and unevenness.
In the existing technology, the manufacturing process of ultra-low shrinkage polyester industrial yarn described in Chinese patent CN 1904153A, although the ultra-low shrinkage performance of this fiber is good, the viscosity of the raw material slices is high, and the heat setting process is relatively complicated.
The ultra-low shrinkage polyester industrial yarn described in the patent CN 101307513B is made by adding inorganic powder to the raw material without improving the cooling process in the manufacturing process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method for manufacturing ultra-low shrinkage polyester industrial yarn, the process flow of which is high-viscosity molten polyester raw material - metering - spinning - cooling - oiling - stretching - heat setting - winding forming, in:

[0037] The high-viscosity molten polyester raw material refers to PET high-viscosity chips with an intrinsic viscosity of 1.1 dl / g.

[0038] The cooling includes four parts of slow cooling, pre-cooling, cooling in the windless zone and blowing cooling in turn;

[0039] The slow cooling refers to that the ambient temperature of the tow is 260°C, the temperature of the tow at the exit of the slow cooling zone is 280°C, and the slow cooling height is 250mm.

[0040] The pre-cooling refers to that the ambient temperature of the tow is 160° C., and the temperature of the tow at the outlet of the pre-cooling zone is 250° C.; the pre-cooling height is 40 mm.

[0041] The cooling in the windless zone means that the ambient temperature of ...

Embodiment 2

[0046] A method for manufacturing ultra-low shrinkage polyester industrial yarn, the process flow of which is high-viscosity molten polyester raw material - metering - spinning - cooling - oiling - stretching - heat setting - winding forming, in:

[0047] The high-viscosity molten polyester raw material refers to high-viscosity slices with an intrinsic viscosity of 1.09dl / g.

[0048] The cooling includes four parts of slow cooling, pre-cooling, cooling in the windless zone and blowing cooling in turn;

[0049] The slow cooling refers to that the ambient temperature of the tow is 300°C, the temperature of the tow at the exit of the slow cooling zone is 285°C, and the slow cooling height is 300mm.

[0050] The pre-cooling refers to that the ambient temperature of the tow is 260° C., and the temperature of the tow at the outlet of the pre-cooling zone is 260° C.; the pre-cooling height is 80 mm.

[0051] The cooling in the windless zone means that the ambient temperature of the...

Embodiment 3

[0056] A method for manufacturing ultra-low shrinkage polyester industrial yarn, the process flow of which is high-viscosity molten polyester raw material - metering - spinning - cooling - oiling - stretching - heat setting - winding forming, in:

[0057] The high-viscosity molten polyester raw material refers to high-viscosity chips with an intrinsic viscosity of 1.02dl / g.

[0058] The cooling includes four parts of slow cooling, pre-cooling, cooling in the windless zone and blowing cooling in turn;

[0059] The slow cooling refers to that the ambient temperature of the tow is 280°C, the temperature of the tow at the exit of the slow cooling zone is 283°C, and the slow cooling height is 285mm.

[0060] The pre-cooling refers to that the ambient temperature of the tow is 210° C., and the temperature of the tow at the outlet of the pre-cooling zone is 255° C.; the pre-cooling height is 60 mm.

[0061] The cooling in the windless zone means that the ambient temperature of the ...

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Abstract

The invention relates to a manufacturing method for superlow shrinkage type PET industrial yarn, which is characterized in that the superlow shrinkage type PET industrial yarn is manufactured through selecting and controlling cooling conditions, and the technological process is as follows: hyperviscous melting to polyester raw materials, metering, spanning, cooling, oil supplying, stretching, hot shaping, and reeled forming. For lowing the irregularity and shrinkage percentage of fiber, a slow cooling device is arranged in the production of industrial yarn, a precooling device adopted is a hollow stepped ring-shaped belt comprising an upper part and a lower part, through holes with the diameters of 5 to 7 mm are uniformly distributed in the upper part of the ring-shaped belt, through holes with the diameters of 3 to 4 mm are uniformly distributed in the lower part, and the hole arrangement densities are the same. The natural target of the PET industrial yarn is as follows: the fracture strength is equal or greater than 7.0 cN/dtex, the breaking elongation is 20.0 plus or minus 1.5 percent, and the dry heat shrinkage percentage under the test conditions of 170 DEGC, 0.05cN/dtex reaches 1.9 plus or minus 0.25 percent.

Description

technical field [0001] The invention relates to a production method of polyester industrial yarn, in particular to a production method of ultra-low shrinkage polyester industrial yarn, belonging to the field of polyester industrial yarn manufacturing. Background technique [0002] Since the advent of polyester, it has achieved great development in industrial use. Polyester industrial yarn refers to high-strength, coarse denier polyester industrial filament. Polyester industrial yarn is widely used in industry because of its excellent physical and mechanical properties such as high breaking strength, high initial modulus, low elongation, and good impact resistance. It can be used as rubber for tire cords, cable covers, conveyor belts, etc. It can also be used as the skeleton material of plastic-coated fabrics, and can also be used as ropes, vehicle safety belts, conveyor belts, tarpaulins, coated fabrics, geotextiles, etc. [0003] Polyester industrial yarn is widely used in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/088D01D5/092D01D5/08D01D13/00
Inventor 王丽丽李文刚汤方明王山水尹立新杨大矛王辉
Owner JIANGSU HENGLI CHEM FIBER
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