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Manufacturing method for high-strength low-elongation type dacron industrial yarn

A technology of polyester industrial yarn and manufacturing method, which is applied in the field of manufacturing, can solve the problems of high linear density unevenness of fibers, high linear density unevenness of polyester industrial yarn, and unsatisfactory cooling process, etc., and achieve low linear density deviation rate, Eases turbulent airflow and reduces the effect of solidification point downshift

Active Publication Date: 2012-11-21
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Existing research shows that the cooling process is not ideal in the current preparation process of high-strength and low-elongation polyester industrial yarn
Chinese patent CN 101824664A describes a method for manufacturing high-strength polyester yarn, which adopts ring blowing cooling, and the linear density unevenness of the obtained polyester industrial yarn is relatively high
Patent CN 03113412.2 introduces a manufacturing method of high-strength and low-stretch polyester filaments for sewing threads. The cooling step is after drawing and heat setting, and the instability of the solidification point causes the tow to vibrate, resulting in high fiber linear density unevenness.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method for manufacturing high-strength and low-elongation polyester industrial yarn, the process flow of which is high-viscosity molten polyester raw material—measurement—spraying—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 1.2dl / 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 180° C., and the temperature of the tow at the outlet of the pre-cooling zone is 260° C.; the pre-cooling height is 30 mm.

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

Embodiment 2

[0046] A method for manufacturing high-strength and low-elongation polyester industrial yarn, the process flow of which is high-viscosity molten polyester raw material—measurement—spraying—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 1.2dl / 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 265° C.; the pre-cooling height is 80 mm. The said pre-cooling is active outer ring pre-cooling; said active outer ring pre...

Embodiment 3

[0056] A method for manufacturing high-strength and low-elongation polyester industrial yarn, the process flow of which is high-viscosity molten polyester raw material—measurement—spraying—cooling—oiling—stretching—heat setting—winding forming, in:

[0057] The high-viscosity molten polyester raw material refers to high-viscosity slices with an intrinsic viscosity of 1.0 dl / 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 270°C, the temperature of the tow at the exit of the slow cooling zone is 282°C, and the slow cooling height is 260mm.

[0060] The pre-cooling refers to that the ambient temperature of the tow is 200° C., and the temperature of the tow at the outlet of the pre-cooling zone is 263° C.; the pre-cooling height is 40 mm. The said pre-cooling is active outer ring pre-cooling; said active outer ring pr...

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Abstract

The invention relates to a manufacturing method for high-strength low-elongation type dacron industrial yarn. The manufacturing method comprises compress flows of hyper-viscous melting of a dacron raw material, metering, yarn spraying, cooling, oiling, drawing, heat setting and winding forming. An adopted dacron slice is a hyper-viscous slice obtained by solid phase tackifying. A cooling device sequentially comprises slow cooling, pre-cooling, windless region cooling and air-blowing cooling, wherein the pre-cooling is initiative outer ring pre-cooling and refers to enabling hot air to be conveyed and flow through an initiative outer ring device so as to cool yarn strips. The initiative outer ring device is a hollow annular belt, the air passing area ratio of the initiative outer ring device is 20-50%, and the height is 30-80mm. The temperature of the hot air is 60-80 DEG C, the humidity is 60-80%, and the conveying speed is 0.2-0.8m / s. The obtained dacron filament has the advantages of being high in breaking strength, low in breaking elongation and linear density deviation rate and reasonable in dry heat shrinkage rate, and can meet the application requirements well.

Description

technical field [0001] The invention relates to a production method of polyester industrial yarn, in particular to a production method of high-strength and low-elongation polyester industrial yarn, which belongs to the field of dry 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] High-strength and low-...

Claims

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Application Information

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IPC IPC(8): D01D5/088D01D5/092D01D5/08D01D13/00
Inventor 汤方明李文刚王丽丽王山水尹立新杨大矛孙晓华
Owner JIANGSU HENGLI CHEM FIBER
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