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Manufacturing method for super high-strength PET industrial yam

A technology of polyester industrial yarn and manufacturing method, which is applied in textile and papermaking, filament/thread forming, fiber processing, etc., can solve the problems of high crystallinity of primary fibers, influence of spinning forming, and intensified tow jitter, etc. Low density deviation, reasonable dry heat shrinkage, and narrow molecular weight distribution

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

However, with the addition of the slow cooling device and the windless zone, the blowing position of the side blowing moves down, and the solidification point of the nascent fiber moves down, which intensifies the jitter of the tow, resulting in unstable air flow and aggravated the jitter of the tow. It makes the melt unstable after exiting the spinneret, and the spinning shape is affected to a certain extent. At the same time, the primary fiber stays for a long time near the crystallization area, which leads to excessive crystallization of the primary fiber, which will lead to wool and broken ends during production. yield drop

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method for manufacturing ultra-high-strength polyester industrial yarn, the technological process of which is high-viscosity molten polyester raw material—measurement—spraying—cooling—oiling—stretching—heat setting—winding forming, wherein: The high-viscosity molten polyester raw material refers to PET high-viscosity chips with an intrinsic viscosity of 1.0 dl / g.

[0037] The cooling includes four parts of slow cooling, pre-cooling, cooling in the windless zone and blowing cooling in turn;

[0038] 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.

[0039] The pre-cooling refers to that the ambient temperature of the tow is 170° 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.

[0040] The cooling in the windless zone means that the ambient temperature of the tow...

Embodiment 2

[0045] A method for manufacturing ultra-high-strength polyester industrial yarn, the process flow is high-viscosity molten polyester raw material - metering - spinning - cooling - oiling - stretching - heat setting - winding forming, the High-viscosity molten polyester raw materials refer to high-viscosity chips with an intrinsic viscosity of 1.1dl / g. in:

[0046] The cooling includes four parts of slow cooling, pre-cooling, cooling in the windless zone and blowing cooling in turn;

[0047] 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.

[0048] 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.

[0049] The cooling in the windless zone means that the ambient temperature of the tow is 160° C., and...

Embodiment 3

[0054] A method for manufacturing ultra-high-strength polyester industrial yarn, the process flow of which is high-viscosity molten polyester raw material—measurement—spraying—cooling—oiling—stretching—heat setting—winding forming, described The high-viscosity molten polyester raw material refers to high-viscosity chips with an intrinsic viscosity of 1.2dl / g. in:

[0055] The cooling includes four parts of slow cooling, pre-cooling, cooling in the windless zone and blowing cooling in turn;

[0056] 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 282°C, and the slow cooling height is 280mm.

[0057] 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 255° C.; the pre-cooling height is 80 mm.

[0058] The cooling in the windless zone means that the ambient temperature of the tow is 150°...

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Abstract

The invention relates to a manufacturing method for super high-strength PET industrial yam, wherein the technological process for manufacture is as follows: hyperviscous smelting of polyester raw materials, metering, extruding, cooling, oil applying, stretching, heat setting and reeled forming; the cooling sequentially comprises four parts including slow cooling, precooling, calm zone cooling and blow cooling. The precooling refers to initiative outer ring stepped precooling, the initiative outer ring stepped precooling refers to that hot air is transferred and flow through the initiative outer ring stepped device for cooling filaments, the initiative outer ring stepped device is a hollow stepped ring-shaped belt which comprises two parts including an upper part and a lower part; and the hole density of the upper and the lower parts are the same, but the pore diameters are unequal. The temperature of embryo fibre on the spinning line can be adjusted through the technology of cooling conditions, the orientation and the crystallization of embryo fiber are reduced, the obtained linear density deviation ratio is smaller or equal to 1.5 percent, and the fracture strength is more than or equal to 8.8 cN / detex.

Description

technical field [0001] The invention relates to a production method of polyester industrial yarn, in particular to a production method of super high-strength 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] Ultra-high-strength polyester indus...

Claims

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Application Information

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