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A method for manufacturing high-strength safety belt polyester industrial yarn

A technology of polyester industrial yarn and manufacturing method, which is applied in the field of polyester industrial yarn manufacturing, can solve problems such as high crystallinity of primary fibers, intensified tow jitter, and influence on spinning forming, and achieve high breaking strength, low linear density deviation rate, Reasonable heat shrinkage effect

Active Publication Date: 2014-10-01
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
[0005] In the existing technology, such as Chinese patents CN200710134080.X and CN 101824664A respectively adopt the spinning and drawing one-step process and the method of adding a new type of expansion agent to obtain higher strength, but neither considers the cooling process to obtain the thread High-strength safety belt polyester industrial yarn with low density deviation

Method used

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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 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 PET high-viscosity chips with an intrinsic viscosity of 1.0dl / g. in:

[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 exit 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 the tow is 10...

Embodiment 2

[0046] 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:

[0047] The cooling includes four parts of slow cooling, pre-cooling, cooling in the windless zone and blowing cooling in turn;

[0048] 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.

[0049] 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.

[0050] The cooling in the windless zone means that the ambient temperature of the tow is 160°...

Embodiment 3

[0055] 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 1.1dl / g. in:

[0056] The cooling includes four parts of slow cooling, pre-cooling, cooling in the windless zone and blowing cooling in turn;

[0057] 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 260mm.

[0058] 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 60 mm.

[0059] The cooling in the windless zone means that the ambient temperature of the tow is 140°...

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Abstract

The invention relates to a manufacturing method of a high-strength safety belt polyester industrial yarn. The manufacturing method comprises the processes of preparation of a highly viscous melt polyester raw material, metering, spinning, cooling, oil applying, drawing, heat shaping and winding formation; the cooling comprises slow cooling, precooling, cooling in an air free zone and air blast cooling in sequence; the precooling is driving outer ring step precooling, which is carried out in the step of conveying hot air to flow through a driving outer ring step device so as to cool a yarn strip; the driving outer ring step device is a hollow-out step annular strip; the hollow-out step annular strip is divided into an upper part and a lower; and holes of the upper part and the lower part are distributed with different densities and have same apertures. Through the adoption of a process under a cooling condition, the temperature of an as-spun fiber in a spinning line is adjusted and orientation and crystallization of the as-spun fiber are reduced, so that the high strength safety belt polyester industrial yarn with linear density deviation of no more than 1.5% and breaking tenacity of no less than 8.1 cN / dtex is obtained.

Description

technical field [0001] The invention relates to a production method of polyester industrial yarn, in particular to a production method of high-strength safety belt 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] High-strength safety belt polyester i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/088
Inventor 汤方明李文刚王丽丽王山水尹立新杨大矛杨超明
Owner JIANGSU HENGLI CHEM FIBER