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Method for improving strength of polyphenylene terephthalamide fibers through heat setting

A technology of poly-p-phenylene terephthalamide and p-phenylene phthalamide, which is applied in the direction of dry cleaning fiber products, textiles and paper making, liquid/gas/vapor removal with squeeze rollers, etc.

Inactive Publication Date: 2010-07-14
YANTAI TAYHO ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing poly-p-phenylene terephthalamide fiber still has a large room for improvement in terms of strength and modulus, and the poly-p-phenylene terephthalamide fiber will continue to develop towards ultra-high strength, Development in the direction of ultra-high modulus and low density

Method used

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  • Method for improving strength of polyphenylene terephthalamide fibers through heat setting
  • Method for improving strength of polyphenylene terephthalamide fibers through heat setting

Examples

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Embodiment 1

[0013] The method for improving poly-p-phenylene terephthalamide fiber strength by heat setting of the present invention comprises the steps:

[0014] (A) Poly-p-phenylene terephthalamide fiber tow is washed, and then the poly-p-phenylene terephthalamide fiber tow is squeezed and dehydrated by a water squeezing device. The percentage by weight of moisture in the terephthalamide fiber tow is controlled at 40% or 45% or 48% or 50% or 52% or 55% or 60%, or between 40% and 60% other values;

[0015] (B) The poly-p-phenylene terephthalamide fiber tow obtained in step (A) is dried, stretched and drawn by a drying roll, and the temperature of the drying roll is 150°C or 160°C or 180°C or 200°C or 210°C or 220°C or 240°C or 260°C or 270°C or 280°C or 300°C, the temperature of the drying roller can also be other values ​​between 150 and 300°C, and let the polyparaphenylene terephthalamide The fiber tow passes through the drying oven in the state of being stretched and drawn. The tens...

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Abstract

A method for improving strength of polyphenylene terephthalamide fibers through heat setting comprises the following steps: squeezing the polyphenylene terephthalamide fiber tows for dehydration by using a wringing device and controlling the weight percent of the moisture in the fiber tows between 40% and 60% during squeezing for dehydration; and then drying the fiber tows with drying rolls and drawing the fiber tows, and allowing the fiber tows to pass through a drying oven under the state of being drawn, wherein the time for the fiber tows to pass through the drying oven is 20-40s, the temperature in the drying oven is 200-300 DEG C, the temperature of the drying rolls is 150-300 DEG C and the drawing tension is 1500-2500cN. The method can substantially improve the tensile strength and the modulus of the treated fibers.

Description

technical field [0001] The invention relates to a method for improving various properties of polyparaphenylene terephthalamide fibers by thermal stretching. Background technique [0002] Polyparaphenylene terephthalamide fibers can be used as mooring ropes for ships and balloons, traction ropes for fishing gear and resource collection, yacht canvas, gliding recovery spaceships, bulletproof suit vests and horse racing suits and other protective clothing. It can also be used as a reinforcing fiber for composite materials, such as tire cords and belt cords, as well as aircraft, automobiles, sporting goods, etc. However, the existing poly-p-phenylene terephthalamide fiber still has a large room for improvement in terms of strength and modulus, and the poly-p-phenylene terephthalamide fiber will continue to develop towards ultra-high strength, Development in the direction of ultra-high modulus and low density. Contents of the invention [0003] The purpose of the present inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D02J1/22D02J13/00D06L1/12D06B15/02
Inventor 唐凯马千里季先恒
Owner YANTAI TAYHO ADVANCED MATERIALS CO LTD
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