Production method of super-strength chinlon 66 fiber

A production method and ultra-high-strength technology, applied in the field of spinning, to achieve the effects of reducing crystallization and orientation, uniform and stable viscosity, and accelerating wind speed

Active Publication Date: 2018-08-24
SHEN MA INDUSTRY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using high-strength nylon 66 fiber to produce tires, conveyor belts, lifting belts and other products, it can achieve the purpose of layer reduction, weight reduction and production cost reduction, and can also meet the performance requirements of high-quality tires, conveyor belts and lifting belts, but The breaking strength of nylon 66 industrial yarn produced by existing technology is generally 9.3-9.5g / d. Therefore, it is urgent to find a method for producing ultra-high-strength nylon 66 fiber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of production method of ultra-high-strength nylon 66 fiber, comprises the following steps:

[0027] (1) Polymerization: Nylon 66 salt solution with a concentration of 52% by mass is concentrated and polymerized to obtain a high-viscosity polymerized spinning melt in a molten state, and the relative viscosity of formic acid of the high-viscosity polymerized spinning melt is 80 ;

[0028] (2) Spinning: The high-viscosity polymerized spinning melt is transported to the spinning box through the melt pipeline, quantitatively pressed into the spinning assembly by the metering pump, and then sprayed out from the spinneret to form a tow in the spinning box; Wherein, the temperature of the melt pipeline is 290°C; the temperature of the spinning box is 315°C; the residence time of the high-viscosity polymer spinning melt in the spinning assembly is 2min; the metering pump is a In-one-out type; the number of holes in the spinneret is 160 holes / plate, the hole spacing is 8....

Embodiment 2

[0035] A kind of production method of ultra-high-strength nylon 66 fiber, comprises the following steps:

[0036] (1) Polymerization: Nylon 66 salt solution with a mass percent concentration of 48% is concentrated and polymerized to obtain a high-viscosity polymerized spinning melt in a molten state, and the relative viscosity of formic acid of the high-viscosity polymerized spinning melt is 76 ;

[0037](2) Spinning: The high-viscosity polymerized spinning melt is transported to the spinning box through the melt pipeline, quantitatively pressed into the spinning assembly by the metering pump, and then sprayed out from the spinneret to form a tow in the spinning box; Wherein, the temperature of the melt pipeline is 295°C; the temperature of the spinning box is 325°C; the residence time of the high-viscosity polymer spinning melt in the spinning assembly is 1.5min; the metering pump is One inlet and four outlets; the number of holes in the spinneret is 104 holes / plate, the hol...

Embodiment 3

[0044] A kind of production method of ultra-high-strength nylon 66 fiber, comprises the following steps:

[0045] (1) Polymerization: Nylon 66 salt solution with a concentration of 55% by mass is concentrated and polymerized to obtain a high-viscosity polymerized spinning melt in a molten state, and the relative viscosity of formic acid of the high-viscosity polymerized spinning melt is 85 ;

[0046] (2) Spinning: The high-viscosity polymerized spinning melt is transported to the spinning box through the melt pipeline, quantitatively pressed into the spinning assembly by the metering pump, and then sprayed out from the spinneret to form a tow in the spinning box; Wherein, the temperature of the melt pipeline is 285°C; the temperature of the spinning box is 305°C; the residence time of the high-viscosity polymer spinning melt in the spinning assembly is 2.5min; the spinneret The number of holes is 230 holes / plate, the hole spacing is 7.5mm, the hole diameter is 0.2mm, and the ...

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Abstract

The invention discloses a production method for super-strength chinlon 66 fiber. The production method comprises the main steps of nylon 66 saline solution, concentration polymerization, spinning, cooling, oiling, drafting forming and winding. The production method is simple in technology and easy to implement, batched and continuous production of the super-strength chinlon 66 fiber can be achieved, the production efficiency is high, the yield is large, the performance of product batch pieces is uniform and stable, the breaking strength of the obtained super-strength chinlon 66 fiber reaches 10.0-10.4 g / d, the elongation at break reaches 16-22%, the elongation rate under the constant load reaches 10.5-13.5%, the dry hot shrinkage rate is 4.7-7.7%, the strength retention is larger than 90%,and the method has the advantages of being high in strength, low in unit weight, good in fatigue resistance, impact resistance, friction resistance and heat resistance and the like.

Description

technical field [0001] The invention belongs to the technical field of spinning, and in particular relates to a production method of ultra-high-strength nylon 66 fiber. Background technique [0002] The scientific name of nylon is polyamide fiber, which is the general name of polyamide fibers produced in China. It is called nylon internationally. It has the characteristics of high strength, wear resistance and good resilience. The wear resistance is 10 times that of cotton fiber. 10 times that of dry viscose fiber and 140 times that of wet fiber. The main varieties of nylon are nylon 6 and nylon 66. Their physical properties are similar, and they have good moth resistance and corrosion resistance. They can be purely spun or blended for various clothing and knitwear. A better variety, clothing made of nylon is more comfortable to wear than polyester clothing. Nylon 66 medium and low denier industrial yarn has the advantages of high strength, light weight, fatigue resistance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/08D01D5/088D01D5/096D01D5/16D01D1/00D01F6/80D02J13/00
CPCD01D1/00D01D5/08D01D5/088D01D5/096D01D5/16D01F6/80D02J13/00
Inventor 张鲁亚李新常梅英王安乐吕文娟李鹏翔侯彦波谢巧丽赵二伟王金林张超薛山单炳全李连臣袁晓明石华寇万宏
Owner SHEN MA INDUSTRY CO LTD
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