High-viscosity polyamide 56 resin, high-strength polyamide 56 industrial yarn and preparation method and application thereof

A high-viscosity polyamide and polyamide technology, applied in the field of polyamide materials, can solve the problems of high winding speed, poor dimensional stability, low fiber crystallization and orientation, etc.

Active Publication Date: 2020-07-07
CATHAY R&D CENT CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-speed winding and low-power drafting technology is adopted, the winding speed is greater than 4000m / min, the drafting ratio is less than 3.0, the winding speed is high, and the time spent on different hot rollers during the fiber drafting process is relatively shortened, that is, the high-temperature setting time of the fiber is shortened Shorter, followed by low-magnification stretching process, resulting in low fiber crystallization and orientation, low breaking strength and poor dimensional stability of the prepared fiber

Method used

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  • High-viscosity polyamide 56 resin, high-strength polyamide 56 industrial yarn and preparation method and application thereof
  • High-viscosity polyamide 56 resin, high-strength polyamide 56 industrial yarn and preparation method and application thereof
  • High-viscosity polyamide 56 resin, high-strength polyamide 56 industrial yarn and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0122] Embodiment one (preparation of high viscosity polyamide 56 resin):

[0123] (1) The low-viscosity polyamide 56 resin with a relative viscosity of 2.65 is dried at a high temperature to obtain a tackified polyamide 56 resin;

[0124] (2) performing resin humidity conditioning treatment on the tackified polyamide 56 resin obtained in step (1), to obtain the high-viscosity polyamide 56 resin;

[0125] The high-temperature drying treatment adopts vacuum protection, and the vacuum degree during the vacuum pumping is -0.06Mpa; the temperature of the high-temperature drying treatment is 150°C; the time of the high-temperature drying treatment is 20h; the high-temperature drying treatment The equipment for processing is a vacuum drum dryer; the relative viscosity of the tackified polyamide 56 resin is 3.5, and the moisture content is 55ppm; the moisture content of the high-viscosity polyamide 56 resin after the resin humidity control treatment is 500ppm; The temperature of the...

Embodiment 2

[0127] Embodiment two (preparation of high viscosity polyamide 56 resin):

[0128] (1) The low-viscosity polyamide 56 resin with a relative viscosity of 2.5 is dried at a high temperature to obtain a tackified polyamide 56 resin;

[0129] (2) performing resin humidity conditioning treatment on the tackified polyamide 56 resin obtained in step (1), to obtain the high-viscosity polyamide 56 resin;

[0130] The high-temperature drying treatment adopts vacuum protection, and the vacuum degree during the vacuum pumping is -0.08Mpa; the temperature of the high-temperature drying treatment is 160°C; the time of the high-temperature drying treatment is 15h; the high-temperature drying treatment The equipment for processing is a vacuum drum dryer; the relative viscosity of the tackified polyamide 56 resin is 3.45, and the moisture content is 60ppm; the moisture content of the high-viscosity polyamide 56 resin after the resin humidity control treatment is 450ppm; The temperature of the...

Embodiment 3

[0132] Embodiment three (preparation of high viscosity polyamide 56 resin):

[0133] (1) The low-viscosity polyamide 56 resin with a relative viscosity of 2.6 is dried at a high temperature to obtain a tackified polyamide 56 resin;

[0134] (2) performing resin humidity conditioning treatment on the tackified polyamide 56 resin obtained in step (1), to obtain the high-viscosity polyamide 56 resin;

[0135] The high-temperature drying treatment adopts vacuum protection, and the vacuum degree during the vacuuming is -0.07Mpa; the temperature of the high-temperature drying treatment is 180°C; the time of the high-temperature drying treatment is 13h; the high-temperature drying treatment The equipment for processing is a vacuum drum dryer; the relative viscosity of the tackified polyamide 56 resin is 3.6, and the moisture content is 30ppm; the moisture content of the high-viscosity polyamide 56 resin after the resin humidity control treatment is 350ppm; The temperature of the res...

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Abstract

The invention provides a high-viscosity polyamide 56 resin, a high-strength polyamide 56 industrial yarn, and a preparation method and application thereof. The preparation method of the high-strengthpolyamide 56 industrial yarn comprises the following steps of heating and melting high-viscosity polyamide 56 resin by adopting a single-screw or double-screw extruder, drawing in a spinning box to obtain a primary yarn, and then carrying out heat preservation, cooling, oiling, pre-interlacing, multi-stage stretching, tension setting, relaxation setting, main interlacing and winding on the primaryyarn to obtain the high-strength polyamide 56 industrial yarn. The high-strength polyamide 56 industrial yarn provided by the invention has good mechanical properties and heat and humidity resistance, and can be applied to the fields of sewing threads, tire cords, airbag yarns, release cloth, water cloth, canvas, safety belts, ropes, fishing nets, industrial filter cloth, conveyor belts, parachutes, tents and bags.

Description

technical field [0001] The invention belongs to the technical field of polyamide materials, and relates to a high-viscosity polyamide 56 resin, a high-strength polyamide 56 industrial yarn and a preparation method and application thereof. Background technique [0002] Polyester and nylon industrial yarns have the characteristics of high strength, low elongation, good dimensional stability, fatigue resistance and aging resistance, making them widely used in tire cords, canvas, conveyor belts, airbags, parachutes, ropes, safety belts , industrial filter cloth or tents and other fields. [0003] There are two production processes of industrial yarn: one is the direct spinning method of the melt, and the other is the indirect spinning method of the slice solid phase thickening. Polyamide 66 and polyethylene terephthalate have been partly spun directly from the melt. Because polyamide 6 contains 8-10wt% monomers in the polymer, it needs to go through a process of removing monome...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/28C08G69/26C08G69/46D01F6/60
CPCC08G69/28C08G69/26C08G69/46D01F6/60Y02P70/62
Inventor 孙朝续陈万钟刘修才
Owner CATHAY R&D CENT CO LTD
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