Polyamide 5X high-strength fiber and preparation method thereof

A polyamide, high-strength technology, applied in the field of polyamide materials, can solve the problems of increased operation steps and costs, and decreased mechanical properties of fibers

Active Publication Date: 2017-06-20
CATHAY R&D CENT CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of flame retardants will cause a decrease in the mechanical properties of the fiber, and at the same time increase the operation steps and costs

Method used

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  • Polyamide 5X high-strength fiber and preparation method thereof
  • Polyamide 5X high-strength fiber and preparation method thereof
  • Polyamide 5X high-strength fiber and preparation method thereof

Examples

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preparation example Construction

[0087] The invention relates to a polyamide 5X high-strength yarn and a preparation method thereof.

[0088]

[0089] The raw materials for the production of polyamide 5X high-strength yarn of the present invention at least include: 1,5-pentamethylenediamine and dicarboxylic acid; or, polyamide obtained by polymerization of 1,5-pentamethylenediamine and dicarboxylic acid as monomers 5X.

[0090] Dicarboxylic acids may include short chain dibasic acids and / or long chain dibasic acids. The short-chain dibasic acid may be selected from any one of succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid or sebacic acid. The long-chain dibasic acid can be selected from undecane dibasic acid, dodecane dibasic acid, tridecane dibasic acid, tetradecane dibasic acid, pentadecane dibasic acid, hexadecane dibasic acid, Any one of heptadecandioic acid, octadecanedioic acid, maleic acid, or Δ9-1,18 octadecenedioic acid.

[0091] In polyamide 5X, X can be an ...

Embodiment 1

[0188] Example 1: Polyamide 56 high-strength wire (1670dtex / 192f)

[0189] The present embodiment provides a kind of preparation method of polyamide 56 high-strength silk, it comprises the steps:

[0190] (1), heating the polyamide 56 resin to a molten state to form a polyamide 56 melt;

[0191] (2), polyamide 56 melt is carried out spinning, forms as-spun silk;

[0192] (3) Polyamide 56 high-strength yarn is obtained after processing the as-spun yarn.

[0193] Wherein, in the step (1), the relative viscosity of the polyamide 56 resin (in slice form) is 3.4, which is prepared by a biological fermentation method.

[0194] The heating in step (1) is carried out in a single-screw extruder, and the screw extruder is divided into five zones for heating. The temperature in the first zone is 270°C, the temperature in the second zone is 290°C, and the temperature in the third zone is 300°C. The temperature in the fourth zone is 305°C, and the temperature in the fifth zone is 300°C....

Embodiment 2

[0201] Embodiment two: Polyamide 56 high-strength wire (2800dtex / 480f)

[0202] The present embodiment provides a kind of preparation method of polyamide 56 high-strength silk, it comprises the steps:

[0203] (1), heating the polyamide 56 resin to a molten state to form a polyamide 56 melt;

[0204] (2), polyamide 56 melt is carried out spinning, forms as-spun silk;

[0205] (3) Polyamide 56 high-strength yarn is obtained after processing the as-spun yarn.

[0206] Wherein, in the step (1), the relative viscosity of the polyamide 56 resin (in slice form) is 3.6, which is prepared by a biological fermentation method.

[0207] The heating in the step (1) is carried out in a single-screw extruder, and the screw extruder is divided into five zones for heating, the temperature in the first zone is 285°C, the temperature in the second zone is 305°C, and the temperature in the third zone is 310°C. The temperature in the fourth zone is 315°C, and the temperature in the fifth zone ...

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Abstract

The invention provides a polyamide 5X high-strength fiber and a preparation method thereof. The production raw materials of the polyamide 5X high-strength silk at least include 1,5-pentamethylene diamine and dicarboxylic acid, and the breaking strength of the polyamide 5X high-strength silk is 8.0-10.0cN/dtex. The preparation method comprises the following steps: (1) polymerizing 1,5-pentamethylene diamine with dicarboxylic acid, thereby forming polyamide 5X melt, or heating the polyamide 5X resin till reaching a molten state, thereby forming the polyamide 5X melt; (2) spinning the polyamide 5X melt, thereby forming a raw fiber; and (3) treating the raw fiber, thereby obtaining the polyamide 5X high-strength silk. The polyamide 5X high-strength silk provided by the invention has the characteristics of high strength, low elongation and low heat shrinkable property, has the advantages of excellent wear resistance and excellent alkaline resistance, and has an excellent flame retardant effect.

Description

technical field [0001] The invention belongs to the technical field of polyamide materials, and relates to a polyamide 5X high-strength yarn and a preparation method thereof. Background technique [0002] Polyester and nylon high-strength 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 for high-strength yarn: one is the direct spinning method of melt viscosification, and the other is the indirect spinning method of solid-phase viscosification of slices. [0004] At present, polyester and polyamide 66 are the main high-strength yarns, but when polyester and polyamide 66 are used as high-strength yarns, there are certain requirements for their flame retardancy, so a certain flame retardant need...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/90D01F6/60D01F6/80D01F1/10C08G69/26
CPCC08G69/26D01F1/10D01F6/60D01F6/80D01F6/90
Inventor 孙朝续徐晓辰秦兵兵刘修才
Owner CATHAY R&D CENT CO LTD
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