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Polyamide 5X medium-tenacity yarn and preparation method thereof

A polyamide and as-spun yarn technology, applied in the field of polyamide materials, can solve problems such as low stretch setting temperature, strong filament orientation, low crystallinity fracture strength, difficulty in applying fracture strength and dimensional stability requirements, etc.

Active Publication Date: 2017-06-13
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 orientation degree, crystallinity and breaking strength of the polyester produced by this method are low, and the dimensional stability is poor; Industrial fields requiring high breaking strength and dimensional stability
[0003] Chinese patent CN 101205632 A provides a process for producing medium-strength polyester filaments by melt direct spinning, and Chinese patent CN 105369375 A provides a medium-strength yarn and its processing method. The medium-strength polyester filaments reported in the two patents are The silk materials are all polyester, and the obtained polyester medium-strength yarn not only has low mechanical properties, but also has poor wear resistance and alkali resistance.

Method used

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  • Polyamide 5X medium-tenacity yarn and preparation method thereof
  • Polyamide 5X medium-tenacity yarn and preparation method thereof
  • Polyamide 5X medium-tenacity yarn and preparation method thereof

Examples

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preparation example Construction

[0078] The invention relates to a polyamide 5X medium-strength yarn and a preparation method thereof.

[0079]

[0080] The raw materials for producing polyamide 5X in the present invention at least include: 1,5-pentamethylenediamine and dicarboxylic acid; or polyamide 5X obtained by polymerization of 1,5-pentamethylenediamine and dicarboxylic acid as monomers.

[0081] 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.

[0082] In polyamide 5X, X can be an integer from 2 to 18. For e...

Embodiment 1

[0170] Example 1: Polyamide 56 medium strong wire (550dtex / 96f)

[0171] The present embodiment provides a kind of preparation method of strong filament in polyamide 56, and it comprises the steps:

[0172] (1), heating the polyamide 56 resin to a molten state to form a polyamide 56 melt;

[0173] (2), polyamide 56 melt is carried out spinning, forms as-spun silk;

[0174] (3) Polyamide 56 medium-strength yarn is obtained after the as-spun yarn is processed.

[0175] Wherein, in the step (1), the relative viscosity of the polyamide 56 resin (in slice form) is 2.7, which is prepared by a biological fermentation method.

[0176]The heating in the step (1) is carried out in a single-screw extruder, and the screw extruder is divided into five heating zones, the temperature in the first zone is 250°C, the temperature in the second zone is 260°C, and the temperature in the third zone is 275°C. The temperature in the fourth zone is 285°C, and the temperature in the fifth zone is 2...

Embodiment 2

[0183] Example 2: Polyamide 56 medium strong wire (830dtex / 192f)

[0184] The present embodiment provides a kind of preparation method of strong filament in polyamide 56, and it comprises the steps:

[0185] (1), heating the polyamide 56 resin to a molten state to form a polyamide 56 melt;

[0186] (2), polyamide 56 melt is carried out spinning, forms as-spun silk;

[0187] (3) Polyamide 56 medium-strength yarn is obtained after the as-spun yarn is processed.

[0188] Wherein, in the step (1), the relative viscosity of the polyamide 56 resin (in slice form) is 2.8, which is prepared by a biological fermentation method.

[0189] The heating in the step (1) is carried out in a single-screw extruder, and the screw extruder is divided into five heating zones, the temperature in the first zone is 255°C, the temperature in the second zone is 265°C, and the temperature in the third zone is 285°C. The temperature in the fourth zone is 290°C, and the temperature in the fifth zone is...

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Abstract

The invention provides polyamide 5X medium-tenacity yarn and a preparation method thereof. Production raw materials of the polyamide 5X medium-tenacity yarn at least include 1,5-pentamethylene diamine and dicarboxylic acid or polyamide 5X obtained by polymerizing 1,5-pentamethylene diamine and dicarboxylic acid serving as monomers; the breaking strength of the polyamide 5X medium-tenacity yarn is 6.0-8.0 cN / dtex. The preparation method comprises the steps as follows: (1) 1,5-pentamethylene diamine and dicarboxylic acid are polymerized to form polyamide 5X melt; or polyamide 5X resin is heated to be in a molten state to form the polyamide 5X melt; (5) the polyamide 5X melt is spun to form primary yarn; (3) the primary yarn is treated to form the polyamide 5X medium-tenacity yarn. The polyamide 5X medium-tenacity yarn has the characteristics of high strength, low elongation, low heat shrink performance and the like; besides, the polyamide 5X medium-tenacity yarn also has the advantages of good wear resistance, good alkali resistance, size stability and the like, so that the polyamide 5X medium-tenacity yarn can be widely applied to the fields of sewing threads, safety belts, ropes, fishing nets, filter cloth and the like.

Description

technical field [0001] The invention belongs to the technical field of polyamide materials, and relates to a polyamide 5X medium-strength yarn and a preparation method thereof. Background technique [0002] Medium-strength yarn refers to the fiber whose breaking strength is between civil yarn and low-denier industrial yarn, and is mostly used in the manufacture of fishing nets and industrial sewing threads. Traditional medium-strength yarn is generally made of polyester, which is processed on spinning equipment for civilian yarn. The orientation degree, crystallinity and breaking strength of the polyester produced by this method are low, and the dimensional stability is poor; Industrial fields requiring high breaking strength and dimensional stability. [0003] Chinese patent CN 101205632 A provides a process for producing medium-strength polyester filaments by melt direct spinning, and Chinese patent CN 105369375 A provides a medium-strength yarn and its processing method...

Claims

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Application Information

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IPC IPC(8): D01F6/60D01F6/90D01F1/10C08G69/26C08G69/28D01D5/098
CPCD01F1/10D01F6/60D01F6/90C08G69/26C08G69/28D01D5/08D01D5/088D01D5/16D01D10/02
Inventor 孙朝续徐晓辰秦兵兵刘修才
Owner CATHAY R&D CENT CO LTD
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