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Long-carbon chain polyamide fiber and preparation method thereof

A carbon chain polyamide and fiber technology, applied in the field of modified polyamide fiber and its preparation, can solve problems such as poor hand feel, pollution, unusability, etc., and achieve broad industrial application prospects, ease dependence, and excellent tensile strength. Effect

Active Publication Date: 2017-04-05
CATHAY R&D CENT CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nylon low-denier yarn (200-700dtex) has the characteristics of high breaking strength, wear resistance, fatigue resistance, impact resistance, and good dimensional stability. It is widely used in military products, rubber skeleton materials, airbag wires and ropes, nets, cables fabrics, tarpaulins, industrial filter cloths and other fields; at the same time, because of its soft hand feeling, light texture, good drapability, breathable moisture absorption, good elasticity, easy processing and other good wearability, it is used in high-grade sewing thread silk, T-shirt silk, Umbrella fabrics, sports textiles and other fields have good market prospects. However, PA6 and PA66 (short carbon chain polyamides), which account for more than 90% of the polyamide fiber market share, have low-temperature embrittlement and poor hand feeling. Cannot be used under special circumstances
The traditional long carbon chain polyamides such as nylon 610 and nylon 612 have improved low temperature resistance compared with short carbon chain polyamides, but due to the longer monomer carbon chains, even-numbered carbon chains with poor dyeability Monomer double nylon has worse dyeing performance, resulting in increased dyeing cost and serious environmental pollution
[0003] In addition, the current polyamide products are basically made of petroleum derivatives as raw materials, such as nylon 6 and nylon 66, which have the largest market share. Hexamethylenediamine is prepared by a series of reactions such as oxidation. Hexamethylenediamine is first synthesized from butadiene or acrylonitrile and then prepared by catalytic hydrogenation. The whole synthesis process is complicated and there is some pollution.

Method used

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  • Long-carbon chain polyamide fiber and preparation method thereof

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preparation example Construction

[0073]

[0074] The preparation method of long carbon chain polyamide fiber comprises the following steps:

[0075] (1) At least pentamethylenediamine and dibasic acid are used as raw materials to produce long carbon chain polyamide resins by melting method or solution thermal polycondensation method;

[0076] (2) Slices of polyamide resin with long carbon chains (slices are melted by a single-screw extruder) or melts are ejected from the spinneret to form a thin stream of melts through a screw, a metering pump and a spinning box;

[0077] (3) The fine flow of the melt is solidified into filaments through blowing;

[0078] (4) oiling, drafting and post-processing of the filament bundles to obtain long carbon chain polyamide fibers.

[0079] Wherein, in step (2), the temperature of the spinning box used to produce spinning is 210-290°C, preferably 230-280°C. The shape of the hole of the spinneret on the spinneret can be selected according to the cross-sectional shape of the...

Embodiment 1

[0105] The preparation method of polyamide 510 fiber in the present embodiment is as follows:

[0106] (1) Replace the air in a 100-liter polymerization kettle (K / SY166-2007 type) with nitrogen, add 30kg of pure water to the reaction kettle, and then add 10.06kg (98.5mol) of pentamethylenediamine (including renewable source of organic carbon), after stirring, add 19.93kg (98.5mol) sebacic acid, adjust the pH value to 7.7 with a small amount of pentamethylenediamine and sebacic acid (salt solution is diluted to 10% detection result), then add 0.9g Antioxidant H10, prepared nylon salt solution.

[0107] (2) Under a nitrogen environment, the temperature of the oil bath gradually rises to 280°C. When the pressure in the polymerization kettle rises to 1.73Mpa, start to exhaust. When the temperature in the kettle reaches 265°C, vacuumize to -0.06Mpa and maintain the vacuum degree After 20 minutes, polyamide 510 was prepared.

[0108] (3) Charge nitrogen into the polymerization ket...

Embodiment 2

[0118] The preparation method of polyamide 510 fiber in the present embodiment is as follows:

[0119](1) Replace the air in a 100-liter polymerization kettle (K / SY166-2007 type) with nitrogen, add 20kg of pure water to the reaction kettle, and then add 10.06kg (98.5mol) of pentamethylenediamine (including renewable source of organic carbon), after stirring, add 19.93kg (98.5mol) sebacic acid, adjust the pH value to 8.2 with a small amount of pentamethylenediamine and sebacic acid (dilute the salt solution to 10% detection result), then add 9g anti Oxygen H10, prepared polyamide salt solution.

[0120] (2) Under a nitrogen environment, the temperature of the oil bath is gradually raised to 280°C. After the pressure in the polymerization kettle rises to 1.73Mpa, the exhaust gas is started. When the temperature in the kettle reaches 245°C, add 90g of TiO 2 When the temperature in the kettle reaches 270°C, vacuumize to -0.08Mpa and keep the vacuum for 20min to prepare nylon 510....

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Abstract

The invention provides a long-carbon chain polyamide fiber and a preparation method thereof. The long-carbon chain polyamide fiber is prepared at least from long-carbon chain polyamide resin as a raw material. The raw materials of the long-carbon chain polyamide resin comprise 1, 5-pentamethylene diamine and a dibasic acid. The long-carbon chain polyamide fiber has an initial modulus of 20-60 cN / dtex at -40 DEG C. The preparation method comprises introducing long-carbon chain polyamide resin slices or melt into a spinning box, carrying out spraying by a spinneret plate to obtain fine melt flows, blowing the fine melt flows to obtain cured wires, coating the wires with oil, and carrying out drawing and post-processing on the wires to obtain long-carbon chain polyamide fibers, wherein a spinning speed is 800-6000m / min and the temperature of a later godet is less than 200 DEG C. The preparation method is simple and realizes a low cost. The long-carbon chain polyamide fiber has low temperature resistance, excellent mechanical properties and a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of modified polyamide composite materials, and relates to a modified polyamide fiber and a preparation method thereof. Background technique [0002] Polyamide fiber (also known as nylon fiber) is one of the earliest synthetic fibers put into industrial production in the world, and its output ranks second among synthetic fibers. Nylon low-denier yarn (200-700dtex) has the characteristics of high breaking strength, wear resistance, fatigue resistance, impact resistance, and good dimensional stability. It is widely used in military products, rubber skeleton materials, airbag wires and ropes, nets, cables fabrics, tarpaulins, industrial filter cloths and other fields; at the same time, because of its soft hand feeling, light texture, good drapability, breathable moisture absorption, good elasticity, easy processing and other good wearability, it is used in high-grade sewing thread silk, T-shirt silk, Umbrella f...

Claims

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Application Information

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IPC IPC(8): D01F6/90D01F1/10C08G69/26D01D5/08D01D5/06D01D10/04D01D10/02
CPCC08G69/26D01D5/06D01D5/08D01D10/02D01D10/0436D01F1/10D01F6/90
Inventor 郑毅秦兵兵冯淑芹刘修才
Owner CATHAY R&D CENT CO LTD
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