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Industrial functional chinlon 66 fibre and preparation method thereof

A functional and industrial technology, applied in the field of fiber production, can solve the problems of rough technology, simple drying process, incomplete and reasonable structure of spinning box of equipment and equipment, etc.

Active Publication Date: 2013-09-11
LIAONING YINZHU CHEMTEX GROUP
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  • Abstract
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Problems solved by technology

Invention patent CN101634053A (2010.1.27) discloses the method of producing fine-denier nylon 66 full-drawn yarn. Although the patent comprehensively introduces the spinning and drafting of drying from raw material slices, extrusion spinning and thermal drafting and shaping winding One-step process technology, but the drying process is simple, the technology is relatively rough, and the structure of the equipment and equipment including the spinning box is not completely reasonable, especially in the industrial functional type used in the fields of airbags, parachutes, ropes and sewing threads. Low-denier nylon 66 full-drawn yarn has extremely strict performance requirements, not only high strength (≥8.5g / d) but also low shrinkage (≤3%), and the product access threshold is extremely high

Method used

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  • Industrial functional chinlon 66 fibre and preparation method thereof

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Embodiment

[0035] The specific process for producing functional FDY fibers for medium and low denier nylon 66 industrial use:

[0036] 1. Add ordinary filament-grade nylon 66 slices (relative viscosity of slices is 2.5-3.0, sulfuric acid method) into the vacuum drum type solid-phase polymerization kettle, seal and heat up, vacuumize (residual pressure < 0.2mmHg) and heat up at 2- Rotate at 10 rpm, solid phase polymerization temperature is 100-160°C, and the time is 4-8 hours.

[0037] 2. The relative viscosity of the slices is determined to be above 3.3 by sampling. Stop heating and lower the temperature. When the temperature of the kettle drops to 40-50°C, fill the kettle with nitrogen to eliminate the vacuum discharge.

[0038] 3. Send the solid-phase thickened chips into the pre-spinning silo, and then send them to a separate screw extruder with a pin-type mixing head for melting and extrusion. The melt temperature is controlled at 280-285°C.

[0039] 4. The spinning melt is sent to ...

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Abstract

The invention discloses industrial functional chinlon 66 fibre and a preparation method thereof, and belongs to the technical field of fibre production. The method comprises the following steps: adopting chinlon 66 slices, tackifying through solid-phase polymerization, adopting a one stage process route of spinning, drafting and forming, and producing the industrial functional chinlon 66 FDY (Fully Drawn Yarn) fibre with middle low denier, high strength and low shrink on a spin-draft integrated device with an unique structure, wherein the total denier of a tow is 50 to 300 tex; the single silk fineness dpf is 1 to 5; the strength is larger than or equal to 8.5 g / d; and the dry heat shrinking percentage is less than or equal to 3%.

Description

technical field [0001] The invention relates to the technical field of fiber production, in particular to an industrial functional nylon 66 fiber and a preparation method thereof. Background technique [0002] As we all know, nylon 66 fiber has excellent physical and mechanical properties and is favored, especially nylon 66 industrial yarn has high strength, fatigue resistance, impact resistance, friction resistance, low unit mass, good heat resistance, good dimensional stability and easy to use. Processing and other characteristics, its application is very wide. [0003] In recent years, as the demand for nylon 66 industrial yarns in domestic and foreign markets continues to change, the market competition has become increasingly fierce; it is particularly worth mentioning that due to the rapid development of the automobile industry, the demand for low- and medium-denier nylon as the main raw material for automotive airbags 66 The demand for industrial silk is increasing, a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D01D5/08D01D5/084D01D5/088D01D5/098D01D7/00D01F6/60
Inventor 杜选
Owner LIAONING YINZHU CHEMTEX GROUP
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