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Processing method of high-strength low-shrinkage nylon 6 fine denier filament

A low-shrinkage nylon and processing method technology, applied in the field of nylon yarn processing, can solve problems such as low strength and large dry heat shrinkage

Inactive Publication Date: 2011-09-14
CHANGSHU POLYESTER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method is a one-step method to produce FDY products, it has low strength and large dry heat shrinkage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A) preparing materials, adding nylon 6 slices into a feed bin protected by nitrogen gas to obtain a material to be melted;

[0032] B) melting: introducing the material to be melted obtained from step A) into a screw extruder with electric heating function for melting, the melting temperature of the screw extruder is 265° C. to obtain a melt (that is, to obtain a spinning melt);

[0033] C) Forming, the melt obtained by B) is introduced from the upper part of the spinning box through the melt pipeline with a temperature of 265 ° C for biphenyl steam insulation, and the temperature of 265 ° C for biphenyl steam insulation is also used on the spinning box. The melt in the spinning box is quantitatively pressed into the spinning assembly by a metering pump and sprayed out from a circular spinneret hole with a hole diameter of 0.35 mm on the spinneret to obtain a tow;

[0034] D) Cooling, introducing the tow obtained in step C) into the slow cooling zone for slow cooling, t...

Embodiment 2

[0039] A) preparing materials, adding nylon 6 slices into a feed bin protected by nitrogen gas to obtain a material to be melted;

[0040] B) Melting: introducing the material to be melted from step A) into a screw extruder with electric heating function for melting, the melting temperature of the screw extruder is 272° C. to obtain a melt (that is, to obtain a spinning melt);

[0041] C) Forming, the melt obtained by B) is introduced from the upper part of the spinning box through a melt pipeline with a temperature of 270 ° C for biphenyl steam insulation, and a temperature of 270 ° C for biphenyl steam insulation is also used on the spinning box. The melt in the spinning box is quantitatively pressed into the spinning assembly by a metering pump and sprayed out from a circular spinneret hole with a diameter of 0.3mm on the spinneret to obtain a filament bundle;

[0042] D) Cooling, introducing the tow obtained in step C) into the slow cooling zone for slow cooling, then pass...

Embodiment 3

[0047] A) preparing materials, adding nylon 6 slices into a feed bin protected by nitrogen gas to obtain a material to be melted;

[0048] B) Melting: introducing the material to be melted obtained in step A) into a screw extruder with electric heating function for melting, the melting temperature of the screw extruder is 278° C., to obtain a melt (that is, to obtain a spinning melt);

[0049] C) Forming, the melt obtained by B) is introduced from the upper part of the spinning box through a melt pipe that is insulated by biphenyl steam at a temperature of 275 ° C, and the temperature is also used on the spinning box. The melt in the spinning box is quantitatively pressed into the spinning assembly by the metering pump and sprayed out from the circular spinneret holes with a diameter of 0.25mm on the spinneret to obtain filaments;

[0050] D) Cooling, introducing the tow obtained in step C) into the slow cooling zone for slow cooling, then passing through (passing) the side bl...

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Abstract

The invention discloses a processing method of a high-strength low-shrinkage nylon 6 fine denier filament, belonging to the technical field of nylon filament processing. The method comprises the following steps: preparing materials: adding the nylon 6 slices into a bin of nitrogen protective gas to obtain a material to be melted; melting: introducing the material to be melted into a screw extruder for melting to obtain a melt; forming: introducing the melt from the upper part of a spinning box, and ejecting from a spinneret orifice of a spinneret plate to obtain a filament bundle; cooling: introducing the filament bundle into a slow-cooling area for slow cooling, forming through side-blowing air cooling, and further cooling through a channel; oiling and pre-interlacing: oiling the cooling-formed filament bundle through an oil lip or oil wheel, and pre-interlacing; drafting: feeding the filament bundle to be drafted through a feeding roller, drafting through a heat roller, and then performing relax-type setting to obtain the drafting-set filament; and re-interlacing and re-oiling: re-interlacing and re-oiling the drafting-set filament before packaging to obtain the high-strength low-shrinkage nylon 6 fine denier filament. The method can adapt to different purposes of products, and can be applied to the occasions having rigorous requirements on the breaking strength and dry heat shrinkage.

Description

technical field [0001] The invention belongs to the technical field of nylon yarn processing, and in particular relates to a processing method for high-strength and low-shrinkage nylon 6-fine denier yarn. Background technique [0002] Nylon 6 is polyamide 6 resin, also known as polycaprolactam, also known as PA6 or nylon 6. The known processing methods of nylon 6 fine denier high-strength yarn mainly include one-step method and two-step method. The one-step method is commonly used in the industry and is considered to be an advanced method. Its process is: slice melting, screw extruder extrusion, metering pump quantitatively pressing into the spinning assembly, spinneret nozzle hole ejection, side blowing Cooling, further cooling in the tunnel, oiling of oil rollers, interlacing and high-speed winding after passing through godet rollers. The drafting ratio of this method is between 1.5-2.5, the drafting setting temperature is 160-180°C, the breaking strength of nylon 6 fine ...

Claims

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Application Information

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IPC IPC(8): D01D5/088D01D5/16D02J1/08D01D10/00D01D10/02
Inventor 顾洪达
Owner CHANGSHU POLYESTER
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