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Medium-strength fiber and processing method thereof

A processing method and high-strength technology, applied in stretch spinning, artificial filament heat treatment, textiles and papermaking, etc., can solve the problems of low stretch setting temperature, low orientation, low crystallinity, poor dimensional stability, etc., and achieve molecular structure Stable, good dimensional stability, dimensional stable effect

Inactive Publication Date: 2016-03-02
ZHEJIANG GUXIANDAO IND FIBER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional medium-strength yarns are mostly produced on spinning equipment for civilian yarns, which are prepared by polyester (intrinsic viscosity slightly higher than civilian FDY) of about 0.70dl / g, or by a two-step method (POY-DY ) preparation, but usually there are only two pairs of rollers in civil silk spinning equipment, and there is only one stage in the stretching and setting process, so the orientation and crystallinity are low, the breaking strength is low (at 4.0cN / dtex), and the breaking elongation is large (at 30% left and right), poor dimensional stability; and in the filament forming process, the stretch setting temperature is low and the draw ratio is small, so it is difficult to be used in industrial fields that require high breaking strength and dimensional stability

Method used

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  • Medium-strength fiber and processing method thereof
  • Medium-strength fiber and processing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: the processing of strong yarn in chip spinning 840dtex / 192f

[0028] A kind of processing method of medium-strength wire of the present embodiment, combines figure 1 and figure 2 , with slices as the initial material, the processing flow is: spinning → cooling → oiling → multi-stage stretching heat setting (first stage medium temperature stretching → second stage high temperature stretching → third stage high temperature stretching) → network → winding .

[0029] Chip viscosity 0.85dl / g, b value ≤ 2.0, water content ≤ 20ppm.

[0030] (1) Spinning stage:

[0031] Zone 1 temperature: 285°C

[0032] Zone 2 temperature: 295°C

[0033] Zone 3 temperature: 292°C

[0034] Zone 4 temperature: 290°C

[0035] Zone 5 temperature: 285°C

[0036] Metering pump front pressure: 51.4bar

[0037] Pressure after metering pump: 162.5bar

[0038] Metering pump speed: 12.44rpm

[0039] Biphenyl box temperature: 298°C

[0040] Post heating 1: 340 / 340°C

[0041] Sp...

Embodiment 2

[0065] Embodiment 2: the processing of the strong yarn in the chip spinning 555dtex / 96f

[0066] The setting and working principle of this embodiment are the same as that of Embodiment 1, the difference is that:

[0067] (1) Spinning stage:

[0068] Zone 1 temperature: 288°C

[0069] Zone 2 temperature: 298°C

[0070] Zone 3 temperature: 295°C

[0071] Zone 4 temperature: 292°C

[0072] Zone 5 temperature: 288°C

[0073] Metering pump front pressure: 55bar

[0074] Pressure after metering pump: 150bar

[0075] Metering pump speed: 12.56rpm

[0076] Biphenyl box temperature: 300°C

[0077] Post heating 1: 330 / 330°C

[0078] Spinning assembly: the precision of the filter element is 20 μm, the number of spinneret holes is 2*48, and the size of the spinneret hole is 0.3*1.1mm.

[0079] (2) Cooling stage:

[0080] Cooling adopts side blowing: wind temperature 25°C, relative humidity 5%, wind speed 1.0m / s.

[0081] (3) Oiling stage:

[0082] Oiling agent model: GXM-100,...

Embodiment 3

[0097] Embodiment 3: Melt spinning 840dtex / 192f medium strong yarn processing

[0098] The setting and working principle of this embodiment are the same as that of Embodiment 1, the difference is that:

[0099] In this embodiment, polyester melt is used as raw material, and the viscosity of the raw material is 0.85-1.10dl / g.

[0100] (1) Spinning stage:

[0101] Metering pump front pressure: 45bar

[0102] Pressure after metering pump: 160bar

[0103] Biphenyl box temperature: 290-298°C

[0104] Post heating 1: 330 / 330°C

[0105] Spinning assembly: the precision of the filter element is 20 μm, the number of spinneret holes is 2*96 holes, and the size of the spinneret hole is 0.4*1.2mm.

[0106] (2) Cooling stage:

[0107] Cooling adopts side blowing: wind temperature 18°C, relative humidity 10%, wind speed 0.5m / s.

[0108] (3) Oiling stage:

[0109] Oiling agent model: GXM-100, oil concentration 93%; oil pump speed 30rpm.

[0110] (4) Drafting stage:

[0111]

[0...

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Abstract

The invention relates to a medium-strength fiber and a processing method thereof, and belongs to the fiber manufacture technical field; the method uses slices or melt as primary material, and the fiber is formed by the following steps: spinning, cooling, oiling, and multistage stretching heat setting; the multistage stretching heat setting is completed in four pairs of rollers; the first pair of rollers are cold rollers; the second, third, and fourth pairs of rollers are hot rollers. The method is applied to medium-strength fiber processing, stable in spinning condition, low in waste fiber rate, and high viscosity slices are employed in the medium-strength fiber processing, thus obtaining the medium-strength fiber with high breaking tenacity, good dimension stability, and stable mechanical property.

Description

technical field [0001] The invention relates to a medium-strength yarn and a processing method thereof, belonging to the technical field of special fibers. 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 yarns are mostly produced on spinning equipment for civilian yarns, which are prepared by polyester (intrinsic viscosity slightly higher than civilian FDY) of about 0.70dl / g, or by a two-step method (POY-DY ) preparation, but usually there are only two pairs of rollers in civil silk spinning equipment, and there is only one stage in the stretching and setting process, so the orientation and crystallinity are low, the breaking strength is low (at 4.0cN / dtex), and the breaking elongation is large (at 30% Left and right), poor dimensional stability; and in the filame...

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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Patent Type & Authority Applications(China)
IPC IPC(8): D01D13/00D01D5/12D01D10/02
Inventor 金革刘雄杨志超张德慧石教学
Owner ZHEJIANG GUXIANDAO IND FIBER
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