A kind of production equipment and preparation method of low linear density polyester fiber

A polyester fiber and production equipment technology, applied in the production equipment and preparation field of low linear density polyester fiber, can solve the problem of reducing the frictional resistance between the filament and the air, shortening the spinning process of the filament bundle, and poor cooling uniformity of the filament and other problems to achieve the effect of avoiding bad molding, reducing frictional resistance, and reducing winding tension

Active Publication Date: 2022-05-24
JIANGSU DELI CHEM FIBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

By improving the cooling device, the present invention solves the problem of poor cooling uniformity of the filament when preparing low linear density polyester fibers in the prior art. The friction resistance between the filament and the air is reduced, and the winding tension is reduced. The present invention finally prepares high-quality and well-formed low-linear-density polyester fibers with a breaking strength of 2.8 to 3.0 cN / dtex and a breaking elongation of 110~115%, the unevenness rate CV% is 0.70~0.85

Method used

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  • A kind of production equipment and preparation method of low linear density polyester fiber
  • A kind of production equipment and preparation method of low linear density polyester fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] like Figures 1 to 2 As shown in the figure, a production equipment for low linear density polyester fiber includes a spinning box 1 (used to keep the internal device of the box warm) and a cooling device 11 (used for melt extrusion) arranged in sequence from top to bottom fiber after cooling), oiling device 12 (for oiling and moisturizing the fiber tow 8) and godet device and winding device (for winding the fiber tow 8, which is then packaged into a shaped cake) ;

[0040] A spinning assembly is arranged inside the spinning box 1, and the spinning assembly includes a melt filter chamber 2 and a spinneret 3 located below it;

[0041] The cooling device is a dual air box combined ring blowing cooling device, which consists of upper and lower ring blowing boxes; the upper ring blowing box 9.1 has an upper air chamber 10.1 and a first air chamber 10.2 from top to bottom, and the lower ring blowing box 9.2 is inside There are a second air chamber 10.3 and a lower air cham...

Embodiment 2

[0046] A kind of preparation method of low linear density (6dtex / 6f) polyester fiber, adopts the equipment of embodiment 1, specifically comprises the following steps:

[0047] (1) Melt extrusion: metal sand and a metal filter screen are loaded into the melt filter chamber in the spinning assembly to filter the melt, and the filtered melt is extruded into primary fibers from the spinneret, wherein, The extrusion temperature is 298℃;

[0048] (2) Cooling and solidification: The primary fibers extruded from the spinneret are cooled and formed by a cooling device, wherein the cooling air temperature is 19 ° C, the air humidity is 75%, the air supply air pressure is 800 Pa, and the length of the cooling zone in the upper air chamber is 180mm, and the length of the cooling zone in the lower air chamber is 150mm;

[0049] (3) Cluster oiling: the cooled and formed tows are then clustered and oiled and wetted by the oiling device, wherein the height of the oil frame is 600mm, and the...

Embodiment 3

[0061] A preparation method of low linear density polyester fiber (6.6dtex / 6f), using the equipment of embodiment 1, specifically comprises the following steps:

[0062] (1) Melt extrusion: metal sand and a metal filter screen are loaded into the melt filter chamber in the spinning assembly to filter the melt, and the filtered melt is extruded into primary fibers from the spinneret, wherein, The extrusion temperature is 298℃;

[0063] (2) Cooling and solidification: The primary fibers extruded from the spinneret are cooled and formed by a cooling device, wherein the cooling air temperature is 20 ° C, the air humidity is 76%, the wind pressure at the spinning position is 700 Pa, and the length of the cooling zone in the upper air chamber is 185mm, the length of the cooling zone in the lower air chamber is 155mm;

[0064] (3) Cluster oiling: the cooled and formed tows are then clustered and oiled and wetted by the oiling device, wherein the height of the oil frame is 600mm, and...

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Abstract

The invention relates to a production equipment and preparation method of low linear density polyester fiber. The production equipment includes a spinning box, a cooling device, an oiling device, a godet device and a winding device; the cooling device is a double bellows combined ring The blowing cooling device is composed of upper and lower ring blowing boxes; the inside of the upper ring blowing box has an upper wind chamber and the first stroke chamber from top to bottom, and the inside of the lower ring blowing box has a second stroke chamber and a lower wind chamber from top to bottom , the center position of the lower air chamber is provided with a trumpet-shaped ring air blowing filter assembly; the wire guide winding device includes a wire guide, a network device, two guide wires, a roller guide and a winding drum, from a wire guide through the network The fiber bundles from the device to the second godet are on the same horizontal straight line; the preparation method includes the steps of melt extrusion, cooling and solidification, cluster oiling and winding molding. The equipment of the invention solves the problems of impervious cooling and uneven cooling of the existing cooling device; the low linear density polyester fiber prepared by the method of the invention has excellent performance.

Description

technical field [0001] The invention belongs to the technical field of low density polyester fibers, and relates to a production equipment and a preparation method of low linear density polyester fibers. Background technique [0002] With the improvement of people's quality of life and the development of material technology, it is more and more difficult for ordinary fabrics to meet people's diversified requirements in different environments. Functional fibers and fabrics show their innate advantages in this regard and can meet people's needs Fabrics are becoming more and more diverse, even demanding. However, different functional textile fabrics in the prior art have their own adaptability and conditions, and are not capable of meeting people's comprehensive needs. At the same time, the existing multi-functional fabric usually adopts a multi-layer composite fabric structure, and the above-mentioned structure results in a thick fabric, poor air permeability and short servic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/08D01D5/092D01D5/096D01D7/00D01D11/00
CPCD01D5/08D01D5/092D01D5/096D01D7/00D01D11/00
Inventor 赵金广蔡瑞张秉怀郭建洋赵慧娟
Owner JIANGSU DELI CHEM FIBER CO LTD
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