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Efficient polyolefin-polyester sheath-core composite direct spinning system and method

A composite spinning and spinning system technology, applied in the fields of polymer chemical industry and chemical fiber, can solve problems such as unfavorable quality stability and improvement of composite fiber products, inability to achieve end-use performance, unfavorable industrial chain energy consumption reduction, etc. Tight, strong adhesion, fast fiber forming effect

Active Publication Date: 2017-06-27
JIANGSU JIANGNAN HIGH POLYMER FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional screw melting polyester PET chipping method is not conducive to the reduction of energy consumption in the industrial chain, but also to the stability and improvement of the quality of composite fiber products
It is also unable to meet the new requirements of end-use performance, such as the safety and health requirements that the fiber does not contain heavy metal antimony, etc. (in the PET synthesis process, antimony compounds exist as catalysts, and the content is about 200-300mg / kg).

Method used

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  • Efficient polyolefin-polyester sheath-core composite direct spinning system and method
  • Efficient polyolefin-polyester sheath-core composite direct spinning system and method
  • Efficient polyolefin-polyester sheath-core composite direct spinning system and method

Examples

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Effect test

Embodiment 1

[0039] Such as figure 1 As shown, the high-efficiency polyolefin / polyester sheath-core composite direct spinning system includes a polyester synthesis system, a polyolefin melting system, a composite spinning box 20, a plasma generating device 21 and a spinning tube 21;

[0040]The polyester synthesis system includes a delivery pump 1, a three-way valve 4, an upflow pre-condensation kettle 10, a horizontal single-cavity final polycondensation kettle 11, a discharge and booster pump 12, and a static stirring heat exchanger 13 connected in sequence. , finally connected to the composite spinning beam 20, the polyester synthesis system also includes ethylene glycol pipeline 2, a branch line of the ethylene glycol pipeline 2 is connected to the delivery pump 1 and the three-way valve 4 through the injection pump 3 On the pipeline, another branch line of the ethylene glycol pipeline 2 is connected to the blending tank 6 through the first metering valve 7, and the polyester synthesis...

Embodiment 2

[0045] High-efficiency polyolefin / polyester skin-core composite direct spinning method to produce PE / PET non-heavy metal hot air bonded skin-core composite staple fiber for nonwovens, the steps include:

[0046] (1) Part of the esterification liquid BHET is drawn from the esterification process of ordinary large-scale polyester equipment, and is directly transported to the upflow pre-condensation tank by the delivery pump through the three-way valve, as ethylene glycol for assisting the pre-condensation reaction from ethylene two The alcohol pipeline is drawn out, injected by the syringe pump into the pipeline connected to the delivery pump and the three-way valve to meet with BHET, and the other part of ethylene glycol drawn out from the ethylene glycol pipeline enters the blending tank by the valve to control the flow rate, and is used to blend ethylene glycol titanium , the high-concentration liquid ethylene glycol titanium enters the blending tank from the storage tank thro...

Embodiment 3

[0051] High-efficiency polyolefin / polyester sheath-core composite direct spinning method to produce PP / PET needle-punched thermally bonded asphalt-impregnated sheath-core composite short fibers for non-woven fabrics, the steps include:

[0052] (1) The esterification liquid BHET is directly transported to the upflow pre-condensation tank by the delivery pump through the three-way valve, and the ethylene glycol used to assist the pre-condensation reaction is drawn from the ethylene glycol pipeline and injected into the connection between the delivery pump and the three-way tank by the injection pump. The pipeline of the through valve merges with BHET, and the other part of ethylene glycol drawn from the ethylene glycol pipeline enters the blending tank through the valve to control the flow, and is used to mix ethylene glycol antimony. The high-concentration liquid ethylene glycol antimony is metered from the storage tank. The valve enters the blending tank, diluted with ethylene...

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Abstract

The invention discloses an efficient polyolefin-polyester sheath-core composite direct spinning system. A delivery pump, a three-way valve, a pre-polycondensation kettle, a final polycondensation kettle, a discharging and boosting pump and a static stirring heat exchanger are sequentially connected and finally connected to a composite spinning box, one branch line of an ethylene glycol pipeline is connected to a pipeline arranged between the delivery pump and the three-way valve through an injection pump, the other branch line of the ethylene glycol pipeline is connected to a mixing tank, a material tank is connected to the mixing tank, and the mixing tank is connected to the three-way valve; a stock bin, a screw extruder, a boosting pump and a static mixer are sequentially connected and connected to the composite spinning box, and a plasma generation device is arranged to be connected to the composite spinning box. The invention further discloses an efficient polyolefin-polyester sheath-core composite direct spinning method. According to the system and method, the two selected polymers both do not need a drying system for removing moisture, the efficient on-line polyolefin blending modification mode is adopted, and the condition that polyolefin is degraded by multiple times of heating is avoided. An existing big polyester synthesis system can be fully utilized.

Description

technical field [0001] The patent of the invention relates to a high-efficiency polyolefin / polyester sheath-core composite direct spinning system and method, which belongs to the field of polymer chemical industry and chemical fiber. Background technique [0002] Polyester, especially PET fiber in polyester, is directly spun from synthetic melt, which is a sign of technological progress in this industry. Compared with the method of cooling the melt into solid chips, and then melt spinning by the screw, the energy consumption is greatly reduced. , improve production efficiency, reduce the degradation of macromolecules, and thus greatly improve the product quality of the fiber, especially the uniformity of the physical and mechanical properties of the fiber. [0003] Skin-core composite staple fibers such as polyester, polyolefin, polyamide, and polyacrylonitrile were industrialized as early as the 1980s, mainly functional fibers in clothing and industrial textiles, including ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D13/00D01D5/34D01F8/06D01F8/14
CPCD01D5/34D01D13/00D01F8/06D01F8/14
Inventor 浦金龙陶冶
Owner JIANGSU JIANGNAN HIGH POLYMER FIBER
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