High-efficiency polyolefin/polyester sheath-core composite direct spinning system and method

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 ...

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).

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