Method for producing regenerative heavy denier profiled polyester staple fibres

Abstract

The invention relates to a method for producing regenerative heavy denier profiled polyester staple fibres. The method comprises the following main procedures: selecting high-quality regenerative polyester bottle chips and spinning the bottle chips to form fibres with profiled sections through drying, melting spinning, cooling, drawing and setting. The method has the following main characteristics: A) after being dried, the moisture contents of the regenerative polyester bottle chips are below 80PPM; B) the melting temperature is controlled between 270 DEG C and 285 DEG C and the spin beam temperature is controlled between 275 DEG C and 278 DEG C; and C) a mist and recirculating air dual-purpose cooling device is adopted for cooling, the mist spray speed is 3.8-4.0m / s and the water temperature is not more than 30 DEG C. The method has the following positive effects: by adopting the cooling method and device combining mist spray cooling and recirculating air cooling for the fibres which are extruded, melted and spouted, the good setting property of the profiled sections of the fibres is ensured and the problem that the sections of the fibres tend to be round due to surface tension existing when the polymer melt is extruded from the spinneret orifice is solved, so that the fibres have multidimensional reflecting effects as the diamond shaped mirrors.

Description

technical field [0001] The invention relates to a production method for producing regenerated coarse-denier special-shaped polyester fiber by using water mist spray and circular air cooling at the same time, especially a production method for spinning special-shaped polyester fiber by using waste mineral water bottle flakes (regenerated polyester bottle flakes). Background technique [0002] The present invention responds to the environmental pollution caused by more and more discarded mineral water bottles, recycles waste mineral water bottles, melts them at a high temperature through a temperature control system, and spins a new type of environmentally friendly special-shaped polyester fiber, which is used as a garment , thermal insulation raw materials for bedding and raw materials for audio production, to realize high-value-added products of high-performance fiber products and environmentally friendly fibers. [0003] Special-shaped fibers are mainly manifested in fibers...

AI Technical Summary

Problems solved by technology

[0004] The existing melt-spinning method produces special-shaped fibers. The fibers coming out of the spinneret are only cooled by the ring air. Because the cooling speed of the ring air is slow and the cooling effect is poor, the cross-section of the spun fiber is quite different from the cross-section of the spinneret hole. Large, unable to achieve the effect of "alien"