Polyester pre-oriented yarn (POY) spinning method

Abstract

The invention provides a polyester pre-oriented yarn (POY) spinning method. According to the method, two layers of 100 / 50 mesh filter screens are rolled together to be rolled into multi-layer filter screens of 10 layers, and impurities in molten liquid is filtered away. The filtered molten liquid forms a plurality of strands of monofilament thin flows sprayed out of spinneret holes positioned in a round spinneret plate, the spinneret plate is provided with two circles of spinneret holes distributed in a concentric circle mode, the two circles of spinneret holes are respectively located at the positions of concentric circles with the diameters respectively being 30mm and 66mm, and the spinneret holes are cylindrical holes with cone holes. According to the spinning method, an advanced cross air blow cooling technology is adopted to cool the plurality of strands of monofilament thin flows sprayed out of the spinneret holes, and the method not only can prolong the plate clearing cycle and reduce production consumption, but also enables the molten liquid to fully evenly mixed, enables the impurities to be filtered, reduces monofilament hairs and breakage, effectively improves evenness uniformity of superfine porous fibers and improves product superior quality rate.

Description

technical field [0001] The invention relates to the field of textile industry, in particular to a spinning method of polyester pre-oriented yarn (POY). Background technique [0002] Fine denier refers to fibers with a single-filament fineness of 1.0-0.5 dpf, fibers with a single-filament fineness of 0.5-0.1 dpf are called ultra-fine denier fibers, and fibers with a single-filament fineness lower than 0.1 dpf are called micro-denier fibers. In the production process of polyester pre-oriented yarn, the polyester melt is filtered, mixed and distributed in the spinning assembly, the impurities in the melt are filtered out, the uniformity of the melt is improved, and the filtered and mixed melt passes through the conveying channel It is transported to the spinning box, and is sprayed out from the spinneret holes on the spinneret in the spinning box to form nascent fibers, cooled by cooling air, then oiled through oil nozzles, and finally wound into shape. The circular spinneret ...

AI Technical Summary

Problems solved by technology

The circular spinneret used in the prior art has multiple circles of spinneret holes arranged in concentric circles, the distance between two adjacent circles of spinneret holes is small, and the ring blowing is used to spray all the spinneret holes. When the single-filament fine flow is used for cooling, because the single-filament is thin and light, it is easy to deflect, and the single-filaments of two adjacent circles are prone to cross and bond; when the cooling wind speed decreases, its penetration performance is poor, due to the spray The large number of loops in the wire hole makes the cooling effect of the monofilament differ greatly from inside to outside, and the solidification point deviates greatly, which is unfavorable for the next step of drafting, and also makes the monofilament of the same batch uneven in strength, elongation and dyeing. Poor spinning stability

Moreover, the spinneret cleaning cycle in the prior art is short, the production consumption is large, and the yield of the product is low

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