Continuous production method of FDY (fully drawn yarn) superfine denier few-hole fiber

Abstract

The invention discloses a continuous production method of FDY (fully drawn yarn) superfine denier few-hole fibers, which is adjusted on the basis of the conventional FDY fiber production process: canceling the arrangement of a main interlacing nozzle behind two hot rollers, dismantling a pre-interlacing nozzle, directly transferring and replacing the main interlacing nozzle to the pre-interlacing nozzle to carry out net making, and directly replacing the main interlacing nozzle with the pre-interlacing nozzle to carry out net making; that is to say, the filaments oiled by the nozzles are directly netted at one time at the original pre-netting nozzle through the main netting nozzle, and the difference between the pressure value of the compressed air adopted in the replaced procedure and the pressure value of the compressed air adopted by the original main netting nozzle is 1%. Due to the arrangement, the effect that the superfine denier few-hole filaments form certain network nodes is ensured, the head lifting operation can be facilitated, the spinnability is greatly improved, and meanwhile, the produced FDY superfine denier few-hole filaments are not fundamentally changed and influenced in the aspects of physical property / appearance, dyeing and the like.

Description

technical field [0001] The invention belongs to the technical field of chemical fiber production, and in particular relates to a continuous production method of FDY superfine denier less-porous fiber. Background technique [0002] FDY ultra-fine denier less porous fiber yarn (FDY: fully drawn yarn) is a fiber used for special purposes such as high density. It is more fluffy and soft to the touch than ordinary fibers, and can overcome the wrinkle and airtightness of natural fibers. However, it also has irreplaceable excellent characteristics such as warmth, mildew, light weight and waterproof. With the continuous derivation of fiber differentiation, the development of new fiber products and the maintenance of spinning conditions are particularly urgent. The flow of the conventional FDY process is as follows: the polyester melt is sprayed out from the micropores distributed on the spinneret at high speed by the spinning metering pump according to the predetermined speed of th...

AI Technical Summary

Problems solved by technology

The flow of the conventional FDY process is as follows: the polyester melt is sprayed out from the micropores distributed on the spinneret at high speed by the spinning metering pump according to the predetermined speed of the process. Then, the tow is slowly cooled through the spinning tunnel and enters the pre-internet nozzle of the winding process. At the pre-internet, the tow is fully entangled to make the oil in the tow more uniform. At the same time, the Excess oil and water on the surface are blown away and collected to reduce coking of excess oil on the hot roller and stretching slippage. Next, let the tow pass through the main network nozzle under the second roller, and make the tow form a network node at the nozzle to increase the unwinding processing capacity of the tow after weaving, and then the tow enters the winding mechanism for continuous winding However, practice has proved that it is very difficult to directly produce FDY ultra-fine denier yarns with the above-mentioned conventional one-step method, especially fine denier less-porous yarns, such as 6D / 6F type FDY. , the network nodes are not enough and the network fastness is low, the tow is easy to diverge, the production spinnability is poor, and it is difficult to achieve mass production

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