Polyester fully-drawn slub yarn and preparation method thereof

A technology of slub yarn and polyester, applied in the direction of single-component polyester artificial filament, filament generation, filament raw material melting, etc., can solve the problems of high cost, low speed, low output, etc., and achieve the thickness ratio Larger, improved output and quality, improved product quality and added value

Inactive Publication Date: 2012-12-19
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the process is one-step production, it is beneficial to reduce production costs, but its spinning speed is only about 3000m / min, which is low in speed, low in output and high in cost. Therefore, the production process needs to be improved urgently

Method used

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  • Polyester fully-drawn slub yarn and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The spinning process flow of this embodiment is: drying of polyester chips→adding dry chips and additives to the screw for melting→spinning box→metering pump→spinning assembly→melt extrusion→cooling and forming→oiling→drawing→ Heat setting→winding forming→preparation of polyester fully stretched thick and thin slub yarn. In the spinning equipment, the polyester chip melt spinning method is adopted, which is based on the production of conventional FDY equipment, including drying, screw melt extrusion devices, additive injectors installed on the feed inlet of the screw melt extrusion devices, spinning box Body, metering pump, spinning assembly, spinneret spinning device, and a ring blowing cooling device is installed under the spinneret; the winding forming device includes the first and second drafting rollers, pre-netting device and winding machine, The secondary pre-coiler is placed in the middle of the first drafting roll and the second drafting roll, and a 4600m / min-5...

Embodiment 2

[0033] This example provides a method for preparing 110dtex / 36f polyester fully stretched thick and thin slub yarns in one step. The production process parameters and performance indicators are: the intrinsic viscosity of polyester chips is 0.648dl / g, the online addition of polymethyl methacrylate additives in melt spinning is 1.1% of the mass fraction of polyester raw materials, and a 6-stage screw is used Melt extrusion process, the temperature of the 6-stage screw is 281±2°C, 287±2°C, 290±2°C, 292±2°C, 291±2°C and 291±2°C; the spinning temperature is 290°C, and the ring blowing The wind pressure is 40Pa, the ambient blowing temperature is 21°C, the speed of the first hot roller is 1750m / min, the temperature of the first hot roller is 82°C, the temperature of the second hot roller is 123°C, and the stretching speed is 4700m / min. The fully stretched thick and thin slub yarns have uniform and random distribution of thick and thin slubs in the length direction of the fiber axis...

Embodiment 3

[0035] This example provides a method for preparing 110dtex / 36f polyester fully stretched thick and thin slub yarns in one step. The production process parameters and performance indicators are: the intrinsic viscosity of polyester chips is 0.648dl / g, the online addition of polymethyl methacrylate additives / additives in melt spinning is 1.5% of the mass fraction of polyester raw materials, and 6 The temperature of the six-stage screw is 281±2°C, 287±2°C, 290±2°C, 292±2°C, 291±2°C and 291±2°C; the spinning temperature is 290°C, The air pressure of the ring blowing is 50Pa, the temperature of the ring blowing is 21°C, the speed of the first hot roll is 1800m / min, the temperature of the first hot roll is 84°C, the temperature of the second hot roll is 129°C, and the stretching speed is 4800m / min. Polyester fully stretched thick and thin slub yarns have uniform and random distribution of thick and thin slubs in the length direction of the fiber axis. The knot density is 5-15 piec...

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Abstract

The invention discloses a polyester fully-drawn slub yarn and a preparation method thereof. On the basis of not changing the conventional FDY (fully-drawn yarn) production device, the polyester fully-drawn slub yarn is produced by using a one-step method implemented through adding a polymethyl methacrylate additive (mass percentage: 0.5-3.0%) into a polyester chip and then carrying out drawing on an obtained mixture at a drawing speed of 4600-5000m / min. The radial fineness ratio of the obtained slub yarn is 1.20-1.60 / l, the length of a thick section of the slub yarn is 15-40mm, and the slub density is 5-15 / m; and the breaking strength is 2.70-3.40 cN / dtex, and the breaking elongation is 40-80%. The polyester fully-drawn slub yarn prepared by using the technical scheme of the invention has the characteristics of high output, low cost, good quality, stable performance, high added values of products, and obvious price-performance advantages, and achieves the purposes of energy conservation, emission reduction, environmental protection, clean production and benefit incensement.

Description

technical field [0001] The invention belongs to the technical field of functionally differentiated fibers, in particular to a polyester fully drawn (FDY) slub yarn and a preparation method thereof. Background technique [0002] Polyester fully stretched thick and thin slub yarn is a new type of functionally differentiated fiber with linear density thickness ratio difference and other potential characteristics along the fiber axis direction. Among them, the ratio of the highest linear density to the lowest linear density in the fiber is called thickness ratio , and the thickness ratio is moderate, and the thickness and details are uniformly distributed or randomly distributed; the characteristic of the slub filament is that the same fiber has a supramolecular structure with different orientation and crystallinity in the fiber axis, and the orientation and crystallinity of the thick nodes are usually different. Low, high degree of detail orientation and crystallinity. Therefo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F1/10D01D1/04D01D5/092D01D11/00D01D7/00
Inventor 管新海
Owner SUZHOU UNIV
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