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Preparation method of hollow polyester fiber with controllable hollowness

A polyester staple fiber, hollow technology, applied in hollow filament manufacturing, fiber processing, fiber chemical characteristics, etc., can solve the problems of inability to improve hydrolysis efficiency, fiber cost increase, energy waste, etc., and achieve significant moisture absorption and perspiration. The effect of reducing fiber cost and improving hydrolysis efficiency

Inactive Publication Date: 2012-05-16
SHANGHAI VITA SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the hydrolysis time is too long, it will cause unnecessary waste of energy, and the concentration of the alkali solution is too high, which will cause great pollution to the environment, and the waste water needs to be treated, resulting in a significant increase in fiber costs.
Since PP is not compatible with the special modified copolyester of Copolyester, it is also impossible to improve the hydrolysis efficiency by changing the physical structure of the fiber
In addition, although the prepared PP hollow fiber has the advantages of light weight and good heat retention, its dyeing performance is extremely poor and the wearability is not high.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 30% polyester and 5% water-soluble polyester are input into the skin layer screw extruder, and 65% water-soluble polyester is input into the core layer screw extruder, wherein the ratio of polyester and water-soluble polyester forming the skin layer is 75:25, for compound melt spinning, the metering pumps are respectively metered and then input into the spinning box (spinning box 290°C), extruded through the composite spinning spinneret, cooled by blowing and oiled, and rolled after the integrated tow Winding (speed 1400m / min), two-stage drafting after clustering, first-stage drafting (drawing temperature 88°C, drafting ratio 3.5 times), secondary drafting (drawing temperature 100°C, drafting ratio 1.1 times) ), relaxation heat setting (temperature 125 ℃, 60min), packing after cutting and making short fibers. After the fibers obtained by the above process are made into fabrics, they are subjected to an alkaline solution with a concentration of 2g / L and a temperature of ...

Embodiment 2

[0015] 75% polyester and 5% water-soluble polyester are input into the skin layer screw extruder, and 20% water-soluble polyester is input into the core layer screw extruder, wherein the ratio of polyester and water-soluble polyester forming the skin layer is 94:6, for compound melt spinning, the metering pumps are respectively metered and then input into the spinning box (spinning box 290°C), extruded through the composite spinning spinneret, cooled by blowing and oiled, and rolled after the integrated filament bundle Winding (speed 1400m / min), two-stage drafting after clustering, first-stage drafting (drawing temperature 88°C, drafting ratio 3.5 times), secondary drafting (drawing temperature 100°C, drafting ratio 1.1 times) ), relaxation heat setting (temperature 125 ℃, 60min), packing after cutting and making short fibers. After the fibers obtained by the above process are made into fabrics, they are subjected to an alkaline solution with a concentration of 2g / L and a temp...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention relates to a preparation method of hollow polyester fiber with controllable hollowness. In the method, two screw extruders are used for respectively feeding materials for a cover / core spinneret plate assembly, a cover layer which is made of polyester and water-solubility polyester and a core layer which is water-solubility polyester are melted in a certain proportion for composite spinning, and then postprocessing processes are carried out to prepare polyester staple fiber; and fabric made of the obtained fiber is treated with an alkaline solution to remove the water-solubility polyester from the core layer and the cover layer, and thus the fiber is of a hollow structure, and lots of micropores, trenches and through holes are formed on inner and outer surfaces of the fiber at the same time. Since hollow holes are formed after the core layer is removed through melting, deformation of hollow holes, caused by extrusion in a stretching process in the preparation of hollow fiber spun with a profile hole spinneret plate spinning method, can be avoided, and hollowness is reduced; and moreover, through the change of the proportion of raw materials for spinning, the polyester fiber with controllable hollowness being 5-75% is prepared.

Description

technical field [0001] The invention relates to a method for preparing hollow fibers, in particular to a method for preparing microporous hollow polyester staple fibers with controllable hollowness Background technique [0002] Hollow fiber is an important special-shaped fiber with a cavity along the axial direction in the cross section. Its hollow structure contains a large amount of still air, which makes the fabric lighter and warmer than ordinary homogeneous fabrics to a certain extent. improvement. The production of hollow fiber is mainly made by melt spinning by adopting arc-shaped, C-shaped, multi-point-shaped and other special-shaped spinnerets. The hollow fiber is spun by the special-shaped spinneret spinning method. During the production process, the stretching tension will cause the extrusion deformation of the hollow hole of the fiber, and the mechanical action generated during the subsequent processing will also cause the fiber to be further squeezed. It is di...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D01D5/24D01D5/34D01D5/08D01D5/12
Inventor 赵茂成张娜张欣钱君杰
Owner SHANGHAI VITA SCI & TECH
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