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Method for preparing polysulfonate microporous fibre non-woven fabric

A technology of non-woven fabrics and polysulfones, applied in the field of preparation of microporous fiber non-woven fabrics, which can solve the problems of high processing temperature, low solubility, unfavorable microcellular foaming, etc., and achieve the effect of high tensile strength

Inactive Publication Date: 2012-05-09
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, since polysulfone non-woven fabric is a relatively special polymer aggregate, it has high processing temperature, low melt strength at high temperature, and low solubility of supercritical fluid in it, which is not conducive to microcellular foaming. Therefore, whether the method of melt-blown nonwoven fabric of supercritical fluid can be used to prepare polysulfone microporous fiber nonwoven fabric is a topic of great concern to those skilled in the field of nonwoven fabric production.

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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  • Method for preparing polysulfonate microporous fibre non-woven fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The solid chips of polyarylsulfone resin are fed quantitatively to the screw, and the solid chips of polysulfone resin are conveyed and preheated in the screw feeding section, and then compacted and gradually melted in the screw compression section. In the screw melting section, supercritical fluid N with a temperature of 50-380°C and a pressure of 7-40MPa 2 Inject into the polysulfone melt through the injection device, supercritical N 2 The mass ratio to polysulfone polymer is 1:250-1:100 to form a homogeneous polysulfone melt. In the filter section, the homogeneous polysulfone melt should pass through the filter medium to filter out impurities and catalyst remaining after polymerization. In the part of the metering pump, the homogeneous polysulfone melt is metered (10-500000g / h) by the gear metering pump to precisely control the fineness and uniformity of the fibers. Such as figure 1 As shown, the arrow A in the figure indicates the injection direction of the homog...

Embodiment 2

[0033] The solid chips of polyarylsulfone resin are fed quantitatively to the screw, and the solid chips of polysulfone resin are conveyed and preheated in the screw feeding section, and then compacted and gradually melted in the screw compression section. In the melting section of the screw, the supercritical fluid N with a temperature of 50°C and a pressure of 7MPa 2 Inject into the polysulfone melt through the injection device, supercritical N 2 The mass ratio of polysulfone polymer to polysulfone polymer is 1:250 to form a homogeneous polysulfone melt. In the filter section, the homogeneous polysulfone melt should pass through the filter medium to filter out impurities and catalyst remaining after polymerization. In the part of the metering pump, the homogeneous polysulfone melt is metered (10-500000g / h) by the gear metering pump to precisely control the fineness and uniformity of the fibers. Such as figure 1 As shown, the arrow A in the figure indicates the injection d...

Embodiment 3

[0035] The polysulfone resin (polyethersulfone) solid chips are quantitatively fed to the screw, and the polysulfone resin solid chips are conveyed and preheated in the screw feeding section, and then compacted and gradually melted in the screw compression section. In the screw melting section, supercritical fluid N with a temperature of 260°C and a pressure of 20MPa 2 Inject into the polysulfone melt through the injection device, supercritical N 2 The mass ratio with polysulfone polymer is 1:150 to form a homogeneous polysulfone melt. In the filter section, the homogeneous polysulfone melt should pass through the filter medium to filter out impurities and catalyst remaining after polymerization. In the part of the metering pump, the homogeneous polysulfone melt is metered (10-500000g / h) by the gear metering pump to precisely control the fineness and uniformity of the fibers. Such as figure 1 As shown, the arrow A in the figure indicates the injection direction of the homog...

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

A method for preparing a polysulfonate microporous fibre non-woven fabric is disclosed, which comprises the following steps of: quantitatively feeding polysulfonate solid slices in a screw, compacting by the contraction section of the screw, and gradually melting; injecting a supercritical fluid in a melt via an injection device at the fusion section of the screw, so as to form a homogeneous-phase polysulfonate melt; passing the homogeneous-phase polysulfonate melt through a filter medium at a filter part; metering the homogeneous-phase polysulfonate melt via a gear metering pump at a metering pump part; extruding the homogeneous-phase polysulfonate melt from a spinneret orifice at a die head through a melt-blowing die head inlet area, an orifice flow area and a bulking area to form superfine microporous fibres; and blowing the drafted and cooled-solidified polysulfonate superfine microporous fibres to a grid-flocculating curtain or a rotary drum under the function of a drafting airflow, collecting the fibres on the grid-flocculating curtain or the rotary drum via a vacuum suction device disposed on the lower part of the grid-flocculating curtain or in the rotary drum, and forming a polysulfonate microporous fibre non-woven fabric by the thermal bonding of the fibres or other reinforcing methods.

Description

technical field [0001] The invention relates to a method for preparing microporous fiber non-woven fabrics by using supercritical fluid melt blown spinning. Background technique [0002] Polysulfone nonwoven fabric is a kind of special thermoplastic nonwoven fabric with high temperature resistance, which has excellent comprehensive properties, such as heat resistance, oxidation resistance, hydrolysis resistance and flame retardancy, etc. It is widely used in electrical, electronic, mechanical , medical, chemical, food and aerospace fields. [0003] Supercritical fluid refers to a fluid with unique physical properties different from liquid or gas above the critical temperature and critical pressure of a certain substance. It has both the characteristics of gas and the characteristics of liquid. Therefore, it can be said that supercritical fluid It is the third fluid that exists outside the two fluid states of gas and liquid. Supercritical fluid has a density close to that o...

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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Patent Type & Authority Applications(China)
IPC IPC(8): D04H3/009D04H3/02D01D1/04
Inventor 张迎晨张夏楠吴红艳
Owner ZHONGYUAN ENGINEERING COLLEGE
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