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Fabrication method of needling/spunlace and electrostatic spinning compound filtering material

A technology of composite filter material and manufacturing method, which is applied in the textile field, can solve the problems of low filter membrane strength and difficulty in achieving ultrafine particle filtration efficiency above 99%, and achieve the effects of low resistance, high breaking strength and high filtration efficiency

Active Publication Date: 2013-05-01
孙熙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, filtration technology is used to purify particulate matter in flue gas. The filter materials used are divided into woven filter material and acupuncture / spunlace filter material. In order to further improve its filtration efficiency, woven filter material and needle-punched / spunlace Film coating technology on the filter material. Although the filter material manufactured by these technologies has high strength, it is difficult to achieve a filtration efficiency of more than 99% for ultrafine particles below PM2.5.
At present, although the electrospun filter membranes being developed by various countries in the world have good filtration efficiency for ultrafine particles, the filter membranes produced have low strength and are difficult to be used independently in flue gas purification.

Method used

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  • Fabrication method of needling/spunlace and electrostatic spinning compound filtering material
  • Fabrication method of needling/spunlace and electrostatic spinning compound filtering material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) High-performance filter substrates are prepared by acupuncture or spunlace:

[0022] The high-performance filter material base is composed of three layers: the bottom layer is made of 7dtex polyester fiber, the middle layer is a high-strength polyester base fabric with a breaking strength of 1500N / 5cm in the warp direction and a breaking strength of 1500N / 5cm in the weft direction, and the upper layer is made of 30% by mass, 1.5dtex low melting point polyester fiber and 0.8dtex polyester fiber;

[0023] (2) The surface layer of high-performance polyester filter material is made by electrospinning, and the filtration efficiency of the surface layer of high-performance filter material for 2μm ultrafine particles reaches 99.9%;

[0024] (3) Put the surface layer of the filter material prepared in step (2) on the base of the filter material prepared in step (1), hot rolling and compounding at 250°C, and then heat setting at 180~230°C to make high-performance filter mat...

Embodiment 2

[0027] (1) High-performance filter substrates are prepared by acupuncture or spunlace:

[0028] The high-performance filter material base is composed of three layers: the bottom layer is made of 2.5dtex PPS fiber, the middle layer is a high-strength PPS base cloth with a radial breaking strength of 1200N / 5cm and a transverse breaking strength of 1000N / 5cm, and the upper layer is made of 50% mass fraction, Composition of 1.0dtex low melting point PPS fiber and 1.1dtex PPS fiber;

[0029] (2) Electrospinning is used to prepare high-performance PPS filter material surface layer: the filtration efficiency test of the high-performance filter material surface layer for 2μm ultrafine particles reaches 99.9%;

[0030] (3) Put the surface layer of the filter material prepared in step (2) on the base of the filter material prepared in step (1), hot rolling and compounding at 260°C, and then heat setting at 200~280°C to make high-performance filter material;

[0031] (4) The obtained h...

Embodiment 3

[0033] (1) High-performance filter substrates are prepared by acupuncture or spunlace:

[0034] The high-performance filter base is composed of three layers: the bottom layer is made of 5dtex polyimide fiber, the middle layer is a high-strength polyimide base fabric with a radial breaking strength of 1300N / 5cm and a transverse breaking strength of 1200N / 5cm, and the upper layer is made of Composition of 20% mass fraction, 2.0dtex low melting point polyimide fiber and 2.2dtex polyimide fiber;

[0035] (2) The high-performance polyimide filter material surface layer is made by electrospinning, and the filtration efficiency of the high-performance filter material surface layer for 2μm ultrafine particles reaches 99.99%;

[0036] (3) Place the surface layer of the filter material obtained in step (2) on the base of the filter material obtained in step (1), hot-roll and compound at 280°C, and then heat-set at 250~260°C to make a high-performance filter material;

[0037] (4) The ...

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Abstract

The invention belongs to the technical field of textile, and particularly relates to a fabrication method of a needling / spunlace and electrostatic spinning compound filtering material. The method comprises the steps of fabricating a high-performance filtering material substrate by a needling method or a spunlace method, fabricating a high-performance filtering material surface layer by electrostatic spinning, placing the fabricated filtering material surface layer on the filtering material substrate, compounding by hot rolling at a temperature that is equal to or higher than a melting point of a low melting point fiber within 20 DEG C, and fabricating the high performance filtering material. The warpwise breaking strength of the fabricated high-performance filtering material is greater than or equal to 900N / 5cm, and the weftwise breaking strength of the high-performance filtering material is greater than or equal to 1200N / 5cm. According to the method, the novel high-performance filtering material is fabricated by a high-strength needling / spunlace filtering material and a high-filtration-performance electrostatic spinning fiber layer; the novel high-performance filtering material is high in filter efficiency, low in resistance, and high in breaking strength; the low-melting point fiber is mixed on the upper surface layer of the needling / spunlace filtering material to fabricate a needling / spunlace felt substrate; the felt substrate is compounded with the electrostatic spinning surface layer by the hot rolling; and a stable structure of the filtering material is formed by heat setting.

Description

[0001] technical field [0002] The invention belongs to the technical field of textiles, and in particular relates to a method for manufacturing a composite filter material of acupuncture / spunlace and electrospinning. Background technique [0003] At present, filtration technology is used to purify particulate matter in flue gas. The filter materials used are divided into woven filter material and acupuncture / spunlace filter material. In order to further improve its filtration efficiency, woven filter material and needle-punched / spunlace Film coating technology on the filter material. Although the filter material manufactured by these technologies has high strength, it is difficult to achieve a filtration efficiency of more than 99% for ultrafine particles below PM2.5. At present, although the electrospun filter membranes being developed by various countries in the world have good filtration efficiency for ultrafine particles, the filter membranes produced have low strength...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14B32B7/00B32B5/14
Inventor 孙熙柳静献毛宁常德强
Owner 孙熙
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