Non-woven filter felt combining air-laid web with pinprick reinforcement and production method

An air-laid and non-woven technology, applied in the field of filter felt, can solve the problems of high fiber damage rate, unsatisfactory filtration performance and service life, etc., and achieve high physical and mechanical properties, high tensile strength and low running resistance.

Active Publication Date: 2009-09-16
SHANGHAI BG INDAL FABRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002]At present, the filter material for bag filter is mainly produced by conventional needle punching method, but for glass fiber material filter material, due to the fiber damage during the traditional feeding process The efficiency is relatively large, and the filtration performance and service life of the manufactured products are not ideal.

Method used

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  • Non-woven filter felt combining air-laid web with pinprick reinforcement and production method
  • Non-woven filter felt combining air-laid web with pinprick reinforcement and production method
  • Non-woven filter felt combining air-laid web with pinprick reinforcement and production method

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Experimental program
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Effect test

Embodiment 1

[0040] This embodiment is made through the following steps as a nonwoven felt combined with air-laid and needle-punched reinforcement and its manufacturing method:

[0041] Step 1. Fabrication of the base fabric—weaving the glass fiber yarn into a high-strength and low-stretch base fabric;

[0042] Step 2. Fabrication of surface layer—mix glass fiber and P84 fiber at a ratio of 7:3, and then air-laid to make a fiber surface layer.

[0043] Among them, the air-laid process adopts the air flow to transport the fibers to form a uniform fiber web with disorderly arrangement of fibers. Under the joint action of the airflow, the fibers fall off from the sawtooth, and are evenly transported by the airflow to condense on the mesh curtain, forming a three-dimensional distribution, and a fiber web with small vertical and horizontal strength differences.

[0044] The specific air-laid process steps are as follows:

[0045] (1) Opening

[0046] (2) Removal of impurities

[0047] (3) M...

Embodiment 2

[0081] This embodiment is basically the same as Embodiment 1, except that the fiber surface layer adopts a P84 superfine fiber layer. For special industrial and mining conditions, the air-laid method has been developed to make ultra-fine fiber surface layers, such as: P84 ultra-fine fiber surface layer, P84 and PTFE fiber composite ultra-fine surface layer, P84 and PPS fiber composite ultra-fine surface layer, etc., to achieve surface Combined with deep filtering. The weight of the microfiber surface layer is 80g / m 2 ~150g / m 2 .

[0082] The ratio of ultra-fine surface layer fibers is shown in Table 7:

[0083]

[0084] Needle-punched felt production--stack two layers of fiber surface layers and glass fiber base cloth, the glass fiber base cloth is located in the middle of the fiber layer, and then attach an ultra-fine surface layer on the upper surface of the fiber layer, and then form it by needle punching felt.

[0085] The acupuncture process parameters are shown i...

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Abstract

The invention provides a non-woven filter felt combining air-laid web with pinprick reinforcement, wherein, the non-woven filter felt has a layered structure, the intermediate layer is high-tenacity and low-elongation type base cloth, and the upper surface and the lower surface of the high-tenacity and low-elongation type base cloth are symmetrically glued with a fiber surface layer or an extra fine fiber surface layer. The production method essentially comprises the technology of producing the surface layer air-laid web: producing the base cloth; producing the needled-punched felt; impregnating; calendering; coating; preliminary drying; solidifying in a way of curing; trimming; winding; and finishing a product. The invention has the advantage that the technology combining the air-laid web with the pinprick reinforcement is used for producing the non-woven filter felt, thereby combining the respective advantage of the two technologies, improving the service life of filter materials, and having high filtration efficiency, high physical and mechanical properties, as well as low cost. Compared with the normal method for filtrating materials with needle punching, the invention can obviously improve the wearing resistance, the fold-resistance capability and the tensile strength, and can bear hyperfiltration load, wherein, the filtering rate can reach more than 1.0 m/min, and the running resistance is low.

Description

technical field [0001] The invention relates to a filter felt, in particular to a filter felt used for flue gas and dust control, and also to a manufacturing method of the filter felt. Background technique [0002] At present, the filter material for bag filter is mainly produced by conventional needle punching method, but for glass fiber filter material, due to the high fiber damage rate in the traditional process of conveying and forming into a web, the filtration performance and service life of the produced product are not ideal. Contents of the invention [0003] The technical problem of the present invention is to provide a non-woven filter felt made of a combination of air-laid and needle-punched reinforcement, which combines the respective advantages of the two processes. Compared with the filter felt produced by the traditional needle punching process, the surface is more uniform and flat, the fiber damage rate is small, the physical and mechanical properties are s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14B32B5/26D04H1/72D04H1/498D04H1/732
Inventor 刘书平
Owner SHANGHAI BG INDAL FABRIC
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