Polytetrafluoroethylene fibre and glass fibre combined nonwoven filtering felt and preparation method thereof

Abstract

The invention relates to a non-woven filter felt combined by air net forming and prickling reinforcement and compounded by polyfluortetraethylene fiber and glass fiber. The non-woven filter felt has a layered structure, the middle layer is provided with high-strength low stretching base cloth, and the upper surface and the lower surface of the high-strength low stretching base cloth are symmetrically adhered with fiber surface layers. Manufacturing steps comprise manufacturing of a surface air forming net, manufacturing of a base layer, manufacturing of a prickling felt, soaking, calendaring, coating, preliminary drying, curing and solidifying, trimming, winding, product finishing. The non-woven filter felt has the advantages of improvement on the service life of the filter felt by adopting an air net-forming fiber surface layer to replace a carding net-forming fiber surface layer of a carding machine, high filter efficiency, high physical and mechanical properties, economic cost, even and smooth surface, little fiber damage ratio and evener net formation.

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 the PTFE fiber filter material in the organic chemical fiber, in the traditional carding method, the PTFE fiber shows a generation after carding. It has a lot of static electricity, it is very difficult to transfer into a web and the uniformity of the web is very difficult, and the fiber has a large damage rate after opening and carding, and the electrostatic performance is relatively large. It is necessary to add a certain amount of antistatic agent during production. At the same time, the fiber needs to be It is placed in a stainless steel round pass for 10 to 48 hours in balance. It is troublesome to make, and the filtration performance and service ...

AI Technical Summary

Problems solved by technology

[0002] At present, the filter material for bag filter is mainly produced by conventional acupuncture method, but for the polytetrafluoroethylene fiber filter material in the organic chemical fiber, in the traditional carding method, the polytetrafluoroethylene fiber shows a generation after carding. It has a lot of static electricity, it is difficult to transfer into a web and the uniformity of the web is very difficult, and the strength of the fiber after opening and carding is relatively large, and the electrostatic performance is relatively large. A certain amount of antistatic agent needs to be added during production. At the same time, the fiber needs to be It is placed in a stainless steel round pass for 10 to 48 hours. It is troublesome to make, and the filtration performance and service life of the product after making are still not ideal.

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