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

A technology of polytetrafluoroethylene fiber and glass fiber, which is applied in fiber processing, textiles and papermaking, etc., can solve the problems of unsatisfactory product filtration performance and service life, high fiber strength damage rate, and difficulty in web formation uniformity, etc., to achieve Increased service life, low fiber damage rate, and high physical and mechanical properties

Inactive Publication Date: 2009-08-19
SHANGHAI BG INDAL FABRIC
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  • Abstract
  • Description
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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

Method used

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

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Embodiment Construction

[0030] Such as figure 1 As shown, the present invention provides a non-woven filter mat composed of polytetrafluoroethylene fibers and glass fibers. The upper and lower surfaces of the base cloth 1 are symmetrically pasted with a mixed fiber surface layer 2 .

[0031] The mixed fiber surface layer 2 is a mixed fiber surface layer made by mixing polytetrafluoroethylene fibers and glass fibers at a ratio of 2:3 through an air-laid process.

[0032] The high-strength and low-stretch base fabric 1 is woven into a high-strength and low-stretch base fabric by spinning glass fibers, impregnated with polytetrafluoroethylene emulsion after needle punching; calendered; coated with polytetrafluoroethylene to meet different requirements. Market demand. The base cloth layer mainly plays the role of reinforcement.

[0033] The present invention will be further described below in conjunction with embodiment:

[0034] This embodiment is made through the following steps as a non-woven filt...

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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 ...

Claims

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Application Information

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IPC IPC(8): D06M17/00D06M15/256
Inventor 刘书平
Owner SHANGHAI BG INDAL FABRIC
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