Film-coated polyimide needled felt filter bag

CN224270518UActive Publication Date: 2026-05-26JIANGSU FUDING FILTER MATERIAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
JIANGSU FUDING FILTER MATERIAL CO LTD
Filing Date
2025-05-08
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing polyimide filter bags are exposed to acidic gases and corrosive dust for extended periods during waste incineration dust removal, resulting in decreased filtration efficiency and insufficient corrosion resistance.

Method used

A nano-titanium dioxide coating is applied to the surface of the filter bag to form a dense coating with photocatalytic properties, which decomposes harmful gases and blocks corrosive media. At the same time, an antistatic layer and a wear-resistant layer are added between the support layer and the surface layer to enhance the overall performance.

Benefits of technology

It effectively decomposes harmful gases, reduces dust adhesion, extends the service life of filter bags, improves wear resistance and stability, enhances antistatic properties, and protects filter bags from corrosion.

✦ Generated by Eureka AI based on patent content.

Smart Images

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    Figure CN224270518U_ABST
Patent Text Reader

Abstract

The utility model is applicable to the technical field of filter bags, and provides a film-coated polyimide needled felt filter bag which is of a layered structure and comprises a surface layer, the surface layer is made of polyimide fibers, the surface layer is bonded with a supporting layer through a bonding layer, the supporting layer is made of glass fibers, and the surface layer is bonded with the supporting layer through a bonding layer. A protective layer is arranged on the surface of the surface layer and adopts a nano titanium dioxide coating; the surface layer of the polyimide fiber is coated with a layer of nano titanium dioxide coating, efficient photocatalytic performance is achieved, titanium dioxide can generate strong oxidizing substances under irradiation of ultraviolet rays, various harmful gases including sulfur dioxide can be decomposed, and the photocatalytic performance of the polyimide fiber is improved. Meanwhile, the nano titanium dioxide particles can form a compact coating on the surface of the polyimide fiber, so that a corrosive medium is effectively prevented from permeating and contacting the polyimide fiber, and the corrosion of acid gas in the flue gas to the surface layer of the polyimide fiber is delayed.
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