Oxidation-resistant high-temperature-resistant polytetrafluoroethylene film covered filter material, and preparation method thereof

Abstract

The invention belongs to the technical field of plastic film, and discloses an oxidation-resistant high-temperature-resistant polytetrafluoroethylene film covered filter material. The oxidation-resistant high-temperature-resistant polytetrafluoroethylene film covered filter material comprise an upper layer, a middle layer, and a lower layer; the upper layer is a polytetrafluoroethylene film layer, the middle layer is a polytetrafluoroethylene binding layer, and the lower layer is a filter material layer. The polytetrafluoroethylene film is mainly prepared from, by weight, 8 to 10 parts of polytetrafluoroethylene, 0.5 to 1.5 parts of an antioxidant, 0.5 to 1.5 parts of triethyl acetyl citrate, 1 to 2 parts of molybdenum disulfide, 2 to 4 parts of lead sulfate tribasic, 1 to 1.5 parts of dibasic lead phosphate, and 1 to 2 parts of polysiloxane. The polytetrafluoroethylene binding layer is mainly prepared from, by weight, 2 to 3 parts of a polytetrafluoroethylene dispersion liquid, 0.5 to 1.5 parts of an anti-aging agent, 1.5 to 2.5 parts of a foaming agent, and 0.5 to 1.5 parts of a thickening agent. The oxidation-resistant high-temperature-resistant polytetrafluoroethylene film covered filter material is high in dedusting efficiency, is long in service life, is high in oxidation resistance, and can be widely used for treatment of high temperature dust.

Description

technical field [0001] The invention belongs to the technical field of plastic films, and in particular relates to an oxidation-resistant and high-temperature-resistant polytetrafluoroethylene film-coated filter material and a preparation method thereof. Background technique [0002] The rapid development of modern industry has brought many material benefits and social benefits to human beings, and at the same time, it has also brought serious harm to the environment on which human beings live, especially in the aspect of massive emission of exhaust gas. In order to protect the living environment of human beings, it is quite necessary to formulate stricter air emission standards, promote more advanced and more efficient dust removal technology, and reduce industrial dust emissions to improve the atmospheric environment. [0003] At present, the flue gas purification system needs to use film-coated filter materials to filter the flue gas. Commonly used film-coated filter mate...

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Problems solved by technology

However, due to the limitations of domestic production equipment and chemical formula, there are still many problems in the service life and use effect of the product, such as: 1. The direct adhesive method is used between the film layer and the filter material layer, and the adhesive strength is not enough, resulting in Shedding phenomenon occurs during operation; 2. Poor thermal stability, the film layer will deteriorate at a high temperature of 240°C and lose adhesion and filtration capacity; 3. Poor oxidation resistance, prone to thermal oxygen degradation reactions, resulting in membrane filtration The material is not corrosion resistant and has a short service life

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