Air filter material containing active carbon and production method thereof

Abstract

The invention discloses an air filter material containing active carbon and a production method thereof. The filter material is at least composed of an upper non-woven fabric layer, a lower non-woven fabric layer and an intermediate sandwiched active carbon layer, wherein the active carbon layer contains more than 5 wt% of active carbon particles treated by acidic and / or alkali substances. The air filter material containing active carbon in the invention has a high removal rate in removal of acidic and alkaline gas and composite gas thereof, maintains good removal efficiency in removal of organic gas at the same time and can be used in filtration fields like automobiles, household purifiers, clean rooms, etc.

Description

Technical field [0001] The invention relates to an air filter material containing activated carbon and a production method thereof. Background technique [0002] With the densification of buildings and the rapid increase in the number of cars, the emission of complex volatile harmful gases in the air has increased. At present, most of the active carbon non-woven filter materials produced in general industry have a relatively low adsorption rate, which can only remove organic gases, such as toluene, etc., and cannot effectively adsorb acidic or alkaline or complex volatile harmful gases, or partially The adsorbed odor still stays in the activated carbon cavity and cannot be removed even if it will escape again after a period of time. Therefore, the removal rate of common filter materials for odor in the air is not high. [0003] For example, Chinese Patent CN101332385 discloses a filter material with activated carbon particles sandwiched between two layers of non-woven fabrics. Al...

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Problems solved by technology

[0003] For example, Chinese published patent CN101332385 discloses a filter material with activated carbon particles between two layers of non-woven fabrics. Although the filter material can keep intercepting solid particles such as dust, it can only remove the most common organic gases in the air. , unable to remove acidic or alkaline or compound volatile harmful gases

[0004] Another example is that Japanese Patent Application No. 2007-38091 discloses an air filter material, which is a filter material composed of a chemical reaction layer attached with a chemical fiber net and a physical absorption layer containing a physical absorbent. Although activated carbon is also used, the activated carbon has not undergone any treatment and cannot effectively remove acidic or alkaline or compound volatile harmful gases

Moreover, although the filter material is treated with phosphoric acid, it is mainly for enhancing the flame retardant performance and cannot absorb harmful gases in the air.

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