A replaceable film-coated filter element for purifying PM2.5 masks and preparation method thereof

Abstract

The invention discloses a replaceable film filter core for a PM2.5 purifying mouth mask and a preparation method of the filter corer. The replaceable film filter core for the PM2.5 purifying mouth mask comprises a first spunbonded nonwoven fabric layer, a melt-blown nonwoven fabric layer, a PTFE (Polytetrafluoroethylene) microporous film layer, an activated carbon nonwoven fabric layer and a second spunbonded nonwoven fabric layer which are combined from top to bottom successively. The film filter core has the beneficial effects that the small aperture and high porosity of a polytetrafluoroethylene microporous film is utilized, and the polytetrafluoroethylene microporous film is compounded with other layers, through multi-layer filtration and adsorptive action, the object of preventing PM2.5 particles from entering a human body is effectively achieved. The film filter core is a thin sheet piece, is extremely light, long in useful service life, good in PM2.5 particle preventing effect, good in air permeability, and designed to be replaceable in use, saves resources, has characteristics conforming to environmental requirements, and is worthy of being produced and popularized.

Description

technical field [0001] The invention relates to a replaceable membrane-covered filter element for purifying PM2.5 masks and a preparation method thereof. Background technique [0002] Since the beginning of this year, as many provinces and cities in my country have experienced persistent heavy smog and the country has paid more and more attention to environmental protection, the newly revised "Ambient Air Quality Standards" have also added PM2.5 monitoring indicators. These have made people pay more and more attention to "PM2.5". [0003] PM, the English full name is particular matter, which is particulate matter. PM2.5 refers to particulate matter with a diameter less than or equal to 2.5 μm in the atmosphere, also known as particulate matter that can enter the lungs. Its particle size is too small to be easily blocked by the respiratory tract. After being inhaled into the human body, it will directly enter the bronchi and alveoli, interfere with the gas exchange in the l...

AI Technical Summary

Problems solved by technology

At the same time, the particle size of PM2.5 is small, and its surface is easy to contain a large amount of toxic and harmful substances, and it stays in the atmosphere for a long time, and the transportation distance is long, thus causing various health threats to the human body.

[0004] With the rapid growth of my country's economy, the high concentration of PM2.5 particles in the air in many regions has become an objective reality. In order to deal with PM2.5 pollution, the public has shown great enthusiasm for masks, but the current market is especially for There are not many masks for this kind of ultra-fine particle protection. Most of the existing masks on the market are made of non-woven fabrics, gauze, plastic mesh, etc., and their weaving holes or meshes are relatively large. Some fine particles or smoke can pass through the mask and enter the nasal cavity

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