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What is the difference between non-woven filter cotton and primary filter cotton


In the air filtration industry, there is a series of filter cotton, and in the series of filter cotton, there is a primary filter cotton and a kind of filter cotton called non-woven filter cotton, what is the difference between these two kinds of filter cotton?

Primary filter cotton. 

The synthetic fiber filter material with step-by-step increase in density has the advantages of economy and practicality, low initial resistance, high dust capacity, elasticity, safety and environmental protection, and easy to use. this series of products are mainly used for pre-filtration of purification system and are the most commonly used in air purification and filtration. the most common filter material is to filter ≥ 5 μ m particulate dust and suspended matter in the atmosphere. 

(polyester fiber polyester fibre) as the main raw material, abbreviation: PET, polyester fiber is made of polyethylene terephthalate, also known as synthetic fiber or polyester.

Primary filter cotton

Non-woven filter cotton. 

Non-woven filter cotton scientific name polyester fiber, commonly known as non-woven fabric, non-woven fabric has the technical characteristics of extensive use, technical maturity, good stability and so on. It is a typical filter material for primary and medium-effect plate and bag filters in China. The manufacturing process is made by melt blown, acupuncture, spunlacing and other processes. Compared with other filter materials of the same grade, it has the advantages of stable quality, large dust holding capacity, strong moisture resistance, long service life, economy and durability, etc. Non-woven fabric is also the earliest filter material, with mature technology and low production cost. in recent years, due to the continuous progress of technology, the emergence of composite cotton has improved the low-grade image of non-woven fabric. Sub-high efficiency has been achieved in terms of efficiency. At the same time, the composite non-woven filter material can also be used in places with relatively high air cleanliness requirements.

Non-woven filter cotton

Excluding paper and woven fabrics, knitted fabrics, tufted fabrics, stitched fabrics with stitched yarns and wet tapestry products (whether or not they are needle-punched). 

Fibers can be natural or chemically processed, short fibers, filaments or fibers formed on the spot. 

The difference between primary filter cotton and non-woven filter cotton. 

In the general filtration environment, the primary filter cotton can completely replace the non-woven filter cotton, it is a new filter material, and it is also the main development direction of the filter material in the future. Compared with other filter materials of the same grade, it has the advantages of low resistance, light weight, large capacity, environmental protection (incinerable), moderate price and so on.

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