Air filter manufacturers introduce you to several common materials of filter cotton

Air filter manufacturers introduce you to several common materials of filter cotton

Air filter manufacturers introduce you to several common materials of filter cotton

Filter cotton can be divided into G1, G2, G3, G4, F5 grades according to the filtration efficiency, and according to different materials, it can be divided into 4 types: synthetic fiber filter cotton, non-woven filter cotton, glass fiber filter cotton, and activated carbon filter cotton. Below we will separately explain the properties and applications of these 4 different materials of filter cotton.

　　 One, synthetic fiber filter cotton

　　 can fully replace the full range of non-woven fabrics and glass fiber covering coarse, medium and high-efficiency filtration products under the general filtration environment. It is an emerging filter material and the main development direction of future filter materials. Compared with other filters of the same level, it has the advantages of low resistance, light weight, large capacity, environmental protection (can be incinerated), and moderate price. It uses (polyester fibre) as the main raw material, abbreviated as PET. Polyester fibre is made of polyethylene terephthalate, also known as synthetic fibre or polyester. The specific gravity of polyester fiber is 1.38; the melting point is 255～260℃, and it starts to bond at 205℃, and the safe ironing temperature is 135℃; the water absorption is poor, only 0.4%; the breaking strength of filament is 4.5～5.5 g/denier , Short fiber is 3.5～5.5 g/denier; filament elongation at break is 15～25%, short fiber is 25～40%; high-strength fiber strength can reach 7～8 g/den, elongation is 7.5～ 12.5%. Polyester has excellent wrinkle resistance, elasticity and dimensional stability, good electrical insulation properties, resistance to sunlight, abrasion, mildew and moths, good resistance to chemical reagents, and resistance to weak acids and weak alkalis. The industry name is: chemical fiber. Chemical fiber is divided into large chemical fiber and small chemical fiber. Large chemical fiber refers to polyester fiber produced from high-quality PET chips. Small chemical fiber refers to the fiber produced by some small and medium-sized manufacturers from recycled PET chips with poor quality recycled materials.

　　 2. Non-woven filter cotton

　　The scientific name of polyester fiber is commonly known as non-woven fabric. Non-woven fabric has technical characteristics such as wide use, technical maturity, and good stability. It is a typical filter material for my country's current primary and medium-efficiency plate and bag filters. The manufacturing process is made by melt-blown, needle punch, spunlace, spunbond and other processes through multiple processes. Compared with other filters of the same level, it has stable quality, larger dust holding capacity, strong moisture resistance, long service life, and economical Durable and other advantages. Non-woven fabric is also a filter material that has been applied early. The technology is mature and the production cost is low. In recent years, due to the continuous progress of technology, the emergence of composite non-woven fabrics has greatly improved the image of non-woven fabrics in terms of low-cost and low-grade efficiency. Achieve sub-high efficiency. At the same time, the composite non-woven filter material can also be used for filtering in places where air cleanliness is relatively high.

　　 Three, glass fiber filter cotton

　　Glass fiber filter cotton is mainly made of glass fibers of various thicknesses and lengths through special processing technology. Glass fiber is characterized by its stable performance, high temperature resistance, high efficiency, large capacity, and long service life. And in some special environments, only wave lines can do the job. It is widely used in primary effect filters, high temperature resistant filters and high efficiency filters of general ventilation systems, and in places and environments with high air filtration requirements.

　　 Four, activated carbon filter cotton

　　The characteristic of activated carbon is to remove peculiar smell in the air. Activated carbon filter cotton refers to synthetic fibers that have been treated with carbon and glue. Because the role of activated carbon is to remove odors, the filtration efficiency is not emphasized. In use. Generally, it must be used with independent primary and medium-efficiency filters.