English 
Composite material is a new material which is made by using advanced material preparation technology to optimize the composition of different materials.
Why use air filtration composites? Air filter refers to the device of air filtration, which mainly includes five types: coarse efficiency filter, medium efficiency filter, high efficiency filter, sub high efficiency filter and high efficiency filter.
Non woven fabrics and spunbonded fabrics are subordinate. Non woven fabric is a kind of fabric formed without spinning and weaving.
