(1) PP(polypropylene)fiber filter material , the filter efficiency from 85% to 99.999% , it can be used for filter bag,mask,respirator,medium and high efficiency filter.Acid and alkali resistant,melting point:167-174 centigrade. (2) Synthetic fiber filter material, filter efficiency from 15% to 90% for 1 micron, 35% to 90% for 2 micron,45% to 95% for 5 micron, can be used for plate filter,plate/spiral-wound filters,sprial-wound filter.oil filtration,dust collector bag. Well flame retardant,fire protection grade: U12. thickness: 3--20mm,max width: 2000mm (3) Composite filter material (double layer), compounded by polypropylene,polyester and spunbonded fabric. filter efficiency from 35% to 95% for 0.5 micron, 60% to 98% for 1 micron,85% to 99% for 2 micron, can be used in bag and plate filters,etc. max width:720mm. (4) Composite filter material (single layer), compounded of polypropylene super-fine fiber nonwovens and polyester nonwovens by ultrasonic press-point. The filter efficiency from 35% to 90% for 0.5 micron,60% to 98% for 1 micron,85% to 99% for 2 micron.