Polyethersulfone (PES) filter membrane is made of polyethersulfone superfine fibers hot-melt and bonded together. 
It is a kind of membrane material for deep filtration. 
There is no additive in the whole process; it is physically and chemically stable. 
It has good compatibility; it has a series of pore diameters, large porosity, large pollution resistance, can be recoiled and high-temperature sterilization; good pressure resistance. 
It has extremely low adsorption to protein and can withstand high temperature of 300°C.