PBT Pleated Filter Cartridge with Polybutylene terephthalate Micro-fiber Media. The PBT pleated filter is made of PBT non-woven media with all PBT support material, which offers high temperature and excellent chemical resistance ability. The multi-layers of PBT melt-blown media provide good performance of liquid filtration and also ensure high flow rate, high dirty holding capacity and low-pressure drop. The PBT pleated filter is suitable for general filtration applications in combined with high temperatures and solvent-based application, which requires high filtration efficiency and high temperature resistance.