The filter belt frame material is made of polyester fabric with excellent performance, which has the characteristics of high strength, acid and alkali resistance, heat resistance, and oil resistance. The most notable feature is the small elongation at constant load and it is not easy to deform. The size is stable, operate well in the machine, and it will not stretch in future production. The upper part of the rubber filter belt is constructed with rows of grooves as a drainage belt; there are many drainage holes in the middle of the groove, which can collect liquid in the vacuum box. The drainage hole is made of pure glue, which blocks the risk of reducing the service life of the filter belt caused by the layering of the filter belt due to the penetration of acid and alkali liquid through the fabric. The material of the rubber filter belt is determined according to the nature of the transport material. It can also design perforated areas without fabric according to customer needs.