polyester forming fabric can be divided into 4-shed, 5-shed, 7-shed, 8-shed, 16-shed, 24-shed etc. According to the category, it can be divided into single layer fabric, double layer fabric, two-and a half layer fabric and three-layer fabric. 7-shed double layer fabric is suitable for quality printing paper and tissue paper etc. Model of fabricModelThread Diameter (mm)Density (thread/cm)Intensity (N/cm)Thickness mmAir Permeability m3/m2hh 571770.170.17/0.22 0.22(t66)65.749.6≥800≥6000.6354550