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. 8-shed double layer fabric is suitable for quality printing paper, tissue paper and the surface pulp and inner pulp of the board paper etc.