Drainage Index was conceived and it worked quite well with polyester mesh fabric. But because it also uses CFM as part of the equation, it fails to be a good indicator of drainage on multilayer fabrics.It is due to the influence of the center and bottom planes on these structures as discussed under CFM.

The polyester wire fabric is composed of warp and weft.Warp is a textile term used to describe the group of yarns that the paper maker knows as the machine direction yarns. Weft is a textile term to describe the group of yarns that the paper maker knows as the cross machine direction yarns.  It is for this reason that paper maker machine are steering away from it use in the selection of polyester mesh fabrics. 

The drainage Index for polyester mesh fabric is a textile term to describe the number of different lift sequences the weaving loom has to make for each pattern repeat. The higher the number, the more difference sequences of lifts that has to be made before it is repeated in paper making process. 
Coco Qin
Sales Department
Hebei Defeng Polyester Fiber Co., Ltd
Add: Wugong Town West Raoyang County Hebei Province China
TEL: 0086-311-67699480
FAX: 0086-311-67699480
EAMIL: coco@china-polyestermesh.com 
Website: www.china-polyestermesh.com
Tag:polyester mesh fabric,polyester wire fabric