These designs, plus other new or rebuilt conventional fabric configured sections, typically do not drive all the dryers. The dryer fabrics acts as a drive belt for those undriven dryers. Therefore, a dryer fabric is required just to run the section.

Fabric caliper is a concern since the sheet and fabric are traveling together, and they have to make the transition from bending around the dryer to the opposite bend around the bottom roll and back to the dryer many times. Some machines have noted sheet contact area wear on the dryer fabrics and seams, particularly in the later sections. 

The sheet and dryer fabrics are in constant contact throughout the drying process. There is the possibility that a dryer fabric or seam could mark the sheet surface resulting in degraded sheet surface quality. A very smooth, nonmarking fabric and seam are Indispensable. 

Some very sensitive grades have noted a sheet “welting” or drying difference in the area in contact with the dryer fabric seam on some of the vacuum roll machines. It is now generally accepted that this condition is caused by a higher air permeability in the seam area, primarily in the joint, than the rest of the fabric body. Therefore, seam permeability must be close to body permeability. 

Anna
Sales Department
Hebei Defeng Polyester Fiber Co., Ltd
Add: Jingjiu Railway west, wugong town, Raoyang County
TEL: 86-311-67699480
FAX: 86-311-67699480
Website: www.china-polyestermesh.com. 
E-mail:anna@china-polyestermesh.com

Tag: dryer fabrics