Calendering
Filter cloth is stabilized in preheating machinery. Final surface
finishing and permeability is achieved with high speed calenders -
heated, polished, steel rolls - which press the fabric making the
surface smooth and compact and further "set" the cloth.
QC
Testing
Accurate permeability readings are taken "on the fly" during
the finishing process as the fabric feeds through the calender stack.
The jumbo rolls finally processed in inspection and re rolled into
100 yard packages. A laboratory analysis is made of each roll, including
weight, thread count and permeability and the roll is ticketed with
an individual serial number and released to our warehouse.