Strengthening extended diaphragm base for paper making

Application Number: 00108542
Application Date: 2000.05.17
Publication Number: 1274027
Publication Date: 2000.11.22
Priority Information: 1999/5/18 US 09/314,727
International: D21F3/02;D21G1/00
Applicant(s) Name: Albany International Corp.
Inventor(s) Name: Erick R. Romanski
Patent Agency Code: 11038
Patent Agent: sun zheng
Abstract A resin-coated endless belt for a long nip press has a base which is a polymeric film structure in the form of an endless loop with an inner surface, an outer surface, a transverse direction and a longitudinal direction. The polymeric film structure has a plurality of perforations which may be aligned in one or both of these directions. The polymeric film structure is stretched in the presence of heat to orient the molecular chains in the unperforated intervals between the perforations to provide the structure with tenacity. At least the inner surface of the base is coated with a polymeric resin material, such as polyurethane. The polymeric resin material coats the base and upon curing, forms a mechanical interlock therewith by virtue of the perforations, and renders it impermeable to oil and water.