Patent ID: 7631669
Filing Date: 2009-12-15
Classification: D21F

Abstract:
1. A multilayer warp bound paper machine clothing or fabric with resistance to edge curling, said paper machine clothing comprising: a system of machine-direction (MD) yarns and a system of cross-machine direction (CD) yarns, said yarns of said system of MD yarns being interwoven with said yarns of said system of CD yarns to form said paper machine clothing, at least some of said MD yarns being used as binding yarns to connect the layers of the paper machine clothing, wherein said system of CD yarns comprises a plurality of CD yarns being made of a material which counters edge curling when the paper machine clothing is placed under load and said plurality of CD yarns are positioned in the fabric such that a strong contractive force offsets tension forces generated when the fabric is placed under load and which typically result in an edge curl, wherein said plurality of CD yarns comprise yarns made of a copolymer blend of polybutylene terephthalate (PBT) and polyethylene terephthalate (PET) in the amounts of 60%-90% and 10%-40% respectively by weight.