Patent ID: 8192583

Claim:
A papermaking process belt comprising: an integrated structure of a reinforcing fibrous base material and a polyurethane layer, the reinforcing fibrous base material being embedded in the polyurethane, wherein one part of the polyurethane or all of the polyurethane is formed by heat curing of a curable urethane composition comprising: a urethane prepolymer which is obtained by reacting an aromatic isocyanate compound with polyol and has a terminal isocyanate group, a curing agent having an active hydrogen group, and 0.3 to 25% by weight of a nano inorganic filler which has an average particle size of 1 to 800 nanometers (nm) and which is a calcined kaolin clay comprising 50% by weight or more of a silicon oxide (SiO 2 ) component, wherein the moisture content of the calcined kaolin clay is 1% by weight or less, and the surface of the calcined kaolin clay is treated with an organic silane coupling agent.