Patent ID: 7713458

Claim:
A method of manufacturing a laminated seamless belt which comprises a base layer and an outer layer, comprising the steps of: laminating and extruding simultaneously a melted form of a base layer and a melted form of an outer layer into the shape of a cylinder by using a die, wherein the base layer comprises a polyester thermoplastic elastomer and an ionic-conductive agent and wherein the outer layer comprises a polyester thermoplastic elastomer having a melting point within ±50° C. of the melting point of the base layer; and wherein a temperature of said die during said extrusion is set to a temperature higher than a temperature at which said base layer and said outer layer can be plasticized; and wherein a melting viscosity of said outer layer is not less than 100 (Pa·s) and is not less than ⅕ times nor more than five times as high as said melting viscosity of said base layer at said temperature set for said die; and wherein the base layer has a volume resistivity set to not less than 1.0×10 6 (Ω·cm) and not more than 1.0×10 11 (Ω·cm); and a volume resistivity of said outer layer is set to not less than 1.0×10 11 (Ω·cm) and not less than 10 times as large as that of said base layer.