ENDLESS BELT, FIXING BELT, FIXING DEVICE AND IMAGE FORMING DEVICE

PROBLEM TO BE SOLVED: To provide an endless belt in which occurrence of a crack due to repeated bending deformation at the time of use is suppressed.SOLUTION: An endless belt 10 is constituted of a three-layer structure sequentially laminated with a metal layer 10a, a heat-resistant elastic layer 10b and a heat-resistant resin layer 10c from an inner peripheral side. A metallic material used for the metal layer 10a is to be tested in conformity with metallic material tensile testing of JIS Z2241. A test piece of the metallic material complies with specifications of a metallic material tensile testing piece of JIS Z2201. In a stress-strain diagram measured by using a testing machine specified in a correction verification method of a tensile/compression testing machine-force measurement system of JIS B7721, the testing machine used for the tensile testing has stress until an upper yield point equal to or more than 343 N/mm, breaking elongation equal to or more than 3.0% and a product obtained by multiplying the upper yield point by the breaking elongation equal to or more than 1029.