Tubular fixing member, fixing device, and image forming apparatus

Abstract

A tubular fixing member includes a first layer and a second layer that is disposed in contact with an outer circumferential side of the first layer. In a case where thermal conductivities of the first layer in an axial direction, a circumferential direction, and a thickness direction are denoted by λ1x, λ1y, and λ1z, respectively, and thermal conductivities of the second layer in the axial direction, the circumferential direction, and the thickness direction are denoted by λ2x, λ2y, and λ2z, respectively, the following requirements (1), (2), and (3) are satisfied. Requirement ⁢ ( 1 ) : λ ⁢ 1 ⁢ x < λ ⁢ 1 ⁢ z ⁢ and ⁢ λ ⁢ 1 ⁢ y < λ ⁢ 1 ⁢ z Requirement ⁢ ( 2 ) : λ ⁢ 1 ⁢ z > λ ⁢ 2 ⁢ z Requirement ⁢ ( 3 ) : λ ⁢ 2 ⁢ x > λ ⁢ 2 ⁢ y ⁢ and ⁢ ⁢ λ ⁢ 2 ⁢ x > λ ⁢ 2 ⁢ z

Dependencies are inferred from the claim text.