Abstract: The industrial roll according to the invention includes a core member made of a metal, a first adhesive layer formed in contact with an outer surface of the core member, a second adhesive layer formed on an outer surface side of the first adhesive layer, and a cover member formed in contact with an outer surface of the second adhesive layer and made of an elastic material. The first adhesive layer is made of a material with better adhesive properties to the core member than to the cover member, and the second adhesive layer is made of a material with better adhesive properties to the cover member than to the core member.

Abstract: The industrial roll according to the invention includes a core member made of a metal, a first adhesive layer formed in contact with an outer surface of the core member, a second adhesive layer formed on an outer surface side of the first adhesive layer, and a cover member formed in contact with an outer surface of the second adhesive layer and made of an elastic material. The first adhesive layer is made of a material with better adhesive properties to the core member than to the cover member, and the second adhesive layer is made of a material with better adhesive properties to the cover member than to the core member.

Abstract: In the resin roll 5 for calendering a magnetic recording medium, a surface portion 3a of a thermosetting resin outer layer 3 has high storage elastic modulus (E′) of 5×1010 to 5×1011 dyn/cm2 at a temperature of 50° to 150° C. at a frequency of 10 hertz (Hz). At the surface portion of the thermosetting resin outer layer, the expression representing the relation between storage elastic modulus (E′) and the Poisson's ratio (&ngr;) is within the following range, under the same conditions: 2×10−12 cm2/dyn<(1−&ngr;2)/E′<2×10−11 cm2/dyn.

Abstract: In a resin roll 5 for calendering a magnetic recording medium, a surface portion 3a of a thermosetting resin outer layer 3 has high storage elastic modulus (E') of 5.times.10.sup.10 to 5.times.10.sup.11 dyn/cm.sup.2 at a temperature of 50 to 150.degree. C. at a frequency of 10 hertz (Hz). At the surface portion of the thermosetting resin outer layer, the expression representing the relation between storage elastic modulus (E') and the Poisson's ratio (.nu.) is within the following range, under the same conditions:2.times.10.sup.-12 cm.sup.2 /dyn<(1-.nu..sup.2)/E'<2.times.10.sup.-11 cm.sup.

Abstract: In a resin roll 5 for calendering a magnetic recording medium, a surface portion 3a of a thermosetting resin outer layer 3 has high storage elastic modulus (E') of 5.times.10.sup.10 to 5.times.10.sup.11 dyn/cm.sup.2 at a temperature of 50.degree. to 150.degree. C. at a frequency of 10 hertz (Hz). At the surface portion of the thermosetting resin outer layer, the expression representing the relation between storage elastic modulus (E') and the Poisson's ratio (.nu.) is within the following range, under the same conditions:2.times.10.sup.-12 cm.sup.2 /dyn<(1-.nu..sup.2)/E'<2.times.10.sup.-11 cm.sup.

Abstract: A paper machine press roll comprising a metal core, a ground layer formed over the outer periphery of the core and made of a metal material having a small coefficient of expansion, and a mixture layer formed over the outer periphery of the ground layer and comprising a ceramic and a water retentivity imparting particulate substance such as mica. At least in a surface layer portion of the mixture layer, an organic high polymer such as synthetic resin or wax is filled in the interstices between particles of the ceramic and particles of the water retentivity imparting substance.