Fixing belt
An objective of the present invention is to provide a fixing belt having excellent thermal conductivity and capable of suppressing a torque increase in long-term use. The fixing belt of this invention has a base layer including a polyimide resin, a thermal conductive filler, and a wear-resistant filler, the old Mohs hardness of the wear-resistant filler is 5 or more, the thermal conductivity of the base layer is 0.7 W/mK or more, and the inner surface roughness Rz of the base layer in a sliding direction is 2.0 μm or less.
1 . A fixing belt comprising:
a base layer including a polyimide resin;
a thermal conductive filler; and
a wear-resistant filler,
wherein old Mohs hardness of the wear-resistant filler is in a range of 5 or more,
thermal conductivity of the base layer is in a range of 0.7 W/mK or more,
inner surface roughness Rz of the base layer in a sliding direction is in a range of 2.0 μm or less.
2 . The fixing belt according to claim 1 ,
wherein a particle diameter of the wear-resistant filler is in a range from 0.1 μm to 10 μm,
an additive amount of the wear-resistant filler to the base layer is in a range from 0.1 part by volume to 10 parts by volume.
3 . The fixing belt according to claim 1 ,
wherein the wear-resistant filler has a plate-like shape, a needle-like shape, or a spherical shape.
4 . The fixing belt according to claim 1 ,
wherein a particle diameter of the thermal conductive filler is in a range from 0.1 μm to 10 μm,
an additive amount of the thermal conductive filler to the base layer is in a range from 5 parts by volume to 50 parts by volume.
5 . The fixing belt according to claim 1 ,
wherein the old Mohs hardness of the wear-resistant filler is in a range from 5 to 9.
6 . The fixing belt according to claim 1 ,
wherein the thermal conductivity of the base layer is in a range from 0.7 W/mK to 2.5 W/mK.
7 . The fixing belt according to claim 1 ,
wherein the inner surface roughness Rz of the base layer in the sliding direction is in a range from 0.3 μm to 2.0 μm.
8 . The fixing belt according to claim 1 ,
wherein elongation of the base layer is in a range from 2% to 20%.
9 . The fixing belt according to claim 1 ,
wherein piercing strength of the base layer is in a range from 0.9 kgf to 2.0 kgf.
10 . The fixing belt according to claim 2 ,
wherein the wear-resistant filler has a plate-like shape, a needle-like shape, or a spherical shape.
11 . The fixing belt according to claim 2 ,
wherein a particle diameter of the thermal conductive filler is in the range from 0.1 μm to 10 μm, and
an additive amount of the thermal conductive filler to the base layer is in a range from 5 parts by volume to 50 parts by volume.
12 . The fixing belt according to claim 3 ,
wherein a particle diameter of the thermal conductive filler is in a range from 0.1 μm to 10 μm, and
an additive amount of the thermal conductive filler to the base layer is in a range from 5 parts by volume to 50 parts by volume.
13 . The fixing belt according to of claim 2 ,
wherein the old Mohs hardness of the wear-resistant filler is in a range from 5 to 9.
14 . The fixing belt according to claim 3 ,
wherein the old Mohs hardness of the wear-resistant filler is in a range from 5 to 9.
15 . The fixing belt according to claim 4 ,
wherein the old Mohs hardness of the wear-resistant filler is in a range from 5 to 9.
16 . The fixing belt according to claim 2 ,
wherein the thermal conductivity of the base layer is in a range from 0.7 W/mK to 2.5 W/mK.
17 . The fixing belt according to claim 3 ,
wherein the thermal conductivity of the base layer is in a range from 0.7 W/mK to 2.5 W/mK.
18 . The fixing belt according to claim 4 ,
wherein the thermal conductivity of the base layer is in a range from 0.7 W/mK to 2.5 W/mK.
19 . The fixing belt according to claim 5 ,
wherein the thermal conductivity of the base layer is in a range from 0.7 W/mK to 2.5 W/mK.
20 . The fixing belt according to claim 2 , wherein the inner surface roughness Rz of the base layer in the sliding direction is in a range from 0.3 μm to 2.0 μm.