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US 12,379,682 B2Granted
Grease composition for heat fixing devices and heat fixing apparatus
AssigneeCanon Kabushiki Kaisha
InventorsMunehito Kurata, Hisashi Nakahara, Hirohiko Aiba, Daisuke Sato, Hideo Nanataki, Masahito Omata, Hiroyuki Sakakibara, Takaaki Akamatsu, Yoshihito Oshima, Koichi Sugawara
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Abstract
A grease composition for heat fixing devices contains a base oil and polytetrafluoroethylene. The base oil contains a perfluoropolyether having at least one of the structures represented by formulas (I) and (II) in the molecule and has a kinematic viscosity v40 of 800 mm2/s to 2500 mm2/s at 40° C., and whose kinematic viscosity v200 at 200° C. is 1/50 or less of the kinematic viscosity v40.
Claims2
A grease composition comprising:
- a base oil;
- and
- polytetrafluoroethylene,
- wherein the base oil contains a perfluoropolyether having at least one structure selected from the group consisting of a structure represented by formula (I) and a structure represented by formula (II) in a molecule, and
- wherein the base oil has a kinematic viscosity v40 of 800 mm2/s to 2500 mm2/s at 40° C., and whose kinematic viscosity v200 at 200° C. is 1/50 or less of the kinematic viscosity v40:
2 more elements
A heat fixing device comprising:
- a heating rotor;
- a slide portion on which the heating rotor slides during rotation;
- a pressure rotor disposed opposite the heating rotor, and
- a grease composition between the slide portion and the heating rotor, the grease composition containing a base oil and polytetrafluoroethylene,
- wherein the base oil contains a perfluoropolyether having at least one structure selected from the group consisting of a structure represented by formula (I) and a structure represented by formula (II) in the molecule, and
- wherein the base oil has a kinematic viscosity v40 of 800 mm2/s to 2500 mm2/s at 40° C. and whose kinematic viscosity v200 at 200° C. is 1/50 or less of the kinematic viscosity v40:
3 more elements
Dependencies are inferred from the claim text.