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US 9,658,585 B2Granted
Film and image heating device using film
AssigneeCanon Kabushiki Kaisha
InventorsTakanori Mitani, Akimichi Suzuki, Kazuhiro Doda, Satoshi Nishida, Isamu Takeda, Akira Okano, Masahiro Suzuki
Life of this patent
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Abstract
A cylindrical film used in an image heating device heating a recording material, on which an image has been formed, has a resin layer, this resin layer being made from a resin in which a crystalline resin and an amorphous resin having a higher glass transition temperature than the crystalline resin are blended, wherein a volume ratio of the crystalline resin with respect to the amorphous resin in the resin layer is 70/30 to 99/1.
Claims3
A method of manufacturing a belt used in a fixing device, the method comprising:
- a step of forming a base layer of the belt having a cylindrical shape by extruding a resin composition from an extrusion forming die, the resin composition including a crystalline thermoplastic resin;
- a step of calcining the base layer for 30 to 300 minutes at a temperature of 143° C. to 250° C. so that a degree of crystallinity of the base layer becomes not less than 81% of a maximum saturated degree of crystallinity of the crystalline thermoplastic resin.
Dependencies are inferred from the claim text.