Fixing film, heat fixing apparatus, and electrophotographic image forming apparatus

A heat fixing apparatus comprising a fixing film, wherein

• the fixing film has an endless shape, and comprises at least a base material, an elastic layer, and a release layer in this order,
• the release layer comprises a tube containing a fluorine resin, and
• a value of Xe/Xm is 1.20 or more, where
• when,
• in a chart of an X-ray diffraction peaks obtained by measuring the release layer with a reflection X-ray diffraction method, a maximum X-ray diffraction strength at 2θ=17 to 19° is defined as Ic, a maximum X-ray diffraction strength at 2θ=39.5 to 40.5° is defined as Ia, and a value of Ic/Ia is defined as X, and
• a length in a direction along a rotational axis of the fixing film is defined as L,
• Xe represents an average value of X in an edge region up to 0.15 L from each opposite edge in the direction along the rotational axis of the fixing film, and
• Xm represents an average value of X in a central region with a length in the direction along the rotational axis of 0.70 L present between the two edge regions.

An electrophotographic image forming apparatus comprising a heat fixing apparatus, wherein

• the heat fixing apparatus comprises a fixing film,
• the fixing film has an endless shape, and comprise at least a base material, an elastic layer, and a release layer in this order,
• the release layer comprises a tube containing a fluorine resin, and wherein
• a value of Xe/Xm is 1.20 or more, where
• when
• in a chart of an X-ray diffraction peaks obtained by measuring the release layer with a reflection X-ray diffraction method, a maximum X-ray diffraction strength at 2θ=17 to 19° is defined as Ic, a maximum X-ray diffraction strength at 2θ=39.5 to 40.5° is defined as Ia, and a value of Ic/Ia is defined as X, and
• a length in a direction along a rotational axis of the fixing film is defined as L,
• Xe represents an average value of the X in an edge region up to 0.15 L from each opposite edge in the direction along the rotational axis of the fixing film, and
• Xm represents an average value of the X in a central region with a length in the direction along the rotational axis of 0.70 L present between the two edge regions.