Heat-resistant resin belt, manufacturing method thereof and image forming apparatus

摘要

A heat-resistant endless resin belt (10) including a heat-resistant resin sheet, which can be employed in a thermal fixing apparatus, wherein the sheet includes two cutting work parts in an inclined shape. The two parts are overlapped with each other and bonded with an adhesive to form a bonding part. An external shape displacement f (x), measured via a flatness measuring apparatus, which scans the belt (10) in a width direction thereof, satisfies a following formula ˆ« o x | f x - g x | dx ‰¤ XL 6800 , wherein "X" (mm) is a length of the belt (10) in a width direction thereof ; "L" (mm) is a perimeter of the belt (10) and "g (x)" represents a displacement of an ideal shape of the heat-resistant resin belt (10), when g (x) = C (a constant), a left side of the formula is set to be a minimum; whilst when g (x) is a variable, the displacement of the ideal shape of the heat-resistant resin belt (10) is set.