Image forming apparatus

An image forming apparatus comprising:

• an image forming portion configured to form a toner image on a sheet using printing toner and to apply powder adhesive on the sheet;
• a fixing portion including a first rotary member pair that constitutes a first nip portion, the fixing portion being configured to heat and press the sheet conveyed from the image forming portion while nipping and conveying the sheet by the first nip portion to fix the toner image to the sheet;
• a folding portion configured to fold the sheet conveyed from the fixing portion such that a surface of the sheet on which the powder adhesive is applied is placed on an inner side of the sheet that is folded;
• and
• a bonding portion including a second rotary member pair that constitutes a second nip portion, the bonding portion being configured to heat and press the sheet folded by the folding portion while nipping and conveying the sheet by the second nip portion to bond the sheet by the powder adhesive,
• wherein a peak value of pressure that the second rotary member pair applies to the sheet in the second nip portion is greater than a peak value of pressure that the first rotary member pair applies to the sheet in the first nip portion.