Preparation process for ETPU seat cushion

The invention discloses a preparation process for an ETPU seat cushion and belongs to the technical field of seat cushions. The preparation process for the ETPU seat cushion comprises the following steps of step 1, die pretreatment; step 2, film hanging; step 3, injection of an ETPU raw material; step 4, temperature control heating; step 5, first steam pressing: releasing steam pressure from an air hole of a front mold; step 6, secondary steam pressing: releasing steam pressure from an air hole of a rear mold; step 7, third steam pressing: releasing steam pressure from the air hole of the front mold and the air hole of the rear mold at the same time; step 8, cooling and curing; and step 9, forming and demolding. In the preparation process, the raw material for producing the seat cushion and seat cushion wrapping films can be placed in the prefabricated mold for steam pressing for three times at the same time, so that combination of the seat cushion wrapping films and the seat cushion is better; and meanwhile,