Secondary irradiation processing method for foamed plastic

The invention discloses a secondary irradiation processing method for foamed plastic. The method comprises the following steps that: 1) taking irradiation crosslinking foamed plastic as an original plate, and testing the compression strength of a plate material; 2) respectively sampling, and carrying out irradiation in gas atmosphere including air, nitrogen or acetylene for certain dosage, and adopting irradiation technologies including single-time single-face irradiation, single-time double-face irradiation, multi-time single-face irradiation, multi-time double-side irradiation. According tothe secondary irradiation processing method, traditional production formulas, technologies and equipment are not changed, foam which is formed and shaped can be directly subjected to electron beam irradiation to improve the strength of the foam, and the secondary irradiation processing method has the characteristics of effectiveness, convenience, quickness and obvious effect and does not have anyinfluence on the tradition