Patent ID: 11912872
Assignee: SYCORETO CAS CO., LTD.
Field: Other special machines (Mechanical engineering)
Classification: CPC C  B | IPC C

Claim 9:
10. A preparation method of the polyamide/NBR blended elastomer microcellular foaming material according to claim 1, comprising the following steps:
1) mixing processing: setting the temperature of the internal mixer above 60° C., firstly adding polyamide, adding NBR into the internal mixer after the polyamide is melted, then optionally adding the filler, optionally adding the plasticizer and adding the antioxidant in turn; mixing for the first time, then setting the temperature of the open mill below 60° C., adding the vulcanizing agent, optionally adding the vulcanizing accelerator, optionally adding the foaming agent, optionally adding the active agent; mixing for the second time, discharging to obtain the rubber compound;
2) obtaining the polyamide/NBR blended elastomer microcellular foaming material with the bimodal cell size distribution and the topological and closed-cell foaming structure by the two-stage curing method: putting the rubber compound into the extruder, and extruding the required shape to obtain the molded rubber compound; putting the molded rubber compound into the molding machine at the temperature above 120° C. for the first curing; then raising the temperature to above 150° C. for the second curing, and then preparing the polyamide/NBR blended elastomer microcellular foaming material with the bimodal cell size distribution and the topological and closed-cell foaming structure by the rapid cooling method.