The present invention discloses a hollow article with a microporous wall. A large number of micropores are uniformly distributed in the wall and bottom of the hollow article, with a micropore diameter of no more than 150 μm; the inner and outer surfaces of the wall and bottom are of solid structure. The present invention also discloses a preparation method of the above hollow article with a microporous wall, comprising the following steps: preparing a foaming masterbatch: uniformly mixing a pretreated foaming agent, a nano nucleating agent, a dispersant, an activity regulator and a matrix resin, and preparing the foaming masterbatch by a plastic extruder; uniformly mixing dried plastic raw materials, melting, extruding and pelletizing by a plastic extruder to form a main material for the hollow article to be molded; adding the foaming masterbatch into the main material and uniformly mixing to form a mixed material; conducting a heating gas release test on the mixed material to determine a gas release time curve of the mixed material at a corresponding temperature T, wherein characteristic values of the curve include peak time tP, start time tS and end time tE; based on the gas release time curve obtained, adding the mixed material into a three-in-one injection blow molding machine equipped with a preform mold and a blow mold, wherein during injection blow molding, the maximum temperature set for the barrel of the injection blow molding machine is T, and the time interval from when the mixed material enters the machine barrel from the hopper to when the melt starts to be blown is between tS and tP; thus obtaining the hollow article with a microporous wall.

Country Code: CN

Application Number: CN202411461285.9