Nucleation of Gas Bubbles in Extrusion Foaming of High-Pressure Polyethylene

The nucleation of gas bubbles in extrusion foaming of high-pressure polyethylene is considered. Experiments show that undissolved gas microbubbles in the answer being foamed can have a significant effect on the number density of pores in the foam. A straightforward model for estimating the number density of supercritical nuclei is normally proposed. The effect plastic compounding machines of the proper time of blending of gas and polymer in the extruder, the talc concentration, and the geometric attributes of the nozzle on the quantity density of pores in the foam is normally analyzed.