Low-shrinkage high-resilience EPE beads and preparation method

The invention discloses a low-shrinkage high-resilience EPE beads. The non-metallocene catalyzed LLDPE resin is adopted as the main base material so enable the EPE beads to have relatively high porosity by closed pore, and HDPE is used as an auxiliary material to enable the EPE beads to have rigidity and resilience after foaming; no anti-shrinkage agent needs to be added, and the porosity by closed pore of the EPE beads is as high as 95% or above, the shrinkage rate is as low as 2-3%, the foaming aperture is 200-300 micrometers, the surface glossiness is good, the light transmittance is high, the mechanical property is excellent, and the surface adhesive power is high; in addition, as inorganic gas in a supercritical state is used as a foaming agent, no heat preservation device is required after foaming, all needed is to feed steam of 0.3-3 KPa into the conveying pipeline of polyethylene resin particles, the continuous increase in foam pores of the polyethylene resin particles is completed through the fact that steam stays in the conveying pipeline for 30-120s; the production efficiency is high, and the energy consumption is low.