Pearl sponge foaming material is a new type of packaging and filling material. Its superior characteristics are more and more recognized by people, so its use will continue to expand and innovate. It is composed of numerous independent bubbles produced by physical foaming of LDPE. It overcomes the shortcomings of the ordinary styrofoam, such as friability, deformation and poor recovery. It has many advantages, such as water-proof, moisture-proof, shockproof, sound insulation, heat preservation, good plasticity, strong toughness, recycling and strong impact resistance, and also has good chemical resistance.