HDPE height-adjusting backing plate 54E1 is non-toxic and tasteless, the density is in the range of 0.940~0.976 g/cm3; the operating temperature can reach 100℃; the melting temperature is 120~160℃. It has good heat and cold resistance, good chemical stability, high rigidity and toughness, and high mechanical strength. Dielectric properties, wear resistance, and environmental stress cracking resistance are also good.