Polyethylene 3840 is a type of high-density polyethylene that is used in various industries such as packaging, piping, automotive manufacturing, and household products. This material has properties such as high resistance, suitable flexibility, and ease of processing. Additionally, polyethylene 3840 is resistant to UV radiation and has good impact strength. The molding process for this material is usually done using the rotomolding method, which includes the stages of mold preparation, filling the mold with powder, heating and rotating the mold, cooling, and finally removing the product from the mold.