LDPE Granules Low-density Polyethylene is a thermos plastic made from the monomer ethylene. It is widely used for manufacturing various containers, dispensing bottles, wash bottles, tubing, plastic bags for computer components and various molded laboratory equipment. Its most common use is in plastic bags. Other products made from it include: Trays and general purpose containers. Corrosion-resistant work surfaces. Parts that require flexibility, for which it serves very well.