Polyethylene tanks are the most corrosive resistant tanks used in the industry. High density polyethylene is a polyethylene thermoplastic made from petroleum. HDPE has stronger intermolecular forces and tensile strength than lower density polyethylene. It is also harder and more opaque and can withstand higher temperatures 120 °C for short periods and 110 °C continuously. HDPE tanks are resistant to many different solvents and liquids. Tanks are previously made of stainless steel but HDPE replaced it because it overcomes the persistent corrosion problems of stainless steel and also the weight of HDPE tanks are very low compared to the weight of stainless steel.
Head Hang Conveyor is used for a hanging conveyor system in which articles hanging on hangers and particularly articles of clothing, are transported for sorting or ordering. The adapter is codable with data concerning the articles. The adapter is insertable between each article hanger provided with a hanger hook and the conveyor means. The adapter has a hook-shaped head region and a receiving region located below the head region. The receiving region has at least one section having a U-shaped cross section formed by an upward-extending arm. The receiving region contacts the hanger hook that the hanger hook once inserted. It is made up of two sections that are adjacent to each other, forming between them an intermediate space. Methods and arrangements for automatically loading hangers into and unloading hangers from the adapters also are provided.