The quality of the raw materials used in the production of products will also have a close relationship with the products produced in the future. Just like the raw materials such as HDPE resin and LDPE resin used in PE pipes, they can increase the tensile strength and load-bearing capacity of PE pipes, and the manifestation of these properties will enhance the effectiveness of the product.
PE pipes are polymerized from monomer ethylene, as different polymerization reaction conditions such as pressure and temperature can result in resins of different densities during polymerization. So there are different types of polyethylene: high-density polyethylene, medium density polyethylene, and low-density polyethylene. When processing different types of PE pipes, different resin grades are selected according to their application conditions, and the requirements for extruders and molds also vary.
PE pipes for water supply are the replacement products of traditional steel pipes and polyvinyl chloride drinking water pipes. PE pipes need to withstand a certain amount of pressure, and usually use PE resins with high molecular weight and good mechanical properties, such as HDPE resin, LDPE resin, etc. However, LDPE resin has low tensile strength, poor pressure resistance, poor rigidity, poor dimensional stability during molding and processing, and difficult connection, making it unsuitable as a material for water supply pressure pipes. But due to its high hygiene standards, LDPE, especially LLDPE resin, has become a commonly used material for producing drinking water pipes. LDPE and LLDPE resins have low melt viscosity, good flowability, and are easy to process, so the selection range for their melt index is also wide, usually with a MI between 0.3-3g/10min.
After knowing the relevant information about the raw materials used for PE pipes, we can also make judgments based on their properties when selecting products, and choose materials that are more suitable for the product you are using.