Introduction To HDPE Pipes

HDPE is a thermoplastic resin with high crystallinity and non polarity. The appearance of HDPE in its original state is milky white, with a certain degree of translucency on its thin cross-section. PE has excellent resistance to most household and industrial chemicals. Certain types of chemicals can cause chemical corrosion, such as corrosive oxidants (concentrated nitric acid), aromatic hydrocarbons (xylene), and halogenated hydrocarbons (carbon tetrachloride). This polymer is non hygroscopic and has good water vapor resistance, making it suitable for packaging purposes. HDPE has excellent electrical properties, especially its high dielectric strength, making it very suitable for wires and cables. Medium to high molecular weight grades have excellent impact resistance, even at room temperature and low temperatures of -40F.
PE can be manufactured using a wide range of different processing methods. Including sheet extrusion, film extrusion, pipe or profile extrusion, blow molding, injection molding, and rotational molding.
Extrusion: The grade used for extrusion production generally has a melt index of less than 1 and a MWD of medium to wide. During the processing, low MI can achieve appropriate melt strength. Wider MWD grades are more suitable for extrusion molding because they have higher production speeds, lower die pressure, and reduced melt fracture trends.