PE can be manufactured with a wide variety of different processing methods. These include, for example, sheet extrusion, film extrusion, pipe or profile extrusion, blow molding, injection molding and rotational molding.
Extrusion: Grades for extrusion production generally have a melt index of less than 1 and a medium to broad MWD. During processing, low MI can achieve suitable melt strength. Wider MWD grades are more suitable for extrusion because they have higher production speeds, lower die pressures and a reduced tendency to melt fracture.