PE Granules

Processing properties

Because LDPE and HDPE have good fluidity, low processing temperature, moderate viscosity size, low decomposition temperature, and do not decompose at a high temperature of 300℃ in inert gas, so it is a kind of plastic with good processing performance. However, the viscosity of LLDPE is slightly higher, need to increase the motor power by 20% to 30%; easy to melt rupture, need to increase the gap between the mouth mold and add processing aids; processing temperature is slightly higher, up to 200 ~ 215 ℃. PE Granules's water absorption is low, no need to dry before processing.

Polyethylene melt belongs to non-Newtonian fluid, the viscosity fluctuates less with the change of temperature, while the increase of shear rate decreases quickly and linearly, in which the slowest decrease is in LLDPE.

PE Granules products are easy to crystallize during the cooling process, therefore, attention should be paid to the mold temperature during processing. In order to control the crystallinity of the products, so that they have different properties. The molding shrinkage of polyethylene is large and must be considered when designing the mold.