Supply Vrigin LLDPE Linear Low Density Polyethylene

The rheological properties of LLDPE can be summarized as "rigid in shear" and "soft in extension". When LLDPE is used to replace LDPE, the film extrusion equipment and conditions must be modified. The high viscosity of LLDPE requires the extruder to have higher power and provide higher melt temperature and pressure. The die gap must be widened to avoid production reduction due to high back pressure and melt fracture.

With the increase of the deformation rate of polyethylene, LDPE shows an amazing increase in viscosity, which is caused by molecular chain entanglement. This phenomenon cannot be observed in LLDPE, because the lack of long branched chains in LLDPE makes the polymer not entangled. This property is very important for thin film applications. LLDPE films are easier to make thinner films while maintaining high strength and toughness.