Linear low-density polyethylene is available on the market in many grades with differing comonomer contents (butene or hexene), which give different characteristics to the product. The density can vary from 0.915 to 0.945 g/cm³, which comprises the density spectrum of both LDPE and HDPE. The branches in the macromolecule, which are formed from these comonomers, have a very significant effect on some of the properties of the final polymer; in fact, they influence the density value, whose increase is correlated with an increase in thermal and mechanical resistance. LLDPE is requested for its high tenacity, puncture resistance, and stress cracking resistance.
Linear Low-Density Polyethylene (LLDPE)
Addition polymerization through the Ziegler or Philips catalysts, used in a solution or in a gas phase, obtains (from catalytic processes) a copolymerization of a comonomer (butene, hexene, or octene) in the ethylene chain (copolymerization).
Resistance to hydrolysis
Low coefficient of friction
Excellent resistance to corrosion and chemicals
Low permeability to gases and vapors
Optimal flexibility at low temperatures
Optimal impact resistance at room temperature and cold temperatures
Odorless and tasteless
Single, flexible, non-thermoformed tube, wrapped in coils of various lengths.
- small footprint;
- long distances seamless.
- elastic memory of the winding;
- tolerance on the cut of +/- 2% of the length.