Linear low density polyethylene is a polymer with significant numbers of short ramifications, commonly made by co-polymerization of ethylene with long-chain olefins. The linearity of LLDPE results from the different manufacturing processes of LLDPE and LDPE. Generally, LLDPE is produced at lower temperatures and pressures by co-polymerization of ethylene and alpha-olefins such as butene, hexene or octene. The co-polymerization process produces an LLDPE polymer having a narrower distribution in the molecular weight than LDPE and in combination with the linear structure, significantly other properties.
LLDPE has a higher resistance to tensile and impact than LDPE, and a resistance to breakage much better than this one. It is very flexible and elastic. It can be used to produce a thinner film, with a better resistance to stress. It shows good resistance to chemicals and similar electrical properties. However, it is not as easy to process as LDPE, having a lower gloss and a narrower range of hot sealing.
LLDPE made by the use of metallocene catalysts is labeled as mLLDPE.