LLDPE resins are manufactured as odorless white pellets or granules. LLDPE polymer is made from ethylene and the comonomer alpha-olefins 1-butene, 1-hexene, or 1-octene. The molecular structure of LLDPE is characterized by a mostly linear copolymer backbone with some short-chain branching. Copolymer properties are determined by the type of olefin comonomer used, the amount of the comonomer in the chain, and the molecular weight. Compared to LDPE, LLDPE has greater tensile and impact strength, better heat-seal properties, and lower cost. LLDPE is often blended with LDPE, high density polyethylene (HDPE), or other polyolefin resins to tailor the physical characteristics for specific products.