Patent ID: 8207255

Claim:
A polyethylene composition comprising 0.01% to 1% by weight of at least one platelet-shaped nano boehmite nucleator, wherein the platelet-shaped nano boehmite nucleator comprises at least 70% by weight of Al 2 O 3 and has a crystallite size of equal to or greater than 60 nm and less than or equal to 80 nm, wherein the platelet-shaped nano boehmite nucleator is in the form of a particle having a particle size ranging from 5 μm to 150 μm, and the polyethylene composition has a density greater than 0.94 g/cm 3 , a melt index (MI 2 ) ranging from equal to or greater than 0.3 g/10 min, up to equal to or less than 3 g/10 min., and a peak crystallization temperature (T c ) value determined according to ASTM D 3418, with an annealing temperature of 160° C. and a cooling rate of 10° C./min., that corresponds to formula (I): T c ( A *density)−73.5° C. (I) where A is 200 cm 3 -° C./g, T c is in units of ° C., and density is in units of g/cm 3 .