Compositions of ethylene polymers for the manufacture of films

Claim 1

A composition comprising (a) from 2 to less than 25 weight percent of at least one free radical ethylene polymer with a specific gravity between 0.91 and 0.94, and a melt index of at least 0.3 dg/min. and not more than 2 dg/min., the free radical ethylene polymer being obtained by polymerization under high pressure and high temperature conditions, and (b) from 75 to 98 weight percent of at least one copolymer of ethylene and at least one α-olefin containing at least 4 carbon atoms, with a specific gravity between 0.905 and 0.940 and a melt index between 0.4 and 3 dg/minute, the average proportion of α-olefin units in the copolymer being between 1 and 8 mole percent, the copolymer comprising crystalline fractions and amorphous fractions, wherein said crystalline fractions of said copolymer have a single melting peak between 118° C. and 130° C. and represent from 20 to 50 weight percent of the total copolymer, the copolymer having a polydispersity index of between about 3 and about 9 for binary polymers and between about 4 and about 12 for ternary polymers; wherein the distribution of the α-olefin units in the copolymer is heterogeneous and wherein the proportion of α-olefin units in the copolymer varies between at least 0.2 and at most 5 times the average proportion, depending on the fractions considered.