Food packaging films, bags and pouches having excellent optical properties and heat sealability, low hexane extractables and a good balance of physical properties may be prepared from linear low density polyethylene having a melt flow ratio (I.sub.21/I.sub.2) from about 23 to about 32, prepared in a tandem dual reactor solution phase polymerization in the presence of a phosphinimine catalyst and a co-catalyst system which comprises an aluminum based co-catalyst, an ionic activator or a mixture thereof.