High clarity polyolefin multilayer blown coextruded film

The present invention relates to films of high clarity made on blown film coextrusion equipment and especially but not exclusively to metallocene and Ziegler-Natta catalyst produced ethylene copolymers and titanium chloride derived ethylene copolymers from which the films may be made. The films may be made using modified processing conditions and/or using selected density differentials between core and outer layer or layers of the film. At least two techniques can be used separately or together to achieve higher clarity in multilayer blown coextruded films. In a first technique, the core layer is extruded at a higher temperature than the skin layer or layers. In the second technique, the core layer has a higher density than the skin layer or layers. Combinations of these techniques are also contemplated. Either one or both techniques may be used to a sufficient degree to improve clarity (generally lower haze).