Method of making a multilayer coextruded polyolefin stretch wrap film

A method for preparing a thermoplastic stretch wrap film capable of stretching upon exerting a force during application of the film to an article or group of articles to be wrapped comprising the step of:

• coextruding a film having at least three layers, said three layers having two outer layers and an intermediate layer positioned between said outer layers,
• said intermediate layer comprising a mixture of:
• a) a first linear low density polyethylene and
• b) a polyolefin selected from the group consisting of:
• i) homopolymers of propylene,
• ii) copolymers of propylene and ethylene and mixtures thereof,
• wherein the amount of force required to stretch the stretch wrap film can be controlled by adjusting the blend ratio of said mixture from 95% propylene homopolymer/5% linear low density polyethylene to 85% propylene homopolymer/15% linear low density polyethylene, and at least one of said two outer layers comprising a second linear low density polyethylene,
• said second linear low density polyethylene consisting essentially of ethylene copolymerized with at least one alpha olefin having from 4 to 10 carbon atoms and containing from 3.5 to 15 weight percent n-hexane extractibles,
• said n-hexane extractibles being present in an amount sufficient to cause the stretch wrap film to exert a cling force of at least about 200 grams when in surface-to-surface contact with itself or another surface when used in the stretch overwrap packaging of articles.