Tackified ethylene-acrylate cling layers in stretch/cling films
AssigneeExxon Chemical Patents Inc.
InventorsPatrick Brant, Paul M. German
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Abstract
A thermoplastic film is provided which is especially suited for use in stretch/cling applications such as, for example, the bundling, packaging and unitizing of foods and other goods. The film comprises a cling layer comprising (i) a polymer of at least ethylene and acrylate or vinyl acetate, blended with (ii) a compatible, non-migratory tackifier. The film may further comprise a non-cling layer comprising a thermoplastic material essentially free of tackifier, with or without an anticling (slip and/or antiblock) additive. Preferred thermoplastic materials include linear low density polyethylene and polypropylene.
Claims3
A method for bundling, packaging or unitizing an article or a plurality of articles, comprising the step of:
- stretch-wrapping a stretch/wrap thermoplastic film, comprising a cling layer consisting essentially of (i) a polymer of two or more monomers, wherein a first monomer comprises ethylene and a second monomer comprises an acrylate or vinyl acetate, and (ii) a compatible tackifier blended therewith, said polymer/tackifier blend having a glass transition temperature of about 0.degree. C. or less;
- and a second layer adjacent to said cling layer around the article or articles.
A bundled, packaged or unitized article or plurality of articles, comprising:
- the article or plurality of articles having a stretch/wrap thermoplastic film, comprising a cling layer consisting essentially of (i) a polymer of two or more monomers, wherein a first monomer comprises ethylene and a second monomer comprises an acrylate or vinyl acetate, and (ii) a compatible tackifier blended therewith, said polymer/tackifier blend having a glass transition temperature of about 0.degree. C. or less;
- and a second layer adjacent to said cling layer stretch-wrapped around said article or plurality of articles.
A method for the surface protection of an article, comprising the step of:
- covering the surface to be protected on the article with a stretch/wrap thermoplastic film, comprising a cling layer consisting essentially of (i) a polymer of two or more monomers, wherein a first monomer comprises ethylene and a second monomer comprises an acrylate or vinyl acetate, and (ii) a compatible tackifier blended therewith, said polymer/tackifier blend having a glass transition temperature of about 0.degree. C. or less;
- and a second layer adjacent to said cling layer.
Dependencies are inferred from the claim text.