Multilayered polyolefin films
AssigneeTaghleef Industries, S.L.U.
InventorsManuel LÓPEZ QUESADA, Cristina LÓPEZ JAÉN
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Abstract
The invention relates to a polyolefin film comprising at least five layers: a core layer (a), comprising a polyolefin; an outer supporting layer (b), comprising copolymers of ethylene and propylene; an inner supporting layer (c), on the face of the core layer opposite to the outer supporting layer, comprising a polyolefin; a first coating layer (d) immediately in contact with the inner supporting layer (c), and finally a second coating layer (e) immediately in contact with the inner supporting layer (c), both comprising copolymers of ethylene with one or several polar monomers. In addition, the present invention relates to the process of manufacturing said polyolefin film and also the uses thereof for coating a substrate.
Claims22
A polyolefin film comprising at least the following five layers:
- a. a core layer (a) comprising a polyolefin;
- b. an outer supporting layer (b) comprising polypropylene homopolymer, random or graft copolymers of ethylene/propylene, copolymers of ethylene with vinyl acetate (VA), acrylic amide (AAm), ethyl acrylate (EA), butyl acrylate (BA), vinyl alcohol (VOH), or maleic anhydride (MAH) and/or combinations thereof and/or propylene/ethylene random copolymers and/or polyethylene of medium density or combinations thereof;
- c. an inner supporting layer (c) on the face of the core layer opposite to the outer supporting layer (b), comprising a polyolefin selected from copolymers or terpolymers of ethylene with higher alpha-olefins, a polyolefin plastomer, a linear low-density polyethylene (LLDPE), a metallocen LLDPE or random copolymers of ethylene with polar monomers selected from vinyl acetate (VA), acryl amide (AAm), methyl acrylate (MA), ethyl acrylate (EA), butyl acrylate (BA), vinyl alcohol (VOH), or maleic anhydride (MAH);
- d. a first coating layer (d) immediately in contact with the inner supporting layer (c) comprising LLDPE or copolymers of ethylene with one or several polar monomers;
- e. a second coating layer (e) in contact with the first coating layer (d) comprising copolymers of ethylene with one or several polar monomers.
- wherein layers (a), (b) and (c) are co-extruded and are biaxially oriented and wherein the first coating layer (d) and the second coating layer (e) are co-extruded by co-extrusion-coating.
(canceled)
Dependencies are inferred from the claim text.