Reinforced thin film for flexible packaging
AssigneeMegaplast S.A. Packaging Materials Industry
InventorsKonstantinos G. Gatos, Anthony G. Karandinos
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Abstract
The invention provides a thermoplastic film comprising: a base film wherein the base film comprises a stretchable polyolefin material comprising one or more layers; and a plurality of extruded fiber elements; wherein the extruded fiber elements are located on at least one surface of the base film; wherein the extruded fibers form one or more protrusions relative to the plane of the base film; wherein at the location where the fiber elements are provided on the base film, a domain of a material mixture comprising the base film material and the fiber material is present between a domain of pure base film material and a domain of pure fiber material, and wherein the average thickness of the base film is less than the average thickness of the protrusion.
Claims46
A thermoplastic film comprising:
- a base film wherein the base film comprises a stretchable polyolefin material comprising one or more layers;
- and
- a plurality of extruded fibre elements;
- wherein the extruded fibre elements are located on at least one surface of the base film;
- wherein the extruded fibres form one or more protrusions relative to the plane of the base film;
- wherein at the location where the fibre elements are provided on the base film, a domain of a material mixture comprising the base film material and the fibre material is present between a domain of pure base film material and a domain of pure fibre material, such that at least a portion of each fibre element forms an interfacial mixture with the base film;
- wherein the average thickness of the base film is less than the average thickness of the protrusion and
- wherein the extruded fibres have an oval or elliptical cross section and have a basis weight of less than 1 gr/cm2.
A thermoplastic film obtainable by the steps comprising:
- (i) extruding a base film comprising a stretchable polyolefin material comprising one or more layers;
- (ii) extruding a plurality of fibre elements;
- (iii) applying the plurality of fibre elements to at least one side of the base film;
- and
- (iv) bonding the fibre elements to the base film;
- wherein the extruded fibres form one or more protrusions relative to the plane of the base film;
- wherein at the location where the fibre elements are provided on the base film, a domain of a material mixture comprising the base film material and the fibre material is present between a domain of pure base film material and a domain of pure fibre material,
- wherein the average thickness of the base film is less than the average thickness of the protrusion, and
- wherein the extruded fibres have an oval or elliptical cross section and have a basis weight of less than 1 gr/cm2.
Dependencies are inferred from the claim text.