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US 10,822,140 B2Granted
Plastic fabric composite, packaging bag made of a plastic fabric composite, and a method for manufacturing a packaging bag
AssigneeMondi AG
InventorJens Koesters
Life of this patent
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Abstract
A plastic fabric composite for a plastic fabric composite bag has a strip fabric, an outer film, a plastic intermediate layer disposed between the outer film and the strip fabric, where a line of weakness in a form of a punching line is included, where the strip fabric is completely severed along the punching line, where the punching line ends in the intermediate layer and where the outer film is undamaged at the punching lines.
Claims12
A plastic fabric composite for a plastic fabric composite bag, comprising:
- a strip fabric;
- an outer film;
- a plastic intermediate extrusion layer disposed between the outer film and the strip fabric;
- wherein a line of weakness in a form of a punching line extends through the strip fabric and terminates within the plastic intermediate extrusion layer;
- wherein the punching line enables the strip fabric to be completely severed along the punching line without damaging the outer film,
- wherein the outer film and the strip fabric are extrusion-laminated by molten plastic that forms the intermediate extrusion layer between the outer film and strip fabric,
- wherein the intermediate extrusion layer has a thickness between 20 μm and 55 μm and wherein the outer film has a lesser thickness than the intermediate extrusion layer.
4 more elements
A method for manufacturing a packaging bag, comprising the steps of:
- forming a plastic fabric composite web by feeding a web of an outer film and a web of a strip fabric and extrusion-laminating the outer film and the strip fabric with molten plastic, thereby forming an intermediate extrusion layer between the outer film web and the strip fabric web, wherein the intermediate extrusion layer has a thickness between 20 μm and 55 μm and wherein the outer film has a lesser thickness than the intermediate extrusion layer;
- and
- feeding the plastic fabric composite web through a punching device and forming lines of weakness in a form of punching lines at predefined intervals, between a punching roller and a mating roller so that the strip fabric is completely severed and such that the punching lines end in the intermediate extrusion layer such that the outer film remains undamaged;
- and
- forming individual packaging bags from sections of the plastic fabric composite web.
2 more elements
Dependencies are inferred from the claim text.