Container precursor of a dimensionally stable food or drink product container with a barrier layer with fibres and a ratio of tensile strengths

A container precursor comprising at least an area of a sheet-like composite comprising a layer sequence, which comprises the following layers, superimposed to one another, in the following order from an outer surface of the sheet-like composite to an inner surface of the sheet-like composite:

• a carrier layer,
• a barrier layer, and
• a first inner polymer layer;
• wherein the sheet-like composite comprises a first longitudinal rim and a further longitudinal rim opposite the first longitudinal rim in a transversal direction of the sheet-like composite;
• wherein the container precursor comprises a longitudinal seam, which comprises from an interior of the container precursor towards an exterior of the container precursor:
• a first ply of the sheet-like composite,
• a second ply of the sheet-like composite, which is superimposed to the first ply and
• a third ply of the sheet-like composite, which is joined to the second ply;
• wherein the first ply and the second ply are constituted by the first longitudinal rim, which is folded on itself, thereby constituting a hem fold, which runs in a longitudinal direction of the sheet-like composite;
• wherein the third ply is constituted by the further longitudinal rim;
• wherein the barrier layer:
• comprises a plurality of fibers,
• has a first tensile strength in a first barrier layer direction, and
• a further tensile strength in a further barrier layer direction, which is perpendicular to the first barrier layer direction;
• and wherein a ratio of the first tensile strength to the further tensile strength is in a range from more than 0.5 to less than 1.7.

A method comprising as method steps:

• providing a sheet-like composite, comprising a layer sequence which comprises the following layers, superimposed to one another, in the following order from an outer surface of the sheet-like composite to an inner surface of the sheet-like composite:
• a carrier layer,
• a barrier layer which comprises a plurality of fibers, and
• a first inner polymer layer;
• wherein the sheet-like composite comprises a first longitudinal rim and a further longitudinal rim opposite the first longitudinal rim in a transversal direction of the sheet-like composite;
• folding the sheet-like composite on itself in the first longitudinal rim, thereby obtaining a hem fold, which runs in a longitudinal direction of the sheet-like composite;
• joining the further longitudinal rim to the first longitudinal rim, thereby obtaining a longitudinal seam of a container precursor;
• wherein a partial sheet-like composite consists of only the layers of the sheet-like composite, which are arranged on a side of the carrier layer facing the inner surface;
• wherein the partial sheet-like composite:
• has a first composite direction in a composite plane of the partial sheet-like composite,
• a further composite direction, which is also in the composite plane of the partial sheet-like composite, but perpendicular to the first composite direction,
• a first composite tensile strength in the first composite direction, and
• a further composite tensile strength in the further composite direction;
• and wherein a ratio of the first composite tensile strength to the further composite tensile strength is in a range from more than 0.5 to 1.9.

A method comprising as method steps:

• providing a sheet-like composite, comprising a layer sequence which comprises the following layers, superimposed to one another, in the following order from an outer surface of the sheet-like composite to an inner surface of the sheet-like composite:
• a carrier layer,
• a barrier layer, and
• a first inner polymer layer;
• wherein the barrier layer
• comprises a plurality of fibers,
• has a first tensile strength in a first barrier layer direction, and
• a further tensile strength in a further barrier layer direction, which is perpendicular to the first barrier layer direction;
• wherein the sheet-like composite comprises a first longitudinal rim and a further longitudinal rim opposite the first longitudinal rim in a transversal direction of the sheet-like composite;
• folding the sheet-like composite on itself in the first longitudinal rim, thereby obtaining a hem fold, which runs in a longitudinal direction of the sheet-like composite;
• joining the further longitudinal rim to the first longitudinal rim, thereby obtaining a longitudinal seam of a container precursor;
• and wherein a ratio of the first tensile strength to the further tensile strength is in a range from more than 0.5 to less than 1.7.