Sheetlike composite, in particular for the production of dimensionally stable foodstuff containers, having a first bending resistance which is less than a further bending resistance

Patent metadata

Field	Value
Publication number	US-2019270270-A1
Application number	US-201716342760-A
Country	US
Kind code	A1
Filing date	Oct 16, 2017
Priority date	Oct 17, 2016
Publication date	Sep 5, 2019
Grant date	—

Abstract

The present invention refers to a sheetlike composite, comprising as a layer sequence in a direction from an outer surface of the sheetlike composite to an inner surface of the sheetlike composite a) an outer polymer layer, b) a colour application, c) a carrier layer, and d) a barrier layer; wherein the sheetlike composite comprises at least one longitudinal crease line; wherein the at least one longitudinal crease line is oriented in a first direction; wherein the sheetlike composite has a first bending resistance in the first direction; wherein a further direction is perpendicular to the first direction; wherein the sheetlike composite has a further bending resistance in the further direction; wherein the first bending resistance is less than the further bending resistance. The invention further refers to a container precursor and to a closed container, in each case comprising the preceding sheetlike composite; and to a container precursor and a closed container, in each case having a sheetlike composite with a first bending resistance along a first direction which is less than a further bending resistance along a further direction.

First claim

1 . A sheetlike composite, comprising as a layer sequence in a direction from an outer surface of the sheetlike composite to an inner surface of the sheetlike composite
a) an outer polymer layer, b) a colour application, c) a carrier layer, and d) a barrier layer; wherein the sheetlike composite comprises at least one longitudinal crease line; wherein the at least one longitudinal crease line is oriented in a first direction; wherein the sheetlike composite has a first bending resistance in the first direction; wherein a further direction is perpendicular to the first direction; wherein the sheetlike composite has a further bending resistance in the further direction; wherein the first bending resistance is less than the further bending resistance.

2 . The sheetlike composite according to claim 1 , wherein a ratio of the first bending resistance to the further bending resistance is in the range from 1:10 to 1:1.5.

3 . The sheetlike composite according to claim 1 , wherein the carrier layer comprises a plurality of fibres,
wherein at least 55% of the fibres of the plurality of fibres incline an angle of less than 30° with the further direction.

4 . The sheetlike composite according to claim 1 , wherein the outer polymer layer is an outermost layer of the sheetlike composite.

5 . The sheetlike composite according to claim 1 , wherein the colour application adjoins the carrier layer.

6 . The sheetlike composite according to claim 1 , wherein the carrier layer includes one selected from the group consisting of paperboard, cardboard, and paper, or a combination of at least two thereof.

7 . The sheetlike composite according to claim 1 , wherein the colour application comprises at least 4 wt.-% of at least one colourant, based on the weight of the colour application.

8 . The sheetlike composite according to claim 1 , wherein the outer polymer layer comprises at least 50 wt.-% of a polyethylene, based on the weight of the outer polymer layer.

9 . A container precursor comprising the sheetlike composite according to claim 1 .

10 . A container precursor ( 300 ), comprising a sheetlike composite;
wherein the sheetlike composite comprises as a layer sequence in a direction from an outer surface of the sheetlike composite to an inner surface of the sheetlike composite a) an outer polymer layer, b) a colour application, c) a carrier layer, and d) a barrier layer; wherein the sheetlike composite has been folded, thereby forming at least one longitudinal fold of the container precursor; wherein the at least one longitudinal fold is oriented in a first direction; wherein the sheetlike composite has a first bending resistance in the first direction; wherein a further direction is perpendicular to the first direction; wherein the sheetlike composite has a further bending resistance in the further direction; wherein the first bending resistance is less than the further bending resistance.

11 . A closed container, comprising the sheetlike composite according to claim 1 .

12 . A closed container, surrounding an interior;
wherein the closed container comprises a sheetlike composite; wherein the sheetlike composite comprises as a layer sequence in a direction from an exterior of the closed container to the interior a) an outer polymer layer, b) a colour application, c) a carrier layer, and d) a barrier layer; wherein the closed container has at least one longitudinal edge; wherein the at least one longitudinal edge is oriented in a first direction; wherein the sheetlike composite has a first bending resistance in the first direction; wherein a further direction is perpendicular to the first direction; wherein the sheetlike composite has a further bending resistance in the further direction; wherein the first bending resistance is less than the further bending resistance.

Assignees

• Sig Technology Ag

Inventors

• Bönsch Karen
• Schollenberger Heinrich

Classifications

• B65H45/22

  Longitudinal folders, i.e. for folding moving sheet material parallel to the direction of movement · CPC title

• B32B7/12

  using interposed adhesives or interposed materials with bonding properties · CPC title

• B32B5/142 Primary

  Variation across the area of the layer · CPC title

• B32B27/308

  comprising acrylic (co)polymers · CPC title

• B32B15/085

  comprising polyolefins · CPC title