Packaging material

Patent metadata

Field	Value
Publication number	US-10815024-B2
Application number	US-201515319449-A
Country	US
Kind code	B2
Filing date	Jun 17, 2015
Priority date	Jun 17, 2014
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

A bulk-based packaging material is provided, comprising at least one crease line for facilitating folding of the packaging material to a package. The at least one crease line is formed as an imprint on a primary side of the packaging material, and as an embossment on a secondary side of the packaging material, wherein the imprint is formed as an elongated groove having a triangular profile.

First claim

The invention claimed is:

1. A packaging material, comprising a laminate having a fibrous bulk layer covered by plastic coatings on each side thereof, said fibrous bulk layer comprising:
at least one crease line for facilitating folding of the packaging material to a package, the at least one crease line is formed as an imprint on a primary side of said packaging material, and as an embossment on a secondary side of said packaging material, wherein
said imprint is formed as an elongated groove having a triangular profile,
said triangular profile is non-symmetrical along a center line extending from a bottom apex in the normal direction of said packaging material,
said at least one crease line has a reduced thickness of the imprinted or embossed packaging material, compared to uncreased material, by from 5% to 25%, and
said at least one crease line, to facilitate one folding operation, has only one single fracture initiation line.

2. The packaging material according to claim 1 , wherein the fibrous bulk layer has a density higher than 300 kg/m3 and a bending stiffness index of from 6.0 to 24.0 Nm6/kg3, according to method ISO 2493-1 and SCAN-P 29:95 (equivalently 0.5 to 2.0 Nm7/kg3).

3. The packaging material according to claim 1 , which when folded is forming a fracture along the at least one crease line, the width of the fracture being less than two times the thickness of the packaging material, calculated as an average of at least 20 different measurements.

4. The packaging material according to claim 1 , wherein said primary side of said packaging material is configured to form the interior side of a package.

5. The packaging material according to claim 1 , wherein said primary side of said packaging material is configured to form the outer side of a package.

6. The packaging material according to claim 1 , comprising a set of crease lines, wherein at least one crease line is oriented in a first direction for forming a longitudinal fold, and wherein at least one crease line is oriented in a second direction for forming a transversal fold.

7. The packaging material according to claim 6 , wherein at least one crease line is oriented in a tilted direction relative the first and second directions for forming a diagonal fold corresponding to a corner or a flap of a final package.

8. The packaging material according to claim 1 , further comprising at least one area at which an imprint of a first crease line intersects with an imprint of a second crease line.

9. The packaging material according to claim 8 , wherein said area is configured to form a corner of a package, and wherein the depth of the imprints at said area is substantially the same as the depth of the imprints at other positions on the packaging material.

10. The packaging material according to claim 1 , further comprising a readable mark arranged at a fixed position relative to at least one crease line.

11. The packaging material according to claim 1 , wherein the laminate further comprises a barrier layer for preventing diffusion of oxygen through the laminate.

12. The packaging material according to claim 11 , wherein the barrier layer comprises aluminum.

13. A continuous web being made of a packaging material according to claim 1 .

14. A blank, or a capsule being made of a packaging material according to claim 1 .

15. A packaging container, comprising a packaging material according to claim 1 being folded along said at least one crease line.

Assignees

• Tetra Laval Holdings & Finance

Inventors

• Johansson Hans
• Bergholtz Lars
• Quist Jens

Classifications

• B65D85/72

  for edible or potable liquids, semiliquids, or plastic or pasty materials · CPC title

• B65D5/40 Primary

  specially constructed to contain liquids · CPC title

• B31F1/08 Primary

  Creasing (corrugating B31F1/20; zig-zag folding B65H45/20 {; combined with folding B31F1/0012, B31F1/0022; grooving by cutting B26D3/06, B26D3/08; by milling grooves B23C3/30; of plastics material B29C53/06}) · CPC title

• B65D5/4266

  Folding lines, score lines, crease lines · CPC title

• B32B2439/70

  Food packaging · CPC title