Container with oleophilic/oleophobic pattern on a sealing surface

Patent metadata

Field	Value
Publication number	US-11072458-B2
Application number	US-201615736976-A
Country	US
Kind code	B2
Filing date	Jun 16, 2016
Priority date	Jun 18, 2015
Publication date	Jul 27, 2021
Grant date	Jul 27, 2021

Abstract

The disclosure relates to a container ( 10 ) comprising a sealing surface ( 15 ), wherein the sealing surface ( 15 ) is provided with a pattern ( 30 ) of ridges ( 31, 32 ) and valleys ( 33 ), and wherein the sealing surface ( 15 ) has a) oleophobic and/or b) oleophilic properties: a) repelling fat such that any fat on the sealing surface ( 15 ) has a tendency not to stick to the pattern ( 30 ) on the sealing surface thus creating an essentially fat-free sealing surface orb) attracting fat such that any fat on the sealing surface ( 15 ) has a tendency to settle down in the valleys ( 33 ) of the pattern ( 30 ) on the sealing surface, respectively.

First claim

The invention claimed is:

1. A paperboard food container comprising:
one or more sidewalls,
a bottom wall, and,
a sealing surface formed of or attached to the one or more sidewalls,
wherein the sealing surface is coated with at least one polymer, and
wherein the at least one polymer is provided with a pattern of ridges and valleys mechanically formed in the at least one polymer such that the sealing surface has oleophilic properties attracting fat such that any fat on the sealing surface has a tendency to settle down in the valleys of the pattern in the polymer on the sealing surface.

2. The paperboard food container according to claim 1 , wherein a distance between a top plane to which a median of the ridges extend up to and a bottom plane to which a median of the valleys extend down to is from 2 to 200 micrometers.

3. The paperboard food container according to claim 1 , wherein a median distance between adjacent ridges is from 1 to 500 micrometers.

4. The paperboard food container according to claim 1 , wherein the bottom wall and the one or more sidewalls are integrally formed.

5. The paperboard food container according to claim 1 , wherein the sealing surface is coated with a mixture of polymers.

6. The paperboard food container according to claim 1 , wherein the sealing surface has combination of oleophobic properties and oleophilic properties.

7. The paperboard food container according to claim 5 , wherein the pattern is provided by mechanically forming the pattern in an upper surface of the mixture of polymers.

8. The paperboard food container according to claim 6 , wherein the pattern provides one or more oleophilic channels for conveying the food, fat, oil or emulsion.

9. The paperboard food container according to claim 1 , wherein the sealing surface is coated with the at least one polymer in a coating step in which coating step the at least one polymer is provided with the pattern.

10. The paperboard food container according to claim 1 , wherein the paperboard food container is produced from food grade materials, and wherein the paperboard food container is a microwavable container allowing the paperboard food container and food received in the paperboard food container to be heated in a microwave oven or an ovenable container allowing the paperboard food container and food received in the paperboard food container to be heated in a conventional oven.

11. The paperboard food container according to claim 1 , wherein the paperboard food is configured to be distributed in a flat-laid state in the form of a web or sheet comprising a plurality of such flat-laid blanks adapted to be shaped into the paperboard food containers, or in a flat-laid state in the form of individual blanks adapted to be shaped into the paperboard food containers, or in an erected state with the one or more sidewalls extending upwardly from the bottom wall.

12. A container package comprising a paperboard food container according to claim 1 and a cover attached to the sealing surface.

13. The container package according to claim 12 , wherein the cover is provided with a sealing surface being sealable to the sealing surface of the paperboard food container.

14. The paperboard food container according to claim 1 , wherein a distance between a top plane to which a median of the ridges extend up to and a bottom plane to which a median of the valleys extend down to is from 2 to 100 micrometers.

15. The paperboard food container according to claim 1 , wherein a median distance between adjacent ridges is from 1 to 150 micrometers.

Assignees

• Stora Enso Oyj

Inventors

• Ribu Ville
• Miikki Nina

Classifications

• B65D65/42

  Applications of coated or impregnated materials · CPC title

• B65D77/2024

  the cover being welded or adhered to the container · CPC title

• B65D5/48002

  integral · CPC title

• B65D5/563 Primary

  Laminated linings; Coatings · CPC title

• B32B29/06

  specially treated, e.g. surfaced, parchmentised · CPC title