A METHOD FOR MANUFACTURE OF AND A FOIL FOR ENCLOSING OR WRAPPING A PRODUCT TO BE HEATED IN AN OVEN

• US 20190315552A1
• Filed: 10/13/2017
• Published: 10/17/2019
• Est. Priority Date: 10/18/2016
• Status: Active Grant

• Current Assignee: Danapak Flexibles A/S (adapa Holding GesmbH)
• Original Assignee: Danapak Flexibles A/S (adapa Holding GesmbH)
• Inventors: Hyldgaard, Lars Wiggers, Jorgensen, Peter, Christensen, Lars Christian
• Granted Patent: US 11,174,089 B2
• Time in Patent Office: Days
• CPC Class Codes: A47J 36/027 Cooking- or baking-vessels specially adapted for use in microwave ovens; Accessories therefor
• CPC Class Codes: B05D 2202/25 based on Al
• CPC Class Codes: B05D 7/52 Two layers
• CPC Class Codes: B32B 15/082 comprising vinyl resins; comprising acrylic resins
• CPC Class Codes: B32B 15/20 comprising aluminium or copper B32B15/016 and B32B15/017 take precedence
• CPC Class Codes: B32B 2307/4023 on the layer surface, e.g. ink
• CPC Class Codes: B32B 2439/70 Food packaging
• CPC Class Codes: B65D 2581/34 for packaging foodstuffs or other articles intended to be cooked or heated within
• CPC Class Codes: B65D 2581/3494 Microwave susceptor B65D2581/3487 takes precedence
• CPC Class Codes: B65D 81/343 specially adapted to be heated in a conventional oven, e.g. a gas or electric resistance oven
• CPC Class Codes: H05B 6/6494 for cooking

Abstract

A method of manufacturing a foil for enclosing or wrapping a product configured to be heated in an oven includes: providing an aluminium layer, applying a first ink material at a surface of the aluminium layer to form a first ink layer, and applying a second ink material at a surface of the first ink layer to form a second ink layer. The first ink layer is positioned between the aluminium layer and the second ink layer, and is configured to absorb radiant energy. The second ink layer is configured to allow radiant energy to pass through to reach the first ink layer. A binder system of the first ink material or the second ink material is based at least in part on polyvinyl butyral (PVB).

Claims

1. A method of manufacturing a foil for enclosing or wrapping a product configured to be heated in an oven, comprising:

providing an aluminium layer;

applying a first ink material at a surface of the aluminium layer to form a first ink layer; and

applying a second ink material at a surface of the first ink layer to form a second ink layer, the first ink layer being positioned between the aluminium layer and the second ink layer, wherein the first ink layer is configured to absorb radiant energy, and the second ink layer is configured to allow the radiant energy to pass through to the first ink layer,

wherein a binder system of the first and/or or the second ink material is based at least in part on polyvinyl butyral (PVB).

2. The method according to claim 1, wherein the first ink material or the second ink material comprises an isocyanate-based hardener or cross-linker.

3. The method according to claim 1, wherein the first ink layer or the second ink layer is applied with a respective dry areal density or grammage of 1.5-5 grams per square meter (g/m²), or a respective dry thickness of the first or the second ink layer is less than 5.9 microns (μ

).

4. The method according to claim 1, wherein flow time, measured according to international Organization for Standardization (ISO) 2431:

2011, a of the first or the second ink material before or during application is 35-100 seconds (s) measured with flow cup no. 3 or 30-45 (s) measured with flow cup no. 4, or the kinematic viscosity of the first or the second ink material before or during application is 10-55 square millimeter per second (mm²/s).

5. The method according to claim 1, wherein the first ink material or the second ink material is diluted with ethyl acetate or propyl acetate or another acetate.

6. The method according to claim 1, wherein the first ink material comprises carbon black.

7. The method according to claim 1, wherein the second ink layer comprises titanium dioxide.

15. The method of claim 1, further comprising:

providing an oven configured to transmit radiant energy,

at least partly enclosing an object with the foil, and

positioning the object within the oven.

8. A foil for enclosing or wrapping a product configured to be heated in an oven, comprising:

an aluminum layer; and

a first ink layer positioned between the aluminium layer and a second ink layer, wherein the first ink layer is configured to absorb radiant energy, and the second ink layer is configured to allow the radiant energy to pass through to the first ink layer;

wherein a binder system of an ink material of the first ink layer or of the second ink layer is based at least in part on polyvinyl butyral (PVB).

9. A The foil according to claim 8, wherein the ink material of the first or the second ink layer comprise(s) an isocyanate-based hardener or cross-linker.

10. The foil according to claim 8, wherein the ink material of the first ink layer comprises carbon black.

11. The foil according to claim 8, wherein the second ink layer comprises titanium dioxide.

12. A method of manufacturing a foil for enclosing or wrapping a product configured to be healed in an oven, comprising:

providing an aluminium layer;

applying a first ink material at a surface of the aluminium layer to form a first ink layer;

applying a second ink material at a surface of the first ink layer to form a second ink layer, the first ink layer being positioned between the aluminium layer and the second ink layer;

applying a third ink material at an opposite surface of the aluminium layer to form a third ink layer, wherein the opposite surface is opposite the surface of the aluminium layer where the first ink layer is applied; and

applying a fourth ink material at a surface of the third ink layer to form a fourth ink layer, the third ink layer positioned between the aluminium layer and the fourth ink layer, wherein the first ink layer and the third ink layer are configured to absorb radiant energy, and the second ink layer and the fourth ink layer are configured to allow the radiant energy to pass through them.

13. A foil for enclosing or wrapping a product configured to be heated in an oven, comprising:

an aluminium layer;

a first ink layer positioned between the aluminium layer and a second ink layer, wherein the first ink layer is configured to absorb radiant energy, and the second ink layer is configured to allow the radiant energy to pass through to the first ink layer; and

a third ink layer positioned between the aluminium layer and a fourth ink layer, the third ink layer being positioned on an opposite surface of the aluminium layer from the first ink layer, wherein the third ink layer is configured to absorb the radiant energy, and the fourth ink layer is configured to allow the radiant energy to pass through to the third ink layer.

14. (canceled)

16. (canceled)