Active film adhered to flexible packages and method thereof
View Patent ↗The present invention relates to a method of attaching an active film ( 5 ) onto a flexible package comprising the steps of heating a foil ( 2 ); applying an active film ( 5 ) to the foil ( 2 ); and applying sufficient pressure to the active film ( 5 ) and foil ( 2 ) combination and sufficient heat to the foil ( 2 ) so that active film ( 5 ) adheres to the foil ( 2 ). In one example, the active film ( 5 ) comprises two components and wherein the two components are an active agent and a polymer. In another example, the active agent is an absorbing material.
1. A method of attaching an active film and foil combination onto a flexible package comprising the steps of:
providing a foil having a polymer sealing layer;
providing an active film comprising an active agent and a polymer;
providing a flexible package;
heating the foil such that the polymer sealing layer becomes pliable;
selecting a sealing area of the foil for forming a seal between the foil and the flexible package and a non-sealing area of the foil not to be sealed to the flexible package;
applying the active film to the polymer sealing layer of the heated foil in the non-sealing area of the heated foil to produce an active film and foil combination;
applying sufficient pressure to the active film and foil combination and sufficient heat to the foil so that the active film adheres to the polymer sealing layer of the foil; and
adhering the active film and foil combination to the flexible package by forming a seal between the sealing area of the foil and the flexible package.
2. The method of claim 1 wherein the active agent is an absorbing material.
3. The method of claim 1 wherein the active agent is a releasing material.
4. The method of claim 1 wherein the active agent is an activation material.
5. The method of claim 1 wherein a thickness of active film is in the range of about 0.05 mm to about 1.0 mm.
6. The method of claim 1 wherein the active film adheres to the foil solely by the heat and the pressure applied to the combination and without any additional adhesive materials.
7. A method of attaching an active film and foil combination onto a flexible package comprising the steps of:
providing a foil having a polymer sealing layer;
providing an active film comprising an active agent and a polymer;
providing a flexible package;
advancing the foil from a foil supply roll;
advancing the active film from an active film supply roll;
selecting a sealing area of the foil for forming a seal between the foil and the flexible package and a non-sealing area of the foil not to be sealed to the flexible package;
selecting an active film attachment area of the foil for attachment of the active film;
cutting the active film into a pre-determined length, wherein the predetermined length is sized so as to permit attachment to the foil in only the active film attachment region of the foil;
heating the foil such that the polymer sealing layer becomes pliable;
applying the cut active film to the polymer sealing layer of the heated foil in the active film attachment area of the foil;
applying sufficient pressure to the active film and foil combination and sufficient heat to the foil so that the active film adheres to the polymer sealing layer of the foil to produce an active film and foil combination; and
adhering the active film and foil combination to the flexible package by forming a seal between the sealing area of the polymer sealing layer of the foil and the flexible package.
8. The method of claim 7 wherein the active agent is an absorbing material.
9. The method of claim 7 wherein the active agent is a releasing material.
10. The method of claim 7 wherein the active agent is an activation material.
11. The method of claim 7 wherein a thickness of active film is in the range of about 0.05 mm to about 1.0 mm.
12. The method of claim 7 wherein the active film adheres to the foil solely by the heat and the pressure applied to the combination and without any additional adhesive materials.