Valve for a packaging container

1. A valve for a packaging container, comprising at least one base film ( 10 ) with an opening ( 11 ), at least one frame film ( 13 ) encompassing a free region ( 17 ), and at least one membrane ( 12 ) which is arranged on the base film ( 10 ) and covers the opening ( 11 ), wherein a fluid is provided between the membrane ( 12 ) and the base film ( 10 ),

wherein the membrane ( 12 ) is connected to a surrounding film ( 20 ) via at least one connection region ( 22 ), the surrounding film ( 20 ) being connected on one side to the base film ( 10 ) and on its other side to the frame film ( 13 ), wherein the membrane ( 12 ) is arranged movably within the free region ( 17 ), wherein the surrounding film ( 20 ) includes an outer perimeter, and wherein the outer perimeter of the surrounding film ( 20 ) is open at least in one point such that a channel ( 18 ) is formed in the surrounding film ( 20 ).

2. The valve according to claim 1 , wherein the connection region ( 22 ) is arranged opposite the channel ( 18 ).

3. The valve according to claim 1 , wherein the surrounding film ( 20 ) encompasses the membrane ( 12 ) at least partially in a circular shape or in a U shape.

4. The valve according to claim 1 , wherein the membrane ( 12 ) is implemented in a circular shape.

5. The valve according to claim 1 , wherein the base film ( 10 ), the frame film ( 13 ) and the membrane ( 12 ) are equally usable and/or arrangeable within a packaging container or outside a packaging container.

6. The valve according to claim 1 , wherein a thickness of the frame film ( 13 ) is greater than a thickness of the membrane ( 12 ).

7. The valve according to claim 6 , wherein the thickness of the frame film ( 13 ) is greater than the thickness of the membrane by 75% to 225%.

8. The valve according to claim 1 , wherein at least one cover film ( 15 ) is provided, which is connected to the frame film ( 13 ).

9. The valve according to claim 8 , wherein the base film ( 10 ) and/or the frame film ( 13 ) and/or the cover film ( 15 ) are/is implemented of polypropylene, PP-EVOH-PP, OPP, PET, polyolefin or of a synthetic material.

10. The valve according to claim 9 , wherein the base film ( 10 ) and/or the frame film ( 13 ) and/or the cover film ( 15 ) are/is made of sustainable raw materials or of bio-degradable synthetic materials.

11. The valve according to claim 8 , wherein the frame film ( 13 ) is connected to the base film ( 10 ) and/or to the cover film ( 15 ) via a welding connection.

12. The valve according to claim 11 , wherein the frame film ( 13 ), the base film ( 10 ), and/or the cover film ( 15 ) are laminated together.

13. The valve according to claim 1 , wherein the frame film ( 13 ) includes an outer perimeter, and wherein the outer perimeter of the frame film ( 13 ) is open at least in one point such that a channel ( 18 ) is formed in the frame film ( 13 ).

14. The valve according to claim 13 , wherein the channel ( 18 ) formed in the frame film ( 13 ) and the channel ( 18 ) formed in the surrounding film ( 20 ) connect to form a passageway connecting the opening ( 11 ) to an ambient region surrounding the valve ( 8 ).

15. The valve according to claim 14 , wherein at least one cover film ( 15 ) is connected to the frame film ( 13 ), and wherein the channel ( 18 ) formed in the frame film ( 13 ) and the channel ( 18 ) formed in the surrounding film ( 20 ) are located between the base film ( 10 ) and the at least one cover film ( 15 ).

16. The valve according to claim 1 , wherein the channel ( 18 ), viewed in a main extension plane of the surrounding film ( 20 ), forms a material-free interruption in the outer perimeter of the surrounding film ( 20 ).