BIODEGRADABLE LAMINATED SHEETS

Abstract

Provided is a biodegradable laminated structure comprising a substrate and a tie layer, wherein said tie layer is selected from the group consisting of PBSA, PBS, PBAT and a mixture of PCL with PLA and combinations thereof. The laminated structure may comprise two, three, four, five or more layers and may be coated or uncoated.

Description

Claims

1. A biodegradable laminated structure comprising a substrate and a tie layer, wherein said tie layer comprises a polymer selected from the group consisting of PBSA, PBS, PBAT and a mixture of PCL with PLA and combinations thereof.

2. The biodegradable laminated structure of claim 1, wherein said substrate is selected from the group consisting of paper, cellulose and combinations thereof.

3. The biodegradable laminated structure of claim 1, wherein the structure is a 2 ply structure consisting of said substrate and said tie layer.

4-6. (canceled)

7. The biodegradable laminated structure of claim 1, wherein the structure is a 3 ply structure consisting of said substrate; a sealing sheet comprising a sealing sheet outer layer and a sealing sheet second outer layer; and a tie layer provided between said substrate and said sealing sheet.

8-9. (canceled)

10. The biodegradable laminated structure of claim 1, wherein the structure is a 4 ply structure consisting of said substrate, a sealing sheet, an intermediate layer provided on said sealing sheet, and a tie layer provided between said substrate and said intermediate layer.

11. (canceled)

12. The biodegradable laminated structure of claim 1, wherein the structure is a 5 ply structure consisting of said substrate, a first tie layer provided on said substrate, a sealing sheet, a second tie layer provided on said sealing sheet, and an intermediate layer provided between said first tie layer and said second tie layer.

13. (canceled)

14. The biodegradable laminated structure claim 1, wherein said tie layer comprises PBSA and further comprises PLA.

15. The biodegradable laminated structure of claim 14, wherein said tie layer comprises from 65 wt% to 85 wt% PBSA and from 15 wt% to 35 wt% PLA.

16-17. (canceled)

18. The biodegradable laminated structure of claim 1, wherein said mixture of PCL with PLA comprises from 50 wt% to 80 wt% PLA and from 20 wt% to 50 wt% PCL.

19. (canceled)

20. The biodegradable laminated structure of claim 1, wherein said tie layer comprises 100 wt% PBAT.

21. The biodegradable laminated structure of claim, comprising a sealing sheet having an outer layercomprising a polymer selected from the group consisting of PBSA, PBS, PBAT and a mixture of PCL with PLA and combinations thereof.

22. The biodegradable laminated structure of claim 21, wherein sealing sheet outer layer comprises PBSA and further comprises PLA.

23-26. (canceled)

27. The biodegradable laminated structure of claim 21, wherein said sealing sheet outer layer comprises 100 wt% PBSA.

28. The biodegradable laminated structure of claim 21, wherein said sealing sheet outer layer comprises 100 wt% PBAT.

29. The biodegradable laminated structure according to claim 1, comprising a sealing sheet having a core layer comprising a polymer selected from the group consisting of PBSA, PBS, PBAT and a mixture of PCL with PLA and combinations thereof.

30. The biodegradable laminated structure of claim 29, wherein said sealing sheet core layer comprises PBSA and further comprises PLA.

31-36. (canceled)

37. The biodegradable laminated structure of claim 21, wherein said sealing sheet further comprises a second outer layercomprising a polymer selected from the group consisting of PBSA, PBS, PBAT and a mixture of PCL with PLA and combinations thereof.

38-44. (canceled)

45. The biodegradable laminated structure of claim 10, wherein said intermediate layer comprises cellulose.

46. The biodegradable laminated structure of claim 12, wherein said second tie layer is selected from the group consisting of PBSA and PBAT.

47. (canceled)