Multi-layer container
One embodiment of the present invention provides a partly-biodegradable system, which comprises a non-biodegradable portion and a biodegradable portion wherein the non-biodegradable portion is easily separated from the biodegradable portion for disposal of the system. In certain embodiments, the system further comprises a cover layer of non-biodegradable film which adheres to the first non-biodegradable portion to form a sealed compartment for food or drink reservation.
1. A container comprising:
a first portion having a substantially biodegradable starch matrix; and
a second portion comprising a non-biodegradable film adhering to the inner surface of the first portion,
wherein the bond strength between the first portion and the second portion is from about 0.5 pounds per inch width to about 4.5 pounds per inch width.
2. The container of claim 1 further comprising a third portion comprising a non-biodegradable film adhering to the second portion to form a cavity between the second portion and the third portion, wherein the third portion can be easily separated from the second portion prior to separation of the second portion from the first portion.
3. The container of claim 1 wherein the first portion comprises:
water;
starch; and
fibers.
4. The container of claim 1 wherein the second portion provides moisture resistance or oxygen barrier properties suitable for food packaging applications.
5. The container of claim 1 where the first portion and the second portion are directly adhered together.
6. The container of claim 1 where the first portion and the second portion are indirectly adhered together.
7. The container of claim 1 further comprising a third portion including a non-biodegradable film, wherein the third portion adheres to at least a part of the second portion.
8. A container comprising:
a substrate comprising starch-based matrix; and
a liner comprising one or more polymers,
wherein the liner is adhered to the substrate and the bond strength between the substrate and the liner is from about 0.5 pounds per inch width to about 4.5 pounds per inch width.
9. The container of claim 8 wherein the bond strength between the substrate and the liner is from about 1 pounds per inch width to about 4.5 pounds per inch width.
10. The container of claim 8 wherein the liner is peelable from the substrate without cohesive failure within the liner.
11. The container of claim 8 wherein the liner is directly adhered to the substrate.
12. The container of claim 8 wherein the liner is indirectly adhered to the substrate.
13. The container of claim 8 further comprising a cover, wherein at least a portion of the cover is adhered to the liner.
14. The container of claim 8 wherein the bond strength between the substrate and the liner is from about 2 pounds per inch width to about 4.5 pounds per inch width.
15. The container of claim 8 wherein the bond strength between the substrate and the liner is from about 0.5 pounds per inch width to about 3 pounds per inch width.
16. The container of claim 8 wherein the bond strength between the substrate and the liner is from about 0.5 pounds per inch width to about 2 pounds per inch width.
17. The container of claim 8 wherein the bond strength between the substrate and the liner is from about 1 pounds per inch width to about 2.5 pounds per inch width.
18. A container comprising:
a substrate comprising starch-based matrix; and
a liner comprising one or more polymers, wherein the one or more polymers are selected from the group consisting of polyethylene, polyethylene/vinyl acetate, amorphous polyethylene terephthalate, polyamide-6, Surlyn and polyester,
wherein the bond strength between the substrate and the liner is from about 0.5 pounds per inch width to about 4.5 pounds per inch width.
19. The container of claim 18 wherein the liner comprises a multilayer film.
20. The container of claim 18 wherein the bond strength between the substrate and the liner is from about 1 pounds per inch width to about 3 pounds per inch width.