Compostable single-cup brew lid
A single-cup brew lid material comprises: a compostable printed layer; and a compostable layer that is sealable to PLA single-cup brew containers.
1. A single-brew cup lid material comprising:
a compostable printed layer; and
a compostable layer that can is adapted to be sealed to PLA single-brew cups,
wherein:
the compostable layer that can be sealed to PLA single-brew cups comprises a PLA-based film and a compostable core layer, the compostable core layer being disposed between the PLA-based film and the compostable printed layer;
the compostable core layer is aliphatic copolyester; and
the compostable core layer is a compostable film secured to the compostable printed layer and the PLA-based film by adhesive; and
the material has the following properties:
ink adhesion
100% ink adhesion using Scotch 610 Tape
heat and blister resistance
no visible blistering or ink pick-off when
sealed at 150° C., 1 sec dwell time, 40 psi
interlayer bond strength
>100 g/25 mm
Elmendorf (propagated)
>150 g both machine direction and
tear resistance
transverse direction
Heat seal strength, lid to cup
>1000 g/25 mm, lid sealed against the rim
of a PLA cup, 15 C., 1 sec dwell
time, 40 psi.
2. A material according to claim 1 , wherein the compostable printed layer is printed paper.
3. A material according to claim 1 , wherein the compostable printed layer is reverse-printed cellulose.
4. A material according to claim 1 , wherein the PLA-based film is metallized.
5. A material according to claim 1 , wherein the compostable core layer is a compostable extrudate.
6. A material according to claim 1 , wherein
the PLA-based film is about a 20 micron metallized PLA film; and
the compostable core layer is a 3 mil aliphatic copolyester film.
7. A material according to claim 6 , wherein the compostable printed layer is a layer of printed 21#/ream paper.
8. A material according to claim 7 , wherein the compostable core layer is secured to the printed paper by about 1.5 gsm acrylic adhesive and to the PLA-based film by about 1.0 gsm urethane adhesive.
9. A material according to claim 1 , having the following properties:
Ink adhesion: 100% ink adhesion using Scotch 610 tape
Heat and blister resistance: no visible blistering or ink pick-off when sealed at 150° C., 1 sec dwell time, 40 psi
Interlayer bond strength: >100 g/25 mm
Elmendorf (propagated)
tear resistance: >150 g both machine direction and transverse direction
Heat seal strength, lid to cup: >1000 g/25 mm, lid sealed against the rim of a PLA cup, 150′ C., 1 sec dwell time, 40 psi.
10. A single-brew cup lid material comprising:
a compostable printed layer; and
a compostable layer that can is adapted to be sealed to PLA single-brew cups,
wherein
the compostable layer that can be sealed to PLA single-brew cups comprises a metallized PLA-based film and a compostable core layer, the compostable core layer being disposed between the PLA-based film and the compostable printed layer the PLA-based film is metallized;
the compostable core layer is a compostable film secured to the PLA-based film and the compostable printed layer by adhesive; and
the compostable core layer is an aliphatic copolyester; and
the material has the following properties:
ink adhesion
100% ink adhesion using Scotch 610 Tape
heat and blister resistance
no visible blistering or ink pick-off when
sealed at 150° C. 1 sec dwell time. 40 psi
interlayer bond strength
>100 g/25 mm
Elmendori (propagated)
>150 a both machine direction and
tear resistance
transverse direction
Heat seal strength, lid to cup
>1000 g/25 mm, lid sealed against
the rim of a PLA cup, 150° C. 1 sec
dwell time, 40 psi.
11. A material according to claim 10 , wherein the compostable printed layer is printed paper.
12. A material according to claim 10 , wherein the compostable printed layer is reverse-printed cellulose.
13. A material according to claim 10 , wherein the compostable core layer is a compostable extrudate.
14. A material according to claim 13 , wherein
the PLA-based film is about a 20 micron metallized PLA film; and
the compostable core layer is a 3 mil aliphatic copolyester film.
15. A material according to claim 14 , wherein the compostable printed layer is a layer of printed 21#/ream paper.
16. A material according to claim 15 , wherein the compostable core layer is secured to the printed paper by about 1.5 gsm acrylic adhesive and to the PLA-based film by about 1.0 gsm urethane adhesive.
17. A material according to claim 10 , having the following properties:
Ink adhesion: 100% ink adhesion using Scotch 610 tape
Heat and blister resistance: no visible blistering or ink pick-off when sealed at 150° C., 1 sec dwell time, 40 psi
Interlayer bond strength: >100 g/25 mm
Elmendorf (propagated)
tear resistance: >150 g both machine direction and transverse direction
Heat seal strength, lid to cup: >1000 g/25 mm, lid sealed against the rim of a PLA cup, 150′ C., 1 sec dwell time, 40 psi.
18. A single-brew cup lid material comprising:
a compostable printed layer;
a sealable, compostable film that is adapted to be sealed to PLA single-brew cups; and
a compostable film disposed between the sealable, compostable film and the printed layer and secured to each by adhesive,
the material having the following properties:
ink adhesion
100% ink adhesion using Scotch 610 Tam
heat and blister resistance
no visible blistering or ink pick-off when
sealed at 150° C. 1 sec dwell time, 40 psi
interlayer bond strength
>100 g/25 mm
Elmendorf (propagated)
>150 a both machine direction and
tear resistance
transverse direction
heat seal strength, lid to cup
>1000 g/25 mm, lid sealed against
the rim of a PLA cup. 150° C. 1 sec
dwell time, 40 psi,
19. A material according to claim 18, wherein the sealable compostable film comprises polyester and PLA.
20. A material according to claim 18, wherein the compostable printed layer is printed paper.
21. A material according to claim 18, wherein the compostable printed layer is reverse-printed cellulose.
22. A material according to claim 18, wherein the compostable film is aliphatic copolyester.
23. A material according to claim 22, wherein the copolyester film is secured to the printed layer by about 1.5 gsm acrylic adhesive and to the polyester-based film by about 1.0 gsm urethane adhesive.