Compostable single-cup brew lid

Abstract

A single-cup brew lid material comprises: a compostable printed layer; and a compostable layer that is sealable to PLA single-cup brew containers.

The invention claimed is: 
     
       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.