Methods for making paperboard blanks and paperboard products therefrom
View Patent ↗Methods for making paperboard blanks and paperboard products therefrom are provided. In one aspect, a method for making a paperboard blank can include burning a paperboard substrate to form at least one aperture therethrough. The method can also include securing a film onto a first side of the paperboard substrate to produce a paperboard blank.
1. A paperboard product, comprising:
a sidewall formed from a paperboard blank; and
a bottom panel secured to the sidewall, wherein the sidewall comprises:
an inner surface comprising a film; and
an outer surface comprising a paperboard substrate, wherein the paperboard substrate has at least one aperture formed therethrough, and wherein the at least one aperture is formed by burning a portion of the paperboard substrate.
2. The paperboard product of claim 1 , wherein the paperboard substrate is burned with a laser beam.
3. The paperboard product of claim 1 , wherein the film is a shrinkable film.
4. The paperboard product of claim 3 , wherein the shrinkable film comprises a biaxially oriented heat shrinkable polymeric material.
5. The paperboard product of claim 1 , wherein the sidewall further comprises a brim formed by curling a first edge of the sidewall.
6. The paperboard product of claim 1 , wherein the film is secured to the paperboard substrate with an adhesive.
7. The paperboard product of claim 1 , wherein the paperboard substrate comprises at least a first outer layer, a second outer layer, and an intermediate layer, wherein the first and second outer layers comprise polyethylene, and wherein the intermediate layer comprises a paperboard.
8. The paperboard product of claim 7 , wherein the film is secured to the paperboard substrate by heat sealing the film to the paperboard substrate.
9. The paperboard product of claim 1 , wherein the at least one aperture has a cross-sectional area of about 0.005 mm 2 to about 1 mm 2 .
10. A method for making a paperboard product, comprising:
burning a paperboard substrate to form at least one aperture therethrough;
securing a film onto the paperboard substrate to produce a paperboard blank;
forming the paperboard blank to overlap two opposing edges of the paperboard blank to form a sidewall, wherein the sidewall comprises:
an inner surface comprising the film,
an outer surface comprising the paperboard substrate, and
a first edge adapted to be curled to form a brim curl, and
securing a bottom panel to the sidewall at or adjacent a second edge of the sidewall; and
curling the first edge of the sidewall to form the brim curl.
11. The method of claim 10 , wherein the paperboard substrate is burned with a laser beam.
12. The method of claim 10 , wherein the film is a shrinkable film.
13. The method of claim 10 , wherein the film is secured to the paperboard substrate with an adhesive.
14. The method of claim 10 , wherein burning the paperboard substrate completely removes a portion of the substrate to form the at least one aperture.
15. The method of claim 10 , wherein the at least one aperture has a cross-sectional area of about 0.005 mm 2 to about 1 mm 2 .
16. The method of claim 10 , wherein the film is a shrinkable film, and wherein the sidewall and the bottom panel define a product volume adapted to contain a liquid, the method further comprising selecting a shrinkable film in which an area of the shrinkable film decreases in an amount of about 10% to about 40% when a liquid at a temperature of up to about 100° C. is introduced into the product volume.
17. The method of claim 10 , wherein the film is a shrinkable film, and wherein the sidewall and the bottom panel define a product volume adapted to contain a liquid, the method further comprising selecting a shrinkable film that will shrink when a liquid at a temperature of about 70° C. to about 100° C. is introduced into the product volume, and wherein the outer surface of the sidewall remains at a temperature of about 44° C. or less after the liquid is introduced to the product volume.
18. The method of claim 10 , wherein the film is a shrinkable film, the method further comprising selecting a shrinkable film that shrinks when contacted with a fluid at a temperature of about 70° C. to about 100° C. to provide a paperboard container having a shrunk film and a gap located between at least a portion of the shrunk film and the paperboard substrate.
19. A paperboard product, comprising:
a sidewall formed from a paperboard blank; and
a bottom panel secured to the sidewall,
wherein the sidewall comprises:
an inner surface comprising a shrinkable film; and
an outer surface comprising at least a first outer layer, a second outer layer, and an intermediate layer, wherein the first and second outer layers comprise polyethylene, and the intermediate layer comprises a paperboard,
wherein the sidewall has at least one aperture formed therethrough, and the at least one aperture is formed by burning a portion of the sidewall, and wherein the shrinkable film shrinks at a temperature of at least 70° C. to provide a gap between at least a portion of the shrunk film and the outer surface.
20. The paperboard product of claim 19 , wherein the sidewall is burned with a laser beam to form the at least one aperture.
21. The paperboard product of claim 19 , wherein the shrinkable film comprises a biaxially oriented heat shrinkable polymeric material.
22. The paperboard product of claim 19 , wherein the sidewall further comprises a brim formed by curling a first edge of the sidewall.
23. The paperboard product of claim 19 , wherein the film is secured to the outer surface of the sidewall with an adhesive.
24. The paperboard product of claim 19 , wherein the film is secured to the outer surface of the sidewall by heat sealing the film to the outer surface.
25. The paperboard product of claim 19 , wherein the at least one aperture has a cross-sectional area of about 0.005 mm 2 to about 1 mm 2 .
26. The paperboard product of claim 19 , wherein the at least one aperture is located near a top of the sidewall.