Heat sealable barrier coatings for paperboard
AssigneeGeorgia-Pacific Bleached Board LLC
InventorsLori Jeanne Fortin, Kathryn Lynn Veith
Life of this patent
Estimating the term…
Abstract
A paperboard blank and cup made therefrom are provided. The blank includes a paperboard substrate having a first side and a second side. A first polymer layer can be disposed on at least a portion of the first side of the paperboard substrate, and a second polymer layer can be disposed on at least a portion of the second side of the paperboard substrate. Both the first and second polymer layers can include at least one polymer component that is thermoplastic. The second polymer layer further comprises at least one polymer component, which is not present in the first polymer layer, and has a glass transition temperature higher than all the polymer components of the first polymer layer.
Claims28
A paperboard blank, comprising:
- a paperboard substrate having a first side and a second side;
- a first polymer layer disposed on at least a portion of the first side of the paperboard substrate;
- and
- a second polymer layer disposed on at least a portion of the second side of the paperboard substrate, wherein both the first and second polymer layers comprise at least one polymer component that is thermoplastic, and the second polymer layer further comprises a polymer component not present in the first polymer layer that has a glass transition temperature that is at least 5° F. higher than the glass transition temperature of any polymer component of the first polymer layer.
A paperboard blank, comprising:
- a paperboard substrate having a first side and a second side;
- a first polymer layer disposed on at least a portion of the first side of the paperboard substrate;
- and
- a second polymer layer disposed on at least a portion of the second side of the paperboard substrate, wherein both the first and second polymer layers comprise at least one polymer component that is a styrene acrylic, and the second polymer layer further comprises a polymer component that has a glass transition temperature that is at least 15° F. higher than the polymer components of the first polymer layer.
A cup, comprising:
- a sidewall having a first side and a second side, wherein a first polymer layer is disposed on at least a portion of the first side of the sidewall, and a second polymer layer is disposed on at least a portion of the second side of the sidewall,
- wherein both the first and second polymer layers comprise at least one polymer component that is thermoplastic, and the second polymer layer further comprises a polymer component not present in the first polymer layer that has a glass transition temperature that is at least 5° F. higher than the glass transition temperature of any polymer component of the first polymer layer.
A cup, comprising:
- a sidewall having a first side and a second side;
- and
- a bottom panel secured proximate a lower edge of the sidewall, wherein a first polymer layer is disposed on the first side of the sidewall, and a second polymer layer is disposed on at least a portion of the bottom panel that contacts the edge of the sidewall having the first polymer layer disposed thereon, and
- wherein both the first and second polymer layers comprise at least one polymer component that is thermoplastic, and the second polymer layer further comprises a polymer component not present in the first polymer layer that has a glass transition temperature that is at least 5° F. higher than the glass transition temperature of any polymer component of the first polymer layer.
Dependencies are inferred from the claim text.