Patent · US Active

Laminated can end stock with elevated temperature annealing

US11241871B2 · kind B2 · utility

0Cited by

6References

32Claims

0Family size

Assignee

Novelis Inc. · US

Inventors

Peter Spahn · Darmstadt, DE
Heinrich Prinzhorn · Göttingen, DE
Nicolas Kamp · Uslar, DE
Dhiren Bhupatlal Ruparelia · Göttingen, DE

Key dates

Filing date	May 5, 2017
Grant date	Feb 8, 2022
Priority date	—
Expiry date	Apr 4, 2039

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB32B2439/70
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

Improved aluminum can end stock (CES) is disclosed. The CES includes a laminated, amorphous polymer coating exhibiting low feathering, low blushing, and high performance in an acetic acid test. The laminated metal strip can include the laminated polymer coating on an interior-facing side and a lacquered coating on an exterior-facing side. The CES is formed by performing an annealing process on the laminated metal strip, wherein the metal strip is raised to an annealing temperature above the melting point of the polymer for a sufficient duration to render the polymer amorphous. In some cases, the polymer film laminated to the metal strip is a Polyethylene terephthalate (PET) film.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.