US 2024/0181750 A1 · LAMINATED CAN END STOCK

Abstract

Provided herein are an aluminum can end stock (CES) and methods for producing CES. The CES includes a laminated metal strip having a polymer film coating and beneficially exhibiting low feathering, low hairing, and high abrasion resistance. The laminated metal strip can include the laminated polymer coating on an exterior-facing side and a lacquered coating on an interior-facing side. The CES is formed by laminating a polymer film to a side of the metal strip and annealing the laminated metal strip. In some cases, the polymer film laminated to the metal strip is a polyethylene terephthalate (PET) film, which may be colored.

Claims23

Dependent claims

A process for preparing can end stock, comprising:

pre-heating a metal strip to a first temperature below 250° C.;
laminating a polymer film to a first side of the metal strip to produce a laminated metal strip, wherein the first side of the metal strip corresponds to an exterior-facing side of a can end formed from the metal strip;
and
annealing the laminated metal strip at an annealing temperature, wherein the annealing temperature is greater than 175° C.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

18/556,164Filed 13 Apr 2022

Priority

22 Apr 2021

Published

6 Jun 2024

Term ends

Not estimatedThe source records don’t support an estimate.

Classification17 codes

B32B 15/20
Layered products comprising a layer of metal: comprising aluminium or copper
B21D 35/007
Characterized by the material of the blank or the workpiece: layered blanks
B21D 51/26
Characterised by the use of the objects: cans or tins; Closing same in a permanent manner
B32B 15/09
Of synthetic resin: comprising polyesters

Laminated can end stock

Life of this patent

Laminated can end stock

Life of this patent

Abstract

Claims23