EN 15421:2007 – Packaging – Flexible aluminium tubes – Determination of the adhesion of the internal and external protective lacquering

1 Scope
This standard specifies a method for the determination of the adhesion of the internal and external protective lacquer of aluminium tubes.
It is applicable to aluminium tubes that are coated with an internal or external protective lacquer and which are used for packing, e.g. pharmaceutical, cosmetic, hygiene, food and other household products.
2 Principle
By means of a compressing device the tube is compressed to a defined extent and under defined temperature conditions to create a standardized and sharp-edged deformation of the tube. The kinks are checked visually for any cracks and/ or delamination of internal or external lacquer.
3 Apparatus
Compressing device according to Figure 1 (example).
EN 15421:2007 – Packaging – Flexible aluminium tubes – Determination of the adhesion of the internal and external protective lacquering