The first thing to remember is that full-squeeze labels must be flexible, so conformability is a must. Polyethylenes tend to be the films of choice, although some polypropylenes are also up to the task. Vinyls can work as well, but due to cost are only chosen if a unique visual characteristic is desired that can’t be achieved any other way.
LABEL DESIGN AND PLACEMENT
Secondly, proper label design is critical. The label artwork should be positioned so that the label will come at least a quarter of an inch around the crimp edge of the tube. Furthermore, the label width should allow for at least a quarter of an inch of overlap. Designing to these guidelines will alleviate stress on the crimp edge of the film to help prevent snapback and lifting.
Of course, the design can only take you so far. When applied, the back side of the label should overlap the crimp edge of the label, rather than the other way around, in order to help hold down the crimp edge. Also, be aware of any labels that are applied off-center or tubes that are not placed properly into the crimper. In either case, the label could end up positioned so that the edge is too close to the crimp edge of the tube. If this occurs, the extra stress on the edge of the label could cause a failure.