Ceepackaging

Technology

Methods being taken to ensure the quality of multilayer film

40% of defects originate during pellet transport, 25% in the resin (either the recipe or contamination) and 15% of problems arise during processing. OCS Optical Control Systems is developing technology for monitoring defects and feeding the results back into the production process including the raw material supply system, according to the specification for each film type, from optical sheets to food films.

One area where quality control is critical is in the pharmaceutical industry. Amcor Flexibles works in this sector and produces active pharma packaging with a desiccant. The outer film layer is OPA at 25 microns, the next layer is aluminium at 45 microns and the inner layer is PE. Dessicant particles can be incorporated into the inner layer to inhibit cross diffusion and keep moisture to a minimum in cold form blisters. Calcium oxide is the active component and it is blended into a mineral-filled, blue PE masterbatch, which is then coated onto aluminium foil. Formpack Dessiflex has been shown to keep the blister cavity dry for more than 5 years at 40C/75% r.h.