In order to realize the use of plastic bottles instead of glass bottles for beer packaging, many countries have increased their research on high-performance barrier materials. New results have emerged from time to time.
Nanotec and Mitsubishi Gas Chemical Corporation of Japan jointly developed PAXD6/nano-clay barrier M9, called Imperm, for the core of a three-layer PET bottle. Imperm is said to have a 100-fold lower oxygen transmission rate than PET, a 50% and 70% increase in carbon dioxide and oxygen barrier compared to standard PAMXD6, and a three-layer (PET/M9/PET) beer bottle with a shelf life of 180 days. .
US Honeywell is currently working on the development of a nylon nanocomposite Aegis OX with high barrier properties and cost as low as glass, which can reduce the oxygen transmission rate (OTR) of PA6 by 100 times, and the oxygen infiltration amount is almost. Zero. It is used as the core layer of a three-layer beer bottle, and its shelf life is 180 days.
Polyvinyl alcohol (PVA) membranes have a very high barrier to gases, and the barrier to oxygen is about 1000 times that of commonly used polyethylene membranes and 300 times that of polypropylene membranes. The barrier properties are comparable to EVOH but much cheaper. British Environmental Polymers Corporation announced that it has achieved a dry extrusion blown film.