The 400ml pack, supplied to manufacturer Symingtons by RPC Containers Blackburn, has been selected in preference to glass due to its ambient shelf life of up to 24 months, combined with glass-like transparency and the added in-home safety of a non-shatter container.
SuperLock containers combine an oxygen barrier on all surfaces, with a membrane seal to ensure an almost nonexistent oxygen transmission rate.
The barrier is created through the use of an in-mould labelling (IML) technique. Labels are manufactured using a special co-extruded barrier foil and are applied during the injection moulding of the containers. After filling, the containers are sealed with a PP/EVOH/PP membrane seal.
Together, the two processes ensure virtually zero oxygen transmission to provide an ambient shelf life of up to 24 months. They are suitable for hot filling and autoclaving during processing. An additional filling line benefit is that the process is far quieter than other materials.
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