CEN Standard on energy recovery (EN 13431:2004)
Packaging claimed to be suitable for energy recovery must be combustible and capable of providing calorific gain (i.e.when the net heat of combustion exceeds the amount required to raise the temperature of the post-combustion substances from ambient temperature to the specified final temperature without heat leaving the system).
Also considered to be recoverable in the form of energy are:
- Packaging composed of over 50% by weight of organic materials (eg wood, board),
- Packaging composed of less than 50% of organic materials may be considered recoverable in the form of energy if supported by evidence of calorific gain.
- Thin gauge aluminium foil (up to 50 μm thick)
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