Using a thick walled steel inner core, BEP’s unique proposition is to replace the outer steel shell with a 16mm thick copper shell. Copper is used simply because its thermal coefficient of heat transfer is 10 times that of steel. This means that during the time the copper shell is in contact with the PE it can absorb up to 10 times more heat than a steel roll. This offers the prospect of dramatically reducing the contact time compared with a steel shell.

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