Renewability

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Renewability

Most biopolymers are based on renewable raw materials such as corn, potatoes or wheat. NatureFlex™ films are based on cellulose which is the most abundant of all naturally occurring organic materials. NatureFlex™ films are produced from wood pulp sourced from managed plantations.

The biobased content of a range of NatureFlex™ films has been determined according to  ASTM D6866, which is based on radiocarbon methodology. Because of the half life of ¹⁴C, fossil or ‘old’ carbon no longer contains ¹⁴C and so any ¹⁴C present must have been derived from ‘new’ or biobased carbon. The amount of radiocarbon (¹⁴C) is determined by comparison with a modern reference standard and is reported as a percentage.

Depending on the grade of NatureFlex™ , the biobased content can vary from 90% to 99%. A typical result is shown below.