In 2003, using the Tier 1 tests in the proposed ASTM “Guide for Environmentally Oxo-biodegradable Plastics”, the Advanced Materials Center, Ottawa IL (AMC) studied the performance of oxo-degradable films at different temperatures and under high and low humidity conditions. For these tests, bags containing EPI’s TDPA (Totally Degradable Plastic Additives) were used. These were purchased from a distributor in the Northeast.
Tier 1 tests are designed to promote or accelerate oxidation of oxo-degradable materials prior to placing the materials in bio-meters to measure the rate of biodegradation. The loss of tensile strength is the signal that oxidation and chain scission are occurring. This step must take place prior to becoming able to be biodegraded.
Click here to read the BPI report on biodegradability claims of 'oxo-biodegradable' products