Certificate of
Biodegradability of PPI 4-20™ Products

This is to certify that numerous plastic samples have been tested by independent laboratories in accordance with standard test methods and procedures approved by ASTM, ISO and other such standardization bodies to determine the rate and extent of biodegradation of PPI 4-20™ products.

A Degradable Plastic is defined (ASTM 1991) as a plastic that is designed to undergo a significant change in its chemical structure under specific environmental conditions resulting in a loss of some properties that may vary as measured by standard test methods appropriate to the plastic and the application in a period of time that determines its classification.  A Biodegradable Plastic is defined as a degradable plastic in which the degradation results from the action of naturally occurring microorganisms such as bacteria, fungi, and algae.

The biodegradation of the submitted plastic samples were tested using ASTM D5209-91, “Standard Test Method for Determining the Aerobic Biodegradation of Plastic Materials in the Presence of Municipal Sewage Sludge”, ASTM D5338.98, “Standard Test Method for Determining Aerobic Biodegradation of Plastic Materials under Controlled Composting Conditions”, which is equivalent to CEN PREN WI 261085, and the ISO 14855 method, “Evaluation of the Ultimate Aerobic Biodegradability and Disintegration of Plastics under Controlled Composting Conditions”, and ASTM 5511, “Standard Test Method for Determining Anaerobic Biodegradation of Plastic Materials Under High Solids Anaerobic Digestion Conditions.”