
‘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 te 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 micro organisms such as bacteria,
fungi and algae
The biodegradation of the submitted
plastic samples were tested using ASTMD 5209-91‘standard
test method for Determining the Aerobic Biodegradations
of Plastic Materials in the Presence of Municipal sewage
sludge ‘ ASTM D5338.98 ‘standard test method for
determining Aerobic Biodegradation of Plastic materials
(HIP) Tythester ® under controlled composting conditions
which is equivalent to CEN orEN Wl 261085 and the ISO
14855 method
Evaluation of the Ultimate Aerobic
Biodegradbility and Disintegration of plastics under
controlled Composting conditions ASTM 5511 ‘
Standard test methodfor determining anaerobic
biodegradation of plastic materials under high solids
anaerobic digestion conditions The results ofthese
tests and the related biogradation and ecological impact
experiments in various environments are contained in the
ecological assessment of ECM plastic report dated
febuary l6th l999 which certifies that plastic products
manufactured with ECM additions can be marketed as
biodegradable and safe for the environment. |