Material 10 % Starch
Starch can be used as biodegradable additive or replacement material in traditional oil-based commodity plastics.

If starch is added to petroleum derived polymers (e.g. PE), it allows disintegration of the blend, but not its biodegradability.
Category Biopolymers
Products Compostable bags
Environmen- tal notes Disposal: Starch can in theory accelerate the disintegration or fragmentation of the synthetic polymer chains.
Microbial action consumes the starch, thereby creating pores in the material, which weaken it and enable it to break apart.

Disintegration of starch-plastic blends is not the same as biodegradation.
Their breakdown, also under optimal conditions, is quite slow. Starch content needs to exceed 60% before significant material breakdown occurs.
Additional Info In 1993 LDPE-starch blends were commercialized under the trade name EcostarŪ
Photo Thomas Nissen (Computer graphics)
Copyright © 1996-2003 Torben Lenau
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