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| www.d2w.asia: the biggest oxo-biodegradable product E-platform D2W® Oxo-biodegradable plastic passes the tests prescribed by "American Standard ASTM D6954 for Plastic that Degrade in the Environment by a Combination of Oxidation and Biodegradation" D2W® is a low cost additive for polyethylene and polypropylene which causes the plastic to break down into a biodegradable form (the long plastic chains break down into shorter chains which can then be accessed by micro organisms which break them down to carbon dioxide and water. Degradation reactions will start soon after the product is made, but the fact that the formulation contains a stabilizing package moderates these reactions so that outward signs of degradation such as loss of mechanical integrity should not be evident. This leads to the concept of an induction period for break down and thus a useful shelf life. D2W® additive works to break down the carbon-carbon bonds in the plastic leading to a lowering of the molecular weight and eventually to a loss of strength and other properties. The plastic does not just fragment, but is consumed by micro-organisms after the additive has reduced the molecular weight to sub 40,000 Daltons, and it is therefore "biodegradable." This process continues until the material has biodegraded to nothing more than CO2, water, humus, and trace elements. D2W® Oxo-biodegradable = Oxidation + Biodegradation Step 1: Oxo-degradation – is an abiotic/chemical stage which begins with the cleavage of carbon chain backbone in PE and PP into shorter chain molecules and the incorporation of oxygen into these molecules as organic functional groups (i.e.: carboxylic or hydro-carboxilic acids, esters as well as aldehydes and alcohols). The hydrocarbon polymers change their behaviour from hydrophobic to hydrophilic thereby allowing the fragmented polymer to absorb water. Step 2: Bio-degradation – is a microbiological stage in which biodegradation of the fragmented polymer takes place. The molecular weight of the polymer is reduced during the first step to levels that will allow bacteria, fungi and algae to consume the carbon backbone fragments into their trophic process. The end chemical products of the biodegradation step are CO2, H2O, a small quantity of minerals and biomass with no toxic or harmful residues to soil, plants or macro-organisms. D2W®Oxo-biodegradable plastic: • Does not leave fragments of petro-polymers in the soil • Passes all the standard eco-toxicity tests • Is safe for long-term contact with food • Does not contain organo-chlorine, PCBs or "heavy metals." • Does not emit methane or nitrous oxide, even deep in a landfill • Can be made from recyclate • Can be safely recycled • Can be composted in-vessel |
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