.:: Types of Degradable ::.
Four different types of degradable polymers, around the world, are in the market:-
Hydrodegradable polymers Some degradable plastic products are based on starch, and whilst non-food uses of agriculture may seem attractive, they are not the best way forward. Some of these plastics perforate over time but do not totally degrade, because the starch constituent is consumed by microbial activity, but not the plastic. The plastic residues can be harmful to the soil and to birds and insects.
Aliphatic Polyester These products have the same disadvantage as starch They are also expensive.
Photodegradable polymers are those that break down through the action of ultraviolet (UV)
light, which degrades the chemical bond or link in the polymer or chemical structure of the
plastic. This process can be assisted by the presence of UV-sensitive additives in the polymer. They will not therefore degrade if buried in a landfill, a compost heap, or other dark environment, or if heavily overprinted.
Oxo-biodegradable polymers are the most effective and economic of the new plastics is based on oxo-degradation and has become known as oxo-biodegradable, or "totally degradable," A special additive is included in the manufacturing process of conventional plastic, which changes the behavior of the plastic. This plastic that undergo controlled degradation through the incorporation of 'prodegradant' additives (additives that can trigger and accelerate the degradation process).
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