India has made great advances in the last decade in the polymer industry due to the increase in use of polymers, with Nylon being one of the most extensively used engineering materials in India. We have learnt the art of making plastic more durable and the industry has thus flourished.
The reason polymers are so easily used in many kinds of industries is due to their malleable nature. They can be designed for multifunctional purposes integrating multiple operations into a single injection molded part. It includes three fundamental processes: heating, reshaping, and cooling which form the base for every process whether it is molding or extrusion. There are few blow molded applications that are also coming up for fuel tank applications.
While India makes use of many techniques due to our extensive use of polymers, we have two methods which overshadow the others. The first commonly used process is injection molding which requires the polymer to be heated to melt and injected into a mould to make the desired shape and is then cooled.. Not only is this process highly efficient, but it also has many use cases, too. Most of the Polyamides are most commonly processed using this technique.
Extrusion is another commonly used processing technique. Material is heated in extruder to melt and forced through a die to form required shapes. Typical examples are monofilament, tubing and stock shapes. Window profiles are catching up where glass reinforcement is done to Polyamide. India Has about 40,000 Plastics processing units with approx 165,000 processing machine processing about 18,500 KT annually engaging about 2 m manpower.
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