In the last 30 years, plastics have become the most dominant engineering material for most products. We take a brief look at the most common types of plastics, and how they are processed.
All plastics are polymers; these polymers are further divided into two basic types: thermoplastics and thermosets. Thermoplastics melt when heated – so they can be melted and re-formed again and again.
Thermosets harden when they are heated, if heated further, they will break down chemically and lose their properties. Some thermosets have properties very similar to rubber, and are used as synthetic rubber; they are categorized as elastomers.
[read plastic molding brief lecture here...]
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