Glossary

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Termsort icon Definition
Thermoforming

The process of heating a thermoplastic sheet and forming it into a finished shape by means of heat or pressure.
Thermoplastic

Materials that will repeatedly soften when heated and harden when cooled. Typical of the thermoplastic family are the styrene polymers and copolymers, acrylics, cellulosics, polyethylenes, polypropylene, vinyl and nylons.
Thermoset

A material that will undergo or has undergone a chemical reaction through the application of heat and pressure, catalysts, ultraviolet light, etc., leading to a relatively infusible state. Typical of the plastics in the thermosetting family are the aminos (melamine and urea), most polyesters, alkyds, epoxies, and phenolics.