1. thermoset - Noun
2. thermoset - Adjective
having the property of becoming permanently hard and rigid when heated or cured
Source: WordNetthe phenol resins and plastics were the original synthetic thermosetting materials Source: Internet
A key step in the development of synthetic plastics was the introduction of a thermoset plastic known as Bakelite phenolic in 1910.sfn Within two years, phenolic resin was applied to plywood as a coating varnish. Source: Internet
However, the vast majority of DIPs are manufactured via a thermoset molding process in which an epoxy mold compound is heated and transferred under pressure to encapsulate the device. Source: Internet
Original M16 stocks were made from fiberglass-impregnated resin; the newer stocks were engineered from DuPont Zytel glass-filled thermoset polymers. Source: Internet
Thermosets cannot be melted, therefore, once a thermoset has set it is impossible to weld it. Source: Internet