thermosetting material
Technical term used in materials science and engineering, especially for plastics and resins that harden irreversibly when heated.
Thermosetting materials undergo a chemical change and harden when heated.
熱可塑性樹脂 (thermoplastic resin) softens when heated and can be remolded, while 熱硬化物 hardens irreversibly.
Compound of 熱 (heat), 硬化 (hardening), and 物 (material). The term is a modern technical coinage.