noun
polystyrene resin
Technical term for polystyrene, a common plastic used in packaging, insulation, and consumer products.
スチロール樹脂は断熱材としてよく使われる。
Polystyrene resin is often used as insulation material.
ポリスチレン is the direct loanword for polystyrene, while スチロール樹脂 is a Japanese-coined compound using スチロール (styrol) and 樹脂 (resin).
Compound of スチロール (styrol, from German 'Styrol') and 樹脂 (resin).