yongprapat kamonchai, Chaimoon N, Ongwandee M. Utilization of PU Foam Insulation Waste to Air Purifier Filter. NUEJ [internet]. 2021 Jun. 18 [cited 2026 Sep. 11];16(1):64-72. available from: https://ph01.tci-thaijo.org/index.php/nuej/article/view/240866