Void fraction of cellulose reinforced PLA foams as a function the fibre content: ■ 20 wt%; □ 30 wt% (PLA7000D, 3 wt% CBA2 for biocomposites foams, 4 wt% CBA2 for PLA foam, temperature profile A, screw speed 30 rpm, die temperature 195°C, free cooling).
