... & CE standard 3.Can Make Tray, Food box.. PS Foam Food Box Making Machine (YTTH-1100X1250)It can make ps ... foam tray,foam burger box, foam fast food box, foam egg tray, foam bowl and ... ). In the extruding process, foam agent (such as butane gas or LPG) is injected at high pressure. After extruding , ... more than 15 years in the PS foam food box making machine field. Our machine are of good ...