Simplest production workflow. PP pellets require no drying and are directly fed into machines.
Integrated injection molding at 180–230°C forms container and lid in one piece, cooled rapidly by water. Trimming scraps can be crushed and recycled on site.
Only Class 300,000 cleanroom required; mold change takes 1–2 hours with low equipment investment, mainly for fast food takeaway.
CPET pellets must be dried at 160°C for over 4 hours to avoid hydrolysis. Extruded at 260–280°C with precise temperature control for full crystallization to withstand 220°C heating.
Dedicated independent constant-temperature & low-humidity production line (cannot share equipment with PP lines). Mold change takes 4–8 hours; scraps cannot be directly recycled inline. Mainly used for frozen ready meals and airline catering.
Seal food in Class 10,000 cleanrooms via MAP equipment: evacuate air, inject customized mixed protective gas, heat-seal high-barrier film.
Extra supporting facilities: explosion proof gas storage, online residual oxygen detectors and cold chain warehouses. Highest production cost, applied for chilled meat and fresh ready-to-cook meals.
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