Pre-processing
✓ No drying needed
Hygroscopic — must dry before feeding
Must dry below 250ppm or it hydrolyzes
Blown Film
Density / yield per kg
0.98 g/cm³ ↑ +27–38%
1.25–1.35 g/cm³
1.24 g/cm³
Blown Film
Film processability
✓ Blows smoothly, no powder shedding, better moisture resistance
Sheds powder if incompatible, less moisture-resistant
Unstable bubble, prone to blowouts, needs modification
Injection
Flexural strength
✓ Resists snapping when cut
Starch is inherently brittle, snaps easily
Brittle, barely bends before breaking
Injection
Oil resistance
✓ Oil-resistant, non-stick, easy to clean
Acceptable oil resistance, softens in water
Smooth surface, resists sticking
Thermoform
Heat resistance
✓ -10 to 130°C, freezer-ready
Softens with heat, brittle when cold
Softens above 60°C, not hot-food safe
Thermoform
Compression resistance
✓ Stable structure, stacks well
Insufficient strength, warps with moisture
Hard but brittle, cracks at stress points