Material comparison
PP vs HDPE
Both are chemical-resistant polyolefins. PP handles higher temperatures (microwave, hot-fill) and is stiffer; HDPE is tougher at low temperature with outstanding stress-crack resistance.
PP vs HDPE — side by side
| PP | HDPE | |
|---|---|---|
| Temperature | Higher (microwave/hot-fill) | Lower |
| Stiffness | Higher | Lower, more flexible |
| Low-temp toughness | Good | Excellent |
| Chemical / ESCR | Very good | Excellent (ESCR) |
| Typical use | Food/microwave packaging, living hinges | Tanks, dunnage, outdoor, marine |
Choose PP when…
- Hot-fill or microwavable food packaging
- Stiffer parts and living hinges
- Good chemical resistance with heat
Choose HDPE when…
- Outdoor, marine and material-handling parts
- Low-temperature toughness and stress-crack resistance
- Tanks, dunnage and chemical containers
The verdict: Choose PP for heat (microwave/hot-fill) and stiffness; choose HDPE for low-temperature toughness, stress-crack resistance and outdoor/chemical duty.
Frequently asked
Which handles heat better?
PP — it suits microwave and hot-fill; HDPE has a lower service temperature but better low-temperature toughness.
Not sure which fits?
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