PE-HD
High Density Polyethylene — the highest-volume plastic globally (>30M tons/year). Linear chains with minimal branching give higher density and strength vs LDPE. Excellent chemical resistance, FDA/food-safe, very low moisture absorption, and good impact resistance down to -30°C. Used for pipes, bottles, containers, fuel tanks, cutting boards, playground equipment, and geomembranes.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| ISO | INT | PE-HD (PE 300) | — | REF | |
| 🇺🇸 | ASTM | USA | ASTM D3350 / HDPE | — | 100% |
Sources: ISO 1872, ASTM D3350
Chemical composition comparison (wt%)
Side-by-side: PE-HD (COMPOSITION) (ISO 1872) vs ASTM D3350 / HDPE (ASTM)
| Element | PE-HD (COMPOSITION) | ASTM D3350 / HDPE (ASTM) | Overlap |
|---|---|---|---|
| Base Polymer (Polyethylene) | 99.5–99.9% | — | — |
Mechanical properties
Injection Molded
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 25–38 | MPa |
| Yield Strength | 22–30 | MPa |
| Elongation | 100–1000 | % |
| Elastic Modulus | 0.8–1.4 | GPa |
| Density | 0.94–0.97 | g/cm3 |
| Melting Point | 125–135 | °C |
| Glass Transition Temp (Tg) | -95–-90 | °C |
| Water Absorption (24h) | 0–0.01 | % |
Compatibility verdict
PE-HD and ASTM D3350 / HDPE: 100% composition match
Close equivalents but NOT identical.
Related materials
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Epoxy/Carbon Fiber (CFRP)
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FKM (Fluoroelastomer / Viton)
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