Effects of UV on different plastic sheets
Different types of plastics have different tolerances to UV radiation. Here are the UV resistance ratings of common plastic sheets (1-5 stars, 5 stars means the strongest UV resistance):
| Plastic-type | UV resistance rating | UV impact | UV treatment recommendations |
|---|---|---|---|
| HDPE (high-density polyethylene) | ⭐⭐⭐ | Yellowing, brittle | Carbon black filling, UV absorber |
| UHMWPE (ultra-high molecular weight polyethylene) | ⭐⭐ | Surface powdering reduces the toughness | Add a UV absorber or UV stabilizer |
| PP (polypropylene) | ⭐ | Easy to become brittle and crack | Add UV absorber |
| PC (polycarbonate) | ⭐⭐⭐⭐ | Yellowing, but structurally stable | UV coating or co-extruded UV protective layer |
| PVC (polyvinyl chloride) | ⭐⭐⭐ | Color change, reduced strength | Add UV absorber and antioxidant |
| ABS (acrylonitrile-butadiene-styrene) | ⭐⭐ | Discoloration, powdering | UV stabilizer or UV coating |
| PMMA (acrylic/plexiglass) | ⭐⭐⭐⭐⭐ | Slight yellowing, but strong | UV resistance Intrinsically UV resistant can be used outdoors |
| PTFE (polytetrafluoroethylene) | ⭐⭐⭐⭐⭐ | Almost no effect | Intrinsically UV resistant, no additional treatment required |
Summary: Olefin plastics such as HDPE, UHMWPE and PP have weak UV resistance and require UV treatment. PC, PMMA, and PTFE have strong UV resistance and are suitable for outdoor applications. PVC and ABS require additional UV protection measures.
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