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Number of adhering microplastic particles sized between 1 and 300 µm on 1 cm2 of the inner tube surface.
| Tubing Material | PA Fragments | PE Fragments | PMMA Microbeads |
|---|---|---|---|
| PTFE | <20 | <20 | 0 |
| PVC 1 | >1000 | >1000 | >1000 |
| TPO 1 | 50 | >1000 | >1000 |
1 particle counting was stopped after a total of 1000 particles was reached.
