BioFlex® is a polypropylene random copolymer (PP-R), not TPU; online sources misidentify it routinely, but the chemistry difference affects sterilisation compatibility, migration risk, and tissue response in fresh piercings.
What the full article covers
BioFlex® and Bioplast are polypropylene random copolymers (PP-R) certified to ISO 10993-6 and FDA Class IV, fundamentally different from thermoplastic polyurethane (TPU) elastomers used by competitors.
Online sources routinely misidentify BioFlex® as TPU; this factual error obscures real differences in biocompatibility, sterilisation compatibility, and migration risk.
PP-R and TPU have divergent migration profiles, sterilisation thresholds, and softening temperatures, using them as equivalent alternatives creates compliance and safety liability.
Silicone medical grades and TPU formulations remain valid choices for specific anatomies, but they require separate material qualification and practitioner awareness of the chemical distinction.
Studio procurement decisions must reference actual chemistry, not brand convenience or marketing grouping, BioFlex® PP-R, Bioplast PP-R, Kaos Softwear TPU, and silicone medical grades are not interchangeable.
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First published on poliinternational.com. This is a summary of the original engineering article.
