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For TG5 to remain valid, parts must be measured under standard conditions (typically 23°C and specific humidity) to account for thermal expansion and secondary crystallization. Why Designers Choose TG5 Iso 20457 Tg5
ISO 20457 is a guideline, not a mandate. Many small-to-medium recyclers cannot afford the laboratory equipment (e.g., melt flow indexers, gas chromatography for odour) required for full TG5 compliance. Consequently, much of the global recycling trade still operates on informal specifications. Related search suggestions are being prepared
TG5 sits at the terminus of this value chain. While TG1-4 address processes , TG5 addresses outcomes . Its mandate is to provide a harmonised system for describing the quality of recycled plastics (r-plastics) based on measurable properties. Without TG5, a recycler in Germany could produce “recycled HDPE,” and a moulder in Vietnam would have no standardised way to know if that material meets his viscosity, odour, or colour requirements. While TG1-4 address processes , TG5 addresses outcomes
Note: ISO standards are subject to revision and updates. While this guide refers to the stable assignments of TG5, specific document numbers and titles may evolve. Always check the ISO Online Browsing Platform (OBP) for the latest status of standards.
TG5 is often the "sweet spot" for technical plastic parts that require a reliable fit without the extreme costs of ultra-high precision molding. Common Use Cases
ISO 20457 TG5 is a critical standard for medical device manufacturers, as it provides a framework for evaluating the biocompatibility of devices that come into contact with the skin. By adhering to this standard, manufacturers can ensure that their devices are safe, reliable, and compliant with regulatory requirements.