Instead, she typed a new specification:
Achieving a TG5 rating depends on several interconnected variables defined by the standard: Iso 20457 Tg5
TG5 classifies output quality, but it cannot control input variability. A recycler processing municipal solid waste (MSW) will always produce lower-grade material than one processing pre-consumer industrial scrap. TG5 does not penalise or differentiate based on source—only on final properties. This means two very different environmental profiles could receive the same TG5 grade. Instead, she typed a new specification: Achieving a
Standard precision . Used for technical parts where fit and function are critical but extreme micro-precision is not required. TG6: Coarse precision, typical for packaging materials. This means two very different environmental profiles could
: Ideally suited for housing parts , enclosures, and general technical moldings.
Talc is a common filler in automotive plastics (dashboards, interior trim). When recycled, talc particles can agglomerate or become too fine. provides the protocol for measuring the "mean particle size of mineral fillers" after recycling. If you are a buyer of recycled PP talc-filled 20%, you require a COA (Certificate of Analysis) that follows TG5. Without it, you risk nozzle blockages or surface defects (streaks).
: Selecting TG5 implies a commitment to higher manufacturing costs compared to standard grades like TG6 or TG7. Tighter tolerances require more expensive tooling, tighter process controls, and more frequent quality assurance checks. Material Influence