In essence, the standard describes a simple but powerful machine: an (often called a “melt flow indexer”). The test involves heating a thermoplastic material in a barrel, applying a specific weight to a piston, and forcing the melt through a small die. The result tells you how easily the plastic flows.
Terminology preserved from withdrawn D13 standards to maintain historical context. astm d123 pdf
A typical PP for injection molding might have MFR = 10 g/10 min (230°C, 2.16 kg). A PP for thermoformed cups might be MFR = 1–2 g/10 min. A PP for melt‑blown nonwoven fabric (like face masks) can go up to MFR = 1500 g/10 min – that requires a different procedure (lower temperature or different weight) as described in D1238. In essence, the standard describes a simple but
That’s why rheologists call it a “single‑point measurement.” It’s useful as a go/no‑go check, but not a full viscosity curve. A PP for melt‑blown nonwoven fabric (like face
In essence, the standard describes a simple but powerful machine: an (often called a “melt flow indexer”). The test involves heating a thermoplastic material in a barrel, applying a specific weight to a piston, and forcing the melt through a small die. The result tells you how easily the plastic flows.
Terminology preserved from withdrawn D13 standards to maintain historical context.
A typical PP for injection molding might have MFR = 10 g/10 min (230°C, 2.16 kg). A PP for thermoformed cups might be MFR = 1–2 g/10 min. A PP for melt‑blown nonwoven fabric (like face masks) can go up to MFR = 1500 g/10 min – that requires a different procedure (lower temperature or different weight) as described in D1238.
That’s why rheologists call it a “single‑point measurement.” It’s useful as a go/no‑go check, but not a full viscosity curve.