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Melt Mass-Flow (MFR) and Melt Volume-Flow (MVR) Rate - ISO 1133
Extrusion rate of a resin through an orifice of defined dimensions at a specified temperature and load. Flow rates can be used to differentiate grades or provide a measure of degradation of a material as a result of molding.
Procedure | Description |
---|---|
A | Manual Testing |
B | Automated Testing |
The testing conditions are most commonly reported as temperature/load (i.e. 190°C/2.16 kg). Occasionally test conditions are represented by a letter code. These letter codes are described below.
Letter Code | Temperature (°C) | Load (kg) |
---|---|---|
A | 250 | 2.16 |
B | 150 | 2.16 |
D | 190 | 2.16 |
E | 190 | 0.325 |
F | 190 | 10.00 |
G | 190 | 21.60 |
H | 200 | 5.00 |
M | 230 | 2.16 |
N | 230 | 3.80 |
S | 280 | 2.16 |
T | 190 | 5.00 |
U | 220 | 10.00 |
W | 300 | 1.20 |
Z | 125 | 0.325 |
The term Melt Index is commonly used in place of the Melt-Mass Flow Rate for polyethylene at 190°C/2.16 kg.
Material | Condition |
---|---|
PS | 200/5.00 |
PE | 190/2.16 |
190/0.325 | |
190/21.60 | |
190/5.00 | |
PP | 230/2.16 |
ABS | 220/10.00 |
PS-I | 200/5.00 |
E/VAC | 150/2.16 |
190/2.16 | |
125/0.325 | |
SAN | 220/10.00 |
ASA, ACS, AES | 220/10.00 |
PC | 300/1.20 |
PMMA | 230/3.80 |
PB | 190/2.16 |
PB | 190/10.00 |
POM | 190/2.16 |
MABS | 220/10.00 |