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Melt Mass-Flow and Melt Volume-Flow Rate - ASTM D1238
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 Operation |
B | Automatically Timed Flow Rate Measurement |
C | Automatically Timed Flow Rate Measurement for High Flow Rate Polyolefins Using Half-Height, Half Diameter Die |
The testing conditions are most commonly reported as temperature/load (i.e. 190°C/2.16 kg). In the past several test conditions were given alphabetical designations, these designations are described below.
Condition | Temperature (°C) | Load (kg) |
---|---|---|
A | 125 | 0.325 |
B | 125 | 2.16 |
C | 150 | 2.16 |
D | 190 | 0.325 |
E | 190 | 2.16 |
F | 190 | 21.6 |
G | 200 | 5 |
H | 230 | 1.2 |
I | 230 | 3.8 |
J | 265 | 12.5 |
K | 275 | 0.325 |
L | 230 | 2.16 |
M | 190 | 1.05 |
N | 190 | 10 |
O | 300 | 1.2 |
P | 190 | 5 |
Q | 235 | 1 |
R | 235 | 2.16 |
S | 235 | 5 |
T | 250 | 2.16 |
U | 310 | 12.5 |
V | 210 | 2.16 |
W | 285 | 2.16 |
X | 315 | 5 |
The term Melt Index is commonly used in place of the Melt Flow Rate for polyethylene at 190°C/2.16 kg.
Material | Condition |
---|---|
Acetals (copolymer and homopolymer) | 190/2.16 190/1.05 |
Acrylics | 230/1.2 230/3.8 |
Acrylonitrile-butadiene-styrene | 200/5.0 230/3.8 220/10 |
Acrylonitrile/butadiene/styrene/polycarbonate | 230/3.8 250/1.2 265/3.8 265/5.0 |
Cellulose esters | 190/0.325 190/2.16 190/21.60 210/2.16 |
Ethylene-chlorotrifluoroethylene copolymer | 271.5/2.16 |
Ethylene-tetrafluoroethylene copolymer | 297/5.0 |
Nylon | 275/0.325 235/1.0 235/2.16 235/5.0 275/5.0 |
Perfluoro(ethylene-propylene) copolymer | 372/2.16 |
Perfluoroalkoxyalkane | 372/5.0 |
Polycaprolactone | 125/2.16 80/2.16 |
Polychlorotrifluorethylene | 265/12.5 |
Polyethylene | 125/0.325 125/2.16 250/1.2 190/0.325 190/2.16 190/21.60 190/10 310/12.5 |
Polycarbonate | 300/1.2 |
Polymonochlorotrifluoroethylene | 265/21.6 265/31.6 |
Polypropylene | 230/2.16 |
Polystyrene | 200/5.0 230/1.2 230/3.8 190/5.0 |
Polyterephthalate | 250/2.16 210/2.16 285/2.16 |
Poly(vinyl acetal) | 150/21.6 |
Poly(vinylidene fluoride) | 230/21.6 230/5.0 |
Poly(phenylene sulfide) | 315/5.0 |
Styrene acrylonitrile | 220/10 230/10 230/3.8 |
Styrenic Thermoplastic Elastomer | 190/2.16 200/5.0 |
Thermoplastic Elastomer-Ether-Ester | 190/2.16 220/2.16 230/2.16 240/2.16 250/2.16 |
Thermoplastic elastomers (TEO) | 230/2.16 |
Vinylidene fluoride copolymers | 230/21.6 230/5.0 |