熔体流动速率仪是用于测定热塑性树脂的熔体质量流动速率（MFR）、熔体体积流动速率（MVR）和熔体密度，它不仅适用于熔融温度较高的聚碳酸酯、尼龙、氟塑料、聚芳砜等工程塑料,也适用于聚乙烯、聚苯乙烯、聚丙烯、ABS树脂、聚甲醛树脂等熔融温度较低的塑料测试,广泛地应用于塑料原料、制品、石油化工等行业以及相关大专院校、科研单位和商检部门。
1.1 This test method covers measurement of the rate of
extrusion of molten resins through a die of a specified length
and diameter under prescribed conditions of temperature, load,
and piston position in the barrel as the timed measurement is
being made.
1.2 Procedure A is a manual cutoff operation based on time
used for materials having flow rates that fall generally between
0.15 and 50 g/10 min. Procedure B is an automatically timed
flow rate measurement used for materials having flows from
0.50 to 900 g/10 min. By both procedures, the piston travel is
generally the same during the timed measurement; the piston
foot is about 46 and 20.6 mm above the die. Comparable flow
rates have been obtained by these procedures in interlaboratory
round-robin measurements of several materials described in
13.1. Provision is made for calculation of melt volume-flow
rate as well as melt mass-flow rate.
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