GB/T 3682-2000: Determination of the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR) of thermoplastics

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Scope

1.1 This Standard specifies a method for the determination of the melt mass-flow rate
(MFR) and the melt volume-flow rate (MVR) of thermoplastic materials under specified
conditions of temperature and load. Normally, the test conditions for measurement of melt
flow rate are specified in the material standard with a reference to this Standard. The test
conditions normally used for thermoplastics are listed in annexes A and B. The melt
volume-flow rate will normally be found useful when comparing filled and unfilled
thermoplastics. The melt flow rate can now be determined by automatic measurement
provided the melt density at the test temperature is known.
This method is not applicable to thermoplastics for which the rheological behaviour is
affected by phenomena such as hydrolysis, condensation or crosslinking.
1.2 The melt mass-flow rate and melt volume-flow rate of thermoplastics are dependent
on the rate of shear. The rates of shear in this test are much smaller than those used
under normal conditions of fabrication, and therefore data obtained by this method for
various thermoplastics may not always correlate with their behaviour in actual use. Both
methods are useful in quality control.

Basic Data

Standard ID	GB/T 3682-2000 (GB/T3682-2000)
Description (Translated English)	Determination of the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR) of thermoplastics
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	G31
Classification of International Standard	83.080.20
Word Count Estimation	12,143
Date of Issue	2000-10-27
Date of Implementation	2001-05-01
Older Standard (superseded by this standard)	GB/T 3682-1983
Quoted Standard	GB/T 1031-1995
Adopted Standard	ISO 1133-1997; IDT
Issuing agency(ies)	State Quality and Technical Supervision
Summary	This standard specifies: The provisions Determination of thermoplastic melt flow rate (MFR) and melt volume flow rate (MVR) temperature and load conditions methods. Generally, determination of melt flow rate referenced by the standard test conditions material standards. Thermoplastics General test conditions are listed in Appendix A and Appendix B. In comparing filled and unfilled thermoplastics time, melt volume flow rate is useful -. If you know the test temperature melt density, you can use the automatic measuring device for measuring the melt flow rate. This method does not apply to the rheological behavior by hydrolysis and polycondensation or crosslinking influence thermoplastics.