GB/T 3682-2000
Determination of the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR) of thermoplastics (English Version)
- Standard No.
- GB/T 3682-2000
- Language
- Chinese, Available in English version
- Release Date
- 2000
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Status
- 2018-10
- Replace By
- GB/T 3682.1-2018
- Latest
- GB/T 3682.1-2018
- Scope
- This standard specifies the method for determining the melt flow rate and melt volume flow rate of thermoplastics under specified temperature and load conditions. Generally, the test conditions for determining the melt flow rate are specified by the material standards cited in this standard. General test conditions for thermoplastics are listed in Appendix A and Appendix B. Melt volume flow rate is useful when comparing filled and unfilled thermoplastics. If the melt density at the test temperature is known, the melt flow rate can be determined with an automatic measuring device. This method is not applicable to thermoplastics whose rheological behavior is affected by hydrolysis, polycondensation or crosslinking. 1.2 The melt mass flow rate and melt volume flow rate of thermoplastics are related to the shear rate. The shear rate in this test is much smaller than the actual processing shear rate. Therefore, the data obtained by this method for various thermoplastics are not necessarily related to their performance in actual use. Both methods are useful in quality control.
GB/T 3682-2000 history
- 2018 GB/T 3682.1-2018 Plastics—Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastics—Part 1:Standard method
- 2000 GB/T 3682-2000 Determination of the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR) of thermoplastics
