Plastics – Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastics
Purpose: 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. Procedure A is a mass-measurement method. Procedure B is a displacement- measurement method. Normally, the test conditions for measurement of melt flow rate are specified in the material standard with a reference to this document.
Standards:
ASTM D1238, ISO 1133-1 & 2
Measured Properties
- Measurement of Melt Flow Rate (MFR) in grams per 10 minutes
Plastics & Rubber, vulcanized or thermoplastic – Methods for determining the density of non-cellular and cellular plastics & Rubber, vulcanized or thermoplastic
Purpose: Density measurement of for quality control, ensuring material uniformity, and monitoring structural or compositional variations
Standards for non-cellular plastics
ASTM D792, ISO 1183
Standards for cellular plastics
ASTM D1622, ISO 845, ASTM D3575
Standards for Rubber, vulcanized or thermoplastic
ISO 2781, ASTM D297
Measured Properties
- Determination of the material density in grams per cubic centimeter (g/cm³) or kilograms per cubic meter (kg/m³)
