Melt flow index tester ASTM D1238 ; MFI series Melt Flow Index Tester
They are suitable to measure the melt flow character of PP, PE, PVC, POM, ABS etc., plastic materials resin and granules.

Principle of measurement of melt flow rate tester

Melt Flow Rate measures the rate of extrusion of thermoplastics through an orifice at a prescribed temperature and load. It provides a means of measuring flow of a melted material which can be used to differentiate grades as with polyethylene, or determine the extent of degradation of the plastic as a result of molding. Degraded materials would generally flow more as a result of reduced molecular weight, and could exhibit reduced physical properties. Typically, flow rates for a part and the resin it is molded from are determined, and then a percentage difference is calculated. Alternatively, comparisons between "good" parts and "bad" parts may be of value. 

Feature of UnitedTest MFI403 Melt flow index tester:

• Large LCD display;

• both MFR/MVR test method

• motorized cutting

• with micro-printer.

The die and half-size die

Test Procedure:
Approximately 7 grams of the material is loaded into the barrel of the melt flow apparatus, which has been heated to a temperature specified for the material. A weight specified for the material is applied to a plunger and the molten material is forced through the die. A timed extrudate is collected and weighed. Melt flow rate values are calculated in g/10 min. 

Specimen size:
At least 14 grams of material;

Test Data:
Flow rate = ( 600/t x weight of extrudate ) 
t = time of extrudate in seconds
melt flow rate = g/10 min.

Other name:
Melt flow index testing equipment; melting flow indexer; melt indexer iso 1133; digital melt flow rate tester; quality melt flow index testing machine; melt flow index astm; plastic Melting Flow Index tester

Conform with stardard: 

ISO 1133  "Plastics - Determination of the Melt Mass-Flow Rate (MFR) and Melt Volume-Flow Rate (MVR) of Thermoplastics”

ASTM D1238  "Standard Test Method for Melt Flow Rates of Thermoplastics by Extrusion Plastometer“

ISO 1133; ASTM D1238; JIS K7210; DIN 53735;  ASTM D3364; BS 2782 Part 7: Method 720A (BS2782-7)

Main specifications: 

^{ISO 1133  "Plastics - Determination of the Melt Mass-Flow Rate (MFR) and Melt Volume-Flow Rate (MVR) of Thermoplastics”
ASTM D1238  "Standard Test Method for Melt Flow Rates of Thermoplastics by Extrusion Plastometer“
ASTM D3364 (for PVC), BS 2782, DIN 53735, JIS K7210}