규격에 명시된 일정한 실린더에 시료 별로 규졍된 하중과 온도로 압출시킨 후 10분간 압출된 수지의 무게 측정하여 용융질량흐름(MFR) 과 용융체적흐름(MVR) 을 확인 가능 

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Product Description
The Melt Flow Index is a measure of the ease of flow of the melt of a thermoplastic polymer. It is defined as the mass of polymer in grams flowing in 10 minutes through a capillary of specific diameter and length by pressure applied via prescribed alternative gravimetric weights for alternative prescribed temperatures as specified in the ASTM D1238 and ISO 1133 Test Standards

The Melt flow rate is an indirect measure of molecular weight, a high melt flow rate corresponding to a low molecular weight. At the same time, melt flow rate is a measure of the ability of the material's melt to flow under pressure. Melt Flow rate is inversely proportional to the viscosity of the melt at the conditions of the test, though it should be borne in mind that the viscosity for any such material depends on the applied force. Ratios between two melt flow rate values for one material at different gravimetric weights are often used as a measure for the broadness of the molecular weight distribution.

Melt flow rate is commonly used for polyolefin