Melt Flow Index (MFI), also known as Melt Flow Rate (MFR) and Melt Index (MI), 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 ten minutes through a capillary at a prescribed temperature by a pressure applied.
Melt flow rate is an indirect measure of molecular weight, with high melt flow rate corresponding to 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 viscosity of the melt at the conditions of the test.
The test method is described in ISO 1133 and is similar to ASTM D1238.
Please include information on the physical state (e.g. powder, pellets,...) and chemical nature (e.g. PP, PE, PET, PA,..) of your polymer with your order.

Heat deflection temperature (HDT) is the temperature at which a polymer starts to “soften” under a load, more specifically when the specimen reaches a set deformation in a bending configuration. It refers to a polymer's ability to remain rigid or “stiff” under a constant load and elevated temperatures.
The test method is described in ISO 75 and is similar to ASTM D648.
The dimensions of the provided samples should be according to the specimen dimensions specified in the standard.
Test specimen can also be prepared at an extra cost, contact us for more information.
Please include information on the chemical nature (e.g. PP, PE, PET, PA,..) of your polymer with your order.
Multiple samples? contact us for bulk pricing!

Vicat Softening Temperature (VST) is the temperature at which a polymer starts to “soften” under a load, more specifically when a needle reaches a set indentation/penetration depth. It refers to a polymer's ability to remain rigid or “stiff” under a constant load and elevated temperatures.
The test method is described in ISO 306 and is similar to ASTM D1525.
The dimensions of the provided samples should be according to the specimen dimensions specified in the standard.
Test specimen can also be prepared at an extra cost, contact us for more information.
Please include information on the chemical nature (e.g. PP, PE, PET, PA,..) of your polymer with your order.
Multiple samples? contact us for bulk pricing!