Vicat softening temperature is determined and the heat deflection temperature under load on plastics and thermoplastics, available with 3 or 6 testing stations.
Test specimens are charged with a constant load and immersed in a bath, where the temperature is increased at a standard velocity. The attained heat resistance rate of plastic material is a widely required parameter for product characterization, for quality control and for evaluating the conformity to the previewed applications.
The unit consists of a temperature controlled oil bath with three testing stations, each of which may be configured for either HDT or VICAT test methods. The inner bath is constructed in stainless steel and the designed volume ensures a good thermal exchange. The rod and frame members have the same linear thermal expansion coefficient.
With the optional software system it is possible to produce graphs showing the deformation of each specimen and temperature increase versus time.
Vicat Softening Temperature Test Method:
Determination of the temperature at which a standard indenter under a force, penetrates 1mm into the surface of a plastic test specimen.
HDT Test Method
A standard test specimen is subjected to a bending stress to produce a nominal surface stress. The temperature is raised at a uniform rate, and the temperature at which a specified deflection occurs is measured.
The system is robust and suited for use in industrial environments as well as laboratory layouts. The HDT Vicat tester complies with the standards ASTM D 1525, ASTM D 648, ISO 306 and ISO 75.
Model 311 offers the auto weight loading mechanism, which automatically lowers and raises weights. Test specimens are lowered and raised automatically into/from the oil bath.
Model 111 has manual weight load and test specimens are lowered manually
For more information and technical specifications about the HDT Vicat testing machine please see the brochure.
Associated equipment
Approx. 20° to 300°C
Model 110: 3 stations
Model 300: 3 or 6 stations.
Model 110: Manual.
Model 300: Fully automatic.
Model 110: Manual.
Model 300: Fully automatic.
User selectable via software; 50°C/hour or 120°C/hour.
Model 110: 1 for all models
Model 300: 3 points for 3 stations / 6 points for 6 stations
1 g up to 1000 g.
230 V 50/60 Hz
Cold water source
Methyl silicon oil (not supplied as standard). 20 liters for Model 110 and 30 liters for model 300.
Model 110: (length x width x height) 760mm×500mm×710mm. Net weight: 80kg.
Model 300: (length x width x height) 890mm×500mm×710mm. Net weight: 110 kg.
There are numerous international standards referring to testing. We supply testing equipment to fulfill any national and international testing standard within our field of business. In case you do not find the standard you are looking for in the below list, please contact us for further information
Standard test method for Vicat softening temperature of plastics.
Standard test method for deflection temperature of plastics under flexural load in the edgewise position.
Plastics - Thermoplastic materials - Determination of Vicat softening temperature (VST).
Plastics - Determination of temperature of deflection under load.
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