Vicat
Laboratory > Thermal
| Vicat - Vicat softening temperature according to ISO 306 (VST) | |
The Vicat softening temperature is the temperature at which a flat-tipped needle penetrates the sample to the depth of 1 mm under a specific load. The temperature reflects the softening point when a material is used in a high temperature application. |  |
| Test procedure: | |
A test sample is placed on the test apparatus so that the penetrating needle rests at least 1 mm from the edge. A load of 10 N or 50 N is applied to the sample. The sample is lowered to an oil bath at 23 degrees C. The bath rises at a rate of 50 ° or 120 ° C for hours until the needle penetrates 1 mm. Sample size: The test sample should be between 3 and 6.5 mm thick and at least 10 mm wide and long. You can not stack more than three layers to achieve the minimum thickness. Values : Temperature at which the needle penetrates 1 mm. |