Explanation

It refers to the temperature at which the sample is pressed into 1mm by a 1mm 2 needle under a certain load and constant heating rate when the thermoplastic plastics is placed in the liquid heat transfer medium. The heating rate is usually 50t7h and 120 ° C7h, and the load is usually 9.8N and 49N. The test instrument is mainly composed of constant rate heating device, sample stem, oil bath, load, etc. The liquid medium is required to have no impact on the sample, good heat conduction, and appropriate viscosity. silicone oil, liquid paraffin, glycerin, etc. are usually used. The thickness of the sample is generally 3? 6mm, with a minimum length and width of 10mm. It is mainly used to control product quality, and also as a parameter to evaluate the heat resistance of materials.

Classification