Including thermal weight loss, thermal shock, high temp […]
Including thermal weight loss, thermal shock, high temperature pressure, low temperature bending, low temperature stretching, low temperature impact, flame retardant properties and so on. These are the properties of plastic materials for insulation and sheathing. For example, the thermal weight loss test is to detect the degree of degradation and volatilization of materials after high temperature aging at 80℃ for 7 days; the thermal shock test is performed at 150℃ for 1 h after special temperature.
Whether the insulation surface of the winding is cracked; the high temperature pressure detects the degree of elasticity of the insulation material after being cooled by high temperature; all the low temperature tests generally refer to the change of mechanical properties at -15 ° C, and the cable materials are detected. Whether it is brittle, easy to crack or easy to break under low temperature environment.
In addition, the flame-retardant performance of wire and cable is very important. The test to test this performance is the non-flame-burning test, that is, the finished wire and cable installed according to the standard is ignited with a special flame for a certain period of time, and the inspection line after the flame is self-extinguishing. When the cable is burnt, of course, the less the portion burned, the better, indicating that the combustibility is poor, the flame retardancy is good, and the safer.