Shall correspond to control sample, approved in accordance with the established procedure. Pores, which can be seen by eyes, are not allowed. Plastic shall no burn at stop of worm extruder for a period of 20 minutes. For application of protective sheaths for wires and cables operating in a range of temperatures from -40°C to 70°C under conditions of high fire hazard and corresponding to the requirements of standard MEK 332, part 3 on non-propagation of burning. These products inhibit flame propagation. |