Preparation and Thermo physical Properties of High-low Temperature resistance flexible materials

摘要

A new flexible multilayer thermal insulation material has been prepared for high (160°C) and low (-120°C) temperature resistance applications, which is less than 420 g/m2, whose thickness with light stress is less than 3 mm and in natural condition is about 10 mm. This material consists of outer fabric, inner fabric and middle multilayer insulations. Then the middle multilayer insulations consist of a large number of highly reflecting shields, which were separated from each other by thin no conducting spacers. The thermal conductivities of the middle multilayer insulation at different layers with the differences in temperature were 5°C, 17.5°C, 30°C were obtained through measurements using KES-F7 thermal labo II apparatus. And the thermal conductivity of middle multilayer insulation can be influenced by the contact surface state of reflecting shields, so both smooth and crinkled multilayer shields were measured. At last, the insulating properties from -120°C and 160°C to room temperature of the multilayer thermal insulation material were measured. Through the experiments, the material with 13 reflecting shields which is discussed in this paper can satisfy the basic requirements in application between 160°C and120°C.