Down / Ptfe Membrane Composite Thermal Materials Research And Development

Based on the summarization and analysis of the current theory and the characters of thermal insulation materials under the cold-weather , composite design method of the natural down which is a kind of high thermal insulation material and the PTFE (which is a kind of high water vapor transmission film )film lamination fabrics is applied and studied . At the same time , the structure and the condensation mechanism of the natural down fiber are analyzed ,the cold wind environment test on the warmth instrument which is designed as a warmth man was simulated and the thermal properties were measured on it successfully .By analyzing and discussing of those test data, the influence factors of the component fibers and the proportions of the natural down fiber in the felt under the wind cold environment were discovered , the influence trend to the warmth property of the different wind speed were tested and compared each other when the PTFE film lamination fabrics was applied or not. Through the studies and analysis , the new train of thought for the development and design of the new thermal insulation materials is provided , and furthermore , the basis of the further development to the natural down fiber and the composite multilayered thermal materials were settled.