A multilayed thermal-protective fabric is prepared by melt hot pressing of thermoplastic polyure-thane(TPU),basalt fiber(BF)and aramid fiber(PA).And silicone resin(OSR)is introduced to modify TPU.The results show that when the mass of solvent N,N-dimethylacetamide,TPU and OSR is 80 g,20 g and 2 g,re-spectively,the mechanical properties of the OSR/TPU composite film are optimal with a tensile strength of 20.7 MPa and an elongation at break of 40.8%.The air permeability of BF-OSR/TPU-PA composite fabric is reduced to 47.71 mm/s,the thermal insulation effect is greatly improved with the thermal conductivity of 0.118 5 W/(m·K),and the temperature difference(ΔT)is up to 56℃.The composite fabrics are both flame retar-dant and hydrophobic,which is expected to meet the needs of extreme environment applications in aerospace,automotive manufacturing,and other fields in the future.
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