Relations between thermal conductivity and the warm property of wool fabrics

The relations between the thermal conductivity and the warm property of wool fabrics was studied by testing the warm efficiency of variously treated wool fabrics,measuring the thickness of wool fabrics and the SEM analysis of wool morphological structures.The results indicated that,the wool showed natural excellent warm property,and it changed due to different treatments.Bulking treatment increased the still air contained in the wool fabric,and decreased the thermal conductivity of wool,leading to improvement in the warm efficiency of wool;PU treatment made a polymer film formed on wool surface and filled the pores in/between wool fibers with the polymer deposits,resulting in a decrease in air convection and a increase in thermal conductivity of wool,and a net outcome of the decrease in wool warm property.