Properties and new product developement of automobile air filter filtration material

This paper is mainly regarding to the structure and performance change of automobile air filter and its two different stage of filtration material before filtration and after filtration.With the purpose of experiment is to research the influence of impurity particles on filtration property.Firstly a group of same automobile air filters are collected from market and the filtration material is taken off,then SEM,FT-IR,DTA and TG are adopted to analyze the internal structure,respectively.Meanwhile,other instruments were applied to characterize the performance change of this two different filtration materials,for instance,the weight,thickness,air permeability,breaking strength and elongation,average pore diameter,maximum pore diameter,filtration accuracy and the changes of flow and pressure drop.The results shown that there is an obvious difference between structure and performance of the new filtration material and used material.The deposition of impurity particles on internal pore space surface pore space of filtration material has an important influence on internal structure,physical property and filtration property.And the main purpose is to develop the new filtration materials and to make a deep comparison of filtration properties among them.