本试验方法测量车辆条件下隔热成型隔热板的系统材料性能。虽然单个组件的材料特性通常可以通过现有的测试方法确定，但整个复合材料的系统特性通常更难确定（尤其是对于多层屏蔽）。系统材料特性包括横向或平面内（x）方向的热导率、穿过厚度或垂直方向（y）的热导率、屏蔽顶部和底部的表面发射率以及屏蔽材料的比热。

This test method measures the system material properties of an insulated formed heat shield under invehicle conditions. While the material properties of the individual components can often be determined via existing test methods, the system properties of the entire composite is typically much harder to ascertain (especially for multi-layer shields). System material properties include thermal conductivity in the lateral or in-plane (x) direction, thermal conductivity through the thickness or perpendicular (y), surface emissivity on the top and bottom sides of the shield and specific heat of the shield material.