Volatile substances in automotive interior materials condense into fog on the windshield after being volatilized by heat. This kind of condensation phenomenon of volatile substances in the glass of automotive interior parts is called fogging, also known as knotting. Fog characteristics, the condensate, also known as condensing components. Fogging of automotive interior materials can impede the view through the windshield, and fogging in adverse light conditions can affect the safety of driving. At the same time, because the condensation components are mostly harmful organic volatiles, the level of fogging can also reflect the level of organic volatiles in interior materials. Therefore, automobile manufacturers in developed countries have set limits on the fogging of automotive interior materials.
Principle of atomization test: The sample is placed in a glass beaker under the specified conditions and heated. Any volatile substance is condensed on the cooled glass plate or the cooled aluminum foil. The atomization performance of the sample is expressed by calculating the atomization value or the atomization amount.
Different atomization test standards for different interior materials, and the requirements of the atomization test parameters are also different, the following lists several commonly used atomization standard specific parameters:
The reflection method and the gloss method in the above standard are the same method. From the time axis, it can be seen that in the early standard, DIDP was used as the reference reagent in the reflectance method (gloss method), and DOP was used as the reference reagent in the gravimetric method. The earlier version of DIN 75201:1992-09 was also specified as the weight of DOP. The reference reagent for the method. In the recent standard, the reference reagents for the two methods were unified and DIDP was used. The requirements of the standard for test conditions are not much different, and in addition to QB/T2728, the other three standards require the same for the measurement parameters.
There are many domestic and foreign standards for atomization, including that different companies have also established their own corporate standards according to their own quality system requirements. For more standards, please pay attention to the later period.
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