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The main testing method of automotive interior atomization test compares. This article mainly introduces the three main test methods of the atomization test of the car interior parts. The test devices, environmental requirements, and verification methods of each method are The introduction and comparison.
1. Overview
By percentizing the interior decorative materials of the car, the control of volatile substances in these materials can be effectively reduced to effectively reduce the inside of the car in the car Environmental pollution has become an important means to control the quality of products in automotive and automotive interior materials.
At present, there are many types of auto interior fog test standards in the international and domestic types. These standards involve three test methods: glossy method, weight method, fogging method, various standards and involved involved The test method is used below
These three test methods are used in different enterprises or testing agencies.
2. Fog device
As shown in the figure, the structure diagram of the foggy device is shown in the figure, the sample is placed at the bottom of the fog glass glass, and the pressure is used. The sample ring is pressed, and the foggy cup is placed in the constant temperature oil bath. The top plane of its mouth is an oil -resistant fluorine rubber seal ring with high temperature resistance and high temperature. Filter paper, cooling board. At high temperature, the volatile substances in the material are accelerated and volatilized, and the fog carrier is condensed on the sealing ring.
Except for the G section G in the figure, the three test methods are the same. For the gloss and fogging method, the G part is a fog glass plate. The test results of these two methods can be obtained by measuring the gloss value or mist value before and after the glass plate. For the weight method, the G part is an aluminum foil. The upper plane of the aluminum foil is a round glass plate with a thickness of 3 mm thick and slightly greater than the aluminum foil. result.
3. Environmental requirements
The fog process of the atomization test is not high on the external environment. But the environment has basically no effect on it. However, the carrier after the fog -aluminum foil and glass plates are extremely harsh on the environment, and the small changes in the environment will have a great impact on it. Almost all standards are required to adjust the glass plate after the foggy temperature of 23 ° C ± 2 ° C, and the humidity is adjusted in an environment with a humidity of 50 % ± 5 % RH, and it is required to have no wind and no sunlight. The fog carrier will inevitably condense some water. The temperature and humidity of the environment are crucial to evaporate the water. In fact, it is difficult to effectively regulate the humidity in general laboratories. Due to the uncertainty of environmental control, it will directly affect the accuracy of the final test results.
DIN 75201, ISO 6452, QB/T 2728The aluminum foil in the measurement method is adjusted in the dryer after the aluminum foil is fog. In this way, as long as the temperature of the environment where the dryer is located, the humidity and gas flow should not be considered. The regulating environment after the aluminum foil becomes fog is relatively easy to control.
Fourth, the test results verification
Due to the many links of atomization experiments, the operation process is cumbersome and easy to be affected by the environment, so in order to judge the last obtained obtained Whether the experimental results are correct or not, the three standards of DIN 75201, ISO 6452, QB/T 2728 all give the same verification method.
The luster method is a 10 ± 0.1 g of phthalate (DIDP) pouring 10 ± 0.1g in the fog cup. The temperature of the temperature bath at the constant temperature bath is 100 ° C and the cooling plate temperature is 21 ° C. Under the conditions, the result of the final test should be within 77 ± 3 %, otherwise it is deemed that the test is unsuccessful. The reason for the mistake should be found and the test should be replaced.
The weight method is to pour 10 ± 0.1 g of the diopenate (DOP) of 10 ± 0.1g in the fog cup, and the temperature of the constant temperature bath is 100 ° C and the cooling plate temperature is 21 ° C. The result of the final test should be within 4.9 ± 0.25mg range, otherwise it is deemed to be unsuccessful. The reason for the mistake should be found and the test should be replaced.
The verification method is given in which standard has not yet been found in the Misty Method
