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Introduction
With the rapid development of the automotive industry, cars have been closely related to peoples lives and become important transportation for travel. The quality of automotive products has also attracted more attention, especially for driving safety and harmful substances in the car.
Volatile substances in the car interior material will be condensed into fog on the windshield after heating. This phenomenon is called a fog characteristic, and its condensate is also called condensate group. Leather, plastic, textiles, and adhesives all contain volatile substances. As the temperature in the car rises, it will increase volatile. In order to reasonably control the generation of volatile substances, it is necessary to perform atomization tests on car interior materials.
Purpose of atomization performance test
1. Ensure traffic safety: volatile substances in car interior materials condense on car windows or windshields, which will causePoor vision affects the drivers sight and driving safety.
2. Pay attention to human health: The harmful ingredients volatilized by car interior materials will affect human health, such as aldehydes, alkanes and other substances in the material.
3. Reduce environmental pollution: Reasonable and effective control of the volatilization of organic material organic materials will greatly reduce environmental pollution in the car, which will help reduce pollution to the surrounding environment.
2. Principles of the test method of atomization
Increase the control of volatile substances through atomization tests to effectively reduce environmental pollution in the car. It has already already been. Become an important means for automobile manufacturers to control the quality of products. At present, there are many types of test standards for atomization performance in the world and domestic, involving three main test methods: gloss, weight, and misty.
Determination of the atomization performance of the internal equipment used in DIN 75201 in Germany (luster method, weight method)
Test method for determining the fog characteristics of automotive interior parts (glossy degree Method, weight method)
China QB/T 2728 leather physics and mechanical test atomization performance (gloss method, weight method)
Volkswagen PV3920 interior non -metal material fog value value Measurement (Misty Method)
Mitsubishi ES-X83231 The Misty (Misty Method, Weight Method)
International ISO 6452 rubber or plastic coating of fabric internal decoration Measurement of the atomization characteristics of the material (gloss method, weight method)
1. The principle of weight method test
The sample of the sample is placed in the fog cup, and the sealing ring is used. And the weighing aluminum foil cover the foggy cup and install the cooler on it. The foggy cup is placed in HengThe inside of the temperature is heated, and the evaporating gas is condensed on the cooled aluminum foil. After the condensation process is over, remove the aluminum foil. After adjusting it in the prescribed state, it is called its quality and subtracts the quality of the aluminum foil itself. Treatment rarr; turn on the high, low -temperature bath tank and reach the set temperature of 100 ℃, 21 ℃ rarr; accurately weigh the weight of aluminum foil G0 rarr; The sample is placed in the foggy cup, two parallel samples Aluminum foil, glass plate, filter paper rarr; continuous heating 16h rarr; remove the aluminum foil, balance about 4h in the dryer rarr; weigh the weight of aluminum foil with condensate rarr; get the result G G1-G0
2. Test principle of gloss
Put the sample in the fog cup, cover the fog cup with a sealing ring and glass plate, and install the cooler on it. The foggy cup is heated in the thermostat, and the evaporating gas condenses on the cool glass plate. After the condensation process is over, remove the glass plate, adjust it in the prescribed state, measure the reflection coefficient value of 60 deg; of the glass plate with the gloss instrument, and compare the value of the reflex coefficient before the test. Value, the test process is as follows:
Sample pre -processing rarr; turn on the high, low -temperature bath tank and reach the set temperature of 100 deg; C, 21 deg; C rarr; gloss meter measurement R0 rarr; The sample is parallel in the fog cup, parallel parallel, parallel, parallel, parallel, and parallel. Three -like rarr; Place the foggy cup, fluorine rubber fixed ring, glass plate, filter paper rarr; continuous heating 3h rarr; remove the glass plate and place it in a 23 deg; C and 50%RH environment to balance 1h rarr; measure the atomized coagulation R1 rarr; get it Results R R1/ R0*100
3. The principle of testing the test
The sample disposal method is the same as the gloss method. After the condensation process is over, remove the glass After adjusting it under the specified state, the glass plate parallel light passes after testing the test after the light transmittance instrument, and compared with the parallel light through the test before the test. The process is as follows:
Sample pre -processing rarr; turn on the high, low -temperature bath tank and reach the set temperature of 100 deg; C, 21 deg; C rarr; light transmittance instrument measurement T0 rarr; The sample is placed in the foggy cup, parallel sample three three, three parallel samples three One rarr; Place the foggy cup, fluorine rubber fixed ring, glass plate, filter paper rarr; continuous heating 5h rarr; Remove the glass plate and place it in 23 deg; C and 50%RH environment to balance 1h F t1/ t0*100
3. Comparison and analysis of the test method
Our test process we can see that the three methods are similar, and the previous samples are similar. The treatment, the heating temperature of the oil bath, and the cooling temperature of the tested device are similar. The difference is that the measurement standard is different. The weight method is poor before and after the aluminum foil test. Plate reflectionThe ratio of the coefficient is R R1/ R0*100. The fogging method is the ratio of parallel light through the test test of the light transmittance instrument test test. Features to reflect the degree of atomization.
1. Comparison of three test methods
2. The impact of the environment of the test process on the result
1) Impact
First, the effect of temperature and humidity during condensation, this link is relatively easy to control, that is, to measure the accuracy of the results by calibrating the substance under stable instrument conditions. The second is the effect of condensing the temperature and humidity of the environment after the fog. The concrete carrier-aluminum foil and glass plates have high requirements on the environment. The small changes in the environment will have a great impact on it. Condennce with water, the temperature and humidity of the environment are essential to evaporate water, so the standard in the standard requires the foggy carrier in an environment with a temperature of 23 deg; C plusmn; 2 deg; C and a relative humidity of 50%plusmn; 5%for adjustment.
2) The impact of the cleanliness of the glassware on the result
The glassware is not washed or dry, which will bring pollution to the next test, which directly affects the impact of the next test, which directly affects the impact of the next test, which directly affects the impact. The accuracy of the result.
3. The test results verification
Due to the many links of atomization test, the operation process is cumbersome and easy to be affected by the environment, so in order to judge the last obtained obtained The test results are accurate or not, the three standards of DIN 75201, ISO 6452, QB/T 2728 all give the same verification method.
Weight method: Pour 10g plusmn; 0.1g of phthalate (DOP) in the foggy cup. Under the test results of 100 deg; C and 21 deg; C, the test results It should be within the range of 4.9g plusmn; 0.25g, otherwise it is deemed to be unsuccessful, and the cause of the error should be found and re -test.
Globalism method: Pour 10g plusmn; 0.1g of phthalinate (DIDP) in the foggy cup, and test conditions of 100 deg; C and 21 deg; C, respectively. The result should be within the range of 77%plusmn; 3%, otherwise it is deemed that the test is unsuccessful. The reason for the mistake should be found and the test should be replaced.
Misty method: There is no verification method in the current standard.
Fourth, the end of the conclusion
From the comparison of the above test methods, it can be seen that the gloss and misty method are relatively close, both of which are the optical performance of the glass board. With these two test methods, the purpose is to pay more attention to the volatilization of volatilization in the car interior material condensing the impact of driving safety risks caused by the impact of sight on the windshield; the purpose of using the weight method is to be more concerned about the volatile objects. Harmatic ingredients for human health and human healthImpact on the surrounding environment.No matter what kind of testing method, the accuracy of the results should be ensured.
At present, the domestic test standards for the atomization performance of automotive interior materials are still based on the standards of the vehicle factory. It is recommended to formulate national or industry standards as soon as possible to integrate with international standards in order to facilitate automobile production enterprises to be more more than more.Good control of product quality.
References:
1, DIN 75201 The material atomization performance of the internal equipment of the automobileTesting method of fog characteristics
3, QB/T 2728 leather physics and mechanical test atomization performance
4. Mercement
5. Mitsubishi ES-X83231 The complexity of the interior material
6. ISO 6452 rubber or plastic coating fabrics in the fabulization feature test
