Moomization is the condensation of the volatile substances discharged by the car interior and material on the glass. The atomization test is to perform atomization tests of the internal decorative materials of the car to achieve the control of the volatile substances in these materials. Effectively reducing environmental pollution in the car has become an important means for automotive and automotive interior materials production enterprises to control the quality of products.
1. Why do you do atomization testing?
Internal decorative materials such as leather, plastics, textiles, and adhesives, etc., all contain some volatile substances, especially under the sun, the temperature in the car rises, which will exacerbate this kind of Volatility.
These volatile gases are condensed on car windows or windshields, causing poor sight, which will affect the driver's sight and driving safety; some volatile substances will affect the health of the driver. Therefore, in order to reasonably control the production of volatile substances, it is necessary to perform atomization tests for materials used for car interior. Materials that exceed the standard indicators that are miraculously exceed the standard indicators will not be used for car interior.
2. The origin of atomization test
In the 1970s, some large auto manufacturers in Europe have begun to study the fog characteristics of the auto interior parts. In the early 1980s, Germany The Automobile Standard Drafting Commission and Synthetic Materials Standard Drafting Committee jointly form a fog working group to systematically study the reappearance of foggy testing methods and methods. WindscreenFogging Characteristics of Trim Materials in Motor Vehicles. Subsequently, the American Motor Vehicle Engineer Association and the International Standardization Organization made some modifications on the basis of DIN75201 and issued relevant standards ISO 6452 and SAE J1756. Based on the above -mentioned standards in the world's major automobile manufacturing companies, they have promulgated the corporate standards of fogging, and have put forward relevant requirements for the fog characteristics of automobile interior parts.
3. The fog test process and precautions of the car interior material
Obuilding the interior decorative materials of the car to achieve the volatile of these materials can be volatile The control of sexual substances to effectively reduce environmental pollution in the car, which has become an important means to control the quality of the product of automobiles and car interior materials. At present, there are many types of auto interior fogment test standards in the country and domestic types. These standards involve three test methods: luster method, weight method, and mist.
1. Test principle
The volatile substances in the car interior material can be volatile into the air after heating. Concrete into a liquid attached to the cooling object. FogThe process is the process of volatilization-condensate. Put the sample in the fog cup, cover the foggy cup with a sealing ring and a ritual ring (or a weighing aluminum foil), and install the cooler on it. The foggy cup is placed in the thermostat. The sample was heated in the foggy cup, and the volatile items in it began to volatilize, and the evaporation gases condensed on the ripples that have been cooled and cooling.
Gloss method: After the condensation process is over, remove the Lili board and place the prescribed time in the state specified in the standard. Compared with the initial gloss value of the cymbal board before the test, so as to get the fog value of the tested materials;
Misty method: The parallel light through the parallel light, compared with the parallel light of the parallel light before the test, obtains the fuzzyness of the tested materials.
Weight method: The sample is heated in the foggy cup, and the evaporating gas is condensed on the aluminum foil that has been cooled and cooled. After the condensation process is over, remove the aluminum foil and use the electronic balance to measure its quality. After subtracting the quality of the aluminum foil itself, the quality of the atomization condensate of the test material — condense group points.
It is worth noting that these three test methods are the same as the fog cup, except for the G parts above:a. Gloss In order to make a fog glass plate, measure the gloss before and after the glass plate becomes fog
B. Misty method: The G part is a fog glass plate, measuring the fog value before and after the glass plate becomes the fog
c. Weight method: G parts are aluminum foil, measuring the weight before and after aluminum foil condensation
In addition, in the luster method, not all materials are measured at 60 ° measurement under 60 ° conditions. According to different standards, most standards are tested according to 60 °. However, there are different angles of DIN 67530 standard:
a. Highlight of the sample: 20 °; b. Light in the sample: 60 °;
2. Test the specific process
What are the advantages and disadvantages of these three test steps and test methods? Let's take a look at the specific test process:
A: Provide material particles -B: Make standard model (D 80mm/10g) - C: Put in the fog cup —D:
Pressing the sample with a pressure ring -E: Put in a constant temperature oil bath (100 ° C/3h), measure the corresponding parameters -F: The testing agency issued an experimental report Essence
3. What are the criteria and focus of the three test methods?
GlossA degree method: ≥77 ± 3%, the effect of volatilization in the internal decorative materials of the car on the sight of the windshield.
Misty method: No calibration method is given, and the effects of volatile objects in the internal decorative materials of the car on windshield vision.
Weight method: ≤4.9 ± 0.25mg/10g, more concerned about the impact of harmful ingredients in volatile objects on human health.
4. Methods and standards for atomization testing of different brands of car companies
Different car companies' standards for atomization test The weight method and misty method are adopted; Toyota adopts gloss and weight method; moral standards, beauty standards, national standards, China, etc. all adopt gloss and weight methods. Below, let's take a closer look at the corresponding standards and test methods of different car companies.
Table 1 Various standards and the test methods involved are shown below
Measurement methodVolkswagen PV3015
Measurement of the Concrete
Non -metal interior material foggy degree Value Determination
Measurement of the Concrete Composition
The glossy method, weight method
Germany DIN 75201
Determination of the Materials used in the internal equipment of the car
The luster method, weight method
American SAE J1756
Determine the test method of the fog characteristics of the car interior part
The luster method, the weight method
International ISO 6452
Measurement of the Fog characteristics
The luster method, weight method
China QB/T 2728
Measurement of leather physics and mechanical test atomization performance
The glossy method, weight method
Nissan NES M0161
Test Method of the Materials of the Materials
Mitsubishi ES -X83231
The Misty of Interior Materials
Misty method, weight method