Analysis and Comparison of Test Methods for Gellowen Atomization Tester

Gellowen atomization tester for automotive, aircraft and other interior materials, such as automotive interior plastic parts, polyurethane, textiles, leather, adhesives, nonwovens, thermoplastic elastomers and other materials at high temperatures volatile components of the evaporation of the situation Evaluation, can also be used for pre-xenon lamp high temperature atomization phenomenon determination.


Equipment technical features:
Wide range of high-precision temperature control device easy to achieve non-standard test, 6 test design, which can be tested at the same time and blank test, equipment, stable operation, to provide users with accurate and reliable test data.

Equipment principle and method:
The sample is heated in the fog cup and begins to evaporate, and the volatilized gas is condensed on a glass or aluminum foil that has been cooled by the cooling chamber. After the completion of the condensation process, the glass plate or aluminum foil was removed and the atomization and volatilization characteristics of the sample were obtained by measuring the atomization value or weight of the condensing component of the glass plate or aluminum foil and comparing it with the data before being condensed.

Gloss method:
The sample is heated in the fog cup by the vaporized gas condensed on the low temperature glass plate. The gloss value of the sample can be obtained by comparing and calculating the gloss value before and after the condensation of the glass plate. (Standard)

Haze method:
The sample was condensed in the fog cup by the vaporized gas condensed on the low temperature glass plate, and the haze value of the sample was obtained by comparing and calculating the haze value before and after the condensation of the glass plate. (Optional)

Weight method:
The sample is heated in the fog cup by the vaporized gas condensed on the low temperature aluminum foil, and the weight of the sample atomization-coagulation can be obtained by weighing the weight of the aluminum foil before and after condensation. (Standard, balance purchase)



Through the test process we see that the three methods are similar, the sample pretreatment, oil bath heating and cooling the same temperature, the test device is similar, the difference is: the measurement is not the same, the weight method by aluminum foil before and after the weight difference G = G1 - G0, the gloss method is measured by the gloss meter before and after the test of the glass plate reflectivity ratio R = R1 / R0 * 100, the haze method is to use the light transmission test before and after the test glass parallel to the light through The rate ratio is F = T1 / T0 * 100, that is, by carrying the different characteristics of the carrier to reflect the degree of atomization.


Comparison of test methods
The impact of the test process environment on the results
1) Effects of temperature and humidity on the results
First, the temperature and humidity during the condensation process, this link is relatively good control, that is, under the stability of the instrument through the calibration material to measure the accuracy of the results. The second is condensed into the fog after the impact of environmental temperature and humidity, after condensation of the carrier - aluminum foil and glass plate on the environment is extremely high, the environment will have a great impact on its small changes, due to the fog carrier will inevitably Condensation of some water, the ambient temperature and humidity on the evaporation of water is essential, so the standard requirements of the carrier after the fog placed in the temperature of 23 ℃ ± 2 ℃, relative humidity of 50% ± 5% of the environment to adjust.


2) The effect of cleanliness of glassware on the results
Glassware is not clean or not dried, will give the next test pollution, a direct impact on the accuracy of the results.
The following are the same as the "
Test results are verified
In order to determine whether the final test results are accurate or not, the DIN 75201, ISO 6452, QB / T 2728 standards are given the same, because the operation of the atomization test is more complicated and the operation process is cumbersome and susceptible to the environment. Of the calibration method.
Gravimetric method: 10 g ± 0.1 g of dioctyl phthalate (DOP) was poured into the fog cup. Under the test conditions of 100 ℃ and 21 ℃, the test results should be in the range of 4.9g ± 0.25 G, otherwise, as the test is unsuccessful, should identify the cause of the error, redo the test.
Gloss method: In the fog cup into the 10g ± 0.1g phthalic acid diisocene ester (DIDP), high and low temperature bath were 100 ℃, 21 ℃ under the test conditions, the test results should be 77% ± 3% range, otherwise considered to be unsuccessful test, should find out the cause of the error, redo the test.
Haze method: the current standard has not yet seen the calibration method.



From the comparison of the above test methods can be seen, the gloss method and the haze method is relatively close, are the detection of glass plate optical properties, the use of these two test methods, its purpose is to pay more attention to the car interior material volatile In the windshield on the line of sight caused by the impact of traffic safety hazards; the use of gravimetric testing, the purpose is more concerned about the volatile substances in the harmful ingredients on human health and the impact on the surrounding environment. No matter what kind of test method, should ensure the accuracy of the results.

2017-05-05 17:34