Assessment of the effect of volatile substances in automotive carpets on visibil

The content of volatile substances in automotive carpets has an important impact on air quality and vision in the confined space of the cabin. This paper evaluates the impact of volatile substances in carpet samples on the line of sight by testing the fogging performance of the samples, and introduces the test principle, parameters and application scope of the equipment FT-F1 fogging tester and WGT-S light transmittance fogging tester, and the test process to provide reference for testing the content and impact of volatile substances in automotive carpet and other fabrics.

 

Program details.

 

1、Significance

 

Carpet is as an important car interior parts, with the role of anti-slip, anti-noise, dust absorption, waterproof and so on. The carpet is generally made by gluing the surface fabric and the backing material, and the adhesive used for gluing is the main source of volatile substances in the carpet. The volatile substances such as monomer and residual solvents in the adhesive which are not fully reacted are gradually released into the air in the process of use, and the volatilization of these substances will be accelerated when the temperature in the car is high. These volatile substances either float in the air of the sealed compartment of the car and endanger human health, or condense on the car windows and affect the driving vision. Therefore, it is very necessary to monitor and evaluate the content of volatile substances in car carpet in time.

 

2、Test sample

 

The test sample is a kind of carpet sold in the market.

3、Test basis

 

There are many test methods related to the content of volatile substances in automotive interior parts, such as ISO 6452-2007 "Determination of fog condensation performance of rubber or plastic coated fabric automotive interior trim", PV3920 "Determination of fogging value of non-metallic interior materials", DIN 75201 "Determination of fogging performance of materials used in automotive interior", NES M0161 "Fogging of automotive interior parts" and so on. Test" and so on, comprehensive relevant standards, the evaluation methods of volatile substances can be divided into two categories: one is the evaluation of the amount, that is, by weight method to test the quality of the volatile substances; one is the evaluation of the impact of volatile substances on the driving line of sight by the gloss method or the haze method. This paper uses the haze method for testing.

 

4、Test equipment

 

This paper adopts FT-F1 fogging tester and WGT-S light transmittance haze tester to conduct the test, the former is independently developed and produced by Jinan Labthink Electromechanical Technology Co.

 

4.1 Test principle

 

Simulate the volatile material volatilization process, the specimen will be placed in the fogging cup and heated to volatilize, the glass plate is placed above the fogging cup, the glass plate is equipped with condensation device, the material volatilized by the specimen will be condensed on the glass plate, the glass plate will be removed after the test, and the fogging value of the specimen can be obtained by comparing the fogging value before and after the condensation of the glass plate.

 

4.2 Scope of application

 

(1) FT-F1 fogging tester

 

Applicable to automotive, aircraft and other interior materials, such as automotive interior plastic parts, polyurethane, textiles, leather, adhesives, non-woven fabrics and other materials in the evaluation of the evaporation of volatile substances at high temperatures, can also be used for the determination of high-temperature fogging phenomenon in front of the car xenon lamp; applicable to the plastic raw material particles of high-temperature volatile components test; can be extended to carpets, leather, sponges, rubber and other products in high-temperature conditions Volatility test; can meet a number of national and international standards, such as ISO 6452, DIN 75201, SAE J1756, QB/T 2728, BS EN14288, PV 3920, NES M0161, TSM 0503G, etc.

 

(2) WGT-S Light Transmission Haze Tester

 

It is suitable for all transparent and semi-transparent parallel plane samples (plastic plates, sheets, etc.) to test light transmittance and haze, and liquid samples (water, drinks, etc.) to determine turbidity or clarity.

 

4.3 Equipment parameters

 

(1) FT-F1 atomization tester

 

The temperature control range of the high temperature tank is room temperature ~ 150℃, the accuracy of temperature control is ±0.1℃; the temperature control range of the low temperature tank is 0~100℃, the accuracy of temperature control is ±0.1℃; 6 test positions are designed to carry out sample test and blank test at the same time; the operation of the equipment is stable, providing users with accurate and reliable test data.

 

(2) WGT-S transmittance haze tester

 

Measurement range: transmittance 0 ~ 100.0%, haze 0 ~ 30.00%; accuracy: transmittance ≤ 1%, haze H ≤ 0.5% for ± 0.1%, H > 0.5% for ± 0.3%; repeatability: transmittance 0.5%, haze H ≤ 0.5% for ± 0.05%, H > 0.5% for ± 0.1%.

 

5、Testing process

 

(1) Cut 3 pieces of 80 mm diameter specimens randomly from the surface of carpet samples and place them in the desiccator for 7 d.

 

(2) Clean the fogging cup, glass piece and gasket, etc. and dry them completely.

 

(3) After the specimen is dried, turn on the fogging tester and set the temperature of the high-temperature bath to 100℃.

 

(4) Test the fogging value of the glass piece by using the transmittance fogging tester.

 

(5) Place three specimens in three fogging cups, take another fogging cup and add 10±0.1g of diisodecyl phthalate (DIDP) standard substance for control test, then place the seal, filter paper, and the measured fogging value of the glass sheet on top of the fogging cup, with the test side of the glass sheet facing downward.

 

(6) Put the fogging cup into the high temperature bath of the fogging tester which has been thermostated to 100℃, connect the cooling device, the temperature of cooling water is 21℃, and heat for 3h.

 

(7) After the test, remove the glass piece, fogging side up placed in the dryer to dry 1h, and then test its gloss.

 

6、Test results

 

The haze value of all 4 glass plates before the test is 0. The haze values of the corresponding glass plates of the 3 specimens tested after the test are 0.13%, 0.16% and 0.15%, respectively. The haze value of the glass plates of the control test after the test is still 0. Therefore, the average value of the test results of the 3 specimens is 0.15%.

 

7、Conclusion

 

This test first used the atomization tester to make the volatile substances in the specimen volatilize and condense on the glass plate, and then evaluated the effect of the condensed substances on the haze of the glass plate by the haze method. The test results showed that the substances volatilized by the sample increased the haze of the glass plate after condensing on the glass plate. In general, the more volatile substances, the greater the effect on the haze of the glass plate. In addition, different kinds of volatile substances will also affect the haze value of glass plate. Ltd. is a high-tech enterprise specializing in the research and development and production of packaging testing equipment and packaging testing services, always committed to providing customers with high-quality testing equipment and testing services, to understand the information about the equipment and testing services, you can visit www.labthink.com查看. Labthink is looking forward to improving technical communication and cooperation with enterprises and institutions in the industry.