Volatile Substance Detection Scheme in Car Carpet

The content of volatile substances in automobile carpets has an important impact on air quality and sight in the confined space of the car. This paper evaluates the influence of volatile substances in the samples on the line of sight by testing the fogging performance of carpet samples, and introduces the test principle, equipment FT-F1 fogging tester and WGT-S light transmittance haze tester parameters. It provides a reference for detecting the content and influence of volatile substances in fabrics such as automobile carpets.

 

Scheme details

 

Abstract: The content of volatile substances in automobile carpets has an important impact on the air quality and sight in the confined space of the car. This paper evaluates the influence of volatile substances in the samples on the line of sight by testing the fogging performance of carpet samples, and introduces the test principle, equipment FT-F1 fogging tester and WGT-S light transmittance haze tester parameters. It provides a reference for detecting the content and influence of volatile substances in fabrics such as automobile carpets.

 

Keywords: volatile substances, atomization performance, atomization tester, volatile substance content, gloss, haze, weighing, car carpet

 

1. Meaning

 

Carpet is an important car interior part, with anti-skid, anti-noise, vacuuming, waterproof and other functions. Car 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. Volatile substances such as incompletely reacted monomers and residual solvents in the adhesive are gradually released into the air during use, and the volatilization of these substances will be accelerated when the temperature inside the car is high. These volatile substances may float in the air in the sealed compartment of the car and endanger human health, or condense on the windows to affect the sight of driving. Therefore, it is very necessary to monitor and evaluate the content of volatile substances in automobile carpets in time.

 

2. Test samples

 

Take a certain car carpet on the market as a test sample.

 

3. Test basis

 

There are many relevant test methods for the content of volatile substances in automotive interior parts, such as ISO 6452-2007 "Determination of fog condensation properties of rubber or plastic coated fabrics for automotive interior decoration", PV3920 "Haze of non-metallic interior materials" According to relevant standards, the evaluation methods for volatile substances can be mainly divided into two categories: one The first category is the evaluation of quantity, that is, the quality of the volatile substances is tested by the gravimetric method; the other category is the evaluation of the influence of volatile substances on the driving sight by the gloss method or the haze method. In this paper, the haze method is used for the test.

 

4. Test equipment

 

In this paper, FT-F1 haze tester and WGT-S light transmittance haze tester are used to test, the former is independently developed and produced by Jinan Languang Electromechanical Technology Co., Ltd.

 

4.1 Test principle

 

To simulate the volatilization process of volatile substances, the sample is heated and volatilized in a fogging cup. A glass plate is placed above the fogging cup. The glass plate is equipped with a condensation device. The volatilized substances from the sample will condense on the glass plate, and the test is over. After removing the glass plate, the haze value of the sample can be obtained by comparing the haze value of the test glass plate before and after condensation.

 

4.2 Scope of application

 

(1) FT-F1 atomization tester

 

It is suitable for the evaluation of the evaporation of volatile substances in automobiles, aircrafts and other interior materials, such as automobile interior plastic parts, polyurethane, textiles, leather, adhesives, non-woven fabrics and other materials at high temperatures, and can also be used for car front xenon gas Determination of high temperature atomization of lamps; suitable for high temperature volatile component testing of plastic raw material particles; can be extended to the volatile testing of carpets, leather, sponge, rubber and other products under high temperature conditions; 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 transmittance haze tester

 

It is suitable for the test of light transmittance and haze of all transparent and translucent parallel plane samples (plastic plates, sheets, etc.), and the determination of turbidity or clarity of liquid samples (water, beverages, etc.).

 

4.3 Device Parameters

 

(1) FT-F1 atomization tester

 

The temperature control range of the high temperature tank is from room temperature to 150°C, and the temperature control accuracy is ±0.1°C; the temperature control range of the low temperature tank is 0~100°C, and the temperature control accuracy is ±0.1°C; 6 test positions are designed, which can be tested at the same time. Sample test and blank test; the equipment runs stably, providing users with accurate and reliable test data.

 

(2) WGT-S transmittance haze tester

 

Measuring range: light transmittance 0 ~ 100.0%, haze 0 ~ 30.00%; accuracy: light transmittance ≤ 1%, when the haze H≤0.5% is ±0.1%, when H>0.5% is ±0.3%; Repeatability: light transmittance of 0.5%, ±0.05% when haze H≤0.5%, ±0.1% when H>0.5%.

 

5. Test process

 

(1) Three samples with a diameter of 80 mm were randomly cut from the surface of the carpet samples and placed in a desiccator to dry for 7 days.

 

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

 

(3) After the sample is dried, turn on the atomization tester and set the temperature of the high temperature tank to 100°C.

 

(4) Use a light transmittance haze tester to test the haze value of the glass sheet.

 

(5) Place the three samples in three fogging cups respectively, take another fogging cup and add 10±0.1g of diisodecyl phthalate (DIDP) standard substance for the control test, and then in the Place a sealing ring, filter paper, and a glass piece of which haze value has been measured on the fogging cup, with the test side of the glass piece facing down.

 

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

 

(7) After the test, remove the glass piece, place it in a desiccator with the atomized side facing up for 1 hour, and then test its gloss.

 

6. Test results

 

The haze values ​​of the 4 glass plates before the test were all 0. After the test, the haze values ​​of the 3 samples tested corresponding to the glass plates were 0.13%, 0.16% and 0.15% respectively. After the test, the haze values ​​of the glass plates in the control test were The degree value is still 0, so the average of the 3-piece test results is 0.15%.

 

7. Conclusion

 

In this test, the volatile substances in the sample were first volatilized and condensed on the glass plate by the atomization tester, and then the influence of the condensed substances on the haze of the glass plate was evaluated by the haze method. The test results show that the volatilized substances of the sample increase the haze of the glass plate after condensing on the glass plate. In general, the more volatile matter, the greater the effect on the haze of the glass sheet. In addition, different kinds of volatile substances can also affect the haze value of the glass sheet.