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The atomization value of the car interior leather is largely affected by the selected tone auxiliary agent and the technology used.
1. From raw material skin to ash
Raw leather contains natural oil%of low molecular weight fatty acids and fatty acids. Both of these ingredients can be foggy Its potential atomization value can reach 5mg.
2. From pickling to wet blue leather
Emulsifiers and fatliquoring emulsions contain slowly evaporating ingredients that remain in the leather.Due to its inherent characteristics, it cannot be removed even through flowing water. Its potential atomization value can reach 10mg.
3. Reunion
Repeated tanner contains unpopular, low molecular weight substances, and volatile ammonium salt. substance. The potential atomization value of this stage can reach 5mg.
4. Add fat to the blanking leather
This stage is the main stage of using atomized materials, whether it is an emulsification system for lipid agents, or insoluble in water in water Oils contain a fabricated substance, and the emulsion stabilizer will also make the problem more serious. At this stage, the potential atomization value can reach 20 mg.
5. Demonly regulating dampness
Various additives used in order to strengthen the dampness of the blanking leather will increase the fog value. These auxiliary agents Including a combination of non -ions and cationic detergents, and anionic emulsion products, the potential atomization value at this stage reaches 5mg.
6. Dyeing to dyeing leather
At this stage, a large amount of fogment materials may be used. In addition to dyes Increased atomization value due to ammonium ammonium. The potential value of this stage can reach 5mg.
7. Switching to finished finished warehouse
In leather decorative materials (especially top coating agents), the residual component of plasticizer and high boiling point solvent is Contains atomized. The potential atomization value at this stage reaches 5mg.
The volatile material content in the car interior jewelry is an important factor affecting the internal environment of the car and driving field of view. In the process of production and functional improvement of automobile interior, it is likely to introduce small portion materials to them, and these materials introduced are volatile, especially when the internal temperature of the car is high, these materials are more volatile. The small portion of the small portion or floating in the air in the car interior jewelry, the air environment that pollutes the internal pollution, is harmful to human health after being inhaled, or condenses on the car window of the car, which has a adverse effect on the driving field. EssenceTherefore, how to test the volatile materials in the car interior parts is a general concern for the automotive industry.
In addition, the safety performance evaluation indicators of automobile interior materials mainly include the content of air pollutants, atomization, flame retardability, and so on. Different indicators for these security tests also have corresponding different standards.
Test of the air pollutant content of the car interior:
According to the source of pollutants, the air pollutant test of non -metal materials, parts and vehicles, respectively. There are three main types of air pollutants in the car: odor evaluation, which mainly depends on human sensory olfactory (VDA270). Electronic nasal test (SAEJ351) can also be used; Air phase chromatography, thermal disconnect attachment, high -efficiency liquid chromatography, etc.; Carbon nitrogen oxide content can be determined, which can be determined by non -divided infrared gases (IOS28370).
At present, the domestic detection of VOC in China has released relevant standards, and there is no relevant standard for VOC testing for non -metal parts. Domestic VOC detection methods for non -metal components in China Not the same.
The detection standards for components and materials include: ISO12219, VDA270, DIN13130, Dinen13725, VDA275, VDA277, VDA278, SAEJ351 and other standards.
The test method and organic pollutant limit requirements of the vehicle are mainly tested and evaluated in accordance with national standard HJ/T400-2007 and IOS27630-2011.
flame retardant test:
The flame retardant test is a test method for delaying the flame continuity, spreading, diffusion and other capabilities. After years of development, flame retardant testing has formed a variety of standards and has become a very important testing project in the relevant industry. Most vehicle interior material combustion performance tests are required to use standard fire sources specified in standards under the harsh test environment to conduct different fire sources on the test materials, and then observe and evaluate the burning of materials.
Flame retardant measurement can refer to the following standards: GB8410-2006, DIN75200, ISO3795, ASTMD5132, FMVSS302, JISD1201, UL94, etc.
atomization test:
Obuilding the internal decorative materials of the car to achieve the control of volatile substances in these materials to effectively reduce the effects to effectively reduce Environmental pollution in the car has become a car and car interior materialsAn important means for production enterprises to control product quality.
At present, the atomization test method of automotive interior materials, including weight method, gloss, and mist, the principle of the same fogThis principle is to achieve the process of becoming fog. The difference is that the measured parameters are condensed group division, fog value or fog.
The standards that can be referred to are German standard DIN75201, US standard SAEJ1756, ASTM D5393, British standard BS EN14288, international standard ISO 6452.
