Which materials for automotive interiors and accessories should be tested for their atomization performance أداة الاختبار –

Which materials for car interiors and accessories should be tested for atomization performance

With the research on car air pollution and the promulgation and implementation of \" Guidelines for Assessing Air Quality in Passenger Cars”, people pay more attention to cars. Indoor air quality is becoming increasingly important. However, at present, domestic, European, American and Japanese automobile manufacturers have made vehicle interior air pollution an important part of quality control. Currently, automobile manufacturers control the air quality in cars mainly through the management of supporting parts and interior materials. Be aware that many car manufacturers have internal regulations to control the generation of odors in the car from the link with materials pfirsts.

1. Main parts or materials for testing atomization performance

Car carpets, leather, plastic parts of dashboards, roof felts, seats and solvents and organic additives contained in glues used in others decorative parts, plastic and rubber parts used in automobiles, fabrics, paints, insulating materials, adhesives and other materials.

2. Classification of materials that need to be tested for atomization 1. Felt products

Carpets, interior covers, seat felts and ceilings used in cars The VOC volatilization of tent felt is relatively high, this which is bonded to the phenolic resin binder (binder) material used in its manufacturing process. Phenolic resin adhesive is synthesized from formaldehyde and phenol, which are generally difficult to react, so the adhesive conwill hold free formaldehyde, which will be released during use. Choosing environmentally friendly adhesives, mats and felts with low or no phenolic resin content is an important way to reduce VOC content in the car, and it is currently technically feasible. Of course, this will increase manufacturing costs.

2. Fabrics

During the processing of tissueics, in order to achieve anti-wrinkle, anti-shrink and flame-retardant effects, or maintain printing and dyeing, formaldehyde should be added during the production process textile to improve the characteristics and feel of the textile. Therefore, these parts have a high formaldehyde content. Especially under high temperature conditions, they continuously release formaldehyde and pollute the car interior environment. It is therefore essential to detect volatilization in fog. .

3. Leather products

Leather products used in the car have a greater impact on the VOCs present in the car. Leather product parts used in cars, such as steering wheel leather, control panel cover, seat cover, headliner cover, etc. VOCs released from leather products mainly include toluene, xylene, formaldehyde, etc. This is related to the leather manufacturing process. In order to improve certain properties of leather, toluene and formaldehyde are used during leather processing (especially combined with tanning and retanning processes).

4. Foam

The foam materials used in the car are mainly polyurethane foam materials, such as the seat cushions and headrests of the car. , ceiling soundproofing panels, dashboards, sun visors, door panels, ceiling coverings and othersinterior parts. Among them, the seat cushion, backrest and headrest are the main test parts. At present, a large number of polyurethanes used are mainly solvent-based, so various residual solvents will be released during use, causing VOC pollution.

5. Paint

Paint is the main source of VOCs in the car. Paint can not only protect and decorate, but also prevent aging and corrosion. , can extend the service life of the material. For example, the peach wood surface of the car steering wheel will be painted with varnish, and the surface of plastic products will also be painted. Solvents and various additives must be used during the spraying process. These are the main sources of VOCs.

6. Auxiliaries

Auxiliaries are a significant invisible source of VOCs.

1. The promoters ofadhesion can be used in phenolic adhesives and polyurethane, epoxy and nitrile sealants to improve wettability and dispersion of fillers and pigments in polymers, and improve adhesion to glass and plastic steel. , copper, aluminum, iron, nylon and other metals and plastic adhesion. Some organic thinners are required during use, and this is the main source of its VOCs

2. The release agent residue will also add VOCs.

3. Car interior cleaning agent, used for daily car cleaning, cleaning chemical fiber, leather, wood, fabric, velvet and other materials in car interiors. Once these cleaning products are used, there will be residues in or on the surface of the cleaned watch, which will generate VOCs.

7. Adhesives

Car interiors use a variety of adhesives based on solvants, such as wallpaper adhesives, pet adhesives, sealing adhesives, plastic adhesives, etc. Adhesives emit formaldehyde, benzene, toluene, xylene and other volatile organic compounds. To avoid adhesive pollution, try to completely evaporate the VOCs after using the adhesive, or use a water-soluble adhesive or hot melt adhesive. However, from the current point of view, compared with solvent-based adhesives, there are certain shortcomings in initial adhesion, water resistance, stability, antifreeze, etc. between water-soluble adhesives and solvent-based adhesives, and the cost is relatively high. .

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