In the Renault D42 1008 standard, developed by the French Renault automobile company, the cold brittleness requirements of plastic or rubber-coated textile materials and plastic sheets used in vehicles are explained and test methods are defined.
Cold brittleness is the cracking or splitting fracture that occurs due to the inhibition of elongation and impact resistance below a certain transition temperature, for example room temperature or lower.
In the automotive industry, plastic or rubber-coated textiles are widely used, especially in the interior of vehicles. These materials, which mainly feature mechanical strength, ease of processing, lightness and versatility, are expected to resist acceptable thermal and environmental resistances and show strong wear resistance. The cold brittleness properties of these materials are important at this point. In long-term use, the negative effects of cold on the plastic or rubber-coated textile material appear as fragility. Internal stresses that occur within this material in cold weather conditions are the main cause of cold brittleness. Cold brittleness manifests itself as sensitivity to impulse stresses.
Especially in vehicles used in cold regions, this situation is frequently encountered in interior upholstery materials. On the other hand, it is a known fact that artificial leather products such as plastic or rubber coated fabrics are more durable than real leather. For this reason, this type of material wears out quickly and cold brittleness is an inconvenience despite the finishing processes.
Plastic sheets are plastic sheets produced from three thin layers of polypropylene. At the same time, a double-walled plastic sheet is produced by placing a corrugated plastic layer between two flat sheets. It is widely used in the automotive and decoration industries. The main advantages of these sheets are that they are resistant to UV rays, show high thermoforming ability, comply with the mechanical values of the sector and have high color sensitivity.
Among the numerous test, measurement, analysis and evaluation studies it provides for businesses in various sectors, our organization also provides plastic sheet cold fragility testing services for plastic or rubber coated textiles within the scope of Renault D42 1008 standard, with its trained and expert staff and advanced technological equipment.
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