Auto-Exterior, Long Term Weathering

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  • Maintain appearance and properties during Sun Light/ UV light exposure.
  • Pursue weight reduction with PP Compounding replacing other materials.
  • Consider the compatibility of functional additives.
  • Stabilize the surface to prevent continuous degradation.
  • Reduce VOC.

Data Explanation

  • SAE J1960 (now updated to J2527) is the accelerated weathering test specification for automotive exterior in US.
  • The reference UV system could extend its service life to 5000hrs.
  • Commodity UV system couldn't provide with enough performance to protect surface gloss even to 4000hrs.
  • If the physical property retention rate is 50% or less, it is regarded as early degradation.