Infrared reflecting glazing for automotive application - New developments to improve fuel efficiency and thermal comfort

摘要

Solar control coatings in automotive glazing improve the thermal comfort for passengers, degrease solar irradiation into the cabin and reduce fading of materials. In IRR glazing solar radiation reduction is performed by silver based low-e-stacks with high visual transmittance and high near infrared reflectance. The proposed ARB regulation for California published 2009 demanded for reduced total solartransmittance T_(ts) of < 50% of automotive glazing in new cars from 2012 on and of < 40% starting 2016. Unfortunately, the regulation was ceased last minute end of March 2010 due to some technical concerns related to proper operation of electronic communication devices. Nevertheless, the technical goals regarding the total solar energy transmittance became a widely accepted performance target for solar heat protection glazing in upcoming new car models for the next years. In order to achieve the challenging new T_(ts) target < 40% major steps forward in coating design and optimization of layer properties are required.