California 'Cool Car' Regulation Drives Development of High Performance IR-Reflecting Glazing (IRR)

摘要

In Europe IR-reflecting (IRR) glazing is commonly available as option or standard in cars for increased driving comfort. The IRR glazing consists of dielectric - metal - dielectric layer stacks coated directly on glass or on polyester film laminated between two glass panes, with silver as the primary constituent in the metallic layers. Reducing green house gas emissions (GHG) from light and medium duty vehicles is becoming increasingly important to a variety of governmental organizations world wide and one route to this is the reduction of air conditioning usage. To reduce fuel consumption due to air conditioning use, and thereby reducing GHG emission, it is desired to improve IR- energy blocking performance of the vehicle glazing to minimize heating of the cabin. The California Air Resource Board (CARB) has defined solar parameters for vehicle glazing starting in 2012 which in certain cases requires the use of IR reflective coatings. The talk will give an overview about the regulation and reports about the challenges and consequences for coating design and deposition technology to meet the specification in a short period of time.