Engines
PPG Showcases Improved Windshields, Windows
PPG Aerospace is introducing new materials for improved aircraft windshields and windows.
PPG has developed new technology windshields for Airbus A320 airliners. The U.S. company says that these will age better than earlier designs.
PPG has developed new technology windshields for Airbus A320 airliners. The U.S. company says that these will age better than earlier designs.

PPG Aerospace is introducing new materials for improved aircraft windshields and windows. For the Airbus A320 family of airliners, the French company has developed a new windshield featuring two new PRC sealants used to improve moisture resistance: PR-2060 polyurethane, which has a low moisture vapor transmission rate, has been added as an internal sealant behind the Z-retainer (a part that holds plies together); and PR-1425CF chromate-free sealant has replaced PR-1425 as the outboard moisture seal for the windshields it has a faster cure rate and is less environmentally harmful. 

To defend against delamination, S-123 urethane bonds the outboard and middle glass plies, in lieu of a urethane-vinyl-urethane sandwich. According to PPG, the material maintains elasticity better even when cold. It also prevents cold chipping and resists moisture damage.

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