Industry Test Program for Interlayer Equivalency.

摘要

After the announcement in 1980 that Monsanto will have to discontinue production of their interlayer 'Saflex PT' due to the non availability of 3 GH plasticizer, an Industry team, under the auspices of the Aerospace Industries Association (AIA), was formed to identify and obtain approval for a replacement interlayer. A test program was derived to examine the physical, mechanical and operational characteristics of candidate replacement materials and compare them to those of the current PVB/3GH. Typical production batches of material were procured and the test program was completed by an Industry cooperative effort. The program demonstrated a high degree of equivalency and finally resulted in FAA approval of an interlayer as a general direct replacement for all existing designs of glass windshields utilizing PVB/3GH interlayer in either a bird bouncing or bird bagging mode. It is believed that this is the first time a windshield materials has received FAA approval without the usual expensive certification program normally required for each design.