Actually it appears that photo is of a Beech C-99 that struck a bird while descending into SOW. The NTSB narrative refers to the windshield as glass:
https://www.ntsb.gov/_layouts/ntsb....ev_id=20091104X23538&ntsbno=WPR10IA045&akey=1
Makes sense, when toughened laminate shatters, the little particles of toughened are normally held together pretty well by the laminating process, but a bird going into it at X knots would be over and above normal scope.
Toughened glass is very hard to break, but when it does, it breaks into relatively safe particles, which can still cut, but are not shards that will cut arteries.
Having it break and blow into the cabin is not ideal in an aircraft.
The laminated interlayer (PVB) is similar to that used in regular laminated glass, various thickness annealed glass, 2 pieces, held together with a 0.38mm interlayer, often windscreen high performance (WHP) interlayer of 0.76mm is used.
So toughened laminate is very strong, but when it breaks it is supposedly held together to keep the opening secure, used sometimes in high security displays for jewellry, but also in even more layers for bullet proof glass.
Generally that used multiple layers of glass and lexan to aid different break points of the materials against a projectile, and 1.52 interlayers, often 4 or 5 different glazing layers with an interlayer heat bonded between each.
Has to be made to size, mostly for armoured vehicles etc, usually flat.
Anyway, enough on the glass, as you can see I have an obsession with it.
