Originally Posted by DrivenDaily
The front windows on the 'Bu have laminate between two pieces of glass. It makes the ride a lot quieter. With the glass broken like that I'd have to assume that the glass is not tempered like on the rear doors or back window. Tempered would shatter into small pellets, but that one didn't. That is so weird! Any evidence of a strike of some sort, like a rock or BB?
The laminate isn't in the windshield to make the car quieter. All cars have this type of windshield and have had them for many years.
"Laminated glass is a type of safety glass that holds together when shattered. In the event of breaking, it is held in place by an interlayer, typically of polyvinyl butyral (PVB), between its two or more layers of glass. The interlayer keeps the layers of glass bonded even when broken, and its high strength prevents the glass from breaking up into large sharp pieces. This produces a characteristic "spider web" cracking pattern when the impact is not enough to completely pierce the glass.
Laminated glass is normally used when there is a possibility of human impact or where the glass could fall if shattered. Skylight glazing and automobile windshields typically use laminated glass. In geographical areas requiring hurricane-resistant construction, laminated glass is often used in exterior storefronts, curtain walls and windows. The PVB interlayer also gives the glass a much higher sound insulation rating, due to the damping effect, and also blocks 99% of transmitted UV light."
Thank you for posting that authoritative information about windshields, lamination, and how they react to being struck. I'm sure it's unassailable since the content of your posts always reflects forethought and grounded sources. That type of content is what helps to make this such a great site.
I'm sure the information you researched and posted is accurate for what you were talking about, but it doesn't actually apply to what I was talking about.
Please notice that I didn't indicate the windshield but the front windows, you know, the ones in the doors. Even though I didn't specify that detail it is understood when I later say that the rear doors don't have the quiet glass.
I'm sure you already know this next point or can research it, but for the sake of some of our younger members, Ford first put laminated side curtain windows in cars back before you were even born, but discontinued doing so because not enough people were as interested in safety back then as they are now. I've never come across any info where they detected that it was also quieter and used it for that reason, but I've not spent any real time researching that point, either.
Since you took the effort to make certain pieces of your text bold to emphasize the point you're making I'd like to respond to that, if I may.
Instead, look past the bold sections to the last sentence. It says the PVB interlayer ALSO (meaning that safety was obviously the first concern) gives the glass a much higher sound insulation rating. Your first words were that the lamination isn't in windshields to make them quieter, but that doesn't discount the fact that they inherit that property as a result of being laminated, does it? So even if I had
said that the windshield was quieter than tempered glass, which I didn't, I would have been correct. However, the tenor of your comments suggests that I was talking about the windshield. But I wasn't.
Let's stop beating around the bush, eh? Is the reason you chose to post this correction of my comments simply because you misunderstood my post? Or is it because sometimes my posts aren't as well-thought-out as you'd like or they contain opinions that parade as fact? I've admitted many times on this forum that I don't have all the answers. And I've admitted when I've been wrong. I'm not perfect and don't put myself out there as being such, and I don't mind offering my opinion, since this is
a public forum where all opinions are invited. I also ask questions and accept the expertise of others, including you, whom I actually respect. I'm sure you'll recall my opinions on the merits of FWD over RWD. Your post on that subject set me straight. It was and still is valuable information. But getting jack-slapped ain't fun and I'll let you know rather quickly.
I invite you to continue adding valuable content as you usually do. I'll continue to read your posts with mouth shut and ears open.