Are car windows shatterproof?

[BrianErrol]

 

Most car manufacturers will tell you that their cars are safe.

 

We in the industry know from experience that the side and back windows of cars can be smashed very easily.

 

All one needs is a spark plug and one heavy blow and the side windows will explode creating small particles of flying glass all over the place.

 

Glass manufacturers will tell you that these pieces are harmless, but being in the industry we know, after seeing injuries from these small shards, that these windows are far from safe.

 

Some people say they have a higher resistance to breaking then regular glass, so how come a hit with a spark plug makes them explode?

 

We all know that in many major cities throughout the world "smash and grab" through side windows is a reality.

 

Safety film on side and back windows of cars, in these types of environments, is a priority when it comes to making a car safe.

 

The picture above clearly shows the flying glass of side windows under impact.

 

Your comments would be welcome.

 

[Thirtyfive]

Ok..... My comment is what are you selling?

[ultratintsouthport]

[emoji53]...... yes. .... I had one of them but the wheel fell off...

[ultratintsouthport]

Ok..... My comment is what are you selling?

Exploding spark plugs that break side windows...

I'll take 3 thanks. Is a photographed photocopy of an out-of-state Cheque ok?

[emoji12]

[Booms]

These kind of "sneak in the back door" threads never end well......

[TintDude]

Welcome to the forum Brian.

[Pyramids]

Who goes around wasting good spark plugs?

[TintDude]

[Tintguy1980]

 

 

Some people say they have a higher resistance to breaking then regular glass, so how come a hit with a spark plug makes them explode?

 

Tempered glass, which is used for the side windows of most vehicles, is manufactured with an extremely high surface compressive stress and high internal tensile stress, giving it strength and durability, but also leading it to abruptly shatter into thousands of tiny pieces when it breaks. When thrown with moderate speed at a side-window, a sharp shard of the exceptionally hard aluminium oxide ceramic (~ 9 on the Mohs Scale) used in spark plugs focuses the impact energy into a small enough area without blunting to initiate cracking, releasing the internal energy and shattering the glass.^[7] However, ninja rocks are ineffective if the shards are insufficiently sharp, thrown with too little energy, or thrown against windshields, as these are made of a laminated type of safety glass, and therefore do not shatter.

 

Edit: Courtesy of Ask.com