Why Did the Windshield Crack by Itself?

1 Answers
McCollin
07/30/25 6:36am
Windshields can crack by themselves due to significant temperature differences between the interior and exterior. Windshields are made of laminated glass or tempered glass, composed of silicon oxide, sodium oxide, calcium oxide, magnesium, etc. Laminated glass involves bonding a transparent adhesive plastic film between two or three layers of glass, combining the toughness of plastic with the hardness of glass to enhance its resistance to breakage. Tempered glass is produced by quenching ordinary glass to create internal stress, thereby increasing its strength. When impacted and broken, tempered glass shatters into small, blunt-edged fragments that do not harm occupants.
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