I just wanted to understand what are the main properties required for an automobile glass. I understand that for a windshield of an automobile, the material must have high impact resistance but do compressive and tensile strengths also matter that much? For the window glasses in automobiles what properties are required? I have generally observed that the windshield is made of laminated glass and the other glasses are generally toughened glasses. why acrylic material sheets not used commonly in place of these glasses?