Ideal Windshield Material Properties
Strong
Able to Withstand Fracturing
Moldable
Transparent
Affordable
Most Commonly Used Plastics
Acrylic or Polymethyl Methacrylate (PMMA)
Polycarbonate (PC) ← Ideal for use in the solar car windshield as PC is tough, stable, and transparent. PC is often used in many engineering applications due to its strength and design flexibility (moldability). PC is 250x stronger than glass and 50x stronger than acrylic.
Polyethene (PE)
Polypropylene (PP)
Polyethylene Terephthalate (PETE or PET)
Polyvinyl Chloride (PVC)
Acrylonitrile-Butadiene-Styrene (ABS)
Source: https://www.acplasticsinc.com/informationcenter/r/7-different-types-of-plastic-and-how-they-are-used
Types of Polycarbonates
Clear Polycarbonate ← Best option for solar car windshield applications
Coloured/Tinted PolycarbonateMirrored PolycarbonateBulletproof Polycarbonate
Abrasion-Resistant (AR) Polycarbonate
Anti-Static Polycarbonate
flame Retardant Polycarbonate
FDA-Approved Polycarbonate
Multiwall Polycarbonate
Source: https://www.acplasticsinc.com/informationcenter/r/7-different-types-of-plastic-and-how-they-are-used
Types of Clear Polycarbonates
Polycarbonate Clear SL Sheet ← In terms of affordability and properties, SL sheets would be the ideal material to use for the windshields for the solar car. Also sold in various thicknesses to suit our needs.
Clear TUFFAK SL2 Polycarbonate Sheeting
TUFFAK GP Sheeting
Source: https://www.acplasticsinc.com/informationcenter/r/types-of-polycarbonate-sheeting
What makes a feasible canopy windshield design?
Aerodynamics
Ease of Manufacturing
Types of Polycarbonate Forming/Molding Techniques
Vacuum Forming (Thermoforming)
Pressure Forming (Thermoforming)
Twin-Sheet Forming (Thermoforming)
Injection Molding
Note: The polycarbonate forming techniques used is dependant on the complexity of the windshield shape. More complex windshield/canopy shapes would require pressure forming while simpler shapes would require vacuum forming.
Types of Windshield Designs/Shapes
Cockpit (Vacuum Forming)
Backfin (Pressure Forming for back windshield due to sharp edge)
Bullet (Vacuum Forming )