Polycarbonate (PC)

Polycarbonate (PC) is the only type among the five major engineering plastics offering excellent transparency, alongside outstanding all-round performance. Thanks to its lightweight, high-strength properties and superior optical clarity, it has become a cornerstone material for automotive lightweighting, notably as an alternative to conventional glass.

💡 Key Performance Advantages

PC is highly favoured across the automotive and new energy sectors largely due to several key characteristics:

• Exceptional Lightweighting Potential: With a density of around 1.2 g/cm³—roughly half that of conventional glass—replacing glass windows with PC delivers a significant weight reduction of 40% to 50%.

• Superior Impact Resistance: Ranking among the toughest of all engineering plastics, PC can even achieve blast- and bullet-resistant grades, effectively enhancing cabin safety.

• Outstanding Optical Performance: Boasting a light transmission rate of 87% to 91% and a high refractive index of 1.587, it is an ideal material for optical components such as headlamp lenses and light guides.

• Robust Thermal Stability and Flame Retardancy: Capable of long-term operation across an extensive temperature range of -60°C to 130°C, it possesses inherent flame retardancy and complies with UL94 V-2 standards.

🚗 Key Automotive Applications

Backed by these strengths, the use of polycarbonate is expanding beyond conventional components into more critical, forward-looking areas, establishing itself as an indispensable material in modern automotive design.

Note: Despite its impressive performance, PC has lower surface hardness than traditional inorganic glass, requiring specialised hard-coating treatments to ensure long-term scratch and wear resistance. Furthermore, its adoption is now expanding beyond passenger cars into broader smart mobility and low-altitude transport sectors (such as flying cars).