What is the composition of solar film?

Automotive solar films typically consist of 7-8 layers. The main layers include an anti-adhesive layer, adhesive layer, and polyester film. There are various types, such as metallic films and ceramic films, which are considered traditional and may have limitations in heat insulation and signal transmission. The most advanced option is the nano-graphene layer, which also includes a surface wear-resistant layer. Different manufacturing processes result in varying layer thicknesses and sun protection capabilities. Traditional metallic layers, while effective in blocking heat, can interfere with signal transmission.