Why Do Car Window Films Develop Bubbles?

1. Quality of the Film Itself: When car owners purchase window films for their vehicles, their limited knowledge about these films can lead to buying low-quality ones. Inferior car films often use conventional dyeing processes, resulting in rough film layers that can exhibit issues such as bubbles and wavy patterns.

2. Installation Process: Many instances of bubbles appearing in the market are due to improper installation. If the glass surface is not thoroughly cleaned before film application and small particles or dust adhere to it, pressure can build up around these particles or dust as the film's adhesive strength increases. This pressure can lead to the formation of bubbles. Additionally, improper folding or delamination during installation can also cause bubbles.

3. Heated Wires on Car Windows: Many car windows feature heated wires, which are used for defrosting in winter. However, this heat can affect the window film. In the continuous cycle of heating and cooling, the adhesive properties of the film can deteriorate, resulting in the development of bubbles.