The interaction of alpha particles irradiation with different commercial polycarbonate foils, from different suppliers was studied, aiming to test the foils as alpha particle detectors, analyzing the effect to the energy to the particles and the response of each material to the chemical etching aimed to reveal latent track. The sensitivity to varying energies and the average backgrounds, which are important parameters to environmental measurements. The efficiency to alpha particles registration and the linearity of the different materials, as referred to the corresponding track density, were compared.