POLARIZATION FILM, VISIBLE LATENT IMAGE ARTICLE, AND MANUFACTURING METHOD THEREOF

摘要

There is provided a polarization film, a visible latent image article, and a manufacturing method thereof enabling a latent image using a birefringent property to be provided in a visualized state. A polarization film includes a polarization layer transmitting a specific linear polarization component, a circular polarization component, or an elliptical polarization component, and an adhesive layer, a tensile modulus of elasticity E of the polarization film is 0.01 GPa to 7.8 GPa, and a thickness h of the polarization film is 60 μm to 300 μm, and in a visible latent image article which includes the polarization film and the article having a birefringent pattern, the polarization film is peelably affixed to the article having a birefringent pattern through the adhesive layer, and thus a latent image due to the birefringent pattern is visible by the polarization film.

主权项

1. A polarization film which is peelably affixed to an article having a birefringent pattern and visualizes a latent image due to the birefringent pattern, the polarization film comprising:
a polarization layer transmitting a specific linear polarization component, a circular polarization component, or an elliptical polarization component; and an adhesive layer, wherein a tensile modulus of elasticity E of the polarization film is 0.01 GPa to 7.8 GPa, and a thickness h of the polarization film is 60 μm to 300 μm.