| 摘要 |
PROBLEM TO BE SOLVED: To cost effectively obtain an antireflection film of which the low- refractive index layer has an excellent adhesion property to a high refractive index hard coating layer without using costly and intricate equipment, etc., by forming the high-refractive index hard coating layer of the antireflection film as a specific gel film. SOLUTION: The high-refractive index layer of the antireflection film constituted by laminating the hard coating layer 2 having a high refractive index and the low-refractive index layer 3 on a transparent base material film 1 is composed of the gel film which is formed from a sol liquid contg. the oxide sol of titanium or tantalum and a reactive org. silicon compd. in a liquid medium and has a refractive index of >=1.65. Any films are usable as the transparent base material film, insofar as the films have transparency. Uniaxially or biaxially stretched polyester is used adequately in terms of excellent transparency and heat resistance and absence of optical anisotropy. The metal oxide sol of the titanium or tantalum is preferably formed by hydrolyzing the respective metal alkoxides. |
