Hard coat film, polarizing plate, method for producing hard coat film, and method for producing liquid crystal panel

摘要

The object of the present invention is to prevent or suppress occurrences of uneven saponification and blocking, while improving cutting properties and dimensional stability. Specifically disclosed is a hard coat film (130) which comprises a protective film (114) for protecting a polarizer (112), and a hard coat layer (118) that is formed on the protective film (114). The sum of the thickness of the protective film (114) and the thickness of the hard coat layer (118) is less than 40 μm, and the mixed region of the protective film (114) and the hard coat layer (118) is 1-20% of the thickness of the hard coat layer (118).

主权项

1. A method for producing a hard coat film in which a hard coat layer is formed on a protective film to protect a polarizer, and a sum of the thickness of the protective film and the thickness of the hard coat layer is less than 40 μm, comprising the steps of sequentially:
producing the protective film using a solution casting method, humidifying the protective film, and forming the hard coat layer by coating a hard coat coating liquid on the protective film, wherein a moisture content of the protective film is 1.5 to 4% in the step of humidifying the protective film, and wherein a mixed region of the protective film and the hard coat layer is formed at the forming step, and a ratio of the mixed region calculated by the following formula is 11 to 18%:
the ratio of mixed region (%)=[the thickness of the mixed region (μm)/{the thickness of the hard coat layer except for the mixed region (μm)+the thickness of the mixed region (μm)+the thickness of the protective film (μm)}]×100.