Back to results
US 9,904,098 B2Granted
Hard coat film, polarizing plate, and image display apparatus
AssigneeNitto Denko Corporation
InventorsTomonori Ueno, Atsushi Kishi, Hiroki Kuramoto
Life of this patent
Estimating the term…
Abstract
Provided is a hard coat film, including: a transparent film; and a hard coat layer formed on the transparent film, in which: the surface free energy of the hard coat layer is equal to or more than a certain value; the hard coat film has a mixed region in which a component of the transparent film and a component of the hard coat layer are mixed; the refractive index of the mixed region continuously changes toward the thickness direction of the hard coat film; and a refractive index change gradient falls within a certain range.
Claims10
A hard coat film, comprising:
- a transparent film;
- and
- a hard coat layer formed on the transparent film,
- wherein:
- the hard coat layer has a surface free energy of 30 mN/m or more;
- the hard coat film has a mixed region in which a component of the transparent film and a component of the hard coat layer are mixed;
- a refractive index of the mixed region continuously changes toward a thickness direction of the hard coat film;
- and
- a refractive index change gradient a (μm−1) specified in the formula (1) satisfies a relationship of 0.003≦a≦0.018:
- a=|nA−nB|/L (1)
- in the formula (1), nA represents a refractive index intrinsic to the hard coat layer, nB represents a refractive index intrinsic to the transparent film, and L represents a thickness (μm) of the mixed region.
8 more elements
Dependencies are inferred from the claim text.