Hard coating film and preparation method thereof
AssigneeLG Chem, Ltd.
InventorsJoon Koo Kang, Eun Kyu Her, Yeong Rae Chang, Soon Hwa Jung, Jin Young Park, Hyeok Jeong
Life of this patent
Estimating the term…
Abstract
The present invention relates to a hard coating film and a preparation method thereof, and, more particularly, to a hard coating film having high hardness and excellent properties and a method of preparing the same. The method is advantageous in that a high-hardness hard coating film, which is not easily curled, can be easily prepared. The hard coating film prepared by this method can be usefully used in various fields because it has high hardness, scratch resistance, transparency, durability, light resistance, light transmittance and the like.
Claims7
A hard coating film, comprising:
- a supporting substrate;
- a first hard coating layer formed on one side of the supporting substrate;
- and
- a second hard coating layer formed on the other side of the supporting substrate,
- wherein the hard coating film satisfies the following Formula 4:
- R/L≧20, in which R is a curvature radius (unit:
- mm) of the hard coating film, and L is an arc length (unit:
- mm) of the hard coating film,
- wherein the first and second hard coating layers are the same or different from one another and independently have a thickness of 50 to 300 μm, and
- wherein the hard coating film has a pencil hardness of 7H or more at a load of 1 kg.
Dependencies are inferred from the claim text.