Flexible plastic film
AssigneeLG Chem, Ltd.
InventorsHye Min Kim, Hyeok Jeong, Yeong Rae Chang, Soon Hwa Jung, Jin Young Park
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Abstract
The present invention relates to a flexible plastic film, and more specifically to a flexible plastic film having excellent flexibility while exhibiting high hardness. According to the present invention, the flexible plastic film exhibits flexibility, bending property, high hardness, scratch resistance and high transparency, and hardly has a risk of damaging the film even in repetitive, continuous bending or long-time folding state, and thereby can be usefully applied to flexible mobile devices, display devices, front face and display unit of various instrument panels, and the like.
Claims11
A flexible plastic film comprising:
- a support substrate having an elastic modulus of 4 GPa or more as measured according to ASTM D882 and a thickness in a range of 20 to 200 μm;
- and a coating layer formed on at least one surface of the support substrate,
- wherein the coating layer comprises a crosslinked copolymer of a 3- to 6-functional acrylate-based binder and a 7- to 20-functional urethane acrylate-based binder;
- and inorganic fine particles having a bimodal cumulative particle size distribution including a first inorganic fine particle group having a d50 diameter of 20 to 35 nm and a second inorganic fine particle group having a d50 diameter of 40 to 130 nm, and
- wherein the first inorganic fine particle group has a d10 diameter of 10 to 19 nm and a d90 diameter of 25 to 40 nm, and the second inorganic fine particle group has a d10 diameter of 25 to 110 nm and a d90 diameter of 60 to 150 nm.
Dependencies are inferred from the claim text.