Razor blade and manufacturing method thereof
AssigneeDorco Co., Ltd.
InventorsMin Joo PARK, Sung Hoon OH, Seong Won JEONG
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Abstract
The present disclosure provides an improvement to razor blade coating by a physical vapor deposition method, by forming a hard coating layer as a thin coating layer in which chromium boride, which is a nanocrystalline structure having high hardness, is dispersed in an amorphous mixture of chromium and boron, thereby improving the strength and hardness of the thin coating layer and securing the bonding force by chromium in the amorphous mixture between the hard coating layer and a blade substrate on which an edge of the razor blade is formed.
Claims16
A razor blade, comprising:
- a blade substrate on which a blade edge is formed;
- a hard coating layer coated on the blade substrate, the hard coating layer including an amorphous region in which chromium and boron are mixed, wherein one or more nanocrystalline structures are dispersed in the amorphous region;
- and
- a polymer coating formed on the hard coating layer.
A method for manufacturing a razor blade, the method comprising:
- performing a heat treatment on a blade substrate;
- forming a blade edge on the blade substrate by polishing the heat-treated blade substrate;
- forming a hard coating layer by performing physical vapor deposition (PVD) on the heat-treated blade substrate, on which the blade edge is formed, by using a single composite target including chromium and boron that are mechanically combined and mixed to provide the hard coating layer including an amorphous region in which the chromium and the boron are mixed, wherein one or more nanocrystalline structures are dispersed in the amorphous region;
- and
- forming a polymer coating on the hard coating layer.
Dependencies are inferred from the claim text.