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 a razor blade coating by a physical vapor deposition method through performing a deposition with a single composite target composed of dissimilar materials with their area ratio defined to be varied in the single composite target in the direction of transferring the razor blade subject to the deposition, thereby forming a single layer in which the composition ratio of the dissimilar materials gradually changes in the thickness direction of the coating layer to improve the durability of the razor blade coating layer.
Claims20
A razor blade, comprising:
- a blade substrate on which a blade edge is formed;
- a hard coating layer coated on the blade substrate, wherein the hard coating layer comprises chromium and boron and is formed such that an atomic ratio of chromium to boron in the hard coating layer varies in a thickness direction;
- 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 of the razor blade by polishing the heat-treated blade substrate;
- forming a hard coating layer by performing a physical vapor deposition (PVD) on the heat-treated blade substrate having the blade edge by using a single sputter target, in which metal and boron are mechanically combined and mixed, such that an atomic ratio of metal to boron in the hard coating layer varies in a thickness direction;
- and
- forming a polymer coating on the hard coating layer.
Dependencies are inferred from the claim text.