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.

A razor blade including: a substrate having a tip portion including a tip region, a blade body including a base, and first and second outer sides disposed opposite a split line of the substrate that converge at a tip; and first and second coatings disposed substantially on the first and second outer sides, respectively. Also provided is a method of coating the razor blade, including: applying a first coating to at least a portion of the first outer side; and applying a second coating to at least a portion of the second outer side. The first and second coatings each extend from the tip region toward the base and are substantially different, as compared to each other.

A razor blade including: a substrate having a tip portion including a tip region, a blade body including a base, and first and second outer sides disposed opposite a split line of the substrate that converge at a tip; and first and second coatings disposed substantially on the first and second outer sides, respectively. Also provided is a method of coating the razor blade, including: applying a first coating to at least a portion of the first outer side; and applying a second coating to at least a portion of the second outer side. The first and second coatings each extend from the tip region toward the base and are substantially different, as compared to each other.

The invention discloses a novel solution and process comprising a modified solvent for providing enhanced blade edge attributes.

The invention discloses a novel solution and process comprising a modified solvent for providing enhanced blade edge attributes.

A razor blade having a substrate with a cutting edge being defined by a sharpened tip and novel dimensions is provided. The substrate has dimensions of volumes, cross-sectional areas, and thicknesses at or near the ultimate tip (e.g., at a distance up to about 2 micrometers from the sharpened tip). The substrate is coated with one or more materials and has novel volumes, cross-sectional areas, and thicknesses at or near the ultimate tip (e.g., at a distance up to about 2 micrometers from the sharpened tip). The thickness of the substrate at 2 micrometers back from the ultimate tip is at or below about 0.977 micrometers and at or below about 1.173 micrometers for a coated substrate at the same distance. These dimensional values are measured robustly with an atomic force microscope and provide reduced cut forces for improved blade performance.

A razor blade having a substrate with a cutting edge being defined by a sharpened tip and novel dimensions is provided. The substrate has dimensions of volumes, cross-sectional areas, and thicknesses at or near the ultimate tip (e.g., at a distance up to about 2 micrometers from the sharpened tip). The substrate is coated with one or more materials and has novel volumes, cross-sectional areas, and thicknesses at or near the ultimate tip (e.g., at a distance up to about 2 micrometers from the sharpened tip). The thickness of the substrate at 2 micrometers back from the ultimate tip is at or below about 0.977 micrometers and at or below about 1.173 micrometers for a coated substrate at the same distance. These dimensional values are measured robustly with an atomic force microscope and provide reduced cut forces for improved blade performance.

A razor blade including a blade body, an expanded coating structure arranged on a surface of the blade body so as to cover the blade body at least partially, the expanded coating structure including one or more expanded polymer microspheres, at least one of the one or more expanded polymer microspheres including a gas encapsulated within a hollow thermoplastic polymer shell. A process for fabrication of same, including providing a blade body, depositing a liquid suspension, the liquid suspension including expandable polymer microspheres dispersed in a liquid uncured polymer precursor, each expandable polymer microsphere including a gas encapsulated within a hollow thermoplastic polymer shell, on a surface of the blade body to obtain a deposit, and expanding at least a portion of the expandable polymer microspheres in the deposit to obtain an expanded deposit including one or more expanded polymer microspheres arranged on the surface of the blade body, the liquid uncured polymer precursor being configured to remain uncured during expansion of the expandable polymer microspheres. A skincare device including such a razor blade. A process of fabricating same, including attaching such a razor blade to a cartridge.

A razor blade including a blade body, an expanded coating structure arranged on a surface of the blade body so as to cover the blade body at least partially, the expanded coating structure including one or more expanded polymer microspheres, at least one of the one or more expanded polymer microspheres including a gas encapsulated within a hollow thermoplastic polymer shell. A process for fabrication of same, including providing a blade body, depositing a liquid suspension, the liquid suspension including expandable polymer microspheres dispersed in a liquid uncured polymer precursor, each expandable polymer microsphere including a gas encapsulated within a hollow thermoplastic polymer shell, on a surface of the blade body to obtain a deposit, and expanding at least a portion of the expandable polymer microspheres in the deposit to obtain an expanded deposit including one or more expanded polymer microspheres arranged on the surface of the blade body, the liquid uncured polymer precursor being configured to remain uncured during expansion of the expandable polymer microspheres. A skincare device including such a razor blade. A process of fabricating same, including attaching such a razor blade to a cartridge.

A razor blade is provided. The razor blade includes a substrate including a substrate tip, and a first surface and a second surface extending from the substrate tip; and a coating, layered on the substrate, including an ultimate tip, and a first cutting surface and a second cutting surface extending from the ultimate tip and corresponding to the first surface and the second surface, respectively, wherein the first cutting surface includes a first facet extending from the ultimate tip and a second facet extending from the first facet, the second cutting surface includes a third facet extending from the ultimate tip and corresponding to the first facet and the second facet, a first line tangent to the first facet and a second line tangent to the second facet are not parallel, and the ultimate tip is deviated from a central line that divides the substrate in two and passes through the substrate tip.