Razor blade coating

Patent metadata

Field	Value
Publication number	US-9469040-B2
Application number	US-77935410-A
Country	US
Kind code	B2
Filing date	May 13, 2010
Priority date	May 15, 2009
Publication date	Oct 18, 2016
Grant date	Oct 18, 2016

Abstract

A razor blade that includes a substrate with a cutting edge, the substrate includes (a) a thin-film of a first material disposed thereon, the thin-film having a thickness less than 1 μm; (b) a mixed nitride-thin-film interregion disposed at or adjacent a surface of the thin-film and a surface of the substrate; and (c) a nitride region disposed adjacent the mixed nitride-thin-film interregion.

First claim

What is claimed is:

1. A razor blade comprising a substrate with a cutting edge, the substrate comprising:
a. a thin-film of a first material disposed thereon, the thin-film having a thickness less than 1 μm;
b. a mixed nitride-thin-film interregion disposed at and adjacent a surface of the thin-film and a surface of the substrate; and
c. a nitride region disposed adjacent the mixed nitride-thin-film interregion.

2. The razor blade of claim 1 wherein the substrate further comprises a mixed nitride-substrate interregion disposed adjacent the mixed nitride-thin-film interregion beneath the surface of the substrate.

3. The razor blade of claim 1 wherein the first material comprises a material selected from the group consisting of a metal, a metal alloy, a metal carbide, a metal oxide, a metal nitride, derivatives and combinations thereof.

4. The razor blade of claim 3 wherein the metal is selected from the group consisting of Ta, Ru, Ni, V, Ti, Pt, Cr, Nb, Hf, W, Zr, Ag, Re, Pd, Fe, and combinations thereof.

5. The razor blade of claim 1 further comprising a coating of a second material disposed over the nitride-thin-film interregion, the nitride region, or both.

6. The razor blade of claim 5 , wherein the second material comprises a material selected from the group consisting of a metal, a metal alloy, a metal carbide, a metal oxide, a metal nitride, diamond, amorphous diamond, diamond-like carbon, boron, boron nitride, derivatives and combinations thereof.

7. The razor blade of claim 6 wherein the metal is selected from the group consisting of Ta, Ru, Ni, V, Ti, Pt, Cr, Nb, Hf, W, Zr, Ag, Re, Pd, Fe, and combinations thereof.

8. The razor blade of claim 5 further comprising a fluoropolymer-containing coating over the second material.

9. The razor blade of claim 1 further comprising a fluoropolymer-containing coating over the mixed nitride-thin-film interregion, the nitride region, or both.

10. The razor blade of claim 1 wherein the cutting edge comprises a wedge-shaped tip that has an included angle of less than thirty degrees and a tip radius of less than about 1,000 Angstroms.

Assignees

• Skrobis Kenneth James
• Gillette Co

Inventors

• Skrobis Kenneth James

Classifications

• B26B21/60 Primary

  by the coating material · CPC title

• C23C14/586

  Nitriding · CPC title

• C23C28/322

  only coatings of metal elements only · CPC title

• C23C28/00

  Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D · CPC title

• C23C14/35

  by application of a magnetic field, e.g. magnetron sputtering {(C23C14/3457 takes precedence)} · CPC title