Razor blades having a wide facet angle
A razor blade including a substrate with a coating joined to the substrate defining a coated blade. The coated blade including a cutting edge being defined by a blade tip having a tip radius of from 50 to 350 angstroms. The coated blade having a pair of first facets extending from the blade tip and a pair of second facets extending from the respective first facets, a facet angle from 90° to 135°, a facet width from 0.38 micrometers to 0.65 micrometers a wedge angle from 5° to 30°, and a thickness of between 0.8 and 1.5 micrometers measured at a distance of 1 micrometer from the blade tip.
1. A razor blade comprising: a substrate with a coating joined to said substrate defining a coated blade, said coated blade comprising a cutting edge being defined by a blade tip, said coated blade having a blade thickness measured within a region at a distance from 2 micrometers to a distance of 4 micrometers from the blade tip, wherein said coating comprises a plurality of materials, one of said materials having a material thickness greater than any other one of said plurality of materials in said region, and wherein said blade thickness is greatest at a distance of 2 micrometers from the blade tip, 3 micrometers from the blade tip, or 4 micrometers from the blade tip.
2. The razor blade of claim 1 wherein said one of said materials comprises a hard coating material.
3. The razor blade of claim 1 wherein said one of said materials comprises a carbon containing material.
4. The razor blade of claim 3 , wherein said carbon containing material comprises diamond-like carbon.
5. The razor blade of claim 1 wherein a shape of said substrate and a shape of said coating are different.
6. The razor blade of claim 1 , wherein said material thickness is greatest at said distance of 2 micrometers from the blade tip, 3 micrometers from the blade tip, or 4 micrometers from the blade tip.
7. The razor blade of claim 1 wherein said blade thickness is between 1.6 and 2.1 micrometers measured at a distance of 4 micrometers from the blade tip.
8. The razor blade of claim 1 , wherein said blade thickness is between 0.38 and 0.67 micrometers measured at a distance of 0.25 micrometers from the blade tip.
9. The razor blade of claim 1 , wherein said blade thickness is between 0.55 and 0.95 micrometers measured at a distance of 0.5 micrometers from the blade tip.
10. The razor blade of claim 1 , wherein said blade thickness is between 1.1 and 1.7 micrometers measured at a distance of 2 micrometers from the blade tip.
11. The razor blade of claim 1 , wherein said blade thickness is between 0.8 and 1.5 micrometers measured at a distance of 1 micrometer from the blade tip.