Method of coating a razor blade

Patent metadata

Field	Value
Publication number	US-2023373120-A1
Application number	US-202318198959-A
Country	US
Kind code	A1
Filing date	May 18, 2023
Priority date	May 20, 2022
Publication date	Nov 23, 2023
Grant date	—

Abstract

A method of making a razor blade by forming a cutting edge on a substrate having an outer bonding surface. A first self-assembled monolayer having a non-fluorinated organic material is deposited on the outer bonding surface of the substrate.

First claim

What is claimed is:

1 . A method for making a razor blade comprising:
forming a cutting edge on a substrate having an outer bonding surface; depositing a first self-assembled monolayer comprising a non-fluorinated organic material on the outer bonding surface of the substrate.

2 . The method of claim 1 , further comprising curing the first self-assembled monolayer after depositing the self-assembled monolayer on the outer bonding surface of the substrate.

3 . The method of claim 2 , wherein the curing is by at least one of UV curing or thermal curing.

4 . The method of claim 3 , wherein the curing is by UV curing with UV light having a wavelength of between 100 nm and 400 nm.

5 . The method of claim 1 , wherein, before the first monolayer is deposited, treating the sharpened cutting edge with plasma using a further comprising gas mixture comprising a process gas and a carrier gas.

6 . The method of claim 5 , wherein the process gas is selected from the group consisting of: molecular oxygen, water, and alcohol; and the carrier gas comprises one or more gases selected from the group consisting of: nitrogen, argon, helium, neon, krypton, xenon, and radon.

7 . The method of claim 1 , wherein depositing the first self-assembled monolayer comprises one or more of: vapor deposition, dipping, flooding, spraying, or soaking.

8 . The method of claim 1 , wherein depositing the first self-assembled comprises vapor deposition.

9 . The method of claim 1 , wherein a temperature does not exceed 300° C.

10 . The method of claim 1 , further comprising depositing a second self-assembled monolayer comprising a non-fluorinated organic material on the first self-assembled monolayer.

11 . The method of claim 1 , further comprising depositing the second self-assembled monolayer comprising a non-fluorinated organic material on the outer bonding surface of the substrate.

12 . The method of claim 1 , further comprising: forming the outer bonding surface by depositing at least one layer of material comprising one or more of: (i) diamond, amorphous diamond, or diamond-like-carbon (DLC); or (ii) chromium, platinum, boron, chromium diboride, titanium, titanium diboride, vanadium, aluminum, silicon, magnesium, manganese, iron, cobalt, nickel, copper, silver, zinc, tin, hafnium, tantalum, tungsten, zirconium, molybdenum, or niobium, and oxides, nitrides, and oxynitrides thereof on the substrate, wherein the at least one layer of material is disposed between the substrate and the first self-assembled monolayer.

13 . The method of claim 1 , further comprising: depositing at least one layer of material on the substrate prior to depositing the first self-assembled monolayer comprising a non-fluorinated organic material on the outer bonding surface of the substrate.

14 . A method for making a razor blade comprising:
forming an outer bonding surface on a sharpened cutting edge of a razor blade by depositing a first material on the sharpened cutting edge; treating the outer bonding surface to form a treated outer bonding surface; depositing a first monolayer comprising a non-fluorinated organic material on top of the treated outer bonding surface; and curing the first monolayer to form a cured first monolayer.

15 . The method of claim 14 wherein the curing of the first monolayer comprises UV curing.

16 . The method of claim 14 wherein the forming the outer bonding surface, the treating the outer bonding surface, the depositing one or more monolayers and the curing are performed at a processing temperature that does not exceed 300° C.

17 . The method of claim 14 wherein the forming the outer bonding surface, the treating the outer bonding surface, the depositing one or more monolayers and the curing are performed at a processing temperature below that does not exceed 200° C.

18 . The method of claim 14 further comprising depositing a second monolayer comprising a non-fluorinated organic material on the cured first monolayer followed by curing the second monolayer.

19 . The method of claim 14 wherein curing the second monolayer comprises UV curing.

20 . The method of claim 14 , wherein depositing the monolayer comprises one or more of: vapor deposition, dipping, flooding, spraying, or soaking.

Assignees

• Gillette Co Llc

Inventors

• Skrobis Kenneth James
• Slattery Jason Scott
• Petrie Jonathan Raymond
• Salisbury Lauren Michelle

Classifications

• C23C28/347

  with layers adapted for cutting tools or wear applications · CPC title

• C23C28/30

  Coatings combining at least one metallic layer and at least one inorganic non-metallic layer · CPC title

• B05D2350/60

  Adding a layer before coating · CPC title

• B05D5/08 Primary

  to obtain an anti-friction or anti-adhesive surface (rendering particulate materials free-flowing in general, e.g. making them hydrophobic B01J2/30) · CPC title

• B05D3/141

  Plasma treatment · CPC title