Shaving aid for razor cartridges comprising a nano-filament

Patent metadata

Field	Value
Publication number	US-11020865-B2
Application number	US-201715632989-A
Country	US
Kind code	B2
Filing date	Jun 26, 2017
Priority date	Jun 30, 2016
Publication date	Jun 1, 2021
Grant date	Jun 1, 2021

Abstract

A shaving aid for razor cartridges comprising water soluble filaments having nano-sized diameters and exhibiting lubricating properties and with improved visual and tactile aesthetics.

First claim

What is claimed is:

1. A razor cartridge comprising:
a. a housing comprising a skin contacting surface;
b. at least one blade having a blade tip; and
c. a shaving aid positioned on said housing to expose a skin contacting portion of said shaving aid on said skin contacting surface, said shaving aid comprising at least one water soluble nano-filament having a diameter of from about 10 nm to about 1000 nm.

2. The razor cartridge of claim 1 , wherein said at least one water soluble nano-filament has an average diameter of from about 300 nm to about 600 nm.

3. The razor cartridge of claim 1 , wherein said shaving aid comprises at least 0.01% by weight of said at least one water soluble nano-filament.

4. The razor cartridge of claim 1 , wherein said at least one water soluble nano-filament forms a nonwoven web.

5. The razor cartridge of claim 4 , wherein said nonwoven web has a thickness of from about 0.01 mm to about 5 mm.

6. The razor cartridge of claim 1 , wherein said at least one water soluble nano-filament has a span of at least 30 um between intersections with other nano-filaments when the shaving aid comprises more than one nano-filament.

7. The razor cartridge of claim 1 , wherein at least a portion of said skin contacting portion has a surface coating, said surface coating comprising said at least one water soluble nano-filament.

8. The razor cartridge of claim 7 , wherein at least 50% of the skin contacting portion, by surface area, is covered by said surface coating.

9. The razor cartridge of claim 7 , wherein said surface coating comprises more than one layer.

10. The razor cartridge of claim 7 , wherein said surface coating has a thickness of from about 0.01 mm to about 20 mm.

11. The razor cartridge of claim 1 , further comprising a second nano-filament.

12. The razor cartridge of claim 11 , wherein said second nano-filament is not water soluble.

13. The razor cartridge of claim 1 , wherein said at least one water soluble nano-filament comprises filament forming material selected from the group consisting of polyvinyl alcohol, quaternary ammonium polymer, polyethylene glycol, polyethylene oxide, polypropylene oxide, and a combination thereof.

14. The razor cartridge of claim 13 , wherein said at least one water soluble nano-filament comprises a copolymer of polyethylene oxide and polypropylene oxide.

15. The razor cartridge of claim 1 , wherein said shaving aid comprises a plurality of nano-filaments, and wherein said plurality of nano-filaments are cross linked.

Assignees

• Gillette Co Llc

Inventors

• Stephens Alison Fiona
• Humphreys Claire Patricia
• Romo Escalante Eduardo
• SPOONER-FLEMING Joia Kirin
• Glassmeyer Stephen Robert
• Pratt Michael Sean
• Calderas Jonathan Javier
• Mao Min
• Edwards Joseph Bryan
• Moloney Michael John

Classifications

• A61K8/027

  Fibers; Fibrils · CPC title

• A61K8/8129

  Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers or esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers, e.g. polyvinylmethylether · CPC title

• A61K2800/412

  Microsized, i.e. having sizes between 0.1 and 100 microns · CPC title

• A61K8/891

  saturated, e.g. dimethicone, phenyl trimethicone, C24-C28 methicone or stearyl dimethicone · CPC title

• A61K8/8152

  Homopolymers or copolymers of esters, e.g. (meth)acrylic acid esters; Compositions of derivatives of such polymers · CPC title