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Razor blades

A razor and blade technology, applied to the coating on the cutting edge of a razor blade and its manufacturing field, can solve the problems of uneven surface morphology on the microscopic scale

Active Publication Date: 2019-09-17
THE GILLETTE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Regardless of whether aqueous or organic based dispersions are utilized, if a spray coating process followed by a subsequent sintering process is utilized, a microscopically inhomogeneous surface morphology typically results on the cutting edge and in the region proximal to the tip of the final blade, which is a shortcoming

Method used

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Embodiment Construction

[0032] The present invention provides novel solvents and processes to provide improved cutting edges.

[0033] The present invention relates to razor blade cutting edges which are formed such that they exhibit improvements in shaving properties. A major aspect of the invention involves the production of novel solvents that have formed a thin coating on the cutting edge with low cutting force and low friction. The term "thin" refers to the thickness of the coating of the razor blades of the present invention. In general, the thinner the coating on the blade becomes, the lower the cutting force and the better the shaving properties. As mentioned above, a common material used for coating blades is a fluoropolymer, polytetrafluoroethylene or PTFE. Likewise, throughout the description of the present invention reference will be made to PTFE without excluding any other material which may be substituted substantially equivalently.

[0034] Due to the inherent properties of polymeri...

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Abstract

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

Description

technical field [0001] This invention relates to razor blades, and more particularly to coatings on the cutting edges of razor blades and their manufacture. Background technique [0002] It is well known in the art that wet razors assembled with fluoropolymer coated blades outperform razors assembled with non-fluoropolymer coated blades. One of the most common fluoropolymers used to coat razor blades is polytetrafluoroethylene or PTFE (or a form of ). Adding a PTFE (eg, telomer) coating to the cutting edge of the blade drastically reduces the cutting force values ​​on beard hair or other types of hair fibers. Reduced cutting force is desirable as it significantly improves shaving attributes, including safety, closeness and comfort. Such known PTFE-coated blades are described in US Patent No. 3,071,856. [0003] There are many types of coating methods that can be used to produce polymer coated (eg PTFE) coated blades. Some processes involve aqueous dispersions of PTFE, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B26B21/60
CPCB05D5/083B26B21/60B05D3/107C09D9/005C09D7/20B05D1/02B05D3/007B05D1/18
Inventor J·S·斯莱特里W·斯特迪范特R·P·布奇利N·索南伯格J·查德威克
Owner THE GILLETTE CO