Razor blade, its preparation method and application

A razor and blade technology, applied in the field of improvement of razors and blades, can solve the problems of increased blade radius, dullness, and reduced shaving effect, so as to slow down the dullness of the blade, enhance the strength of the blade, and achieve excellent shaving. performance effect

Inactive Publication Date: 2006-07-12
THE GILLETTE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] During use, the blade peaks with the hard coating and Teflon outer layer become dull after repeated use, resulting in increased blade radius and less overall perceived shave

Method used

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  • Razor blade, its preparation method and application
  • Razor blade, its preparation method and application
  • Razor blade, its preparation method and application

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Embodiment Construction

[0013] Referring to FIG. 1 , a razor blade 10 is shown comprising a substrate 12 , an inner layer 14 , a hard layer 16 , a cover layer 18 and an outermost layer 20 . Substrate 12 is generally made of stainless steel (other substrates can also be used) and is sharpened at its extreme edge to form a knife peak with a radius of less than 1000 Angstroms, preferably 200-300 Angstroms, and has a profile with sides 22 of 15-30 Angstroms. degrees, preferably an included angle of 19 degrees, measured 40 microns from the blade edge.

[0014] The inner layer 14 is used to promote adhesion of the hard coat to the substrate. Examples of suitable inner layer materials are niobium- or chromium-containing substances. The individual inner layers are made of niobium with a thickness greater than 100 Angstroms, preferably less than 500 Angstroms. The use of an inner layer of niobium is described in patent PCT92 / 03330.

[0015] The hard coat layer 16 provides improved strength, corrosion resis...

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Abstract

A razor blade includes a substrate with a cutting edge defined by a sharpened tip and adjacent facets, a layer of hard coating on the cutting edge, an overcoat layer of a chromium containing material on the layer of hard carbon coating, and an outer layer of polytetrafluoroethylene coating over the overcoat layer.

Description

field of invention [0001] This invention relates to improvements in razors and blades. Background of the invention [0002] Razor blades are generally constructed of a suitable matrix material such as stainless steel, and the cutting edges consist of wedge-shaped peaks with a radius of less than 1000 angstroms, for example between about 200-300 angstroms. Hard outer coatings such as diamond; amorphous diamond, diamond-like carbon (DLC) materials, nitrides, carbides, oxides or ceramics are often used to increase strength, corrosion resistance and shaving ability while allowing Thinner blades use less cutting force while maintaining the required strength. A polytetrafluoroethylene (PTFE) outer layer can also be used to reduce friction. An inner layer containing niobium or chromium can help improve the adhesion between the substrate, typically stainless steel, and the hard carbon coating. The construction and processing of the cutting edges of razor blades are described in U...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B26B21/60
CPCB26B21/60
Inventor N·索南伯格A·祖克C·怀特S·汉恩C·J·克里普斯通
Owner THE GILLETTE CO
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