Method of treating razor blade cutting edges
AssigneeThe Gillette Company
InventorHoang M. Trankiem
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Abstract
The present invention relates to an improved method of forming a polyfluorocarbon coating on a razor blade cutting edge comprising the steps of subjecting a fluorocarbon polymer having a molecular weight of at least about 1,000,000 to ionizing radiation to reduce the average molecular weight to from about 700 to about 700,000; dispersing the irradiated fluorocarbon polymer in an aqueous solution; coating said razor blade cutting edge with the dispersion; and heating the coating obtained to melt, partially melt or sinter the fluorocarbon polymer.
Claims18
A method of forming a polyfluorocarbon coating on a razor blade cutting edge comprising the steps of:
- (a) subjecting a tetrafluoroethylene polymer powder having an average molecular weight of at least about 1,000,000 g/mol to a dose of ionizing radiation of from about 20 to about 80 megarads to reduce the average molecular weight from about 700 to about 700,000
- (b) dispersing the irradiated fluorocarbon polymer in an aqueous solution which is free of chlorofluorocarbon solvents;
- (c) coating said razor blade cutting edge with the dispersion;
- and
- (d) heating the coating sufficiently to adhere the fluorocarbon polymer to the blade edge.
A polyfluorocarbon-coated razor blade cutting edge produced by the steps comprising:
- (a) Subjecting a tetrafluoroethylene polymer powder having a molecular weight of at least about 1,000,000 to a dose of ionizing radiation of from about 20 to about 80 megarads to reduce the average molecular weight to from about 700 to about 51,000
- (b) dispersing the irradiated fluorocarbon polymer in an aqueous solution which is free of chlorofluorocarbon solvents.
- (c) coating said razor blade cutting edge with dispersion;
- and
- (d) heating the coating sufficiently to cause the fluorocarbon polymer to adhere to the blade edge.
Dependencies are inferred from the claim text.