Coated razor blade

Details Coated razor blade Coated razor blade

1975-09-19

1977-03-15

Gwinnell, Harry J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Edge feature

3034653, 427258, 427284, 428422, 428463, B32B 302, B32B 1508

Patent

active

040125513

ABSTRACT:
The specific embodiments provide a razor blade comprising at least one cutting edge, and an adherent fluorocarbon polymer coating on the cutting edge. The coating has microscopic raised portions. There is also provided a method of treating a razor blade comprising depositing on the cutting edge of the blade a composition comprising a first fluorocarbon polymer and a second fluorocarbon polymer having a molecular weight greater than the first polymer. The deposited composition is heated at a temperature sufficient to cause the first polymer to melt and flow and insufficient to cause the second polymer to melt and flow. Alternatively, the molecular weights of the two polymers are chosen to be sufficiently different such that when the two polymers melt during a heating step the viscosity of the high molecular weight second polymer is sufficiently high to avoid or at least minimize flow.

REFERENCES:
patent: 2754223 (1956-07-01), Caroselli
patent: 2976257 (1961-03-01), Dawe et al.
patent: 3019206 (1962-01-01), Robb
patent: 3224094 (1965-12-01), Esemplare
patent: 3283117 (1966-11-01), Holmes et al.
patent: 3498826 (1970-03-01), Caroselli et al.
patent: 3560595 (1971-02-01), Phillips et al.
patent: 3697309 (1972-10-01), Werner

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