PROCESS OF DEPOSITION OF COAT ON CUTTING EDGES Russian patent published in 2000 - IPC

Abstract RU 2146565 C1

FIELD: deposition of polytetrafluoroethylene coat on cutting edges of shaving blades. SUBSTANCE: in accordance with invention edge of blade is sprinkled with aqueous dispersion of polytetrafluoroethylene containing from 0.15 to 0.5 % by mass of polytetrafluoroethylene. Polytetrafluoroethylene coat is heated by its treatment with ionizing radiation in presence of oxygen-carrying gas till radiation dose up to 50.0 Mrad is obtained and then polytetrafluoroethylene coat is baked. Starting polytetrafluoroethelyne material used in process should have molecular mass from 1.000.000 to 2.000.000. After formation of polytetrafluoroethylene coat on edge of blade with coat is exposed to action of oxygen-carrying atmosphere prior to its treatment with ionizing radiation. Ionizing radiation in the form of electron beam or gamma radiation is used in process. Radiation dose amounts to 3.0 to 30.0 Mrad, more precisely from 18.0 to 22.0 Mrad. Radiation dose should be such that after irradiation 10.0 % by mass of polytetrafluoroethylene reduces its molecular mass to value not less than 100.000. Irradiation is carried out in the air. Coated blade is subjected to action of oxygen-carrying atmosphere after irradiation and before baking of coat. technical result of process lies in decrease of appreciable force during first- fifth shaving as compared with traditional blades. EFFECT: improved shaving conditions . 8 cl

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RU 2 146 565 C1

Authors

Brajan Ehdvard Koston

Ehdvin Llojd Glehsson

Dates

2000-03-20Published

1994-05-26Filed