Banda anti-friccion extrusionada para cabezal de afeitado y cabezal de afeitado que comprende dicha banda.

Abstract

Banda anti-fricción para maquinilla de afeitar desechable obtenida por extrusión a partir de una mezcla polimérica que comprende un material polimérico insoluble y el óxido de polietileno, caracterizada por un coeficiente de frotación dinámico (KD) inicial del orden de 0,2 o inferior y por el hecho de que la mezcla que se trata de extruir comprende exclusivamente, como óxido de polietileno, un producto de un peso molecular medio superior a 3,5 millones.
The anti-friction strip of the invention for a discardable razor is obtained by extruding a polymer mixture comprising an insoluble polymer material and polyethylene oxide. It has an initial coefficient of dynamic friction (KD) of the order of or less than 0.2. The mixture for extrusion includes, as its polyethylene oxide, only a substance whose mean molecular weight is greater than 3.5 million. The strip is preferably obtained by extruding a mixture comprising polystyrene and polyethylene oxide having a mean molecular weight greater than 4 million, and in particular a single polyethylene oxide having a molecular weight greater than 7 million. The invention also provides a shaving head having the above-specified anti-friction strip fixed thereto by ultrasonic welding.

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