Antichafing strip for shaving equipment head and shaving equipment head comprising same
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United States of America Patent
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Jun 18, 2002
Grant Date -
N/A
app pub date -
Jun 28, 2000
filing date -
Oct 15, 1997
priority date (Note) -
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Abstract
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 (K.sub.D) 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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