RUBBER PART WHICH COMES INTO CONTACT WITH AQUEOUS LIQUID

摘要

PROBLEM TO BE SOLVED: To provide a cooling fluid translocation hose which does not need a washing treatment and does not make any trouble in itself and in a fuel cell system and to provide a rubber material capable of giving the hose.

SOLUTION: A rubber part having an area which comes into contact with an aqueous liquid is provided. At least that area of the part which comes into contact with the aqueous liquid is formed from a rubber vulcanizate having a volume resistivity of at least 1010Ω cm. The rubber vulcanizate is such one that when it is immersed in ten-fold weight of the aqueous liquid having a specific conductivity (at 25°C) of 3 μS/cm or below under conditions of 100°C x 168 h, the specific conductivity (at 25°C) of the aqueous liquid does not exceed 50 μS/cm.

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