Reinforced rubber hose

摘要

A reinforced rubber hose is described which possesses a reinforcing layer consisting of polyamide fibres and a rubber layer which abuts against the reinforcing layer and consists of an EPDM material. This EPDM material contains CaO or MgO in an amount sufficient to reduce the effect of the EPDM material to accelerate the ageing of the polyamide fibres to a required degree, but is not sufficient to increase the permanent pressure loading of the vulcanised rubber above a predetermined level. If a hose of this kind is used as cooling water hose it completely fulfils the requirement for freedom from maintenance.