PURPOSE: To prevent bleeding of hose constituting ingredients from occurring from an inner layer of a hose by constituting an inner pipe of a rubber layer as an outer layer, and a resin layer as the inner layer and specifying an amt. of methanol extract and a thickness of the resin layer.
CONSTITUTION: A hose is constituted of an inner pipe 1, a reinforced layer 2 and an outer pipe 3 and the inner pipe has a resin layer 4 as an innermost layer thereof and a rubber layer 5 as the other outer layer. As a resin material constituting the resin layer, a resin with an amt. of methanol extract of 5% or less is used. It is pref. that the thickness of the resin is in a range of 0.005-0.5mm. In addition, it is pref. that the hose is made of a rubbery material with an amt. of isooctane extract of 1g/m2/96hr (at 40°C) or less.
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MITO JUN
KITAMI SATORU
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| JP58114979B | ||||
| JPS5510172A | 1980-01-24 | |||
| JPS61294287A | 1986-12-25 | |||
| JPS5779384A | 1982-05-18 |