A hose of impermeability has a wall corrugated along at least a part of
its length, and formed by an inner thin resin layer, a laminated layer
including a metal film, or a layer formed by a metal film, and an outer
thin resin layer. It has a very high fluid impermeability owing to its
wall layer including or formed by a metal film, and is also very
flexible, capable of absorbing vibration, light in weight and strong. A
tubular inner thin resin layer is formed by extrusion as the innermost
layer of a multi-layered hose wall, and a laminated tape including a
metal film, or simply a metal film is spirally wound or longitudinally
lapped about the inner resin layer.An outer thin resin layer is formed
about a layer formed by the laminated tape, or metal film, and the whole
is at least partly corrugated. Alternatively, corrugation is done before
an outer thin resin layer is formed by electrostatic powder coating. A
different process includes applying a laminated tape including a metal
film about a mandrel to form a tubular laminated layer, and after
removing the mandrel, coating the inner surface of the tubular layer with
a resin powder electrostatically to form a thin resin layer thereon.