Hose

A hose having:

• an inner tube rubber layer;
• a substantially cylindrical woven material underlayer having a woven base material and provided on the outer peripheral side of the inner tube rubber layer;
• and
• a reinforcing material layer having a reinforcing material and provided on the outer peripheral side of the woven material underlayer,
• wherein the inner tube rubber layer is made of a rubber composition for a hose inner tube,
• the woven base material is formed by organic fibers made of polyamide (PA) or polyethylene terephthalate (PET),
• the rubber composition for a hose inner tube includes a rubber component and a vulcanization accelerator,
• 100 parts by mass of the rubber component contains at least 60 parts by mass of acrylonitrile butadiene rubber (NBR) therein,
• the inner tube rubber layer has thickness equal to or larger than 0.5 mm, and
• following relationship formula (1) is satisfied,
• A·t+B·C<D (1)
• wherein, in relationship formula (1), “A” represents concentration of sulfate ion in the inner tube rubber layer (unit:
• mol/mm3), “t” represents thickness of the inner tube rubber layer (unit:
• mm), “B” represents concentration of sulfate ion per 1 g of the woven base material (unit:
• mol/g), “C” represents mass of the woven base material per unit area of a cylindrical side portion of the woven material underlayer (unit:
• g/mm2), and “D” represents a constant of 2.5×10−9 (unit:
• mol/mm2).