Hose for transportation of refrigerant

A hose for transportation of refrigerant comprising:

• an inner layer;
• a reinforcing layer;
• and
• an outer layer;
• the outer layer comprising a thermoplastic resin composition A having a sea-island structure comprising a matrix containing a thermoplastic resin and a domain containing an elastomer,
• the inner layer comprising a thermoplastic resin composition B having a sea-island structure comprising a matrix containing a thermoplastic resin and a domain containing an elastomer,
• a water vapor permeability coefficient of the thermoplastic resin composition A at a temperature of 60° C. and a relative humidity of 100% being 10.0 g·mm/(m2·24 h) or less,
• an oxygen permeability coefficient of the thermoplastic resin composition B at a temperature of 21° C. and a relative humidity of 50% being 0.05 cm3·mm/(m2·day·mmHg) or less,
• a water vapor permeation amount of the hose for transportation of refrigerant being 6.0 mg/(240 h·cm2) or less,
• a hydrofluoroolefin HFO-1234yf permeation amount of the hose for transportation of refrigerant being 170 g/(m2·72 h) or less,
• a mass per 1 m2 of outer surface area of the hose for transportation of refrigerant being 3000 g/m2 or less,
• the water vapor permeability coefficient of the thermoplastic resin composition A being smaller than a water vapor permeability coefficient of the thermoplastic resin composition B,
• the oxygen permeability coefficient of the thermoplastic resin composition B being smaller than an oxygen permeability coefficient of the thermoplastic resin composition A, and
• the thermoplastic resin composition A and the thermoplastic resin composition B being different.