| abstract |
A resin tank having high durability even when hot water is stored and a method for manufacturing the same are provided. A resin tank (1) for storing hot water of a hot water supply system is provided that includes at least a resin layer composed of a polybutene resin and an antioxidant. The polybutene resin is composed of a high molecular weight polybutene resin having a number average molecular weight (Mn) of 150,000 to 300,000 and a weight average molecular weight (Mw) of 750,000 to 1,000,000, and the antioxidant. Is composed of a high molecular weight antioxidant. The resin tank 1 is provided with a plurality of ribs 6 along the outer periphery from the middle part to the lower part. [Selection] Figure 1 |