| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a water tank which is well suitable for environment at low cost. SOLUTION: Recycled pellet material is used as material for a water tank 1 constituting a cooling device for cold beverage in an automatic dispenser or a dispenser. Core-shell type quality improving material having no chemical- resistant characteristic is added to the recycled pellet material. The quality improving material is exposed at the forming surface of a thermal insulating material 4 of the water tank 1, resulting in that a close fitness of the thermal insulating material 4 can be assured while the chemicalresistant characteristic is being assured.</p> |
