| 摘要 |
PROBLEM TO BE SOLVED: To provide a paper made cold insulator which is environment-friendly and not harmful against a human body by a method wherein some sheets of paper im mersed with water are overlapped to each other, the sheets are inserted into respective rubber bag or synthetic resin bag, protected and frozen. SOLUTION: Several tens sheets of paper 1 are overlapped to each other, the sheets are immersed with water, they are inserted into a bag 2 in each of chambers of rubber and synthetic resin and protected by it. Although this refrigerating material can be folded, this material is frozen in a freezer and used. In addition, the extremity of the bag 2 in each of the chambers made of a synthetic resin can be opened or closed so as for moisture and paper 1 to be supplemented. Since the refrigerating member having such a configuration as above can be folded, it is possible to use it while its area is being reduced during freezing operation and its area is being made wide during its use. In addition, due to the fact that the paper 1 and water are applied at raw material, this is environment-friendly and even if the bag 2 is damaged or broken, no dangerous state of contamination of chemicals occurs against human body or items. Further, since several tens of papers 1 are overlapped to each other and frozen, it takes much time until every sheet is defrosted and the cold insulation can be assured for a long period of time. |
