| 摘要 |
PURPOSE:To decrease gas penetration from an adhesive layer and residue of an adhesive when a sealant is removed by selecting a sealant, which seals an air supply holes of a battery case, having a specified thickness of adhesive layer and a specified peeling-off strength. CONSTITUTION:A button type zinc air cell is formed with a positive case 1, air holes 2, a sealing plate 3, a sealing ring 4, a positive catalyst layer 5, a positive water repellent film 6, a negative zinc 7, a separator 8, an air diffusion paper 9, and a sealant 10. The sealant 10 is specified so that the thickness of an adhesive layer is 20mum or less and the peeling-off strength is 100-300g/cm<2>. By specifying the thickness of the adhesive layer, gas penetration from the adhesive layer is decreased to increase storage life of a cell, and by specifying the peeling-off strength of a sealant, the residue of an adhesive in a battery case, when a sealant is removed, is prevented. |
