| 摘要 |
PURPOSE: To prevent a content from oxidizing, and improve the preserving property by providing a sheet body with an oxygen-absorbing layer which is stored in a cap main body, and a packing made of an elastic body, and at the same time, specifying the hardness of the packing made of an elastic body. CONSTITUTION: A cap 1 is equipped with a cap main body 10, sheet body 20 with an oxygen-absorbing layer 21 which is stored in the cap main body 10, and a packing 25 made of an elastic body. Also, the cap main body 10 is equipped with a top plate part 5 and a skirt part 7 which is connected to the peripheral edge of the top plate part 5. In addition, the sheet body 20 is formed into a laminated structure of the oxygen-absorbing layer 21 and a porous protective layer 22. In the meantime, the packing 25 made of an elastic body which is arranged under the sheet body 20 is formed into a specified shape, and has an opening 25a which is smaller than the internal diameter of a mouth part. Then, the hardness of the packing made of an elastic body by JIS-K6301 spring type hardness test A type is specified in a range of 40-80. |
