| 摘要 |
PURPOSE:To prevent contamination of contents through compressed gas and lowering of pressure of the gas from occurring, by using a material through which a crack or change in quality is not occurred even if an inner cylinder is smashed throuh the compressed gas when the contents of the inner cylinder is reduced. CONSTITUTION:A container is constituted with an outer cylinder, an inner cylinder made of plastics and an upper lid provided with a valve system, and compressed gas is enclosed into a space between the outer and the inner cylinders. At least one layer of the above inner cylinder which is made into multilayer hollow plastics is made of one kind or mixture of thermoplastic fluororesin, ethylene-vinyl alcohol copolymer polymide and polyester which are superior in their nonpermeability for compressed gas, such as fleon, and the other layer is made of polyolefin which is superior in its low cost, flexibility and moldability. |
