| 摘要 |
PURPOSE:To insert, irrespective of a container to be used, an aerosol container piston easily whether from above or below, and improve the firm fitting of the piston inside the internal surface of the cylindrical part of the container. CONSTITUTION:An aerosol container piston 10 is comprised of an upper member 11, made of a pressurized-gas-impermeable, rigid synthetic resin material, in which a top wall and a cylindrical, circular wall are integrated, and a lower member 12 having an upper cylindrical wall 12a which fits inside the internal surface of the circular wall of the upper member 11, and it is slidably stored in an aerosol container 1 having a nozzle 5 on a cover 6 at its upper end. In this aerosol container piston 10, the lower member 12 is made of a soft synthetic resin material capable of swelling by a pressurizing liquefied-gas 30 filled into the aerosol container 1. A lower cylindrical wall 12b with a maximum outside diameter part 12d which is firmly fitted inside the internal surface of the cylindrical part 2 of the aerosol container l is integrally formed below the upper cylindrical wall 12a, and the original maximum outside diameter of the lower cylindrical wall 12b is made smaller than the inside diameter of the cylindrical part 2 of the aerosol container 1. |
