| 摘要 |
PURPOSE:To provide the plug body of a plastic container for liquid chemicals which perfectly maintains the sealing state of a mouth part and a sealing member, is further provided with the hating and welding position of the mouth part and a sealing part on the outer side of a rubber plug and has no possibility, at all that the molten resin spills on the rubber plug or the molten resin scrap falls onto the rubber plug and impairs sanitation. CONSTITUTION:This plug body consists of a container having a flange 6 in the mouth part 3, a rubber plug enclosing part 8 fitting tightly in this mouth part 3 and the sealing member formed with a flange 9 on the peripheral edge in the upper part thereof. Detaining means which fit and hold the sealing member in the mouth part 3 of the container in the state of once opening a spacing between the flange 9 of the sealing member and the flange 6 of the container are provided in the mouth part 3 of the container and the sealing member 7. A hermetic sealing means 13 which bring the two flanges 6, 9 into pressurized contact with each other by tightly fitting the rubber plug enclosing part 8 of the sealing member 6 into the mouth part 3 of the container after heating the flanges 6, 9 is provided. |
