一种带密封衬垫的塑料盖,用于容器密封,易于开启。
专利摘要
本发明涉及一种塑料盖(1)和使用该盖的容器(4)。塑料盖(1)包括氧气密封衬垫(8),其连接到容器(4)上喷口(5)的开口端面(6)。盖(1)具有周向裙部(2),其带有内部环形珠(3),用于与喷口(5)中的相应环形槽(7)卡扣连接。衬垫(8)在面向盖(1)的一侧具有第一塑料层(81),该层被布置为在注塑盖(1)时与盖(1)的塑料材料永久结合,在面向容器(4)的一侧具有第二塑料层(82),该层被布置为临时密封到所述开口端面(6)。在面向容器(4)的端部,裙部(2)具有径向突出(10),用作拇指握持部,当打开容器(4)时,允许盖(1)从所述开口端面(6)弯离,从而逐渐破坏衬垫(8)的第二塑料层(82)与喷口(5)的开口端面(6)之间的临时密封。衬垫(8)包括中间层(83),该层由金属材料制成,能够实现盖(1)与容器(4)的开口端面(6)的感应焊接。
Original abstractThe invention concerns a plastic cap ( 1 ) and a container ( 4 ) using same. The plastic cap ( 1 ) comprises an oxygen-tight liner ( 8 ) to be joined to an opening end surface ( 6 ) of a spout ( 5 ) on the container ( 4 ). The cap ( 1 ) has a circumferential skirt ( 2 ) with an internal annular bead ( 3 ) adapted for snap connection with a corresponding annular groove ( 7 ) in the spout ( 5 ). The liner ( 8 ) has on the side facing the cap ( 1 ) a first plastic layer ( 81 ), which is arranged to be permanently joined, when injection-molding the cap ( 1 ), to the plastic material of the cap ( 1 ), and on the side facing the container ( 4 ) a second plastic layer ( 82 ), which is arranged to be temporarily hermetically sealed to said opening end surface ( 6 ). On the end facing the container ( 4 ), the skirt ( 2 ) has a radial projection ( 10 ) which serves as a thumb grip and which when opening the container ( 4 ) allows the cap ( 1 ) to be bent away from said opening end surface ( 6 ) so that the temporary, hermetic seal between the second plastic layer ( 82 ) of the liner ( 8 ) and the opening end surface ( 6 ) of the spout ( 5 ) is gradually broken. The liner ( 8 ) comprises an intermediate layer ( 83 ) which is made of metal material enabling induction welding of the cap ( 1 ) to the opening end surface ( 6 ) of the container ( 4 ).
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