用于可重新密封罐,确保密封且易于开启。
专利摘要
为了确保由焊接罐体形成的可重新密封罐容器在容器口卷曲部分和树脂密封衬垫之间的密封能力,而不降低生产率和打开封闭件的容易性。罐体2通过轧制钢板并焊接钢板的搭接纵向边缘来制备。为了实现上述目的,卷曲部分21a上的焊接部分2a的表面上的高度差减小到小于主体部分22上的高度差,具体保持在15至100μm的范围内,并且树脂密封衬垫的硬度保持在根据ISO 868(或JIS-K7215)的HDA 30至70的范围内。
Original abstractTo ensure sealing ability of a resealable can container formed of a welded can body between a curled portion of container mouth and a resin sealing liner, without degrading productivity and easiness to open the closure. The can body 2 is prepared by rolling a steel sheet and welding overlapped longitudinal edges of the steel sheet. In order to achieve the above-mentioned objective, a level difference of a welded portion 2 a on the surface of a curled portion 21 a is reduced smaller than that on the trunk portion 22 , specifically, kept within the range of 15 to 100 μm, and a durometer hardness of the resin sealing liner is kept within the range of HDA 30 to 70 according to ISO 868 (or JIS-K7215).
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