| 摘要 |
Metal can end for cans whose contents are under inside pressure A can end (1) made from sheet metal for cans whose contents are under inside pressure is provided with at least one opening tab (4) partly punched from the end leaving a hinge area (6) and a relative aperture (2) formed by the partial punching, with the opening tab (4) and/or the area of the end surrounding the aperture (2) being cold formed so that the edge area (8) of aperture (2) covers the edge area (4a) of opening tab (4) on the end outside (1a). On the end inside (1b), plastisol (10) is applied in ring-form to the edge areas (4a, 8) of opening tab (4) and of aperture (2) and gelled under heat. Before its application and gelation respectively, the plastisol (10) has a viscosity ??D441s-1 (40.degree.C) of about 2000 - 2800 mPa.s, and an edge angle ? of about 0.4 - 1.0 N/mm2, and a maximum elongation of 120 - 250 % (fig. 2a). |
