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Sealing cap i.e. screw cap, for closing bottle neck, has external layer, whose external surface to be indented under axial compression effect of cap and joint against neck such that external surface mates with widemouthed surface of neck
Sealing cap i.e. screw cap, for closing bottle neck, has external layer, whose external surface to be indented under axial compression effect of cap and joint against neck such that external surface mates with widemouthed surface of neck
The cap (1') has a shell (2) and a multilayer joint (3) with a metal layer forming a barrier against gas diffusion. A malleable support layer provides, adjacent set of layers, a malleable global mechanical behavior permitting, in association with a resilient layer, the joint to be subjected to deformation imposed by shaping the joint without formation of folds. An external layer in plastic material has an external surface to be indented under an axial compression effect of the cap and the joint against a neck such that the external surface mates with a widemouthed surface of the neck. The joint is free from a layer in a cellulosic material or in paper e.g. kraft paper. Independent claims are also included for the following: (1) a method for manufacturing a sealing cap (2) a method for capping a neck of a bottle.
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