FIELD: technological processes.
SUBSTANCE: lid material 1 comprises an easily exfoliating laminated sheet, which has an external layer 14 and an internal layer 15, which are laminated in an exfoliating manner, with an interface between them, determined as an exfoliating surface, has round semi-cuts with opening holes 4, created so that they have depth reaching from the side of the internal surface to the exfoliating surface, and has a separating semi-cut 5, which makes it possible to exfoliate by separation of the external layer 14 of the area covering the area that forms semi-cuts 4 opening holes, from the external layer 14 of the other area, formed so that it has depth reaching from the side of the external surface to the exfoliating surface, where depth of formation of semi-cuts 4 that open holes and the separating semi-cut 5 is stabilised. The layer made of a paper layer 8, a polyester layer 9a, an easily exfoliating polymer layer 10, a polyester layer 9b, a sealing layer 11 and a sealing layer 12, and a polyester layer 9b, adjacent to the sealing layer 11, are laminated onto the easily exfoliating polymer layer 10 through the surface exposed to treatment for surface coarsening, thus performing lamination with high rupture strength without usage of an adhesive layer. And the interface between the easily exfoliating polymer layer 10 and the polyester layer 9a, adjacent to the paper layer 8, is set as an exfoliating surface, so that they could exfoliate, and the paper layer 8 is hardened by means of a varnish coating.
EFFECT: design improvement.
4 dwg
