COVER FOR LOCKING CONTAINERS
<Fulltext not available> The cover comprises a carrier layer with external printing on the smooth outer face and an inward facing sealing layer which is embossed on the free side to a depth of NOTGREATER 50 microns allowing easier isolation of individual covers. An Independent claim is made for a process for manufacturing the container cover in which a sealing layer is extruded or coextruded onto a carrier material and the laminate passed between pressure and cooling rolls with the carrier facing the pressure roll. The surface pattern of the cooling roll is transferred onto the extruded coating to form an embossed sealing layer. Lids for closing containers by means of a sealed seam, the lids containing a carrier material with outwardly directed printing and an inwardly directed, embossed sealing layer in relation to a container to which the lids are applied,characterised in that the sealing layer is an extrusion layer or coextrusion layer applied to the carrier material by extrusion coating or coextrusion coating, the sealing layer is provided on the exposed side with embossing with a roughness height of up to 50 µm and the exposed side of the carrier material displaying the printing is smooth and unembossed. Lids according to claim 1, characterised in that the roughness height is 3 to 30 µm, expediently 3 to 20 µm and advantageously 5 to 10 µm. Lids according to claim 1, characterised in that the sealing layer contains a coextrusion layer consisting of an adhesion promoter and/or a primer and a heat-sealable thermoplastic. Lids according to claim 3, characterised in that the sealing layer contains heat-sealable thermoplastics from the group consisting of polyolefins, preferably polyethylenes or polypropylenes, copolymers or terpolymers of ethylene or polyesters or polystyrenes or polyamides or copolymers or terpolymers thereof. Lids according to claim 1, characterised in that the carrier material contains unembossed thermoplastics or an unembossed cellophane or an unembossed cellulose-containing material or an unembossed metal foil or a combination of these materials. Lids according to claim 5, characterised in that the carrier material contains a combination of at least a thermoplastic and/or a cellophane and/or a cellulose-containing material and/or a metal foil in the form of a multi-layer unembossed composite material. Lids according to claim 6, characterised in that the carrier material contains a barrier layer against gases, vapours and moisture from the group consisting of ceramic layers or metallised layers or a plastic film or a metal foil. Lids according to claim 6, characterised in that the sealing layer has a weight per unit area of 30 g/m2 or less, expediently 2 g/m2 to 20 g/m2, advantageously 2 g/m2 to 15 g/m2 and, in particular 5 g/m2 to 10 g/m2. Lids according to claim 8, characterised in that the sealing layer is a coextrudate, containing an adhesion promoter as an extrusion layer with a weight per unit area of 2 to 10 g/m2, advantageously 2 g/m2 to 8 g/m2, and an extrusion layer consisting of a thermoplastic with a weight per unit area of 3 g/m2 to 25 g/m2 and, in particular 5 g/m2 to 10 g/m2. Process for the production of lids for closing containers by means of a sealed seam, the lids containing a carrier material with outwardly directed printing and an inwardly directed, embossed sealing layer in relation to a container to which the lids are applied, characterised in that an extrusion layer or coextrusion layer is applied to the carrier material by extrusion coating or coextrusion coating, thereby forming the sealing layer, and the carrier material coated with the sealing layer is guided between a pressure roll and a cooling roll with the application of pressure, the carrier material being directed towards the pressure roll, the extrusion layer or coextrusion layer being directed towards the cooling roll and the surface configuration of the cooling roll being transferred to the extrusion coating or coextrusion coating as a reversed image, thereby forming an embossed sealing layer. Process for the production of lids according to claim 12, characterised in that the cooling roll has a surface configuration consisting of a roughness pattern with a roughness height of up to 50 µm, expediently 3 to 30 µm, advantageously 3 to 20 µm and, in particular 5 to 10 µm.