Sealing label

A combination of a label and a package, wherein the package comprises varnished cardboard, the label has been attached to the package such that an opening joint is located between two attachment regions of the label, the label comprising:

• a carrier layer, and
• an adhesive layer,
• wherein the thickness of the carrier layer, the material of the carrier layer, and the composition of the adhesive layer have been selected such that:
• a minimum deformation force of the label is smaller than a first breaking force needed to break the cardboard material of the varnished cardboard,
• a minimum detaching force of the label is greater than the first breaking force, and
• the minimum detaching force is smaller than a second breaking force needed to break the label,
• wherein the first breaking force is a first pulling force which causes breaking of the cardboard material in a situation where the label is separated from the varnished cardboard by pulling the label with said first pulling force, and the minimum detaching force is a second pulling force which is needed to separate the label from the outer surface of the varnished cardboard in a situation where the label is pulled with said second pulling force.

A web, comprising:

• a carrier layer, and
• an adhesive layer,
• wherein the thickness of the carrier layer, the material of the carrier layer, and the composition of the adhesive layer have been selected such that:
• a minimum deformation stress value of the carrier layer is smaller than a minimum breaking stress value of the carrier layer,
• a minimum detaching stress value of the carrier layer is greater than the minimum breaking stress value of the carrier layer, and
• the minimum detaching stress value of the carrier layer is smaller than the tensile strength of the carrier layer,
• wherein the minimum deformation stress value is the stress of the carrier layer in a situation where a label cut from the web is pulled by a pulling force, which causes 30% final elongation of the carrier layer;
• the minimum breaking stress value is the stress of the carrier layer in a situation where a label cut from the web is separated from varnished cardboard by a pulling force, which causes breaking of the cardboard material;
• and the minimum detaching stress value is the stress of the carrier layer in a situation where a label cut from the web is separated from the surface of a varnished cardboard by a pulling force.