Non-foil packaging laminate, method for manufacturing of the packaging laminate and packaging container produced thereof

A non-foil packaging laminate for induction heat sealing into packages for liquid food or beverage, the non-foil packaging laminate comprising at least one, first, layer of paper or other cellulose-based material, which first paper layer possesses an inner side and is pre-coated with an induction sealing durable coating layer so that the induction sealing durable coating layer is in direct contact with the inner side of the first layer of paper or other cellulose-based material to form a pre-coated first paper layer, an induction heat susceptible metal layer, the induction heat susceptible metal layer being deposited by vapour deposition directly on the pre-coated first paper layer so that the induction heat susceptible metal layer is directly deposited on the induction sealing durable coating layer, at least one layer of liquid-tight, heat sealable thermoplastic polymer material applied onto an inner side of the induction heat susceptible metal layer, the induction heat susceptible metal layer causing heating and melting of the heat sealable thermoplastic polymer material to induce heat sealing in the heat sealable thermoplastic polymer material when the induction heat susceptible metal layer is subjected to a magnetic field during a heat sealing operation, and a second layer of paper or carton laminated to the outside of the first layer of paper or other cellulose-based material, which second paper layer has a surface weight of from 50 to 500 g/m2, the induction sealing durable coating layer providing a receiving surface for the induction heat susceptible metal layer and supporting the induction heat susceptible metal layer during the heat sealing operation, the induction sealing durable coating layer being formed from a composition mainly comprising a polymer selected from the group consisting of polyvinyl alcohol, water dispersible ethylene vinyl alcohol, polyvinylidenechloride, water dispersible polyimide, polysaccharide, polysaccharide derivatives, starch, starch derivatives and combinations of two or more thereof, and the liquid-tight, heat sealable thermoplastic polymer material being polyethylene.

A packaging laminate for induction heat sealing into packages for liquid food or beverage, the packaging laminate comprising at least one, first, layer of paper or other cellulose-based material, an induction sealing durable coating layer in direct contact with an inner side of the first layer of paper or other cellulose-based material, an induction heat susceptible metal layer deposited by vapour deposition on an inner side of said induction sealing durable coating layer, and at least one layer of liquid-tight, heat sealable thermoplastic polymer material applied onto an inner side of the induction heat susceptible metal layer, the at least one layer of liquid-tight, heat sealable thermoplastic polymer material including an innermost layer of the liquid-tight, heat sealable thermoplastic material, the induction heat susceptible metal layer causing heating and melting of the heat sealable thermoplastic polymer material to induce heat sealing in the heat sealable thermoplastic polymer material when the induction heat susceptible metal layer is subjected to a magnetic field during a heat sealing operation, the induction sealing durable coating layer providing a receiving surface for the induction heat susceptible metal layer and supporting the induction heat susceptible metal layer during the heat sealing operation, the induction sealing durable coating layer possessing a higher melting point than the innermost layer of the liquid-tight, heat sealable thermoplastic material, and the liquid-tight, heat sealable thermoplastic polymer material being polyethylene.