A HEAT-SEALABLE PACKAGING SHEET
    1.
    发明申请

    公开(公告)号:WO2022043370A1

    公开(公告)日:2022-03-03

    申请号:PCT/EP2021/073479

    申请日:2021-08-25

    Abstract: A heat-sealable packaging sheet comprising a base sheet of paper, a heat- sealable ethylene layer, a polyamide layer, and a polymer coextrusion coating tie layer, wherein the tie layer, the polyamide layer, and the ethylene layer have been co-extrusion coated together on a second surface of the base sheet, wherein the base sheet constitutes at least 73 wt% of a total grammage of the packaging sheet, and the coextrusion coating constitutes no more than 27 wt% of a total grammage of the packaging sheet, wherein the base sheet has a grammage of 60 to 150 g/m2, and the coextrusion coating has a grammage of 5 to 32 g/m2, wherein the tie layer has a grammage of 1 to 30 g/m2, wherein the polyamide layer has a grammage of 1 to 30 g/m2, wherein the ethylene layer has a grammage of 1 to 30 g/m2, and wherein the ethylene layer essentially consists of a coextrusion coatable copolymer of ethylene and at least one acid comonomer, wherein the at least one comonomer constitutes 5 to 20 wt% of the ethylene layer.

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