Paperboard with improved wet tear strength

A container comprising a plurality of walls defining a cavity for containing an article, wherein at least one of said plurality of walls comprises a composite paperboard structure comprising a backing structure adhered to a paperboard layer, said backing structure consisting of:

• a) an oriented polymer film layer;
• b) a thermal bonding polymer layer adjacent and substantially coextensive thereto, said thermal bonding polymer layer having a thickness between 10% and 40% of a combined thickness of the oriented polymer film layer and the thermal bonding polymer layer;
• and
• c) a reinforcing scrim polymer layer adjacent and substantially coextensive with the thermal bonding polymer layer;
• wherein the oriented polymer film layer, the thermal bonding polymer layer, and the reinforcing scrim polymer layer each individually comprise a synthetic condensation polymer,
• the synthetic condensation polymers each comprising, in polymerized form:
• 1) a) a carboxylic acid or a mixture of carboxylic acids, and b) either i) a diamine or a mixture of diamines, or ii) a diol or a mixture of diols, or
• 2) an ω-amino -acid having more than 2 carbon atoms, or a mixture of such amino acids,
• wherein, for the backing structure taken as a whole,
• at least 90 mol % of a combined total amount of the carboxylic acid or the mixture of carboxylic acids in the synthetic condensation polymers is the same carboxylic acid,
• at least 90 mol % of a combined total amount of the diamine or the mixture of diamines in the synthetic condensation polymers is the same diamine,
• at least 90 mol % of a combined total amount of the diols or the mixture of diols in the synthetic condensation polymers is the same diol, and
• at least 90 mol % of a combined total amount of the amino acid or the mixture of amino acids in the synthetic condensation polymers is the same amino acid.