Aerosol-generating article with non-circular perforations in a ventilation zone

An aerosol-generating article, comprising:

• a rod of aerosol-generating substrate comprising between 5 percent to 30 percent aerosol former by weight on a dry weight basis;
• and
• a ventilation zone arranged downstream of the rod of aerosol-generating substrate, wherein the ventilation zone is arranged in a hollow tubular segment of a cardboard aerosol-cooling element, and wherein the ventilation zone is configured as a hollow tubular ventilation zone,
• wherein the ventilation zone comprises perforations, wherein one or more of the perforations have a non-circular cross-section having an ovality, the ovality being a ratio of a large diameter of a perforation divided by a small diameter of the perforation, of at least 1.5, wherein a thickness of the peripheral wall of the ventilation zone is between 0.1 millimeter and 2.5 millimeters, wherein one or more perforations have a width of between 0.05 millimeter and 0.2 millimeter, and wherein one or more perforations have a length of between 0.25 millimeter and 1.0 millimeter.