Cartridge for an aerosol-generating system

An aerosol-generating system, comprising:

• an aerosol-generating device comprising a power source and a main body;
• a cartridge removably inserted into the main body, the cartridge comprising:
• a liquid storage portion configured to hold a liquid aerosol-forming substrate and comprising a housing including an air flow channel therein;
• and
• a heater assembly comprising:
• an electrically insulating support having an aperture,
• an electrical heating element disposed across the aperture in the electrically insulating support, the electrical heating element being substantially flat,
• capillary material, wherein a portion of the capillary material is in contact with the electrical heating element, and the capillary material is configured to convey the liquid aerosol-forming substrate to the electrical heating element, and
• two electrical contacts respectively connected to ends of the electrical heating element, the two electrical contacts supported by the electrically insulating support;
• and
• a mouthpiece comprising at least one air inlet and at least one air outlet,
• wherein the capillary material is integrally formed as a single continuous piece of capillary material,
• wherein the capillary material comprises ceramic,
• wherein the two electrical contacts are provided on the ceramic,
• wherein the electrical heating element comprises one flat filament disposed in a curved manner between the two electrical contacts,
• wherein the electrical heating element is fluid permeable, and
• wherein the capillary material comprises:
• a pore size of 0.5 to 10 μm and a density of below 2 g/ml, or
• a pore size of 15 to 40 μm and a density of below 1 g/ml.

An aerosol-generating system, comprising:

• an aerosol-generating device comprising a power source and a main body;
• a cartridge removably inserted into the main body, the cartridge comprising:
• a liquid storage portion configured to hold a liquid aerosol-forming substrate and comprising a housing including an air flow channel therein;
• and
• a heater assembly comprising:
• an electrically insulating support having an aperture,
• an electrical heating element disposed across the aperture in the electrically insulating support, the electrical heating element being substantially flat,
• capillary material, wherein a portion of the capillary material is in contact with the electrical heating element, and the capillary material is configured to convey the liquid aerosol-forming substrate to the electrical heating element, and
• two electrical contacts respectively connected to ends of the electrical heating element, the two electrical contacts supported by the electrically insulating support;
• and
• a mouthpiece comprising at least one air inlet and at least one air outlet,
• wherein the heater assembly extends over an opening of the liquid storage portion,
• wherein the capillary material is integrally formed as a single continuous piece of capillary material,
• wherein the capillary material comprises ceramic,
• wherein the two electrical contacts are provided on the ceramic,
• wherein the electrical heating element is fluid permeable, and
• wherein the capillary material comprises:
• a pore size of 0.5 to 10 μm and a density of below 2 g/ml, or
• a pore size of 15 to 40 μm and a density of below 1 g/ml.