Sealing jaws and water-soluble unit dose article comprising a fibrous non-woven sheet

A system comprising:

• a water-soluble unit dose article comprising a water-soluble fibrous non-woven sheet and a granular laundry detergent, wherein the water-soluble fibrous non-woven sheet is shaped to form a sealed internal compartment, wherein the granular laundry detergent is comprised within said internal compartment, wherein the water-soluble fibrous non-woven sheet comprises a plurality of fibres, wherein the fibres comprise polyvinyl alcohol polymer, and wherein the granular laundry detergent comprises a plurality of particles, wherein the plurality of particles comprise perfume particles, wherein the perfume particles comprise perfume;
• and
• sealing jaws, whereby at least one of the sealing jaws is a heated sealing jaw, whereby a top seal of the sealed internal compartment is sandwiched between the jaws, whereby a first of said jaws comprises a protruding portion along a longitudinal direction of the seal, the protruding portion having a base along a direction perpendicular to the longitudinal direction of the seal, the base having a dimension of more than about 3 times a thickness of the water-soluble fibrous non-woven sheet and of less than about 20 times the thickness of the water-soluble fibrous non-woven sheet.