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

The invention relates to a molded product made of fiber material with a connection element (11). In order to achieve a particularly firm anchoring of the connection element (11) in the fiber material of the molded product, the connection element (11) has a connecting wall (17) with holes (18) through which the fiber material of the molded product projects.

An example system comprises a water-soluble unit dose article comprising a water-soluble fibrous non-woven sheet and a granular laundry detergent. The water-soluble fibrous non-woven sheet is shaped to form a partially sealed internal compartment and has an air permeability comprised between 5 m.sup.3/m.sup.2/min and 200 m.sup.3/m.sup.2/min. The granular laundry detergent is comprised within said internal compartment and comprises a plurality of particles, wherein the plurality of particles comprises zeolite particles. The system comprises sealing jaws, wherein at least one of the sealing jaws is a heated sealing jaw, wherein a bottom seal of the internal compartment is sandwiched between the jaws. The jaws comprise a non-stick coating in contact with the bottom seal and a first dust extraction conduct to direct a gas flow away from an area surrounding a top section of the sealing jaws or away from a bottom section of the internal compartment.

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

The present invention provides a method of producing a unit dose capsule for treatment of a substrate comprising the steps of a. placing a first sheet of water-soluble polyvinyl alcohol film over a mould having sets of cavities, each set comprising three cavities arranged on the sealing plane one after the other in circumferential direction such that footprint area of the second and the third compartments is from 0.8 to 2.5 times the area of the footprint of the first compartment; b. heating and applying vacuum to the film to mould the film into the cavities and hold it in place to form three recesses in the film; a first recess, the second recess, and a third recess, the three recesses being connected to respective side recesses by the film; c. filling three different parts of a substrate treatment composition into the three recesses, the three parts together forming a full substrate treatment composition; d. sealing a second sheet of film to the first sheet of film across the formed recesses to form the sealing web comprising a peripheral sealing skirt and inter-compartment sealing webs; and e. cutting between the capsules so that a series of three compartment capsules are formed, each capsule containing a part of a substrate treatment composition in three compartments.

The present invention provides a method of producing a unit dose capsule for treatment of a substrate, the method comprising steps: a. placing a first sheet of water-soluble polyvinyl alcohol film over a mould having sets of cavities, each set comprising three cavities arranged on the sealing plane one after the other in circumferential direction; b. heating and applying vacuum to the film to mould the film into the cavities and hold it in place to form three recesses in the film; a first recess (502), the second recess (503), and a third recess (504), the three recesses being connected to respective side recesses by the film; c. filling three different parts of a substrate treatment composition into the three recesses (502, 503, 504), the three parts together forming a full substrate treatment composition; d. sealing a second sheet of film to the first sheet of film across the formed recesses to form the sealing web comprising a peripheral sealing skirt (108) and inter-compartment sealing webs (1024, 1023, 1034) having average sealing width in the range of 0.3 to 3 mm between compartments and a central sealing web (10234) thereby separating the compartments (102, 103, 104) from one another to produce a three compartment capsule (101); and e. cutting between the capsules so that a series of three compartment capsules (101) are formed, each capsule containing a part of a substrate treatment composition in three compartments (102, 103, 104).