Method for transverse cutting of a water-soluble tape

A method for cutting a water-soluble tape comprising the steps of:

• providing an anvil,
• providing a rotating knife roller comprising at least one knife having a cutting edge extending outwards from said rotating knife roller,
• providing a water-soluble tape comprising flat areas comprising a first side and a second side, and single-dose capsules formed inside the water-soluble tape, wherein the single-dose capsules are connected and separated from each other by the flat areas,
• advancing said water-soluble tape in a machine direction at a speed between said anvil and said rotating knife roller with said first side of the water-soluble tape in contact with the anvil, and
• cutting said water-soluble tape with said at least one knife while said water-soluble tape passes between said anvil and said rotating knife roller,
• wherein, during a single cutting cycle, the rotating knife roller rotates with at least one first peripheral speed and a second peripheral speed,
• wherein the second peripheral speed is at least 15% faster than the first peripheral speed and wherein the rotating knife roller rotates at the first peripheral speed when a knife of the at least one knife cuts said water-soluble tape in a direction transverse to the machine direction,
• wherein a ratio between the first peripheral speed and the second peripheral speed is comprised between 1.1 and 1.25.