Dispensing nozzle having a tubular exit zone comprising vanes

A process for dispensing foamable products with a nozzle comprising a tubular exit zone having an inlet and an outlet, comprising the steps of:

• a) supplying a liquid foamable product comprising at least one blowing agent to the inlet of the tubular exit zone,
• the tubular exit zone having an inner wall surface defining a passageway for dispensing, the passageway having a centerline axis;
• the tubular exit zone further having a plurality of vanes attached to the inner wall surface parallel to the centerline axis with the vanes extending radially into the passageway for dispensing;
• the vanes having a length having a length dimension, a thickness having a thickness dimension, and a width having a width dimension,
• the thickness dimension being smaller than the width dimension, and the width dimension being smaller than the length dimension;
• the length dimension being a distance the vane contacts the inner wall surface parallel to the centerline axis, and the thickness dimension being an effective thickness of the vane at the inner wall surface perpendicular to the centerline axis;
• and
• the width dimension being a distance from the inner wall surface that the vane extends into the passageway for dispensing;
• and
• wherein the vanes do not connect or touch at the centerline of the passageway for dispensing;
• and
• b) dispensing the liquid foamable product from the outlet of the tubular exit zone.