Airlaid Forming Screen Design and Vacuum Systems
topic
Airlaid forming screen aperture geometry and vacuum suction level beneath the screen determine the fibre deposition uniformity and through-thickness fibre distribution, with screen open area of 20 to 40 percent and vacuum of 2 to 8 kilopascals creating the differential pressure that draws individual fibres to the screen surface and retains them in the web position against the air flow disruption from subsequent forming head zones.
Role
Controls the fibre deposition process that determines web uniformity through vacuum-assisted screen collection that draws and retains individualised fibres in their deposited position, with screen design and vacuum uniformity across the full forming width being critical for achieving the cross-direction weight uniformity that is the primary quality parameter for airlaid nonwovens in hygiene and wipes applications.
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