Apparatus for oxygenating an extruded molten polyethylene film
AssigneeWindmoller & Holscher
InventorFritz Blom
Life of this patent
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Abstract
In a method of oxygenating an extruded molten polyethylene film before it is pressed onto a carrier web between a pressure roller and a backing roller, ozone is blown onto the web substantially in the direction of web movement in the zone thereof where it enters the nip of the rollers.
Claims2
An apparatus for oxygenating an extruded molten polyethylene film before compressing it with a carrier web for joining thereto comprising a pressure roller and a cooling roller forming a backing roller, a wide-slot extrusion nozzle disposed above the nip of the rollers, and an ozone nozzle, characterised in that the ozone nozzle comprises a tube (6) which has blow nozzles (7) arranged in a row, is disposed above the carrier web (3) parallel to the axis of the pressure roller (1), and touches or almost touches the carrier web (3) in the region where it runs onto the pressure roller, the direction of blowing by the nozzles being substantially tangential to the pressure roller (1).
Dependencies are inferred from the claim text.