Delpro has developed a simple and extremely efficient system for re-moisturising and curl control of a wide range of coated and uncoated products.
Superheated steam is used which, unlike raw steam, remains a gas and penetrates the internal paper fibre without wetting the surface. For maximum conditioning effect the web should be at or below 35°C prior to entry into the conditioning chamber and must be cooled back down to that temperature afterwards. A spreader roll is used to spread the web and take up any cross web expansion.
Features include:
The conditioner unit comprises a stainless steel insulated chamber with heated letterbox entry an edxit and lid which lifts pneumatically on one side for ease of access.
Inside the chamber the moving web is surrounded by dry gaseous steam introduced by specially designed jets to the underside of the web.
Jet arrangement enables moisture addition to be zoned for web width reduction or preferential addition across the web.
Only factory steam is required which is reduced in pressure and superheated by passing over separately controlled finned tubes.
Variable volume of steam controlled manually or with the additional option of infra red moisteure meter, enables closed loop control of moisture addition.
Can be integrated into existing machine or supplied as on offline unit.