A NEW PAPER-MACHINE CONCEPT FOR COPY PAPE R-PRODUCTION

Copy paper quality requirements are subject to continuous change. Whil e good runnability in the copying machine was the most important aspec t some years ago, this is taken for granted today. Simple copy papers are no longer competitive, but additional requirements such as laser p rinter compatibility inkjet suitability and application oi recycled fi bers have to be met. Paper machine 6 of Neusiedler AG at Ulmerfeld-Hau smening, Austria was rebuilt in summer 1995. The machine produces thre e layer copy paper alter the rebuild. The combination oi different fur nishes has an strong impact on quality requirements (Sandvich Technolo gy). The key elements of the paper machine are as follows: Three layer Step Diffuser Headbox, Cross machine basis weight control by dilution water, Duoformer CFD (Gapformer), Intensa S Shoepress. The machine pr oduces copy papers ranging from 60 to 100 g/sqm at a maximum machine s peed of 1200 m/min after the rebuild. Copy machine runnability and cro ss machine basis weight profiles of the new three layer paper are exce llent. Dry contents of 50% are achieved after the shoe press running 8 0 g/sqm at 1150 m/min.