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Self-adhesive papers
These consist of multiple layers and are usually constructed as follows: an upper layer of paper that can be printed or written on, a middle layer of adhesive and a lower layer (release paper). This is usually coated with silicon and prevents the adhesive from drying out and becoming soiled (pressure sensitive paper).
Sizing
Sizing is understood to mean making paper, whose fibres are naturally hydrophilic, resistant to penetration by water or vapour. We differentiate between pulp sizing and surface sizing. Often both methods are combined. Nowadays, pulp sizing is primarily effected with synthetic reactive sizing agents (AKD, ASA) in the neutral to weak-alkaline pH-range. Surface sizing agents are applied in the sizing press or film press and consist of synthetic polymer dispersions.
Slitter winder

The slitter winder is used for cutting the batch rolls coming from the paper machine to form rolls that can be sent out to customers and subjected to further processing. The web is cut cleanly and split to the required web width by rotating circular knives.
Modern winding technology ensures even roll tightness and perfect winding quality.









Technical details

  • Web width min. 110 mm / max. 3310 mm
  • Web diameter min 500 mm / max. 1500 mm
  • Winding speed max. 1600 m/min
  • Trim tolerance +/-1.0 mm

Model Vari-Step 43  |  Manufacturer Jagenberg  |  Constructed in 1988

Smoothness
The surface of paper is by nature somewhat uneven in structure. Smoothing in the paper machine (glazing) can improve the surface mechanically. Testing is performed in special measuring devices (e.g. in accordance with Parker Print Surf).
Special papers
The group of special papers covers a wide range of paper categories. They all have special properties that they need for their specific applications. Very often, special raw materials are needed for this sort of paper.
SVI
Association of the Swiss Packing Institute
SVI-EMPA 12
Test standard for determining the surface pH value of paper, card or corrugated board. The surface to be tested is wetted with a given volume of water and the surface pH value is measured with a flat-membrane glass-electrode potentiometer.
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