Reeling

Perpendiouiar force acting between paper roli and dnjm [kN/m], [pli] 

Roll hardness - Radial pressing between individual paper layers - Measure of how denseAiard a roll has been wound 

The purpose of reeling is to wind up the continuously produced paper web on reel spools building up paper rolls of up to 4.5 m diameter. The paper rolls have to fit the requirements of any following process steps. These mainly concern the paper roll structure such as hardness and overall shape. As reehng is a discontinuous process economic aspects as regards broke due to roll change/tum-up are important as well. This concerns the so-called top broke at the outside of the finished parent roll and the bottom broke at the inner layers of the spool. 

There are only a few key parameters which influence the hardness of a roll (Fig. 6.74). These are web tension, line force and center torque. As, for example, some paper grades only allow low web tension to avoid breaks at the winder this parameter often cannot be used for optimi2ation of roll hardness. So the main parameter is the line force which usually varies between 1 and 6 kN m. Line force can be applied either by the reel drum or the paper roll. The center torque applied on the reel spool is the third tool to build a good roll structure. There are different reel types combining these parameters in different ways depending on the special requirements of the individual paper grades to be reeled. 

Factor for v= 1200 m min Unit Heavy weight coated paper Light weight coated paper 

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All pipelines will be circulated clean and those that are buried, or on the seabed, left filled with water or cement. Surface piping will normally be cut up and removed. Flexible subsea pipelines may be reeled-in onto a lay barge and disposed of onshore. 

II serait done ainsi facile d obtenir en temps reel sur ordinateur, I image d un defaut standard long qui est a meme de produire la variation d impedanee observee. II serait ainsi possible de realiser le controle par des mesures absolues et d eviter le recours a des defauts etalons. 

Wibaut, J. P. (1915). Reel Trav. chim. Pays-Bas Belg. 34, 241. 

The chapter is an abridged and adapted version of a manuscript originally published in Reel. Trav. Chim. Pays-8as, 100 (1981), 85. 

H. Hommes, H.D. Verkruijsse and L. Brandsma, Reel. Trav. Chim. Pays-Bas,... 

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