Juergen Belle

BellePapier GmbH

Ein guter Projekteinstieg ist in der Regel eine Systemanalyse. Diese wird am günstigsten mit einer Materialflusskostenanalyse (MFCA) verbunden, weil dadurch nicht nur die Massenströme sondern auch die Kostenströme des Prozesses abgebildet werden können, die in der Standard-Kostenrechnung bislang nicht erfasst werden. Sankey-Diagramme des Prozes-ses...

There is still an on-going discussion about current theories regarding fiber-fiber bonds at dryness below 60%. The goal of this paper is to show the impact of refining on the initial wet web strength (IWWS) and to reveal the role of macro fibrils in wet webs for strength development. The study was carried out with laboratory hand sheets, made of co...

Despite much research into and development within the complex area of the initial wet web strength of paper, no complete model has yet been developed to describe this property. This type of paper strength is the most important property to ensure an effective paper machine run. Furthermore, the process of strength development in the sheet forming an...

Various models exist that explain strength development in the wet web. Furthermore the scanning electron microscope (SEM) has been used in the paper industry to characterise cellulosic fibres and paper. The documentation of the initial wet web properties needs very specific requirements for sample preparation. An SEM image shows the sample's surfac...

Various models exist that explain strength development in the wet web. Furthermore the scanning electron microscope (SEM) has been used in the paper industry to characterise cellulosic fibres and paper. The documentation of the initial wet web properties needs very specific requirements for sample preparation. An SEM image shows the sample´s surfac...

The wet web strength is one of the most important parameters for effective paper machine performance. A huge variety of parameters is known from many studies to have an impact on the wet web strength (WWS). In this study, a full factorial design of experiments (DOE) was used to determine the effect of different factors on the WWS. The goal was to u...

This work has shown that a reproducible ASA emulsification with optimal particle size is possible, and well controllable, in the laboratory. The most important factors for the adjustment of particle size are emulsification time, shear forces, ASA concentration and temperature. The protection colloid and the emulsifier used are also important factor...

Retention and dewatering belong to the central processes of papermaking. They are affected by many factors, such as additives, process temperatures, shear forces and times of contact with chemicals. A detailed laboratory analysis of all relevant parameters is indispensable in optimizing retention and drainage and thus improving both the papermaking...

Because of the complex interactions involved in resin sizing, there are still no mathematical algorithms available to adequately describe the process, even though its basic mechanisms are fully understood. Papermakers continue to rely on their vast experience or trial and error procedures to control one of the papermaking operations that determines...

A generic method for formulating pulp and paper optimization problems is presented. Two ongoing projects in the framework of the DOTS project illustrate the method: optimization of sizing quality at a specialty paper mill, and optimization of the water and broke systems at a coated paper mill. Explicit and implicit formulations are compared, and di...

Paper is in contact with different waterbased liquids e.g. coating colours, inkjet inks, glues, printing inks and printing additives during finishing and other processes. There have been several publications on the subject There are a number of methods that measure and evaluate paper that is in contact with water or at different humidity. Measuring...