International Starch Institute
Science Park Aarhus, Denmark
Karl Kroyer - Non-Woven
|Kroyer Index|

Re.: http://www.nonwovens-industry.com/jan991.htm :

How Did It Begin?
In what is a very secretive community, it is difficult to determine who did what and when. Historically, the Scandinavian conceptual thinking appears to be ahead the others. Karl Kroyer was always convinced that the invention belongs to him. Yet, it was a Finnish engineer Hejtl’s work in the early ’50s that inspired air laying thoughts of Kroyer. On the other hand, the Japanese were, undoubtedly, the very first to advance the process commercialization and for a long time Honshu made—and arguably is still making—the best air laid around.

All Those Diligent Paper Makers
Karl Kroyer, right from the beginning of his involvement in air laying and for the rest of his life, believed that he had invented a process that, some 2000 years after the original Chinese invention, would make a better paper. Mr. Kroyer was also a skillful promoter and a good number of Europeans as well as North Americans followed that promise.

Likewise, Honshu was, during the decades of air laid pioneering, always a paper company. Did the technology, in its infancy and through the initial growth stage, fall in the wrong hands?

-----------------------------------------------------------------------------------------------------------

http://www.nonwovens-industry.com/jan992.htm

a look at the latest trends and developments

By Colin White MCW Technologies Cumbria, U.K.

Pre-formed absorbent core structures are definitely the subject of the most speculation in the business today. The technology that we prefer to call short fiber air laid to distinguish it from the staple fiber air laid webs made by the Rando Weber process, is based on the technology originally developed by Karl Kroyer in Denmark. It was originally conceived as a way to make paper without the use of water!

In more recent times, the earlier work by M&J Fibertech and DanWebforming, both also located in Denmark, has resulted in “turn-key” machine systems that allow the production of multilayer webs based on cellulose fluff pulp, synthetic fibers or mixtures.

The main limitation is that the fiber length must usually be shorter than 12 mm, but this is not vitally significant for the production of absorbent products. The formed webs may be thermally bonded, latex emulsion bonded or both systems may be used.

The layers of the formed web may be interleaved with pre-formed webs from different technology bases, i.e. spunbonded or SMS and granular superabsorbents or fibrous superabsorbents may be laid down as a layer or throughout the fiber layer.

It would appear that using this technology, with the ability to make use of the whole range of cellulose fibers available as fluff pulp and combined with pre-formed insert webs to provide, for example, a specially formed bicomponent acquisition layer or to incorporate a precisely located, thin layer of superabsorbent fibers, will enable the complex webs required for our future diaper products to be made in a controlled and reproducible way.

--------------------------------------

http://www.brandenburg.de/land/mdje-europa/briefe/eb9812/eb9812.htm

Ziel der Investition ist es, eine der modernsten Airlaid-Nonwoven Produktions- und Vertriebsstätten in Deutschland zu etablieren. In der Papierindustrie wird Papier durch Umwandlung von Zellulose oder recycelten Fasern in gemahlene Wet-Laid- oder Air-Laid-Mutterrollen hergestellt, welches sofort verarbeitet oder weiter veräußert wird. Die Produzenten schneiden, falten und splitten die Fasern der Mutterrollen, um Endprodukte herzustellen, welche aufgerollt, verpackt und gehandelt werden. Concert praktiziert ausschließlich den Prozeß des Air-Laying, bei dem die Fasern durch Luft transportiert und zu einer besonderen Form von Fasergewebe ohne Wasserverwendung zusammengelegt werden. Durch klebende Bindemittel wird danach die Weichheit und Feuchtigkeitsbeständigkeit hergestellt. Das Verfahren wurde durch den dänischen Erfinder Karl Kroyer 1995 patentiert und von Concert Ltd. Vancouver/Kanada angewendet. Das Verfahren gilt als innovatives Faserformsystem, welches die Air-Laid-Industrie verändert hat.

Read Disclaimer notice. Copyright © 2001. 
All rights reserved. International Starch Institute, Science Park Aarhus, Denmark.

Keywords:starch,glucose,karl,kroyer,inventor