January 29, 2009

DRYAD Group announce results from the latest high speed pilot tests in Finland run during November 17 – 21, 2008.

Our sizing concept is simple, we just add our low space requirement spray units to a size press before the nip. We then add any desired amount of high solids starch for the sizing effect and finish the quality using the pressure pulse from the size press.

We are happy to report that these latest pilot tests to size board grade papers have been a great success. The results confirm that we can put a film press quality starch layer on paper surface at desired starch loading level. We also have tools to control the CD profile of this starch layer as desired.

The latest tests were run using two layer untreated testliner as base paper. Some client specific tests were also performed with successful results. We met and exceed the paper quality requirements on the markets and can now offer a process that will use previously unattainable high starch solids in sizing.

We could not detect any deterioration in paper quality with increasing solids i.e. we know now that we can go even higher.

Our process makes easy and inexpensive retrofit opportunities for all those with a size press already in place.

It can reduce the use of wet end starch – and perhaps in some cases we are able to eliminate it. It is also conceivable that we might be able to create superior quality layered papers by using spray units between the layers in the forming section whenever the available space allows it.

We can now offer an economically highly attractive sizing process for testliner manufacturing. We see no limits related to any other paper and board grades but with to start the commercialization the waste paper based testliner seemed a perfect fit for multiple reasons.

Follow the link to see the two examples to installing our patented system to the size press area:

Dryadtechnoloy, Inc.

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2 Responses to “”

  1. Paul Chappell Says:

    I work in Sydney Australia for Amcor in a paper mill making 270,000 metric tonnes of corrugating medium and test liners on 2 paper machines that are 1960’s technology with standard pond size presses. On one of the machines we are trying to develop a heavier weight grade with better strength. This is currently single sided starch application via a pond size press. We have been trying to improve Scott Plybond and Ring Crush by in house spraying of starch at the size press onto the back side of the sheet. What we are doing is agricultural at best and was looking at commercially doing this. Do you have any commercial applications of your technology operating anywhere? Do you sell these prototype units yet? Have you got any further trials underway?

    Any information would be great.

    Best Regards,

    Paul

  2. dryadtechnology Says:

    Thank you Paul. Our first “pre-commercial” unit goes online on board grades this month in Europe. We have had excellent results from several pilot runs in Finland covering different products and do not expect the results from this first online operation to be any different. In these tests on the pilot we have sprayed starch around 25%-27% solids. This high solids alone pays for the investment in saved energy compared to the current film and pond presses. The press rolls after spraying are essential to get the starch where it is needed. We can add starch profiling and perhaps even moisture profiling into the same spray unit, or run it only with a very simple control system. Retrofitting old machines with existing size presses are ideal as the press component is already there. We expect added benefits in both ends of the basis weight scale and perhaps even a new board group of “ultra” light basis weights will emerge.


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