Towards improved surface sizing

At PTS 2017 CH-Polymers and Chemec proudly presented with BTG Instruments our joint dive into deeper testliner surface sizing process understanding, based on a Master’s thesis work in collaboration with Åbo Akademi (Misla Lagus 2016-2017).

More and more paper is used in packaging. Corrugated board is increasingly recycled based and recycled-based testliners need to have adequate water resistance. Surface sizing is an easy and cost efficient way of doing this, compared to internal sizing. Lack of understanding the surface sizing process variables still causes headache to the manufacturers. In our study different surface sizing agents were used to size base papers from several different sources. Basic paper analyses, surface sizing agent analysis, dynamic water retention (DWR) and Hg-porosimetry were done.  We could find some interesting correlations with starch pickup, surface sizing agent performance and strength improvement in the size press. We could also replicate real on-machine problems in lab-scale, confirming the applicability of our methods.

Our findings:

  • Lab scale surface sizing performance correlates well with production scale performance.
  • Confirmed applicability of our lab scale surface sizing method.
  • DWR measurement can be used to predict starch pick-up in surface sizing.
  • Hg-Porosimetry gave the most accurate porosity determination for the basepapers with distinct surface and internal porosity. Surface porosity seemed to be the main driver for starch pick-up.
  • Parameters affecting most SCT (Short Span Compression Test) strength were:  
  • SCT strength and  porosity of base paper  
  • Applied starch amount
  • The hydrophobic character and smaller particle sizes of the surface sizing agent both improved sizing efficiency.


A study of the interaction between recycled linerboard base paper and surface sizing agent

Kai Dahlskog, Chemec Oy
Misla Lagus, CH-Polymers Oy
Kimmo Huhtala, CH-Polymers Oy
Sheryl Hildén, BTG Instruments AB
Jussi Salonen, BTG Instruments AB


Posted on September 18, 2017 .

Best Paper of Papercon 2017!


Presentation by CH-Polymers and Tampere University of Technology was chosen the best paper of the Papercon 2017 conference, The Coating and Graphic Arts Division, in Minneapolis, Minnesota, USA! 

Lic.Sc.(Tech) Päivi Miettinen and PhD Mia Ahokas from CH-Polymers Oy and M.Sc.(Tech) Sanna Auvinen from Tampere University of Technology (co-authors M.Sc. Jaana Heinonen and M Sc. (Tech) Tom Engström) presented a paper: The Role of Base Substrate in barrier and convertibility properties of Water Based Barrier Coated (WBBC) Paper Board and Paper. 

Send your contact details to to get immediate access to the winning paper! We are happy to tell you more about our solutions for various barrier requirements such as grease, water vapour and mineral oil migration. If you are looking for more sustainable solutions and efficiency in form of repulpable on-line systems, contact us to hear more about our solutions!

Posted on April 27, 2017 .

April was a busy Exhibition month on the European continent

CH-Polymers participated in:

-European Coatings Show in Nuremberg, Germany
-Specialty Papers Europe 2017 in Cologne, Germany
-Filtrex 2017 in Geneva, Switzerland

We want to thank all the customers and partners, current and potential ones, for all your interest and valuable discussions about chemistry, business, value, opportunities and later in the evening  - life itself!  It was our pleasure to meet you all!

Posted on April 26, 2017 .

The show is on the road again, bringing our latest news about barrier technology to the American continent

Meet us at the Papercon 2017 exhibition in Minneapolis, Minnesota, USA!  Lic.Sc.(Tech) Päivi Miettinen will give a presentation about barrier coatings  - hear about the latest findings and how to create a greener future for next generations.  

Read more:

Interested in packaging and barrier solutions? Call us to meet at the next exhibition  #Interpack17!

Posted on April 23, 2017 .

ISO 14001 certificate granted to CH-Polymers

Clean and safe environment is important to all of us not to mention the generations to come. We are pleased to announce that our focus on environment has now resulted in a certified ISO 14001 management system! Systematic focus on improving our environmental footprint has already resulted in several process changes and new recycled or biomaterial containing products have been introduced to the market. With the help of these our customers can be part of increasing material handling efficiency in the value chain. Contact us to find out if you can be part of this development!

Posted on December 28, 2016 .