Welcome to selected copies of our publications

This TAPPI Journal paper discusses fundamental aspects of conductivity and examples of its impact on papermaking process. 

APPITA Journal paper with laboratory work for several different retention programs and various sources of conductive ions

This pap published in APPITA Journal discussed sources, impact, and ways to manage anionic trash in mechanical grades of paper. Enzymatic control with Pectinase is also included.

My experiences in the application of HYP in other furnishes are discussed. The focus is placed on the negative impacts and their management. 

Fundamentals, expectations, challenges, and solutions to the neutral conversions in mechanical grades are discussed by authors of this Pulp and Paper Canada publication. 

Difficult water chemistry conditions and poor quality fiber favor amphoteric dru strength agents. Less erosion of the available surface anionic charge on the fiber improves retention and higher product loading. Synergy with cationic GPAM products allows amphoteric products to boost the performance of the existing strength program on the machine. 

Closed water circuits in the mill and poor quality fiber drove the Asian market to use, almost exclusively, amphoteric dry-strength products. Is this trend happening in North America? This paper discusses the chemistry, impact of water chemistry, and practical applications of Polystron dry-strength technology from Arakawa. With its optimized molecular weight and molecular weight distribution, ratio of cationic and anionic charges, and blocky charge distribution, Polystron is a truly unique technology. The synergy with cationic GPAM products was also established, making introducing this technology easy and low-risk. 

 Application of AI-based Approach to  Control Papermaking Process 

Review of the factors affecting filler retention in the highly filled mechanical grades. Paper grades such as SCA and SCA+ utilize hydrogen peroxide bleaching and operate at high conductivity level and high anionic trash loading. Reaching the required levels of FPAR under these conditions becomes very challenging and expensive. The benefits of the thickening press after the bleaching were discussed. The application of the online retention control further improved the runnability of the paper machine and product quality. Additionally, the benefits of the application of pre-treatment of the filler with the coagulant before addition to the fiber furnish was discussed in this paper. 

Review of the techniques of measurement of cationic demand. Discussion of the cationic demand surveys in production system of different paper grades. 

Problems and solutions in retention, mainly filler retention are discussed in this TAPPI Confrence presentation