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Research on improving the basis weight measurement accuracy of tissue paper based on PSO-BP neural network, TAPPI Journal October 2022

ABSTRACT: The near-infrared (NIR) sensor can be used for measuring the basis weight and moisture of tissue paper, but the measurement accuracy is not ideal for this paper grade. The weight range of the tissue is 10~30 g/m2, indicating that it is a low gram weight paper. The temperature and humidity of the production environment significantly impact an NIR sensor. This paper focuses on improving the measurement accuracy of tissue paper basis weight. In order to reduce the influences of temperature and humidity, a mathematical model based on a particle swarm optimization back propagation (PSO-BP) neural network is proposed. In comparison with multiple linear regression measurement models, the basis weight measurement error with the PSO-BP model is within ± 0.5 g/m2. This model can effectively improve the measurement accuracy and has a good effect on overcoming the basis weight nonlinear effect caused by the changes in ambient temperature and humidity.

Nanocellulose•cationic starch• colloidal silica systems for papermaking: Effects on process and paper properties, TAPPI Journal October 2022

ABSTRACT: Laboratory tests were conducted to better understand effects on the papermaking process and handsheets when recycled copy paper furnish was treated with combinations of nanofibrillated cellulose (NFC), cationic starch, colloidal silica, and cationic retention aid (cPAM; cationic polyacrylamide). Dosage-response experiments helped to define conditions leading to favorable processing outcomes, including dewatering rates and the efficiency of fine-particle retention during papermaking. Effects were found to depend on the addition amounts of cationic starch and colloidal silica added to the system. It was shown that the presence of a polymer additive such as cationic starch was essential in order to achieve large strength gains with simultaneous usage of NFC.

The Mechanism of Bonding, TAPPI Journal September 2022

ABSTRACT: Three factors are involved in cellulose bonding--available area, contact, and hydrogen bonding.

SetPoint: The Art of the Future, Paper360º September/October 2022

Over the Wire Summaries, Paper360º September/October 2022

Marking 10 Years of an Industry-Specific First, Paper360º September/October 2022

Breaking Traditional Maintenance & Reliability Thinking, Paper360º September/October 2022

Kotkamills’ PM1 Rebuild Will Reinforce its Position in Laminated Papers, Paper360º September/October 2022

A Closer Look at Tooling, Paper360º September/October 2022

AF&PA Reports Point to Growth in Both Containerboard and Boxboard, Paper360º September/October 2022