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Effects of orders of addition in nanocellulose•cationic starch• colloidal silica systems for papermaking, TAPPI Journal October 2022

ABSTRACT: Two orders of addition were compared when preparing paper handsheets from recycled copy paper furnish in combination with nanofibrillated cellulose (NFC), cationic starch, colloidal silica, and cationic retention aid (cPAM; cationic polyacrylamide). Faster dewatering and higher fine-particle retention were obtained at equal optimized dosages of additives when the colloidal silica was added last, after addition of the cPAM. The same order of addition also provided a higher gain in the paper’s tensile strength. However, higher paper stiffness was achieved when the colloidal silica was instead added to the NFC, after its pretreatment with cationic starch. Results were consistent with the principle that papermaking additives added shortly before sheetforming tend to have the largest effects on drainage and retention. The results also demonstrated a sensitivity to the relative dosages of positively and negatively charged additives.

Journal articles
Open Access
Infrared Microspectroscopy: Analysis of Multilayer Films, Co

Infrared Microspectroscopy: Analysis of Multilayer Films, Contaminants and Inclusions, 1990 Polymers, Laminations & Coatings Conference Proceedings

Journal articles
Open Access
Characterizing Hot-Tack Differences in Hot-Melt Adhesives Us

Characterizing Hot-Tack Differences in Hot-Melt Adhesives Using DMTA, 1991 Polymers, Laminations & Coatings Conference Proceedings

Journal articles
Open Access
Historical and Recent Attempts to Solve the Uneven Microwave

Historical and Recent Attempts to Solve the Uneven Microwave Heating Problem with Packaging, 1991 Polymers, Laminations & Coatings Conference Proceedings

Journal articles
Open Access
In-Line Shear Viscosity Measurements for the Gear Pump Assis

In-Line Shear Viscosity Measurements for the Gear Pump Assisted Extrusion Process, 1992 Polymers, Laminations & Coatings Conference Proceedings

Journal articles
Open Access
Artificial Intelligence for Supervisory Control and Operator

Artificial Intelligence for Supervisory Control and Operator Decision Support, 1992 Process Control, Electrical & Info. Conference Proceedings

Journal articles
Open Access
Out-of-Plane Ultrasonic Testing of Paper Materials Using Flu

Out-of-Plane Ultrasonic Testing of Paper Materials Using Fluid-Filled Rubber Wheels, 1993 Process & Product Quality Conference Proceedings

Journal articles
Open Access
Pulp Grinding - A New Method for Producing Mechanical Pulp,

Pulp Grinding - A New Method for Producing Mechanical Pulp, 1990 Pulping Conference Proceedings

Journal articles
Open Access
Improving Softwood Mechanical Pulp Properties with Ophiostom

Improving Softwood Mechanical Pulp Properties with Ophiostoma Piliferum, 1995 Pulping Conference Proceedings

Journal articles
Open Access
The Impact of the Summer Effect on Ink Detachment and Remova

The Impact of the Summer Effect on Ink Detachment and Removal

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