Nanotechnology in Practice: Improving Machine Performance in a Newsprint Mill, 2003 Spring Technical Conference Proceedings

The use of microparticle retention systems has become increasingly important in the past decade. Microparticle systems tend to give better retention, drainage, and formation than do conventional polymer retention systems. The small, tight flocs, which form with the aid of microparticle retention aids and adsorb strongly to the fiber furnish components, create a more open and uniform sheet structure in paper. Since their introduction a number of years ago, microparticle systems have consisted mostly of two types, silica - cationic starch based, or bentonite - polyacrylamide based. In the last few years, a number of other competing technologies have been developed and used successfully.

Papermakers have continued to seek more advanced technology that would allow them to meet stringent requirements for formation and opacity in lightweight fine paper grades as well as superior retention of fillers and fines. For heavier weight grades of paper and paperboard, increased or high response drainage is often key to keeping up consistent machine speeds without sacrificing paper and paperboard properties.

This paper will present a newsprint case study using an engineered colloidal technology. We will present the benefits associated with the use of this technology. Areas discussed will be wet-end chemistry, on-line first pass retention control, process stability, and impact on paper quality.

Author: Covarrubias, R. M., Kessler, B., Magee, K.
Nanotechnology in Practice: Improving Machine Performance in
Nanotechnology in Practice: Improving Machine Performance in a Newsprint Mill, 2003 Spring Technical Conference Proceedings

New Releases


Kraft Recovery Boilers, Third Edition  

Sponsored by the Recovery Boiler Program R&D Subcommittee of the American Forest & Paper Association (AF&PA) and published by TAPPI Press.



Handbook For Pulp and Paper Technologists (The SMOOK Book), Fourth Edition

The best-selling text to introduce the entire technology of pulp and paper manufacture.



Guidelines for Safe Assessment and Operation of Yankee Dryers  

A project of the Yankee Dryer Safety & Reliability Committee.



Check our newest additions.

TAPPI Press offers some of the most in-depth resources and references for the forest products and related industries. 

See More


Available for Purchase – Conference Proceedings

TAPPI maintains a record of key conference papers, presentations, and other conference publications, available for purchase in a variety of formats.

See More