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Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
Fax: (608) 231-9592


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Fiber and Chemical Sciences Research

Project Title :  Recycle and deinking of waste paper
Project Number : FPL-4709-4A
Start Date : 08-24-2007
End Date : 08-23-2012

View the 12 publications associated with this project.

Alan W. RudiePrincipal Investigator:
Alan W. Rudie

Non Technical Summary
The US paper industry has made a major effort to recover and recycle waste paper into new paper products. Contained within this waste stream are polymers and plastics that are paper of the original paper products, or mixed with the recovered paper due to inefficient waste separation systems. These materials need to be separated effectively in the recycle mills or they reduce the value of the recovered paper pulp and contribute to operating problems in the recycled paper mill. The RWU tests materials used in paper manufacture to determine their compatibility with recycle processes and evaluate methods to improve the quality of recycled paper fibers.

Objectives Summary
Develop methods to measure and remove adhesives and other polymers that contribute tot he debris stream known as stickies and micro-stickies in paper recycle. Develop methods to improve the separation of wood fibers and ink particles in deinking. Test methods to improve quality and performance of recycled paper fibers.

Approach Summary
Evaluate new adhesives that behave well in recycle and minimize the formation of small particles that contribute to the stickies problem. Test the properties and behavior of stickies and other recycle debris particles to improve current understanding and to provide improved test methods. Evaluate swelling chemicals and mechanical treatments to soften fibers and improve the surface characteristics hydrogen in paper.

Publications associated with this Project

Publication YearTitleDate Posted
2007A New Approach to Measurement of Effective Residual Ink Concentration of Deinked Papers11/20/09
2012Blister contact test for Characterizing Pressure Sensitive Adhesives Coated on thin Sheets09/27/12
2008Characterizing the Distribution of Nonylphenol Ethoxylate Surfactants in Water-Based Pressure-Sensitive Adhesive Films using Atomic-Force and Confocal Raman Microscopy02/09/10
2008Design Criteria for Recycling Compatible Pressure-Sensitive Products11/20/09
2008Effect of Amphiphilic additives on the Behavior of Water-Based acrylic Pressure-Sensitive Adhesives during Paper Recycling10/15/10
2011Effect of Inorganic Fillers in Paper on the Adhesion of Pressure-Sensitive Adhesives11/25/11
2009Modifications of Surfactant Distributions and Surface Morphologies in Latex Films Due to Moisture Exposure05/17/10
2011On Quantification of Residual Ink Content and Deinking Efficiency in Recycling of Mixed Office Waste Paper06/10/11
2007Properties of Water-Based Acrylic Pressure Sensitive Adhesive Films in Aqueous Environments11/20/09
2012Recycling Pressure-Sensitive Products11/15/12
2009Sulfonated Amphiphilic Block Copolymers: Synthesis, Self-Assembly in Water, and Application as Stabilizer in Emulsion Polymerization05/17/10
2008Validation of laboratory-scale recycling test method of paper PSA label products10/15/10

Project Summaries last modified: 06-22-2011