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John Cameron, William Forester--The recyclability of paper contaminated with pressure sensitive adhesives was evaluated using Western Michigan University s state-of-the-art recycling and deinking facility. The process flow system in the recycling and deinking facility was arranged based on the USPS protocol and collected samples were evaluated also based on the USPS protocol. Two experimental adhesives were evaluated in these trials. One of these adhesives formed significantly larger particles, which were more readily removed. Of the separation processes used in this trial, screening was shown to be the most effective in removing these larger particles. One of the conclusions from this study is that the ability of the adhesive to form larger particles greatly enhances its removal from the recycle stream. Final dirt counts of about 10 ppm were achieved with the pulp containing the larger particles.
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Behavior of Psas: MOW and Sorted Office Paper with High Content of PSAs, 2000 Recycling Symposium Pr