Colloidal Organic Content and Tackiness of Coated Broke and Recycle Fiber, 2012 TAPPI PEERS Conference

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The consistency, temperature and duration of repulping of coated broke and recycle fiber can determine the amount of colloidal organics liberated and the tackiness. In this study old magazine, old newsprint, coated paper, envelopes, post-it notes and office paper are repulped at differing consistency, temperature and duration. The colloidal and dissolved organic content was measured along with the tackiness of each pulping condition to better understand the stickies and white pitch released.

Using the understanding gained of released colloidal stickies and colloidal white pitch during repulping treatment by means of fixative, stabilizer and detackifier was examined to determine best means of control. This information can then be used to help reduce issues with deposits and runnability issues at the paper machine.