Effect of Pulper Consistency on Stickies Size Distribution, 2016 Pulping, Engineering, Environmental, Recycling, Sustainability (PEERS) Conference Proceedings

Pulper consistency affects production capacity, defibering efficiency, and ink and stickies particle size distribution. The effect of pulper consistency on stickies size distribution, though important, has not been studied in detail. In this project, PSA containing furnish was pulped in laboratory at 5%, 10% and 15% consistency. Results show that 15% consistency pulp produced many more small sized stickies compared to pulps produced at 5% and 10% consistency. This is contrary to generally accepted hypothesis and needs further investigation.

Calcium carbonate, usually present in varying proportion in many recovered paper grades, is known to have some pacifying effect on stickies. A new pacifying agent prepared from silicone release liner, called desiliconized pulp (DSP), behaves like bleached virgin hardwood kraft pulp, seems to have pacifying effect similar to that of carbonate.

Thus, DSP may potentially replace small amount of bleached virgin hardwood kraft pulp with bonus stickies pacifying effect. 

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