Rita T.,Central Pulp and Paper Research Institute CPPRI |
Dev N.S.,Central Pulp and Paper Research Institute CPPRI |
Kumar G.P.,Central Pulp and Paper Research Institute CPPRI |
Arvind K.,Central Pulp and Paper Research Institute CPPRI |
Mathur R.M.,Central Pulp and Paper Research Institute CPPRI
IPPTA: Quarterly Journal of Indian Pulp and Paper Technical Association | Year: 2013
Recovered paper is an important fiber source for Indian Paper Industry. However often Recycling efficiencies are intimidated by the presence of contaminants particularly the adhesives which paper consumers such as printers and publishers introduce through their use of ink binders, labels, book bindings, hot melt coatings etc. These adhesive materials are liable to form stickies during recycling that can lead to several problems such as deposits on paper machine, fabrics, breaks on the paper machine as well as specks and holes on the paper sheet. A major impediment to the control of stickies in the papermaking system is the inability to effectively quantifying the concentration of adhesive contaminants in the raw material. However, one way to understand the stickies concentration in a specific system is to measure the stickies level from pulper to machine using a stickies profiling procedure. Quantification of stickies during processing of RCF is therefore pre-requisite before a control/ removal strategy is adopted. Lot of work has been done in different laboratory across the world on quantification of stickies based on their size, shape and physical character employing combination of techniques but till date no standard method has been developed. CPPRI being an R&D organization has also developed a protocol of methods integrating different techniques to quantify the Macro, Micro and Colloidal stickies concentration in RCF stock. Based on this methodology, CPPRI conducted stickies audit in different mills. The present paper highlights the findings of stickies audit conducted in these mills which has helped the mills In understanding the performance of control strategies adopted in their mills.