Biobond. Improving the Sustainability of Paper℠ program
The use of recovered fiber in the paper industry to meet increasing consumer demand for packaging has been an economic and environmental necessity for decades. Although this satisfies demand, mills making paperboard from recycled fiber must deal with poor bonding performance, system contamination issues, lower yields and particularly reduced paper strength. A common response to compensate for strength loss is to apply more surface starch in the papermaking process. This increases the amount of starch in the final board and in the resulting recycled furnish used to make new paperboard. Incoming recycled furnish typically contains 5 percent starch.
As the cost of starch is typically three times that of fiber, the starch present in recycled furnish is the most valuable component. Until now, it has been impossible to recycle this valuable additive with the fiber, as the starch immediately degrades, dissolves and finally leaves the paper mill through the effluent stream. This dissolved starch also wreaks havoc throughout the papermaking system, spiking microbial activity,
reducing pH, increasing conductivity, interfering with additive performance, reducing strength and increasing effluent chemical oxygen demand (COD) levels.
Now, with Ashland’s introduction of the Biobond
program, the game has changed completely. This patented approach ensures that the majority of incoming starch is preserved, reused and recycled, leaving the paper mill as it should – with the paper. This valuable raw material can now be reused, significantly reducing input costs in paper production. Further, all of the negatives associated with dissolved starch in the system are eliminated, improving runnability, operational efficiency, and paper quality.
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Working in concert with Spectrum™ XD3899 microbiocide and a traditional organic biocide for amylase control; the Biobond program prevents the degradation of incoming starch.
• Improved system cleanliness
• Fewer breaks
• Reduced downtime for clean
• Improved runnability
• Increased production
Most paper mills apply fresh starch to increase the strength of recycled fibers, even though starch from the original manufacturing process is present in the furnish. The Biobond program enables a mill to reclaim the majority of the starch.
• Reduced wet end starch usage
• Reduced surface starch usage
• Elimination of dry strength resins
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Documented BenefitsTestliner and fluting production applications
Commercial applications of the Biobond program provide documented benefits, including:
– Reduced COD
Without the Biobond program: whitewater chest walls show high levels of deposition
With the Biobond program: whitewater chest
walls are clean with no deposition