A high-volume, high-speed single facer at a corrugated packaging plant located in California (USA) was having issues with poorly bonded board after starting up from a stoppage of any duration. The poor bond between the corrugated medium and liner was resulting in excess waste and lost production.
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Written by Danielle Rohrer
on May 10, 2016.
PT rotary joint with integral protective shield keeps debris out of the sealing area and enhances safety around the rotary joint.
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Written by Danielle Rohrer
on March 29, 2016.
Because energy drives the papermaking process, steam is found in many energy streams in a paper mill. Steam is used to cook fibers for improved sheet strength, heat stock for improved drainage, heat process air for ventilation, heat dryers to dry paper, and selectively heat the web for improved gloss and smoothness.
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Written by Wes Martz
on October 13, 2015.
Dryer fabrics, often called dryer “felts”, are used to hold paper against the outer surfaces of steam-heated drying cylinders. The pressure from the dryer fabrics increases the rate of heat transfer from the dryer to the paper. The pressure that is applied to the paper depends on the fabric tension and the diameter of the dryer. The pressure can be calculated, as a first approximation, by the equation:
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Written by Greg Wedel
on September 16, 2014.
It has been well-documented that the distance between the condensate entrance of a syphon and the dryer shell, referred to as the syphon clearance, has considerable influence on the operational efficiency of a paper dryer. Suboptimal clearance adversely affects heat transfer capacity and the cross-machine temperature uniformity of the cylinder.
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Written by Jerry Timm
on July 09, 2014.
