Silicon Release and Glassine
Advances in technology demand higher quality limits and manufacturing efficiency
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The reel must allow additional torque to compensate for paper expansion resulting from adding moisture to the sheet. Core chucks and spools must be interchangeable for the supercalender and the paper machine. Moisture gauges must be installed upstream and downstream of the remoisturizing system. The most critical component is the remoisturizing system. To function correctly it must be able to apply water both to the top and the underside of the sheet. It must have the capacity to add up to 15% moisture to the sheet. The spraying technology must include Particle Size Management (PSM) to ensure uniform spray application and efficient absorption into the sheet. The remoisturizer must have a moisture extraction system to draw off excess over spray and provide a stable sheet run. A heated hood enclosure must be provided to contain and evaporate moisture-laden air, which can collect and drip from machine components. Control strategies must ensure that a uniform moisture film is applied to both sides of the sheet with controls for both machine direction and cross direction. |
The control system must be able to ensure an even, balanced application of water to both sides of the sheet. And most importantly, the system must be functional and available 100% of the time. The engineering challenges presented to system designers to meet the technical specifications of product application and product reliability are extreme. Construction materials, spray nozzle technology, process control expertise, environmental containment, and papermaking expertise must all be blended together to meet the rigid demands of product application. Today, advances in paper-machine and paper-finishing technologies make it possible to produce ever more new and enhanced grades of quality paper. It is down to manufacturers to design and supply better technology for actuators and process-control systems. By eliminating steps in the paper-making process that have traditionally been off-line to on-line processes and simultaneously improving quality and efficiency, today's paper manufactures have a better chance in the global market. Page |
