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Monday, January 21, 2013

Why Measure Roll Hardness?

  • When a runnability issue is reported by a converter or a printer, a number of actions are generally taken by the manufacturer to identify root causes of the issue
  • The examination of Cross Direction (CD) and Machine Direction (MD) profiles of key properties, such as grammage, caliper and density
  • Offline measurements are typically very accurate but are time consuming; online measurements are not accurate enough
  • The advantage of systematic reel hardness measurement is that it can be carried out quickly and it has the potential to identify problematic reels 
Technidyne offers Tapio RQP (Roll Quality Profiler) to the North American Market

Benefits of Tapio RQP

  • Roll hardness measurement has been widely used in the paper industry
  • Traditionally, hardness across the reels is gauged either manually by beating the surface with a wooden stick and listening sound or by using a hammer type device
  • Measurement techniques and instruments that were employed were at times inferior or did not provide a sufficient resolution to recreate the hardness profile across the reel to conduct a proper analysis
  • The test data collected from these measurements have not been clearly linked up with other paper properties to diagnose the root cause
  • Also being a subjective measure, the evaluation is heavily dependent upon operator’s experience
  • Tapio RQP is the first hardness measurement device designed for fast, accurate and operator independent measurement of paper roll, plastic film roll or machine roll true hardness profile
  • Tapio RQP is the fastest and the most accurate system to detect reels that need to be excluded in printing or converting processes.
See the video on How a Roll Hardness Measurement is Made with the Tapio RQP

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