Versatile Leeb hardness tester for on-site testing of large rolls, thin foils, and films
Applications:
Large and midsize paper rolls / Thin film rolls / Foil rolls / Leather / Textile rolls (organic or synthetic) / Coated rolls / Electrical condensers
Large crown for a safe and stable impact for fast and reliable hardness testing of paper, film, foil, textile, cardboard, and leather rolls
Standards
Roll hardness is a roll feature that indicates the equality of the thickness profile and tension in a roll. In most cases, a relationship exists between the roll hardness and roll density. The higher the hardness value of...
Roll hardness is a roll feature that indicates the equality of the thickness profile and tension in a roll. In most cases, a relationship exists between the roll hardness and roll density. The higher the hardness value of a roll, the denser it is. Roll hardness measurements are widely used in the paper and plastic industries. Roll tightness and roll hardness terms are commonly used interchangeably in the paper industry.
Almost any material that must be wound into a roll can be controlled and measured for roll hardness.
In contrast to the thickness profile mesaurement, which measures the one wrap of the film only, the thickness equality obtained from measuring the roll hardness profile takes into account many thousands of wraps. Winding cannot make paper better, but in many cases the product quality can be much lower after winding, hence the correct control of roll profile hardness is one of the most important roll parameters.
The control of roll hardness enables the users to early spot the defects that appear during the roll winding process. The winding is also one of the last processes during the paper and roll making. Hence the highest cost...
The control of roll hardness enables the users to early spot the defects that appear during the roll winding process. The winding is also one of the last processes during the paper and roll making. Hence the highest cost of the broke papermaking process is at the end. All faults should be corrected where they first appear (in the process phase and position). It is never possible to totally compensate earlier fault with later correction.
Important take-home message:
Winding cannot make paper better, but in many cases product quality can be much lower after winding, hence control of the optimal hardness that match specific material and machine are of great importance for high quality and minimalization of material wastes.
Roll hardness profile is an important property of parent reels and customer rolls. A correct winding process can be monitored throughout a roll hardness profile measurement and leads to a roll of a high quality
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Proceq is now part of Screening Eagle Technologies. Screening Eagle is a merger of Dreamlab, a Singapore-based software and robotics company and Proceq, a Swiss-based NDT company with a 65+ year heritage as a market leader in portable sensors. Together, we protect the built world with software, sensors and data.
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