Twin Folding Tester

Determines the folding resistance of paper acc. to the Schopper principle.

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Twin Folding Tester – Schopper principle

The device measures the number of folds until the sample breaks. The test requires two samples to be tested simultaneously. It is equipped with a touch screen displaying the temperature, the number of folds and statistical values. The heads are equipped with temperature sensors to convey the temperature inside the heads.

 

Test Description

Two samples are clamped in the folding heads for a simultaneous
test. The spring loaded sample supports are pulled apart, so that the
samples are clamped at the specified force. After pushing the start
button, the folding knives begin to guide the sample around the
sapphire supported folding rolls. That way the samples are folded
on both sides at a radius of 0.25mm. If one sample breaks, the
folding process of the second sample continues until it also breaks.
The movement of the folding heads stop after test termination, so
that the samples can be removed. The device records the number
of folds until the sample breaks and displays them on the touch
screen.

 

Technical Specifications

  • Paper thickness up to 0.25mm
  • Easy to use due to touch screen
  • Statistic functions
  • Display of each head temperature
    and the ambient temperature.
  • Spring force:min. 7.55N/max. 9.81N
  • Testing length: 90mm
  • Sample length: 100mm
  • Sample width: 15mm
  • Speed: 115 ±10 strokes/min
  • Stroke: 20mm
  • RS 232 interface for result transfer

 

Standards

  • ISO 5626
  • TAPPI T523
  • NF Q03-062
  • NFISO 5626

 


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