Beskrivning
Bending Resistance Tester
A complex method easily performed
Bending resistance in paper and board is a complex property depending upon the network characteristics of the sheets as well as the fundamental fibre properties to which it relates. It varies with the type of paper, the fibres used, the making process and the bulk and grammage of finished sheet. The two main criteria which govern stiffness are fibre dimensions and bulk. Rigidity has been found to be linearly proportional to the square root of thickness for a given grammage.
Since the bulk density of a sheet is closely related to the degree of bonding and fibre strength, a change in any of the fundamental fibre properties will affect bending resistance. After configuring test conditions, the test can start immediately.
Test description
By pressing the “Start”, button the sample is moved automatically.
The sample-holder now moves to the preselected angle-position
and the curve with the determined values are indicated on the
large touch screen The test will be started automatically as soon
the load-cell is touching the sample (pre-load selectable). With the
holding function, a holding time can be selected and then a second
measurement can be taken. The holding times is very useful for
testing label-paper, when the bending-resistance on wet samples
should be tested. After the test has been done the sample holder
returns to its starting position and the sample can be taken out.
By means of the statistic function, the statistic values can be read
(maximum, minimum, average, standard, deviation,
ratio MC/CD,.. ) on the graphic display.
Specifications
- Universal equipment for paper applications.
Measurement of paper and paperboard. - Manual sample clamping or Pneumatic sample
Clamping. Must be spicified in the order. - Large graphic touch screen.
- Clear acrylic security cover.
- Verification kit included (Weight + Support).
- Sample template 38×80 mm included.
- Bending resistance, bending resistance index results.
- Fatigue. Strength of split, Split recovery.
- Creaseability Test : BS, Slop, B. Moment, etc.
- Taber Measurement Units.
- Test length from 0,1 to 50 mm.
- Test speed from 0,1 to 50º/s.
- Pre-settable bending angle (0.1 to 90 degrees).
- 2 times of test and 2 points of measurement angles.
- Load cell 10N- Range 0 -10000mN- Accruracy ±2% (up
to 100 mN) and ±5% rest of range.
Technical specifications
- Dimensions: 270 x 500 x 270mm (W x D x H)
- Net weight: 15 kg
Standards
- ISO 2493
- SCAN P29
- DIN 53121
- BS 3748
- TAPPI T556
- NFQ 03048
- IS 3748
