AS NZS 1301.453:2016 pdf free
AS NZS 1301.453:2016 pdf free.Methods of test for pulp and paper
When testing the bending resistance in the machine direction or cross direction, the specified direction is perpendicular to the width of the test piece. Avoid folds, creases, visible cracks or other defects in the area to be tested. If watermarks are present in the test area, this shall be noted in the test report. ldentify the sides of the specimens to ensure that an equal number of valid results are obtained with the force applied to each side.
Highly twisted and curled test pieces may give unreliable results. It is not possible to straighten curled or twisted samples without damaging the material.Cut, in each required principal direction (machine direction and/or cross direction), a minimum of ten test pieces having the dimensions (38,0±0,2) mm wide and at least 80 mm long (50 mm bending length).
Set the instrument to a bending angle of 15°. Do not bend or flex the test piece in any way, prior to testing, and do not test any test piece more than once because continued flexing causes a progressive reduction of the bending force, thus causing a reduction of the bending resistance. In order to get a correct bending to a bending angle of 15° (or 7,5°)， make sure that the knife edge is in contact with the surface of the test piece, without applying any force on the test piece prior to the testing.
If the maximum force is obtained before the test piece has been bent through 15°, or a break, kink or crease is observed, the test result should be discarded. If more than 10 % of the test pieces exhibit this behaviour, use a bending angle of 7,5°. If so, the bending angle shall be reported.
When testing, equal numbers of valid results with opposing surfaces towards the direction of deflection shall be obtained. For each principal direction to be tested, a minimum of ten test pieces and ten valid readings are required for a given bending angle. No test piece shall be reused after it has been removed from the instrument clamp.AS NZS 1301.453 pdf free download.
