AS NZS 1301.434:2016 pdf free
AS NZS 1301.434:2016 pdf free.Methods of test for pulp and paper
One roll is motor-driven at 4,5 r/min±1,0 r/min and the rolls are held in mesh by a force of 100 N±10 N exerted between the rolls and distributed evenly across the teeth, under test conditions. In some instruments,the force between the rolls is applied by a spring acting in a slide. In such instruments, friction in this device can result in the force which acts upon the test piece being considerably less than the force required to displace the rolls initially. When verifying that an instrument conforms to the requirements given in this subclause, it is therefore necessary to measure the force required to just prevent the undriven roll from moving towards the driven roll, from a position about 200 μm away.
If the flat crush resistance index is required, determine the grammage of the conditioned specimens (before the preparation of test pieces) as described in ISo 536.
Cut at least 10 test pieces having a width of 12,7 mm±0,1 mm and a length between 150 mm and 160 mm, the length being cut in the machine direction. Care should be taken not to damage the edges of the test pieces and they should not be handled more than is necessary.
A test piece width of 15,0 mm±0,1 mm may be used, provided that the corrugating roll width is greater than the test piece width. If a test width of 15 mm is used, the force between the corrugating rolls, as defined in 5.2,is to be adjusted to 118N±10N. The use of a 15 mm test piece width is not to be considered as being in accordance with this International Standard and its use is to be stated in the test report.
If the test is to be carried out after reconditioning, the composite test piece (i.e. the fluted test piece attached to the adhesive tape) shall be reconditioned for 30 min to 35 min in the conditioning atmosphere used to condition the samples (see Clause 7). If the test is carried out on reconditioned samples, all of the composite test pieces may be formed prior to testing.AS NZS 1301.434 pdf free download.
