BS ISO 24334:2019 pdf free
BS ISO 24334:2019 pdf free.Laminate floor coverings一Determination of locking strength for mechanically assembled panels
Sample five panels, preferably from the same package, for the preparation of five test specimens for the short side locks and five for the long side locks (if panel dimensions allow it, the sampling of the short side and the long side may come from the same panel).
The panels from which the test specimens are cut shall be conditioned to a constant mass at (50±5) % relative humidity (RH) and (23 ±2) °C.
Constant mass is considered to be reached when the results of two successive weighing operations,carried out at an interval of 24 h, do not differ by more than 0,1 % of the mass of the panels.
Cut two pieces, A1 and B1, from each panel. The length of the specimen shall be a minimum of 110 mm (to fit the machine).
If the width of the panel is equal to or less than 210 mm, the actual width shall be used in the specimen (Figure 1).
If the width of the panel is less than 100 mm, the long-side-profiles of two panels shall be glued together.The new actual width shall be used in the specimen (Figure 2).
If the width of the panel is more than 210 mm, the specimen has to be cut down to a width of (200±10) mm (Figure3).
For the short side testing, first attach the clamp to A1 (in attachment area F1). When attaching the clamp to B1 (attachment area F2), ensure that there is no added stretch or pull. Therefore, the tensile-testing-machine has to have a zero-force adjustment control software installed to avoid the additional force resulting from clamping the specimen.
If the width of the specimen is smaller than 210 mm, attach the specimen in the vertical centreline of the gripper perpendicular to the attachment areas, no more than 200 mm apart.
Adjust the external extensometer (or optical measurement) in the vertical centreline of the test specimen as close as possible to the joint.BS ISO 24334 pdf free download.
