BS EN 530:2010 pdf download

BS EN 530:2010 pdf download.Abrasion resistance of protective clothing material一 Test method.
5.6 Magnifying glass or microscope
Magnifying glass or slereo microscope, e.g., 8x magnification.
5.7 Useful life of auxiliary materials
Renew the ebradant for every test. For abrasion tests with more than 50 000 rubs, change the abradant after every 50 000 rubs.
Inspect the felt for soiling and wear after every abrasion test. If soiling or detectable wear shows visible or touchable change (e.g. pilling) in the surface of the felt, replace the felt
When foam is used in abrasion testing, use a new piece for every abrasion test
6 Procedure of Method 1: Determination of abrasion resistance
6.1 Test specimen
Using the punch or press cutter, take at least four pieces for test specimens. Exclude the selvedge area at least 100 mm from the edge wtien cutting the specimens at random from the entire matenal. For woven fabrics, take the specimens so that they each contain different warp and waft threads. Specimens shall not include seams.
If the end point of the test is expressed in terms of mass loss, determine the mass of each speomen taken, to an accuracy of 1 mg before the test starts.
6.2 Setting up the machine
6.2.1 MountIng specimen In test piece holder
Place the ring of the test piece holder in position on the mounting plate provided on the base of the machine. Insert the specimen face side downwards, centrally on the ring. Place the foam backing on top. Foam shall not be used for test specimens with a mass per isid area of more than 500 gi’m2.
Place the metal insert carefully and centrally on top of the specimen or on top of the foam arid specimen, so that its hollowed side faces upwards, and press down.
Ensure that the specimen is retained in a wTinkle-free condition during the further assembly with the test piece holder.
NOTE When screws are see lot this assembly, the tolowing procedure should be followed:
Hold the flng containing the specimen and the metal msert fIrmly in the mounting plate, start to screw the top of the test piece holder on to the flng, taking care that the screw threads are not crossed. Having started the screwing down operation, use both hands to maintain a continuous downward pressure on the assembly, against the mounting plate.
6.2.2 Mounting the woven wool fabric abradant on abrading table
Cut circular pieces with a diameter of (140± 5) mm of abradant to fit the abrading table and cut the same number and size of felt backings. Use a new abradant on the abrasion tables.
Place the felt backing on the abrading table and place the abradant over the felt. Check that waft and warp of the woven wool abradant lie parallel to the edges of the machine frame
Compress the felt and abradant on the abrading table with a pressing weight described in EN ISO 12497-1. Fit the damping flng (or appropriate device) and seca,e the felt and abradant firmly. Remove the pressing weight. Ensure that the abradant is retained In a wrinkle-tree condition.
6.2.3 Wrinkles
If the specimen or the abradant cannot be mounted in a wrmkle-free position, the loam or left backing shall be
omitted, but this shall be stated in the test report.
6.2.4 PreparatIon of the abrasion machine
After mounting the specimens in the test piece holders and the abradant on the abrading table, place the test piece holder guide plate in position on the Martindale apparatus Correctly position the test piece holders and spindles with additional loading pieces (9 kPa or 12 kPa) at their respective work stations,
Use pressure spinle 9 kPa unless otherwise specified m the requirement standard.
NOTE Spindles and acidibonal loading pieces (9 kPa or 12 kPal are ctescrted in EN ISO 12947-L
6.3 Procedure
Preset intervals of rubs to the abrasion machine as the requirement standard states. If intervals are not given ii the requirement standard, apply the relevant test series given in Table 1.
Estimate the possible breakdown point of the test material and choose a suitable test series The test may be repeated If the estimation is inaccurate.