PAPERmaking! g FROM THE PUBLISHERS OF PAPER TECHNOLOGY Volume 3, Number 2, 2017
L&W Crush Tester code 248 tests corrugated board, liner and fluting as well as performing compression tests on small boxes. The instrument measures new crush properties such as flat crush hardness and the total energy absorbed during a FCT measurement. A built-in plate distance sensor can also be used to measure the corrugated board thickness. All measured properties are programmed into the instrument before delivery. Benefits a) Easy to use with pre-programmed start position and evaluation of
measurements, all for easy shift between measurements such as RCT and ECT b) Robust construction for reliable measurement results, especially important when measuring FCT so that the test piece does not shear and cause “leaning” flutes c) Gives automatically correct FCT value – Manual settings for each flute type is not needed d) Measures new crush properties such as flat Crush Hardness, flat crush energy and flat crush stiffness
L&W Bursting Strength Tester code 181 measures (according to Mullen) bursting strength of corrugated board. Furthermore it also measures bursting energy absorption (BEA) and diaphragm-compensated bursting strength. Sample is automatically detected,
measurement starts once a test piece has been placed in the measuring gap. To maximize the sample measurement rate, L&W Bursting Strength Tester takes a minimal amount of time between bursts, so that a series of 10 measurements can be done in less than 45 seconds. Benefits a) Very fast testing cycle gives fast feedback to the production b) Auto-start, a photocell detects the presence of a sample and automatically initiates a measurement sequence, thus allowing hands-free operation c) Auto-cycling function permits the continuous cycling of the upper pressure foot to facilitate representative and continuous measurements d) Available with automatic test strip feeder
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Article 9 – L&W Board Testing
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