Ding et al. J Wood Sci
(2020) 66:55
Page 4 of 9
Fig. 2 Mass-weighted size distribution of MDF sanding dust determined by sieve analysis (histogram: differential size distribution, line: cumulative size distribution)
Fig. 3 SEM images of MDF sanding dust. a Dust retained on the 40-μm sieve, b dust passing through the 40-μm sieve
generated by transwall failure of the fibers under the sanding forces, which were hard to be classified into a certain shape category. However, there also existed some particles with relatively regular shape, like crystal or brick shape as shown in Fig. 4. They were remarkably different from wood particles in shape and surface texture. This
around 1 mm in length and 10 μm to 20 μm in width, similar to the size of typical hardwood fibers [31]. No fibrous particle existed in the sample falling down the 40-μm sieve though some elongated particles were found (Fig. 3b). These particles, and those with even shorter lengths, were irregularly shaped fiber fragments
Made with FlippingBook - Online catalogs