In Examples 1 and 2 wherein {HEAD ~ the maximum particle size} of {TAIL ~ the starting material} was no greater than 63 μm and the mean particle size of the talc was at least 5 μm as shown in Table 1, no cell breakage was observed and the void volume exceeded 30% 
In Examples 1 and 2 wherein { HEAD ~ the maximum particle size } of { TAIL ~ the starting material } was no greater than 63 μm and the mean particle size of the talc was at least 5 μm as shown in Table 1 , no cell breakage was observed and the void volume exceeded 30 %
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH