| http://www.w3.org/ns/prov#value | - According to this method, the average pore diameter of the grain layer can be controlled to at most 10 ??m, irrespective of the composition, concentration, etc. of the polyurethane elastomer, to provide a high water vapor permeability as well as to improve mechanical strength, such as flexing endurance, abrasion resistance or the like.
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