| 摘要 |
PROBLEM TO BE SOLVED: To reduce wastes by processing PS ash (incinerated ash of paper sludge) or coal ash by a relatively easy method and usefully using the ash in relation to a paperboard. SOLUTION: The PS ash or coal ash is prepared so as to provide 20-100μm average particle diameter. Thereby, the paperboard comprising the resultant ash mixed in an amount of≥0.01 to≤3 wt.% is produced. COPYRIGHT: (C)2007,JPO&INPIT
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