发明名称 |
Bulking and opacifying fillers for paper and paper board |
摘要 |
A method for producing bulking and opacifying kaolin fillers for filling cellulosic products is disclosed. An aqueous slurry of anionically dispersed kaolin particles is formed at 1 to 30% solids. A low-molecular-weight cationic aggregating agent is then added to the dispersed slurry to selectively aggregate fine and ultra-fine particles. The resultant aggregates are of larger mean particle size than the feed material and contain little or no fine and ultra-fine or colloidal particles. The net charge present on the aggregated particles is lower than that of the feed material. The aggregated structure contains within it a labyrinth of internal voids or pores. These mineral aggregates are then of a suitable size and surface charge to be retained well in a fiber web, and provide added bulk and opacity to the cellulosic products.
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申请公布号 |
US5676748(A) |
申请公布日期 |
1997.10.14 |
申请号 |
US19950581056 |
申请日期 |
1995.12.29 |
申请人 |
COLUMBIA RIVER CARBONATES |
发明人 |
BROWN, ALAN J. |
分类号 |
C09C1/28;C09C1/40;C09C1/42;C09C3/04;D21H17/68;D21H17/69;(IPC1-7):C09C1/02 |
主分类号 |
C09C1/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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