The invention relates to a filler used in paper manufacture and mainly consisting of calcium carbonate, and to a procedure for producing the filler. The filler consists of porous aggregates formed by precipitated calcium carbonate particles. In the procedure, calcium carbonate is precipitated.
|IPC||C01F11/18 C09C1/00 C09C1/02 (+4)|
|Publication status||Published - 16 Jan 1997|
|MoE publication type||H1 Granted patent|