The invention relates to papermaking processes wherein calcium carbonate is included in a pulp suspension. The dissolution of the calcium carbonate in the papermaking system is prevented or substantially retarded by the introduction of carbon dioxide to said pulp suspension in connection with subjecting said calcium carbonate in said papermaking system to pH conditions of about 8 or lower. The invention also provides processes for the production of paper or board in papermaking systems wherein solid calcium carbonate is present as a filler and/or pigment.
申请公布号
WO9935333(A1)
申请公布日期
1999.07.15
申请号
WO1998FI00558
申请日期
1998.06.25
申请人
AGA AKTIEBOLAG;UPM-KYMMENE CORPORATION;LAURILA-LUMME, AULI;PAKARINEN, HEIKKI;LEINO, HANNU, JUHANI
发明人
LAURILA-LUMME, AULI;PAKARINEN, HEIKKI;LEINO, HANNU, JUHANI