Process for making paper or paper board comprising, forming an aqueous cellulosic suspension, adding a retention system to the cellulosic suspension, draining the suspension on a screen to form a sheet and drying the sheet, wherein the retention system comprises a swelling clay which has a TAPPI brightness of at least 70.
申请公布号
WO03000985(A1)
申请公布日期
2003.01.03
申请号
WO2002EP06721
申请日期
2002.06.18
申请人
CIBA SPECIALTY CHEMICALS WATER TREATMENTS LIMITED;CHEN, GORDON,CHENG, I.;WILLIAMS, STEPHANIE, CAINE