Production of filled paper

Details Production of filled paper Production of filled paper

1994-01-21

1996-03-26

Chin, Peter

Paper making and fiber liberation

Processes and products

Non-fiber additive

1621646, 1621681, 1621682, 1621683, 162175, 1621812, 1621816, 1621818, D21H 2110

Patent

active

055017746

ABSTRACT:
Filled paper is made by providing an aqueous feed suspension containing filler and cellulosic fibre, coagulating the fibre and filler in the suspension by adding cationic coagulating agent, making an aqueous thinstock suspension by diluting a thickstock consisting of or formed from the coagulated feed suspension, adding anionic particulate material to the thinstock or to the thickstock from which the thinstock is formed, subsequently adding polymeric retention aid to the thinstock and draining the thinstock for form a sheet and drying the sheet.

REFERENCES:
patent: 4445970 (1984-05-01), Post et al.
patent: 4749444 (1988-06-01), Lorz et al.
patent: 4795531 (1989-01-01), Sofia et al.
patent: 4902382 (1990-02-01), Sakabe et al.
Data Base Paperchem-The Institute of Paper Science and Technology, Atlanta, GA, "Improvement in Retention of Filler in Papermaking", E. Maegawa, & JAP. Pat. Kokai 61,588/89, Mar. 8, 1989, Kyoritsu Yuki Co., Ltd.

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