Mica and vermiculite paper and its preparation

Details Mica and vermiculite paper and its preparation Mica and vermiculite paper and its preparation

1991-03-18

1992-06-30

Chin, Peter

Paper making and fiber liberation

Processes and products

Mineral fiber

162145, 162146, 1621572, 1621682, 1621683, 1621816, 162183, D21H 1300

Patent

active

051260131

ABSTRACT:
Mineral paper is provided which comprises a wet-laid sheet of 1) fibers, 2) a floc of a silicate selected from the group consisting of mica and vermiculite, the said floc having a cationic polymeric flocculant having a molecular weight in the range of from about 10,000 to about 1,000,000, and 3) a non-ionic polymeric flocculant having a molecular weight of from about 2,000,000 to about 10,000,000. A process is described herein for the preparation of the paper using the two flocculants by first flocculating with the cationic polymeric flocculant and then flocculating in another step with the non-ionic polymeric flocculant to obtain an easily drained flocculated mixture which is dewatered to obtain the mineral paper.

REFERENCES:
patent: 3916057 (1975-10-01), Hatch et al.
patent: 4549931 (1985-10-01), Adamowicz et al.
patent: 4775586 (1988-10-01), Bohrn et al.

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