Process of making paper

Details Process of making paper Process of making paper

1994-02-04

1996-07-23

Chin, Peter

Paper making and fiber liberation

Processes and products

Non-fiber additive

1621641, 162165, D21H 2110

Patent

active

055385966

ABSTRACT:
According to the invention, a process of making paper comprises forming a cellulosic suspension, adding retention aid to the suspension, draining the suspension through a screen to form a sheet, and drying the sheet and in this process we add to the suspension a retention system comprising polyethylene oxide and a greater amount (dry weight) of a phenolsulphone-formaldehyde resin (PSR resin) consisting essentially of recurring units of the formula

REFERENCES:
patent: 4070236 (1978-01-01), Carrard et al.
patent: 4680212 (1987-07-01), Blyth et al.

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