Process for improving the dry strength of paper and for improvin

Details Process for improving the dry strength of paper and for improvin Process for improving the dry strength of paper and for improvin

1979-02-23

1980-07-01

Smith, William F.

Paper making and fiber liberation

Processes and products

Non-fiber additive

162168N, 162175, 162177, 162181R, 162181B, 162181C, 162181D, 162181A, 162183, 427158, D21H 380

Patent

active

042104882

ABSTRACT:
A process for improving the dry strength of paper and for improving the effect of optical brighteners in the preparation or coating of paper which includes the step of adding fillers and/or pigments and anionic brighteners to the paper making process the improvement comprising adding to paper making pulp a polypiperidine halide absorbed in a dispersed state on a fine-particle organic or inorganic carrier before the anionic brightener is added.

REFERENCES:
patent: 3453262 (1969-07-01), Roberts
patent: 3639208 (1972-02-01), Varveri et al.
patent: 4066494 (1978-01-01), Scharf et al.

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