Pulp and paper products produced from recycled, high lignin cont

Details Pulp and paper products produced from recycled, high lignin cont Pulp and paper products produced from recycled, high lignin cont

1996-03-15

1996-12-24

Hastings, Karen M.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Waste paper or textile waste

162 8, 162100, 162147, D21C 502

Patent

active

055870481

ABSTRACT:
A method is disclosed for producing, in a continuous throughput, high quality paper from recycled waste paper utilizing high consistency, low shear pulping, followed by a series of cleaning steps to produce a wet, friable pulp which is digested and optionally bleached. The resulting pulp can be run on a paper machine alone or blended with virgin pulp to produce a paper containing at least 5% by weight recycled paper with less than 20 ppm per unit area solid non-fibrous contaminants larger than 0.3 mm.sup.2, and which may be blade coated on a high speed paper machine. The pulp and paper produced by the methods are also disclosed.

REFERENCES:
patent: 4737238 (1988-04-01), de Ruvo
patent: 5147503 (1992-09-01), Nguyen
patent: 5538594 (1996-07-01), Hank et al.
Kanazawa "Recovery of Unbleached Kraft Pulp from AOCC . . . Bleached Kraft Pulp" Nov. 1988.
Aikawa et al "Processing OCC, Deinking, Approach Flow Screening" World Pulp & Paper Technology 1990, pp. 102-105.

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