Paper web and process for making the same

Paper making and fiber liberation – Processes and products – Multi-layer waterlaid webs or sheets

Patent

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Details

162103, 162124, 162129, 162134, 162147, 162218, 264121, D21F 1300

Patent

active

060304979

ABSTRACT:
A multi-ply paper web comprises a base ply of a post-manufactured sheet such as reused old newsprint or reused office waste. An upper and/or lower ply bonded to the base ply covers any printing or contamination of the base ply, thus allowing the resulting web to be reprinted or used for writing or packaging grades. The base ply is not repulped, reducing water and energy usage in the manufacturing process. The upper and lower plies may be wet formed or dry formed. Dry-formed upper and/or lower plies result in a paper product utilizing little or no water in the manufacturing process, and no aqueous effluent. The post-manufactured base ply provides the strength ply. Multiple layers in the base ply or, alternatively, a contrast-reducing process on printed surfaces of the base ply, reduce show through of the final web.

REFERENCES:
patent: 28370 (1860-05-01), Howell
patent: 3954554 (1976-05-01), Curry et al.
patent: 4046622 (1977-09-01), Attwood et al.
patent: 4115602 (1978-09-01), Bullard
patent: 4324753 (1982-04-01), Gill
patent: 5061344 (1991-10-01), Wedlin et al.
patent: 5612766 (1997-03-01), Ida et al.
patent: 5632856 (1997-05-01), Buie

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