Paper making and fiber liberation – Processes and products – Non-uniform – irregular or configured web or sheet
Patent
1993-02-05
1995-05-16
Chin, Peter
Paper making and fiber liberation
Processes and products
Non-uniform, irregular or configured web or sheet
162112, 162135, 162141, 162142, 162147, 162148, 162158, 162175, 1621681, 1621683, 162178, 47 56, 47 9, D21H 1112
Patent
active
054157366
ABSTRACT:
A sheet material, typically paper or cardboard, contains a natural, chemically untreated fibrous material and a secondary long-staple fiber material in a weight ratio comprised between (50-90):(10-50). It further contains fiber fines, at least one retention agent for these fines and at least one sheet strength improving agent. The sheet may be manufactured on paper making machines after preparing a mash from the components listed above and refining. The sheet material is intended to replace paper or cardboard normally made from chemically treated, expensive raw materials.
REFERENCES:
patent: 2685150 (1954-08-01), Linehan
patent: 3158530 (1964-11-01), Anastasio
patent: 3825471 (1974-07-01), Fraiman
patent: 4272919 (1981-06-01), Schmidt
patent: 5191734 (1993-03-01), Weber et al.
Freeman, "Successful Testing of a Wood Substitute for Making News Print May Lead to Mill," Wall Street Journal, Nov. 4, 1987, p. 40.
Patent Abstracts of Japan; vol. 12, No. 478; (M-775) Dec. 14, 1988 & JP, A, 62 199 605 Database WPIL Section PQ, Week 9006, Derwent Publications Ltd., Class P-31; AN 90-040626 & JP A.1 317 338.
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