Paper making and fiber liberation – Processes and products – Non-fiber additive
Patent
1987-11-05
1989-09-12
Chin, Peter
Paper making and fiber liberation
Processes and products
Non-fiber additive
162183, D21H 344
Patent
active
048656917
ABSTRACT:
A new method for internally strengthening products formed from fibrous materials and the resulting products are provided. The method is characterized by the use of a wet-end additive and specifically a particular grade of polyvinyl alcohol which is super-hydrolyzed and which is substantially insoluble in water maintained at 130 degrees Fahrenheit. In addition, the polyvinyl alcohol particles have an extremely high hydrated bulk volume so that they form a highly stable suspension in water and which aids in achieving high retention of the particles in the web of the resulting product. The products formed by the method as described exhibit substantial improvements in strength properties.
REFERENCES:
patent: 2136110 (1938-11-01), Lane et al.
patent: 2330314 (1943-09-01), Schwartz
patent: 2402469 (1946-06-01), Toland et al.
patent: 2563897 (1951-08-01), Wilson et al.
patent: 2601598 (1952-06-01), Daniel, Jr. et al.
patent: 3114670 (1963-12-01), Iwasaki
patent: 3183137 (1965-05-01), Harmon et al.
patent: 3257267 (1966-06-01), Hay
patent: 3276359 (1966-10-01), Worthen et al.
patent: 3644912 (1972-05-01), Olson
patent: 3773513 (1973-11-01), MacClaren
patent: 3878038 (1975-04-01), Opderbeck et al.
patent: 3937865 (1976-02-01), Jongetjes
patent: 4042748 (1977-08-01), Hebbel et al.
patent: 4170672 (1979-10-01), Moriya et al.
patent: 4372814 (1983-02-01), Johnstone et al.
patent: 4501640 (1985-02-01), Soerens
Article from 1982 Tappi Paper Makers Conference, David W. Zunker, 1982.
Polyvinyl Alcohol (Chp. 12-"Use of Polyvinyl Alcohol in Paper Manufacture"), John Wiley & Sons (Kaname Tsunemitsu, et al.), 1973.
Chin Peter
Colloids, Inc.
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