Method for producing recycled materials for hygienic end uses

Details Method for producing recycled materials for hygienic end uses Method for producing recycled materials for hygienic end uses

1994-01-31

1995-10-17

Jones, W. Gary

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Waste paper or textile waste

162 4, 162 8, D21C 502

Patent

active

054587360

ABSTRACT:
This invention relates to a method for producing packaging materials containing reclaimed/recycled fiber by chemically hydrolyzing the fiber, treating the fiber at elevated temperature greater than 100.degree. C., adding a reduced sulfur agent to the fiber to reduce the sulfur content of the fiber by forming insoluble heavy metal sulfide compounds which precipitate from the hydrolyzed fiber, oxidizing and then washing the fiber to produce a paper pulp. Such methods of this type, generally, produce reclaimed/recycled fiber that is sufficiently hygienic for food grade and medical device packaging applications.

REFERENCES:
patent: 2582496 (1952-01-01), Massey et al.
patent: 2959513 (1960-11-01), Savage
patent: 4917706 (1990-04-01), Meszaros
patent: 5211809 (1993-05-01), Naddeo et al.
patent: 5234544 (1993-08-01), Naddeo
patent: 5298168 (1994-03-01), Guess

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