Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Waste paper or textile waste
Patent
1997-06-06
1999-11-16
Nguyen, Dean T.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Waste paper or textile waste
162 4, D21C 502
Patent
active
059850957
ABSTRACT:
A tackified, mixed rubber, hot melt PSA deinking composition and an improved process for removing inks and other contaminants from printed wastepaper are provided. A preferred deinking composition contains a mixture of SB and SIS rubbers, tackified with at least one hydrocarbon resin tackifier and at least one rosin-based tackifier. In an improved deinking or recycling process, the novel composition is added to a paper slurry, either directly or as PSA-coated paper or label stock, and significantly reduces the number of contaminants that remain after screening and forward cleaning.
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Avery Dennison Corporation
Nguyen Dean T.
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