Paper making and fiber liberation – Processes and products – Conditioning – preparing or repairing of apparatus
Reexamination Certificate
2007-01-23
2007-01-23
Halpern, Mark (Department: 1731)
Paper making and fiber liberation
Processes and products
Conditioning, preparing or repairing of apparatus
C162S272000, C162S164100, C162S175000, C162SDIG004
Reexamination Certificate
active
10444522
ABSTRACT:
A method for controlling Pitch and Stickies is disclosed. The method comprises adding hydrophobically modified hydroxyethyl cellulose (HMHEC) and cationic polymers to a cellulosic fiber slurry (pulp) or to a paper process or to a paper making system and results in a higher degree of inhibiting organic deposition and retention of pitch on paper fiber as compared to the inhibition of the individual ingredients. The combination of HMHEC and cationic polymers surprising results in a synergistic effect.
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Koerhuis Raymond
Singleton Freddie L.
van de Steeg Riet
Fobare Rossi Joanne Mary
Halpern Mark
Hercules Incorporated
Samuels Gary A.
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