Enzymatic press felt treatment

Details Enzymatic press felt treatment Enzymatic press felt treatment

2007-12-10

2009-08-25

Halpern, Mark (Department: 1791)

Paper making and fiber liberation

Processes and products

Conditioning, preparing or repairing of apparatus

C162S158000, C162SDIG004, C134S015000, C134S021000, C435S041000

Reexamination Certificate

active

07578904

ABSTRACT:
Methods for reducing or inhibiting deposition on or within press felts to increase the effective life of the press felt and reduce or eliminate the need for batch cleaning are disclosed. The methods disclosed treat press felt while paper is being produced with compositions containing at least one enzyme. Additionally, the enzymes can be applied in combination with other non-enzymatic felt conditioning products either by blending and applying at the same application point or by applying the enzyme and the non-enzymatic felt conditioning product at two different locations along the felt. The treatments are applied continuously or intermittently.

REFERENCES:
patent: 4995944 (1991-02-01), Aston et al.
patent: 5961735 (1999-10-01), Heitmann et al.
patent: WO 97/01669 (1997-01-01), None
patent: WO 9711225 (1997-03-01), None

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