Paper mill press felt conditioner

Details Paper mill press felt conditioner Paper mill press felt conditioner

1991-03-25

1992-12-01

Schor, Kenneth M.

Paper making and fiber liberation

Processes and products

Conditioning, preparing or repairing of apparatus

162DIG4, D21F 132

Patent

active

051677679

ABSTRACT:
This invention relates to an improved press felt conditioning treatment which controls the deposition of polymerically flocculated particulate substances in a press felt. The treatment comprises applying to the felt an effective inhibiting amount of a conditioner comprising a combination of a polymethylnaphthalene sulfonate and a type A phosphate ester comprising a nonyl phenol hydrophobe based phosphate ester having between 6 and 10 moles of ethylene oxide and a mono to diester ratio of approximately 60 to 40 or a type B phosphate ester comprising a tridecyl alcohol hydrophobe based phosphate ester having between 6 and 10 moles of ethylene oxide and a mono to diester ratio of about 60 to 40. The use of this combination was found to be especially effective at preventing the deposition of polymerically flocculated particulate substances in a press felt and paper machine.

REFERENCES:
patent: 3398047 (1968-08-01), Michalski
patent: 3873417 (1975-03-01), Otrhalek et al.
patent: 3992249 (1976-11-01), Farley
patent: 4184912 (1980-01-01), Panton
patent: 4810301 (1989-03-01), Yoshioka et al.
patent: 4895622 (1990-01-01), Barnett
Chem. Abstract, No. 83-731360/32.

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