Paper mill press felt conditioner

Details Paper mill press felt conditioner Paper mill press felt conditioner

D - Textiles, Paper

21

H

117/210, 117/214

D21H 21/02 (2006.01) D06M 13/07 (2006.01) D06M 13/256 (2006.01) D06M 13/292 (2006.01) D06M 15/19 (2006.01) D06M 15/233 (2006.01) D21F 1/30 (2006.01)

Patent

CA 2039210

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 polymethylnapthalene 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.

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