Paper mill press felt conditioner
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United States of America Patent
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-
Dec 1, 1992
Grant Date -
N/A
app pub date -
Mar 25, 1991
filing date -
Mar 25, 1991
priority date (Note) -
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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.
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