D - Textiles – Paper – 21 – F
Patent
D - Textiles, Paper
21
F
D21F 1/32 (2006.01) D21F 1/30 (2006.01) D21F 7/08 (2006.01) D21F 11/00 (2006.01) D21F 13/00 (2006.01)
Patent
CA 2188466
This invention relates to an improved press felt conditioning treatment which controls the deposition of particulate substances in papermachine felts. The treatment comprises applying to the felt during paper production an effective inhibiting amount of an aqueous solution containing a pH control agent and a nonionic or anionic surfactant. The surfactant is preferably selected from the group consisting of dodecyl benzene sulfonates, lauryl ether sulfates, octyl phenol ethoxylates, nonyl phenol ethoxylates, dodecyl phenol ethoxylates, primary alcohol ethoxylates, secondary alcohol ethoxylates, ethoxylated polyoxypropylene glycols, dialkyl phenol ethoxylates, polyoxyethylene sorbitan monoester, linear alkylbenzene sulfonic acids, sodium xylene sulfonate, linear olefin sulfonates, fatty amine oxides, phosphate esters, fatty imidazoles, carboxylated derivatives of fatty imidazoles, sulfonated derivatives of fatty imidazoles, fatty amidobetanes, fatty sulphoamido-betanes and mixtures thereof.
L'invention se rapporte à un traitement de conditionnement perfectionné d'un feutre de presse de papier permettant de limiter le dépôt de substances particulaires dans les feutres des machines à papier. Ce traitement consiste à appliquer sur le feutre, lors de la production du papier, une quantité efficace inhibante d'une solution aqueuse contenant un agent de régulation du pH ainsi qu'un tensioactif non ionique ou anionique. Ce tensioactif est choisi, de préférence, dans le groupe consistant en dodécyle benzène sulfonates, lauryle éther sulfates, octyle phénol éthoxylates, nonyle phénol éthoxylates, dodécyle phénol éthoxylates, éthoxylates d'alcool primaire, éthoxylates d'alcool secondaire, polyoxypropylèneglycols éthoxylés, dyalcoyle phénol éthoxylates, monoester de polyoxyéthylène sorbitanne, acides sulfoniques d'alkylbenzènes linéaires, sodium xylène sulfonate, sulfonates d'oléfines linéaires, oxydes d'amines grasses, esters de phosphates, imidazoles gras, dérivés carboxylés d'imidazoles gras, dérivés sulfonés d'imidazoles gras, amidobétanes gras, sulfoamido-bétanes gras et mélanges de ces substances.
Duffy Robert James
Kershaw Philip
Betzdearborn Inc.
Borden Ladner Gervais Llp
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