Alkanolamine polymer salt additives for creping of fibrous webs
The present invention provides compositions a useful in the creping of paper products such as facial tissue and bathroom tissue. The compositions comprise an alkanolamine salt of a styrene-methacrylic acid co-polymer. According to a process according to the invention, a composition of the invention is contacted with the dryer cylinder in a creping process.
1 ) A process for creping tissue paper, comprising:
a) contacting an adhesive to the dryer used in the manufacture of tissue paper, wherein said adhesive comprises an aqueous dispersion comprising any amount of water in the range of 60% to 99.9% and from about 40% to about 0.1% solids, wherein the solids comprise an alkanolamine salt of a styrene-methacrylic acid co-polymer having a styrene content in the range of between 10.00% and 90.00% by weight based upon the total weight of said co-polymer, and a weight-average molecular weight in the range of between 3,000 and 500,000, wherein said alkanolamine is selected from the group consisting of: mono-alkanolamines; di-alkanolamines; and tri-alkanolamines, said alkanolamine including at least one C 1 to C 14 alkyl chain bonded to a nitrogen atom, wherein said at least one alkyl chain further includes at least one hydroxy group bonded to one of the carbon atoms in said at least one alkyl chain; b) causing a tissue paper web to be adhered to the surface of said dryer; and c) removing the web from the dryer via a blade.
2 ) A process according to claim 1 wherein said alkanolamine salt is present in any amount between 50 ppm and 5000 ppm based upon the total weight of said composition.
3 ) A process according to claim 1 wherein said alkanolamine is selected from the group consisting of: mono-ethanolamine, di-ethanolamine, tri-ethanolamine, mono-isopropanolamine, di-isopropanolamine, and tri-isopropanolamine.
4 ) A process according to claim 1 wherein the ratio of styrene to methacrylic acid content of said co-polymer is any amount between 10:90 to 90:10 on a weight basis.
5 ) A process according to claim 1 wherein the ratio of styrene to methacrylic acid content of said co-polymer is any amount between 25:75 to 75:25 on a weight basis.
6 ) A process according to claim 1 wherein the ratio of styrene to methacrylic acid content of said co-polymer is any amount between 40:60 to 60:40 on a weight basis.
7 ) A process according to claim 1 wherein the glass transition temperature of said co-polymer is at least 10° C.