Wet Strength Development of Cellulosic Materials via Caustic Treatment

Thecharacter of coir handsheets prepared with beating and addition of polyamideamine-epichlorohydrin (PAE) was investigated. Pulp coir from soda-anthraquinone pulping was used as raw material for manufacture of coir handsheets. Physical and mechanical properties obtained with different beating level and PAE dosage were measured. The addition of PAE 10% w/w and beating on pulp stock of 3000 rev increased grammage and density at 1.9 and 15.8%, respectively. Instead it decreased thickness by 15.8%. Addition PAE dosage of 10% w/w at 10000 rev improved the density, but decreased the porosity and Cobb<sub>60</sub> at 5.8; 10.2; and 19 %, respectively. The highest dry and wet tensile were obtained at 20 % w/w of PAE. Combination of beating and addition of PAE on pulp stock formed wet-strength handsheets with range between 28.0 to 34.2%.

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Mechanism of dielectric-barrier discharge initiated wet-strength development

Journal of Applied Polymer Science ◽

10.1002/app.22422 ◽

2005 ◽

Vol 98 (5) ◽

pp. 2219-2225 ◽

Cited By ~ 5

Author(s):

L. C. Vander Wielen ◽

M. Östenson ◽

P. Gatenholm ◽

A. J. Ragauskas

Keyword(s):

Dielectric Barrier Discharge ◽

Barrier Discharge ◽

Strength Development ◽

Wet Strength ◽

Dielectric Barrier

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Mechanism of paper wet strength development by polycarboxylic acids with different molecular weight and glutaraldehyde/poly(vinyl alcohol)

Journal of Applied Polymer Science ◽

10.1002/app.23298 ◽

2006 ◽

Vol 101 (1) ◽

pp. 277-284 ◽

Cited By ~ 13

Author(s):

Gordon Guozhong Xu ◽

Charles Qixiang Yang ◽

Yuling Den

Keyword(s):

Molecular Weight ◽

Vinyl Alcohol ◽

Poly Vinyl Alcohol ◽

Strength Development ◽

Wet Strength ◽

Polycarboxylic Acids ◽

Different Molecular Weight

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The wet strength of water- and foam-laid cellulose sheets prepared with polyamideamine-epichlorohydrin (PAE) resin

Nordic Pulp & Paper Research Journal ◽

10.1515/npprj-2018-3056 ◽

2018 ◽

Vol 33 (3) ◽

pp. 496-502 ◽

Cited By ~ 1

Author(s):

Mika Vähä-Nissi ◽

Timo Lappalainen ◽

Kristian Salminen

Keyword(s):

Positive Impact ◽

Maximum Level ◽

Strength Development ◽

Ionic Surfactant ◽

Wet Strength ◽

Foaming Agents ◽

Retention Aids ◽

A Minor ◽

The Impact ◽

Addition Level

Abstract Some paper and paperboard grades require strength also when rewetted. The purpose of this study was to investigate the impact of web forming method, different foaming agents, polyamideamine-epichlorohydrin (PAE) wet strength resin, and retention aids on the strength development of hand sheets. Only a slight, if any, improvement in dry tensile strength due to PAE resin was observed. PAE improved the wet strength of the water-laid sheets, and the retention systems had a minor but positive impact. Although wet strength was lower at given PAE addition levels, the trend was similar with the sheets foam-laid with an anionic foaming agent, except at high PAE levels. With the non-ionic surfactant the maximum level of wet strength was reached already at a low PAE addition level and use of retention aids decreased wet strength. Such differences between the water- and foam-laid sheets are most likely due to the chemical interactions between PAE, foaming agents, and other additives.

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