Synthesis and Application of a Cationic Polyamine as Yankee Dryer Coating Agent for the Tissue Paper-Making Process.

Carlos David Grande Tovar,Cesar Valencia,Yamid Valencia

doi:10.3390/polym12010173

Abstract

Tissue paper is of high importance worldwide and, continuously, research is focused on improvements of the softening and durability properties of the paper which depend specifically on the production process. Polyamide-amine-epichlorohydrin (PAE) resins along with release agents are widely used to adhere the paper to the yankee dryer (creping cylinder) in paper manufacture. Nevertheless, these resins are highly cationic and they normally adhere in excess to the paper which negatively affects the creping process and the quality of the paper. For this reason, a low cationic polyamine-epichlorohydrin coating (Polycoat 38®) was synthesized from a diamine supplied by Disproquin S.A.S. and epichlorohydrin. The analysis of the synthesized polymer was carried out by Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (1H-NMR). The molecular weight of the polymer was obtained by gel permeation chromatography (GPC), physical-chemical properties such as kinematic viscosity, percentage of solids, density, charge density were measured and compared with a commercial PAE resin (Dispro620®) Thermal stability of the Polycoat 38® and glass transition temperature in presence of a release agent (Disprosol 17®) were also evaluated by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC), respectively. Finally, a peel adhesion test and an absorption durability assessment were carried out together with the evaluation of the creeping efficiency of the paper by caliber and tensile measurements in a tissue (towel paper) production plant, demonstrating a superior performance in the paper creping process as compared to some commercially available products.

Highlights

IntroductionCoating agents commercially available, such as Discrepel HRC® , Kymene 557H® , Rezosol 8223® , and others [2], are synthesized from various available additives, such as polyamine-amide resins mixed with polyvinyl alcohols and ethoxylated alcohols [2]
Coatings are adhesive compounds which facilitate the operation of the creping machines since they allow the paper to adhere to the yankee dryer’s surface at the last step of the tissue paper conversion [1]. These are used in conjunction with a release agent that controls the hardness of the coating and its adhesion, allowing the demolding of the paper once in contact with the creping blade as shown in Coating agents commercially available, such as Discrepel HRC®, Kymene 557H®, Rezosol 8223®, and others [2], are synthesized from various available additives, such as polyamine-amide resins mixed with polyvinyl alcohols and ethoxylated alcohols [2]
Was demonstrated to fulfill the requirements as a coating adhesive due to the presence of azetidine groups in its structure which allows interactions with polyoses of creped tissue paper. The presence of these groups was elucidated by Fourier transform infrared spectroscopy (FTIR), 1 H-RMN, and charge density analysis

Summary

Introduction

Coating agents commercially available, such as Discrepel HRC® , Kymene 557H® , Rezosol 8223® , and others [2], are synthesized from various available additives, such as polyamine-amide resins mixed with polyvinyl alcohols and ethoxylated alcohols [2]. They tend to develop less re-wettable hard coatings due to the high cationic charge of the polymer [3,4]. The most common release agents usually have the combination of other hand, the most common release agents usually have the combination of fatty alcohols, glycerol, fatty alcohols, glycerol, and non-ionic and non-ionic emulsifying agents such asemulsifying lecithin [6,7].agents such as lecithin [6,7]

Methods

Results

Conclusion