Repulping of wet strength paper towel with potassium monopersulfate

Rui-xia, Yang; Luettgen, Christopher O.

doi:10.32964/tj19.9.463

Cited by 3 publications

(1 citation statement)

References 17 publications

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“…Less is known about the produced white-water quality, which can be a source for micro and macro stickies, high biological oxygen demand (BOD), or other sources of byproducts that may negatively affect the papermaking process. A pH swing can also be observed after the repulping process; for example, the pH dropped from 10 to 8.8 when Oxone was used to repulp PAAE based towel paper (Chatrath and Durge 2011;Yang and Luettgen 2020).…”

Section: Future Of the Recyclability Of Paae Wet-strengthened Papersmentioning

confidence: 99%

Polyamidoamine epichlorohydrin (PAAE) wet-strength agent: Generations, application, performance, and recyclability in paperboard and linerboard

Ntifafa,

Ji,

Hart

2024

BioRes

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Polyamidoamine epichlorohydrin (PAAE) is the preeminent permanent wet strength additive used in papermaking. Wet strength additives are used to improve paper resistance to a rupture force in wet environments. The invention of PAAE in 1957 was an innovation, as it improved paper properties by giving superior wet strength in humid or wet conditions. It was rapidly adopted by the industry. Despite PAAE’s long history, the mechanism of PAAE interaction with fiber has not been fully understood. Therefore, fundamental understanding of PAAE mechanism needs to be investigated to improve its utilization in making sustainable paper products. These areas include an understanding of repulping methods and optimal PAAE dosages for better cost and performance. This paper investigates different generations of PAAE, the application method, and its impact on paper recyclability. Three generations of PAAE are currently on the market with at least two newer iterations under development. Critical application parameters that need to be understood include determination of the bonding mechanism, optimal dosage, and retention parameters. The main drawback of PAAE application is it makes paper recycling difficult. Several repulping methods are proposed for better recyclability and sustainability in the papermaking process.

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Section: Future Of the Recyclability Of Paae Wet-strengthened Papersmentioning

confidence: 99%

Polyamidoamine epichlorohydrin (PAAE) wet-strength agent: Generations, application, performance, and recyclability in paperboard and linerboard

Ntifafa,

Ji,

Hart

2024

BioRes

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Physical properties of kraft pulp oxidized by hydrogen peroxide under mildly acidic conditions

Martinsson

Hasani

Theliander

2022

Nordic Pulp &Amp; Paper Research Journal

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The objective of this study is to gain further insight into the compositional and physical changes of kraft pulp caused by oxidation with hydrogen peroxide under acidic conditions. A softwood kraft pulp has been subjected to varying degrees of oxidation. Changes in the composition, as well as resulting physical properties of laboratory sheets were investigated. Findings indicated that the oxidation resulted in an increased carbonyl group content, a decrease in intrinsic viscosity and a change in hemicellulose composition. The oxidized pulps were found to have a reduced water retention value and a slightly reduced tensile strength (4–11 % at the investigated conditions). However, a substantial increase in wet web tensile strength (6–23 %) and wet tensile strength (134–242 %) of the sheets was obtained. The sheets could easily be repulped and an increased wet strength maintained to a large extent, even after recycling of the sheets.

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Water-dispersible paper for packaging applications – balancing material strength and dispersibility

Pfennich,

Schoeffmann,

Lammer

et al. 2023

Nordic Pulp &Amp; Paper Research Journal

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Water-dispersible paper is useful for packaging applications as it disintegrates into its fibers after usage, and also is a fully biodegradable material. Here, we first introduce a laboratory testing method for the disintegration performance of different paper grades under low agitation in water. Then a quantitative analysis on the technological and physical mechanisms responsible for dispersibility of paper is performed. We identify lignin content, degree of refining and addition of starch as relevant factors reducing paper dispersibility. Addition of a debonding agent, a non-ionic surfactant, was not found to be effective here. We found a strong correlation of both, wet- and dry tensile strength to dispersibility. From all water absorption related paper properties only ultrasonic liquid penetration measurements were correlated to paper dispersibility. Principal component analysis revealed that paper strength and water penetration speed are not governed by different latent variables but instead are all strongly associated with the first principal component. This suggests that the same mechanisms are responsible for reduction of water penetration speed and wet/dry strength. Hence we suggest to decouple network strength and water penetration, e.g. by identifying suitable additives imparting bonding strength without reducing the access of water which is required to break the fiber–fiber bonds.

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Repulping of wet strength paper towel with potassium monopersulfate

Cited by 3 publications

References 17 publications

Polyamidoamine epichlorohydrin (PAAE) wet-strength agent: Generations, application, performance, and recyclability in paperboard and linerboard

Polyamidoamine epichlorohydrin (PAAE) wet-strength agent: Generations, application, performance, and recyclability in paperboard and linerboard

Physical properties of kraft pulp oxidized by hydrogen peroxide under mildly acidic conditions

Water-dispersible paper for packaging applications – balancing material strength and dispersibility

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