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Valmet Launches New Bioneer Press Roll Covers with Reduced Climate Impact

Södra Cell Mörrum Boosts Pulp Quality and Process Stability

TAPPI Selects Fellows for 2026

TAPPI Announces its Fellows Class for 2026

Swiss Industrial Engineering and Manufacturing Company Sulzer Joins Spinnova’s Ecosystem

Sulzer, a Swiss industrial engineering and manufacturing company, has joined Spinnova’s ecosystem (consortium) to enable the availability of SPINNOVA® fibre in the textile materials market. Sulzer will contribute its expertise to support Spinnova’s development work.

International Paper Acquiring North Pacific Paper Company for €305.64 Million

International Paper is acquiring One Rock Capital Partners portfolio North Pacific Paper Company (NORPAC) for $360 million (€305,640,000), aiming to meet increasing demand for lightweight recycled containerboard.

MM Group Recognized as One of Europe’s Climate Leaders

MM Group has been recognised as one of Europe’s Climate Leaders 2026 by the Financial Times for  the first time, marking another important external validation of MM’s climate performance and long-term sustainability strategy. 

Cascades Unveils 2026–2030 Sustainability Plan

Cascades has unveiled its new 2026–2030 sustainability plan, titled Rising Together, outlining the company’s priorities and commitments for the next five years.

Metsä Group Inaugurates “World’s Most Modern Tissue Mill” In Mariestad, Sweden

The €370 million investment in Mariestad is one of the largest in the European tissue industry

Understanding extensibility of paper: Role of fiber elongation and fiber bonding, TAPPI Journal March 2020

ABSTRACT: The tensile tests of individual bleached softwood kraft pulp fibers and sheets, as well as the micro-mechanical simulation of the fiber network, suggest that only a part of the elongation potential of individual fibers is utilized in the elongation of the sheet. The stress-strain curves of two actual individual pulp fibers and one mimicked classic stress-strain behavior of fiber were applied to a micromechanical simulation of random fiber networks. Both the experimental results and the micromechanical simulations indicated that fiber bonding has an important role not only in determining the strength but also the elongation of fiber networks. Additionally, the results indicate that the shape of the stress-strain curve of individual pulp fibers may have a significant influence on the shape of the stress-strain curve of a paper sheet. A large increase in elongation and strength of paper can be reached only by strengthening fiber-fiber bonding, as demonstrated by the experimental handsheets containing starch and cellulose microfibrils and by the micromechanical simulations. The key conclusion related to this investigation was that simulated uniform inter-fiber bond strength does not influence the shape of the stress-strain curve of the fiber network until the bonds fail, whereas the number of bonds has an influence on the activation of the fiber network and on the shape of the whole stress-strain curve.

Water and grease resistance of paperboard coated with long chain cellulose fatty acid esters using electrostatic powder coating, TAPPI Journal April 2026

ABSTRACT: Fiber-based materials used for foodservice, takeaway, and other packaging applications must typically provide water and grease resistance. Simultaneously, there is growing interest towards bio-based and renewable barrier coatings. In this study we applied thermoplastic long chain fatty acid cellulose esters onto paperboard using electrostatic powder coating to create barrier properties of interest. Electrostatic powder coating provides a water-free process to tackle moisture-induced quality issues and to provide an even coating layer. Cellulose octanoate and palmitate esters were produced in pilot scale. These were ground into fine particles using liquid nitrogen and applied onto paperboard sheets using an electrostatic powder gun. The loosely packed coatings were fixed and fused onto the paperboard by hot pressing. We characterized the coated sheets for coating thickness, contact angles with water, water absorption, grease resistance (KIT), and olive oil barrier. Two commercial polyethylene powders were used as references. Our results indicated that the long chain cellulose fatty acid ester coatings were thermoplastic and hydrophobic with contact angles above 100°. Water absorption was similar to the reference coatings. While grease resistance was lower than with the references, the cellulose ester coatings slowed down diffusion of olive oil through the paperboard. Cellulose octanoate ester with a lower melt viscosity already provided smooth coatings after the initial hot pressing step, while in most cases, the second post hot pressing step further improved the barrier properties.