Tensile tests of individual bleached kraft pulp fibers and paper sheets industrial origin were conducted in order to investigate the effect refining small-scale fiber deformations on extensibility paper. The shape tensile curves most was concave upward (i.e., increasing slope) consisted two or three phases suggesting that fibrillar structure disordered regions wall straightened out during straining. Only a few BSKP apparently linear. Elongation varied from 8 32% average elongation not...

The tensile tests of individual bleached softwood kraft pulp fibers and sheets, as well the micro-mechanical simulation fiber network, suggest that only a part elongation potential is utilized in sheet. stress-strain curves two actual one mimicked classic behavior were applied to micromechanical random networks. Both experimental results simulations indicated bonding has an important role not determining strength but also Additionally, indicate shape curve may have significant influence on...

A simple and inexpensive method for producing water-stable pulp fibre yarns using a deep eutectic mixture composed of choline chloride urea (ChCl/urea) was developed in this work.Deep solvents (DESs) are mixtures consisting two or more components that together have lower melting point than the individual components.DESs been previously studied with respect to cellulose dissolution, functionalisation, pre-treatment.This new uses urea, which is used as swelling dispersing agent fibres...

Elongation is an important property of many packaging board and paper grades. Paper with high extensibility could provide alternative for oil-based materials. Micro- (CMF) nanofibrillated (CNF) cellulose are known to increase the strength a paper, but their effect on drying shrinkage elongation not well-studied. In this work, was reinforced fibrillated material. Added material increased shrinkage, which generally proportional before breakage. Results differed depending how it added (wet-end...

Abstract The relationship between shrinkage and elongation of hand sheets was examined. results show that the same dimensional contraction brought about by can be strained out in tensile testing. However, percentage-wise is greater than due to different reference points, difference increases strongly at higher levels. Elongation paper explained mainly two factors: net paper. Here refers all kinds in-plane fiber network (drying shrinkage, in-plane-compaction creping). novel concept ‘net...

The typically poor ductility of cellulosic fibers and ensuing bonded networks paper webs set limits on any effort to produce associated three-dimensional structures without relying chemical, often unsustainable, approaches. To address this challenge, we report a facile green method that combines mechanical biopolymer treatment: in-plane compression aqueous solution permeation via spraying. first enabled network extensibility while the second, which relied use either food-grade gelatin, guar...

The effects of spray additions alginate, cationic guar gum, or chitosan on paper properties were determined. aim this study was to enhance the mechanical papers after unrestrained drying, while maintaining increasing extraordinarily high elongation potential these papers. characteristics different polysaccharides determined by tensile test model films. Alginate resulted in very strong and stiff films with low strain at break values, gum significantly weaker softer break. polysaccharide...

Sandwich structures with Miura-ori cores have been studied especially in aerospace industry. However, by removing the face sheets one can obtain esthetical, multifunctional, self-supporting for various applications, such as packaging. This study focuses on mechanical performance of planar, under compressive loads. Through systematic variations both origami geometry and base material orientation, this performs linear stress stability analyses utilizing finite element method. The results...

A new substrate containing cellulose nanofibrils and inorganic pigment particles has been developed for printed electronics applications. The studied composite structure contains 80% fillers is mechanically stable flexible. Before drying, the solids content can be as low 20% due to high water binding capacity of nanofibrils. We have several drying methods their effects on properties. aim achieve a tight, smooth surface keeping efficiency simultaneously at level. include: (1) hot metal...

Sufficient tension of the wet web is crucial for paper machine runnability. As profitability pressures have been increasing, potential to improve runnability interest. The especially important machines running at high speeds, making lower grammage, and using large amounts filler or recovered paper. typical location breaks depends on grade machine. A break typically takes place when a fast draw applied web. Because information scarce, effect strain rate tensile properties, we investigated...

Generation of fiber foams with surface aeration was studied by simultaneous mixing pulp fibers, surfactant, air and water in a lab-scale tank. The took place either transient or turbulent conditions. effect impeller type (RT-6 BT-6), speed, power, surfactant dosage on content, bubble size half-life time the foam investigated. Air content increased increasing agitation power saturating to 50–75% depending SDS dosage. dependence law an exponent typical for processes where coalescence plays...

This paper was motivated by recent activity to replace synthetic, daily-life consumer package solutions with cellulose-based materials and tailored applications. investigation included a collection of 26 commercial paperboards. The main objective create foundations increase common understanding for further scientific research in highly interdisciplinary topic. Currently, the Miura-ori family is widely used applied origami, being most studied origami tessellation pattern due its simplicity...

Abstract The influence of wetting and drying during high-speed inkjet (HSI) printing on the time-dependent mechanical behavior commercial HSI papers was investigated using a custom-built C-Impact tensile tester. In water based ink solvent penetrates into paper while colorants adhere onto surface. We found that strongly affected stiffness strength already 0.1 s after wetting. Creep compliance strain at typical input tension 180 N/m are varying different process steps printing. order to...

Wood fiber-based packaging materials, as renewable have growing market potential due to their sustainability. A new breakthrough in cellulose-based requires some improvement the mechanical properties of paper. Bleached softwood kraft pulp was mechanically treated, two stages, using high- and low-consistency refining, sequentially. Chemical treatment oxyalkylation method applied modify a portion fiber material, especially surface, its compatibility with polymer dispersions including one...