scholarly journals INFLUENCE OF BLEACHED SOFTWOOD AND HARDWOOD KRAFT PULPS ON TISSUE PAPER PROPERTIES

2019 ◽  
Vol 53 (5-6) ◽  
pp. 469-477 ◽  
Author(s):  
MÁRIA FIŠEROVÁ ◽  
◽  
JURAJ GIGAC ◽  
MONIKA STANKOVSKÁ ◽  
ELENA OPÁLENÁ ◽  
...  
Keyword(s):  
Kraft Pulps ◽  
Paper Properties ◽  
Tissue Paper

scholarly journals EFFECT OF ADDITION OF DEINKED PULP TO BLEACHED KRAFT PULP ON TISSUE PAPER PROPERTIES

Wood Research ◽  
2021 ◽  
Vol 66 (3) ◽  
pp. 505-516
Author(s):  
Monika Stankovská ◽  
Mária Fišerová ◽  
Juraj Gigac ◽  
Elena Opálená
Keyword(s):  
Water Absorption ◽  
Kraft Pulp ◽  
Kraft Pulps ◽  
Initial Water ◽  
Paper Properties ◽  
High Brightness ◽  
Tissue Paper ◽  
Tensile Index ◽  
Bleached Kraft Pulp ◽  
Eucalyptus Kraft Pulp

The influence of addition of deinked pulps with low and high brightness to bleached eucalyptus and pine kraft pulps on functional tissue paper properties was studied. Deinked pulps with low and high brightness had some different functional properties. Deinked pulp with high brightness has higher bulk, porosity, water absorption after immersion, initial water absorption, bulk softness as well as brightness. On the contrary, the difference in relative bonded area and porosity e between deinked pulps with low and high brightness was moderate. The mixed pulps laboratory pulp sheets from bleached eucalyptus kraft pulp or bleached pine kraft pulp with addition of 20, 40 and 80% of deinked pulp with low brightness or deinked pulp with high brightness were prepared. The addition of the deinked pulp with high or low brightness to bleached kraft pulp leads to increasing of bulk, bulk softness as well as high water absorption after immersion and initial water absorption. The tensile index rapidly decreased by the addition of deinked pulps with high brightness to bleached eucalyptus and pine kraft pulps. Similarly, the addition of deinked pulp with low brightness to bleached pine kraft pulp led to rapid decreasing of tensile index. On contrary, with the addition of deinked pulp with low brightness to eucalyptus kraft pulp, the decreasing of tensile index was less pronounced. Mixed pulp from bleached eucalyptus kraft pulp with a small content of deinked pulp with low brightness with functional properties suitable for production of tissue papers was found as optimal.

scholarly journals Cellulose fiber enzymatic modification to improve the softness, strength, and absorption properties of tissue papers

BioResources ◽  
2020 ◽  
Vol 16 (1) ◽  
pp. 846-861
Author(s):  
Flávia P. Morais ◽  
Ana M. M. S. Carta ◽  
Maria E. Amaral ◽  
Joana M. R. Curto
Keyword(s):  
Fiber Type ◽  
Capillary Rise ◽  
Reaction Times ◽  
Cellulose Fiber ◽  
Strength Properties ◽  
Enzymatic Modification ◽  
Absorption Properties ◽  
Paper Properties ◽  
Tissue Properties ◽  
Tissue Paper

Effects of enzymatic modification were evaluated in bleached Eucalyptus kraft and sulfite cellulosic pulps, separately, to improve key tissue paper properties and design new Eucalyptus fiber applications. Different cellulase dosages (0.01 mg and 0.1 mg of enzyme/g of pulp) and reaction times (30 min and 60 min) were used to modify the fibers and replace the traditional mechanical based refining or beating process. The results showed that for enzymatic modified kraft and sulfite pulps, the softness properties were improved by 1 and 2 units, respectively, for each unit of decreased strength properties. To achieve a balance between the tissue properties, the different fiber pulp furnishes that contained 80% of the enzymatically treated kraft pulp and 20% of the sulfite pulp with and without enzymatic treatment, were studied. Overall, the structures made with these mixtures presented softness properties in the commercial range (57.8 to 74.4), improved absorption properties (107 mm to 120 mm of capillary rise), and good strength properties (13.0 to 17.7 N.m/g). This study was conducted in order to adjust the fiber furnishes according to industrial tissue standards, using one Eucalyptus fiber type providing strength and another providing softness.

scholarly journals Computational Simulation Tools to Support the Tissue Paper Furnish Management: Case Studies for the Optimization of Micro/Nano Cellulose Fibers and Polymer-Based Additives

Polymers ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 3982
Author(s):  
Flávia P. Morais ◽  
Ana M. M. S. Carta ◽  
Maria E. Amaral ◽  
Joana M. R. Curto
Keyword(s):  
Case Studies ◽  
Raw Materials ◽  
Computational Simulation ◽  
Cellulose Fibers ◽  
Paper Properties ◽  
Fiber Modification ◽  
Simulation Tools ◽  
Tissue Paper ◽  
Nano Cellulose ◽  
End Use

Tissue paper production frequently combines two main types of raw materials: cellulose fibers from renewable sources and polymer-based additives. The development of premium products with improved properties and functionalities depends on the optimization of both. This work focused on the combination of innovative experimental and computational strategies to optimize furnish. The main goal was to improve the functional properties of the most suitable raw materials for tissue materials and develop new differentiating products with innovative features. The experimental plan included as inputs different fiber mixtures, micro/nano fibrillated cellulose, and biopolymer additives, and enzymatic and mechanical process operations. We present an innovative tissue paper simulator, the SimTissue, that we have developed, to establish the correlations between the tissue paper process inputs and the end-use paper properties. Case studies with industrial interest are presented in which the tissue simulator was used to design tissue paper materials with different fiber mixtures, fiber modification treatments, micro/nano fibrillated cellulose, and biopolymer formulations, and to estimate tissue softness, strength, and absorption properties. The SimTissue was able to predict and optimize a broader range of formulations containing micro/nanocellulose fibers, biopolymer additives, and treated-fiber mixtures, saving laboratory and industrial resources.

scholarly journals Blending impact of hardwood pulps with softwood pulp on tissue paper properties

Wood Research ◽  
2020 ◽  
Vol 65 (3) ◽  
pp. 447-458
Author(s):  
MONIKA STANKOVSKÁ ◽  
MÁRIA FIŠEROVÁ ◽  
JURAJ GIGAC ◽  
ELENA OPÁLENÁ
Keyword(s):  
Paper Properties ◽  
Tissue Paper ◽  
Softwood Pulp

scholarly journals Improvement of paper properties of recycled unbleached softwood kraft pulps by poly(allylamine hydrochloride)

BioResources ◽  
2011 ◽  
Vol 6 (1) ◽  
pp. 570-583
Author(s):  
Paulina Mocchiutti ◽  
María V. Galván ◽  
María C. Inalbon ◽  
Miguel A. Zanuttini
Keyword(s):  
Kraft Pulps ◽  
Paper Strength ◽  
Acid Media ◽  
Paper Properties ◽  
Cellulosic Fibers ◽  
Recycled Pulp ◽  
Bonding Area ◽  
Neutral Media ◽  
Allylamine Hydrochloride ◽  
Page Equation

Polyelectrolytes containing amine functional groups such as PAH (poly(allylamine hydrochloride)) can be useful, under certain conditions, for improving paper strength. In this work, the charge density of PAH was determined at different pH and ionic strengths; PAH adsorption onto the cellulosic fibers was characterized, and the effects of low PAH dosage on the papermaking properties were evaluated. It was found that the ionization of PAH is complete in acid media, but it is partial and depends on the ionic strength in neutral media. The adsorption isotherms of PAH on a recycled pulp from kraft liner allowed us to determine the amount needed to saturate the adsorption capacity of the fibers. For the three ionic strengths analyzed, the swelling of the fibers decreased when PAH was added in an amount corresponding to saturation (0.23% PAH on dried pulp). Nevertheless, the swelling was recovered when the amount of PAH was the double the saturation level (0.46% PAH on dried pulp). At these levels of addition, the papermaking properties were clearly improved, especially compressive strengths SCT (short compressive test) and CMT (concora medium test). The Page equation of tensile strength showed that PAH improved the shear bond strength, while the relative bonding area slightly decreased.

Comparison between uncreped and creped handsheets on tissue paper properties using a creping simulator unit

Cellulose ◽  
2020 ◽  
Vol 27 (10) ◽  
pp. 5981-5999 ◽  
Author(s):  
Tiago de Assis ◽  
Joel Pawlak ◽  
Lokendra Pal ◽  
Hasan Jameel ◽  
Lee W. Reisinger ◽  
...  
Keyword(s):  
Paper Properties ◽  
Tissue Paper

Using cationic polyvinyl alcohol (C-PVA) to improve the strength of wood-free papers containing high-yield pulp (HYP)

Holzforschung ◽  
2010 ◽  
Vol 64 (5) ◽  
Author(s):  
Xin Liu ◽  
Pedram Fatehi ◽  
Yonghao Ni ◽  
Huining Xiao
Keyword(s):  
Polyvinyl Alcohol ◽  
Apparent Density ◽  
Fiber Surface ◽  
Strength Properties ◽  
High Yield ◽  
Kraft Pulps ◽  
Paper Properties ◽  
Atomic Force ◽  
Tear Index ◽  
Afm Analysis

AbstractHigh-yield pulp (HYP) is gaining increasing interest in wood-free papers, because it can improve the bulk, formation, and opacity of papers. However, one of the challenges for the papermakers is the strength of papers when a large amount of HYP is replaced with hardwood kraft pulp. In this work, we explored the potential of using cationic-modified polyvinyl alcohol (C-PVA) in increasing the strength properties of HYP. Also, C-PVA was applied to the paper-sheets made of softwood/hardwood bleached kraft pulps (SBKP/HBKP) and HYP under various conditions, and the corresponding paper properties were evaluated. It was observed that C-PVA increased the strength properties of these paper-sheets, and the results obtained from using C-PVA were only slightly less effective than those obtained from using cationic starch (C-starch). Furthermore, the addition of C-PVA to HYP, and subsequently mixing with the blend of SBKP/HBKP (option no. 1) improved the tensile and burst indices, light scattering coefficient and apparent density of paper-sheets more significantly than did the addition of C-PVA directly to the mixed furnish of SBKP/HBKP/HYP (option no. 2). Additionally, atomic force microscope (AFM) analysis showed that the attraction force, developed between the AFM-tip and the fiber surface, was changed by the C-PVA modification. The tensile and burst indices of paper-sheets were improved by adding 10 mg g-1C-PVA and substituting 30% of HYP for HBKP, whereas the tear index, apparent density, PPS-roughness, and brightness decreased.

A new perspective on tissue wet strength decay: the real values

TAPPI Journal ◽  
2013 ◽  
Vol 12 (1) ◽  
pp. 9-15 ◽  
Author(s):  
F.S. POTTER ◽  
T.L. WRIGHT ◽  
C. HAGIOPOL ◽  
J.W. JOHNSTON
Keyword(s):  
Decay Rate ◽  
Wet Strength ◽  
Paper Properties ◽  
Tissue Paper ◽  
Physical Testing ◽  
Testing Data ◽  
Experimental Errors ◽  
New Perspective ◽  
The Relationship ◽  
Selection Of

The measurement of two key properties of bath tissue (paper wet strength after 5 s and 5 min of soaking in water) were performed on a broad selection of samples from retail shelves. The importance of the experimental errors and their distribution on the interpretation of the physical testing data is evaluated. Examining the data in this manner allows for a new way to look at the relationship between dry strength, initial wet strength, and the decay rate of the paper. The importance of chemistry is revealed and discussed, giving a new perspective with respect to paper properties and the strength relationships in tissue.

Sign in / Sign up

Export Citation Format

Share Document