scholarly journals Micro-Fibrillated Cellulose in Adhesive Systems for the Production of Wood-Based Panels

Molecules ◽  
2020 ◽  
Vol 25 (20) ◽  
pp. 4846
Author(s):  
Emmanouil Karagiannidis ◽  
Charles Markessini ◽  
Eleftheria Athanassiadou
Keyword(s):  
Oriented Strand Board ◽  
Chemical Compounds ◽  
Adhesive Systems ◽  
Wood Panel ◽  
Adhesive Resin ◽  
Panel Products ◽  
New Type ◽  
Board Performance ◽  
Application Fields ◽  
Composite Wood

Micro-Fibrillated Cellulose (MFC) is a new type of bio-based additive, coming from wood cellulose. It can compete and substitute oil derived chemicals in several application fields. In the present work, the use of micro-fibrillated cellulose, in waterborne adhesive systems applied in the manufacture of composite wood-based panels was evaluated. Research was conducted to test the potential of improving the performance of wood-based panel types such as particleboard, waferboard or randomly-oriented strand board and plywood, by the application of MFC and the substitution of conventional and non-renewable chemical compounds. The approaches followed to introduce MFC into the adhesive systems were three, i.e., MFC 2% suspension added during the adhesive resin synthesis, MFC 10% paste admixed with the already prepared adhesive resin and MFC 2% suspension admixed with the already prepared resin. It was found that MFC improves not only the performance of the final wood panel products but also the behaviour of the applied adhesive polymer colloids (e.g., rheology improvement), especially when admixed with the already prepared resins. Moreover, it was proven that when MFC is introduced into the adhesive resin system, there is a possibility of decreasing the resin consumption, by maintaining the board performance. MFC’s robustness to pH, shear and temperature makes it a highly interesting new additive for adhesive producers. In addition, its natural origin can give adhesive producers the opportunity to move over to more environmentally friendly product solutions.

scholarly journals A Study on A New Type 1 Half-Logistic Family of Distributions and Its Applications

2020 ◽  
Vol 8 (4) ◽  
pp. 934-949
Author(s):  
Morad Alizadeh ◽  
Alireza Nematollahi ◽  
Emrah Altun ◽  
Mahdi Rasekhi
Keyword(s):  
Residual Life ◽  
Moment Generating Function ◽  
Likelihood Method ◽  
Mean Deviation ◽  
Model Parameters ◽  
Type I ◽  
Monte Carlo Simulation Study ◽  
New Type ◽  
Application Fields ◽  
Family Of Distributions

In this paper, we propose a new class of continuous distributions with two extra shape parameters called the a new type I half logistic-G family of distributions. Some of important properties including ordinary moments, quantiles, moment generating function, mean deviation, moment of residual life, moment of reversed residual life, order statistics and extreme value are obtained. To estimate the model parameters, the maximum likelihood method is also applied by means of Monte Carlo simulation study. A new location-scale regression model based on the new type I half logistic-Weibull distribution is then introduced. Applications of the proposed family is demonstrated in many fields such as survival analysis and univariate data fitting. Empirical results show that the proposed models provide better fits than other well-known classes of distributions in many application fields.

Material-Use Trends in U.S. Furniture Manufacturing

1988 ◽  
Vol 12 (2) ◽  
pp. 102-107
Author(s):  
William G. Luppold
Keyword(s):  
Medium Density Fiberboard ◽  
The United States ◽  
Wood Products ◽  
Composite Panel ◽  
Furniture Industry ◽  
Softwood Lumber ◽  
Furniture Manufacturing ◽  
Hardwood Lumber ◽  
Panel Products ◽  
Composite Wood

Abstract Furniture manufacturers in the United States are major users of a variety of wood products. In the last two decades, traditional wood products, such as hardwood lumber, veneer, and plywood have been, in part, replaced by composite panel products, such as particleboard, hardboard, and medium-density fiberboard. This paper examines the uses of traditional and composite wood products by the wood household, upholstered household, and commercial furniture industries in descriptive and numerical terms. The analysis indicates that the substitution of composite products for traditional hardwood products has subsided in recent years in the household wood furniture industry but has continued in the commercial furniture industry. Strong growth in softwood lumber use has occurred in the household wood industry and the household upholstered furniture industry but not in the commercial furniture industry. Although hardwood lumber has been displaced by softwood-based composite panel products, greater relative decreases have occurred in hardwood veneer and veneer core plywood use because of composite panel substitution. Most recent market activities, however, indicate increased use of hardwood lumber in furniture production in the 1980s. South. J. Appl. For. 12(2):102-107.

scholarly journals The Influence of Speed and Press Factor on Oriented Strand Board Performance in Continuous Press

BioResources ◽  
2014 ◽  
Vol 9 (4) ◽  
Author(s):  
Valentina D. Ciobanu ◽  
Octavia Zeleniuc ◽  
Adela-Eliza Dumitrascu ◽  
Badea Lepadatescu ◽  
Bogdan Iancu
Keyword(s):  
Oriented Strand Board ◽  
Board Performance

scholarly journals Low VOC drying of lumber and wood panel products. Progress report number 6

1998 ◽  
Author(s):  
H. Yan ◽  
M.P. Wild ◽  
U. Hooda ◽  
S. Banerjee ◽  
R. Shmulsky ◽  
...  
Keyword(s):  
Progress Report ◽  
Wood Panel ◽  
Panel Products

scholarly journals Transfer Logic Gates With Electrical And Optical Inputs For Large Area Electronics

2015 ◽  
Vol 66 (4) ◽  
pp. 235-237
Author(s):  
Zsolt J. Horváth
Keyword(s):  
Thin Film ◽  
Logic Gates ◽  
Large Area ◽  
Thin Film Technology ◽  
Non Volatile Memory ◽  
New Type ◽  
Volatile Memory ◽  
Application Fields ◽  
Logic Functions ◽  
Large Area Electronics

Abstract A new type of transfer logic gates with both electrical and/or optical inputs and electrical outputs are proposed, which can be prepared by thin film technology. The possible realization of different logic functions and non-volatile memory logic arrays are demonstrated. The possible application fields are briefly discussed.

Effect of Different Adhesive Systems Used for Immediate Dentin Sealing on Bond Strength of a Self-Adhesive Resin Cement to Dentin

2018 ◽  
Vol 43 (4) ◽  
pp. 391-397 ◽  
Author(s):  
RC Ferreira-Filho ◽  
C Ely ◽  
RC Amaral ◽  
JA Rodrigues ◽  
J-F Roulet ◽  
...  
Keyword(s):  
Bond Strength ◽  
Testing Machine ◽  
Water Storage ◽  
Resin Cement ◽  
Control Group ◽  
Adhesive Systems ◽  
Adhesive Resin ◽  
Etch And Rinse ◽  
Adhesive Resin Cement ◽  
Self Etch

SUMMARY Objective: The purpose of this study was to investigate the immediate and three-month water storage behavior of adhesives when used for immediate dentin sealing (IDS). Methods and Materials: Four adhesive systems were used to perform IDS: a one-step self-etch (Xeno V), a two-step self-etch (Clearfil SE Bond), a two-step etch-and-rinse (XP Bond), and a three-step etch-and-rinse (Optibond FL). For the control group, IDS was not performed. The self-adhesive resin cement RelyX Unicem was used for the luting procedures. After seven days of water storage, specimens (n=6) were sectioned into beams (n=5) with an approximately 1-mm2 cross-sectional area. Half of the specimens were tested in tension after seven days of water storage at 37°C, while the other half was stored for three months prior to testing in tension using a universal testing machine (1 mm/min). The failure pattern was determined using a stereomicroscope and scanning electron microscopy. Microtensile bond strength (μTBS) data were statistically analyzed by two-way analysis of variance and Tukey post hoc test (α=0.05). Results: After seven days, the control group presented the lowest μTBS but did not differ from XP Bond and Clearfil SE Bond. After three months, there was no μTBS difference between the IDS groups and the control. Conclusions: After seven days of water storage, the groups with IDS presented higher μTBS values than the control group, although XP Bond and Clearfil SE Bond did not present significant differences. However, after three months of storage in water, IDS groups did not differ significantly from control group, which did not receive IDS.

Lateral loading performance of end narrow panel reinforced light wood frame shear walls

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Jing Di ◽  
Hongliang Zuo
Keyword(s):  
Failure Modes ◽  
Oriented Strand Board ◽  
Engineering Application ◽  
Shear Walls ◽  
Shear Wall ◽  
Element Analysis ◽  
Content Type ◽  
New Type ◽  
Wood Frame ◽  
Sheathing Panels

PurposeThe sheathing panels of traditional light wood frame shear walls mainly use oriented strand board (OSB) panels, and the damage of the traditional walls is mainly caused by the tear failure at the bottom corner of the OSB panel. In order to improve the lateral performance of the traditional light wood frame shear wall, a new type of end narrow panels reinforced light wood frame shear wall is proposed.Design/methodology/approachThe monotonic loading tests and finite element analysis of nine groups of walls, with different types of end narrow panel, types of fasteners used on the end narrow panels and the end narrow panels edge fastener spacing, are carried out. The effects of different characters on lateral performance of light wood frame shear walls are reported and discussed.FindingsThe failure modes of the wall reinforced by parallel strand bamboo narrow panels with 150 mm edge nails spacing are similar to the traditional wall. Conversely, the failure modes of other groups of walls reinforced by end narrow panels are the tears of the bottom narrow panel or the bottom beam. The end narrow panel reinforced light wood frame shear wall can make full use of the material property of sheathing panels. Compared with the lateral performance of traditional walls, the new-type end narrow panels reinforced walls have better lateral performance.Originality/valueA new type of end narrow panels reinforced light wood frame shear wall is proposed, which can enhance the lateral performance of the traditional light wood frame shear wall. The new-type walls have advantages of convenient operation, manufacture cost saving and important value of engineering application.

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