scholarly journals EMBALAGENS CARTONADAS COMO MATÉRIA-PRIMA NA FABRICAÇÃO DE COMPÓSITOS

Nativa ◽  
2018 ◽  
Vol 6 (2) ◽  
pp. 177
Author(s):  
Talita Baldin ◽  
Maiara Talgatti ◽  
Amanda Grassamann da Silveira ◽  
Bruna Gabrieli Resner ◽  
Elio José Santini
Keyword(s):  
Mechanical Properties ◽  
Physical Properties ◽  
Internal Bond ◽  
Urea Formaldehyde ◽  
Eucalyptus Grandis ◽  
Raw Material ◽  
Thickness Swelling ◽  
Wood Particles ◽  
Sustainable Materials ◽  
Waste Particles

O objetivo do presente trabalho foi avaliar o potencial de uso de partículas de resíduos de embalagens cartonadas e partículas de Eucalyptus grandis para a fabricação de compósitos, colados com adesivo à base de ureia-formaldeído. Foram utilizadas cinco diferentes proporções de madeira de E. grandis e embalagens cartonadas. As partículas de madeira e embalagens cartonadas foram produzidas em laboratório. A avaliação da qualidade dos compósitos envolveu a caracterização da geometria das partículas, das propriedades físicas: massa específica básica, teor de umidade de equilíbrio, absorção de água e inchamento em espessura após 2 e 24 horas de imersão em água e das propriedades mecânicas: flexão estática (MOE e MOR), resistência ao arrancamento de parafuso, ligação interna e dureza Janka. A incorporação de partículas de embalagens cartonadas proporcionou uma melhoria nas propriedades físicas em relação aos compósitos puros de madeira. Já para as propriedades mecânicas, compósitos com até 50% de embalagens cartonadas obtiveram melhores resultados, no entanto, a incorporação a partir de 75% ocasionou decadência nessas propriedades. Compósitos de madeira de E. grandis e embalagens cartonadas apresentaram potencial para utilização em ambientes internos e podem ser uma alternativa para a produção de compósitos sustentáveis e de boa qualidade.Palavra-chave: materiais sustentáveis, propriedades físicas e mecânicas, ureia-formaldeído. CARTONBOARD PACKAGING AS A RAW MATERIAL IN THE MANUFACTURE OF COMPOSITES ABSTRACT:The aim of this study was to evaluate the potential waste particles use of carton packaging and particles of E. grandis for the manufacture of particle boards, bonded with urea-formaldehyde-based adhesive. Five different proportions of E. grandis wood and cartons have been used. The wood particles and cartons were produced in the laboratory. The quality assessment panels involved characterizing the geometry of the particles, the physical properties: specific gravity, equilibrium moisture content, water absorption and thickness swelling after 2 and 24 hours of immersion in water and mechanical properties: flexural static (MOR and MOE), resistance to screw pullout, internal bond and Janka hardness. The incorporation of particulate cartons provided an improvement in physical properties relative to pure wood panels. As for the mechanical properties, panels of up to 50 % of cartons obtained best results, however, incorporating from 75 % decay caused these properties. The wood particleboard of E. grandis and cartons showed potential for use indoors and become an alternative for producing sustainable panels and of good quality.Keywords: sustainable materials, physical-mechanical properties; urea-formaldehyde. DOI:

Thermomechanical (TMP) and Chemo-Thermomechanical Pulps (CTMP) for Medium Density Fibreboards (MDF)

Holzforschung ◽  
2001 ◽  
Vol 55 (2) ◽  
pp. 214-218 ◽  
Author(s):  
Edmone Roffael ◽  
Brigitte Dix ◽  
Thomas Schneider
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Internal Bond ◽  
Urea Formaldehyde ◽  
Medium Density ◽  
Thickness Swelling ◽  
Negative Effect ◽  
Pilot Plant Scale ◽  
Drying Conditions ◽  
Internal Bonding Strength

Summary Thermomechanical (TMP) and chemo-thermomechanical pulps (CTMP) were prepared from spruce under different pulping conditions. The fibres were dried at 70 °C and medium density fibreboards (MDF) were made therefrom in pilot plant scale using urea-formaldehyde resins as a binder. The results of testing the physical-mechanical properties reveal that the pulping temperature has a significant influence on the thickness swelling and water absorption of the boards. MDF prepared from fibres produced at high pulping temperature (180 °C) generally show lower thickness swelling and water absorption than MDF made from fibres produced at low pulping temperature (140°C and 160 °C). However, high pulping temperature may have a negative effect on the internal bond strength of the boards. In general, CTMP leads to MDF with higher internal bonding strength compared to those derived from TMP. In addition, the influence of different drying conditions (150 °C and 170 °C) of TMP and CTMP on the physical-mechanical properties of MDF was assessed. MDF made from CTMP showed lower thickness swelling when dried under high temperature.

Dimensional stability and mechanical properties of bio-based composites produced from hydro-thermal treated wheat straw

BioResources ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. 7901-7915
Author(s):  
Ümit Büyüksarı ◽  
Ömer Özyürek
Keyword(s):  
Mechanical Properties ◽  
Thermal Treatment ◽  
Wheat Straw ◽  
Dimensional Stability ◽  
Internal Bond ◽  
Steam Explosion ◽  
Modulus Of Rupture ◽  
Thickness Swelling ◽  
Wood Particles ◽  
Particle Ratio

Bio-composites were produced from untreated (UT) and hydro-thermally treated (HTT) wheat straw (WS) particles and wood, and their dimensional stability and mechanical properties were investigated. The HTT treatment consisted of subjecting the WS particles to a steam explosion process for 8 min at 180 °C. The HTT and UT WS particles were mixed with the wood particles at 10, 20, 30, and 40% ratios. The physical properties, including density, water absorption (WA), and thickness swelling (TS), were determined for the bio-based composites. The mechanical properties evaluated included the modulus of rupture, modulus of elasticity, and internal bond strength. Statistical analyses showed that the hydro-thermal treatment and the WS ratio had significant effects on the dimensional stability and mechanical properties of the bio-composites. The WA of the composites after 2-h and 24-h rose significantly when the HTT WS particle ratio was increased from 10 to 40%. The 2-h and 24-h WA values of HTT-10 were 6.3% and 5.3% lower than those of UT-10, respectively. Improvements in the 2-h TS value were achieved by the HTT WS particles at the 10% ratio, and in the 24-h TS value at the 10 and 40% ratios. The mechanical properties of the composites were higher in the HTT group, but decreased in both the UT and HTT groups as the WS ratio increased.

Feasibility of Using MDP Panels, Compared to Conventional Particleboards

2015 ◽  
Vol 668 ◽  
pp. 145-149
Author(s):  
Bárbara Maria Ribeiro Guimarães ◽  
José Benedito Guimarães Jr. ◽  
Jefferson Barbosa Campomori ◽  
Rafael Farinassi Mendes ◽  
Lourival Marin Mendes
Keyword(s):  
Physical Properties ◽  
Water Absorption ◽  
Urea Formaldehyde ◽  
Raw Material ◽  
Thickness Swelling ◽  
Gel Time ◽  
Pressing Cycle ◽  
Base Resin ◽  
Solids Content

The objective of this study was to investigate, by physical properties, the efficiency of MDP panels, compared to conventional particleboards, since MDP was considered as a raw material for the manufacture of these panels. MDP panels had the following composition: 20/60/20 face/core; a urea-formaldehyde adhesive was used, with a solids content of 55%; pH 8.42; viscosity of 420 Cp and gel time of 51 seconds. 12% of dry base resin were applied to the particles. The pressing cycle was 4 MPa, with a temperature of 160°C for a period of 8 minutes. The panels were produced with a density of 0.70g/cm3. We observed that with the exception of the physical properties of water absorption after 2 hours, the MDP showed lower physical properties (water absorption after 24 hours and thickness swelling after 2 hours and 24 hours of immersion in water) in relation to the panels conventional clusters. Thus demonstrating its superiority in relation to the physical properties of MDP compared to conventional agglomerated panels, emphasizing their use in this way.

scholarly journals Influence of Adding Offcuts and Trims with a Recycling Approach on the Properties of High-Density Fibrous Composites

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1327
Author(s):  
Conrad M. Sala ◽  
Eduardo Robles ◽  
Grzegorz Kowaluk
Keyword(s):  
Mechanical Properties ◽  
Bond Strength ◽  
Water Absorption ◽  
Internal Bond ◽  
High Density ◽  
Raw Material ◽  
Internal Bond Strength ◽  
Fibrous Composites ◽  
Thickness Swelling ◽  
Linear Decrease

The sizeable global production of wood-based products requires new sources of raw material, but also creates large quantities of wastes or composites that do not comply with requirements. In this study, the influence of different shares of recovered high-density fiberboards (HDF-r), reversed into the production, on industrial HDF properties, has been examined. HDF-r may be a suitable partial substitute for raw pinewood for industrial HDF production. Although most of the mechanical properties, as well as thickness swelling and water absorption, had a linear decrease with the increase in the share of HDF-r share, the elaborated boards met most of the commercial requirements (EN 622-5). The property that did not meet the requirements was the internal bond strength for panels with 10% of HDF-r. The presented results show that, after some adjustments, it should be possible to produce HDF boards with up to 10% of recycled HDF being able to meet all commercial requirements.

scholarly journals PERFORMANCE OF TWO TYPES OF CEMENT IN PRODUCTION OF CEMENT BONDED WOOD PANELS COMBINED WITH RICE HULL

FLORESTA ◽  
2014 ◽  
Vol 44 (4) ◽  
pp. 715
Author(s):  
Rafael Da Rosa Azambuja ◽  
Daniela Silva Lilge ◽  
Elio José Santini ◽  
Clovis Roberto Haselein
Keyword(s):  
Mechanical Properties ◽  
Internal Bond ◽  
Agricultural Waste ◽  
Eucalyptus Grandis ◽  
Pinus Elliottii ◽  
Modulus Of Rupture ◽  
Rice Hull ◽  
Rice Hulls ◽  
Wood Panels ◽  
Wood Particles

AbstractPERFORMANCE OF TWO TYPES OF CEMENT IN PRODUCTION OF CEMENT BONDED WOOD PANELS COMBINED WITH RICE HULLThe objective of this study was to evaluate the performance of two types of cement in the manufacturing of cement bonded wood panels with addition of rice hull. Sealers used were cement V-ARI (CP V) and cement Portland IV, pozzolanic (CP IV). Proportions adopted in the composition of panels were 0, 50 and 100 % rice hulls combined with 100, 50 and 0% of wood particles. Species used in this study were Eucalyptus grandis and Pinus elliottii. Parameters considered to evaluate panels were the mechanical properties. CP IV did not cure with the addition of pine particles in any proportion. The values of modulus of rupture (MOR) were higher with CP IV, but with the addition of rice hulls they decreased. CP V shoved higher internal bond strength in all proportions studied. Addition of rice hulls decreased all the mechanical properties studied in this work, therefore its use in cement bonded wood panels must be controlled, larger quantities than 50% of total vegetal mass weight are not recommended. Using Bison process as a reference, CP IV presented the necessary requirements to be used in cement bonded wood panels.Keywords: Eucalyptus grandis; CP IV; CP V-ARI; agricultural waste. ResumoDesempenho de dois tipos de cimentos na produção de painéis cimento madeira combinados com casca de arroz. O objetivo deste trabalho foi avaliar o desempenho de dois tipos de cimento na manufatura de painéis cimento madeira com adição de casca de arroz. Os cimentos avaliados foram o cimento Portland V - ARI (CP V) e o cimento Portland IV, pozolânico (CP IV). As proporções usadas na composição dos painéis foram de 0, 50 e 100% de casca de arroz combinadas com 100, 50 e 0% de partículas de madeira, sendo as espécies utilizadas Eucalyptus grandis e Pinus elliottii. Os parâmetros utilizados para avaliar os painéis foram as propriedades mecânicas. O CP IV não foi capaz de curar com a adição das partículas de pinus em nenhuma proporção. Os valores de módulo de ruptura (MOR) foram maiores com o CP IV, porém com adição de casca de arroz estes foram decrescendo. O CP V apresentou maiores valores de ligação interna para todas as proporções estudadas. A adição da casca de arroz diminuiu todas as propriedades estudadas neste trabalho portanto a sua utilização em painéis cimento madeira deve ser controladas e não aconselhadas em quantidades maiores que 50% do peso da massa vegetal utilizada. Usando o processo Bison como referência, o CP IV apresentou os requerimentos necessários para uso como painéis cimento madeira.Palavras-chave: Eucalyptus grandis; CP IV; CP V-ARI; resíduo agrícola.

scholarly journals Effect of Particle Length to the Quality Particleboard Made from Sorghum Bagasse

2018 ◽  
Vol 1 (1) ◽  
pp. 16-23
Author(s):  
Apri Heri Iswanto ◽  
Dita Sari Prabuningrum ◽  
Irawati Azhar ◽  
Supriyanto Supriyanto
Keyword(s):  
Mechanical Properties ◽  
Moisture Content ◽  
Internal Bond ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Thickness Swelling ◽  
Japanese Industrial Standard ◽  
Uf Resin ◽  
Sorghum Bagasse ◽  
Particle Length

The objective of this research was to evaluate the effect of length size particle on physical and mechanical properties of particleboard. Sorghum bagasse was cut into 3, 5, and 7 cm length size. Furthermore, particles were dried until reached of4% moisture content. Amount of 10% urea-formaldehyde (UF) resin used for binding. Hot pressing process conducted in 130C temperature for 10 minutes and 30 kg cm -2 pressure. The results showed that thickness swelling (TS) and internal bond (IB) did not fulfill of requirement of Japanese Industrial Standard (JIS) A 5908 (2003). According to all parameters, 3 cm length size of particle was resulting in the best properties.

scholarly journals Oversized Planer Shavings for the Core Layer of Lightweight Particleboard

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1125
Author(s):  
Jakob Gößwald ◽  
Marius Cătălin Barbu ◽  
Alexander Petutschnigg ◽  
Ľuboš Krišťák ◽  
Eugenia Mariana Tudor
Keyword(s):  
Mechanical Properties ◽  
Internal Bond ◽  
Urea Formaldehyde ◽  
Core Layer ◽  
Solid Wood ◽  
Raw Material ◽  
Modulus Of Rupture ◽  
Low Density ◽  
The Core ◽  
Adhesive Application

Planer shavings (PS) are side-products generated during the processing of solid wood, typically used for heating, packaging, or insulation purposes. PS has been used for decades in particleboard manufacture, particularly in the core layer. The aim of this research is to investigate the use of PS with a length over 4 mm in low-density one-layer particleboard manufacturing with a thickness of 10 mm, as an option to reduce the raw material demand for wood-based panels. Correlations towards the mechanical properties of the particleboards, fabricated at a density of 475 kg/m3, could be drawn by analyzing the effects of different urea-formaldehyde adhesive contents (6%, 9%, and 12%). Two methods of adhesive application (pouring and spraying) and two types of blending of PS with adhesive (plowshare mixer and drum mixer) were investigated, with the aim that PS will have controlled resin application. The difference between the adhesive application methods was examined by analyzing the mechanical properties as an internal bond, modulus of rupture, and modulus of elasticity as well as indirectly by visualizing the adhesive distribution by adding a green pigment to the adhesive before application. PS demonstrated reduced bending properties in comparison with the EN 312 standard requirements of particleboards for internal use in dry conditions (type P2), due to the low density. The internal bond strength in the case of the particleboard without pigment application (up to 0.5 N/mm2) was higher compared to the P2 requirements (0.4 N/mm2), and significantly lower (0.15 N/mm2) in combination with the pigment (2.5% based on the board weight, compared to 0.1%, specific for such industry applications), but still superior to the values of the reference panel manufactured with wood particles.

scholarly journals Utilization of Pitali (Trewia nudiflora) for Manufacturing Commercial Plywood in Bangladesh

1970 ◽  
Vol 43 (4) ◽  
pp. 581-587
Author(s):  
M Hasan Shahria ◽  
M Ashaduzzaman ◽  
M Iftekhar Shams ◽  
Arifa Sharmin ◽  
M Muktarul Islam
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Moisture Content ◽  
Physical Properties ◽  
Water Absorption ◽  
Linear Expansion ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Thickness Swelling ◽  
Trewia Nudiflora

The study was conducted to find out the potentiality of Pitali (Trewia nudiflora) for manufacturing commercial plywood and evaluating its physical and mechanical properties. Two 9-ply plywood of 2.4m x 1.2m x 18mm size were manufactured using liquid urea formaldehyde adhesive. The physical and mechanical properties of T. nudiflora plywood were compared with the existing market available plywood manufactured by Simul (Bombax ceiba). It was found that density were 509.82 kg/m3 and 490.96 kg/m3, moisture content after curing were 10.67% and 17.61%, thickness swelling were 6.90% and 7.29%, linear expansion were 0.19% and 0.15%, water absorption were 50.89% and 64.79%, MOR were 29.94 N/mm2 and 27.05 N/mm2, MOE were 1613.89 N/mm2 and 1160.68 N/mm2, and tensile strength were 14.75 N/mm2 and 13.12 N/mm2 for T. nudiflora plywood and market plywood respectively. The evaluated physical and mechanical properties of T. nudiflora plywood were also compared with some relevant results and standards reported earlier. Key Words: Plywood, Trewia nudiflora, Physical properties, Mechanical properties. doi: 10.3329/bjsir.v43i4.2249 Bangladesh J. Sci. Ind. Res. 43(4),581-587, 2008

The possibility of using bacterial cellulose in particleboard technology

2020 ◽  
Vol 109 ◽  
pp. 16-23 ◽  
Author(s):  
Błażej Wacikowski ◽  
Michał Michałowski
Keyword(s):  
Mechanical Properties ◽  
Bacterial Cellulose ◽  
Internal Bond ◽  
Technical Specification ◽  
Raw Material ◽  
Modulus Of Rupture ◽  
Wood Particles ◽  
Minimum Requirements ◽  
Reduced Density ◽  
Effective Growth

The possibility of using bacterial cellulose in particleboard technology. The paper presents the results of the influence of bacterial cellulose multiplication on industrial pine particles (used in wood materials technology), and then the use of the obtained biomass in the production of particleboards with reduced density LP1 type. Based on previous preliminary studies it was determined that the most effective growth of bacterial cellulose occurs using 5% wood particles in the breeding mixture. Two series of particleboards were produced: control and containing bacterial cellulose. Selected mechanical properties of produced particleboards (modulus of rupture, modulus of elasticity and internal bond) and selected physical properties (swelling and water absorption after 2 and 24 hours of soaking in water) were determined in turn. The boards made with bacterial cellulose had lower MOR and MOE values. Swelling after 2 and 24 hours was lower for boards with bacterial cellulose. The presented tests allow to state that bacterial cellulose can be a potential raw material ingredient in the production of particleboard while meeting the minimum requirements of the technical specification for boards with reduced density LP1.

Some properties of particleboard panels treated with extractives of Cerbera odollam tree

2010 ◽  
Vol 45 (8) ◽  
pp. 901-906 ◽  
Author(s):  
Rokiah Hashim ◽  
Mohd Hazim Mohd Amini ◽  
Othman Sulaiman ◽  
Salim Hiziroglu ◽  
Fumio Kawamura ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Internal Bond ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Insect Damage ◽  
Thickness Swelling ◽  
Resorcinol Formaldehyde ◽  
Wood Bark ◽  
European Standards ◽  
Different Parts

This study investigated certain aspects of physical and mechanical properties and resistance against biological deterioration of particleboard panels treated with extractives from different parts of Cerbera odollam trees. Particles of rubber-wood ( Hevea brasiliensis) treated with extracts of leaf, fruit, wood, bark, flower, and seed of Cerbera odollam were used to manufacture panels in laboratory conditions. Two types of adhesive, namely melamine urea formaldehyde and phenol resorcinol formaldehyde were used as binder for the panels. Treated panels had higher resistance against powder post beetle in laboratory as well as field exposures. Both thickness swelling and internal bond strength values of treated samples satisfied requirements for P4 Type particleboards stated in European Standards (EN 312). It appears that such extractives possess potential to enhance resistance of particleboard against insect damage in tropical countries.

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