Particleboard Research Papers - Academia.edu (original) (raw)

This study was aimed at the application of keratin-modified-urea-formaldehyde (KMUF) resin adhesive for bonding particleboard. The keratin extract was used in developing the urea- formaldehyde resin. The physicochemical properties of the resins which included viscosity, gel time, specific gravity, pH and total solid content of the modified resins were determined. The application of the resin adhesives was done by formulating and forming particle board whose compositions were 80% wood chips, 11% resins and moisture content of approximately 9%.The boards were evaluated for their mechanochemical and water resistance properties. These properties of KMUF boards were compared with that of neat urea-formaldehyde (NUF) board. The results of the characteristics properties of the particleboards showed that KMUF gave improved strengths and better water resistance properties than the NUF board. Key word: Keratin,application, bonding resin,adhesive, particleboard.

- by
- •
- Materials Science, Adhesive, Keratin, Bonding

The purpose of present study was to fabricate particleboard using almond shell. This might help to overcome the raw material shortage that the panel industry is facing now days. Particleboards containing different almond shell particle ratios were made using epoxy resin. Tensile properties of almond shell particleboards were determined in this research paper. The addition of almond shell particles greatly affected the tensile property of the panels. Hardness is very important property for the particle board. In the present, investigation tensile strength of fabricated particle board decreases with increase in the almond shell particles.

- by Arun Kumar Chaudhary
- •
- Materials Science, Mechanical properties, Particleboard, Resin

The objective of this work was to evaluate properties of experimental particleboard panels manufactured from oil palm (Elais guineensis) trunks and Acacia mangium. Samples were made having five different ratios of two types of raw materials without using any adhesives. Both physical and mechanical properties of the specimens were evaluated based on Japanese Industrial Standards (JIS). Panels made with 100% oil palm particles had the highest modulus of rupture and internal bond strength values of 22.91% MPa and 0.59 MPa, respectively. Addition of A. mangium particles in the panels adversely influenced their mechanical properties while improved both thickness swelling and water absorption of the specimens. All panels made in this work met minimum strength requirements stated in JIS. Based on the findings in this work it appears that both types of underutilized species could have a potential to be used as raw material to manufacture binderless value-added panels.

- by MOHD FAHMI Awalludin and +2
- •
- Palm oil Products, Green Construction, Green Technology, Particleboard

The objective of this work was to evaluate the effect of the addition of bamboo laminas of the species Dendrocalamus giganteus to three-layer medium density particleboard (MDP). These laminas were glued onto both the top and the bottom of each panel. With the manufactured panels laminated with bamboo, mechanical tests based on the Brazilian Standard ABNT NBR 14810 were carried out to determine the modulus of rupture (MOR) in static bending and the tensile strength parallel-to-surface. These mechanical tests were realized in particleboards of eucalyptus and in reinforced particleboard, both produced in the laboratory. The modulus of rupture and tensile strength parallel-to-surface of the laminated MDP had values close to those that have been reported. The reinforcements increased the values of these studied properties. Nevertheless, this fact indicated the possibility to produce a stronger MDP using bamboo lamina as surface layers. These results show the possibility of using coated-b...

- by Francisco Antonio Rocco Lahr and +1
- •
- Composite Materials and Structures, Composites, Composite Materials, Mechanical Behavior Of Materials
- by Norani Abd Karim
- •
- Particleboard, Sugarcane Bagasse, Binderless Particleboard

Novel composite materials having desired performance properties can be developed by nanotechnology. The major objective of this research was to produce nanomaterial-reinforced particleboard composites with enhanced physical and mechanical performance. Urea formaldehyde adhesive used to produce particleboard composites was reinforced with nanoSiO2, nanoAl2O3, and nanoZnO at loading level of 0%, 1%, and 3%. To evaluate physical properties density, thickness swelling, water absorption, and equilibrium moisture content were determined while modulus of rupture, modulus of elasticity, bonding strength, and screw withdrawal strength tests were carried out to evaluate mechanical properties of the particleboard composites. The results acquired in this work revealed that nanomaterial reinforcement technique significantly affected the physical and mechanical performance properties of the particleboard composites. The findings showed that the modulus of rupture, modulus of elasticity, bonding s...

- by Turgay AKBULUT
- •
- Wood Science, Timber, Nanoparticles, Nanotechnology

This study was aimed at the application of keratin-modified-urea-formaldehyde (KMUF) resin adhesive for bonding particleboard. The keratin extract was used in developing the ureaformaldehyde resin. The physicochemical properties of the resins which included viscosity, gel time, specific gravity, pH and total solid content of the modified resins were determined. The application of the resin adhesives was done by formulating and forming particle board whose compositions were 80 % wood chips, 11 % resins and moisture content of approximately 9%.The boards were evaluated for their mechanochemical and water resistance properties. These properties of KMUF boards were compared with that of neat urea-formaldehyde (NUF) board. The results of the characteristics properties of the particleboards showed that KMUF gave improved strengths and better water resistance properties than the NUF board.

- by PAUL DIM
- •
- Adhesive, Keratin, Bonding, Particleboard

Mechanical characteristics were evaluated of wood-bamboo-based particleboard having the proportions of 100% wood and 0% bamboo, 75% wood and 25% bamboo, and 50% wood and 50% bamboo. This particleboard used Eucalyptus urophylla × grandis wood, Dendrocalamus asper bamboo, and castor oil-based polyurethane resin. Through destructive testing, the values of perpendicular tensile, static bending, modulus of elasticity, and screw pullout strength in the top and face surfaces were analyzed. For 0%, 25%, and 50% bamboo the values were 1.68 MPa, 1.37 MPa, and 1.4 MPa, respectively, for perpendicular tensile; 15.2 MPa, 17.6 MPa, and 18.5 MPa, respectively, for static bending; 2466 MPa, 2694 MPa, and 2922 MPa, respectively, for modulus of elasticity; 1256 MPa, 1922 MPa, and 1362 MPa, respectively, for screw pullout strength in top; and 1392 MPa, 1342 MPa, and 1414 MPa, respectively, for screw pullout strength in face. These results were superior to those presented by ABNT NBR 14810 (2013) and ANSI 208.1 (1999). After performing a Tukey test at 5%, the values for each treatment did not show a significant difference among them.

- by Victor De Araujo
- •
- Wood Science, Prefabricated wood, Bamboo, Lignocellulose

The focus of this research was to study the utilization of residues from bamboo (Dendrocalamus giganteus) lamination in the manufacturing of panels for structural purposes. Bamboo particleboards were produced under three conditions: pure boards, reinforced with bamboo laminas, and with treated particles. Castor oil-based polyurethane was the resin binder, in view of using lower toxicity materials. The mechanical tests were performed according to Brazilian Standard (NBR) 14810-3 (2006) and European Standard (EN) 310 (2000). The results were superior to those recommended by these and other standards for internal adhesion resistance, modulus of rupture, and elasticity in static bending, as well as to the results of other studies. Starch treatment was an unnecessary stage. According to the conditions of this process, the studied panels showed a good potential for construction use. Moreover, the bamboo particleboards are an economically viable, environmentally friendly, and sustainable alternative for the use of waste generated during the processing of Dendrocalamus giganteus bamboo species, allied with castor oil-based polyurethane resin. The reinforced particleboard and its production process are being licensed as an Innovation Patent in Brazil, (BR 1020130133919-1-2013).

Waste of mahogany leaf and sengon sawdust are very abundant. It's lignocelluloses material that can be used as raw materials for the manufacture of particle board. The objective of the research was to evaluate the effect of variations in the composition of mahogany leaf and sengon sawdust from timber industry using urea-formaldehide resin. The compotition between mahogany leaf and sengon sawdust were 100% : 0% , 75% : 25% , 50% : 50% and 25% : 75%. UF resin was used as the adhesive in the amount of 10%. UF resin was added with hardener form solution of NH4Cl 20%(w/v) as much as 1% and 3%. The dimension of sample test was 25x25x1 cm 3 with a density target of 0,8 g/cm 3. The particleboards were tested to determine their physical and mechanical properties according to JIS A 5908-2003. The result showed that 75% : 25% with NH4Cl 20%(w/v) as much as 3% and 50% : 50% with NH 4 Cl 20%(w/v) as much as 1% resulted in the best physical and mechanical properties. But, quality of mechanical properties of the particleboard did not fulfill JIS A 5908-2003.

- by jan heri and +1
- •
- Particleboard

The objective of the study was to investigat
e p
hysical and mechanical
properties of experimental particleboard panels manufactured from oil
palm (
Elaeis guineensis
) biomas
s without using any adhesives.
Different
parts of oil palm
,
including
the
core and mid sections of trunks, fronds,
bark, and leaves
,
were used to make the panels with an average target
density of 0.80g/cm
3
.
Based on the test results
,
it seems that panels
made from bark and leaves did not have satisfactory strength and
dimensiona
l stability. However, the panels having particles from
the
core
portion of the trunks exhibited the highest modulus of rup
tur
e and
internal bond strength
but
lowest
in
thickness swelling and water
abso
rption values among the samples
.
The panels made with p
articles of
mid
-
section of trunks and fronds followed the samples having
core
portion trunks material.
Three types of ra
w material, namely fronds, mid
-
,
and
core
-
parts of the trunks appeared as though
they could have
potential to manufacture particleboard
panels with acceptable properties
based on requirements stated in Japanese Industrial Standard (JIS).
Similar to
the
above findings
,
surface quality of the samples were also
found acceptable for the panels made from three types of particles.
Based on the r
esults of this work, oil palm in the form of biomass could
be considered as
an
environmentally friendly alternative raw material to
manufacture binderless particleboard panels.

- by Wan Noor Aidawati Wan Nadhari
- •
- Biomass, Palm Oil, Particleboard, Binderless Fiberboard

The properties of an experimental particleboard made from rubberwood using carboxymethyl starch as a binder were evaluated for its mechanical and physical properties. Carboxymethyl starch was prepared by chemically modifying oil palm trunk starch with phosphoryl chloride. The panels produced were based on two target densities of 0.60 g/cm3 and 0.80 g/cm3 and four different types of binders, which were native starch, carboxymethyl starch, carboxymethyl starch mixed with 2% urea formaldehyde and urea formaldehyde as controlled samples. The starch was evaluated using X-ray diffractometry, fourier transform infrared spectroscopy, scanning electron microscopy, thermogravimetric analyzer, and differential scanning calorimetry. The specimens with a density of 0.80 g/cm3 made using carboxymethyl starch showed an improvement in term of physical and mechanical strength compared to the panels bonded with native starch. The improvements in the properties of the panels were observed on the panels bonded using mixed binders which successfully achieved the minimum value specified by the standard.

- by Wan Noor Aidawati Wan Nadhari and +1
- •
- Starch, Palm Oil, Particleboard, Binderless Fiberboard

The effects of posttreatments of particle-board adhesive-type urea–formaldehyde resins were studied. The resins were synthesized with formaldehyde/first urea (F/U 1) mol ratios of 1.40, 1.60, 1.80, 2.10, and 2.40 and then the second urea was added to give a final formalde-hyde/urea ratio of 1.15 in alkaline pH. The resins were posttreated at 60°C for up to 13.5 h and the 2.5-h heat-treated resin samples were stored at room temperature for up to 27 days. Resins sampled during the posttreatments were examined by 13 C-NMR and evaluated by bonding particleboards. In the posttreatments, hydroxymethyl groups on the poly-meric resin components dissociated to formaldehyde and reacted with the second urea, and methylene and methyl-ene– ether groups were formed from reactions involving the second urea. Methylene– diurea and urea groups bonded to UF polymers were identified. As a result, the viscosity of the resins initially decreased but later increased along with the cloudiness of the resins. Bond-strength and formaldehyde-emission values of particleboard varied with posttreatment variables as well as with the F/U 1 mol ratios used in the resin syntheses. The results would be useful in optimizing resin synthesis and handling parameters. Various reaction mechanisms were considered.

- by Young No and +2
- •
- Polymer Chemistry, Wood Science, NMR Spectroscopy, Wood Adhesives

The aim of this study was to evaluate the effect of different radial regions of Pinus oocarpa wood on the physical and mechanical properties of particleboard panels. Three different radial regions (internal, intermediate and external) and the mixture (integral log) were assessed. Experimental panels were produced with a nominal density of 0.70 g/cm 3 using 8% urea-formaldehyde adhesive; they were compressed at a specific pressure of 40 kgf/cm 2 and temperature of 160 °C, for 8 minutes. Wood radial position affected particleboard quality and a direct influence of the chemical composition and density of the material used was observed. Only the panels produced the mixture (integral log) and with the internal region met all the requirements stipulated by the marketing standard.

- by Floresta Ambiente
- •
- Particleboard, Physical and Mechanical Properties, radial regions

- by Victor De Araujo and +3
- •
- Composite Materials and Structures, Composites, Wood Science, Composite Materials

- by Maristela Gava
- •
- Materials Science, Wood Science, Prefabricated wood, Bamboo

In this study, some characteristics of Rhizophora spp. particleboards bonded with Serishoom (traditional animal–based adhesive) as a phantom material was investigated. The Rhizophora spp. particleboards were fabricated in two Serishoom adhesive treatment levels (6% and 12%) with three Rhizophora spp. particle sizes (≤ 149 µm, 149 µm – 500 µm, and 500 µm – 1000 µm) at 1 g.cm-3 of the target density. The internal bond strength and the dimensional stability of the Serishoom-bonded Rhizophora spp. particleboards were improved by using the smaller Rhizophora spp. particle size and the higher Serishoom adhesive treatment level. The effective atomic numbers of the Serishoom-bonded Rhizophora spp. particleboards were determineted to be 7,56 to 7,58 by an energy dispersive X-ray, which is in good agreement with those of water and breast tissue. In addition, the density distribution profiles of the fabricated Serishoom-bonded Rhizophora spp. particleboards were determined by the Kriging method with the use Surfer8 computer software, which indicated that there was good density homogeneity throughout the Serishoom-bonded Rhizophora spp. particleboards. The results showed a potential of the Serishoom-bonded Rhizophora spp. particleboard bonded with Serishoom to be used as a phantom material.

- by Ehsan Taghizadeh Tousi and +1
- •
- Wood Plastic Composite, Wood Science, Timber, Wood chemistry

- by Maderas. Ciencia y Tecnologia
- •
- Wood Science, Timber, Nanoparticles, Nanotechnology
- by Ifath Arsyad
- •
- Skripsi, Wood Adhesives, Hot Pressing, Particleboard

This paper evaluates the utilization of Ethiopian lowland bamboo or Oxytenanthera abyssinica to manufacture a particleboard. Two boards were tested; one of the boards was fully manufactured from bamboo and the other one was taken from market, which is mostly utilized by those household factories and other wood product manufacturers who use particleboard, fully manufactured from Eucalyptus tree. The particles were bonded using 10% urea formaldehyde. Compression tests were conducted for the two types of particleboards as per Japanese Industrial standard (JIS A 5908) both under wet and dry conditions. A total number of four samples were taken from each type and tested along the width and length on HUALONG universal testing machine with a loading rate of 10mm/min. During the test the upper surfaces of the specimens were under compression and the lower sides were under tension. The results from both tests have shown that the lowland bamboo can be a good candidate for particleboard manufa...

- by Hailu Shimels
- •
- Bamboo, Reserch, Particleboard, Oxytenanthera abyssinica

The main weaknesses of particleboard are that it has a lower strength and a lower dimensional stability compared to solid wood. Therefore, in order to gain excellent properties prior to be used, it needs some treatments, i.e., resin thermoplastic laminated. The objectives of this study were to improve the physical and mechanical properties of rubber wood particleboard laminated with low density ethylene (LDPE) resin. Rubber wood particleboard was laminated with 4 different concentrations of LDPE resins (i.e., 5, 10, 15, and 20%). The physical and mechanical properties of board were evaluated both in dry and wet states. The results indicated that the dimensional stability of board after laminated with LDPE resin showed significant improvement in term of water absorption and thickness swelling. Modulus of rupture and srew resistant of resulted particle board were increased with addition of LDPE resin. Modulus of elasticity and surface hardness of the particleboard were slightly decreased with addition of LDPE resin. The intenal bond was unchanged. The best treatment was found on lamination the surface of particleboard with 5% LDPE resin. All the physical and mechanical properties of particleboard laminated with 5% LDPE resin met the requirements of JIS A 5908-2003 standard.

- by Wahyu Hidayat
- •
- Particleboard, Low Density Polyethylene, Dimensional Stabilization
- by Wan Noor Aidawati Wan Nadhari
- •
- Palm oil Products, Palm Oil, Phenolic Compounds, Particleboard

An increase in demand on solid wood that is insufficient supply to meet in the world necessarily directed to other engineering materials that could be an alternative to the solid wood. In this context, instead of using solid wood in furniture and construction industry, wood-based panels such as medium density fiberboard (MDF) and particleboard (PB) have become widely used as construction material. Limited research has been done in the field of fastener performance as mechanical properties with different parameters in the joints constructed with these panels. Therefore, in this study, the parameters of screw type, pilot hole, screw orientation, water treatment and adhesives were investigated in MDF and PB. The results indicated that the highest direct screw withdrawal (DSW) resistance was observed in the test blocks applied with PU and the lowest DSW resistance was in the test blocks without a pilot hole drilled in both materials. In addition, MDF in general had better DSW resistance than PB in almost all combinations of the parameters. The treatment of water into MDF and PB test blocks negatively affects the DSW resistance. The DSW resistance in the face orientation was found to be higher than the corresponding ones in the side orientation in both materials.

- by Maderas. Ciencia y Tecnologia
- •
- Wood Science, Wood Composite, Timber Engineering, Wood Technology

Abstract Binderless particleboard panel made from sugarcane (Saccharum officinarum L.) bagasse was manufactured by using waste product of sugarcane. The target density, pressing temperature, pressing time and pressing pressure used were 0.8 g/cm3, 180 °C, 10–40 min and 12 Mpa respectively. Modulus of rupture, internal bonding strength, thickness swelling and water absorption of the boards were evaluated based on Japanese Industrial Standards (JIS A 5908: Particleboards). From this research, the 30 min pressing time panel had the highest modulus of rupture (MOR) and modulus of elasticity (MOE) values which were 15.16 Mpa and 1710 MPa respectively. Panels made from sugarcane bagasse with hot pressing time of 20, 30 and 40 min met the mechanical properties requirement stated in Japanese Industrial Standard (JIS). Nevertheless, the sastifactory results were obtained for water absorption (WA) and thickness swelling (TS) test ranged from 8% to 25%. Therefore, the binderless particleboard made from sugarcane bagasse waste were successfully manufactured and can be alternative and consideration for building material especially for indoor application.

- by kushairi mohd salleh
- •
- Materials Science, Composite Material, Particleboard, Bagasse

Effects were studied of 200 ppm silver and copper nano-suspensions, with size range from 20 to 80 nm, on the hardness of particleboards produced at an industrial scale at the Iran-Choob Factory, Iran. Metal nano-suspensions were added to the mat at two levels of 100 and 150 milli-liters/kg dry weight wood particles, and the results were compared with those of the control panels. Results showed that the high thermal conductivity coefficient of silver nanoparticles broke down part of the resin bonds; it also heat-treated the surface wood particles, resulting in significant decrease in the hardness of treatment with 150 mL/kg. However, in the nanocopper-treated panels, no significant change was observed due to the lower thermal conductivity coefficient of copper; furthermore, as to the formation of higher hydroxyl bonds, it even slightly increased. High significant correlations were determined between most of the physical and mechanical properties of the panels.

- by Hamid R Taghiyari
- •
- Materials Science, Nanotechnology, Metal Nanoparticles, Particleboard

- by Prakash Gope
- •
- Materials Science, Mechanical properties, Particleboard, Resin

Single-layered particleboards were produced from granulated Quercus cerris bark containing cork and phloem granules using standard hot-press equipment and phenol–formaldehyde resin. The experimental boards were tested for thickness swelling, mechanical strength and thermal properties. Scanning electron microscopy observations were carried out to analyze the panel structure. The results showed that Q. cerris bark particleboards had low thickness swelling in water, high resistance to thermal degradation and high calorific values but their mechanical strength was below that of commercial wood particleboards. The produced Q. cerris bark particleboards were adequate for exterior applications where mechanical strength is not the key factor. Potential for process and feedstock optimization was acknowledged. You can reach full text from here: https://link.springer.com/article/10.1007/s00107-017-1284-6

- by Umut Sen
- •
- Building, Wood science and technology, Forestry Sciences, Bark Anatomy

- by jan heri
- •
- Particleboard

This study aims to analyze the potential of poppy (Papaver somniferum Linnaeus) husk for manufacturing wood-based particleboards. On these basis three layers particleboards were produced and physical, mechanical properties, formaldehyde emission and limitation of oxygen index were analyzed. The results indicate that it is possible to produce particleboards from poppy husk and pine wood by using urea formaldehyde adhesive. Particleboards which are manufactured by using poppy husk up to 25% provide both physical and mechanical requirements in European Norm (EN 312). In addition, poppy husk particles reduced the formaldehyde emission and increased the fire retardant property for the manufactured particleboards.

- by Hailu Shimels
- •
- Bamboo, Reserch, Particleboard, Oxytenanthera abyssinica

Objetivou-se avaliar a resistência de aglomerados confeccionados com madeira de Acacia mangium Willd. colada com adesivo à base de ureia-formaldeído e taninos a organismos xilófagos. Os painéis foram produzidos com 40 × 40 × 1,27 cm (largura × comprimento × espessura); ao adesivo, foram adicionados 10, 20 e 30% de taninos, sendo empregadas quatro razões de compactação (1,39; 1,55; 1,73 e 2,00). Nos ensaios com fungos e térmitas, utilizaram-se amostras de 2,50 × 2,50 × 1,27 cm (largura × comprimento × espessura). Empregaram-se os fungos Gloeophyllum trabeum e Trametes versicolor (12 semanas de ensaio) e o térmita Nasutitermes sp. (45 dias de ensaio). Para o Gloeophyllum trabeum, os painéis com maior proporção de taninos e razão de compactação foram mais eficientes. Para o Trametes versicolor, não houve diferença entre os adesivos e razões de compactação utilizados. O Gloeophyllum causou maior perda de massa que o Trametes. Os térmitas consumiram completamente as amostras. ABSTRACT This study aimed to evaluate the resistance of particleboards made of Acacia mangium Willd. wood, bonded with urea-formaldehyde and tannins as adhesive, against xylophagous organisms. Panels of 40 × 40 × 1.27 cm (width x length x thickness) were produced; 10, 20 and 30% of tannins were added to the adhesive; four compaction ratios (1.39; 1.55; 1.73 and 2.00) were employed. Samples of 2.50 × 2.50 × 1.27 cm (width x length x thickness) were used in the tests with fungi and termites. Gloeophyllum trabeum and Trametes versicolor (12 weeks) fungi and Nasutitermes sp. (45 days) termites were employed in the tests. Panels with the highest compaction ratio and proportion of tannins provided the most effective resistance to Gloeophyllum trabeum. No difference between the adhesives and compaction ratios was observed for Trametes versicolor. Gloeophyllum trabeum caused greater mass loss than Trametes versicolor. The samples were completely consumed by the termites.

- by Floresta Ambiente
- •
- Particleboard, Biodeterioration, Subterranean Termite, painéis reconstituídos

Utilization of oil pa
lm trunk waste for production of environmental friendly
binderless particleboard was studied. Response surface methodology
was used to optimize the manufacturing conditions. The steaming
temperature (100 to 120 ̊C), steaming time (25 to 50 min), hot pressin
g
temperature (180 to 220 ̊C)
,
and hot pressing time (15 to 30 min) were
optimized in the ranges shown. The optimum conditions for making the
particleboard were found to involve steaming for 46 min at a temperature
of 120 ̊C before
it was
compressed using a
pressure of 12 MPa, at a
temperature 215 ̊C for 29 min. The internal bond (IB) strength, modulus
of rupture (MOR), thickness swelling (TS), and water absorption (WA)
were 0.54 MPa, 8.18 MPa, 22%, and 51%, respectively. The residual
v
alues of actual and mod
el
-
based calculated IB, MOR, TS, and WA were
found to be 0.1 MPa, 0.23 MPa, 2%, and 4%, respectively, which shows
the significance of the study.

- by World Nieh
- •
- Engineering, Chemistry, Polymer Chemistry, Wood Science

O objetivo do presente trabalho foi estabelecer o efeito do uso de misturas de diferentes proporções de partículas de Sequoia sempervirens e Pinus taeda nas propriedades colorimétricas de aglomerados, além de avaliar a alteração natural da cor após exposição ao intemperismo natural por seis meses. As análises colorimétricas foram realizadas através do sistema CIE-L*a*b* 1976. Os resultados indicaram uma relação direta das proporções de partículas de Sequoia sempervirens com os valores médios do pigmento vermelho (a*) e uma relação indireta com os valores do pigmento amarelo (b*). Desta maneira, a cor do produto final pode ser prevista de acordo com o controle de proporções de partículas de diferentes espécies. Contudo, a exposição do material à luz natural por quatro meses é o suficiente para afetar negativamente os pigmentos a* e b*, e tende a eliminar a diferença de cores entre os painéis. Palavras-chave: colorimetria, aglomerados crus, CIE-L*a*b*.

- by Floresta Ambiente and +2
- •
- Colorimetric Properties, Particleboard, Colorimetría, aglomerados crus

Binderless particleboard panel made from sugarcane (Saccharum officinarum L.) bagasse was manufactured by using waste product of sugarcane. The target density, pressing temperature, pressing time and pressing pressure used were 0.8 g/cm3, 180 °C, 10-40 min and 12 Mpa respectively. Modulus of rupture, internal bonding strength, thickness swelling and water absorption of the boards were evaluated based on Japanese Industrial Standards (JIS A 5908:Particleboards). From this research, the 30 min pressing time panel had the highest modulus of rupture (MOR) and modulus of elasticity (MOE) values which were 15.16 Mpa and 1710 MPa respectively. Panels made from sugarcane bagasse with hot pressing time of 20, 30 and 40 min met the mechanical properties requirement stated in Japanese Industrial Standard (JIS). Nevertheless, the sastifactory results were obtained for water absorption (WA) and thickness swelling (TS) test ranged from 8% to 25%. Therefore, the binderless particleboard made from ...

- by Asniza Mustapha
- •
- Particleboard, Sugarcane Bagasse, Binderless Particleboard

Binderless particleboard panel made from sugarcane (Saccharum officinarum L.) bagasse was manufactured by using waste product of sugarcane. The target density, pressing temperature, pressing time and pressing pressure used were 0.8 g/cm3, 180 °C, 10-40 min and 12 Mpa
respectively. Modulus of rupture, internal bonding strength, thickness swelling and water absorption of the boards were evaluated based on Japanese Industrial Standards (JIS A 5908:Particleboards). From this research, the 30 min pressing time panel had the highest modulus of
rupture (MOR) and modulus of elasticity (MOE) values which were 15.16 Mpa and 1710 MPa respectively. Panels made from sugarcane bagasse with hot pressing time of 20, 30 and 40 min met the mechanical properties requirement stated in Japanese Industrial Standard (JIS). Nevertheless, the sastifactory results were obtained for water absorption (WA) and thickness swelling (TS) test ranged from 8% to 25%. Therefore, the binderless particleboard made from sugarcane bagasse waste were successfully manufactured and can be alternative and consideration for building material especially for indoor application.

- by Norani Abd Karim
- •
- Particleboard, Sugarcane Bagasse, Binderless Particleboard

Special tubular fiberboard with a density of 550 kg/m 3 was manufactured using the round rods for creation of the holes. Physicomechanical properties of tubular fiberboard (6, 8, 10, 12 mm) with various hole diameters and number of hole (0, 1, 2 and 3 in a constant cross section) were evaluated. The surface layers density, especially on top of the holes, considerably elevated with increasing the hole diameter. This did create higher bending properties as well as higher internal bond and surface soundness. The structure of webs between the holes, when the holes' number increases, were predominant factor influencing the panel properties. Weak and loose web structure were obtained by increasing the holes' number from 1 to 3 within a constant cross section (50 mm × 16 mm) that was due to the less transferred fiber during pressing in the webs' sections. A corresponding comparison of panel properties with those in American and Euro-pean standards presents that the minimum requirements according to most of the standards were obtained.

- by Maderas. Ciencia y Tecnologia
- •
- Wood Plastic Composite, Wood Science, Wood Anatomy, Particleboard