Avaliação tecnológica de painéis MDF de madeira de &lt;i&gt;Eucalyptus grandis &lt;/i&gt; confeccionados em laboratório e em linha de produção industrial

Belini, Ugo Leandro; Filho, Mário Tomazello

doi:10.5902/198050982063

Cited by 3 publications

(5 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Different studies demonstrate that the TS may vary widely, because it may be influenced by some factors as raw materials, kind of resin and the use or not of a hydrophobic agent. 7,34,43,44 Also, it is observed that there is a proportional relation between CR (Table 3) and TS, where the panels which presented the higher values of CR also were the ones that presented higher TS. This behavior can be attributed to a higher densification of these panels, which decrease empty spaces in the panel.…”

Section: Panels Characterizationmentioning

confidence: 80%

“…Different values of density both to laboratorial as industrial MDFs can be found, demonstrating that the final density of fiber panels is a condition that needs to be considered, regardless the manufacturing process. 34…”

Section: Resultsmentioning

confidence: 99%

“…33 Different values of density both to laboratorial as industrial MDFs can be found, demonstrating that the final density of fiber panels is a condition that needs to be considered, regardless the manufacturing process. 34 The compaction ratio presents a relation between the final density of the panel and the density of raw materials. Even though the pure HDPE presents a higher density than the composite, there was no influence of the kind of polymeric filler in the groups.…”

Section: Panels Characterizationmentioning

confidence: 99%

“…Even though the incorporation of a polymer may be interpreted as the insertion of non-interactive points inside the panel, the quantity of resin available may compensate, prevent the reduction of the resistance of the panel. Also, the results found on literature present discrepant values for this variable, 5,7,34,48,[50][51][52] proving that the internal strength is a characteristic that vary both on conventional MDF as in panels formed by alternative materials. Moreover, only groups P10, C10, C30 and C50 did not reach the minimum recommended values, according to compared standards.…”

Section: Panels Characterizationmentioning

confidence: 99%

“…The NBR 15316:2-2015 standard does not provide a minimum value of screw withdrawal resistance, however, some technical specifications present these properties as a minimum value of 750 N for top and 1000 N for surface. 34,43,[53][54][55][56] MDF micrographs. Figure 10 presents images obtained in the SEM for the control group, in the magnification varying from 30X to 1500X.…”

Section: Panels Characterizationmentioning

confidence: 99%

See 4 more Smart Citations

High density polyethylene matrix composite as reinforcing agent in medium density fiberboards

Barnasky

Cunha

Oliveira

et al. 2020

Journal of Composite Materials

View full text Add to dashboard Cite

This work provides a study about the incorporation of a high density polyethylene (HDPE) matrix composite in medium density fiberboards (MDF). A composite was processed in a single screw extruder with 5% of Pinus spp fibers in a HDPE matrix and applied as reinforcing agent in MDFs, as well as pure HDPE, in 11 different variations, using 12% of urea-formaldehyde resin and nominal density of 750 kg.m−3. The composite and the pure HDPE were analyzed by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). The DSC results showed that both polymeric matrix and composite presented the same melting temperature but the composite had a reduced melting enthalpy and crystallinity due to thermal history. SEM analysis showed a well distribution of fibers on the composite. The results of technological properties of MDFs were compared to commercial MDF standards. The MDF reinforced with 40% of polymeric composite reached all minimum standard requirements, being the most recommended to be used as an alternative to conventional MDF, in terms of physical and mechanical performance.

show abstract

Section: Panels Characterizationmentioning

confidence: 80%

Section: Resultsmentioning

confidence: 99%

Section: Panels Characterizationmentioning

confidence: 99%

Section: Panels Characterizationmentioning

confidence: 99%

Section: Panels Characterizationmentioning

confidence: 99%

See 3 more Smart Citations

High density polyethylene matrix composite as reinforcing agent in medium density fiberboards

Barnasky

Cunha

Oliveira

et al. 2020

Journal of Composite Materials

View full text Add to dashboard Cite

show abstract

Properties of MDF manufactured with mixtures of wood from paricá plantations and wood waste from native Amazonian species

RIBEIRO,

BORTOLETTO JÚNIOR

2024

Acta Amaz.

View full text Add to dashboard Cite

Brazil stands out as one of the largest manufacturers of MDF (medium density fiberboard) in the world. The industries are concentrated in the south and southeast of the country and are primarily based on the use of Pinus and Eucalyptus wood, which are available in extensive planted areas. In the northern region, there is only one MDF industrial plant. Despite an abundance of potential raw materials in this region, there is a lack of studies on native species wood and their industrial waste utilization for MDF production. The present study aimed to evaluate the properties of MDF manufactured from a mixture of cultivated paricá (Schizolobium amazonicum) wood and wood waste from native Amazonian species. The study assessed the isolated effects of different proportions of the raw materials and panel thicknesses on MDF properties. Panels were produced, and samples were obtained for testing. Using standard procedures, the following properties were determined: density, water absorption, thickness swelling, internal bonding, static bending, and resistance to screw withdrawal. The results revealed a significant impact of the analyzed variables on some physical and mechanical properties of MDF. With the exception of internal bonding, all other properties of the evaluated MDF panels met the specified regulatory requirements for use in furniture manufacturing. It is concluded that mixtures of the assessed raw materials have great potential for MDF production in the furniture industry. However, adjustments in the production process are recommended to improve the internal bonding property.

show abstract

Variação das propriedades tecnológicas de painéis MDF em uma linha de produção industrial no Brasil

Araújo

Protásio

Barbosa

et al. 2021

RSD

View full text Add to dashboard Cite

No presente estudo foram caracterizadas as propriedades tecnológicas de painéis de fibras de média densidade (MDF), em diferentes horários de produção em uma linha industrial brasileira, com o objetivo de avaliar a variabilidade tecnológica das chapas e sua qualidade em relação à norma técnica comercial. Painéis MDF confeccionados com fibras de Eucalyptus spp. (70%), Schizolobium parahyba (20%) e madeiras residuais de serraria (10%), aglutinados com resina ureia-formaldeído foram coletadas em intervalos de duas horas de um turno de produção da empresa. Foram determinadas às propriedades físicas (umidade, densidade aparente, absorção superficial, absorção de água, inchamento em espessura e taxa de não retorno de espessura) e resistência mecânica (flexão estática, dureza janka, tração perpendicular e arrancamento de parafuso). Os painéis de início e final do turno foram submetidos ao ciclo de envelhecimento acelerado, sendo avaliados posteriormente à densidade, tração e flexão estática. Do total das propriedades avaliadas nos painéis MDF, um percentual de 55% não apresentaram variações entre os horários de produção, e se enquadraram aos valores da norma. Apenas as propriedades de inchamento em espessura (IE 24h) e tração em 80% dos horários, não atenderam aos valores estipulados pela ABNT NBR 15316-1, variando de 11,2 a 15,6% e 0,42 a 0,62 N/mm², respectivamente, entre o início e o final do turno. O envelhecimento acelerado promoveu diminuição expressiva na qualidade das chapas. Os painéis MDF estudados apresentam bom desempenho tecnológico para uso em ambiente seco, e sua variação tecnológica decorreu do uso de fibras de diferentes madeiras na produção das chapas.

show abstract

Avaliação tecnológica de painéis MDF de madeira de <i>Eucalyptus grandis </i> confeccionados em laboratório e em linha de produção industrial

Cited by 3 publications

References 1 publication

High density polyethylene matrix composite as reinforcing agent in medium density fiberboards

High density polyethylene matrix composite as reinforcing agent in medium density fiberboards

Properties of MDF manufactured with mixtures of wood from paricá plantations and wood waste from native Amazonian species

Variação das propriedades tecnológicas de painéis MDF em uma linha de produção industrial no Brasil

Contact Info

Product

Resources

About