Physical-mechanical Properties of Plywood Produced With Acrocarpus fraxinifolius and Pinus oocarpa

Reis, Abner Henrique Santos; Silva, Danillo Wisky; Vilela, Alan Pereira; Mendes, Rafael Farinassi; Mendes, Lourival Marin

doi:10.1590/2179-8087.015717

Cited by 6 publications

(5 citation statements)

References 12 publications

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“…The result obtained for the PIFF treatment for the perpendicular MOE was well above those found for Pinus taeda plywood, i.e., 2.24 MPa (Mendes et al 2013). Reis et al (2019) studied the mechanical properties of plywood produced with Pinus oocarpa and found a value higher than that observed in this study for perpendicular MOR, namely 31.5 MPa.…”

Section: Static Bendingcontrasting

confidence: 73%

Influence of different sheet compositions and commercial adhesives on the performance of multilaminated plywood

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Zidanes

Miranda

et al. 2021

Preprint

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The quality of plywood panels depends on factors such as the forest species and the adhesive used in their production, and understanding the interferences of these factors in the final properties of the plywood is of fundamental importance. The study aimed to develop multilaminate plywood panels with two forest species and two types of adhesive and to evaluate the influences of these factors (forest species and adhesive) on the physical and mechanical properties of the plywood. The panels were produced with sheets of parica and pine with two types of adhesives, urea-formaldehyde and phenol-formaldehyde, with a weight of 150 g/cm². Then, each set was pressed for 10 minutes under a specific pressure of 0.98 MPa at a temperature of 150 °C. Three panels were produced for each type of blade and adhesive, totaling four treatments. The plywood was evaluated for physical properties (humidity, bulk density, and water absorption) and mechanical properties (parallel and perpendicular static flexion and resistance to mechanical shear). The results showed that the forest species had a greater influence on physical and mechanical properties, with the best results being observed for plywood produced with pine. The panels with sheets of parica and phenol-formaldehyde adhesive showed less moisture. The apparent density of the panels should be considered as it positively influenced the mechanical properties and negatively impacted water absorption. It is concluded that the plywood produced can be used for internal and external applications. However, it is indicated for structural purposes as it did not meet the requirements of the NBR 31.000.001/2:2001.

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Section: Static Bendingcontrasting

confidence: 73%

Influence of different sheet compositions and commercial adhesives on the performance of multilaminated plywood

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Zidanes

Miranda

et al. 2021

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“…Acrocarpus exhibits higher veneer yields with all strong plywood production characters (Parthiban et al, 2019). The species is reported in the production of compensated panels associated with other timber species to improve the quality of plywood (Reis et al, 2019). The resinous material in the wood characterizes Acrocarpus.…”

Section: Resultsmentioning

confidence: 99%

Suitability of Acrocarpus fraxinifolius as a Pulping Raw Material

Ashwath,

Sathish,

Akshayakumari

et al. 2023

IJEP

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The present study emphasized on wood trait indices of Acrocarpus fraxinifolius for understanding the suitability of the species for paper and pulp industries. The study was conducted at the College of Forestry, Ponnampet, Karnataka in 2020. The wood core samples were collected from the trees falling under 130 to 150 cm girth class, standing in coffee-based agroforestry systems of Kodagu, Karnataka, India. A total of 12 wood core samples were collected using the Presseler’s increment borer at breast height level. For wood fibre analysis the core portion was divided and three, i.e., near to the pith portion, middle and periphery, and made as a composite sample. Core samples were macerated using Jeffreys solution technique at Forest Product and Utilization Laboratory, College of Forestry, UAHS, Shivamogga. Fifty measurements on fibre parameters (Fibre length, Fibre width, Fibre wall thickness, and Fibre Lumen width) were recorded for each sample under a stereomicroscope with an inbuilt Image Analyzer. The mean fibre properties recorded, were used for calculating wood anatomical indices such as the Runkel ratio, Slenderness ratio, Flexibility coefficient, and Rigidity coefficient using standard formulas. The mean Runkel ratio, Slenderness ratio, Flexibility coefficient, and Rigidity coefficient were 0.580, 60.132, 63.290, and 0.184 respectively. The anatomical screening suggests that the species can be used as raw material for paper production, based on the indices. Further research is required to explore the mechanical and chemical properties of commercial exploitation for pulping.

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“…plywood panels with phenol-formaldehyde adhesive, results higher than those found in this study. For Reis et al (2019) water absorption was 65,7 % for plywood panels produced with veneers exclusively with Pinussp. and 50,5 % for those with indian cedar (Cedrus deodara (Roxb.)…”

Section: Physical Characterization Of the Plywood Panelsmentioning

confidence: 96%

“…do not follow this expected trend, which can be explained by the anisotropy of the wood material. Variations in density, presence of defects, and nonuniformity of moisture along the plywood can account for the lower values of flexural strength in the parallel direction compared to the perpendicular direction(Lengowski et al 2021) Reis et al (2019). produced plywood panels with 28-year-old ocote pine (Pinus oocarpa Schiede ex Schltdl.)…”

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confidence: 99%

Utilization of nanotalc modified adhesives in plywood panels

Lourenço,

Aparecida dos Santos,

Corrêa Furtini

et al. 2024

Maderas-Cienc Tecnol

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As an alternative for the partial replacement of synthetic adhesives are the modifications that occur still during their synthesis, to improve and adhere new properties. Among the possible materials used in nanoscale, talc is a mineral material of natural origin and a promising raw material due to its low cost, lightness, natural hydrophobicity. Due to the scarcity of studies with the insertion of nanotalc in adhesives, this study aimed to produce plywood panels bonded with phenol-formaldehyde adhesive nanomodified with talc to evaluate its physical-mechanical resistance when compared to conventional synthetic adhesives. To carry out this study, three Pinus oocarpa trees with 28 years of age were used. Different concentrations of talc were used in the formulation with the phenol-formaldehyde adhesive, being the treatments 0; 0,05; 1; 1,5 and 2 % of talc (mass/mass) in relation to the adhesive, with three panels per treatment, totaling 15 panels. The pressing time was 8 minutes with temperature of 160 ºC and pressure of 1 MPa. The physical-chemical characteristics of the lignocellulosic material and of the plywood panels were determined. The quality of the adhesive produced was demonstrated by its resistance to water absorption with the insertion of up to 2 % talc to the adhesive, reducing it considerably. From 1 % talc inserted, the plywood panels had their mechanical characteristics superior to those glued with pure phenol-formaldehyde adhesive. However, as the study is innovative in nature, further research should focus on the application and quality evaluation of other talc nanomodified adhesives on different types of wood panels.

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Physical-mechanical Properties of Plywood Produced With Acrocarpus fraxinifolius and Pinus oocarpa

Cited by 6 publications

References 12 publications

Influence of different sheet compositions and commercial adhesives on the performance of multilaminated plywood

Influence of different sheet compositions and commercial adhesives on the performance of multilaminated plywood

Suitability of Acrocarpus fraxinifolius as a Pulping Raw Material

Utilization of nanotalc modified adhesives in plywood panels

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