Quality Control in Plywood Manufacturing: Physical Properties of Commercial Plywood of Pinus sp

Almeida, Diego Henrique de; Ferro, Fabiane Salles; Varanda, Luciano Donizeti; Souza, Amós Magalhães de; Icimoto, Felipe Hideyoshi; Christofóro, André Luis; Lahr, Francisco Antônio Rocco

doi:10.5923/j.cmaterials.20130306.04

Cited by 5 publications

(1 citation statement)

References 11 publications

(8 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pinus plywood may present water absorption close to 60% (Almeida et al, 2013;Silva et al, 2012;Campos et al, 2009), lower than those observed in this study. This difference is due to low wood density of both species used and the veneer thickness of 2.2 mm.…”

Section: Panel Physical Propertiescontrasting

confidence: 69%

Juvenile Wood from Pinus patula Schltdl & Cham for Multilaminated Panel Production

et al. 2020

View full text Add to dashboard Cite

Wood scarcity, attacks by primates and insects, and fungal damage in forest plantations make the introduction of new species necessary. Given this, it is important to understand the potential uses of wood in the production chain. Pinus patula Schltdl & Cham presents good adaptation to Brazilian conditions and is a candidate for wood supply. Its juvenile wood density however, is lower than that of other pine species. This study aimed to evaluate the properties of veneer on panels produced with twelve-year old P. patula wood compared with panels produced with P. taeda wood of the same age, which is commonly used for panel production. Panels were bonded with urea-formaldehyde and phenol-formaldehyde adhesives using veneers applied on two types of plywood panel. The P. patula panels showed lower strength, stiffness and density when bonded with urea-formaldehyde, and higher strength, density and stiffness when bonded with phenol-formaldehyde in comparison with P. taeda. P. patula panels can be used for multilayer panel production.

show abstract

Section: Panel Physical Propertiescontrasting

confidence: 69%

Juvenile Wood from Pinus patula Schltdl & Cham for Multilaminated Panel Production

et al. 2020

View full text Add to dashboard Cite

show abstract

Physical and Mechanical Properties of Plywood Produced with Thermally Treated Pinus taeda Veneers

Arroyo

Kondo

Santos

et al. 2022

Forests

View full text Add to dashboard Cite

Plywood is a structural composite mainly applied in construction. For this purpose, some sort of preservative treatment is recommended to increase its durability. One option of the available treatments is heat treatment, which promotes the modification of the wood properties. This treatment is carried out on the final product (plywood), because it can reduce strength if applied to the veneers. However, no study has proven such a reduction. Therefore, the aim of this work was to evaluate three different temperatures (160 °C, 180 °C and 200 °C) of the heat treatment on the veneer surface and on the physical properties (specific gravity, moisture content and swelling in thickness) and mechanical properties (MOE and MOR in static bending) of Pinus taeda plywood. A reduction was observed in the roughness of the veneer’s surfaces and the total extractives content changed, with a minimum value reached in the 160 °C treatment. The plywood specific gravity initially increased with the heat treatment and did not change at higher temperatures, moisture content reduced, and thickness swelling was not affected. There was no change in the mechanical properties of the plywood, evidencing that the veneer heat treatment does not prejudice mechanically the final product.

show abstract

Properties of patula pine plywood using phenolic resin-impregnated veneers

Bednarczuk,

Tavares,

Hillig

et al. 2024

Cad. Pedagógico

View full text Add to dashboard Cite

Having observed the need for structural panels for external use, it is important to study methods of treating wood from new forest species, with less harmful products. In this sense, veneers of Pinus patula wood were subjected to immersion treatment in phenolic resin diluted in water at 5% solids content for one minute, and subsequently used to produce plywood panels using phenol-formaldehyde resin, with a weight of 160 g /m² in single line. The experimental design included four types of panels: fresh veneers glued with 35% resin solids content, treated veneers glued with 12%, 23% and 35% resin solids content. The physical-mechanical properties of the panels were compared with the parameters defined by the Brazilian Association of the Mechanically Processed Wood Industry (ABIMCI) and the Brazilian Association of Technical Standards (ABNT). The panels produced presented apparent density and bonding quality results below the minimum recommendations established in these technical parameters, in addition to water absorption higher than the values found in research with other pine species. However, veneer panels treated with phenolic resin showed better bonding quality than untreated panels for the same resin solids content. In less severe conditions, such as in the wet bonding test, the use of 23% resin solids content maintained bonding quality compared to 35% untreated wood. Therefore, further studies are suggested on the use of wood veneers treated with phenol and to reduce the resin solids content for to reduce costs and harmful effects on the environment.

show abstract

Quality Control in Plywood Manufacturing: Physical Properties of Commercial Plywood of Pinus sp

Cited by 5 publications

References 11 publications

Juvenile Wood from Pinus patula Schltdl & Cham for Multilaminated Panel Production

Juvenile Wood from Pinus patula Schltdl & Cham for Multilaminated Panel Production

Physical and Mechanical Properties of Plywood Produced with Thermally Treated Pinus taeda Veneers

Properties of patula pine plywood using phenolic resin-impregnated veneers

Contact Info

Product

Resources

About