Long-Term Performance of Engineered Wood Flooring with Oriented Strand Board Substrate

Abstract

Plywood is widely used as a substrate in engineered wood flooring (EWF) construction. While the Canadian EWF industry largely relies on Baltic birch plywood (BBP), the development of an alternative substrate is clearly desirable. The objective of this study was to evaluate the long-term performance of EWF made with an oriented strand board (OSB) substrate designed to deliver a higher than normal internal bond. Three-layer OSB panels were made from a mixture of 90 percent aspen (Populus tremuloides) and 10 percent paper birch (Betula papyrifera). Three adhesive configurations were used in the manufacture of specialty OSB panels: 100 percent liquid phenol formaldehyde (PF) resin, a mixture of 60 percent liquid PF resin and 40 percent powder PF resin, and 100 percent polydiphenylmethane diisocyanate (pMDI) resin. The performance of these three specialty OSB products was studied. Five types of substrate were used in the manufacture of EWF: BBP, sheathing OSB, and the three specialty OSBs. A polyurethane adhesive was selected to bond the surface layers to the substrates. The result of this experimental study indicated no significant difference between the long-term performance of the OSB substrate made with pMDI resin and that of the BBP substrate.

Mechanical Properties of Bamboo Ply Panels when Exposed to Artificial and Outdoor Aging

“…The equivalence of accelerated and outdoor weathering Outdoor weathering was designed in this study with the purpose of study the lifespan of BPP as well as establish comparison to laboratory aging. Previous research [7][8] showed both reversible and irreversible dimension changes were known to occur as a result of water absorption and desorption, stress take place due to unbalanced dimension variation, stress transfer and build-up in fibers and bond interface and controlled by the interfacial strength and integrity of the panels. Fig.…”

The Effect of Different Ambient Temperatures on the Adhesion Performance of Black Pine (Pinus nigra) Wood

“…Indeed, the prolonged durability of engineered wood flooring is crucial, especially considering the influence of heat and moisture fluctuations. Blanchet (2008) revealed that most adhesive, except for epoxy adhesive, demonstrated comparable performance. The utilization of epoxy adhesive resulted in notable inconsistencies and delamination in the structures.…”

Warping and Surface Checking Analysis of Engineered Wood Flooring for Heating Systems

“…All of the samples were provided by Dare (Jiangsu) Parquet of Jiangsu, China. According to the different properties of the substrate layers (9 mm thick poplar or 2 mm thick poplar/seven layer plywood), the floorings samples for the 9 mm thick poplar panels had two types of surface layers tested (structures A and B), whereas the 2 mm thick poplar/seven layer plywood panels were labeled structure C (Blanchet et al 2008;Barbuta et al 2010). The two types of surface layers used for the 9 mm thick poplar panels were: structure A, which contained a 4 mm thick decorative veneer surface layer and a 2 mm thick poplar veneer as backing layer (Fig.…”

“…It was found that substrates and surface components will impact long-term performance properties, such as aging resistance. Of the adhesives tested, epoxy exhibited poor gluing and delamination, whereas EPl adhesives exhibited the best performance in terms of aging (Blanchet 2008). Other research (Fang et al 2012a,b) has explored the use of oil-heat treatment applied to densified wood to reduce the hygroscopicity and improve mechanical properties of wood veneers.…”

“…Therefore, these researchers developed a finite elemental model of the hygromechanical cupping in engineered wood flooring and used it to predict deformation (Blanchet et al 2005). Blanchet (2008) also assessed engineered wood flooring components for aging performance, comparing different substrates, surface components, and cold set adhesives. It was found that substrates and surface components will impact long-term performance properties, such as aging resistance.…”