Investigation of Shear Strength of Engineered Wood Flooring Bonded with PUR by Response Surface Methodology

Abstract

The effects of process parameters (adhesive spreading rate, pressing time, and applied pressure) on the response parameter (shear strength) of engineered wood flooring bonded with polyurethane (PUR) were studied by response surface methodology. A mathematical model was established to provide a satisfying prediction for the experimental results observed. The model indicated a high degree of fitting. The results also showed that the major factors were adhesive spreading rate and pressing time. The optimized parameters for highest shear strength of engineered wood flooring were 98 g/m 2 adhesive spreading rate with pressing time of 24 s and applied pressure of 1.2 MPa, respectively, within certain ranges.

Properties of engineered wood flooring with cold-pressing and emulsion polymer isocyanate adhesive

“…Nowadays, EPI adhesive is commonly used in various products, such as bonding laminates, veneers, and composite materials. Based on the above literature and field survey, pressing time, pressure, and adhesive spread have great impact on the properties of engineered wood flooring, especially for the MOE and MOR (Wang et al 2017). Thus, in the industrial cold pressing of engineered wood flooring with EPI adhesive, how to choose the reasonable pressing time, pressure, and adhesive spread is the key to improving product quality, and it is also an urgent issue for enterprises to solve.…”

“…Figure 2a shows the changes in MOE of engineered wood flooring at different pressing time, where the MOE increased first and then decreased with the increase of pressing time. According to related work (Wang et al 2017), the surface board and substrate are bonded with adhesive, when the cold pressing time is short, and the adhesive has not yet fully contacted the surface of substrate. In other words, it did not form a continuous adhesive layer between the surface board and substrate, which led to the lower level of MOE.…”

Deformation rate of engineered wood flooring with response surface methodology and adaptive network-based fuzzy inference system

“…Response surface methodology (RSM) is a collection of mathematical and statistical techniques, and it is widely adopted for modeling and analyzing [ 13 ]. RSM was used by Wang et al [ 14 ] to explore the effect of processing parameters on the shear strength of engineered wood flooring. In their work, a predicted model was developed to find the relationship between shear strength and pressing time, pressure, and adhesive spreading rate.…”