Surface properties of MDF coated with calcite/clay and effects of fire retardants on these properties

Abstract

ABSTRACTe coating of wood and wood panel surfaces basically serves for surface protection and its surface can be improved at various user areas. Di erent application methods are used for the coating of MDF surface. ese are methods such as curtain coating, spraying, rolling, knife, etc. In this study, suitability of pigment coating method instead of the traditional surface coating methods used for coating MDF panels and the e ects of re retardants on surface properties of MDF coated by the best appropriate coating mixture was investigated. Calcite and clay were used as coating pigment and latex, urea formaldehyde, and melamine formaldehyde were used as adhesive. Coating/adhesive mixture obtained was applied to MDF panels with knives. Before the analysis, test samples were put to condition room and they were kept in there for 1 week. According to the results obtained, the best appropriate coating material was found as calcite. 22% concentrated melamine formaldehyde as adhesive and 0.25 mm as coating thickness was determined better than other combinations. Borax, boric acid and zinc borate as re retardant were added to calcite /melamine formaldehyde with 22% mixture. So, the e ects of re retardant on surface characterization were determined. Surface properties of coated MDF panels tested were found lower than standard requirements except for abrasion resistance.

The effect of varnish type, glue amount, and density on the surface properties of low density particleboards produced from waste wood bark

“…The surface coating enhances the aesthetic appearance of the panels and improves their physical and mechanical properties (Nemli et al 2005a;Nemli and Usta 2009;Donmez Çavdar et al 2013;Liu and Zhu 2014). While particleboard panels are used in interior applications, their hygroscopic nature plays a significant role in their performance due to long-term changes in relative humidity (Hızıroğlu 1999;Kılıç et al 2009;İstek et al 2012, 2017b. Surface properties such as surface roughness, adhesion, and the quality of the final product are important, since coating materials form the underlying layer of the panels.…”

Evaluation of Palm Fiber Components as Alternative Biomass Wastes for Medium Density Fiberboard Manufacturing

“…Other trials in producing green artificial wood were carried out by using HCHO-free adhesive and changing the surface properties of natural lignocellulosic fibres by different grafting techniques [34,[38][39][40][41], or by in-situ grafting of agro-fibres with the free styrene containing polyester [22]. To improve the water resistance (WA and TS) of wood fibers-based MDF together with limitation of formaldehyde emission of promotion of the quality of the resins, wollastonite and its nanoparticles were used in internal and surface treatments [42][43].However, surface treatment of MDF by Calcite (100%), clay (100%) or mixture of clay/calcite did not cause a significant difference on surface quality [28].…”

Evaluation of palm fiber components an alternative biomass wastes for medium density fiberboard manufacturing

“…To improve the water resistance (WA and TS) of wood fibers-based MDF together with limitation of formaldehyde emission of promotion of the quality of the resins, wollastonite and its nano-particles were used in internal and surface treatments Nouri 2015, Taghiyari andNouri 2016). However, surface treatment of MDF by Calcite (100%), clay (100%) or mixture of clay/calcite did not cause a significant difference on surface quality (Istek et al 2012).…”