Fire and bending properties of blockboard with fire retardant treated veneers

Laufenberg, Theodore L.; Ayrılmış, Nadir; White, Robert H.

doi:10.1007/s00107-005-0041-4

Cited by 20 publications

(13 citation statements)

References 3 publications

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“…Results revealed that the surface quality of the panel decreased as the ratio of re retardants increased. Previous work on FRT blockboard plywood found that increased chemical concentrations gave higher retention values which in turn resulted in better re resistance characteristics of the samples (Laufenberg et al 2006). However, this study indicates that surface roughness of the panels can be adversely in uenced by increased concentrations of re retardants.…”

Section: E E Ects Of Fire Retardants On Surface Characterization Of Ccontrasting

confidence: 51%

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

İstek

Aydemir

Eroğlu

2012

Maderas, Cienc. tecnol.

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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.

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Section: E E Ects Of Fire Retardants On Surface Characterization Of Ccontrasting

confidence: 51%

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

İstek

Aydemir

Eroğlu

2012

Maderas, Cienc. tecnol.

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“…The improvements were limited by the relatively thin veneer of the dip-treated wood exposed during the fire testing. Specifically, more thorough treatment of the veneers could be achieved with pressure treatment and another level of fire performance could be achieved through treatment of the core (Laufenberg et al 2006). …”

Section: Discussionmentioning

confidence: 99%

Combustion properties of medium-density fiberboards coated by a mixture of calcite and various fire retardants

İstek¹,

Aydemir²,

Eroğlu³

2013

Turk J Agric For

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The properties of wood and wood-based panels may be affected by many factors, such as fungi, insects, humidity, and fire. For reducing these influences, wood and woodbased panels can be treated with various chemicals, including a PVC-based layer and various dyes, or coated with wood veneers or foils, depending on the structure of the material and its intended use. Generally, the panels are coated in order to increase the areas in which they can be used, improve their strength characteristics, and enhance their aesthetic appeal (Thoemen et al. 2010;İstek et al. 2010).The coating process is a technique in which various materials can be applied to the surfaces of paper, paper board, wood, and wood panels. The materials used for coating may include clay, calcite, some other pigments, an adhesive mixture, or some other suitable materials. Thus, the coatings that are used improve the properties of the coated materials, such as their aesthetic appeal, smoothness, opacity, quality of the applied colors, or other surface properties. The term 'coating process' is also used with reference to lacquered and varnished wood and wood panels (Lavigne 1986). Currently, clay and calcite are commonly used as coating materials for many applications because they increase the strength and the physical and surface properties of the materials to which they are applied. Fire retardants (FRs), such as borax (BX), boric acid (BA), and zinc borate (ZB), can be added to the coating mixture to increase the desirable combustion properties of materials, depending on their intended uses (Casey 1961). Generally, chemicals used as FRs may affect many properties of materials. It was found that FRs combined with boron reduced the mechanical properties and surface quality of wood panels (Baysal et al. 2006;Ustaömer 2008). Generally, FRs do not prevent the burning of wood and wood panels. Some of them do increase the temperature at which combustion can occur. Thus, the rate at which a fire will propagate is decreased due to the increased ignition temperature and the time required to reach that temperature (Örs et al. 1999). Some FRs, when in wood, reduce the temperature, resulting in thermal degradation of the wood. The result is pyrolysis gases that are less combustible (and more char), which then results in less flaming combustion to propagate the flames. Therefore, for increasing the combustion performance of wood and wood panels, they must be coated with various

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“…Fire retardants (FRs) for plastics and WPCs are completely different from those of wood materials 1. Wood is typically impregnated with solutions of FRs, commonly salts, such as monoammonium (MAP) and diammonium phosphate (DAP), ammonium sulfate, zinc chloride, sodium tetraborate, boric acid, and guanylurea phosphate 2–5. In plastics and WPCs, however, FRs are added as solids directly into the formulation.…”

Section: Introductionmentioning

confidence: 99%

Properties of flat‐pressed wood plastic composites containing fire retardants

Ayrılmış

Benthien²,

Thoemen

et al. 2011

J of Applied Polymer Sci

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This study investigated physical, mechanical, and fire properties of the flat-pressed wood plastic composites (WPCs) incorporated with various fire retardants (FRs) [5 or 15% by weight (wt)] at 50 wt % of the wood flour (WF). The WPC panels were made from dryblended WF, polypropylene (PP) with maleic anhydridegrafted PP (2 wt %), and FR powder formulations using a conventional flat-pressing process under laboratory conditions. The water resistance and strength values of the WPC panels were negatively affected by increasing the FR content as compared to the WPC panels without FR. The WPC panels incorporated with zinc borate (ZB) gave an overall best performance in both water resistance and strength values followed by the panels containing magnesium hydroxide (MH) and ammonium polyphosphate (APP). For these three FR's, the best fire resistance as measured in the cone calorimeter was obtained with the 15 wt % APP treatment and then followed by 15 wt % ZB, or 15 wt % MH formulations.

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Fire and bending properties of blockboard with fire retardant treated veneers

Cited by 20 publications

References 3 publications

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

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

Combustion properties of medium-density fiberboards coated by a mixture of calcite and various fire retardants

Properties of flat‐pressed wood plastic composites containing fire retardants

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