Effects of natural-resource-based scavengers on the adhesion properties and formaldehyde emission of engineered flooring

Kim, Jong Sung; Eom, Young Geun; Kim, Sumin; Kim, Hyun Joong

doi:10.1163/156856107780684602

Cited by 18 publications

(8 citation statements)

References 7 publications

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“…This is due to the tannin in the bark, which improves the adhesion properties. The same results were observed by other authors [61,62]. However, a further increase in the bark/adhesive ratio (K20) results in a slight decrease in the perpendicular tensile strength.…”

Section: Resultssupporting

confidence: 90%

Functionality of Beech Bark in Adhesive Mixtures Used in Plywood and Its Effect on the Stability Associated with Material Systems

et al. 2019

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The results of research into utilizing grinded beech bark in order to substitute commonly used fillers in urea formaldehyde (UF) adhesive mixtures to bond plywood are presented in the present study. Four test groups of plywood with various adhesive mixtures were manufactured under laboratory conditions and used for experimentation. Plywood made using the same technology, with the common filler (technical flour), was used as a reference material. Three different concentrations of grinded beech bark were used. The thermal conductivity of the fillers used, viscosity and its time dependence, homogeneity and the dispersion performance of fillers were evaluated in the analysis of adhesive mixture. The time necessary for heating up the material during the pressing process was a further tested parameter. The produced plywood was analyzed in terms of its modulus of elasticity, bending strength, perpendicular tensile strength and free formaldehyde emissions. Following the research results, beech bark can be characterized as an ecologically friendly alternative to technical flour, shortening the time of pressing by up to 27%. At the same time, in terms of the statistics, the mechanical properties and stability of the material changed insignificantly, and the formaldehyde emissions reduced significantly, by up to 74%. The utilization of bark was in compliance with long-term sustainability, resulting in a decrease in the environmental impact of waste generated during the wood processing.

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Section: Resultssupporting

confidence: 90%

Functionality of Beech Bark in Adhesive Mixtures Used in Plywood and Its Effect on the Stability Associated with Material Systems

et al. 2019

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“…These considerations have led to an intensified interest in the indoor environment. Residence products, especially construction materials are a major source of formaldehyde emission in the indoor environment (Kim et al , 2007; Brown, 1999). Formaldehyde‐based resins, however, has advantage super bonding properties and is inexpensive.…”

Section: Introductionmentioning

confidence: 99%

Eco‐friendly tannin‐phenol formaldehyde resin for producing wood composites

Jahanshaei

Tabarsa

Asghari

2012

Pigment &Amp; Resin Technology

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Purpose -The purpose of this paper is to describe the development of an eco-friendly tannin-phenol formaldehyde resin (PFT) applicable in the wood composite industry. Design/methodology/approach -The bark of oak (Quercus castaneifolia) contains a large amount of condensed tannin. Condensed tannin, with a large amount of Catechol groups was considered for reducing the formaldehyde emission level on the adhesive system. Physical characteristics of synthesized PFT resin were evaluated. Findings -For optimal extraction, three solvents were used in the extraction process. The results showed that a mixture of water-methanol (1:1 v/v) as extracting solvent is the best solvent and yields about 14 per cent tannin based on dry weight of bark. For producing tannin phenol formaldehyde adhesive, 10 per cent, 20 per cent and 30 per cent (based on PF dry weight) of PF, substituted with natural extracted tannin. For evaluating PFT performance effects of percentage amount of substitution tannin content on the gel time, viscosity, pH, and density of adhesives were evaluated. Based on emission test (JIS A 1460(JIS A -2001 formaldehyde emission of PFT 10 per cent, 20 per cent and 30 per cent were 1.13, 1.12 and 0.4 mg/100 g, which is very low compared with tannin-free PF.Research limitations/implications -Tannin-PF adhesive compared to PF adhesive had lower PH, higher viscosity and shorter gel time. Practical implications -The method developed provides a simple and excellent renewable resource "tannin" which can be used or partially substituted in phenol formaldehyde adhesive. Originality/value -Results showed that replacing PF for tannin reduces modulus of rupture (MOR) and modulus of elasticity (MOE) slightly but has significant effects on IB, water absorption and thickness swelling.

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“…To measure the TVOC and formaldehyde emission from interior materials, paints and adhesives have been studied using a range of experimental instruments. The formaldehyde concentration from wood-based panels was determined using desiccator and perforator test methods [5,6]. In the case of the TVOC and formaldehyde emission factors, a 20 L small chamber, field and laboratory emission cell (FLEC) and VOC Analyzer are used to examine the low pollution levels in indoor air [7,8].…”

Section: Test Condition Tementioning

confidence: 99%

Reduction of VOC emission from natural flours filled biodegradable bio-composites for automobile interior

Lee

Kim

et al. 2011

Journal of Hazardous Materials

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Effects of natural-resource-based scavengers on the adhesion properties and formaldehyde emission of engineered flooring

Cited by 18 publications

References 7 publications

Functionality of Beech Bark in Adhesive Mixtures Used in Plywood and Its Effect on the Stability Associated with Material Systems

Functionality of Beech Bark in Adhesive Mixtures Used in Plywood and Its Effect on the Stability Associated with Material Systems

Eco‐friendly tannin‐phenol formaldehyde resin for producing wood composites

Reduction of VOC emission from natural flours filled biodegradable bio-composites for automobile interior

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