Melamine‐bridged alkyl resorcinol modified urea–formaldehyde resin for bonding hardwood plywood

Hse, Chung Y.; Higuchi, Mitsuo

doi:10.1002/app.31766

Cited by 9 publications

(4 citation statements)

References 3 publications

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“…With the consideration of lower cost and better performance of MUF resins than MF or PF resin adhesives, research have been focused on, their synthesis method Mao et al, 2013), structure and properties Park, 2017, 2016;Liu et al, 2016), thermal behavior (Siimer et al, 2010), hydrolytic stability (Park et al, 2009), and their performance in plywood (Su et al, 1998;Hse and Higuchi, 2010).…”

Section: Introductionmentioning

confidence: 99%

Effect of Synthesis Method and Melamine Content of Melamine-Urea-Formaldehyde Resins on Bond-Line Features in Plywood

Jeong¹,

Park²,

Lee³

et al. 2019

Journal of the Korean Wood Science and Technology

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This work examined effects of the synthesis method and melamine content of melamine-urea-formaldehyde (MUF) resins on the bond-line features (i.e. resin penetration and bond-line thickness) in plywood. Two synthesis methods (MUF-A and MUF-B) and three melamine contents (5, 10, and 20%) were employed to prepare MUF resins. The MUF-A resins at three melamine contents were prepared by a simultaneous reaction of melamine, urea, and formaldehyde, while the MFU-B resins were prepared by reacting melamine at the same levels with formaldehyde followed by urea. The results showed that higher melamine content increased the viscosity of MUF-A and MUF-B resins. The resin penetration of MUF-A resins decreased by 48% while those of MUF-B resins increased by 16% at 20% melamine content. As a result, the MUF-A resins had greater bond-line thickness than those of MUF-B resins as the melamine content increased. The MUF-B resins resulted in thinner bond-line and greater resin penetration compared to those of MUF-A resins. The results suggested that MUF-B resins prepared with 20% melamine content had a proper combination of resin penetration and bond-line thickness that could produce plywood panel with a better adhesion performance.

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Section: Introductionmentioning

confidence: 99%

Effect of Synthesis Method and Melamine Content of Melamine-Urea-Formaldehyde Resins on Bond-Line Features in Plywood

Jeong¹,

Park²,

Lee³

et al. 2019

Journal of the Korean Wood Science and Technology

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“…Formaldehyde resin such as powdered MUF (MUF-P) used in this study is widely used in previous studies to strengthen various types of material and soil particulary in the area of rapid application for soil stabilisation method. MUF-P is also the most suitable type of MUF used for dry mixing technique for peat soil stabilisation purpose [2][3][4]. Commonly, peat soil experiences large settlements in comparison to other soft soil such as clays when subjected to loading [5].…”

Section: Introductionmentioning

confidence: 99%

Compressibility Characteristics of Peat Soil Treated with MUF-P Resin

Daud

2021

SSP

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Peat is commonly described as a soil that is possess to high rate of compressibility due to present of high organic substance derived from plant origins. Peat soil naturally associated with settlement and consolidation characterized by its high initial void ratio, organic content and water holding capacity. This paper presents the performance of peat soil treated with powdered melamine urea formaldehyde resin (MUF-P) in term of compression and consolidation behaviour under standard compressibility test. In this study, series of one-dimensional oedometer test were carried out with the load increment method from 12.5 to 400 kPa after 24 hours of each loading. Peat soils under high moisture condition were mixed with MUF-P within 3 days of stipulated periods of curing times. The results indicate that increasing the MUF-P proportion has improved the compressibility characteristics of peat soil. The result shows the values of compression index (Cc) decreased from 4.12 to 0.9, and secondary compression index (Cα) were also decreased from the range of 0.026 to 0.320 to the range of 0.080 to 0.161 with the increase of peat MUF-P proportions up to maximum 350 kg/m3.

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“…Thus, this newer technology can be performed at speeds up to 200 press cycles per hour. Overall, short-cycle hot pressing was achieved by the development of technological equipment and also by using new types of reactive MF resins (Pizzi 1994;Kamoun et al 2003;Hse et al 2008;Biron 2014).…”

Section: Introduction Surface Lamination Of Wood-based Compositesmentioning

confidence: 99%

Anti-bacterial and anti-mold efficiency of ZnO nanoparticles present in melamine-laminated surfaces of particleboards

Nosál

Reinprecht

2017

BioRes

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Lamination is one of the most widely used techniques for the surface treatment of wood-based composites such as particleboards, fiberboards, etc. It is usually carried out using décor papers impregnated with amino thermosetting resins, mostly melamine-formaldehyde, urea-formaldehyde, or their mixture. Conventional laminates with non-bioactive surfaces are not able to reduce or stop microbial growth when contaminated with organic substances. In this work, zinc oxide (ZnO) nanoparticles were applied into their surface structure to improve their anti-bacterial and anti-mold properties. Melamine-formaldehyde (MF) resin, for the white décor paper impregnation, was modified with ZnO in amounts of 0.1 wt.%, 0.3 wt.%, 0.6 wt.%, and 1 wt.% and pressed onto particleboards. The presence of ZnO in the melamine-laminated surfaces somewhat improved their resistance to the Gram-positive bacteria Staphylococcus aureus (by 20.7% or 9.5%). However, the improvement was considerable (~65% or 46.8%) against the Gram-negative bacteria Escherichia coli. The presence of ZnO in MF resins increased the anti-mold resistance of the intentionally contaminated laminated surfaces against the microscopic fungi Aspergillus niger and Penicillium brevicompactum at most by approximately 50%. ZnO nanoparticles had none or only a small negative effect on the resistance of the laminated surfaces towards aggressive chemicals and dry heat 180 °C, and their abrasion resistance decreased at most by approximately 17%.

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Melamine‐bridged alkyl resorcinol modified urea–formaldehyde resin for bonding hardwood plywood

Cited by 9 publications

References 3 publications

Effect of Synthesis Method and Melamine Content of Melamine-Urea-Formaldehyde Resins on Bond-Line Features in Plywood

Effect of Synthesis Method and Melamine Content of Melamine-Urea-Formaldehyde Resins on Bond-Line Features in Plywood

Compressibility Characteristics of Peat Soil Treated with MUF-P Resin

Anti-bacterial and anti-mold efficiency of ZnO nanoparticles present in melamine-laminated surfaces of particleboards

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