• Title, Summary, Keyword: particleboard

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Effects of Cyclic Humidification on Dimensional Stability of Particleboard and Com-Ply (주기적(週期的) 조습처리(調濕處理)가 파티클보드와 콤플라이의 치수 안정성(安定性)에 미치는 영향(影響))

  • Lee, Phil-Woo;Kim, Dae-Jun;Park, Hee-Jun
    • Journal of the Korean Wood Science and Technology
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    • v.20 no.3
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    • pp.29-37
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    • 1992
  • This research was carried out to investigate the effects of cyclic humidification on the dimensional stability of particleboard manufactured according the three specific gravity levels and com-ply fabricated with a core of particleboard and veneer or plywood as the face and back materials. Both the particleboard and com-ply were subjected to four cycles of 50-90-50% relative humidity. The results are summarized as follows: Particleboard and com-ply followed a clear pattern of increasing dimensions and weight on the adsorption cycle and decreasing dimensions and weight on the humidification cycle. After the fourth cycle, the dimensions and weight of both particleboard and com-ply were greater than those originally measured. The greater part of increase in occurred during the first humidification cycle. The specific gravity of particleboard has a significant effect thickness and volume change. The dimensional stability of com-ply was better than that of particleboard. In addition, the dimensional stability of com-ply bonded with plywood was better than that of com-ply bonded with veneer.

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The Effect of Diameter and Prehole Clearance for Wooden Dowel on the Withdrawal Loads of Domestic Particleboard (국내산 파티클보드에 대한 나무못의 직경과 천공여척이 나무못 유지력에 미치는 영향)

  • Kim, Birm-June;Cha, JaeKyung
    • Journal of the Korea Furniture Society
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    • v.28 no.1
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    • pp.53-59
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    • 2017
  • Wooden dowels are commonly used to join the particleboard members together in many types of structures, But little information is available concerning their holding properties in domestic particleboard. This study was performed to determine the withdrawal loads and strengths on the effect of diameter of dowel and hole clearance. The test block was manufactured from 15 mm thick domestic particleboard. The dowel was manufactured 6, 8 and 10 mm diameters from korean castanea, korean pine and tuliptree. Research reported here indicates that withdrawal loads increase, but withdrawal strengths decrease, as the dowel diameter increases. This study also indicates that dowel withholding load and strength for particleboard less decrease than those for domestic wood as a hole clearance decreases.

Effects of Paper Sludge Addition on Formaldehyde Emission, and Physical and Mechanical Properties of UF-Particleboard (제지 슬러지의 첨가가 요소수지 파티클보드의 포름알데히드 방산 및 물리적, 기계적 성질에 미치는 영향)

  • Kim, Dae-Jun;Lee, Phil-Woo
    • Journal of the Korean Wood Science and Technology
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    • v.22 no.1
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    • pp.44-53
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    • 1994
  • This research was carried out to investigate the effect of paper sludge addition on formaldehyde emission, and physical and mechanical properties of UF-particleboard. In order to investigate the effect of paper sludge addition to resin, particleboards were bonded with urea-formaldehyde resins containing 5, 10, 15% paper sludge powders of three types(A Type: -200 mesh, B Type: -100~+200 mesh. C Type: -50~+100 mesh), based on weight of resin solid. Also the effect of paper sludge addition to furnish was studied from particleboards fabricated with ratios of sludge to particle of 5:95, 10:90, 15:85 based on oven-dry weight. Tests were conducted on the manufactured particleboards to determine formaldehyde emission, bending properties, internal bond strength and thickness swelling. The obtained results were summarized as follows: The addition of paper sludge powder to resin yielded a higher pH of cured resin. Formaldehyde emission decreased with the increase of paper sludge powder addition to resin and paper sludge composition ratio to furnish. Particleboard bonded with urea-formaldehyde resin containing paper sludge powder and particleboard mixed with paper sludge have similar bending properties(MOR, MOE) and thickness swelling compared with control particleboard. Internal bond strength of particleboards treated with paper sludge were lower than that of control particleboard. The use of paper sludge as scavenger was achieved reduction of formaldehyde emission without depression of physical and mechanical properties of particleboard. Also the use of paper sludge was able to concluded that there is possibility of partial substitution of wood particle materials.

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The effect of mechanical properties on the particleboard reinforced with fiberglass layer number (파티클보드에 보강된 유리섬유의 layer 수가 기계적 성질에 미치는 영향)

  • Cha, Jae-Kyung
    • Journal of the Korea Furniture Society
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    • v.21 no.5
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    • pp.347-353
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    • 2010
  • This research examined the technical feasibility of composite that had 2- and 3- layers of fiberglass reinforcement to enhance the load carrying capacity of particleboard. Specimens were prepared from commercial particleboard. Results indicated that bending properties, hardness and impact bending energy increased as the number of layers of fiberglass reinforcement increased. The wood screw withdrawal load only decreased at the 3-layer of fiberglass reinforcement. The technique developed by this study may increase an opportunity to use particleboard for structural purposes.

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Effect of Several Exterior Adhesive Types on Dimensional Stability of Bamboo Oriented Particleboard

  • Iswanto, Apri Heri;Munthe, Rensus;Darwis, Atmawi;Azhar, Irawati;Susilowati, Arida;Prabuningrum, Dita Sari;Fatriasari, Widya
    • Korean Journal of Materials Research
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    • v.29 no.5
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    • pp.277-281
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    • 2019
  • The objective of this research is to evaluate the effect of adhesive types on dimensional stability of bamboo-oriented particleboard. The materials used in this research are bamboo tali(Gigantochloa apus J.A & J.H. Schult. Kurz), UF/MDI(8, 10, 12 % level), and MF, MDI, and PF at 7 % level. Particle and adhesive are mixed using a blending machine; then, mat forming and hot pressing processes are performed using adhesive-suitable temperature and time references. MDI resin is set at $160^{\circ}C$ temperature for 5 minutes. PF resin and MF resin are pressed at $170^{\circ}C$ for 10 minutes, and $140^{\circ}C$ for 10 minutes, respectively, while UF/MDI sets at temperature of $140^{\circ}C$ for 10 minutes. The results show that particleboard using PF resin produces the lowest thickness swelling value. The particleboard using UF/MDI resin also produces good response for thickness swelling value. Interesting things happen in that UF/MDI adhesive produces a thickness swelling value better than that of MDI resin. FTIR analysis on particleboard bonded by UF/MDI resin combination shows the presence of carbonyl group C=O vibration on multi substitution of urea at wave number of around $1,700cm^{-1}$.

A Study on the Estimating the Mechanical Properties of Three-Layer Particleboard (3층(層) 파티클보드의 기계적(機械的) 성질(性質) 예측(豫測)에 관(關)한 연구(硏究))

  • Park, Hee-Jun;Lee, Phil-Woo;Chung, Ju-Sang
    • Journal of the Korean Wood Science and Technology
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    • v.21 no.4
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    • pp.64-72
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    • 1993
  • Mechanical properties of 15 mm thick, three-layer particleboard were studied by varying resin content, specific gravity, mat moisture content, pressing time and pressing temperature. Based on the results of the study, Multiple regression models were developed to estimate the mechanical properties of three-layer particleboard. The results of this study showed the mechanical properties of particleboard were highly related with resin content. specific gravity and mat moisture content in decending order. The mechanical properties were able to estimated as the linear function of resin content and specific gravity. However, the effects of change in mat moisture content on the mechanical properties showed a non-linear pattern. The mechanical properties curves over mat moisture content reached peaks at 15 %, and then decreased at 18 % and 21 % of mat moisture contents. On the other hand, the effects of pressing time and pressing temperature on the mechanical properties of particleboard were not significant.

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Effect of Particle Pre-Treatment on Properties of Jatropha Fruit Hulls Particleboard

  • Iswanto, Apri Heri;Febrianto, Fauzi;Hadi, Yusuf Sudo;Ruhendi, Surdiding;Hermawan, Dede;Fatriasari, Widya
    • Journal of the Korean Wood Science and Technology
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    • v.46 no.2
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    • pp.155-165
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    • 2018
  • The objective of the research was to evaluate the effect of particle pre-treatment on physical, mechanical, and durability of jatropha fruit hulls (JFH) particleboard. The pre-treatments included were immersing in cold water, hot water, and acetic acid solution. After each treatment, the particles were dried up to 3% moisture content. Urea-formaldehyde (UF) resin was used to fabricate particleboards with board size, thickness and density target of 25 cm by 25 cm, 0.80 cm, and $0.70g/cm^3$, respectively. Board pressed at $130^{\circ}C$ for 10 minutes, and $25kg/cm^2$ pressure. The evaluation of particleboard followed the JIS A 5908-2003. Whilist their resistance to subterranean termite test (mass loss, mortality, antifeedant value and feeding rate) refers to the Indonesian standard (SNI 01.7207-2006). The physical and mechanical properties of particleboards showed that all pre-treatments decreased the pH of particles. Overall, all particle immersing treatments resulted of better physical and mechanical properties of particleboard than those of untreated ones. The acetic acid treatment resulted the best physical and mechanical properties of particleboard. Based on the mass loss of JFH particleboard, hot water and acetic acid treated particleboards were classified into weak resistance to subterranean attack. The other two treatments were classified into very weak resistance. Hot water treated particleboard provided the highest mortality and antifeedant as much as 87.40% and 34.20%, respectively. Based on antifeedant classification, hot water treated particleboards were classified into moderately strong resistance, while other treatments were categorized into weak resistance. The lowest feeding rate value ($45.30{\mu}g/termite/day$) was attained by hot water treatment.

Emission Characteristics of Far-infrared Ray, Formaldehyde, Volatile Organic Compounds, and Deodorization Rate of Particleboard Prepared from Xylem Part of Broussonetia Kazinoki Sieb (닥나무 목질부로 제조된 파티클보드의 원적외선, 폼알데하이드, 휘발성유기화합물 방출 및 탈취율)

  • Oh, Seung-Won
    • Journal of the Korean Wood Science and Technology
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    • v.42 no.3
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    • pp.223-230
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    • 2014
  • This study examined emission characteristics of far-infrared ray, formaldehyde, volatile organic compounds and deodorization rate of particleboard prepared at different target board densities and resin content levels, using the xylem part of Broussonetia Kazinoki Sieb. The deodorization rate increased, as the target density of board and resin content increased. Emission rates of the far-infrared ray and total volatile organic compounds (TVOCs) were 0.892~0.899, and $0.074mg/m^2{\cdot}h$ for particleboard prepared with the resin content of 13% and target density of $0.6g/cm^3$ while the deodorization rate was 80~90% for the same particleboard. The formaldehyde emission factor ranged from $0.004mg/m^2{\cdot}h$ to $0.006mg/m^2{\cdot}h$ for all particleboard fabricated at different resin content and target densities. These results indicate that particleboard prepared from the xylem part of Broussonetia Kazinoki Sieb have a potential as a building construction material.

A Study on the Physical and Mechanical Properties of the Board Composed of Wood Particle and Steel Wire (목재(木材)파아티클과 철선복합(鐵線複合)보오드의 물리적(物理的) 및 기계적(機械的) 성질(性質)에 관(關)한 연구(硏究))

  • Park, Heon
    • Journal of the Korean Wood Science and Technology
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    • v.16 no.3
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    • pp.22-37
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    • 1988
  • In tendancy of manufacturing beam with laminating particleboard, it was thought that if the properties, especially mechanical properties, of particleboard be reinforced, the mechanical properties of particleboard-laminated beam would be also improved. So in this study the particleboard was reinforced with composing of wood particle and steel wire. This study was carried out to obtain the basic physical and mechanical properties of board composed of wood particle and steel wire, especially tensile strength and compressive strength which are the important factors of the lamina of beam, in order to estimate whether the board, composed of wood particle and steel wire could be to improve the properties of the particleboard- laminated beam. The results obtained were summarized as follows: 1. The board composed of wood particle and steel wire in accordance with lower board density took better thickness swelling. 2. The board with lower board density was improved in higher value of tensile strength with more steel wires in prescribed cross section area of the board. for example, the board of density 0.5 showing 140% improved value. 3. In compressive strength, the board with lower board density was also improved in hjgher value with more steel wires in prescribed cross section area.

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Effects of Antimony Trioxide-containing Coating on Fire Retardancy of Wood-based Materials (Antimony Trioxide가 첨가(添加)된 내화도료(耐火塗料)의 도막(塗膜)이 목질(木質) 판상재료(板狀材料)의 내화성(耐火性)에 미치는 영향(影響))

  • Yun, Young-Ki;Lee, Phil-Woo
    • Journal of the Korean Wood Science and Technology
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    • v.20 no.2
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    • pp.31-42
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    • 1992
  • In this study, the relative effectiveness of antimony trioxide-containing coat on fire retardancy of plywood, particleboard and medium density fiberboard was investigated and compared through ISO ignition test and inclined panel test with non-coated ones. The results obtained were summarized as fallows: Any treated materials was not ignited in inclined panel test with 5 minutes, but only particleboard among treated ones burned in ISO ignition test with fairly delayed time. The weight loss rate of plywood decreased with the increased addition level of fire-retardant and the least values were obtained in particleboard and MDF at addition level of 7% and 5% respectively. Carbonized area of wood based materials decreased with the increased addition level of fire retardant. The temperatures of back in plywood, particleboard treated with fire-retard ant coat containing 7% $Sb_2O_3$ showed the lowest but MDF did not show any effectiveness with the increased addition level. The first flash time of plywood treated with fire retardant coat containing 9% $Sb_2O_3$, MDF and particleboard treated with fire retardant coat containing 7% $Sb_2O_3$ were 257sec., 286.4sec., 165.4sec. respectively.

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