Effects of high temperature kiln drying on the practical performances of Japanese cedar wood (Cryptomeria japonica) I: changes in hygroscopicity due to heating

Obataya, Eiichi; Shibutani, Sakae; Hanata, Kensuke; S, Doi

doi:10.1007/s10086-005-0716-9

Cited by 29 publications

(17 citation statements)

References 8 publications

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“…Serious surface checking during drying is a common phenomenon for Japanese cedar lumber because of its high moisture content which requires long drying time with a steep moisture gradient (Nakada et al 1998). Thus, kiln drying of this lumber is still a problem facing the Japanese wood industry (Obataya et al 2006). Among various methods so far proposed, high-temperature drying is an effective means of preventing surface cracks (Nakada et al 1998, Obataya et al 2006, however, the color of wood may change during drying (McCurdy et al 2006).…”

Section: Resultsmentioning

confidence: 99%

Effect of steam injection re-drying of Japanese cedar on preservative leaching after passive impregnation

Ando

Islam

Yamauchi

et al. 2012

Wood Material Science & Engineering

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This study investigated the effects of steam injection re-drying on the leaching of copper azole type B (CAz-B) preservative from green and kiln dried Japanese cedar (Cryptomeria japonica (L.f.) D.Don) lumber treated by the passive impregnation method. The leaching and fungal treatments were performed according to the JIS Z 2101-1994 standard. Sixteen hours of steam injection re-drying reduced the moisture content from 152 to 82% and 195 to 55% for initially green and dry lumber, respectively. Preservative retention was higher in the dry lumber (5.21 kg/m 3 ) compared with the green (4.66 kg/m 3 ), however, leaching percent was similar for both types. Preservative leaching and mass loss due to fungal attack were significantly lower in the lumber re-dried by steam injection compared with air dried. Thus, steam injection re-drying after passive impregnation treatment could be a step toward fixing CAz-B preservative in Japanese cedar lumber.

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Section: Resultsmentioning

confidence: 99%

Effect of steam injection re-drying of Japanese cedar on preservative leaching after passive impregnation

Ando

Islam

Yamauchi

et al. 2012

Wood Material Science & Engineering

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“…Although significant degradation in hemicelluloses and lignin happens at temperatures higher than what was applied in this study, small degrees of changes can happen at lower temperatures if applied for longer time durations (Placet et al 2008, Obataya et al 2006a. Specific modulus of elasticity is also decreased by steam heat treatment (Obataya et al 2006b), or increased by heat treatment in the absence of water (Kubojima et al 2000).…”

Section: Effect Of Water-based Treatments On Physico-mechanical Propementioning

confidence: 84%

The effect of traditional hygro-thermal pretreatments on the acoustical characteristics of white mulberry wood (Morus alba)

Golpayegani

Brémaud

Thévenon

et al. 2015

Maderas, Cienc. tecnol.

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The wood used in making musical instruments usually undergoes pre-treatments or conditioning. Some processes have resulted from laboratory research, while many treatments are applied by craftsmen using traditional methods that have not yet been scientifically assessed. This paper is based on laboratory methods which simulate hydrothermal pre-treatments traditionally applied by Iranian lute makers to mulberry (Morus alba), an important wood for lutes from the Middle East to Japan. By applying a cyclic process, drying (60°C) and ambient re-conditioning, which mimics wood seasoning and short-term aging, the damping coefficient (tanδ) was decreased down to 10% without negatively affecting specific modulus of elasticity (E'/ρ). Long-term (up to 4 months) soaking in cold water removed extractives, and decreased density as well as E'/ρ, but did not affect tanδ. Short-term hot water treatment removed as many extractives, but caused a smaller decrease in E'/ρ than cold water, and significantly increased tanδ. This paper helps to clarify some traditional processes used by instrument makers, and can provide a basis for necessary cross-cultural scientific studies in the future.

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“…Further, the benefi ts of thermal-treatment seem more apparent when wood species of higher quality are treated (results published in Thompson, 2006). Obataya et al (2003Obataya et al ( , 2006aObataya et al ( , 2006b showed the infl uence of high temperature kiln drying on the practical performances of Japanese cedar wood. This heat treatment is sometimes regarded as an accelerated ageing.…”

Section: Overview 2 Pregled Literaturementioning

confidence: 99%

Thermally Modified Wood for Use in Musical Instruments

Pfriem

2015

Drvna ind.

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Effects of high temperature kiln drying on the practical performances of Japanese cedar wood (Cryptomeria japonica) I: changes in hygroscopicity due to heating

Cited by 29 publications

References 8 publications

Effect of steam injection re-drying of Japanese cedar on preservative leaching after passive impregnation

Effect of steam injection re-drying of Japanese cedar on preservative leaching after passive impregnation

The effect of traditional hygro-thermal pretreatments on the acoustical characteristics of white mulberry wood (Morus alba)

Thermally Modified Wood for Use in Musical Instruments

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