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RISS 인기검색어
- 검색키워드
- 저자 : ( Eka Novriyanti ) (검색결과 3 건)
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( Tekat Dwi Cahyono ),( Wayan Darmawan ),( Eka Novriyanti ) 한국목재공학회 2018 한국목재공학회 학술발표논문집 Vol.2018 No.1
A study to determine the quality of laminated veneer lumber (LVL) from samama wood (Anthocephalus macrophyllus) was carried out. Samama is a fast growing endemic wood in the eastern Indonesia. Factorial of 3 factors in RAL design was used to investigate the influence of veneer thickness, juvenile proportion and veneer lay-up to the quality of the resulted LVL samama. The veneer thicknesses were 1.5 mm and 3.0 mm. Juvenile proportions were arranged in 5 levels which were 100% of juvenile veneer, 100% of mature veneer, and combination of both juvenile and mature with juvenile proportion of 14%, 43% and 71%. Two veneer lay-up used in this study were loose side met loose side and tight side met loose side. The result of the study showed the vary density of LVL by the different proportion of juvenile and veneer thickness. This factor also affected the other physical traits. Shear strength of the LVL was equal with the wood, yet MOE and MOR were affected by juvenile proportion and veneer lay-up. LVL developed from 100% of mature veneer gave the best mark of MOE and MOR, although there was no significant difference in quality with the other tested juvenile proportions.
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Tekat Dwi Cahono,Imam Wahyudi,Trisna Priadi,Fauzi Febrianto,Effendi Tri Bahtiar,Eka Novriyanti 한국목재공학회 2016 목재공학 Vol.44 No.6
Relatively little information is available regarding the correlation between wood and veneer quality, especially for Samama wood, an endemic wood species in eastern Indonesia. This study addresses the quality of 8 years old Samama wood and its effect on the veneer quality. Samama wood quality was determined by evaluating its specific gravity, moisture content, fiber dimensions, and microfibril angle from pith toward bark. Meanwhile, veneer quality was assessed by examining veneer thickness and lathe check characteristics. Geometry factor model was constructed to elaborate the quantities of lathe check from pith toward bark. Results show that fair variations of veneer thickness, ranging from 1.5 mm to 3.0 mm, could be obtained from Samama wood. The quantity, depth, and length of lathe check were noticeably decreasing toward bark. Further, in the same manufacturing process, geometry factor was determined as the dominant factor over other wood properties in affecting the frequency of lathe checks from pith towards bark. These facts should be put into consideration in producing veneer from Samama wood. Moreover, these results enlighten the potential of Samama wood as plywood and other excellent veneer-based products.
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( Hikma Yanti ),( Muh Yusram Massijaya ),( Tekat Dwi Cahyono ),( Eka Novriyanti ),( Apri Heri Iswanto ) 한국목재공학회 2019 목재공학 Vol.47 No.2
This research presents an improvement of the physical and mechanical properties of composite board (com-ply) made of Oriented Strand Board (OSB) coated with wood veneer of Pine (Pinus merkusii), Avocado (Persea Americana) and Mahogany (Swietenia mahogany). 1.5 mm thick veneers of those three wood types were adhered to the surface of OSB using two adhesive types: epoxy and isocyanate. The adhesive with the glue spread of 250 g m<sup>-2</sup> applied using single glue line was spread and then cold pressed with the pressure of 15 kg cm<sup>-2</sup> for 3 hours. The research result showed an improving dimension stability of com-ply, but not found on all parameters of physical property test. The moisture content seemed to be influenced by the com-ply type, yet not related to its thickness swelling, water absorption and linear expansion. The exception took place in the parallel linear expansion when immersed for 2 hours. The highest to the lowest increases of MOE and MOR were consecutively found on OSB coated with wood veneer of Pine, Mahogany and Avocado. However, the increases were statistically insignificant. The highest increasing screw hold power was found at the com-ply type AE (avocado veneer and epoxy adhesive) that was by 28%.
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