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Articles 7 Documents
Search results for , issue "Vol 22, No 3 (2004): Jurnal Penelitian Hasil Hutan" : 7 Documents clear
PENGARUH PERLAKUAN PENDAHUULAN TERHADAP KECEPATAN PENGERINGAN KAYU MANGIUM Krisdianto, Krisdianto; Malik, Jamaludin
Jurnal Penelitian Hasil Hutan Vol 22, No 3 (2004): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2624.909 KB) | DOI: 10.20886/jphh.2004.22.3.135-142

Abstract

One of the problems faced in mangium (Acacia mangium Willd.) wood utilization is its low drying rate. Some pre-treatment methods: steaming, boiling and microwave heating have been examined to improve its drying time. After treated with steaming, boiling and microwave heating, six various dimension of mangium samples were dried in oven. During drying process, the samples were weighed two hoursly in the first 24 hours to determine the pattern of moisture reduction. Microwave heating and boiling enhance its drying time in all sample sizes, while steaming was only effective for samples with thickness below 5 cm. Boiling leads to generate drying defects such as wrapping, twist, bow, and surface checks, while microwave heating and steaming methods caused minor drying defects.
KETERAWETAN 41 JENIS KAYU TERHADAP BAHAN PENGAWET CCB Abdurrohim, Sasa; Sudika, Didik Achmad
Jurnal Penelitian Hasil Hutan Vol 22, No 3 (2004): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2476.647 KB) | DOI: 10.20886/jphh.2004.22.3.167-174

Abstract

Most of the Indonesian wood species exhibit a wide differences in treatability. This may reduce effectiveness in loading several wood species simultaneously. This study investigated treatability of 41   wood  species   through  full-cell   process   using  CCB  (copper-chrome-boron)  preservatives.Representative wood samples, measuring 5 cm wide, 5 cm thick and I 00 cm long were preparedfrom each species and then remain to reach the air-dry condition.  Pressures imposed during the process were consisted of initial and final vacuum al 500 mm Hg for  15 minutes, and a hydraulicpressure of 10 atmospheresfor 60 minutes.The results revealed that 20 of the study species were classified easy, I 2 species were moderate, 5 species were difficult, and the remaining 4 species were very difficult.  Wood species within the class could be treated simultaneously. Results also indicated that there were great variations of chemical retention within the same class of penetration.
PEMANFAATAN LIGNIN DARI LINDI HITAM UNTUK PEMBUATAN KOPOLIMER LIGNIN RESORSINOL FORMALDEHIDA SEBAGAI PEREKAT KAYU LAMINA Santoso, Adi
Jurnal Penelitian Hasil Hutan Vol 22, No 3 (2004): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3307.45 KB) | DOI: 10.20886/jphh.2004.22.3.143-154

Abstract

Black liquor as a waste of (yielded by) pulp factories in Indonesia was estimated to reach more than 2.3 million tonnes/year. The use of this liquid has long been explored for wood adhesive, particularlyfor glue cold setting type. In this research, black liquor was isolated to get lignin isolate by re-precipitation method. The lignin isolate was then added with resorcinol and formaldehyde at molar ratio of Lignin (L): Resorcinol (R): Formaldehyde (F) = 1:0.5:2. Physical. mechanical, and chemical properties of the glue were tested and evaluated using procedures described in Indonesian standard (SN/)and Japanese standard (JAS).Results indicated that the isolate lignin obtained from black liquor contained typical functional groups, namely hydroxyphenolic and  metoxyl. Under FTIR spectrophotometer. the co-polymer lignin resorcinol formaldehyde showed similar infrared wave number  to those of  phenol  resorcinol formaldehyde  resin. The adhesive  yielded from co-polymerization lignin had  a  red-brown colored dilution, typical phenol smell, with 48.95% of  solid content, 3. 71% of free formaldehyde,  and  227.5 minute of gelatinous time. The Lignin resorcinol formaldehyde glue is applicable for laminated  wood  products.
KETAHANAN 62 JENIS KAYU INDONESIA TERHADAP PENGGEREK KAYU DI LAUT Muslich, Mohammad; Sumarni, Ginuk
Jurnal Penelitian Hasil Hutan Vol 22, No 3 (2004): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2004.22.3.183-191

Abstract

Sixty  two  Indonesian  wood species  were exposed  to  marine  borers for  determining  their resistances. The study was conducted at Rambut Island seashore using wood samples measuring 2,5 cm by 5 cm by 30 cm.  The samples were randomly arranged using nylon rope immersed in the shore and then observed after six  months.   Results revealed that most of the samples  were completely attacked by Martesia striata Linne of the Pholadidae family, Teredo bartchi Clapp.,  Dicyathifer manni Wright and Bankia cieba Clench.,  of the Teredinidaefamily.  Nine out of 62 wood species i.e.   14.5% were resistant to marine borers. Eusideroxylon zwageri T.  et B.,  was classified as very resistant (no attack), while Diospyros celebica Bakh.,  Mimusops elingi  L.,  Parinari corymbosa Miq.,  Tectona grandis lf,  Trestania maengayi Duthii.,Trestania  whiteana Griff,  Vitex cofassus Reinw.,  and Vitex pubescens Vahl. were categorized as resistant (light attack). These nine wood species are suitable for marine constructions.
PENGARUH UMUR DAN POSISI LETAK RUAS PADA BATANG TERHADAP SIFAT PENGERINGAN TIGA JENIS BAMBU Basri, Efrida; Saefudin, Saefudin
Jurnal Penelitian Hasil Hutan Vol 22, No 3 (2004): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2004.22.3.123-134

Abstract

Bamboo is an important multipurpose plant in Indonesia. It is widely used in industry, construction. furniture, and other purposes. As a raw material like solid wood, bamboo needs to be dried. Proper drying can minimize its dimensional changes during usage. improve strength, and eliminate other processing defects. This study was intended to examine influence of age and culm position on drying properties of three bamboo species, i.e. mayan (Gigantochloa robusta Kurz), tali (Gigantochloa apus Kurz). and hitam (Gigantochloa atroviolacea). The most optimum drying temperature for the three species was also determined in this study. Determination of drying schedule was initially explored using medium temperature (80°C) and observing visual defects that may generate during drying, i.e. splits/cracks, and concave or collapse.Results showed that drying properties of each bamboo species were affected by the age and the culm position. The older tree age and the closer the culm location to the top porsion then the lower the shrinkage. Immature culm had a higher drying rate than the mature one, but it had a lower quality. The most suitable drying temperature for those bamboos was ranging about 30 -50°C. The proper drying temperature, however, still needs, further trials prior to any usage for commercial operation. 
HUBUNGAN SIFAT DASAR DAN SIFAT PENGERINGAN LIMA JENIS KAYU ANDALAN JAWA BARAT Basri, Efrida; Hadjib, Nurwati
Jurnal Penelitian Hasil Hutan Vol 22, No 3 (2004): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2004.22.3.155-166

Abstract

This study was intended to investigate the relation between basic properties and drying properties of five priority wood species, i.e. pulai kongo (Alstonia congensis Engl.), kibawang (Azadirachta excelsa Jack.), salamander (Grevillea robusta A.Gunn), mahoni (Swietenia macrophy/la King), and suren (foona sureni Merr.)from West Java. The air drying methods used were 29 - 35°C temperatures and high temperature drying (JOrJ'C). The basic properties included basic density, shrinkage, modulus of rupture (MOR), compression parallel to grain (Cl/), wood strength and anatomical structures. The drying properties included drying duration and wood quality. The maximum-minimum temperature and humidityfor each species were based on defects resulted in high temperature drying.The results showed that the drying properties were significantly affected by basic density and wood anatomical structure. Following the drying qualities and basic properties, the optimal drying schedules for pulai kongo and mahoni wood at 70 - 95°C temperature and 29 - 75% humidity; kibawang wood at 65 - 88°C temperature and 29 - 78% humidity; suren wood at 65 - 9rJ'C temperature and 29 - 78% humidity; and salamander wood at 58 - 83°C temperature and 27 - 82% humidity. These drying schedules, however, still need further trial prior to their implementation in the factory-scale operation. Based on basic density, strength class, and decorative value, kibawang, salamander, mahoni and suren wood were suitable forfancy furniture.
PENINGKATAN PRODUKTIVITAS DAN EFISIENSI PENEBANGAN KAYU MANGIUM DI SATU PERUSAHAAN HUTAN TANAMAN DI PROPINSI JAMBI Suhartana, Sona; Sinaga, Marolop; Sumantri, Ishak
Jurnal Penelitian Hasil Hutan Vol 22, No 3 (2004): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2004.22.3.175-182

Abstract

Implementation  of  felling  technique in the timber  estate is not  yet practiced  efficiently and appropriately.  Study  on  the lowest possible felling  technique  (LPFT) is considered  important to increase fellingproductivity and felling  efficiency. This study was carried out at a timber estate  in iambi  in 2003. The aim of this study was to determine the effectof LPFT on fellingproductivity and efficiency.Data collected in this regard were: working time,  wood volume, productivity,  efficiency, stump height and felling  cost.  Two-categories data were analyzed with respect to their possible differences using a t-test.Results revealed that implementation of LPFT brought out more convenient impacts in comparison  to  the  conventional felling   technique  (CFT),   as follows:   (1)   Felling  productivity increased  at  3.177  m3/hr;  (2) felling efficiency  increased  approximately  7.4%;  (3) felling cost decreased by some Rp 159.1;   and (4) the average stump height were 21.14  cm for LPFT  and 32.83 cmforCFT

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