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Jurnal Penelitian Hasil Hutan
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Articles 5 Documents
Search results for , issue " Vol 11, No 8 (1993): Jurnal Penelitian Hasil Hutan" : 5 Documents clear
ANALISIS KIMIA KAYU NANGKA (Artocarpus heterophyllus lamk) DARI JAWA BARAT (chemical analysis of jackfruit wood from west java) Komarayati, Sri; Hastoeti, Poedji
Jurnal Penelitian Hasil Hutan Vol 11, No 8 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1305.889 KB) | DOI: 10.20886/jphh.1993.11.8.326-328

Abstract

Jackfruit plant (artocarpus heterophyllus lamk) is know as multipurpose tree. A chemical analysis of jackfruit wood from west java has been conducted to determine the contents of cellulose, lignin, pentosan,ash,silica and solubility in cold water, hot water, one percent sodium hydroxide and alcohol-benzene (1:2).The results showed that cellulose content 56,47 percent, lignin 28,76 percent, pentosan 18,64 percent, ash 0,78 percent, and silica 0,37 percent. Thesolubility in cold water 12.29 percent, hot water 14,41 percent, one percent sodium hydroxide 24,70 percent, and solubility in alcohol-benzene (1:2) 10,78 percent.
PEMBUATAN PAPAN SERAT BERKEPARATAN SEDANG DARI KAYU DAUN LEBAR DENGAN PROSES PAPAN MEKANIS (thermomechanical of medium density fibreboard (MDI) from hardware) purba, Kayano
Jurnal Penelitian Hasil Hutan Vol 11, No 8 (1993): 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.1993.11.8.333-337

Abstract

This paper deals with an experiment investigating the effect of presteaning time on the properties of medium density fibreboard. The boards were made of 15 wood species mixtures with an equal weight proportion of four specific gravity groups i,e 0.31 – 0.45; 0,46 – 0,60; 0,61 – 0,75; and 0.76 – 0.90.Pulp preparations were carried out by using thermo mechanically at 4 kg/cm2 for 10, 15 and 20 minutes and refined for 10 minutes. The sheets were formed by using the laboratory wet felting process. Cold pressing ( room temperature) and hot pressing (170°C) were conducted at 45 kg/cm2 for 5 minutes and 20 kg/cm2 for 40minutes, respectively.The experiment’s result also showed that the tensile strength parallel to surface, modulus of rupture, modulus of elasticity. Density, water absorption, thickness swelling and volume swelling of fiberboard were not significantly affected by the presteaming time, specific gravity and interaction of the both factors. It was also reviewed that an increasing specific gravity tended to lower the intodulus of rupture, tensile strength parallel to surface and modulus of elasticity, and tended to increase thickness swelling, volume swelling and water absorption.In general , the properties of the medium density fibreboard (density, water absorption, modulus of rupture and modulus of elasticity) are comparable to those of the FAO standard requirements, but the tensile strength parallel to surface is tess than that of the FAO standard.
PENGAWETAN KAYU KERUING UNTUK MENARA PENDINGIN (Preservation of keruing woodfor cooling tower) Barly, Barly; Martawijaya, Abdurahim; Permadi, Pipin
Jurnal Penelitian Hasil Hutan Vol 11, No 8 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (8597.099 KB) | DOI: 10.20886/jphh.1993.11.8.303-307

Abstract

The utiliization of wood for cooling tower in Indonesia tends to increase and has become more important. Wood as material for cooling tower has been applied commercially in several developed countries such as New Zealand,USA and Japan. While in indonesia it has just been started in 1981 after the establishment of Kamojang Geothermal Power Station Unit 1. This paper deals with some experience in treating keruing wood (Dipterocarpus spp.) as material for cooling tower by vacuum-pressure impregnation. The result shows that keruing is easy to treat. In other to meet the retention of 24 kg/m3, the concentration of the solution must be at least 6.25 percent and absortion of 384 liters of preservative per cu.m.
PENGAWETAN DUA JENIS KAYU BENTUKAN DENGAN BAHAN PENGAWET BFCA SECARA RENDAMAN DINGIN (Cold Soaking Treatment of Two Wood Species of Moulding Products Using BFCA Preservative) Abdurrohim, Sasa; Ginoga, Bakir
Jurnal Penelitian Hasil Hutan Vol 11, No 8 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (26020.111 KB) | DOI: 10.20886/jphh.1993.11.8.338-341

Abstract

Moulding products made of two wood species in the form of coves were treated with BFCA preservative by cold soaking. The length of the test pieces were 30 cm. The duration of cold soaking treatment were 2, 4, 6 and 8 days, with preservative concentrations of 5 and 10 percent. The test results, after taking both retention and penetration requirements into consideration for wood uses under roof and in the open air without ground contact, showed that both wood species could be satisfactorily treated under experimental conditions. The treatment schedules proposed for both species are also presented in this paper. The average swelling of those species after treatment comparing to dimension are relatively small, therefore could be avaidable and has no affect on their use.
MINIMASI BIAYA BAHAN BAKU KAYU BULAT PADA INDUSTRI PENGGERGAJIAN KAYU JATI DI IPK BRUMBUNG (minimization of round wood raw material cost at teak sawmill at brumbung sawmill) Prahasto, Hendro
Jurnal Penelitian Hasil Hutan Vol 11, No 8 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5562.476 KB) | DOI: 10.20886/jphh.1993.11.8.320-325

Abstract

The objective of this study is to find optimal allocation of round wood raw material used by teak sawmill, so as to minimize cost of raw materialThe result of linear programming analysis shows that, in 1991 the optimal cost of raw material at Brumbung teak sawmill was Rp 9,992,759,165. Using this optimal raw material allocation scheme, Brumbung teak sawmill could decrease raw material cost about Rp 390,573,835 in 1991.

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