Lestari, Setyani B
Pusat Penelitian dan Pengembangan Hasil Hutan

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SIFAT PAPAN SERAT SEMBILAN JENIS KAYU DARI IRIAN JAYA Lestari, Setyani B; Nawawi, Nawawi; Suryadi, Suryadi
Jurnal Penelitian Hasil Hutan Vol 23, No 5 (2005): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3764.257 KB) | DOI: 10.20886/jphh.2005.23.5.399-405

Abstract

Penelitian ini bertujuan untuk mengetahui sifat pengolahan dan sifat fisik papan serat sembilan jenis kayu yang berasal dari Irian Jaya. Penelitian pembuatan papan serat ini dilakukan untuk mengetahui kualitas kayu tersebut dihubungkan dengan kegunaannya dalam pengembangan industri pengolahan kayu terutama industri papan serat. Dengan demikian penggunaannya akan lebih optimal karena papan serat dapat digunakan sebagai bahan mebel, konstruksi, peti kemas dan bahan bangunan lainnya. Pembuatan pulp menggunakan proses semikimia terbuka dengan kondisi pengolahan, konsentrasi NaOH 35 g/l, perbandingan serpih dan larutan pemasak 1 : 8 dan suhu pemasakan 100ºC selama 2 jam. Setelah pemasakan, pulp dicampur dengan bahan penolong urea formaldehida 10% dan tawas 5% w/w. Metode yang dipakai dalam pembentukan lembaran papan serat adalah pembentukan lembaran basah menggunakan "deckle box”. Selanjutnya dikempa dingin dengan tekanan 10 kg/cm2 selama 5 menit dan dilanjutkan dengan kempa panas bertekanan 25 kg/cm2 pada suhu 170ºC selama 10 menit.Pengamatan terhadap hasil pengolahan dan sifat fisis mekanis lembaran papan semi dibandingkan dengan standar FAO (1958). Hasil penelitian menunjukkan bahwa rendemen memenuhi standar dan konsumsi alkali termasuk kelas rendah sarnpai sedang. Sifat fisismekanis papan serat sembilan jenis kayu yang memenuhi standar FAO ialah kerapatan dan keteguhan patah 8 jenis kayu, kecuali Trichandenia Philippinensis Merr. Keteguhan lentur Timelodendrom amboinicum Hassk, Gmelina moluccana (BL) Beaker, Celitis rigescens (Miq) Planch dan keteguhan tarik sejajar permukaan Timelodendrom amboinicum Hassk. Sedangkan daya serap air dan pengembangan tebal tidak memenuhi standar FAO.
SIFAT PULP SULFAT KAYU KURANG DIKENAL ASAL JAWA BARAT Siagian, Rena M; Lestari, Setyani B; Yoswita, Yoswita
Jurnal Penelitian Hasil Hutan Vol 22, No 2 (2004): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6419.293 KB) | DOI: 10.20886/jphh.2004.22.2.75-86

Abstract

This paper deals with the results of a laboratory-scale manufacture of sulphate pulp from lesser known wood species from West Java in the possible utilization as a raw material for pulp with the emphasizes on yield, pulp processing properties and physical properties. There arefive wood species experimented, i.e. marasi (Hymenaea courbaril L.), asam jawa (Tamarindus indica L.), balobo (Diplodiscus (?), kundang (Ficus variegata Bl.) and kendal (Ehretia acuminata R.Br.).The results revealed that marasi, asam jawa, kundang, and kendal wood species could produce pulp with the yield commonly in the range as obtained from sulphate process, i.e. 40 - 55 percent. The lowest pulp yield (less than 40 percent), however, was obtained by balobo species. The favorable delignification with the low Kappa number in the resulting sulphate pulp only occurred to asam jawa wood species. Meanwhile, the other four wood species in the sulphate process proceeded with less favorable delignification and concurrently produced pulp with high Kappa number.When viewed from the pulp yield, Kappa number, and active alkali consumption, only asam jawa wood species seemed suitable for producing bleached pulp. Conversely, the other four species appeared to be unsuitable for bleached pulp. To acquire their suitability, hence, those four species should be cooked in the sulphate process under a more enhanced condition.The properties of the unbleached pulp from those five wood species were in the ranges of 42 -61 Nm/g for tensile index, 6.52 - 12.38 Nm2/kg for tear index, 2.47 - 3.20 KPa.m2/g for burst index, and 3.64 - 8.16 df for folding endurance.Viewed from physical properties that covered tensile, burst, and tear index, it turned out that balobo-wood (Diplodiscus (?)) pulp afforded the highest physical properties followed by those of kundang (Ficus variegata Bl.) and marasi (Hymenaea courbaril L.) wood species. Meanwhile, the lowest physical properties of the pulp sheet were obtained from asam jawa (Tamarindus indica L.) and kendal (Ehretia acuminata R.Br.) woods.
ANALISIS KIMIA BEBERAPA JENIS KAYU DARI SULAWESI UTARA Pari, Gustan; Lestari, Setyani B
Jurnal Penelitian Hasil Hutan Vol 11, No 1 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1836.916 KB) | DOI: 10.20886/jphh.1993.11.1.7-11

Abstract

This paper reported the result of chemical analysis of ten wood species from north Sulawesi.The result shows that holocelluloce content ranges from 55,64 to 65,42 percent, cellulose from 41,89 to 52,44 percent. Cellulose content of serianthes minahassae, pangium edule, lophopetalum javanicum, aglaia versteeghii and bischoffia javanica are higher than other species. Lignin content varies from 22,59 to 31,36 percent , pentosan from 16,92 to 19,61 percent. Lignin and pentosan content of all wood species examined are moderate and low. Ash content varies from 0,05 to 1,83 percent, silica from 0,04 to 0,4 percent. The solubility in cold water ranges 1,80 to 4,79 percent, in hot water from 2,91 to 5,16 percent, in sodium hydroxide from 11,06 to 19,21 percent and in alcohol benzene (1 : 2) from 6,08 to 9,08 percent, The axtractive contents, especially those soluble in alcohol benzene, of all wood species are in high extractives component class.Based on the cellulose and pentosan content all 10 wood species from north Sulawesi are suitable as raw material for pulp and paper industry.