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PENGARUH CAMPURAN JENIS KAYU TERHADAP SIFAT VENIR LAMINA (Effect of wood species cominations on laminated veneer properties) I M Sulastiningsih; Rodjak Memed; Paribotro Sutigno
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.1993.11.8.308-312

experimental laminated veneer ( 5 - ply ) were made from 12 wood species veneers glued with urea formaldehyde. Thickness of veneer was 1.5 mm and the range of veneer density was 0.38 - 0.83 g/cm3. Veneers were divided into 3 groups based on their densily i.e. low, medium and high. The laminated veneer properties were tested in accordance with the plywood standards ( JAS and ASTM) the properties tested were density,moisture content, bending strength, tensile strength, compression strength , and moisture resistant. Bonding strengththe results showed that all kinds of wood species combination could be made for laminated veneer glued with urea formaldehyde without any difficullty. The density of laminated veneer was higher than an average veneer density of single. wood species or an average veneer density of mixed wood species. The mechanical properties of laminated veneer increased as the densily of laminated veneer increased and the relationship could be expressed by linear regression equations. As a result, some laminated veneer properties could be estimated from its density without considering its wood species.

PENGARUH BAHAN PENGAWETAN PHOXIM TERHADAP SIFAT PAPAN PARTIKEL KAYU KARET (hevea brasiliensis) (effect of phoxim preservation on the properties of rubber wood particleboard (hevea brasiliensis)) Rodjak Memed; I M Sulastiningsih; Paribotro Sutigno
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.1993.11.8.329-332

The objectives of the study was to determine the effect of phoxim on the properties of rubber wood particleboard (Hevea brasiliensis ) phoxim concentration used were 0.05,1, 1.5 and 2 % based on particle dry weight.The result showed, that the addition of phoxim preservative to particleboard reduced the values of modulus of rupture, modulus of elasticity, internal bond strength and shear strength, but increased the thicknees swelling and water absorption of particleboard. However, the phyrical. and mechanical properties of particleboard treated With phoxim preservative up to 2 % met the FAO standard for medium density particleboard and met JIS for type 150 particleboard. Compared with Indonesian standard all particleboards produced met the standard requirements except for internal bond strength.

PENGABUH BERAT LABUR DAN KADAR PENGISI PEREKAT TANIN FORMALDEHIDA TERHADAP KETEGUHAN BEKAT LAPIS adi santoso; rodjak memed; Paribotro sutigno
Jurnal Penelitian Hasil Hutan Vol 9, No 3 (1991): 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.1991.9.3.111-114

It has been known that tannin formaldehyde resin is suitable for exterior plywood adhesive. one of the source of tannin is Acacia decurrens bark. A study on using tannin formaldehyde from. Acacia decurrens bark has been done to predict the effect of glue spread and percentage of filler on the plywood bonding strength. The results show that glue spread has not sigatficant effect on plywood bonding strength, while percentage of filler has significant effect on plywood bonding strength and all plywood resulted meet German Standard requirement for exterior purpose. (AW 100).From the economic paint of view, it is recommended. to use glue spread of 150 g/m2 and percentage of filler of 4o%.

PENGARUH MELAMIN DALAM PEREKAT UREA FORMALOEH IDA TERHADAP BEBERAPA SIFAT KAYU LAPIS MERANTI The (lffect of melamine composition in urea formaldehyde resin glue on the properties of merenti plywood Rodjak Memed
Jurnal Penelitian Hasil Hutan Vol 8, No 1 (1990): 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.1990.8.1.20-24

The "fiy1iialal'ld :chemical properties of urea formaldehyde resin were tested based on the Indonesian Standard. which cO'nlittfl)t appearatlceipropertie1, pH, tree fOrmaldehyde, solid content and pot'~llfe. TM re.ult 1hou>s that most of the prripertiu co11form,fbith. the nanclard : . . 'n.w:addinon. 1 scent '.melamine qnd ao ~rcent extender 1'r:Oduces plywood with formAlile1&yde emwionmeetini the J 981. American 1tanclqrd. The effect of melamine addition toat not signi(tt:ant.The effect of extender on theother htind 1uu•iiwhJ1. 1igni'(ieant'effect on the ilecr:ea_1e of formaldehyde emiaion tn plywood. Allplytt;ooli bonittir; 1tren,.th meet the Indonesian, Japaneseand German standard. The effect of melamine addition of lO dd 16 enton thplywood bonding atrength' was not significant.

PENGARUH SENYAWA BORON TERHADAP BEBERAPA SIFAT PAPAN PARTIKEL KARET (Hevea brasiliensis) Rodjak Memed; I M Sulastiningsih; Paribotro Sutigno
Jurnal Penelitian Hasil Hutan Vol 10, No 5 (1992): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

The objective of the study was to determine the effect of boron concentration and resin proportion on some properties of rubberwood (Hevea brasiliensis) particleboard. Boron concentrations used were 0, 0.25, 0.50, 0. 75 and 1.0%, and resin proportions in urea formaldehyde were 10, 12 and 14% dry weight basis.The results indicated that the addition of boron compound to porticleboard reduced the values of bending strength, internal bond strength and shear strength but increased the thickness swelling and water absorption of particleboard. Mechanical properties of particleboard increased with the increase of resin proportion. Thickness swelling and water absorption decreased as the resin proportion increases. Physical and mechanical properties of particleboard treated with boron compound up to 1% cocentration level and bonded with urea formaldehyde at 12% or 14% resin propotions were all met the SII standard requirements, except for internal bond strength. Compared with FAO standard, particleboards that met all the standard requirements were those with 14% resin proportion.

SIFAT PAPAN WOL KAYU DARI 6 JENIS KAYU HUTAN TANAMAN INDUSTRI I M Sulastiningsih; Rodjak Memed; Paribotro Sutigno
Jurnal Penelitian Hasil Hutan Vol 7, No 2 (1990): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

The results of laboratory test of wood wool board properties made from 6 individual wood species obtained from East Kalimantan, Jambi, South Sumatera and Maluku province are reported in this paper. The properties tested were board density, moisture content, thickness reduction due to compression and bending strength.The study reveals that average yield of wood wool is 348 kg per cubic meter of log input. The wood wool of Acacia mangium must be soaked in cold water for 24 hours prior to manufacturing of wood wool board, whereas the other species can be processed directly.The physical and mechanical properties of wood wool boards made from three wood species (Shorea platyclados, Acacia mangium and Shorea leprosulaf) catalyzed with CaCl2 solution were in conformity with the DIN 1101 standard Nevertheless, only two species (S. platyclados and A. mangium) catalyzed with Ca(OH)2 suspension met the standard requirement.

SIFAT VENIR DAN KAYU LAPIS ENAM JENIS KAYU UNTUK HUTAN TANAMAN INDUSTRI Rodjak Memed; M I Iskandar; Paribotro Sutigno
Jurnal Penelitian Hasil Hutan Vol 7, No 4 (1990): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

The characteristics studied are peeling properties, physical properties of the veneer, gluing properties and some physical and mechanical properties of the plywood (both triplex and multiplex).All logs from 6 wood species could be peeled satisfactorily in cold condition. Veneer of 1.5 mm thickness could be produced at cutting angle between 90° 30’- 92°.Average shrinkage of the veneer is 6.52% and average veneer swelling from oven dry to air dry condition is 4.11%. Water resistant bonding strength for all wood species studied meet Indonesian, Japanese and German standard. Average thichness reduction due to pressing in the plywood manufacturing process is 0.31mm. The mechanical properties of plywood vary among the wood species.

PENGARUH KOMPOSISI PEREKAT FENOL FORMALDEHIDA TERHADAP.KETEGUHAN REKAT KAYU LAPIS SENGON Rodjak Memed; Adi Santoso; Paribotro Sutigno
Jurnal Penelitian Hasil Hutan Vol 8, No 3 (1990): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

In the future. phenol formaldehyde resin will be used in greater quantity due to ita capability inproducing weather and boil•proof plytDood. This paper discribet two aapects, i.e. ': the effect of weight ratio of phenol and formaldehyde on the propemea of phenol formaldehyde resin and plywood bonding strength; and the effect of filler proportion on the bond.inf ltrength of se111on plywood glued with phenol formaldehyde.77ae resulta showed that the properties of phenol formaldehyde resin which were produced in three different com- positions were met Indonesian Standard. The effect of filler proportion on plywood bonding strenfth waa significant, but the effect of weight ratio of phenol formaldehyde and their interaction were not significant. The bond.inf strength of plywood glued .with phenol formaldehyde at 1111 compositio1u were conformed with German standard for exterior ply- wood. The_ rwlati_onship between filler proportion and plywood bonding strength could be exprwued by quadratic regreBBion.

SIFAT PAPAN WOL KAYU DARI 10 JENIS KAYU NUSA TENGGARA BARAT l M Sulastiningsih; Rodjak Memed; Paribotro Sutigno
Jurnal Penelitian Hasil Hutan Vol 9, No 5 (1991): 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.1991.9.5.183-188

The results of laboratory test of wood-wool board properties made fram ten wood species obtained from Nusa Tenggara province are reported in this paper. The properties tested were board density, moisture content, thickness reduction due Io compression and benJing strengih.The Study revealed that the average yield of wood-wool was 423,6 kg per cubic meter of log input. The wood-wool of Anthoceplus cadamba Miq. and Anthocephallus sp. must be soaked in cold water for 24 houn prior to manufacturing of wood-wool board, whereas she other species did not require soaking. The physical and mechanical properties of wood-wool board from nine wood species mineralized with CaCl2 solution were in conformity with the DIN 1101 standard. However, only three wood species mineralized with Ca (OH)2 suspension met the standard requirement.

PENGARUH CAMPURAN JENIS KAYU TERHADAP SIFAT VENIR LAMINA (Effect of wood species cominations on laminated veneer properties) I M Sulastiningsih; Rodjak Memed; Paribotro Sutigno
Jurnal Penelitian Hasil Hutan Vol 11, No 8 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

experimental laminated veneer ( 5 - ply ) were made from 12 wood species veneers glued with urea formaldehyde. Thickness of veneer was 1.5 mm and the range of veneer density was 0.38 - 0.83 g/cm3. Veneers were divided into 3 groups based on their densily i.e. low, medium and high. The laminated veneer properties were tested in accordance with the plywood standards ( JAS and ASTM) the properties tested were density,moisture content, bending strength, tensile strength, compression strength , and moisture resistant. Bonding strengththe results showed that all kinds of wood species combination could be made for laminated veneer glued with urea formaldehyde without any difficullty. The density of laminated veneer was higher than an average veneer density of single. wood species or an average veneer density of mixed wood species. The mechanical properties of laminated veneer increased as the densily of laminated veneer increased and the relationship could be expressed by linear regression equations. As a result, some laminated veneer properties could be estimated from its density without considering its wood species.

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