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KARAKTERISTIK PAPAN PARTIKEL DARI BULU DOMBA, SERBUK GERGAJI DAN SERUTAN KAYU DENGAN PEREKAT UREA FORMALDEHIDA M. I. Iskandar; Achmad Supriadi
JURNAL SAINS NATURAL Vol. 5 No. 1 (2015): Sains Natural
Publisher : Universitas Nusa Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (375.823 KB) | DOI: 10.31938/jsn.v5i1.94

Abstract

Particle Board Characteristics of Fur Sheep, Sawdust and Wood Shavings with Urea Formaldehyde Adhesive         Particle board is a board made of particles of wood or other berlignoselulosa bonded with adhesive, then felted heat. Particle board excess, which uses industrial waste materials, uniform size and density, uniform thick and density, the character and quality can be set. This study aims to investigate the characteristics of particle board from sheep's wool, sawdust and wood shavings. The experimental design used was completely randomized design (CRD) with two factors and repeated three times. The first factor combination of pollen fleece (B), with sawdust sengon (G) and wood shavings sengon (S), namely B0G60S40 : (0% : 60% : 40%), B10G50S40 : (10% : 50% : 40%), B20G40S40 : (20% : 40% : 40%), B30G30S40 : (30% : 30% : 40% and the second factor consists of the physical properties (density, moisture content, thickness swelling and water absorption) and character of mechanical factor (flexural strength, modulus of elasticity, perpendicular and surface strength and straight screw holding). The results of the research were to produce a density value was between 0.69 to 0.78 g/cm3, water content with an average of 6.49%, a value between 32.36 to 83.9% thickness swelling, water absorption between 89,04- 169.15%, the flexural strength values between 68.4 to 121.8 kgf/cm2, elastic modulus was between 671.84 to 1381.51 kgf/cm2, the value of tensile strength perpendicular of the surface was between 0.44 to 1.3 kgf/cm2and screw holding strength value was between 6.0 to 22.3 kg. the higher use of powder fleece might degrade the quality of particle board, otherwise use the higher adhesive could improve the quality of particle board. The study of particle board and fleece, saws and wood shavings was on average below of the national Indonesia standard, except for the density and moisture content, for flexural strength was only partially standard value.Key words: fleece, characteristics, particle board, sawdust, wood shavings. ABSTRAK          Papan partikel merupakan suatu papan yang terbuat dari partikel-partikel kayu atau bahan berlignoselulosa lainnya yang diikat dengan perekat, kemudian dikempa panas. Kelebihan papan partikel, yaitu menggunakan bahan limbah industri, ukuran dan kerapatan seragam, tebal dan kerapatan seragam, sifat dan kualitasnya dapat diatur. Penelitian ini bertujuan untuk mengetahui karakteristik papan partikel dari bulu domba, serbuk gergaji dan serutan kayu. Rancangan percobaan yang digunakan adalah Rancangan Acak Lengkap (RAL) pola faktorial dengan dua faktor dan ulangan sebanyak tiga kali. Faktor pertama kombinasi serbuk bulu domba (B), dengan serbuk gergaji kayu sengon (G) dan serutan kayu sengon (S), yaitu B0G60S40 : (0% : 60% : 40%), B10G50S40 : (10% : 50% : 40%), B20G40S40 : (20% : 40% : 40%), B30G30S40 : (30% : 30% : 40%) dan faktor kedua terdiri dari sifat fisis (kerapatan, kadar air, pengembangan tebal dan daya serap air) dan sifat mekanis (kuat lentur, modulus elastisitas, kuat tarik tegal lurus permukaan dan kuat pegang sekrup). Hasil penelitian menghasilkan nilai kerapatan antara 0,69-0,78 g/cm3, nilai kadar air dengan rata-rata 6,49%, nilai pengembangan tebal antara 32,36-83,9%, daya serap air antara 89,04-169,15%, nilai kuat lentur antara 68,4-121,8 kgf/cm2, nilai modulus elastisitas antara 671,84-1381,51 kgf/cm2, nilai kuat tarik tegak lurus permukaan antara 0,44-1,3 kgf/cm2 dan nilai kuat pegang sekrup antara 6,0-22,3 kg. penggunakan serbuk bulu domba yang semakin tinggi dapat menurunkan kualitas papan partikel, sebaliknya penggunaan perekat yang semakin tinggi dapat meningkatkan kualitas papan partikel. Penelitian papan partikel dan bulu domba, gergaji dan serutan kayu rata-rata di bawah standar nasional Indonesia, kecuali untuk kerapatan dan kadar air, untuk kuat lentur hanya sebagian yang masuk standar.Kata kunci : bulu domba, karakteristik, papan partikel, serbuk gergaji, serutan kayu.
PENGARUH BAHAN DAN KADAR PENGISI DALAM PEREKAT EKSTERIOR TERHADAP KETEGUHAN REKAT KAYU LAPIS M. I. Iskandar
JURNAL SAINS NATURAL Vol. 5 No. 1 (2015): Sains Natural
Publisher : Universitas Nusa Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (473.251 KB) | DOI: 10.31938/jsn.v5i1.100

Abstract

Effect of Materials and Filler Content in Exterior Adhesion for the Bonding Strength of Plywood          Constraints that faced by the plywood industry today is the high cost of manufacture of plywood which are mainly due to the high cost of the adhesive, to lower the cost of the adhesive can be done by adding fillers (filler) into the glue mixture. The material is expected to assist in the process of adhesion, especially to reduce the excessive penetration of the adhesive into venir. The purpose of this study was to determine the effect of the material and content of filler in the bonding strength of the adhesive of plywood. Venir used in this study was peeled veneer measuring 40 cm x 40 cm with a thickness of 1.5 mm. Plywood was made of three layers with a thickness of 4.5 mm. Type of adhesive used was liquid Phenol Formaldehyde (FF) with labor heavy of 170 g/m2 for each surface (one line labor), venir formed felted cool for 10 minutes with a pressure of 10 kg/cm2 followed by heat press at temperatures 140⁰ C , in the pressure of 10 kg/cm2 for 5 minutes. Testing the bonding strength of plywood with the Indonesian National Standard. This research was conducted using the nested experimental design 3 x 5 with four replications. Factor A (filler) the level of three kinds, namely three kinds of flour. Factor B (filler content) were level five kinds, namely 0%, 10%, 20%, 30% and 40%. The results showed that the factor A (filler) was not significantly different, while factor B (grade fillers) was very significant effect on the bonding strength of plywood.Key words: material, content, fillers, exterior, bonding strength ABSTRAK          Kendala yang dihadapi oleh industri kayu lapis dewasa ini adalah tingginya biaya pembuatan kayu lapis yang pada umumnya disebabkan oleh tingginya biaya perekat, untuk menurunkan biaya perekat tersebut dapat dilakukan dengan cara menambahkan bahan pengisi (filler) ke dalam campuran perekat. Bahan tersebut diharapkan dapat membantu dalam proses perekatan, terutama untuk mengurangi penetrasi yang berlebihan dari perekat ke dalam venir. Tujuan penelitian ini adalah untuk mengetahui pengaruh bahan dan kadar pengisi dalam perekat eksterior terhadap keteguhan rekat kayu lapis. Venir yang digunakan dalam penelitian ini adalah venir kupas berukuran 40 cm x 40 cm dengan ketebalan 1,5 mm. Kayu lapis yang dibuat yaitu tiga lapis dengan ketebalan 4,5 mm. Jenis perekat yang digunakan adalah Fenol Formaldehida (FF) cair dengan berat labor 170 g/m2 untuk setiap permukaan (satu garis labor), venir yang dibentuk dikempa dingin selama 10 menit dengan tekanan 10 kg/cm2 kemudian dilanjutkan dengan kempa panas pada suhu 140⁰ C, tekanan kempa sebesar 10 kg/cm2 selama 5 menit. Pengujian keteguhan rekat kayu lapis dengan Standar Nasional Indonesia. Penelitian ini dilakukan dengan menggunakan rancangan percobaan tersarang (nested) 3 x 5 dengan empat kali ulangan. Faktor A (pengisi) yang bertaraf tiga macam yaitu tiga macam tepung. Faktor B (kadar pengisi) yang bertaraf lima macam, yaitu 0%, 10%, 20%, 30% dan 40%. Hasil penelitian menunjukkan bahwa faktor A (bahan pengisi) tidak berbeda nyata, sedangkan faktor B (kadar bahan pengisi) berpengaruh sangat nyata terhadap keteguhan rekat kayu lapis.Kata kunci:  bahan, kadar, pengisi, eksterior, keteguhan rekat
PENGARUH TEMPERATUR PEREBUSAN JERAMI TERHADAP SIFAT FISIS MEKANIS PAPAN PARTIKEL M. I. Iskandar
JURNAL SAINS NATURAL Vol. 4 No. 2 (2014): Sains Natural
Publisher : Universitas Nusa Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (562.816 KB) | DOI: 10.31938/jsn.v4i2.88

Abstract

Effect of Temperature of Straw Boiling on Mechanical and Physical Properties of Particle Board          Levels of extractive substances in the straw as much as 10-15% and 12-18% silica content respectively. Two of these substances can inhibit good adhesion bonding between the particles during the sealing process. Treatment of straw boiling  before gluing process can reduce the negative effects of extractive substances to the bonding adhesive. The purpose of this study was to determine the effect of temperature of the boiling straw on mechanical and physical properties of particle board. The tested physical properties included density, moisture content, thickness swelling and water absorption while the mechanical properties tested included flexural modulus, fracture modulus, internal bonding strength and screw holding strength. Analysisof statistic of the data used was Complete Random Design (RAL). The treatment consisted of a five-level with three replications so that the total number of trials was fifteen. To determine the effect of treatment carried out the Analysis of Variance. To determine the effect of treatment was significantly different would do a further test the Duncan's multiple range test. Processing data using SAS software, version 6123. The results showed an increase in the temperature of straw boiling was very significant and fluctuative on the properties of particle board and the moisture content, thickness swelling 24 hours, flexural modulus (MOE), fracture modulus (MOR), but did not significant affect the density and internal bonding strength. Boiling temperature 40⁰C on straw produce panels with the best qualities. The properties of particle board research results that met the requirements of Standard JIS A 5908: 215 only the density and moisture content.Keywords: temperature, boiling, straw, mechanical physical properties ABSTRAK         Kadar zat ekstraktif dalam jerami sebanyak 10-15% dan kadar silika 12-18%. Dua zat tersebut dapat menghambat ikatan rekat yang baik antar partikel pada waktu proses perekatan. Perlakuan perebusan jerami sebelum proses perekatan dapat mengurangi pengaruh negatif zat ekstraktif terhadap ikatan rekat. Tujuan penelitian ini adalah untuk mengetahui pengaruh temperatur perebusan jerami terhadap sifat fisis mekanis papan partikel. Sifat fisis yang diuji meliputi kerapatan, kadar air, pengembangan tebal dan daya serap air sedangkan sifat mekanis yang diuji meliputi modulus lentur, modulus patah, keteguhan rekat internal dan kuat pegang sekrup. Analisis statistik data yang digunakan adalah Rancangan Acak Lengkap (RAL). Perlakuan terdiri dari lima taraf dengan ulangan sebanyak tiga sehingga jumlah total percobaan adalah lima belas. Untuk mengetahui pengaruh dari perlakuan dilakukan analisis ragam (Analysis of Variance). Untuk mengetahui pengaruh berbeda nyata perlakuan dilakukan uji lanjut dengan uji wilayah berganda Duncan. Pengolahan data menggunakan software SAS versi 6.123. Hasil penelitian menunjukkan peningkatan temperatur perebusan jerami berpengaruh sangat nyata dan fluktuatif terhadap sifat-sifat papan partikel dan kadar air, pengembangan tebal 24 jam, modulus lentur (MOE), modulus patah (MOR), tetapi tidak berpengaruh nyata terhadap kerapatan dan keteguhan rekat internal. Perebusan jerami pada suhu 40⁰C menghasilkan panil dengan sifat-sifat terbaik. Sifat-sifat papan partikel hasil penelitian yang memenuhi persyaratan Standar JIS A 5908:215 hanya kerapatan dan kadar air.Kata kunci: temperatur, perebusan, jerami, sifat fisis dan mekanis