RANCANG BANGUN ALAT CETAK KOMPOSIT SAMPAH PLASTIK DENGAN SABUT KELAPA

The plastic waste composite molding tool with coconut fiber is designed with the aim of converting HDPE plastic waste, especially drink bottle covers mixed with coconut fiber into a product in the form of a composite board (panel) that is more useful. The dimensions of the mold are 410 x 540 mm, the tool height is 850 mm, the width is 600 mm, the length is 600 mm, the temperature of the installed heating elements is around 200-250 degrees for 12 pieces, 220 V 1000 watts, while the press uses a 10 ton hydraulic jack. While the heating temperature for pressing the composite board is set in the range of 130 – 180 oC. From the results of the first printing press with iron plate material, the resulting product is sticky on the plate surface, the second test is coated with aluminum foil, the resulting product is less than perfect because the surface is uneven. , while the third test was coated with a stainless steel plate, the resulting product was better than the previous results. This research needs to be improved in order to assist the government in handling plastic waste. In addition, the results of products with this tool will help improve people's skills and improve the economy of the products of this tool.

Study on The Characteristics of NaCl Treated Kenaf Fiber Epoxy Composite Board

The treatment of kenaf fiber surfaces with chemicals has proven to be an effective method to improve composite properties. Meanwhile, natrium chloride (NaCl) is one of the chemicals that has great potential to be used for modifying natural fibers. Therefore, this study aims to investigate the characteristics of a composite board made from NaCl-treated kenaf fiber and epoxy. The method used was a completely randomized design with two factors, namely the level of NaCl in the treatment solution including 1, 3, and 5%wt, as well as the epoxy content of 10, 20, and 30%wt based on the dry weight fiber. The NaCl treatment was carried out by soaking the fibers in the solution for 1 hour at room temperature, rinsed using water until the pH of the water reached 7, and then dried in an oven at 80ᵒC for 6 hours. Furthermore, the Kenaf fiber and epoxy were mixed manually, while the boards were manufactured using a heat pressing system at 120ᵒC, with a pressure of 3.5 MPa for 10 minutes, and a thickness of 10 mm. The physical and mechanical properties were then evaluated based on JIS A5908. The results showed that the composite board properties were optimum at NaCl 5%, 20% of epoxy, modulus of elasticity and rupture of 2.02 GPa, and 18.63 MPa respectively, internal bonding 1.94 MPa, thickness swelling 2.89 %, and water absorption of 10.49%. The results showed that the physical and mechanical properties of the composite board increased with a high NaCl concentration.

Feasibility of using low resin content levels in the production of bamboo particle composite: basic properties

In this study, the suitability of Semantan bamboo (Gigantochloa scortechinii) particles in the production of single-layered composite board was investigated. The effects of different resin types and lower resin content levels on the basic properties (mechanical and physical properties) of particle composite board made from G. scortechinii were determined. The 12-mm thickness boards with dimension of 340 × 340 mm and targeted density of 660 kg/m3 were fabricated. Types of resin used were melamine urea formaldehyde (MUF) and urea formaldehyde (UF), while resin content levels were 3.5 and 5%. In general, the mechanical and physical properties of board blended with MUF resin were better than UF due to the presence of melamine in MUF that influenced the properties. Board made from 5% resin content were better in term of mechanical and physical properties than 3.5% resin content levels. 5% resin content level had increased the particles bonding ability, thus influenced the excellent properties of the board. However, in general, the properties of bamboo particle composite board in this study were not comparable to the board made from wood. Only IB properties of bamboo particle composite board exceeded the minimum requirements as stipulated in standards. As a consequence, the information of particle composite board made from bamboo is important in assessing bamboo’s usefulness as an alternative raw material for wood-based industries. The final results obtained could be used as reference for researchers and manufacturers.

SIFAT FISIS DAN MEKANIS PAPAN KOMPOSIT DARI SERAT BATANG KELAPA SAWIT (Elaeis guineensis Jacq) DENGAN BERBAGAI KOMPOSISI PEREKAT PVAC

The purpose of this study was to determine the effect of PVAc adhesive composition on the physical and mechanical properties of the composite boards of palm oil stems and determine the best test example from a technical and economic point of view. This research will be carried out at the Banjarbaru Forestry Faculty Workshop. Research time ± 3. There are 3 levels (levels) of the PVAc adhesive composition tested, namely 40%, 45%, and 50%. The parameters of the composite board properties studied were physical properties, including: Moisture content and density, as well as the mechanical properties that fracture strength (MoR) and modulus of elasticity (MOE). The results showed that the physical and mechanical properties of composite boards were strongly influenced by the adhesive composition, the more the adhesive composition is used, the better the composite board properties, especially in terms of water content and MoR, where the results show that the water content is decreasing and the MoR is increasing. Nevertheless the use of a 40% adhesive composition has been able to produce a composite board that can meet SNI standards No. 03-2105 2006. Properties of palm oil stem waste composite boards made with PVAc adhesive (Crosslink X-PVAc) moisture content ranged from 9.49% - 13.07%, density 0.494 - 0.559 gr / cm³, and MoR 20.613 - 22.483 kg / cm².Tujuan penelitian untuk mengetahui pengaruh komposisi perekat PVAc terhadap sifat fisis dan mekanis papan komposit dari batang kelapa sawit dan menentukan contoh uji yang terbaik dari segi teknis. Penelitian ini dilaksanakan di Workshop Fakultas Kehutanan Banjarbaru. Waktu penelitian ±3. Ada 3 taraf (level) dari perlakuan komposisi perekat PVAc yang diuji cobakan, yaitu 40%, 45%, dan 50%. Adapun parameter sifat papan komposit yang diteliti adalah sifat fisis, meliputi: Kadar air dan kerapatan, serta sifat mekanisya itu keteguhan patah (MoR) dan keteguhan lentur (MOE). Hasil penelitian menunjukkan bahwa sifat fisis dan mekanis papan komposit sangat dipengaruhi oleh komposisi perekat, semakin bertambah komposisi perekat yang digunakan maka sifat papan komposit semakin baik, terutama ditinjau dari kadar air dan MoR, dimana hasil menunjukkan bahwa kadar air semakin berkurang dan MoR makin meningkat. Meskipun demikian penggunaan komposisi perekat 40% sudah dapat menghasilkan papan komposit yang dapat memenihi standar SNI no 03-2105 2006. Sifat papan komposit limbah batang kelapa sawit yang dibuat dengan perekat PVAc (Crosslink X-PVAc) kadar air berkisar 9,49% – 13,07%, Kerapatan 0,494 - 0.559 gr/cm³, dan MoR 20.613 – 22.483 kg/cm².

Processing and Properties of Oil Palm Fronds Composite Boards from Elaeis guineensis

Oil palm fronds are one of the biomass residues originating from oil palm plantations. It has great potential to be used as an alternative material for the composite boards industry to reduce dependency on wood-based raw materials. The fronds are obtainable all the year round and in big quantity. The oil palm fronds had been processed as compressed oil palm fronds to form such a potential composite board in this topic. A composite board from compressed oil palm fronds was produced by removing the fronds’ leaflets and epidermis. The sample was sliced longitudinally into thin layers and compressed into an identical thickness at about 2 to 3 mm. Pieces of the sample were dry using the air-dried method. They were then mixed with phenol and urea-formaldehyde of resins in the range of 12-15% and compressed again with another layer forming a composite board. Standard outlined by the International Organization for Standardization (ISO) tested for their physical and strength properties of composite board. Found that the physical and strength aspects’ properties show that the composite board possessed characteristics at par or equivalent. The composite board from compressed oil palm fronds has good prospects to be used as an alternative to wood. Thus, this characteristics can overcome the shortage in materials supply in the wood-based industry.

Pembuatan dan Pengujian Papan Komposit (Composite Board) Dari Limbah Kantong Plastik (Kantong Kresek)

Abstrak Pada penelitian ini akan diteliti proses pembuatan papan komposit (Composite Board) dengan metode pemasan menggunakan media minyak goreng. Papan komposit yang dibuat ada 4 spesimen yaitu papan komposit tanpa bahan pengisi dan papan komposit dengan bahan pengisi. Bahan pengisi menggunakan serat alam yaitu serat bambu, serat kelapa dan serat ijuk. Berdasarkan hasil pengujian bending didapat hasil kekuatan bending untuk spesimen 1 (tanpa serat) 393,283 N, spesimen 2 (dengan serat bambu) 128,627 N, spesimen 3 (dengan serat kelapa) 260,627 N dan spesimen 4 (dengan serat ijuk) 477,785 N. Berdasarkan hasil pengujian tarik didapat hasil kekuatan tarik untuk spesimen 1 (tanpa serat) 524,475 N, spesimen 2 (dengan serat bambu) 523,687 N, spesimen 3 (dengan serat kelapa) 464,399 N, spesimen 4 (dengan serat ijuk) 387,361 N. Secara garis besar papan komposit dengan bahan pengisi serat ijuk mempunyai kekuatan mekanis yang lebih baik di bandingkan papan komposit spesimen lainnya. Kata kunci: Limbah Plastik, Kantong Plastik, Kantong Kresek, Komposit, Serat Alam,Daur ulang. Abstract This research will examine the process of making a composite board with the heating method using cooking oil as a heating media. There are 4 specimens are made of composite boards and it divided into two category, such as composite boards with fillers and composite boards without fillers. Fillesr which are used in composite boards is a natural fiber, namely bamboo fiber, coconut fiber and palm fiber. Based on the results of the bending test, specimen 1 (without fibers) obtained the bending strength of 393,283 N, specimen 2 (with bamboo fibers) of 128,627 N, specimen 3 (with coconut fiber) of 260,627 N and specimen 4 (withpalm fiber) of 477,785 N. Based on the results of the tensile test, specimen 1 (withoutfibers) obtained tensile strength of 524,475 N, specimen 2 (with bamboo fibers) of 523,687 N, specimen 3 (withcoconut fiber) of 464,399 N, and specimen 4 (with palm fiber) of 387,361 N. Generally, the composites board with palm fiber as a filler materials have better mechanical strength than other specimen composite boards. Keywords: PlasticWaste, Plastic, PlasticBags, Composites, Natural Fibers, Recycle

Low-formaldehyde emission composite particleboard manufactured from waste chestnut bur

Chestnut bur is an agro-waste material generated in the chestnut production. It is a tannin-rich lignocellulosic material which might be a promising raw material for low-formaldehyde composite particleboard production when using urea–formaldehyde (UF) as bonding adhesive. In this study, the characteristics of chestnut bur were analyzed to assess its application value for composite panel. Five-type particleboards were manufactured from the mixture of chestnut bur/poplar particles with the weight ratios of 0/100, 25/75, 50/50, 75/25 and 100/0, UF resin was used as bonding adhesive. The effects of the addition amount of chestnut bur on the physical, mechanical properties and formaldehyde emission of particleboard were studied. The results showed as follows: (1) chestnut bur showed low cellulose, hemicelluloses and lignin contents, but high extractives and ash contents compared with poplar wood. Chestnut bur and poplar wood had the similar fiber morphology. (2) Composite board with relatively good performances could be manufactured with mix particles of chestnut bur and poplar wood. With the increasing of chestnut bur content, the mechanical properties of the composite board decreased, whereas the dimensional stability increased. (3) The total phenol content in the chestnut bur was as high as 13.79%. The phenolic substance in the chestnut burs could react with free formaldehyde. Hence, the free formaldehyde emission of particleboard was effectively reduced. In summary, waste chestnut bur is a suitable material which can not only be utilized as the base material, but also a natural free formaldehyde scavenger for composite particleboard production.