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All Journal Majalah Kulit, Karet, dan Plastik Jurnal Sains & Teknologi Lingkungan Communications in Science and Technology Jurnal Agrotek UMMat Jurnal Rekayasa Hijau Jurnal Teknologi Logic : Jurnal Rancang Bangun dan Teknologi Indonesian Journal of Halal Research Journal of Appropriate Technology for Community Services IJCR (Indonesian Journal of Chemical Research) Journal of Applied Agricultural Science and Technology Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Jurnal Teknologi Kimia Mineral
Muh. Wahyu Syabani
Politeknik ATK Yogyakarta
Religion Agriculture, Biological Sciences & Forestry Arts Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Social Sciences Other

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Pengaruh Waktu dan Suhu Penyimpanan Kompon Karet terhadap Karakteristik Vulkanisasi Muh. Wahyu Syabani; Suharyanto Suharyanto; Mertza Fitra Agustian; Lestari Hetalesi Saputri
Jurnal Teknologi Vol 10, No 2 (2023): Jurnal Teknologi
Publisher : Universitas Jayabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31479/jtek.v10i2.223

Abstract

A rubber compound is an intermediate product resulting from mixing rubber with other additives before being molded through a vulcanization process. Frequently, there is a delay between the compounding process and vulcanization, therefore proper storage procedures must be prepared. The presence of a vulcanizing agent, activator, and accelerator in the compound allows the vulcanization reaction to occur during the storage period. This study aims to analyze the effect of the storage time and temperature of rubber compounds on rubber vulcanization characteristics. The rubber compound is stored at room temperatures of 25oC and 32oC. On the 1st, 3rd, and 5th day of storage, the compounds were tested using a rheometer to obtain vulcanization parameter data. The values of MH, ML, ts2, tc90, cure rate index (CRI), and effective torque of each treatment were studied. The results showed that the storage time of the compound affected each of the observed parameters. In the range of 5 days, the longer time indicates the formation of polysulfide crosslinks in the rubber polymer chain network. Higher storage temperature also faster reaction rate during storage. The increasing number of cross-links resulting a longer induction period dan vulcanization time, lower CRI, and effective torque.
PENGARUH SUHU DAN TEKANAN INJEKSI TERHADAP CACAT SHORT SHOT PRODUK POLIKARBONAT PADA MESIN INJECTION MOLDING Ega Holiyan Meilia Langga; M. Wahyu Sya'bani; R. B. Seno Wulung
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 16 No 2 (2017): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

Nowadays, the application of the plastic covers a lot of aspects in the human activities, including on the leather products industry. The most common plastic producing processes used is injection molding. One of the plastics production primary problems in injection molding is short shots defect. The defect occurs because the melting plastic did not fulfill completely the mold cavity since the process parameters are not optimum. In This study analyzes the effect of the injection pressure and temperature on the short shots defect that occurs at polycarbonates production. The injection pressures and temperatures are varied, but keep the other process parameters at certain value. The result shows that at the constant temperature of 260oC, higher injection pressure would give lower defects for pressure range from 3 to 24 MPa. At 6 MPa the defects reach zero. When using various temperatures from 195 to 280oC at constant pressure of 3 MPa, the results shows that higher temperature would gives lower short shot defect.
PREDIKSI CHROMIUM RELEASE DARI BATAKO LIMBAH BUFFING PENYAMAKAN KULIT DENGAN SIMULASI MONTE CARLO M. Wahyu Syabani
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 14 No 1 (2015): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

Solid waste from buffing process in Leather Tanning Industries contains trivalent chromium salt. The trivalent chromium can be immobilized by using it as raw matexal in concrete manufacturing. Worst scenario was used in this chromium-r ease modeling also. The concrete was freely exposed to the environment and one side of the concrete was in continuous contact with water. The modeling result give us information that trivalent chromium can released to the body of the water, but it need long period until its concentration in water reached government regulation (l mg/L)
IDENTIFIKASI KULIT IKAN BUNTAL (Arothon reticularis) MENGGUNAKAN SCANNING ELECTRON MICROSCOPE (SEM) RLM. Satrio Ari Wibowo; M. Wahyu Syabani
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 14 No 1 (2015): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

The goal on this research is to known the characteristic of skin of puffer fish. The material that used was dry salted skin of •puffer fish (Ara thon reticularis) and the methods was Scanning Electron Microscope (SEM). SEM can checking materials microscopically to help explain characteristic of physical material. The result of this research is there is spines of puffer fish that firm and penetrate from epidermis unto dermis and becoming one on dermis. The differences between spines of puffer fish and hairs on mammals are there is no follicles that connecting the skin with spines due differences of composition compiler. Identification using SEM shows spines of puffer fish is modification of collagen that can be join with collagen at epidermis to dermis. For this reason the tanners could exploring skin of puffer fish as raw material in leather industries because the uniqueness of skin of puffer fish.
PEMBUATAN FATLIQUOR DARI CAMPURAN MINYAK SAWIT DAN KEDELAI Herry Suseno; Sri Sumarni; M.W. Syabani
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 13 No 1 (2014): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

Fatliquoring is one of important processes in leather tanning. Its main process function is to keep the quality of leather, especially on organoleptical test. The aim of this research is to study the blend of palm oil and soybean oil (1:1 ratio) as fatliquor raw materials. Palm oil was chosen because Indonesia has abundant material and also is one of main players in palm plantation and production. At the beginning, the raw material is analyzed to determine the quality, i.e. acid number, saponification number, iod number and fatty acid contains. Then the raw material is processed to be fatliquoring agent with sulfitation process. The fatliquoring agent was then analyzed to determine its quality and applied in fatliquoring leather. Finally, the leather mechanical characteristics were tested, i.e. tensile, elongation and stitch strengths. The result gives information that the application of fatliquor makes the leather have better test parameter. The value of tensile, elongation and stitch strengths for leather without fatliquor 160 kg/cm2, 63% and 82 kg/cm; and for leather with fatliquor 250 kg/cm2, 142% and 163 kg/cm. Therefore, fatliquoring agent made from palm oil and soybean oil blend can be used as alternative material in fatliquoring process.
PENGARUH PENAMBAHAN PHENOL FORMALDEHID TERMODIFIKASI NATRIUM SILIKAT TERHADAP LEM SEPATU BERBASIS KARET M.W. Syabani; Indri Hermiyati; R.L.M.S. Ari Wibowo
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 13 No 2 (2014): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

This research aim are to studying adhesion characteristic of shoes adhesive, ie viscosity, tack and peel strenght. Shoes adhesive made from natural rubber and synthetic rubber (SBR) with toluene as the solven. SRB composition in the mix are 0, 20, 40, 60, 80 and 100% weight. Three variation of phenol formadehyde composition are 40, 80 and 120 per hundred parts of rubber (phr). The results show us that the viscosity lower as the % SBR added is higher, and the loop tack has the highest value at 20% SBR added. The peel tack has highest value at 60% SBR added for three peel test model, except on the control sample. For every same % SBR composition, adhesive sample that has 40 phr phenol formaldehyde composition, gives higher loop tack and peel strenght value. We can conclude from this results that adhesive with 40% phenol formaldehyde composition will give optimum wettability from adhesive to substrat.
PENGARUH SUHU RUANGAN DAN KECEPATAN NIP ROLL TERHADAP KETEBALAN FILM PLASTIK HDPE Nastiti Afiati; Arief Krisna Wibowo; Muh. Wahyu Syabani
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 19 No 2 (2020): BERKALA PENELITIAN TEKNOLOGI KULIT, SEPATU DAN PRODUK KULIT
Publisher : Politeknik ATK Yogyakarta

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Abstract

HDPE-based plastic bag products are processed using a blown film extrusion machine. Problems that often occur during processing are the instability of plastic bubbles and the difference in thickness of the plastic sheet. The purpose of this paper is to determine the effect of room temperature on bubble instability defects to predict engine temperature settings. In addition, it provides a solution to overcome thickness difference defects caused by inappropriate nip roll speeds. Each defect problem was predicted using a polynomial trendline graph. The results show that the higher the room temperature, the unstable bubbles and vice versa. In order for the engine temperature to remain stable, the application of parameter settings according to room temperature can be carried out by looking at the room temperature trend. Furthermore, to keep the room temperature stable, the company needs to install an exhaust fan. While the results of observations and trend data on thickness difference defects obtained the optimal nip roll speed is 37.25-37.65 Hz for a thickness of 0.08-0.12 mm. The faster the nip roll, the less thickness it will be.
Pengaruh Waktu Pemanasan terhadap Kesesuaian Warna dan Tebal Kulit Sintetis berbasis Polivinil Klorida Ahmad Faisal Rosadi; Muh. Wahyu Syabani
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 21 No 1 (2022): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (744.023 KB)

Abstract

Kulit sintetis pada saat ini semakin banyak digunakan karena memiliki kelebihan proses yang lebih mudah dan biaya produksi rendah. Pembuatannya bahan ini secara umum melibatkan proses pelapisan dan pemanasan. Penelitian ini bertujuan untuk mengetahui pengaruh waktu pemanasan terhadap kesesuaian warna dan tebal kulit sintetis berbahan baku polivinil klorida. Kulit sintetis dibuat menggunakan bahan polimer PVC dengan penambahan aditif plasticizer DOP, filler kalsium karbonat, stabilizer, blowing agent azodicarbonamide dan pigmen. Pencampuran bahan menggunakan laboratory two roll mill pada suhu 160oC sedangkan pemanasan dilakukan pada oven drying dengan suhu 220oC. Ketebalan kulit sintetis divariasikan antara 0.5-2.4 mm dengan selisih tiap sampelnya 0.1 mm, sedangkan warna dibandingkan dengan referensi. Waktu yang diperlukan untuk mendapatkan warna dan tebal yang diinginkan kemudian dicatat. Hasil penelitian menunjukan jika waktu pemanasan yang terlalu lama dapat menyebabkan terjadi reaksi dehidroklorinasi sehingga warna kulit sintetis menjadi lebih gelap. Sedangkan kulit sintetis yang lebih tebal akan membutuhkan waktu pemanasan yang lebih lama. Akan tetapi perlu diperhatikan juga bahwa waktu pemanasan juga berhubungan dengan reaksi dekomposisi azodicarbonamide yang menghasilkan gas dan turut mempengaruhi ketebalan sampel.
Pengaruh Geothermal Silica terhadap Ketahanan Pelarut dari Komposit Karet Ditinjau dari Karakteristik Swelling dan Crosslink Density Muh. Wahyu Syabani; Mertza Fitra Agustian; Wisnu Pambudi; Suharyanto; Warmiati; Muhammad Ikhwan
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 21 No 1 (2022): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

Karet jenis poliisoprena, styrene butadiene rubber dan polybutadiene rubber dapat menghasilkan produk karet dengan karakteristik mekanik yang baik dan berbiaya rendah. Akan tetapi, jenis karet tersebut tidak memiliki ketahanan terhadap minyak yang baik. Penggunaan filler dapat memperbaiki kelemahan ini dengan memberikan interaksi antara filler dan karet sehingga memperbaiki struktur jejaring karetnya. Penelitian ini dilakukan untuk mempelajari pengaruh penggunaan as-given geothermal silica (AGS) dan silika komersial dalam jumlah tertentu sebagai filler terhadap nilai swelling dan crosslink density kompon karet. Vulkanisat karet disiapkan menggunakan alat two roll mill dan press molding. Sampel diuji swelling menggunakan dua jenis pelarut pada suhu yang berbeda, yaitu n-Pentana pada suhu kamar dan oli pada suhu 100oC. Nilai crosslink density didekati dengan tiga metode yaitu perhitungan modulus, pendekatan sarkawi dan persamaan flory-rehner. Hasil penelitian menunjukan jika vulkanisat karet yang diperkuat dengan AGS memiliki nilai crosslink density yang lebih tinggi dibandingkan chemisil. Sampel komposit memiliki ketahanan yang baik pada pelarut n-Pentana pada suhu kamar. Akan tetapi, kedua vulkanisat menunjukan nilai swelling yang tinggi saat berkontak dengan oil pada suhu 100oC.
Studi Perbandingan Sifat Mekanis Vulkanisat Karet Menggunakan Plasticizer Minyak Jelantah Epoksi Dan Komersil Andri Saputra; Pani Satwikanitya; Muh Wahyu Sya'bani; Mertza Fitra Agustian; Fitria Puspita; Putra Oktavianto
Rekayasa Hijau : Jurnal Teknologi Ramah Lingkungan Vol 7, No 2 (2023)
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/jrh.v7i2.138-151

Abstract

ABSTRAKTingginya jumlah minyak jelantah yang tersedia sebagai limbah menjadi tantangan terbesar. Asam lemak tak jenuh yang terdapat dalam minyak jelantah memiliki potensi sebagai bahan baku pembuatan plasticizer minyak epoksi. Di sisi lain, pengembangan plasticizer terbarukan berbasis bahan alam untuk menggantikan plasticizer fosil telah menjadi perhatian banyak peneliti karena isu menipisnya bahan baku minyak bumi, masalah lingkungan, hingga isu kesehatan yang ditimbulkan oleh plasticizer fosil. Penelitian ini bertujuan untuk mempelajari perbandingan sifat mekanis vulkanisat karet yang menggunakan plasticizer minyak jelantah epoksi terhadap plasticizer komersil (minyak parafinik dan minyak kedelai epoksi). Minyak jelantah yang masih mengandung asam lemak tak jenuh diproses epoksidasi dengan metode refluks (60oC selama 4 jam) menggunakan pelarut n-heksane, katalis asam asetat glasial dan resin amberlit IR-120, dan oksigen donor hidrogen peroksida. Minyak jelantah epoksi dikarakterisasi gugus oksiran menggunakan spektrofotometer FTIR dan bilangan oksiran menggunakan metode titrasi. Plasticizer minyak jelantah epoksi, minyak parafinik, dan minyak kedelai epoksi diaplikasikan pada kompon karet dan diuji sifat mekanis vulkanisat karet menggunakan mesin universal testing machine. Hasil penelitian menunjukkan spektra FTIR minyak jelantah epoksi memperlihatkan keberadaan vibrasi peregangan gugus epoksi (C-O-C) pada puncak 1240 cm-1 dan bilangan oksiran 2,24%. Hasil pengujian vulkanisat menggunakan plasticizer minyak jelantah epoksi (EUCO) memiliki nilai kekuatan tarik, kekuatan sobek, dan ketahanan kikis yang lebih unggul dibandingkan vulkanisat menggunakan plasticizer minyak parafinik (PO). Hal tersebut menunjukkan bahwa minyak jelantah epoksi mampu menggantikan plasticizer berbasis minyak bumi, seperti minyak parafinik (PO). Kekuatan sobek dan ketahanan kikis vulkanisat yang menggunakan EUCO lebih tinggi dibandingkan vulkanisat yang menggunakan minyak kedelai epoksi (ESO), meskipun kekuatan tariknya lebih rendah, sehingga mengindikasikan bahwa minyak jelantah epoksi yang disintesis dapat memberikan kinerja yang cukup baik sebagai plasticizer karet, sebanding dengan minyak epoksi komersial, seperti minyak kedelai epoksi.Kata kunci: Minyak jelantah epoksi, Plasticizer komersil, Sifat mekanis, Vulkanisat.ABSTRACTThe high volume of waste cooking oil is one of the biggest obstacles. Unsaturated fatty acids in waste cooking oil have the potential as a raw material for producing plasticizer of epoxy oil. The development of renewable plasticizers based on natural materials to replace petroleum plasticizers has become the concern of many researchers due to the issue of depletion of petroleum raw materials, environmental problems, and health issues caused by petroleum plasticizers. This research aims to study the comparison of mechanical properties of vulcanizated rubber using plasticizer of epoxy waste cooking oil to commercial plasticizers (paraffinic oil and epoxy soybean oil). Waste cooking oil containing unsaturated fatty acids was epoxidized by reflux method (60oC for 4 hours) using n-hexane as solvent, glacial acetic acid and IR-120 amberlite resin as catalyst, and hydrogen peroxide as oxygen donor. The epoxy cooking oil was characterized for oxirane groups using FTIR spectrophotometer and oxirane number using titration method. Epoxy waste cooking oil, paraffinic oil, and epoxy soybean oil were applied to rubber compounds and tested for mechanical properties of vulcanizatesd rubber using a universal testing machine. The results showed that the FTIR spectra of epoxy waste cooking oil showed the presence of epoxy group stretching vibrations (C-O-C) at a peak of 1240 cm-1 and an oxirane number of 2.24%. The test results of vulcanizates using epoxy waste cooking oil (EUCO) have superior tensile strength, tear strength, and scrape resistance values compared to vulcanizates using paraffinic oil (PO). This shows that epoxy waste cooking oil can replace petroleum-based plasticizers, such as paraffinic oil (PO). The tear strength and scrape resistance of the vulcanizates using EUCO were higher than those using epoxy soybean oil (ESO), although the tensile strength was lower, thus indicating that the synthesized epoxy waste cooking oil can provide quite good performance as a rubber plasticizer, comparable to commercial epoxy oils, such as epoxy soybean oil.Keyword: Commercial plasticizer, Epoxy waste cooking oil, Mechanical properties, Vulcanized rubber.
Co-Authors Agus Prasetya Agustian, Mertza Fitra Ahmad Faisal Rosadi Amirul Mukminin Amirul Mukminin Andreas D Angkasa Andri Saputra Andri Saputra Andri Saputra Arief Krisna Wibowo Cynthia Devi Ega Holiyan Meilia Langga Fikri Irfani Fauziyyah Fitria Puspita Heni Fitri Astuti Hermiyati, Indri Hernandha, Rahmandhika Firdauzha Hary Herry Suseno Ilmannafia, Danuraja Ina Amaliana Indahwati, Luthfi Auliya Indra Perdana Indri Hermiyati Iswahyuni Iswahyuni Khairunisa Betariani Listyalina, Latifah Lucky Wahyu Nuzulia Setyaningsih Mario Sarisky Dwi Ellianto Mertza Fitra Agustian Mertza Fitra Agustian Mertza Fitra Agustian Muhammad Firdaus Muhammad Firdaus Muhammad Ikhwan Muhammad Ikhwan Nastiti Afiati Pani Satwikanitya Pani Satwikanitya Prayitno, Kutut Aji Putra Oktavianto Qonita Usthufiya R. Lukas Martindro Satrio Ari Wibowo R. Lukas Martindro Satrio Ari Wibowo, R. Lukas Martindro Satrio Ari R.L.M.S. Ari Wibowo Raden Bagus Seno Wulung Ratri Retno Utami RLM. Satrio Ari Wibowo Rochmadi RR. Ella Evrita Hestiandari Saputri, Lestari Hetalesi Saraswati, Henny Satwikanitya, Pani Sri Sumarni Suharyanto Suharyanto Suharyanto Tintin Mutiara Uma Fadzilia Arifin Wahyu Ratnaningsih Warmiati Warmiati Warmiati Warmiati, Warmiati wisnu pambudi Wisnu Pambudi Yuli Suwarno Yuniarti Yuniarti Yuniarti Yuniarti Yuniarti Yuniarti