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Majalah Kulit, Karet, dan Plastik

MKKP
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Published by Kementerian Perindustrian Republik Indonesia

ISSN : 18296971 EISSN : 24604461 DOI : 10.20543

Core Subject : Engineering,

Engineering

Majalah Kulit, Karet, dan Plastik (Journal of Leather, Rubber, and Plastics) publishes original research focused on materials, processes, and waste management in the field of leather, rubber, and plastics.

Arjuna Subject : Teknik (semua kategori) - Tenik Industri dan Manufaktur

Articles 781 Documents

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Penelitian pembuatan motif âbatik remukanâ pada kulit kras samak krom Meiyanti, Meiyanti; Widari, Widari; Widowati, Titik Purwati; Basalamah, Hasan
Majalah Kulit, Karet, dan Plastik Vol 7, No 12-13 (1992): Majalah Barang Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Motif âBatik Remukanâ on the leather shows the attarctive performance; since it has produced many diversifikasi of pattern on the leathergoods. The result of this experimental is to reach the attractive motif of â Batik Remukanâ used the composition of batik wax which its consist of kote ; paraffin = 1:5.Â INTISARIÂ Motif batik remukan pada kulit dapat memberikanÂ penampilan yang menarik, sehingga dapat menghasilkan diversifikasi corak pada barang-barang kulit yang diproduksi. Hasil penelitian ini menunjukkan bahwa untuk mendapatkan motif batik remukan yang cukup menarik dipakai komposisi lilin batik yang terdiri dari kote : parafin = 1: 5.Â

Penelitian peningkatan mutu untuk mendapatkan hasil uji tegangan putus setelah aging dan perpanjangan putus sebelum aging kompon karet bantalan dermaga yang memenuhi SII 2281 â 88 Suprapto, Suprapto
Majalah Kulit, Karet, dan Plastik Vol 14, No 26 (1999): Majalah Barang Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

This research was aimed at gaining the compound rubber of dock Vender formula which has theÂ characteristic of optimal tensile strength after aging 70 + 1oC within 3 x 24 hours and the optimal elongation at bre ak before aging. This research used the amount of car bon black formula with variationÂ : 40,45,50,55,60,65, and 70 parts for each 100 partsof rubber. The research showedÂ that using the formula 40 : 100, the optimal tensile strength after aging 70 + 1oC during 3 x 24 hours resulted the average tensile st rength 19,79 newton/mm2. WhereÂ Â as the characteristic of the optimum elongation at break was gained at formula 40 part with the average elongation break 682,98% . The result showed that the elongation break aft er aging and elongation at breakÂ after aging fulfilled the specification of SII 2281 88 dock Vender.Â Â INTISARIÂ Penelitian ini bertujuan untuk mendapatkan formula kompon karet bantalan dermaga yang mempunyai sifat tegangan putus setelah aging 70 + 1oC selama 3 x 24 jam yang optimal, dan perpanjangan putus sebelum aging yang optimal. Dalam penelitian ini digunakan formula jumlah karbon black dengan variasi 40, 45, 50, 55, 60, 65 dan 70 bagian untuk setiap 100 bagian karet. Hasil penelitian ini menunjukkan bahwa tegangan putus setelah aging 70 + 1oC selama 3 x 24 jam optimal pada penggunaan carbon black 40 bagian dengan tegangan putus rata-rata 19,79 N/mm2. Sedangkan sifatÂ perpanjangan putus sebelum aging nilai optimum didapat pada formula carbon black 40 bagian dengan perpanjangan putus rata-rata 682,98%. Hasil uji tegangan putus setelah aging dan perpanjangan putus sebelum aging memenuhi persyaratan SH 2281-88 bantalan karet untuk dermaga.Â

Penelitian pemanfaatan lateks alam iradiasi pada pembuatan sepatu kanvas Murwati, Murwati; Setyowati, Penny; Nadilah, Sri
Majalah Kulit, Karet, dan Plastik Vol 11, No 21 (1996): Majalah Barang Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

The aim of the research is to applicate irradiation natural latex as cement material for sole and foxing of convas shoes. The process of shoe manufacturing is carried out using steam vulcanization system. Shoe production is tested their cemented strenght consisting of cemented strength testing of sole to canvas, and foxing testing to canvas. The result of cemented strength of canvas shoes Li compared with sulphuric vulcanization latex LA based on SNI -12-0172-1987, Canvas shoes for general purposes, proved that cemented strength of sole to canvas shoes Li = 10.660 N/6 mm is lower compared with canvas shoes LA. Cemented strenght of foxing to canvas shoes Li = 11.892 N/6 mm is higher compared with canvas LA. Cemented strength result to all testings of canvas shoes Li fulfills specification of SNI-12-0172-1987, Canvas shoes for general purposes, in addition irradiation natural latex can be used as cemented material in shoes manufacturing.Â INTISARIÂ Penelitian ini bertujuan untuk menerapkan lateks alam iradiasi sebagai bahan perekat untuk pemasangan sol dan foxing pada sepatu kanvas.Proses pembuatan sepatu dilakukan dengan sistim vulkanisasi uap, hasil sepatu diuji kekuatan rekatnya meliputi uji kuat rekat sol luar dengan kanvas dan uji kuat rekat foxing dengan kanvas. Nilai uji kuat rekat sepatu kanvas (Li) dibandingkan dengan nilai uji kuat rekat sepatu kanvas yang menggunakan perekat (lem) lateks alam vulkanisasi belerang (LA) dengan tolok ukur SNI-12-0172-1987, Sepatu kanvas sol luar dengan kanvas sepatu kanvas Li = 10,660 N/6 mm adalah lebih rendah dibandingkan dengan nilai kuat rekat sol luar dengan kanvas sepatu kanvas LA. Sedangkan nilai kuat rekat foxing kanvas Li = 11,892 N/6 mm adalah lebih tinggi dibandingkan dengan kuat rekat foxing dengan sepatu kanvas LA. Nilai kuat rekat untuk semua jenis uji sepatu kanvas Li memenuhi persyaratan SNI-12-0172-1987, Sepatu kanvas untuk umum, dengan demikian lateks alam iradiasi dapat digunakan sebagai bahan perekat (lem) pada pembuatan sepatu kanvas.

penelitian pemanfaatan minarex sebagai softener untuk pembuatan rol karet gilingan padi Buchori, A.; Sumasto, Yuwono
Majalah Kulit, Karet, dan Plastik Vol 9, No 16 (1994): Majalah Barang Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

The objective of the research is to use minarex (new product from PERTAMINA) as a softener for making rice mill roller compound. The formula of the compound applied four kinds of minarex, namely A, B, C and D minarex, type 2 and 3 each, by varying minarex : 3, 4, and 5 parts. The mastication and mixing process used two roll mill machine and the compound was vulcanized at 150oC the pressure 150 Kg/Cm2 and 9 minute curing time. Then it should be tested their_physical properties : tensile strength, elongation at break, abrasion resistance, hardness before and after aging. The result of the test statistically prove that all minarex for 5 parts is the best physical properties and fulfilled the specificatioh, of SII 1902 - 86 "Rol karet gilingan padi" except minarex A. The conformity of minarex as softener for rice mill roller compound is excellent.Â

Rancang bangun perekayasaan pabrik acuan sepatu pria dari bahan HDPE Yuniari, Arum
Majalah Kulit, Karet, dan Plastik Vol 7, No 12-13 (1992): Majalah Barang Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Efektivitas karet alam termoplastik sebagai peningkat indeks viskositas minyak pelumas kendaraan Puspitasari, Santi; Arifianto, Muhammad Lutfi; Kurniati, Mersi
Majalah Kulit, Karet, dan Plastik Vol 32, No 1 (2016): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Diversification of rubber goods are highly needed to enhance natural rubber domestic consumption. One of the efforts is by using thermoplastic natural rubber that is synthesized from emulsion graft copolymerization of natural rubber latex with thermoplastic monomer as index viscosity improver of lubricating oil. The research aimed to study the effect of thermoplastic natural rubber (natural rubberâstyrene copolymer) addition, at various concentration, into base paraffinic lube oil (HVI 60 and HVI 650) on index viscosity value of lubricating oil. The result showed that emulsion graft copolymerization at composition ratio of natural rubber to styrene monomer 85:15, at 65oC for 7 hours, with addition of 1% ammonium peroxidisulfate as initiator and 2% sodium dodecyl sulfate as surfactant produced thermoplastic natural rubber (TPNR, copoly NR-ST) with grafting efficiency of 56,48%. The TPNR can be functioned properly as index viscosity improver at 5% concentration to base paraffinic lube oil either HVI 60 or HVI 650. The obtaining new lubricating oils could fulfill the index viscosity standard requirement refered to Decree of Directorat General of Oil and Gas No 85K/34/DDJM/1998, and could compete with the commercial lubricating oil type 20W-50, 10W-40, and 15W-40.

Blends of nitrile butadiene rubber/poly (vinyl chloride): The use of maleated anhydride castor oil based plasticizer Dewi, Indiah Ratna; Indrajati, Ihda Novia; Setyorini, Ike
Majalah Kulit, Karet, dan Plastik Vol 32, No 1 (2016): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Recently, much attention has been focused on research to replace petroleum-based plasticizers, with biodegradable materials, such as biopolymer which offers competitive mechanical properties. In this study, castor oil was modified with maleic anhydride (MAH) to produce bioplasticizer named maleated anhydride castor oil (MACO), and used in nitrile butadiene rubber (NBR)/poly vinyl chloride (PVC) blend. The effect of MACO on its cure characteristics and mechanical properties of NBR/PVC blend has been determined. The reactions were carried out at different castor oil (CO)/xylene ratios, i.e. 1:0 and 1:1 by weight, and fixed CO/MAH ratio, 1:3 by mole. DOP, CO, and MACO were added into each NBR/PVC blend according to the formula. It was found that the viscosity and safe process level of NBR/PVC blend is similar from all plasticizer, however, MACO (1:0) showed the highest cure rate index (CRI). MACO-based plasticizer gave a higher value of the mechanical properties of the NBR/PVC blend as compared to DOP based plasticizer. MACO (1:1) based plasticizer showed a rather significance performance compared to another type of plasticizers both before and after aging. The value of hardness, elongation at break, tensile strength, and tear strength were 96 Shore A, 155.91 %, 19.15 MPa, and 74.47 MPa, respectively. From this result, NBR/PVC blends based on MACO plasticizer can potentially replace the DOP, and therefore, making the rubber blends eco-friendly.

Reaksi transfer hidrogenasi minyak jarak kastor serta aplikasinya sebagai bahan pelunak kompon karet Puspitasari, Santi; Cifriadi, Adi; Krisnawati, Krisnawati; Irawadi, Tun Tedja
Majalah Kulit, Karet, dan Plastik Vol 32, No 2 (2016): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Rubber plasticizer is used to improve rubber processability so as to shorten time and reduce energy consumption during compounding. In general, rubber plasticizer is nonrenewable and environmentally harmful petroleum derivatives due to the carcinogenic property. Environmentally friendly plasticizer can be produced by transfer hydrogenation of vegetable oil. The research was aimed to synthesize new rubber plasticizer from transfer hydrogenation of castor oil using diimide compound which was generated in situ by oxidation of hydrazine hydrate and hydrogen peroxide as well as the application of the new rubber plasticizer obtained on natural and synthetic rubbers compounding. The result showed that the optimum condition of transfer hydrogenation was achieved at a capacity of 1000 ml oil/batch, 40oC for 5 hours, and ratio hydrazine hydrate to hydrogen peroxide at 1:2 due to the hydrogenated castor oil (HCO) had the highest degree of hydrogenation and neutral pH. The application of 10 phr HCO had significant effect on the compounding of EPDM 6250 which was shown by shortest time and lowest energy of compounding, and also by the highest minimum torque modulus. In addition, the crosslink density of rubber vulcanizate which was formed during accelerated sulfur vulcanization was affected both by the addition of HCO and the saturation of the rubber being used.Keywords: environmentally friendly plasticizer, castor oil, diimide hydrogenation, rubber.Â

MKKP Vol. 32 No. 2 (2016) Reviewer Acknowledgement Sholeh, Muhammad
Majalah Kulit, Karet, dan Plastik Vol 32, No 2 (2016): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Reologi, sifat aging, termal, dan swelling dari campuran EPDM/NR dengan bahan pengisi carbon black N220 Yuniari, Arum; Nurhajati, Dwi Wahini; Dewi, Indiah Ratna; Setyorini, Ike
Majalah Kulit, Karet, dan Plastik Vol 32, No 1 (2016): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

The blends of EPDM and NR are immiscible in nature and incompatible. Introducing maleic anhydride as a compatibilizer into the blends was expected to produce compatible blends with balanced mechanical properties. The purpose of this research was to determine the effect of EPDM/NR ratio on the rheological, aging, thermal and swelling properties of the blends. The variation of EPDM/NR ratio were 100/0, 80/20, 70/30, 60/40, 50/50, and 40/60 phr. The blends were mixed using two roll mill. The results showed that the addition of NR affects the maximum torque, scorch time, and optimum vulcanization time. In the blends, EPDM plays an important role in improving aging, swelling, thermal properties.

Page 34 of 79 | Total Record : 781

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