Penny Setyowati, Penny
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Pemanfaatan karet riklim dari skrap rubber roll untuk kompon sol sepatu Setyowati, Penny; Pramono, Pramono; Supriyanto, Supriyanto
Majalah Kulit, Karet, dan Plastik Vol 22, No 1 (2006): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1157.732 KB) | DOI: 10.20543/mkkp.v22i1.335

Abstract

The objective of the research was to study the effect of the used reclaim rubber from scrab rubber roll as a rubber substitution at rubber compounding for shoe sole production. The reclaime rubber was made by mixing between 100 part scrab rubber roll, 30 part reclaiming oil and 2 part reclaiming agent. The mixture was aged to swelling process for 24 hours and devulcanization was conducted at 1500C for 1.5 hours. Properties of the reclaim rubber were identified such as tension at break 46.55 kg/cm2, elongation at break 136.22%, hardness Shore A 52.8, acetone extract 30.4% and polymer contain 36.41%. The rubber compound was made by using special natural rubber of RSS I (Ribbed Smoke Sheet I) mixed with reclaim rubber at ratio of 100/0, 90/10, 80/20, 70/30, 60/40 and 50/50 phr (part hundred rubber) respectively and was also added additives. The mixing was conducted by using mixing mill at 400-600C for 50 minutes. The compound was concluded that the composition between new rubber RSS I and reclaim at the ratio 70/30 has obtained the most favorable physical properties, with respected testing result of tention at break 85.5 kg/cm2, elongation at break 195.3%, hardness 72.2 shore A, tear resistance 42 kg/cm2, permanent set at 50% elongation 0.27%, density 1.39 g/cm3, Grazelli abration resistance 4.05 mm3/kgm and flexing resistance at 150 kcs did not break. However, the physical properties of the compound was able to meet the SNI 12-0778-1989 class C except the abration resistance.  Keyword : reclaim, rubber roll, compound rubber, shoes sole   ABSTRAK Penelitian ini bertujuan untuk mempelajari pengaruh penggunaan karet riklim yang berasal dari skrap roll karet sebagai substitusi karet mentah pada pembuatan kompon karet untuk sol sepatu. Karet riklim dibuat dari skrap rubber roll 100 bb (bagian berat) dicampur dengan reclaiming oil 30 bb dan reclaiming agent 2 bb dalam mixing mill, campuran tersebut didiamkan selama 24 jam untuk proses penggembungan (swelling) kemudian didevulkanisasi pada suhu 1500C selama 1,5 jam. Karet riklim yang dihasilkan mempunyai sifat tegangan putus 46,55 kg/cm2, perpanjangan putus 136,22%, kekerasan 52,8 Shore A dan kandungan ekstrak aseton 30,4% serta kandungan polimer sebesar 36,41%. Kompon karet sol sepatu dibuat dari campuran karet alam Ribbed Smoke Sheets I (RSS I) dan karet riklim pada perbandingan berturut-turut 100/0 per hundred rubber (phr), 90/10 phr, 80/20 phr, 70/30 phr, 60/40 phr, 50/50 phr dengan bahan aditip pada jumlah tertentu. Pencampuran dilakukan dengan mixing mill kapasitas 2 kg, suhu 40-600C dan waktu 50 menit. Kompon yang diperoleh diuji sifat fisika vulkanisatnya dan hasilnya menunjukkan bahwa pada komposisi RSSI/riklim 70/30 phr merupakan komposisi terbaik dengan hasil uji fisika tegangan putus 85,5 kg/cm2, perpanjangan putus 195,3%, kekerasan 72,2 shore A, ketahanan sobek 42 kg/cm2, perpanjangan tetap (50%) 0,27 %, berat jenis 1,39 g/cm3, ketahanan kikis Grasselli 4,05 mm3/kg. m dan ketahanan retak lentur 150 kcs. Sifat-sifat fisis kompon dapat memenuhi syarat SNI 12-0778-1989 : Sol karet cetak untuk klas C kecuali sifat ketahanan kikisnya. Kata Kunci : karet riklim, rubber roll, kompon karet, sol sepatu.  
Penelitian “polymer blend” high styrene rubber dengan karet alam untuk “sponnge middle sole” Setyowati, Penny; Nadilah, Sri; Nurwati, Nurwati
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1266.523 KB) | DOI: 10.20543/mkkp.v14i26.303

Abstract

The objective of this research was find optimum composision of polymer blend of High Styrene Rubber (HSR) and Natural Rubber (SIR 3L) for preparation sponge middle sole that save the best fisical properties, strong, flexible, light, stable and thermoplastic properties. The formulation of rubber compound has to be researched as much as 3 formalition MS 1, MS II  and MS III with variation of SIR 3L, HSR and HAF black as follows, MS I 70-30-20 phr ; MS II 80-20-30 PHR and MS III 90-10-40 phr . From the fisical test analysis, optimum formulation to be reached at the compound formualtion  MS III with result of fisical test as follows : Tensile strength : 0.572 kg/mm2 ; Elongation at break : 204% ; Hardness share A : 55,8 : Density 0,728 gr/cm3 : Tear Resistance : 0,296 kg/mm2 and Compression Set 22,042%.  INTISARI  Tujuan penelitian ini adalah menentukan komposisi optimum “Polymer blend” dari  “High Styrene Rubber” (HSR) dengan karet alam SIR. 3L untuk pembuatan “spnge middle sole” yang memberikan  sifat-sifat fisika yang baik, kuat, lentur, ringan, stabil dan bersifat termoplastik. Formulasi kompon karet yang telah diteliti sebanyak 3 formulasi dengan variasi jumlah SIR 3l, HSR dan “HAF black” sebagai berikut :  MSI : 70-30-20 PHR : MS II = 80-20-30 phr dan MS III: 90-10-40 phr. Dari analisa uji fisika diperoleh hasil bahwa formulasi optimum dicapai pada MS III  dengan hasil uji sebagai berikut. Tegangan putus = 0,572 kg/mm2; perpanjangan putus ; 204% ; Kekerasan Share A = 5,8 ; Bobot jenis = 0,728 gr/cm2, Ketahanan Sobek = 0,296 kg/mm dan Pampat  tetap 22,042%. 
Pengaruh radiasi kopolimer dengan monomer metil metakrilat (MMA) pada lateks sebagai lem terhadap sifat kuat rekat Nadilah, Sri; Setyowati, Penny; Murwati, Murwati
Majalah Kulit, Karet, dan Plastik Vol 12, No 25 (1998): Majalah Barang Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (748.602 KB) | DOI: 10.20543/mkkp.v12i25.379

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Vulcanizing process of copolymer radiation with methyl methacrylate monomer 75 (per hundred parts of rubbers) of natural latex was done, and to application like adhesive for rubber shoes. This research was centered to find the influence of radiation copolymerization process of methyl methacrylate monomer, with the methods to compare the peel strength with natural latex. Natural latex was copolymer radiation processed with methyl methyl methacrylate monomer 75 (per hundred parts of rubbers), the radiation doses 5 kGy have peel strength as adhesives on rubber shoe more than natural latex, and the result fulfill the requirements of SNI. 12. 0172-1987 “Super Kanvas Umum”.  INTISARI Proses vulkanisasi secara radiasi kopolimer dengan monomer metil metakrilat 75 psk (per seratus bagian berat karet) terhadap bahan lateks alam dan lateks alam iradiasi telah dilakukan, dan digunakan sebagai lem untuk sepatu kanvas. Titik berat penelitian ini adalah mencari pengaruh proses kopolimerisasi radiasi dengan monomer metil metakrilat dengan cara membandingkan sifat kuat rekatnya dengan lateks alam. Ternyata lateks yang diradiasi kopolimer dengan monomer metil metakrilat 75 psk dengan dosis radiasi 5 kGy mempunyai sifat kuat rekat yang lebih baik dan memenuhi persyaratan standar mutu SNI. 12. 0172-1987 “Sepatu Kanvas Umum”.
Penelitian terapan sol karet cetak sesuai SNI. 12-0778-1989 sistim cetak tekan di industri kecil Cibaduyut Setyowati, Penny; Setyaningsih, Any; Budiwiyono, Budiwiyono
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (902.759 KB) | DOI: 10.20543/mkkp.v11i21.384

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The applaid research of rubber sole making in accordance with SNI.12-0778-1989 in the Cibaduyut small scale industri Bandung was conducted with the use of IRDLAI’s rubber compound formulation and the applica tion of the optimum vulcanization process condition that to be reached on trial. The physical test results to be evaluated with CRD methode proved not significant difference with the trial result in IRDLAI and fulfill SNI.12-0778-1989 “Moulding Rubber Sole”. INTISARI  Penelitian terapan pembuatan sol karet cetak sesuai SNI. 12-0778-1989 di Industri kecil Cibaduyut Bandung dilaksanakan dengan menggunakan kompon karet hasil formulasi BBKKP serta menerapkan kondisi proses vulkanisasi optimum yang dicapai pada percobaan pembuatan sol karet cetak di BBKKP. Adapun hasil uji fisisnya dianalisa statistik dengan metode CRD dan terbukti tidak berbeda nyata dengan uji fisis hasil percobaan di BBKKP serta memenuhi syarat SNI.12-0778-1989 “Sol Karet Cetak”.
Pengaruh waktu vulkanisasi terhadap kuat rekat antara foksing dengan kanvas pada sepatu kanvas untuk umum Nadilah, Sri; Setyowati, Penny; Murwati, Murwati
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1018.969 KB) | DOI: 10.20543/mkkp.v9i16.399

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Determination of curing condition at cemented process for canvas shoes vulcanization system is an important factor for producing optimal cemented strength value. Short curing gives low cemented strength value since latex or rubber compound is imperfect vulcanized. Long curing also gives low cemented strength value since a part of latex or rubber compound has got degradation. The research is carried out to obtain optimal curing time in order to obtain the highest cemented strength value. The glue applied is latex with operation condition steam vulcanization : chamber temperature 90 - 100oC, steam pressure 2,0 – 2,5 kg/cm2 variation time 30,40 and 50 minutes. Vulcanization product is tested for its cemented strength with the higest result 18,224 N/6 mm for 40 minutes curing time. The result fulfills specification SII. 1407 - 85 "Sepatu Kanvas Untuk Umum".
Karakteristik karet ebonit yang dibuat dengan berbagai variasi rasio RSS I/Riklim dan jumlah belerang Setyowati, Penny; Rahayu, Sutarti; Supriyanto, Supriyanto
Majalah Kulit, Karet, dan Plastik Vol 20, No 1 (2004): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1440.798 KB) | DOI: 10.20543/mkkp.v20i1.234

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The aim of the research was to study the influence of utilization of sulphur and reclaim rubber on the characteristics of ebonite rubber, and also to determine the optimum utilization of reclaim rubber and sulphur which yield good physical properties. Ebonite rubber was made by special natural rubber of RSS I (Ribbed Smoke Sheet I) mixed with reclaimed rubber at ratio 80/20, 70/30 and 60/40 part hundred rubber/part hundred rubber (phr/phr) and utilization of sulphur 30, 40, and 50 phr and also additives respectively. Mixing was done by using open mill, and vulcanization was conducted at early temperature 1200C for 2 hours, and it was continued by post curing at temperature 1500C for 2 hours. The physical properties such as tensile strength, elongation at break, D shore hardness, and izod impact of ebonite rubber vulcanized were determined. The result indicated that characteristics of ebonite rubber was significantly influenced by the amount of added sulphur and 40 phr reclaim rubber or at ratio of RSS I to reclaim rubber 60 to 40 phr/phr. However, the physical properties of ebonite rubber was able to meet the standard quality of group 2 regarding to Classification Hard Rubber issued by ASTM D 2135.    Key words : Ebonite, reclaim, sulphur, natural rubber. Penelitian ini bertujuan untuk mempelajari pengaruh penggunaan belerang dan karet riklim terhadap sifat karet ebonite serta menentukan jumlah penggunaan karet riklim dan belerang yang optimum yang menghasilkan sifat-sifat fisik yang baik. Karet ebonite dibuat dari karet alam RSS I yang dicampur denga karet riklim pada perbandingan berturut-turut 80/20, 70/30 dan 60/40 phr/phr serta penggunaan belerang berturut-turut 30, 40 dan 50 phr dengan bahan-bahan pembantu dalam jumlah tertentu. Pencampuran dilakukan dengan alat open mill dan vulkanisasi dilakukan pada suhu awal 1200C selama 2 jam, dilanjutkan post curing pada suhu 1500C selama 2 jam. Selanjutnya karet ebonite diuji sifat fisikanya meliputi tegangan putus, perpanjangan putus, kekerasan shore D dan pukul takik. Dari hasil yang diperoleh memperlihatkan bahwa penambahan belerang dan karet riklim berpengaruh secara nyata. Nilai optimum dicapai pada penggunaan belerang 30 phr dan karet riklim 40 phr atau pada perbandingan RSS I / karet riklim 60/40 phr/phr. Sifat-sifat fisik karet ebonite yang dihasilkan masuk standar kualitas kelompok 2 dalam klasifikasi hard rubber versi ASTM D 2135.  Kata Kunci  : ebonit, riklim, belerang, karet alam.
Penelitian penggunaan monomer n-butil akrilat untuk peningkatan mutu kulit secara iradiasi Nurhajati, Dwi Wahini; Wiryodiningrat, Suliestiyah; Kadarijah, Kadarijah; Setyowati, Penny
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (500.312 KB) | DOI: 10.20543/mkkp.v11i21.380

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Research on the utilization of n-butyl acrylate monomer for quality improvement leather by irradiation cobalt-60 gamma-rays is carried out as follows: Javanese crust hide was impregnated with water emulsions of n-butyl acrylate monomer for 2 hours, packed in to poly ethylene bags, sealed, then irradiated by cobalt-60 gamma rays (doses : 5 to 25 kGy). The irradiated leather was washed by water, dried and then physical tested. The results of physical  test of leather modified with n-butyl acrylate showed the increasing of tensile strength and elongation, decreasing of water absorption, resistance against the flexing test of 20,000 times, and PH was constant. Organoleptic test showed that the softly of the modified leather was no different with unmodified leather.  INTISARI Penelitian penggunaan monomer n-butyl akrilat untuk peningkatan mutu kulit secara iradiasi dilakukan dengan prosedur sebagai berikut : Kulit kras sapi Jawa diimpregnasi dengan emulsi monomer n-butil akrilat dalam air selama 2 jam, kemudian dimasukkan ke dalam kantung poli etilen, ditutup, selanjutnya diiradiasi dengan sinar gamma kobal-60 (dosis 5-25 kGy). Kulit yang sudah diradiasi dicuci dengan air, dikeringkan, lalu diuji sifat fisisnya. Hasil uji sifat fisis kulit yang telah dimodifikasi dengan monomer n-butil akrilat menunjukkan kenaikan kuat tarik dan kemuluran, penurunan penyerapan air, tahan terhadap bengkukan sebanyak 200.000  kali, dan PH tetap. Hasil pengamatan secara organoleptis menunjukkan  bahwa kelemasan kulit yang dimodifikasi tidak berbeda dengan kulit yang tidak dimodifikasi. 
Penelitian penggunaan campuran karet alam RSS dengan stiren butadien rubber (SBR) dalam pembuatan soft rubber lining Setyowati, Penny; Nadilah, Sri; Murwati, Murwati
Majalah Kulit, Karet, dan Plastik Vol 10, No 19 (1995): Majalah Barang Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1059.669 KB) | DOI: 10.20543/mkkp.v10i19.435

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The objective of this research is to obtain optimum composition of RSS and SBR compound for making soft rubber lining compound. Based on seven combination of trials in compound formulation proved that formulation with composition of RSS 50 parts and SBR 50 parts give the best physical properties and highly cemented on steel by using “Desmodur R” adhesive solution. INTISARI Penelitian ini bertujuan untuk mendapatkan komposisi optimum dari campuran karet RSS dan SBR dalam pembuatan kompon “soft rubber lining”. Dari percobaan 7 kombinasi dalam formulasi kompon, diperoleh hasil bahwa formulasi dengan komposisi RSS 50 bagian dan SBR 50 bagian memberikan sifat fisis yang baik serta hasil perekatan pada logam yang tertinggi dengan menggunakan bahan perekat “Desmodur R”.
Zeolit sebagai bahan pengisi pada kompon karet ditinjau dari sifat fisika vulkanisatnya Setyowati, Penny
Majalah Kulit, Karet, dan Plastik Vol 18, No 1 (2002): Majalah Barang Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1623.299 KB) | DOI: 10.20543/mkkp.v18i1.269

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Zeolities are natural rock found in a large – scale in Indonesia and it can be used as rubber and plastic filler. In this research, mordenite zeolite was used as a rubber compound filler at 50 – 100 phr (per hunddreed rubber) variation and with High Abrasion Furnace (HAF) black and minarex oil combination by 10/6 and 20/8 ratio. The aim of the research was to study the influence of zeolite in rubber compound, concerning to physical properties of the vulanicase. The effect of zeolit addition on rubber compound was a decrease in the tension break 13.85-15.33%, the elongation break 9.5-12 %, the tear resistance 9.1-23.1 % and the abrasion resistance 15.75-23.95% of the volcanicase, while the hardness was increase 10 %. Decreasing of such physical properties can be prevent by mixing it with HAF black and minarex oil combination. The best result was reached at application of zeolite 50 phr with HAF black and minarex oil combination.                           . Key words : Zeolit, rubber, filter.
Penelitian “rubber blend” antara karet alam rss dengan karet sintesis jsr 0061 untuk sol ringan sesuai sni 12-0778-1989 Setyowati, Penny; Murwati, Murwati; Nadilah, Sri
Majalah Kulit, Karet, dan Plastik Vol 12, No 24 (1997): Majalah Barang Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1059.189 KB) | DOI: 10.20543/mkkp.v12i24.306

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The objective of this research is to find composision of rubber blend of RSS and JSR 0061 and Carbon black for preparation light rubber sole compound and stabile on high process temperature that give the best fisical properties and the best sole product at moulding vulcanization trial. The best rubber compound to be reached at the compound formulation R III with composision of RSS 90 phr, JSR 0061 10 phr dan carbon black 40 phr.  INTISARI Tujuan dari penelitian ini adalah mendapatkan kompsisi campuran karet alam RSS dan karet sintetis JSR 0061 serta carbon black, untuk pembuatan kompon karet sol ringan dan stabil pada suhu proses tinggi yang memberikan sifat- sifat fisika terbaik serta menghasilkan produk sol yang terbaik pada uji coba ceta vulkanisasi. Kompon karet terbaik dicapai pada formulasi kompon R III dengan komposisi RSS 90 phr, JSR 10 phr dan carbon black 40 phr.