Penny Setyowati
Unknown Affiliation

Published : 14 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 14 Documents
Search

Karakteristik karet ebonit yang dibuat dengan berbagai variasi rasio RSS I/Riklim dan jumlah belerang Penny Setyowati; Sutarti Rahayu; 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

Abstract

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.
Pengaruh pengaktifan kembali lem sintetis terhadap kekuatan rekat (peel strenght) pada proses pengesolan sepatu plastik, sol karet, sistem pres dingin Penny Setyowati
Majalah Kulit, Karet, dan Plastik Vol 6, No 10-11 (1991): 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 (1249.709 KB) | DOI: 10.20543/mkkp.v6i10-11.466

Abstract

This research is an ecxperiment on the influence of reactivated temperature and time of synthetic adhesive upon peel streght on plastic shoes adhesion processes, made at synthetic leather uppers, rubber soles and used GB and PC adhesives. The upper side of shoes and sole are brushed with PC adhesive as a supporting adhesive and then continued with GB adhesive, to be aged for at least 24 hours until they become dried. Then they are reactivated at the temperature varied between 60ο C - 90 ο C with temperature interval of 10 ο C, and time varied between 10 -25 minutes with time interval of 5 minutes. They are stuck and pressed at 2.5 kg/cm2 for 2 minutes. The peel test results is calculated by statiscal method. So that the experiment result proved that the influence of heat on synthetic adhesive reactivated is to increase adhesion. Optimal peel test value was reached at the reactiveated temperature of 80 ο C and time of 15 minutes. INTISARIPenelitian ini merupakan penelitian mengeni pengaruh suhu dan waktu pengaktifan kemabali lem sintesis terhadap kekuatan rekat (peel strenght) pada proses pengesolan/pengeleman sepatu plastic, atasan kulit imitasi, sol karet, lem yang diguakan lem sintesis GB dan PC. Sepatu bagian atas dan sol doolesi lem PC (sebagai lem pembantu) kemudiajn GB, dibiarkan minimal 24 jam seampai lem menjadi kering, kemudian diaktifkan pada suhu berfariasi 60ο C - 90 ο C dengan interval 10ο C dan waktu 10-25 menit tekanan 2,5kg/cm2. Uji kuat rekat antara soal luar dengan sol dalam (peel test) dilakukan dengan alat tensile steght. Hasilnya dievaluasi secara statistic dan disimpulkan bahawa : Pegaruh pemanasan pada pengatifan kembali lem sintesis adalah meningkatkan nilai kuat rekatanya. Suhu dan waktu pengaktifan yang memberikan nilai kuat rekat tertinggi adalah suhu 80ο C waktu 15 menit. 
Penelitian pemanfaatan lateks alam iradiasi pada pembuatan sepatu kanvas Murwati Murwati; Penny Setyowati; Sri Nadilah
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 (819.914 KB) | DOI: 10.20543/mkkp.v11i21.387

Abstract

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. INTISARI 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 penggunaan campuran karet alam RSS dengan stiren butadien rubber (SBR) dalam pembuatan soft rubber lining Penny Setyowati; Sri Nadilah; 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

Abstract

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”.
Penelitian “rubber blend” antara karet alam rss dengan karet sintesis jsr 0061 untuk sol ringan sesuai sni 12-0778-1989 Penny Setyowati; Murwati Murwati; Sri Nadilah
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 | DOI: 10.20543/mkkp.v12i24.306

Abstract

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.
Pengaruh radiasi kopolimer dengan monomer metil metakrilat (MMA) pada lateks sebagai lem terhadap sifat kuat rekat Sri Nadilah; Penny Setyowati; 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

Abstract

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”.
Uji coba pembuatan sol karet cetak sesuai SII 0944 – 84 sistem cetak “hand press” Penny Setyowati
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1154.917 KB) | DOI: 10.20543/mkkp.v7i12-13.477

Abstract

The trial on making of rubber sole fulfilling the SII 0944 – 84 with hand press molding system was using rubber compound on the formula of : RSS I 100 parts; Reclain rubber 30; ZnO 3; Carbon black 60; Paraffinic oil 6; Stearic acid 2; PBN 1; MBT 0,5; MBTS 0.5; TMT 1 and Sulfur 2. The vulcanization condition with time interval 0.5 minutes. Physical testing of rubber sole trial  result, statistical evaluation with CRD method for determining vulcanization time for resulting optimal physical testing. Optimal physical test value was reached on the time of vulcanization 6 to 7 minutes and temperature of vulcanization between 150-1600 C.
Penelitian terapan sol karet cetak sesuai SNI. 12-0778-1989 sistim cetak tekan di industri kecil Cibaduyut Penny Setyowati; Any Setyaningsih; 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

Abstract

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”.
Plastik nonwoven sebagai pengemas bahan makanan yang bersifat breathable Penny Setyowati
Majalah Kulit, Karet, dan Plastik Vol 19, No 1 (2003): 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 (1058.718 KB) | DOI: 10.20543/mkkp.v19i1.250

Abstract

Nonwoven plastic is a new material for packaging  that has some special quality among the other things such as flexible, higher strength, hydrophob, breathable and hygienes. The technology of nonwoven plastic is spunbond technolog which is a clean technology and produce a non fibre product. The raw material of nonwoven plastic is food grade polypropylene, so that the products are safe for food packaging. Recently just pioneered of nonwoven plastic application as innerliner of plastic sack that can replace “karung goni”as rice packaging and replace cotton sack as meal or flour packaging. Therefore  grains that have not been prepared yet, respiration activity is very important to be breathable characteristic of nonwoven plastic is able to support air circulation very well and also to keep humidity balance in the packaging. At the flour packaging, beside hydrophob characteristic, however breathable characteristic is necessary too because flour  has a tendency to absorb water and flour stability must be kept at 13.5 – 14% moisture content. The first experiment was taken by PT. Boma Internusa concerning with rice storage that use nonwoven plastic packaging as innerliner of plastic sack during 2 months, and analysis showed that the rice did not smell, louse unfolding was decrease 9fumigation cost was low), yellow grains and broken grains were decrease and did not occur any change of color. In the experiment of flour storage during 3 months gave an analysis that flour wsa still having good condition and fulfilled the standard trade. Keywords: Nonwoven, food packaging, plastic. 
Penelitian penggunaan monomer n-butil akrilat untuk peningkatan mutu kulit secara iradiasi Dwi Wahini Nurhajati; Suliestiyah Wiryodiningrat; Kadarijah Kadarijah; Penny Setyowati
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

Abstract

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.