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All Journal Majalah Kulit, Karet, dan Plastik Jurnal Dinamika Penelitian Industri
Vachlepi, Afrizal
Balai Penelitian Sembawa - Pusat Penelitian Karet
Engineering Industrial & Manufacturing Engineering

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Peningkatan mutu blanket karet alam melalui proses predrying dan penyemprotan asap cair Vachlepi, Afrizal
Majalah Kulit, Karet, dan Plastik Vol 33, No 1 (2017): 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 (192.053 KB) | DOI: 10.20543/mkkp.v33i1.1702

Abstract

Most of Indonesian rubber products SIR 20 are made from the material of raw rubber obtained from smallholders. However, the quality of this material is not good enough. Thus, quality improvement has to be carried out by manufacturers. The liquid smoke used during the blanket hanging process can improve the quality of the rubber products SIR 20. This research aimed to determine and study the effects of liquid smoke spraying and blanket-hanging duration on the drying factor, the dry rubber content, technical quality, vulcanization characteristics, and physical properties of vulcanized natural rubber. Treatments consisted of various hanging duration (6, 8, and 10 days, and without hanging) and spraying (with and without spraying of liquid smoke). The results showed that the spraying of liquid smoke on natural rubber blankets could improve the technical quality of the natural rubber, especially the values of Po and PRI. The spraying of liquid smoke could reduce the blanket hanging duration to 6-8 days. The blankets sprayed with liquid smoke had the optimum cure time of around 15 minutes and 19 seconds and the scorch time of around 3 minutes and 22 seconds. These values indicated that the vulcanization characteristics of blankets which were sprayed with liquid smoke were generally better than those of blankets which were not sprayed with liquid smoke.Keywords: liquid smoke, natural rubber, blanket quality, hanging.
PRODUKSI KARET SIR 20CV MENGGUNAKAN FORMULA HIDRAZIN HIDRAT DAN AMMONIUM SULFAT SEBAGAI ADITIF Vachlepi, Afrizal
Jurnal Dinamika Penelitian Industri Vol 29, No 1 (2018): JURNAL DINAMIKA PENELITIAN INDUSTRI
Publisher : Balai Riset dan Standardisasi Industri Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1127.484 KB) | DOI: 10.28959/jdpi.v29i1.3485

Abstract

The main product of Indonesia natural rubber is SIR 20. The quality improvement can be done by converting the production of natural rubber SIR 20 to SIR 20 constant viscosity (SIR 20CV). The production of natural rubber SIR 20CV need the stabilizing agents among other a mixture of hydrazine hydrate and ammonium sulfate. The research purpose was to find out and to study the formulation and dosage of the mixture hydrazine hydrate and ammonium sulfate on the production of constant viscosity rubber. This research used factorial completely randomized design with the treatment factor consist of percentage of mixture hydrazine hydrate-ammonium sulfate (treatment A), additive dosage (treatment B) and control (HNS and blank/without additive). The treatment A consists of 50%:50% (A1), 70%:30% (A2), and 30%:70% (A3). The treatment B consists of 0.05% (B1), 0.10% (B2), 0.15% (B3) and 0.20% (B4). Parameters were latex coagulation condition, dry rubber content, and technical quality (initial plasticity/Po, plasticity retention index/PRI, Mooney viscosity/MV, stability viscosity index/SVI, volatile content and ash content). The analysis of technical quality was compared with requirements of SNI 06-1903-2000 about SIR. The results showed that the use of mixed additives of hydrazine hydrate and ammonium sulfate had a significant effect on the parameter pH of latex coagulation, dry rubber content, plasticity, Mooney viscosity, and viscosity stability index of the rubber SIR 20CV. The best treatment was obtained by the treatment of A3B1, which is 30% hydrazine hydrate and 70% ammonium sulfate with a dosage of 0.05%, because could produce natural rubber SIR 20CV with grade CV-70 in accordance with SNI 06-1903-2000.
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