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Delvitasari, Febrina
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KARAKTERISTIK SIFAT FISIKA KOMPON KARET ALAM SEBAGAI BAHAN DASAR FOOTSTEP SEPEDA MOTOR DENGAN BERBAGAI FORMULA maryanti, Maryanti; Delvitasari, Febrina; Winarto, Winarto
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 (789.288 KB) | DOI: 10.28959/jdpi.v29i1.3773

Abstract

Pembuatan kompon footstep sepeda motor dilakukan untuk mendapatkan campuran yang homogen antara karet dan bahan kimia pembantu.  Kompon dicetak dengan waktu, suhu dan tekanan tertentu sehingga menjadi produk.  Komposisi/formulasi yang tepat sangat diperlukan untuk mendapatkan sifat fisika kompon yang baik.  Hasil pengujian sifat fisika kompon menunjukkan bahwa ketiga formulasi yang dibuat (F1, F2, dan F3) memiliki nilai uji kuat tarik (N/mm2) lebih baik bila dibandingankan dengan kompon pabrikan (FP) yaitu 13.12 (F1), 10.79 (F2), 7.73 (F3), dan 6.89 (FP), tetapi memiliki nilai yang lebih rendah untuk uji kuat sobek (N/mm) yaitu 2.36 (F1), 2.70 (F2), 2.86 (F3) dan 4.50 (FP), serta kekerasan (Shore A) yaitu 15 (F1), 18 (F2), 22 (F3), dan 49 (FP).
Pengaruh Persentase Enzim Papain dan Bawang Putih pada Rendemen dan Kualitas VCO (Virgin Coconut Oil) Prayugo, Munir Putro; Ersan, Ersan; Delvitasari, Febrina
Jurnal Agro Industri Perkebunan Volume 6 No. 2, Oktober 2018
Publisher : Politeknik Negeri Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.036 KB) | DOI: 10.25181/jaip.v6i2.817

Abstract

VCO is an oil produced from coconuts that are treated with no heating, one of them using papain enzyme. Vegetable oil is a compound that is easily hydrolyzed and oxidized to make the quality of oil decline. Garlic is a natural antioxidant that can inhibit the oxidation process. Therefore, a study was conducted to determine the effect of papain and garlic enzymes on the rendement and storage duration of VCO. This study used a factorial randomized block design with the first factor was percentage of papain enzyme (0%, 0,15%, 0,20%, and 0,25% and the second factor was percentage of garlic (0%, 0,5%, and 1 %) with 3 replications. The data of the research were analyzed by variance, followed by LSD test at 5% level. The results showed that the highest VCO rendement was obtained from the treatment of 0,25% papain enzyme. One percent (1%) garlic can maintain the quality of water content, FFA, density, and color of VCO at 3 months storage duration, except aroma. The combination of papain and garlic enzymes resulted in negative effect on rendement and cannot maintain VCO quality at 3 months storage duration. Keywords: enzyme papain, garlic, VCO storage
Pengaturan Dosis Asap Cair Berbahan Baku Tempurung Kelapa Sebagai Bahan Penggumpal Lateks Sarbaini, Andrevil; Edison, Rachmad; Delvitasari, Febrina
Jurnal Agro Industri Perkebunan Volume 6 No. 2, Oktober 2018
Publisher : Politeknik Negeri Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.036 KB) | DOI: 10.25181/jaip.v6i2.791

Abstract

In the processing of solid rubber, such as the manufacture of crumb rubber and rubber smoke sheet, one of the most important stages is the coagulation process using coagulant. The coagulation process is instrumental in determining for quality the rubber produced. Low quality of bokar is caused by farmers using coagulant which are not recommended. Because of that, it’s necessary to found the alternative coagulant that does not damage the quality and the price is relatively cheap. The purpose of this research is gets the best dosage of coconut shell liquid smoke for latex coagulation and to evaluate quality crepe rubber coagulum using coconut shell liquid smoke. The quality observed is dirt content, ash content, volatile matter, PRI, Mooney viscosity, and color index was implemented at PTPN VII, Way Berulu, Pesawaran District. The doses used were 0,1%, 1,5%, 2%, 2,5%, and 3%. The result showed that the most effective dose used in this research was 1% with quality approaching formic acid treatment. Keywords: coconut shell, formic acid, latex coagulant, liquid smoke
Co-Authors Ersan, Ersan maryanti, Maryanti Prayugo, Munir Putro Rachmad Edison, Rachmad Sarbaini, Andrevil Winarto, Winarto