Article Per Year (5 Year)
p-Index From 2021 - 2026
0
P-Index
This Author published in this journals
All Journal Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Prasetyo Hermawan
Staf Pengajar Politeknik ATK Yogyakarta, Program Studi Teknologi Pengolahan Kulit
Arts Chemical Engineering, Chemistry & Bioengineering Engineering Industrial & Manufacturing Engineering Social Sciences

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
STUDI PADA PROSES PEMBUANGAN KAPUR (DELIMING) KULIT KAMBING MENGGUNAKAN GAS CO2 Prasetyo Hermawan; Alfani Risman Nugroho
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 18 No 1 (2019): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (375.569 KB)

Abstract

This purpose of this research was to study the use of CO2 gas as an alternative material for deliming pelt of goat skin. In a glass reactor with a volume of 1 liter flowing with CO2 gas in varied flow, ie; 0, 10, 25 and 50 cc / minute. The float used is 200% based of the weight of the skin, then the data is taken from the liquid and the skin. The initial pH of lime water is 11.8 and after 30 minutes of CO2 gas flowing with a discharge of 25 cc/ min, the pH of lime water drops to 6.71 and after 60 minutes it became 6.39. Deliming liquid had an initial pH of 7.17 and a final pH without gas flow is 11.34, while the CO2 gas discharge was 25 cc/min the pH becomes 6.51. The TDS and conductivity of deliming liquid decreases when the CO2 gas discharge was raised, the final TDS at the CO2 gas discharge of 25 cc/min is 4354 ppm, while the final conductivity is 8798 µC/cm. The biggest compressibility of goat skin was in the flow of CO2 gas with a debit of 10 cc/minute, which was 16,71%. At the end of the deliming with CO2 gas discharged of 25 cc/min, the COD value increased by 47.1% to 3137 mg/l and the calcium content raised to 1.015%.
STUDI PENGARUH PENGGUNAAN BAHAN FIKSASI AL2(SO4)3 TERHADAP KULIT DOMBA YANG DISAMAK MENGGUNAKAN BAHAN PENYAMAK DARI TANAMAN GAMBIR (UNCARIA GAMBIER) Prasetyo Hermawan; Elis Nurbalia
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 18 No 1 (2019): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (421.136 KB)

Abstract

The purpose of this research was to study of the use of Al2(SO4)3 as fixation agent in taning sheep skin using tanin derived from gambier plants (uncaria gambir). A total 18 pieces of sheep skin were used using Al2(SO4)3 which was varied, ie; 0%, ½%, 1%, 1,5% and 2%, as a control 0,5% H2C2O4 is used. The physical characteristics of the liquid and the leather product were then tested and the test results were compared with the standard lining skin (SNI 06-0237-1989). Addition of 0,5% Al2(SO4)3 reduced the final pH of the fixation liquid from 5.43 to 3.99. The increase in skin thickness at the addition of 0.5% Al2(SO4)3 was 4.14% and in the control test was 5.29%. Skin shrinkage temperature increased from 60,50 0C to 73,17 0C at the addition of 1% Al2(SO4)3. Tensile strength and elongation tended to decrease with the increase in the amount of Al2(SO4)3, but all the results of tensile strength met with SNI because it is above 75 kg/cm2. Tear strength and oil contains of skin tended to decrease with the increase in the addition of Al2(SO4)3. The degree of tanning and tannin content of the skin tended to rise, at the addition of 0.5% Al2(SO4)3 the skin had a degree of tanning 55.23% and a tannin content of 24.66%. SEM test results showed the surface morphology of the skin became even and denser.
Co-Authors Alfani Risman Nugroho Elis Nurbalia