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All Journal Majalah Kulit, Karet, dan Plastik Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Sofwan Siddiq Abdullah
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Arts Chemical Engineering, Chemistry & Bioengineering Engineering Industrial & Manufacturing Engineering Social Sciences

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FTIR-PCA analysis as an initial analysis to distinguish the origin of skin and leather Ragil Yuliatmo; R. Lukas Martindro Satrio Ari Wibowo; Wisnu Pambudi; Sofwan Siddiq Abdullah; Thoyib Rohman Hakim; Yuny Erwanto
Majalah Kulit, Karet, dan Plastik Vol 37, No 1 (2021): 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 | DOI: 10.20543/mkkp.v37i1.6348

Abstract

Leather products are parts of daily fashion in Indonesia, such as bags, shoes, jackets, and gloves. Adulteration of raw materials for leather products can occur if there are no labels on these products. Various methods such as PCR, GC-MS, HPLC, and FTIR have been carried out to distinguish the origin of leather products. The FTIR method is known as an easy and inexpensive method to use. The objective of this study was to evaluate the capability of FTIR spectroscopy and Principle Component Analysis (PCA) for lipid identifcation and initial analysis to distinguish the original materials on leather products. Lipid extracts obtained from the various skin were scanned using an FTIR spectrophotometer at 4000–450 cm-1. It resulted in spectral differences in several wavenumbers (3000-2800 cm-1 and 1200-1000 cm-1). The same result is also found in lipid spectra from leather product extraction. The FTIR spectroscopy and PCA can differentiate pigskin and goatskin through specifc peaks in infrared spectra. This can be used as an initial analysis on determining the existence of skin adulteration in leather products. This study is prospective to be continued by chemometrics as quantitative analysis.
UTILIZATION OF AROMATIC SULPHONES IN THE UPPER SHOES LEATHER TANNING PROCESS Sofwan Siddiq Abdullah; Kuntoro; Fadzkurisma Robbika; Thoyib Rohman Hakim
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 22 No 2 (2023): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

Technology of leather tannery is influenced by laws and developments in technology, both domestically and internationally. Current research has a major focus on discovering new process technologies and materials that make the leather processing technology more optimal and environmentally friendly. Currently, most of the leather tanning processes in Indonesia still have normative stages, which consist of beam house operation, tanning, post-tanning (neutralization, retanning, dyeing, fatliquoring) and finishing stages. The purpose of this study is to alter the post-tanning procedure for upper shoes by using aromatic sulfones. By using aromatic sulfones, leather can be tanned without the requirement for neutralization. The results of this study are expected to educate tanneries and give them another choice for performing tanning techniques that are more efficient, more reasonably priced, and meet standards for the quality of finished leather. With the addition of aromatic sulfones, wet blue goat skin post-tanning can be finished in 225 minutes (3 hours 45 minutes), or roughly 21.43% of the typical processing time. This process modification can both speed up the tanning process and consume less water because no fresh water is needed during the post-tanning phase. Water savings in the post-tanning process can reach 400% of the total water used. With these advantages, it is believed that the tanning process for leather would become more effective and affordable. Furthermore, by using less water during the post-tanning process, liquid waste can also be decreased. In terms of organoleptics and mechanics, the rubbing resistance of post-tanning leather with with the addition of aromatic sulfones meets the requirements/standards for upper shoes.
REPAIR OF OLD STOCK COW LEATHER UPPER SHOES USING REFINISHING TECHNIQUES Sofwan Siddiq Abdullah; Anggoro Tri Hatmanto; Nais Pinta Adetya; Nur Mutia Rosiati
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 22 No 2 (2023): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

Finished skin for a long time will accumulate, overgrown mold, unpleasant odor, folds occur, uneven color and potentially damaged skin. This study aims to increase the optimality use of cowhide upper shoe articles of old stock cattle by refinishing techniques. The advantage of refinishing is the shorter process time than reprocessing, wet processing and continues refinishing. The stages are sorting, grading, preliminary test, refinishing treatment and final testing. Materials used are three pieces of leather that consist fullgrain nappa, softy mill nappa and correctedgrain. Nappa softymill skin requires mechanical toggling treatment because there are fold defects. Fullgrain and correctedgrain nappa leathers are immediately refinished. The analysis was organoleptical and physical analysis. Physical tests involve tensile strength, elongation, tear resistance, wet and dry rubbing resistance [4]. The results of physical tests of tear strength, elongation and tensile strength show that refinishing does not change much about the character of leather. The results of physical tests of tear strength, elongation and tensile strength showed that refinishing doesn’t change the character of leather. The refinishing process successfully increases the rubbing resistance of both dry and wet paints and organoleptically improves the quality of leather.
Co-Authors Anggoro Tri Hatmanto Fadzkurisma Robbika KUNTORO Nais Pinta Adetya Nur Mutia Rosiati R. Lukas Martindro Satrio Ari Wibowo Ragil Yuliatmo Thoyib Rohman Hakim Wisnu Pambudi Yuny Erwanto