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Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Published by Politeknik ATK Yogyakarta
ISSN : 14117703     EISSN : 27462625     DOI : https://doi.org/10.58533/bptkspk.v22i1
Core Subject : Art, Social, Engineering,
Arts Chemical Engineering, Chemistry & Bioengineering Engineering Industrial & Manufacturing Engineering Social Sciences
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit mencakup beberapa topik mengenai penyamakan kulit (enzim terapan, kimia terapan dan kimia lingkungan), produk samping kulit, teknologi karet, teknologi plastik, pengembangan mesin produksi, teknologi sepatu, dan pengembangan produk kulit yang diterbitkan oleh Politeknik ATK Yogyakarta, Indonesia. Jurnal ini juga mencakup penelitian-penelitian dari multidisiplin ilmu yang lain yang terkait dengan teknologi kulit, karet dan plastik.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 174 Documents
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ANALYSIS OF WATER ABSORPTION AND TOTAL CHROME LEACHING TEST USING ATOMIC ABSORPTION SPECTROPHOTOMETER (AAS) ON PAVING BLOCK SAMPLES MADE FROM WASTE LEATHER SHAVING Warmiati; Septiyana Windiastuti
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

Shaving waste from leather tanning can be utilized as a filler material in the production of concrete blocks. The manufactured concrete blocks are subsequently subjected to immersion for durations of 1, 3, 7, 10, and 14 days. Subsequently, the leached total chromium content from the soaked concrete blocks is tested using an atomic absorption spectrophotometer, by the Indonesian National Standard (SNI) 6989-84:2019, which outlines the procedure for testing dissolved and total metal content through atomic absorption spectrometry. Additionally, water absorption testing is conducted according to SNI 03-0349:1989 for concrete blocks used in wall construction. The aim of this research is twofold: to determine the water absorption capacity of three sample variations and compare the results against the SNI, and to ascertain the leached chromium concentration from the soaked blocks over a time range of 1 to 14 days, using an atomic absorption spectrometer and referring to the established environmental quality standards. The results obtained from testing the total chromium content released from the soaked concrete blocks meet the requirements of the quality standards for chromium content in leather tanning wastewater, as specified in Ministerial Regulation No. 5 of 2014 (maximum of 0.6 mg/L) and Local Regulation of Yogyakarta Special Region No. 7 of 2016 (maximum of 0.5 mg/L). Meanwhile, the water absorption testing outcomes for the concrete block samples derived from shaving waste comply with the stipulations of SNI 03-0349:1989. Sample codes A and B meet the criteria for quality level 1, with a maximum absorption of 25%, while sample code C meets quality level II standards.
LITERATURE REVIEW IN IMPLEMENTATION OF INDUSTRY 4.0 FOR FOOTWEAR INDUSTRY Eka Legya Frannita; Mochammad Charis Hidayahtullah
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

Industry 4.0 is an era of digitalization that offers convenience, efficiency and productivity in every field, including of footwear industry. This study aims to investigate the application of technology 4.0 in the footwear industry. This study is mainly discussing about the product cycle of the footwear industry, the distribution map of the application of technology 4.0 in the product cycle of footwear industry, a review of each technology related to footwear industry, as well as the challenges of implementing technology 4.0 in the footwear industry in the future. To reach the significant data, we collect some relevant publications from some reputable publishers in term of the employment of technology for footwear industry. According to the literature results, some technologies such as 3D printing, adaptive manufacturing, automation systems, IoT, augmented reality and artificial intelligence have been employed in the footwear industry. These technologies have been proven to provide benefits such as efficiency and effectiveness of the production process. However, despite technology 4.0 has been proven to provide significant benefits, implementing technology 4.0 still has challenges. The main challenges faced in implementing technology 4.0 are digital data problems, cost issues, connectivity issues and technology literacy issues for the community. Thus, a reasonably in-depth analysis is needed regarding these issues to support the implementation of technology 4.0.
UPGRADING PROCESS FINISHING GRAIN CRACKS ON COW CRUST LEATHER CORRECTED GRAIN BOX UPPER ARMY SHOES Wahyu Fajar Winata; Nabilla Indrakusuma; Nais Pinta Adetya
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

Crust-dyed leather is a product that has gone through the process of beam house operation, tanning, and post-tanning but has not gone through finishing. The purpose of this study is to overcome these problems by upgrading the finishing process to cover broken grain defects. The raw material used is rejected quality crust cowhide leather with 1 side broken grain defects. The finishing process upgrading method used to overcome this problem is buffing using 240-size sandpaper to erode broken grain parts to make them more disguised and impregnation with water, acrylic polymer (2350 RE), and penetrator (Biofin AU BK) 64). The impregnation solution can coat the cracked crust grain parts by forming new grains which have high shatter resistance properties. The results of leather testing after upgrading were carried out at the Rubber and Plastic Leather Center, Yogyakarta, obtained results that were following ISO 3379: 2015 standards, namely distension of grain at a crack of 8.60 mm and grain crack load of 467.28 N. It can be concluded that the buffing and impregnation in upgrading the finishing process can overcome the problem of cracked CGB upper army shoe grain crust cow skin and has met the burst resistance test standard ISO 3379:2015.
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.
UTILIZATION OF TANNERY SHAVING WASTE FOR MANUFACTURING SYNTHETIC LEATHER Naimah Putri; Ratri Retno Utami
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 23 No 1 (2024): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

Reusing leather waste is a global challenge in leather processing industry. Utilizing shaving leather waste using cost-effective mechanical methods can be used. Shaving waste is used as a filler for Polyvinyl Chloride (PVC) based synthetic leather. The amount of shaving waste used was varied, f1: 8%, s2: 15%, and f3: 20%. This research was conducted to determine the characteristic of synthetic leather derived from shaving leather waste including organoleptic and mechanical properties. The research method was carried in three stages, first was preparation, second was formulation, and third was testing. Testing is carried out based on the Indonesian National Standard (SNI) 1294;2009. The organoleptic results showed that there were no bubbles, cracks, wrinkles, and stains. The tensile strength values at f1, f2, and f3 were 10,433, 6,614, and 5,557N/mm2. The longitudinal tear strength values f4, f8, dan f12 were 25,972, 42,285, and 58,807N while the transverse tear strength values were 20,197N for f4, 38,009N for f8, and 54,288N for f12. The elongation test results for f4, f8, dan f12 were 54,862, 44,588, and 42,523% respectively. The addition of shaving waste of 8%, 15%, and 20% provides synthetic leather conditions that meet organoleptic and elongation standard. Meanwhile, the tensile strength and tear strength does not meet SNI because there was influence from composition/formulation on of other additives.
LABORATORY SCALE OF RAYON FIBER MANUFACTURING: MANUAL STIRRING AND STIRRING USING A MAGNETIC STIRRER Dewi Nurhidayati; Warmiati; Wijayanti
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 23 No 1 (2024): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

Laboratory scale production of rayon fiber has been carried out using manual stirring and a magnetic stirrer. The aim of this research is to compare rayon fiers produced through manual stirring and magnetic stirrer stirring. Experiments on making rayon on a laboratory scale are carried out for educational purposes which often have obstacles due to the limited availability of mixing equipment, such as magnetic stirrer. The method used in making rayon in this research is through the formation of cuprammonium ions. The results show that there is no significant difference between rayon produced manual stirring and magnetic stirrer stirring. It means that the manual mixing can be applied in the learning process for making rayon due in order to get around the limitations of available mixing equipments.
ENGINERING HOPPER DRYER BUFFER TOOL AT THE PLASTIC WORKSHOP OF POLYTECHNIC ATK YOGYAKARTA Muhammad Ikhwan; Diana Yuliastuti
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 23 No 1 (2024): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

The Plastic Laboratory is one of the Laboratories of the Rubber and Plastic Processing Technology Study Program located at the ATK Polytechnic Yogyakarta. Plastic Workshop has several machines including hopper dryer machines that cannot be functioned because of the absence of supporting devices. The design of this hopper dryer support device aims to help the process of operating the hopper dryer that has been in the plastic workshop. This buffer tool is designed according to needs by taking into account the ergonomic value of the machine and plastic workshop room. The design of the Hopper Dryer buffer consists of a Hopper Dryer holder table and a plastic ore transport funnel. In this study, in order to achieve the results of the hopper dryer support device design as expected, several stages or design steps were prepared starting from determining the list of needs, determining concepts, designing components, making detailed technical drawings, materials used, making products and trials. From the analysis of the use of the hopper dryer buffer tool made, it can be concluded that with this buffer device, the hopper dryer that initially could not be functioned can finally be operated properly so that it can help the drying process of plastic ore to be processed on the Blow Molding machine. From the trials carried out with the maximum load, the hopper dryer capacity is safe to use so that if each production process only uses 1/4 of the maximum capacity, the resulting load voltage of 1029 N is still very safe to use.
THE APPLICATION OF ARTIFICIAL INTELLIGENCE FOR DESIGNING BATIK MOTIF Eka Legya Frannita; Anwar Hidayat; Wawan Budi Setyawan
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 23 No 1 (2024): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

Artificial intelligence was a popular technology that was successfully utilized in several fields including of fashion industry. Recently, several research communities have been done in employing artificial intelligence for increasing the productivity. This research work aims to create batik pattern using artificial intelligence which was conducted in three major processes. The three processes were brainstorming process, designing process, and validation. Brainstorming process aimed to determine the restriction of this research work. Designing process focused on the utilization of artificial intelligence for creating batik pattern. In this process, we used online illustration maker based artificial intelligence. Validation process aimed to evaluate the originality of result. According to evaluation process using Google Lens, it can be concluded that the resulted design was original in which there is another batik patterns that similar to our result.
THE DEVELOPMENT OF SENTIMENT ANALYSIS APPROACH FOR IDENTIFYING CUSTOMER INTEREST IN LEATHER BAG Eka Legya Frannita; Anwar Hidayat; Wawan Budi Setyawan
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 23 No 1 (2024): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

Analyzing user interest has become one of the most popular research topics since identifying the user satisfaction played the essential role to prevent the company profit. This research work aimed to apply sentiment analysis approach for identifying the user interest in leather bag. This research was extremely beneficial to determine the satisfaction of leather bag customers. This research work was done by employing four stages. In the first process, we conducted brainstorming process for determining the exclusion and inclusion of research. In the next process, we collected the data by conducting crawling process from social media review. After collecting the data, we conducted data analysis process by labelling each review into three labels, which were positive sentiment, neutral sentiment and negative sentiment. In the last process, we visualized the result and we summarized the result. The visualization process illustrated that positive sentiment achieved percentage of 28%, neutral sentiment achieved percentage of 69% and negative sentiment achieved percentage of 3%. This result indicates that markets are neutral or not interest enough in leather bag. The analysis process also concluded that News obtained the highest total mentions indicating that Batik is not regularly mention in popular social media. According to those results, innovation or creativity about Batik is should be regularly generated in order to increase the market interest.
CONCEPT OF CLEANER PRODUCTION APPROACH DAN ZERO LIQUID DISCHARGE SYSTEM IN THE TANNERY INDUSTY Atiqa Rahmawati
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 23 No 1 (2024): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

Tanning industry is one of the industries that produces tannery waste water (TWW) which is dangerous to the environment. About 250 kg leather generating 15,000-50,000 of waste water. This increase environmental concerns regarding TWW. In this review, discussed the concept cleaner production (CP) approach at each process stage in the tannery process and the Zero liquid discharge (ZLD) system used in processing tannery liquid waste. The application of CP in the leather tanning industry is by substituting chemicals with environmentally friendly materials, management water, optimizing tanning conditions, and using technology to recycle and reuse liquid waste. The application of the ZLD system is one of the CP approach for recycle and reuse TWW. The ZLD system used in leather tanning is the Thermal-based ZLD system and Reverse Osmosis. Several countries have implemented the ZLD system, are the United States, India, China, European Union countries and Middle East. The ZLD system is an important TWW strategy to be implemented globally, although operating costs and high energy consumption are limitations in its application. Technological advances and exploration of new approaches to overcome the limitations of ZLD technology may make the approach more feasible and sustainable in the future.

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