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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/10.58533/8esa3597
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Berkala Penelitian Teknologi Kulit, Sepatu dan produk Kulit is a peer-reviewed, open-access journal that publishes original research articles, review articles, as well as short communication in all areas of basic and applied chemistry. Berkala Penelitian Teknologi Kulit, Sepatu dan produk Kulit covers the following topics. Arts Chemical Engineering, Chemistry and Bioengineering Engineering Industrial and Manufacturing Engineering Social Science The submitted manuscript should have relevance with Arts, Chemical Engineering, Chemistry and Bioengineering, Industrial and Manufacturing Engineering, and Social Science.
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Articles 85 Documents
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THE EFFECT OF TYPE OF POLYURETHANE IN THE FINISHING PROCESS ON THE QUALITY OF CAR SEAT LEATHER Alfiyatul Masruroh; Entien Darmawati; Elis Nurbalia
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 22 No. 2 (2023): Berkala Penelitian Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/x6pa8419

Abstract

This study aims to determine the effect of using bright binder polyurethane material in improving the shiny value in the finishing process of upholstery automotive article for car seat covers. The raw material used in finished dyed cowhide or finished leather with thockness of 1,2-1,4 mm with an area 5 sqft. The trial was carried out using 6 sheets of A4 size finish leather (21x29,7 cm) which would be re-fixed pe sheet with a different concentration of polyurethane for each trial. The method of improving the shiny value for upholstery automotive article is re-sprayed (re-fixative) with trial of variations in reducing matt polyurethane and variations is adding bright binder polyurethane to fixative (top coat) formulations, to get the shiny value according to the customer master sample standards, namely 1,1-1,2 GU. the measurement of the shiny value is carried out using a glossmeter. The result obtained are the addition of polyurethane bright binder 2% to get the best result to improve the shiny value of upholstery automotive for car seat covers. These results have met customer standars both form testing using a glossmeter and critical test carried out. The conclusion is that upholstery auutomotive leather has shiny value that meets the customer master sampel standards.
SLIP BEADING TECHNIQUE TREATMENT IN THE PROCESS OF MAKING OXFORD SHOES Abimanyu Yogadita R; Sanjaya Nugraha; Warsito
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 22 No. 2 (2023): Berkala Penelitian Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/p4c0tn90

Abstract

Slip beading is an edge treatment that is commonly carried out by the sports shoe industry. Slip beading is a treatment on the edges that can add to the appearance of shoes to be more aesthetic. Slip beading is actually very good even though the work is difficult because the ribbon for the slip beading can use a different color from the color of the top of the shoe, but by being clever in choosing the color you will get shoes with a good appearance and contrasting color variations. Difficulties in the application of variations of slip beading arise due to the thickness of the material and it is only possible to do it with sophisticated equipment. Based on these problems, it is necessary to conduct research on the application of slip beading variations on shoes with classic models. The method used in this research is a qualitative method with an experimental method. That is trying to test with several samples of size variations in slip beading and several materials to find the best composition of size variations and material variations. The results of this study are the emergence of oxford shoe designs with variations of slip beading that match the material and width of the shoe components.
EFFECT OF FeCl3 COAGULAN DOSAGE ON DECREASING TURBIDITY OF LEATHER TANNERY WASTE PROCESSING Nanda Brilian Tantri; Swatika Juhana; Ragil Yuliatmo
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 22 No. 2 (2023): Berkala Penelitian Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/bpfcjx20

Abstract

The leather tanning industry is one of the industries that produces liquid waste. The liquid waste of the leather tanning industry contains pollutants with a high level of turbidity. This research was conducted to determine variations in the dose of FeCl3 as a coagulant to reduce the turbidity of leather tanning wastewater. The coagulant added was 5 mL of FeCl3 with various doses of 1%, 2%, 3%, 4% and 5%. The optimum dose of FeCl3 coagulant to treat 300 mL of liquid waste is 3% with a volume of 5 mL, which means that 500 mg/L or 500 ppm is needed. The results showed a decrease in turbidity at the optimum dose was 94%, a decrease in chromium content of 83,53%. This shows that the effect of FeCl3 on reducing total chromium content and turbidity gives quite good results.
REPAIR OF BURNT DEFECTS IN CGB (CORRECTED GRAIN BOX) ARTICLES THROUGH THE FINISHING PROCESS Mita Ristanti; Nurwantoro; Nais Pinta Adetya
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 22 No. 2 (2023): Berkala Penelitian Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/kp96we92

Abstract

The purpose of this study was to repair Corrected Grain Box (CGB) leather which had burnt defects through a finishing process so that the finished leather could meet SNI 0234:2009 standards. The material used is CGB finish cowhide leather with reject quality for 1 side with an area of ​​16.50 sqft and a thickness of 1.76 mm as raw material. The chemicals used are stucco, flesh side binder, compact binder, soft resin compact, copolymer binder, adhesion, filler, acrylic binder, pigment, lacquer, thinner, and silicon. The research process consists of two stages, namely the implementation of the finishing process and testing. The finishing process includes coarse buffing, stucco, fine buffing, spray backside or flesh side, ironing, roll coating 1 (base coat), spray lacquer solvent 1, emboss sandblast 1, roll coating 2 (medium coat), spray lacquer solvent 2, staking, embossing sandblast 2 and measuring. The finish results of the CGB skin obtained were skin which initially had a burned defect area of ​​82%, after repairs the area of ​​the defect was reduced to <10%. Organoleptic testing consisted of color evenness and nerf release, while physical tests, namely the rubbing resistance of wet and dry paint, were carried out and all the results met the SNI 0234:2009 standard.
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 Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/npqk3r57

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 Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/pqpnp243

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 Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/xavr9d57

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 Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/hm7kfj11

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 softy mill 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.
THE EFFECT OF ADDING SURFACTANTS TO TOP COAT FINISHING ON THE APPEARANCE OF WHITE SPOT DEFECTS ON STEERING WHEEL LEATHER Endah Oktaviyana; Nais Pinta Adetya; Emiliana Anggriyani
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 23 No. 1 (2024): Berkala Penelitian Kulit, Sepatu, dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/5naqhk16

Abstract

The aim of this research is to determine the effect of using surfactant in the top coat layer on the appearance of white spot defects on the steering wheel leather. The appearance of white spot defects in the top coat layer is not expected because it disturbs the aesthetics of the skin and has the effect of uneven color on the skin surface, so the appearance of white spot defects must be prevented. The raw materials used in this research were 4 pieces of crust cowhide, with a thickness of 1.1-1.4 mm and an area of ​​1 sqft taken from 4 pieces of full hide leather. The main chemical used is non-ionic surfactant. The addition of non-ionic surfactant to the top coat layer was carried out with varying percentages of 0.5%, 1%, 1.5% and 2%. The tests carried out were organoleptic tests and physical tests. The results of the organoleptic test with the addition of 0.5% surfactant still showed white spot defects, whereas with the addition of 1%, 1.5% and 2% surfactant it met customer standards. The results of the physical test with the addition of 1% and 1.5% surfactant showed that the color fastness test did not fade, while with the addition of 2% the results obtained faded.
IDENTIFICATION OF DEFECTS IN THE OUTSOLE MANUFACTURING PROCESS OF REBECA ARTICLES USING SIX SIGMA ANALYSIS AT PT XYZ DKI JAKARTA Dede Dewi Soniastri; Abimanyu Yogadita Restu Aji
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 23 No. 1 (2024): Berkala Penelitian Kulit, Sepatu, dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/25b3d917

Abstract

PT XYZ located in DKI Jakarta is a company operating in the footwear sector. In the production process in the outsole section in Rebeca's article, several problems were found, namely dirty outsole, bubbled outsole, creeping outsole, and holey outsole. The aim of this research is to identify the factors that cause outsole defects in Rebeca's articles and to find out the results of the identification in an effort to reduce outsole defects in Rebeca's articles. The method for carrying out this research uses the Six Sigma method. The results of identifying the outsole of the Rebeca article show that based on the DPMO calculation of the outsole defect in the Rebeca article, an average DPMO value of 306.25 was obtained with a sigma level value of 4.94. This shows that the outsole production process has a capacity above the average level. sigma, but this has not achieved the target of improving the quality of Six Sigma, namely reaching a Sigma level of 6 Sigma. Proposed improvements that can be given to the factors that cause defects that occur in the outsole.

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