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All Journal Jurnal Teknik Kimia USU JMM (Jurnal Masyarakat Mandiri) CHEESA: Chemical Engineering Research Articles Walisongo Journal of Chemistry Jurnal Ilmu Peternakan Terapan JPM: JURNAL PENGABDIAN MASYARAKAT Jurnal Teknik Kimia USU Livestock and Animal Research AGRIEKSTENSIA Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Nais Pinta Adetya
Program Studi Teknologi Pengolahan Kulit, Politeknik ATK Yogyakarta
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Medicine & Pharmacology Public Health Social Sciences Transportation Veterinary Other

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EFFECTS OF CASEIN AND ISOCYANATE CONCENTRATIONS AS CROSSLINKERS IN THE FINISHING PROCESS OF GOAT LEATHER FOR SHOE UPPERS Nais Pinta Adetya; Nur Mutia Rosiati; Sofwan Siddiq Abdullah; Emiliana Anggriyani; Laili Rachmawati; Mustafidah Udkhiyati; Abimanyu Yogadita Restu Aji; Ikmal Khalala
Walisongo Journal of Chemistry Vol. 9 No. 1 (2026): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology UIN Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v9i1.31481

Abstract

This study aimed to investigate the interaction between casein, used as a crosslinker, and binders in the leather coating process and to evaluate the quality of leather produced using casein crosslinkers compared with conventional isocyanate crosslinkers. The research methodology consisted of three stages: preparation and characterization of the crosslinkers, finishing of crust goat leather, and final testing. The FTIR spectrum of casein indicated the presence of stretching vibrations associated with functional groups related to coating performance. Leather quality was evaluated through color fastness to rubbing and leather softness tests. From a chemical reaction perspective, casein shows potential as a crosslinker when used in combination with isocyanate crosslinkers. PUD binders do not directly form covalent bonds with casein through –OH groups under normal conditions; however, strong physical interactions through hydrogen bonding can occur. In the presence of a crosslinker such as isocyanate, covalent reactions may take place, forming a stronger urethane/urea network. The rubbing fastness of all leather samples, except C1 (10 parts casein) and I3 (30 parts isocyanate), met the SNI standard.
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.
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.
THE EFFECT OF ANIONIC OIL ON THE SOFTENING PROCESS OF OLD STOCK UPHOLSTERY LEATHER USING PADDING METHOD Fadzkurisma Robbika; Nais Pinta Adetya; Sofwan Siddiq Abdullah; Atiqa Rahmawati; Heru Budi Susanto
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 23 No. 2 (2024): Berkala Penelitian Kulit, Sepatu, dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/8fwmew18

Abstract

Location and mechanism of leather storage that is not ideal can cause changes in the character of the old stock leather. One of the effects that is often found when storing finished leather is reducing skin softness. The conventional method of increasing leather softness of old stock is through a mechanical staking process. Staking will only be effective in softening the leather if the leather has enough oil content, if it doesn't have enough oil content it will potentially cause cracks in the grain. In this study, control leather (K) was only given mechanical treatment. Meanwhile, for treatment leather (T), the mechanical process is carried out before and after adding mayonnaise oil using a rubbing method on the flesh to maximize the oil lubrication effect on old stock leather. The use of anionic oil, mayonnaise oil, which is applied to the flesh of the skin using the wiping method on T skin, produces a higher difference in the increase in softness, namely 0.5 mm, when compared to K leather which only undergoes a mechanical process (staking and toggling), namely 0.3 mm. This shows that the addition of mayonnaise oil and emulsifier to the flesh is able to re-lubricate the leather fibers thereby increasing skin laxity.
UPGRADING REJECTED CRUST LEATHER INTO A BATTING GLOVE ARTICLE WITH A DIGITAL MATRIX EMBOSS MOTIF Erlinda Rahma Damayanti; Nais Pinta Adetya; Ragil Yuliatmo
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 23 No. 2 (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/efwa9j50

Abstract

The aim of the research is to upgrade goat crust leather which was declared rejected to be made into batting glove articles with digital matrix embossed motifs, so as to increase the quality and selling value of the leather. Rejected leather is leather that does not meet the specifications of the intended article, for example defects, thickness and area. The digital matrix motif has a 3D pattern, so apart from adding aesthetic value, the digital matrix application on batting gloves also increases user comfort. The raw materials used were 4 pieces of crust reject leather which had wrinkles, ticks, fleas and coarse grain defects. Repairs were carried out using 2 methods, namely 3 skins using method A (re-process retanning, finishing, re-fatliquoring) and 1 skin using method B (finishing, re-fatliquoring). Testing is carried out physically. The results of physical testing showed that skin using method B was better in the elongation test (52.3%>49.5%) and softness (6.1mm>5.4mm). The results of the skin color fastness test using method A have better scores, namely 4/5 for dry paint rubbing resistance (staining and change in color) and 3/4 (staining and change in color) for wet paint rubbing resistance.
PELATIHAN PEMANFAATAN LIMBAH FLESHING UNTUK PAKAN MAGGOT BLACK SOLDIER FLY Atiqa Rahmawati; Baskoro Ajie; Fadzkurisma Rabbika; Laili Rachmawati; Emiliana Anggriyani; Nur Mutia Rosiati; Nais Pinta Adetya; Ragil Yuliatmo; Swatika Juhana; Mustafidah Udkhiyati
JMM (Jurnal Masyarakat Mandiri) Vol 9, No 2 (2025): April
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jmm.v9i2.29235

Abstract

Abstrak: Permasalahan limbah padat fleshing dari industri penyamakan kulit menjadi hal yang perlu diperhatikan. Limbah fleshing umumnya hanya ditimbun di lahan atau dibakar yang dapat mencemari lingkungan. Tujuan dari pengabdian masyarakat ini yaitu terwujudnya pemanfaatan limbah fleshing sebagai pakan maggot dan meningkatkan nilai tambah limbah penyamakan kulit pada karyawan perusahaan penyamakan kulit di Yogyakarta dan untuk meningkatkan softskill dan hardskill peserta dalam budidaya maggot. Pelaksanaan kegiatan dilakukan di Kampus 1 Politeknik ATK Yogyakarta. Pelaksanaan kegiatan ini dibagi menjadi 3 tahap: (1) persiapan dan survei, (2) penyuluhan materi dan praktik budidaya maggot dari limbah fleshing, dan (3) evaluasi kegiatan diklat. Pelatihan dalam bentuk praktik budidaya maggot terdiri dari tiga tahap yaitu penetasan telur maggot, pembiakan telur maggot, dan pemanenan maggot setelah 9-14 hariPeserta merupakan karyawan perusahaan kulit di Yogyakarta yang terdiri dari 15 pesertaTingkat pemahaman peserta terhadap materi dikategorikan baik, dengan peningkatan nilai rata-rata pretest dari (78) menjadi posttest (86). Instruktur telah memenuhi kriteria dalam ketepatan waktu, kehadiran setiap proses dan mampu menyampaikan materi dengan baik dengan nilai rata-rata 4,7 (sangat baik). Penilaian seluruh aspek kegiatan yang meliputi tema atau materi diklat, metode diklat, fasilitas, dan penyelenggaraan diklat menunjukkan nilai rata-rata 4,68 (sangat baik).Abstract: The problem of fleshing solid waste from the leather tanning industry is something that needs attention. Fleshing waste is generally only dumped on land or burned, which can pollute the environment. The aim of this community service is to realize the use of fleshing waste as maggot feed and increase the added value of tanning waste for employees of tanning companies in Yogyakarta and to improve the soft skills and hard skills of participants in maggot cultivation. The activities were carried out at Campus 1 of ATK Yogyakarta Polytechnic. The implementation of this activity is divided into 3 stages: (1) preparation and survey, (2) counseling on materials and practices for cultivating maggots from fleshing waste, dan (3) evaluation of training activities. Counseling in the form of maggot cultivation practices consists of three stages, namely hatching maggot eggs, cultivating maggot eggs, and harvesting maggots after 9-14 days. Participants are employees of a leather company in Yogyakarta consisting of 15 participants. The level of participants' understanding of the material is categorized as good, with an increase in the average pre-test score from (78) to post-test (86). The instructor has met the criteria for punctuality, attendance at each process and is able to deliver the material well with an average score of 4.7 (very good). Assessment of all aspects of activities including training themes or materials, training methods, facilities and training implementation showed an average score of 4.68 (very good).
Optimization of Chromium (VI) Adsorption using Microalgae Biomass (Spirulina sp.) and its Application in Leather Tannery Waste Nais Pinta Adetya; Uma Fadzilia Arifin; Emiliana Anggriyani; Laili Rachmawati
CHEESA: Chemical Engineering Research Articles Vol. 6 No. 2 (2023)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v6i2.16315.105-117

Abstract

This study was conducted to examine the adsorption of Cr (VI) metal using Spirulina sp (inactive) biomass and its application in leather tannery wastewater. The treatment was carried out to determine the influence of independent variables on Cr (VI) adsorption with variations in pH, contact time, and metal solution concentration. The values of the solution pH, adsorption time, and concentration of the best metal solution were used to determine the center points of the optimization variables through Response Surface Methodology (RSM). The results showed that based on the FTIR test, macromolecules present in Spirulina sp biomass included amino, carboxylate, and hydroxy groups. The combination of factor variables that produced the optimum response was at pH 3.165, contact time of 66.58 minutes, and Cr (VI) metal ion solution concentration of 22.9 mg/L, resulting in a Cr (VI) adsorption efficiency of 69.66%. The adsorption pattern was included in the Freundlich adsorption isotherm, and the application of Spirulina sp biomass adsorbent to tannery waste reduced the concentration of Cr (VI) from 3.9 g/L to an undetectable level at <1.4 g/L.
Co-Authors Abdullah, Sofwan Siddiq Abimanyu Yogadita Restu Aji AMALIA, DIAN NUR Anggoro Tri Hatmanto Anggoro Tri Hatmanto Asfan, Muhammad Atiqa Rahmawati Atiqa Rahmawati Baskoro Ajie Baskoro Ajie Dina Mariana Uli Lubis Dwi Wulandari Elis Nurbalia Emiliana Anggriyani Endah Oktaviyana Endah Oktaviyana Erlinda Rahma Damayanti Fadzkurisma Rabbika Fadzkurisma Rabbika Fadzkurisma Robbika Heru Budi Susanto, Heru Budi Ikmal Khalala Laili Rachmawati Listyalina, Latifah Mita Ristanti Mita Ristanti Mustafidah Udkhiyati Mustafidah Udkhiyati Nabilla Indrakusuma Nabilla Indrakusuma Naimah Putri Nur Bahroin Jaman Nur Mutia Rosiati Nurwantoro Nurwantoro . Nurwantoro Nurwantoro Ragil Yuliatmo Ragil Yuliatmo Rahmawati, Atiqa RLMS Ari Wibowo Swatika Juhana Swatika Juhana Tutik Maryati Uma Fadzilia Arifin, Uma Fadzilia Wahyu Fajar Winata Wahyu Fajar Winata Wahyu Ratnaningsih Wijayanti Wisnu Pambudi