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Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit

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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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PENGARUH KECEPATAN INJEKSI, TEKANAN INJEKSI DAN POSISI MOLD PADA PRODUKSI KURSI SANTAI BERBAHAN DASAR POLYPROPYLENE (PP) Wisnu Pambudi; Muhamad Choirul Mahfudin
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 21 No 2 (2022): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

Injection molding is making products made from plastic materials through melted plastic and then injected into a mold or mold. The plastic lounge chair is made of polypropylene (PP) by injection molding. In the injection molding process, there are parameters of injection speed, pressure, and molding position. This study aims to determine the effect of injection speed, pressure, and mold position. Injection speed, injection pressure, and improper mold position can produce a lounge chair with short-shot defects. Short-shot defects cannot be repaired but must be recycled by chopping them up to be reused as additional material for producing plastic products; this will increase operational costs. Efforts to reduce short shots can be done by changing the speed parameter settings, injection pressure, and mold position. Plastic lounge chairs, according to standards, were obtained by inverted mold position and injection speed settings in zones 1, 2, 3, 4, and 5 of 70, 60, 50, 45, and 30 in mm/s units. The injection pressures are 95, 85, 75, 65, and 55 bar.

KOMBINASI ENZIMATIS DAN KIMIAWI UNTUK MEMINIMALISIR PENGGUNAAN Na2S PADA PROSES UNHAIRING Luthfia Zahrotul Jannah; Mustafidah Udkhiyati; Wahyu Fajar Winata
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 21 No 2 (2022): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

This research focuses on reducing waste to achieve clean technology by applying a combination of enzymatic and chemicals during the unhairing process. The method applied is to reduce the use of Na2S and NaHS by 0.3% from 2.7% Na2S to 2.4%, 1,5% NaHS to 1.2%, and add a protease enzyme, namely centrobate 1000 LVU by 0.25%. The result based on the trial showed that the addition of an enzyme of 0.25% could remove the hair perfectly and reduce the level of swelling. Moreover, it can produce pickled skin with the same quality. The resulting production waste experienced a significant decrease in COD by 18%, while the BOD was less effective at 1.4%.

PERHITUNGAN NILAI KETIDAKPASTIAN (UNCERTAINTY) PADA UJI TEBAL KULIT MENGGUNAKAN ALAT UKUR THICKNESS Eko Nuraini; Prasetyo Hermawan
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 21 No 2 (2022): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

The manufacture of handicraft products or footwear requires materials according to standards. One of the materials for footwear products is tanned leather, the leather requires a certain thickness according to what has been required, this concerns the comfort and aesthetic value of the product being made. Producers of leather-based crafts need to know the thickness of the leather that will be used as the raw material. The problem is that laboratory personnel in carrying out tests have not carried out or made uncertainty calculations on the test results. The aim of the research is to calculate the uncertainty value of the sample test results with the thickness parameter. The activities will be carried out from May to June 2022 at the ATK Yogyakarta Polytechnic Physical Testing Laboratory. The material used for the box shell for the test method uses SNI 06-7128-2005. The tools used were thicknesses, tables, silver ink and stationery for the test treatment procedure ten times. The results of the study yielded data with an average value of 1.081; standard deviation of 0.02165; standard uncertainty value of calibration (µK) of 0.01; standard uncertainty value of precision (µP) of 0.0125 and a combined uncertainty value of 0.1468. Conclusion the thickness of the box skin is 1.081 ± 0.1468 so that the skin sample meets the requirements of SII 06-0234-1989 on a quality standard of 0.8-1.7 mm thick.

UJI BANDING ANTAR LABORATORIUM DALAM RANGKA PENINGKATAN KEPERCAYAAN TERHADAP LABORATORIUM PENGUJIAN FISIS POLITEKNIK ATK Eko Nuraini; Prasetyo Hermawan
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 21 No 2 (2022): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

One of the raw materials for footwear is Chrome tanned box leather with a thickness according to the applicable SNI quality standards. The problem with measuring skin thickness has received less attention from laboratory personnel during testing. The Quality Control Section is responsible for the implementation of quality assurance and quality control of test results. External quality control is carried out by cross-laboratory comparisons. The purpose of this research is to find out the competence of the Physical Testing laboratory as an executor in inter-laboratory comparison tests with skin thickness test parameters. The material used is cow leather. The test method uses SNI-06-7128-2005. stationary. The comparative test was carried out from June to August 2022 followed by the Physical Testing Laboratory as the executor of the activities (laboratory A), laboratories B and C. The test results obtained standard deviation for laboratory A vs B 0.1396 and laboratory A vs C 0.0795 . The t value for laboratory A vs B was 0.625 and laboratory A vs C was 1.85. Based on t table at 95% confidence level for laboratory A vs B 2.228 and laboratory Avs C 2.201, t count < from t table comparative test between laboratories is declared not significantly different or acceptable. Physical Testing laboratory personnel can be declared competent for the skin thickness test.

REDESAIN SAMPEL SEPATU KASUAL BACK TO SCHOOL MODEL PIKACHU DI PT PRIMARINDO ASIA INFRASTRUCTURE Tbk BANDUNG Zain Azmi Amanullah; Anwar Hidayat
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 21 No 2 (2022): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

Pikachu shoes model (back to school) are casual shoes produced by PT Primarindo Asia Infrastructure Tbk. by using the Tomkins brand for the needs of school and sports activities. Results of the observations, a problem was found, namely the discomfort after being tested for walking activities. The purpose of this study is to identify the problem of discomfort in the shoe and find a solution to repair. Problem solving method used is by conducting design experiments based on ergonomic aspects of shoes, while in data collection using observation methods, interviews, documentation and literature studies. The result obtained is that the initial design of the shoe uses an inappropriate upper and bottom material, namely the upper lacks good air circulation and the outsole material is less elastic and heavy. Design experiments were carried out using mesh materials on the upper and changes in the shape of the outsole design using phylon material in combination rubber on the bottom. Economically, the calculation of the cost increase of 15% is obtained, and it is still in the category of allowing it to be marketed because it still meets the feasibility of the production cost budget.

PENGARUH KOMBINASI BAHAN PENYAMAK NABATI DAN MINYAK TERHADAP MUTU FISIK KULIT JAKET Heru Budi Susanto; Baskoro Ajie
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 21 No 2 (2022): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

This research was aimed to determine the combination of vegetable tanning materials and Sulphited oil on the physical properties namely tensile strength, oil content, elongation, softness and shrinkage temperature and determine the factors that affect tensile strength, oil content, elongation, softness and shrinkage temperature leather tanning results. Raw hides/skins were processed up to acidification, pH was set to be 5 then tanned with the variation of vegetable tannin 15%, 17,5% and 20% respectively. Fatliquoring process used sulphited oil with variation of 12%, 15% and 18%. The jacket leather produced were tested using SNI 4593:2011. From this combination of treatment provided 9 (nine) treatment variation, each treatment was preformed triplicate. The results showed that the combination of vegetable tanning materials, 17.5% and 12% of sulphited oil was the result of variation in the optimum treatment for the leather to produce 208.29 N/mm2 tensile strength, oil content of 10.02%, 50.39% elongation and softness 5.13 mm and meets the requirements of SNI 4593: 2011 with the temperature shrinkage was at 79 oC. From the analysis of variance showed vegetable tanning material is the dominant factor affecting the tensile strength, oil conten and shringkage temperature. Sulphited oil is a factor that affects the oil content, elongation and softness. Keywords: jacket leather, vegetable tanning agent, sulphited oil

AKTIVITAS ANTIBAKTERI EKSTRAK ETANOL SAMBILOTO (ANDROGRAPHIS PANICULATA, NEES) TERHADAP STAPHYLOCOCCUS AUREUS Naimah Putri; Latifah Listyalina
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 22 No 1 (2023): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

The use of traditional plants can be used as natural antibacterial in preventing and treating infectious wound diseases caused by Staphylococcus aureus. One of the plants that can be used is bitter leaf. Sambiloto leaves contain several substances that can be used as antibacterial including alkaloids, flavonoids, saponins and tannins. The purpose of this study were to determine the lowest concentration of bitter leaf extract (Andrographis paniculata, Nees) which can inhibit and kill Staphylococcus aureus field isolates in vitro by dilution method. This research was expected to provide information on the benefits of bitter leaf as a drug that can be used in the treatment of infections against Staphylococcus aureus. This study used the dilution method which included Minimum Inhibitory Concentration (MIC) and Minimum Bacteriocid Concentration (MBC). The test results showed that bitter leaf extract (Andrographis paniculata, Nees) had the ability to inhibit the growth of Staphylococcus aureus starting at a concentration of 25% and had the ability to kill Staphylococcus aureus starting at a concentration of 50%.

ANALISIS PENERAPAN K3 (KESELAMATAN DAN KESEHATAN KERJA) PADA PENGOPERASIAN MESIN CRUSHER DI WORKSHOP PLASTIK POLITEKNIK ATK YOGYAKARTA Muhammad Ikhwan
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 22 No 1 (2023): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

The Plastic Laboratory is one of the Laboratories of the Rubber and Plastic Processing Technology Study Program located at the Polytechnic ATK Yogyakarta. Plastic Workshop has several machines including Injection Molding machine, Blow Molding machine, Crusher machine and Mixer machine. In the operation of the crusher machine, there is a danger of microplastics produced as a by-product of the plastic enumeration process where the raw material is in the form of a practicum reject product on the Injection Mold ing and Blow Molding machines. Microplastics are types of plastic waste that are smaller than 5 mm in size and are grouped into 2 types, namely primary and secondary microplastics. The transfer of microplastics from the environment into the human body can occur both primary (directly from the environment into the human body in inorganic form) and secondaryly (entering through the food chain, by consuming organisms polluted with microplastics). Primary transfer can occur through the digestive (digesti) and respiratory (inhalation) systems. Microplastics can enter the human body primarily through inhalation, because microplastics can float in the air. From the hierarchy of hazard control, Administrative Control and the application of Personal Protective Equipment is the hierarchy that best suits the conditions and needs in the plastic laboratory. Where with Administrative Control, which ensures that all people in the laboratory and practice who operate crusher machines are required to use Personal Protective Equipment, the impact of microplastic hazards can be minimized properly. Another thing to note is that the provision of engineering gloves, respirator masks and earmuffs should be done periodically and in sufficient quantities.

OPTIMASI DOSIS POLI ALUMUNIUM CLORIDA (PAC) UNTUK PENGOLAHAN LIMBAH PENYAMAKAN KULIT PADA PROSES KOAGULASIFLOKULASI Nanda Brilian Tantri; Swatika Juhana; Ragil Yuliatmo
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 22 No 1 (2023): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

Tujuan penelitian ini untuk mengetahui dosis optimum koagulan PAC pada pengolahan limbah penyamakan kulit proses koagulasi-flokulasi. Penelitian dilakukan dengan metode jar tes untuk mengolah limbah cair penyamakan kulit secara koagulasi-flokulasi. Koagulasi dilakukan dengan variasi dosis koagulan PAC 1%, 2%, 3%, 4%, dan 5% masing-masing 5 mL dimasukkan ke dalam gelas beaker berisi 300 mL limbah cair penyamakan kulit. Koagulasi dilakukan dengan pengadukan cepat 100 rpm selama 1 menit. Selanjutnya dilakukan flokulasi dengan menggunakan polielektrolit baseflok 1% masing-masing 3 mL. Flokulasi dengan pengadukan lambat 25 rpm selama 15 menit. Hasil jar tes diukur turbiditas, pH, dan dilihat jenis floknya. Hasil penelitian menunjukkan bahwa dosis optimum koagulan PAC untuk mengolah limbah penyamakan kulit adalah PAC 2% sebanyak 5 mL untuk volume limbah 300 mL, pada pH 7. Hasil ini dapat dikonversi ke dalam gram PAC/volume limbah yaitu 0,1 gram PAC/300 mL limbah atau 0,33 gram PAC/1L limbah cair penyamakan kulit.

KARAKTERISTIK FISIK DAN KIMIA GELATIN KULIT SAPI DENGAN JENIS DAN KONSENTRASI ASAM SEBAGAI LARUTAN PRE TREATMENT Dwi Wulandari; R.L.M. Satrio Ari Wibowo; Tantri Fauziah; A. Z.Tawarniate
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 22 No 1 (2023): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

The aim of the research was to study the physical and chemical properties of bovine skin gelatin soaked in different types and concentrations of acids and to obtain the types and concentrations of acids that could produce good quality gelatin. The materials used in the study were 10 kg of PO fresh cowhide, acetic acid, HCl and lime citric acid. The treatment applied was the percentage of acid, namely 3%, 4% and 5%. Parameters observed included yield, moisture content, ash content, pH, fat content, protein content, gel strength and viscosity. Statistical analysis was used with a completely randomized design with factorial pattern with 2 repetitions, as the first level is the type of acid, namely CH3COOH, HCL and C 6H8O7 and the second level is the percentage of acid: 3%, 4%, 5%. The data obtained were analyzed using ANOVA (Co Variance Analysis) based on a completely randomized factorial design. If there is a difference, proceed with Duncan's multiple area test. The interaction between the type of acid and the percentage of acid affects all parameters. Treatment with HCl gave the highest yield of 18.05% and the pH closest to normal was 4.62. Acetic acid treatment resulted in the highest protein content, gel strength and viscosity (95.94%, 222.01 Bloom, 10.44 cP). Treatment with lime citric acid obtained the lowest ash content of 0.36%.

Page 14 of 18 | Total Record : 174

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Jl. Prof. Dr. Wirdjono Prodjodikoro, Glugo, Panggungharjo, Sewon, Bantul, D.I.Yogyakarta

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Home Page

OAI Link

Editorial Team

Contact

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Google Scholar

Contact Name Erlita Pramitaningrum

Contact Email majalah2@atk.ac.id

Phone +628112855885

Journal Mail Official majalah2@atk.ac.id

Editorial Address Jl. Prof. Dr. Wirdjono Prodjodikoro, Glugo, Panggungharjo, Sewon, Bantul, D.I.Yogyakarta

Location Kab. bantul, Daerah istimewa yogyakarta INDONESIA

Abstract

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Contact Name
Erlita Pramitaningrum

Contact Email
majalah2@atk.ac.id

Phone
+628112855885

Journal Mail Official
majalah2@atk.ac.id

Editorial Address
Jl. Prof. Dr. Wirdjono Prodjodikoro, Glugo, Panggungharjo, Sewon, Bantul, D.I.Yogyakarta

Location
Kab. bantul,

Daerah istimewa yogyakarta

INDONESIA