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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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ARANG AKTIF KAYU WARU (Hisbiscus tiliaceus) SEBAGAI BAHAN PENGISI KOMPON SOL LUAR SEPATU CASUAL Himawan Hendro Santopo
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 15 No 2 (2016): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

The objective of this research was to obtain a weight (per hundred rubber) of hibiscus wood active carbon as a filler and vulcanization time in the outsole compound production of casual shoes. Variations in weight of hibiscus wood active carbon are 25 phr, 30 phr, 35 phr; and those in vulcanization time are 10 minutes and 15 minutes. Phr of hibiscus wood active carbon as a filler and vulcanization time significantly affects the physical properties of outsole compound on tensile strength, tear resistance, abrassion resistance, and bend-cracking resistance. The best formula is the P3W2 (the weight of hibiscus wood active carbon is 35 phr and the vulcanization time is 15 minutes), equal to the raw formula of outsole compound and complies the SNI 0778:2009 with the physical properties of outsole compounds on tensile strength 82,76 kg/cm2, tear resistance 48,75 kg/cm2, abrassion resistance 201,59 DIN/mm3 , and bend-cracking resistance which is not crack for 150.000 times deflection.
KAJIAN TEKNOLOGI IRADIASI BERKAS ELEKTRON PADA LIMBAH CAIR PRA PENYAMAKAN KULIT MENJADI PUPUK ORGANIK CAIR Cahya Widiyati; Herry Poernomo
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 16 No 1 (2017): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

Technology study of electron beam irradiation on the liquid waste of pre tanning become liquid organic fertilizer has been done. Objective of this study is to obtain manufacture method of electron beam irradiation on the liquid waste of pre tanning become liquid organic fertilizer. Process of irradiation on the liquid waste of pre tanning is for detoxification of H2S, disinfection of bacteria pathogen, and decomposition of organic compound (protein) so that ratio of C/N less 30. Result of study shows that smaller air gap (tu) or distance of window to surface of liquid waste film of pre tanning above belt conveyor showing that production capacity of liquid waste after irradiation even greater. At process conditions: e-beam energy E = 0.3 MeV, e-beam current I = 20 mA, tu = 5 cm, and absorbed dose D = 100 kGy it is obtained production capacity of liquid waste after irradiation m = 543.8941 ton/year. At the same condition with E going up to 1.5 MeV, it is obtained that m = 2,886.2444 ton/year. Liquid waste of pre tanning from irradiation result contains macro nutrition that can be used as raw material on the manufacture of liquid organic fertilizer by method of aerobe fermentation using effective microorganism.
OPTIMALISASI KEBIJAKAN PEMBANGUNAN TENAGA KERJA INDUSTRI KULIT MELALUI PENDIDIKAN VOKASI INDUSTRI Risang Pujiyanto
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 16 No 1 (2017): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

The National Industrial Development Master Plan 2015-2035 states that the availability of competent workforce is one of the most influential things in national industrial development. Vocational education is one of the solutions to create a workforce that suits the needs of the industry. The problems that occur are how the labour policy and industrial labor policy in Indonesia and how to optimize the policy development of industrial workers at Polytechnic of ATK Yogyakarta. This research is normative law research, with statute approach. The results show that both the Major Labour Law and the Industrial Law, regulate the increase of the competence of the workforce. In relation to the development of leather industry workers at Polytechnic of ATK Yogyakarta, various policies such as National Higher Education Standards, Indonesia National Qualification Framework, Indonesian National Working Competency Standards, Profession Certification, Student-Based Learning can support the creation of competent leather industry workforce. By optimizing the policy, it is expected that competent leather industry workers can be created to support the development of national industry.
KAJIAN PEWARNA SECANG LIMBAH CAIR PEWARNAAN KULIT TERSAMAK TERHADAP UJI TOKSISITAS AKUT BENIH IKAN MAS (Cyprinus carpio L) Entin Darmawati; Sudarmadji Sudarmadji; Umar Santoso
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 16 No 1 (2017): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

The Research aims to know the exposure and acute 96-hour toxicity test of dye liquid waste (natural and synthetic) on chrom leather from sheep and cow crust towards goldfish seed. The materials used are dye liquid waste of secang (fermented and dried treatment) and synthetic (Acid Dyestuff); and goldfish seed (Cyprinus carpio L). The research has been done in 3 (three) phases: (1) Acclimatization, (2) Acute Toxicity Test LC50-96h, and (3) Probit Analysis Calculation. The data collected were the number of death of tested fish within 96 hours and then analyzed by using probit method (Probit Analysis). The result of the research shows that there are differences of toxic effects of liquid waste from secang and synthetic dyes. Secang dye has lower toxic effect category (slope value = 4.0, LC50-96hour=29.51%), with upper threshold value (N) of 32.0%. In lower threshold value (n) of 28.0% of this concentration, 50% animals tested died. Synthetic dyes had high toxic effect categories (slope value = 11,36, LC50-96hour =1.44%), with upper threshold value (N) of 4.0%. In lower threshold value (n) of 1.5.0% at this concentration tested animals, i.e. goldfish seed (Cyprinus carpio L), experienced 50% mortality on acute toxicity test (LC50 -96 hours). It can be concluded that secang dye is more environmentally friendly than synthetic ones, so it can be used as an alternative in the process of dyeing in the leather industry.
REVIEW KERATINASE R. L. M. Satrio Ari Wibowo; Zaenal Bachruddin; Nanung Agus Fitrianto; Tomoyuki Nakagawa; Takashi Hayakawa; Ambar Pertiwiningrum
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 16 No 1 (2017): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

Proteolytic enzyme, which is able to hydrolyze keratin efficiently, is called keratinase, produced by microorganisms including fungi, bacteria and actinomycetes, and considered useful for various biotechnological approaches to waste management. Keratin is a fibrous, structural and insoluble protein, and it has high stability. Keratin is one of the main components for cell cytoskeleton, including hair and wool. Hair is difficult to degrade because it contains a lot of keratin with dense polypeptide structure, which is tightly bound by several hydrogen bonds, hydrophobic interactions, and cross-linkage of protein chain with cystine bridge. This condition makes hair have mechanical stability and resistant against degradation of proteolytic enzymes, such as pepsin, trypsin, and papain. Keratin has great strength, but it is not accumulated in nature because it can be hydrolyzed by several keratinolytic microbes. Keratinase enzyme is a part of alkaline protease group, which is active in alkaline condition. Several keratinolytic bacteria produce keratinase enzyme which remains active at pH 8 to 13. The activity of keratinase enzyme also greatly varies by temperature. Keratinase enzyme has stable activity at 20 to 70oC. Enzyme is protein which has catalytic activity and has certain molecular weight. Keratinase enzyme mostly has molecular weight which is less than 85 kDa. Enzymatic hair removal process can be used as an alternative to avoide problems caused by using sodium sulfide in tannery. The benefit of enzymatic hair removal process is perfect hair removal, so that the skin is clean and smooth; removed hair is intact; and sodium sulfide usage is minimized. Keratinase enzyme specifically degrades keratin without damaging other structural proteins, such as collagen, so it has high potential for leather industry.
PEMBUATAN LEM DARI KOMPON KARET ALAM UNTUK PEREKATAN BAHAN KULIT ATASAN SEPATU DAN BAHAN KARET Suharyanto Suharyanto
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 16 No 1 (2017): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

Gluing method is a method to merge leather upper with rubber materials using Shear method by gluing the material to one another in the opposite direction with compound adhesive. This research aims to get compound adhesive to glue leather upper and rubber material. Gluing factors include time, temperature, pressure, type of glue, and glued materials. Methods would ultimately determine the strong adhesion between the leather upper and rubber materials. Formula of rubber compound adhesive consists of natural rubber added with additive materials such as activator, accelerator, plasticizers, fillers, glue and sulfur vulcanizator, and then milled using two-roll mill to be a rubber compound, a solid brown color. Manufacture of compound adhesive with 100 grams of rubber, added with 70 grams petroleum solvent, for 24 hours. The next process is smearing leather upper in 8, 10, 12, 11, 14, and 16 minutes, with the highest test results of drying time is 16 minutes with the strong adhesion of 268.04 N. The strongest adhesion between leather upper and rubber material reach the highest drying time of 12 minutes with the strong adhesion of 149.06 N. In conclusion, adhesion between leather and leather are stronger than leather and rubber materials using Shear Test.
PENGARUH SUHU DAN TEKANAN INJEKSI TERHADAP CACAT SHORT SHOT PRODUK POLIKARBONAT PADA MESIN INJECTION MOLDING Ega Holiyan Meilia Langga; M. Wahyu Sya'bani; R. B. Seno Wulung
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 16 No 2 (2017): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

Nowadays, the application of the plastic covers a lot of aspects in the human activities, including on the leather products industry. The most common plastic producing processes used is injection molding. One of the plastics production primary problems in injection molding is short shots defect. The defect occurs because the melting plastic did not fulfill completely the mold cavity since the process parameters are not optimum. In This study analyzes the effect of the injection pressure and temperature on the short shots defect that occurs at polycarbonates production. The injection pressures and temperatures are varied, but keep the other process parameters at certain value. The result shows that at the constant temperature of 260oC, higher injection pressure would give lower defects for pressure range from 3 to 24 MPa. At 6 MPa the defects reach zero. When using various temperatures from 195 to 280oC at constant pressure of 3 MPa, the results shows that higher temperature would gives lower short shot defect.
PENGENDALIAN BAHAN BAKU KULIT WET BLUE SAPI UNTUK PRODUKSI KULIT UPPER DI PT KARUNIA CATUR PERKASA MALANG Chasbiyatur Rozalia; R. B. Seno Wulung; Yuli Suwarno
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 16 No 2 (2017): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

Storage of raw materials of wet blue is uncontrolled because the amount of raw material stored exceeds the capacity of the storage space. This also causes the handling of wet blue in the storage space is not optimum so that the wet blue has encountered defects, dry, fungus and bacteria and salt stain. The purpose of this research is to improve the process of storage of wet blue for the production of leather upper as the first step to support the production of leathers with good quality. Wet blue storage technique is improved by descriptive analysis with library studies related to the physical and chemical characteristics of wet blue and the environmental effects of wet blue during storage. Storage techniques are supported by efficient planning and ordering mechanisms of raw materials and according to production needs and storage space capacity. Material Requirement Planning (MRP) or proper raw material planning can determine the order of raw materials and the amount of efficient inventory. Storage space with a capacity of 18.000 sides is only filled with a capacity of ± 10.000 sides. Optimization of storage space with efficient layout can be allocated to provide space for raw material selection in storage space.
PENERAPAN PEWARNA INDIGO DARI DAUN INDIGOFERA L PADA KULIT CRUST SUEDE DOMBA DENGAN TEKNIK IKAT MOTIF JUMPUTAN Entin Darmawati; Sudarmadji Sudarmadji; Umar Santoso
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 16 No 2 (2017): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

This study aims to absorb the blue Indigo dye on the skin of sheep crust suede with the technique of binding in order to produce a jumputan motif on tanned skin. Materials used were Indigo leaves (Indigofera L) and tanned leather from sheep crust suede. This research used experimental method with 3 (three) stages: (1) Making blue Indigo dye by enzyme hydrolysis process, (2) Creation of tanned leather motif with binding technique and (3) Application of blue Indigo dye on sheep crust suede using dyeing method with variations: (a) concentrations (6%; 12% and 18%); (b) dyeing time (1.5 hours, 2 hours); (c) bonding techniques (single, double and cross towards color fastness on jumputan motif pattern). The results of the color fastness were the value of 5/4, meaning good, no color changes to the original one at concentrations of 12% and 18%, time 2 hours, double bond motifs, and the value of 4/3, meaning good enough with a little faded at concentration of 6%, 2 hour time, double bond motif, and the most optimum absorption (82%) on the sheepskin's croupon. It can be concluded that the indigo dye gives blue color which can be applied to sheep crust suede with binding technique of jumputan method to produce unique and exclusive motif as raw material of leather product or craft.
Pengaruh Mutu Proses Stockfit Terhadap Hasil Uji Bonding Bottom Sepatu Running dengan Metode Cementing di Perusahaan Sepatu Olah Raga Karawang-Jawa Barat Vivi Winda Sari; Diana Ross Arief; Cahya Widiyati
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 16 No 2 (2017): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

Quality control is conducted to minimize the reject of production. Quality of bottom is one of the important factors in making shoes. The bottom quality standards are determined based on the strength of glue adhesion between the components. The study was held at one of sport shoe companies from 13th March to 13th April 2017 with the purpose to reveal the quality control of the stockfit process to the test results of running shoes bonding bottom with cementing method. The stockfit process consists of few steps, for instance outsole buffing, outsole trimming, setting bottom, primering, cementing, attaching, pressing, press pong-pong, and cooling. Finished products were tested in the laboratory by random sampling. The quality control of running-shoe bottom stockfit process uses Plan-Do-Check-Action (PDCA) method in each process and is continued by analyzing the result of bonding test by adapting quality control tools. The result of the analysis shows the cause of failure of bonding or reject due to less perfect glue adhesiveness between midsole / outsole by 71,11%, midsole / midsole2 3,33%, midsole1,2 / gel outside 3,33%, midsole1,3 / gel heel back of 18.89%, and midsole/shank is 3.33%. Quality control at this company has been well implemented.

Page 2 of 18 | Total Record : 174

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