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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 5 Documents
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Search results for , issue "Vol 16 No 1 (2017): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit" : 5 Documents clear
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.

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