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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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KARAKTER FISIK KULIT DOMBA SAMAK KOMBINASI DENGAN BAHAN PENYAMAK ALUMUNIUM-MIMOSA Swatika Juhana; Tutik Maryati; Wahyu Fajar Winata
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 19 No 1 (2020): BERKALA PENELITIAN TEKNOLOGI KULIT, SEPATU DAN PRODUK KULIT
Publisher : Politeknik ATK Yogyakarta

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Abstract

Sheep skin tanning has been carried out using a combination tanning material, namely 4% Aluminum and 6% Mimosa. Raw materials in the form of raw sheep skin weighing 2 kg. BHO, tanning, and post tanning processes are carried out to produce crust skin. The physical test characteristics are 0.7 mm thickness, 6 mm softness, 27.8 N/mm2 transverse tensile strength, 17.8 N/mm2 longitudinal tensile strength, 48.5 % transverse elongation, 45.8 % longitudinal elongation, 19.1 N/mm2 transverse tear strength, 18.9 N/mm2 longitudinal tear strength, and shrinkage temperature (Ts) 89oC. The physical test results were compared with the SNI 4593-2011 standard for sheep leather jackets. The results meet the SNI for sheep leather jackets.
STUDI SURFACE COATING DAN KARAKTER FISIS LAPIS TIPIS NANO PARTIKEL TiO2 PADA KULIT FINISH Prasetyo Hermawan; Swatika Juhana
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 19 No 1 (2020): BERKALA PENELITIAN TEKNOLOGI KULIT, SEPATU DAN PRODUK KULIT
Publisher : Politeknik ATK Yogyakarta

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Abstract

Influence of variation; type of film material, number of film layers and concentration of TiO2. The purpose of this research was to study of variations; type of film materials, number of film layers and concentration of TiO2 on goat skin finish. The variation in the number of layers are; 0, 1, 2 and 3 layers, while variations in the concentration of TiO2 are; 0%, 0.5%, 1%, 1.5% and 2%. Films are made using polymers from water soluble nitrocellulose (NC-W), water soluble polyurethane (PU-W) and thinner soluble polyurethane (PU-T). Furthermore, testing of the physical characteristics of the skin includes; weight, thickness, softness, hardness and contact angle. In the variation of the number of film layers from zero to three layers, the largest increase in skin weight occurred in the use of PU-T, namely 0.47 gr and the smallest in NC-W of 0.28 gr. The increase in thickness also occurred at P-UT, which was 43.60 µm and the lowest at PU-W was 15.66 µm. The largest decrease in skin softness occurred in PU-T from 1.88mm to 1.40 mm (down 0.48 mm) and the smallest in PU-W, which was down by 0.06mm. The hardness of the skin layer using PU-T increased from 88.66HA to 95.50HA (up 6.84 HA) and the lowest in PU-W increased by 5.5HA. The change in the contact angle of the leather surface for PU-T decrease from 770 to 490 (down 280) and the lowest for PU-W from 800 to 630 (down 170). In the variation of TiO2 concentration from 0% to 2%, the largest increase in skin weight occurred in PU-T, namely 0.13 gr and the smallest in PU-W of 0.07 gr. The change in contact angle at the variation of TiO2 concentration was not significant, the mean value of the contact angle for; NC-W, PU-W and PU-T are; 61.00, 62.20 and 58.40.
STUDI PERBAIKAN FORMULASI DYESTUFF PADA MIXING COLOR SEBAGAI ALTERNATIF PERBAIKAN KERATAAN WARNA PADA PEWARNAAN DASAR (DYEING) KULIT DOMBA GREEN CABRETTA Helis Rianti; Elis Nurbalia; Prasetyo Hermawan
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 19 No 1 (2020): BERKALA PENELITIAN TEKNOLOGI KULIT, SEPATU DAN PRODUK KULIT
Publisher : Politeknik ATK Yogyakarta

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Abstract

The aim of this study was to find a solution to the problem of the dyeing process of Sheep Cabretta Glove skin that experiences uneven color. One of the causes of uneven color is based on the use of different types of dyestuffs. In changing the formulation of dyeing, the focus is on replacing similar dyestuffs with acid dyes or metal complex dyes. The expected result is that the mixing of the two colors will be more optimal and the color on the skin is evenly distributed. The factors that influence the basic coloring process are pH, temperature, time, and IEP (Iso Electric Point). The raw material used is quality I - IV / V TBL of sheep crust, with shaving thickness of 0.5 - 0.55 mm, and the number of 5 sheets or 16.54 sqft with a weight of 1200 gr. While the auxiliary materials used in the dyeing processed are , Inoderme Green CJR (metal complex dyes), Coriacide Yellow 3JN (acid dyes), Ammonia, Synectan LB. The stages of the processed carried out are wetting back, retanning, fixation, dyeing, fatliquoring, shaving, and Top Fat. The method used are of observation, interviews, direct work practice, and literature study. The dyeing process method used for making sheep Cabretta glove articles is a through dyeing method. The expected results are uniform color leather by mixing similar dyestuffs, namely acid dyes or metal complex dyes and the skin obtained is green, according to organoleptic views it is not in accordance with customer standards, So that a literature study was carried out to change the dye formulation by using acid dyes, namely Coriacide Yellow 3JN with Coriacide Green BS or Coriacide Dark Green JT dyes and metal complex dyes namely Inoderme Green CJR with Inoderm Yellow JS or Melioderm HF Yellow R dyes which are expected to increase the uniform of color on the skin surface.
STUDI PENGARUH PENGGUNAAN ASAM SULFAT PADA PEMBUATAN REDUCED CHROME TANNING AGENT SERTA KARAKTERISASINYA Prasetyo Hermawan; Swatika Juhana
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 19 No 1 (2020): BERKALA PENELITIAN TEKNOLOGI KULIT, SEPATU DAN PRODUK KULIT
Publisher : Politeknik ATK Yogyakarta

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Abstract

The purpose of this research was to study the effect of the weight of using H2SO4 in the manufacture of reduced chrome tanning agent. The raw materials used are salt Na2Cr2O7, molasses and H2SO4 and control is needed when adding molasses and H2SO4 because the reaction is exothermic. Reduced chromium liquid is made by varying the weight of using H2SO4; 15.5gr, 16.6gr, 18.2gr, 20gr and 26.6gr. Furthermore, the character of the reduced chromium material is tested, including using the standard SNI: 06-4993-1999 testing related to the basicity value test. The added weight of using H2SO4 at all levels of variation when producing reduced chrome yields a dark green color of the reduced chromium liquid product. In addition to the weight of using H2SO4 from 15.5 gr to 26.6 gr, there was a decrease in the basicity value from 65.91% to 0%, a decrease in the pH value from 2.83 to 1.01 and also a decrease in water content from 45.28% to 36.92%. In addition, the weight of H2SO4 was used as much as 18.2 gr, 20 gr and 26,6 gr, then by using the spectophotometric method, the average Cr (IV) concentration was obtained at 44.4 mg/L and Cr (III) was 331.9 mg/L. The weight of H2SO4 used from 18.2gr to 26.6gr decreased the yield from 91.9% to 84.01%.
STUDI PEMANFAATAN GAS BUANG KNALPOT (FLUE GAS) SEBAGAI DELIMING AGENT ALTERNATIF PADA PENGOLAHAN KULIT KAMBING Prasetyo Hermawan; Alfani Risman Nugroho
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 19 No 1 (2020): BERKALA PENELITIAN TEKNOLOGI KULIT, SEPATU DAN PRODUK KULIT
Publisher : Politeknik ATK Yogyakarta

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Abstract

ABSTRACT The purpose of this research was to study the process of removing lime from the skin by flowing flue gas into a solution of lime in a reactor consisting of an absorption reactor and a deliming reactor. CO2 gas which is part of the flue gas will react with the Ca(OH)2 suspension so that the pH of the lime liquid and the pH of the skin will decrease and in this study three types of motorbikes are used as a source of flue gas. The results showed that flue gas flowing in lime solution for 30 minutes resulted in a relatively constant pH of lime. The exhaust gas from motor 2 (flow rate of 6.4 liters / minute) which is flowed in the reactor has been able to reduce the pH of the lime solution from 12.60 to 7.77 (decreased by 4.49 pH units). The use of CO2 can only reduce the pH of water from 8.14 to 7.57 (decreased by 0.57 pH units). In the implementation of the variation in the height of the absorption column, the optimal value for the column height is 100 cm and is able to reduce the pH of water from 12.26 to 7.14 (decrease by 5.12 pH units). In the experiment, the addition of skin in a stirred reactor caused the ability to decrease the pH of the liquid and skin to be reduced, the pH of the lime solution was still 8.33 in the first 30 minutes and the pH stability only occurred at 45 minutes. The character of the deliming skin was also compared with the deliming method using (NH4)2SO4
SOFTNESS TEST ST 300 SEBAGAI ALAT UJI KELEMASAN KULIT TERSAMAK PADA LABORATORIUM PENGUJIAN FISIS POLITEKNIK ATK eko nuraini; Muhammad Ikhwan
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 19 No 1 (2020): BERKALA PENELITIAN TEKNOLOGI KULIT, SEPATU DAN PRODUK KULIT
Publisher : Politeknik ATK Yogyakarta

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Abstract

The purpose of this research is to understand the working principle or operation of the Softness Leather Test equipment. Operation can use a variety of ring diameter variations in the test parameters. The test method in this study uses the ISO 17235: 2015 standard in principle of softnes testing, the skin is placed exactly in the position of the standard ring used, the lever is pressed at a certain speed on the skin area so that pressure arises which will produce a softness value of the sample. Tests used a ring diameter (ɸ) of 20 mm and 25 mm. Samples of working glove, Chrome tanned goat skin and vegetable tanned lining goat skin. Tests were carried out on the croupon area and body parts with three treatments, the test results data were average. The results obtained for the croupon area of ​​lining goat skin with ring diameter (ɸ) 20 mm, the thickness of the sample was 0.81, 1.8; diameter (ɸ) 25 mm is 2.16. The body part uses a ring diameter (ɸ) of 20 mm with a thickness of 0.84 of 1.66 and a diameter (ɸ) of 25 mm of 2.08. Samples of goat skin working glove tan Krom ring diameter (ɸ) 20 mm thickness of sample 0.63 parts of Croupon 4.7: ring diameter (ɸ) 25 mm was 5.6. The part of the ring body with a diameter (ɸ) of 20 mm with a thickness of 0.68 is 4.5; ring diameter (ɸ) 25 mm of 5.4. The skin with a higher thickness will give a smaller value to the softness leather test. The conclusion is that the raw material, production process, sample thickness, ring diameter, location of sample points have an effect on the results
PENGARUH PENAMBAHAN KONSENTRASI MINYAK PADA PROSES FATLIQUORING TERHADAP PENINGKATAN KELEMASAN KULIT ARTIKEL GOAT BATTING PEARL WHITE EMBOSS Zulfa Ashari; Elis Nurbalia; Hermawan Prasetyo
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 20 No 1 (2021): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

The purpose this final project to explain the increase in skin elasticity of goat batting pearl white emboss with the addition of the concentration of oil used in the fatliquoring process. This research was carried out from February to March 2021. The material used in this study was 25 pieces of wet blue goat skin with an area of ​​140 sqft and a weight of 20 Kg. The auxiliary materials used in the fatliquoring process are Pellan 802, Lipoderm Liquor SAF, and Peramit MLN. The results of the initial formulation showed that the skin with slackness was still not up to standard, so the reformulation was added to the percentage of concentration used was 4% Pellan 802, 2% Lipoderm Liquor SAF, and 0.25% Peramit MLN to increase skin slackness in goat batting pearl white embossed. Based on the results of the physical test for the softness test before reformulation the results were 4.4 mm and for the skin after reformulation the results were 5.8 mm. In addition, the tensile strength, elongation and tear strength of goat batting pearl white embossed skin also increased, indicating that the reformulation in the fatliquoring process succeeded in increasing the slackness of goat batting pearl white embossed skin.
ANALISIS DAN EVALUASI IMPLEMENTASI TEACHING FACTORY DI POLITEKNIK ATK YOGYAKARTA Sofwan Siddiq Abdullah
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 20 No 1 (2021): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

Penelitian ini bertujuan untuk melakukan evaluasi dan analisis hasil penilaian implementasi Teaching factory menggunakan 7 (tujuh) assessment parameter dan mengetahui level jobsheet guna meningkatkan level jobsheet di Politeknik ATK. Assesment yang digunakan adalah 7 (tujuh) assessment parameter dalam implementasi Teaching factory dan 7x7 Teaching factory Matrix. Data primer dalam penelitian ini berupa wawancara dan data autentik di Politeknik ATK. Teknik wawancara dilakukan langsung kepada Direktur, Pembantu Direktur, Kepala Teaching factory Politeknik ATK, Kepala program studi Teknologi Pengolahan Kulit (TPK) yang merupakan key informan kebijakan Politeknik ATK terkait Teaching factory . Lingkup penelitian mengenai implementasi Teaching factory program studi TPK. Hasil penilaian mendapatkan skor 60 untuk manajemen Teaching factory , bengkel-laboratorium 64, pola pembelajaran–training 57,14, parameter marketing-promosi Teaching factory dengan nilai 48. Nilai 52 untuk aspek produk–jasa, 64 untuk sdm pengelola Teaching factory dan hubungan industri dengan nilai 70. Hasil perhitungan 7x7 Matrix Teaching factory Prodi TPK adalah 2,893. Hal ini menunjukkan peningkatan capaian dibandingkan 2 tahun sebelumnya yaitu 2,786. Implementasi Teaching factory di Politeknik ATK sudah semakin mendekati level 3 dengan titik berat pembelajaran tahap kualitas. Salah satu prioritas utama yang perlu diperhatikan dan ditingkatkan adalah aspek Marketing- Promosi Teaching factory . Parameter ini memiliki nilai 48. Nilai yang menunjukkan capaian terendah diantara 7 (tujuh) parameter dalam implementasi Teaching factory .
PEMANFAATAN LIMBAH FLESHING SAPI MENJADI GELATIN DENGAN METODE HIDROLISIS KOLAGEN Aulia Umami; Swatika Juhana; Wahyu Fajar Winata
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 20 No 1 (2021): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

Industri penyamakan kulit merupakan salah satu industri yang menghasilkan limbah padat. Limbah padat dari industri penyamakan kulit dapat berupa bulu, sisa-sisa daging, potongan kulit dan juga bahan proses seperti garam. Penelitian ini dilakukan untuk memanfaatkan limbah padat fleshing kulit sapi menjadi gelatin. Pembuatan gelatin ini menggunakan metode hidrolisis kolagen. Limbah fleshing sebanyak 200 gram yang dihidrolisis dengan 300% asam asetat 9% selama 3 hari, dinetralkan, diekstraksi dengan air panas suhu 60-65 ℃ selama 4 jam, dipekatkan dan dikeringkan. Hasil penelitian diperoleh gelatin dengan rendemen 0,33%, kadar protein 95,18%, dan memiliki kualitas yang baik. Sehingga dapat disimpulkan bahwa limbah fleshing mengandung kolagen dan dapat diolah menjadi gelatin.
PENERAPAN TEKNIK ECOPRINT PEWARNA DAUN JATI PADA KULIT TERSAMAK TERHADAP KETAJAMAN WARNA DAN KETAHANAN LUNTUR Entien Darmawati; Sutopo
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 20 No 1 (2021): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

Penelitian ini bertujuan penerapan teknik ecoprint daun jati (Tectona grandis L.) untuk pewarnaan (Dyes) dengan cara mentrasfer warna motif daun pada kulit tersamak crust domba melalui kontak langsung, terhadap ketajaman warna dan ketahanan luntur. Bahan yang digunakan daun jati dan kulit tersamak crust domba. Penelitian eksperimen teknik ecoprint ini dilakukan 3 tahapan yaitu: : (1) Identifikasi sifat dan karakteristik zat pewarna daun jati dan kulit crust domba; (2) Penerapan teknik ecoprint variasi : (a) Jenis warna daun jati (merah; hijau); (b) Kulit crust domba (bagian nerf; flesh); (c) Metode ecoprint (ecosteam; ecodyeing); (d) Suhu (<30 oC; 40-60 oC, 70-80 oC, 90-100 oC dan >100 oC); (e) waktu proses ( 0,5; 1; 1,5; 2; dan 2,5 jam); dan (3) Pengujian fisis (ketajaman warna dan Ketahanan luntur). Analisis data hasil penelitian menggunakan ANOVA. Hasil penelitian didapatkan sifat karakteristik pewarna daun jati mengandung pigmen chlorophyl dan pigmen flavonoid (merah-ungu), Sifat karakteristik kulit tersamak crust domba (kelemasan tinggi, tahan terhadap panas tinggi, dan mudah diproses pewarnaan, karena mempunyai sifat-sifat kimia dan fisis). Hasil pengujian ketajaman warna (arah warna merah-violet-coklat, kerataan warna baik dan motif sesuai aslinya). Hasil uji ketahanan luntur warna terhadap gosokan basah ecoprint kulit domba dengan metode ecosteam dan ecodyeing pada suhu 70-80 oC dan waktu 1,5 jam, dengan nilai 3,5 dan 4 artinya cukup baik, dan hasil uji ketahanan luntur terhadap gosokan kering , rata-rata baik dengan nilai 4 dan 4-5. Disimpulkan bahwa daun jati dapat dimanfaatkan untuk pewarnaan kulit crust domba dengan Teknik ecoprint.

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