Majalah Kulit, Karet, dan Plastik最新文献

Karakteristik fisis bioplastik yang dibuat dari kombinasi pati tapioka dan kasein susu apkir 木薯淀粉贴片和阿普基尔牛奶酪蛋白组合制成的生物塑料物理特性

Majalah Kulit, Karet, dan Plastik Pub Date : 2021-12-30 DOI: 10.20543/mkkp.v37i2.7422

Ariya Dwi Nugrahanto, A. Kurniawati, Yuny Erwanto

{"title":"Karakteristik fisis bioplastik yang dibuat dari kombinasi pati tapioka dan kasein susu apkir","authors":"Ariya Dwi Nugrahanto, A. Kurniawati, Yuny Erwanto","doi":"10.20543/mkkp.v37i2.7422","DOIUrl":"https://doi.org/10.20543/mkkp.v37i2.7422","url":null,"abstract":"This study aimed to develop bioplastic from a combination of tapioca starch and casein, as well as to determine the physical characteristics, such as thickness, density, light transmittance, and opacity. The composition of the bioplastic was made from two types of casein, namely commercial casein and rejected milk casein, with a ratio of tapioca starch and casein consisting of 4 treatment groups (4:0, 3:1, 2.5:1.5, 2:2). Each treatment was repeated 6 times. The physical characteristics data obtained were analyzed using a two-way ANOVA completely randomized design variance analysis. If there is a difference, it is continued with the Duncan multiple range test (DMRT). The results showed that the ratio of starch and casein had a very significant effect on all test parameters (P<0.01). An increase in commercial casein (CC) and rejected milk casein (EMC) increased thickness and opacity, while density and light transmittance decreased. Based on the research, bioplastic can be made with a combination of different ratios of tapioca starch and casein types with the best result were at a ratio of 2:2 which produced a thickness of 0.29 mm, light transmittance of 20.03%, opacity of 2.51%, while the density had the smallest value at 0.15 gr/cm3. In conclusion, rejected milk casein could be used as biomaterial to make bioplastic combined with tapioca starch.","PeriodicalId":18167,"journal":{"name":"Majalah Kulit, Karet, dan Plastik","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45947003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The use of epoxidized natural rubber for producing rubber seals of LPG tube valves 环氧化天然橡胶在LPG管阀橡胶密封件生产中的应用

Majalah Kulit, Karet, dan Plastik Pub Date : 2021-12-30 DOI: 10.20543/mkkp.v37i2.6775

H. Handayani, M. I. Fathurrohman, N. A. Kinasih, A. F. Falaah

{"title":"The use of epoxidized natural rubber for producing rubber seals of LPG tube valves","authors":"H. Handayani, M. I. Fathurrohman, N. A. Kinasih, A. F. Falaah","doi":"10.20543/mkkp.v37i2.6775","DOIUrl":"https://doi.org/10.20543/mkkp.v37i2.6775","url":null,"abstract":"Rubber seal of Liquified Petroleum Gas (LPG) tube valves should fulfill Indonesian National Standard (SNI 7655:2010), which has high n-pentane resistance properties. This study aimed to design a rubber seal compound based on epoxidized natural rubber which fulfill SNI 7655:2010 requirements. The formulation of compound were designed by using epoxidized natural rubber with varied levels of epoxidation. Epoxidation reaction was occurred in an epoxidation reactor at 70 oC for 6 hours with 0.75 mole/mole isoprene unit of hydrogen peroxide and 0.4 mole/mole isoprene unit of formic acid. Mechanical properties, ageing properties, and swelling performance in n-pentane of the modified natural rubber were tested and the result compared to the minimum requirement of SNI 7655:2010. The result showed that the increasing in epoxidation level made natural rubber becomes more polar so it is more resistant to immersion in n-pentane. Epoxidized natural rubber with levels of 40% and 50% fulfilled specifications for volume change in accordance with the quality requirements in SNI 7655:2010. The use of natural rubber created good elasticity to all level of epoxidized rubber where these properties are needed for rubber seal of LPG tube valve. However, the formulas of compound were less resistant to aging.","PeriodicalId":18167,"journal":{"name":"Majalah Kulit, Karet, dan Plastik","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49605656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-density thermoplastic vulcanizates based on LLDPE/NR for truck ﬂoor mats application 基于LLDPE/NR的高密度热塑性硫化胶，用于卡车地垫

Majalah Kulit, Karet, dan Plastik Pub Date : 2021-12-30 DOI: 10.20543/mkkp.v37i2.7159

D. W. Nurhajati, U. Lestari

引用次数: 0

Korelasi antara sistem vulkanisasi dengan sifat mekanis dan sifat redaman vulkanisat karet butil tanpa pengisi 火山化系统与机械性质和无填充物橡胶丁基硫化特性之间的关系

Majalah Kulit, Karet, dan Plastik Pub Date : 2021-12-30 DOI: 10.20543/mkkp.v37i2.7042

Adi Cifriadi, Asron Ferdian Falaah, Santi Puspitasari

引用次数: 0

EVA/starch/POE composite for footwear material: How the chemical composition affects its properties compared to standards 鞋类材料用EVA/淀粉/POE复合材料:与标准相比，化学成分如何影响其性能

Majalah Kulit, Karet, dan Plastik Pub Date : 2021-12-30 DOI: 10.20543/mkkp.v37i2.7449

U. Lestari, Gunawan Priambodo, D. W. Nurhajati

{"title":"EVA/starch/POE composite for footwear material: How the chemical composition affects its properties compared to standards","authors":"U. Lestari, Gunawan Priambodo, D. W. Nurhajati","doi":"10.20543/mkkp.v37i2.7449","DOIUrl":"https://doi.org/10.20543/mkkp.v37i2.7449","url":null,"abstract":"The usage of biodegradable foam material in footwear components has positive impacts on environmental sustainability when disposed into landfills. This study was aimed to investigate the effects of polyolefin elastomer (POE) on its properties of foamed EVA/cassava starch composites compared to standards. Foamed EVA/cassava starch composites were prepared by mixing EVA, cassava starch, and additives using a two-roll mill laboratory scale. Content of POE was varied 10-20 phr. The ratios of EVA/cassava starch were varied from 90/10; 80/20; 70/30; and 60/40. Effects of POE were characterized its density, tensile properties, tear strength, permanent set, abrasion resistance, flex resistance, morphology, and biodegradability. It was found that the increase of POE content in EVA/ starch composites increased the density and abrassion resistance, but decreased the tensile strength, elongation at break, and permanent set properties. The best formula of foamed EVA/cassava starch/POE composites for footwear materials contains EVA 80 phr, starch 20 phr and POE 20 phr with density 0.983 g/cm3, tensile strength 22.27 kg/ cm2, elongation at break 645.67%, tear strength 9.42 N/mm, volume loss 88.907 mm, no crack when flexed 150 kcs. These results met the requirements of SNI 0778:2009-Sol Karet Cetak for quality classification 3 of outsoles. The foamed composite containing POE20 has denser morphology than POE10, while the addition of POE has no significance in weight loss after burial test.","PeriodicalId":18167,"journal":{"name":"Majalah Kulit, Karet, dan Plastik","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44236475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Natural rubber-based cushion gum compound formulation at various type and dosage of rubber processing oil and tackifier resin 天然橡胶基缓冲胶的复合配方以不同类型和用量的橡胶加工油和增粘剂树脂为主

Majalah Kulit, Karet, dan Plastik Pub Date : 2021-12-30 DOI: 10.20543/mkkp.v37i2.6531

S. Puspitasari, N. A. Kinasih, A. Ramadhan, A. Cifriadi, M. Chalid

{"title":"Natural rubber-based cushion gum compound formulation at various type and dosage of rubber processing oil and tackifier resin","authors":"S. Puspitasari, N. A. Kinasih, A. Ramadhan, A. Cifriadi, M. Chalid","doi":"10.20543/mkkp.v37i2.6531","DOIUrl":"https://doi.org/10.20543/mkkp.v37i2.6531","url":null,"abstract":"Cold retreading technique dominates retreaded tire manufacturing process. The technique applies rubber cushion gum compound as adhesion medium to bond new tread with a worn old tire. High-quality cushion gum compound mainly requires good adhesive strength. Tackiness of the rubber compound can be improved by addition of tackifier resin and rubber processing oil (RPO). The research was aimed to evaluate the performance of various types and dosages of tackifier resin and bio-based RPO to physic-mechanical properties of cushion gum. A method in the manufacture of natural rubber-based cushion gum compound was in accordance with ASTM D3182. Cushion gum rubber compound formula was designed by using bio-based RPO such as pine tar oil at 5 and 12 phr and three types of tackifier resin such as rosin resin, phenolic resin, and hydrocarbon resin at 3 and 7 phr. Petroleumbased RPO and commercial cushion gum were selected as reference material. Curing characteristic and physicmechanical properties test results were used as a reference to determine cushion gum quality. The observation during experiment indicated that natural rubber-based cushion gum compound formulated with addition of 5 phr rosin resin and 5 phr pine tar oil (code ZH4) has the closest curing characteristic and physic-mechanical properties to commercial cushion gum.","PeriodicalId":18167,"journal":{"name":"Majalah Kulit, Karet, dan Plastik","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48722961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Formulasi paduan karet alam/kloroprena dalam rancangan material komposit karet untuk bantalan isolator tahan gempa 天然橡胶/叶氯乙烯合金配方，用于抗震绝缘体复合材料合成材料

Majalah Kulit, Karet, dan Plastik Pub Date : 2021-12-30 DOI: 10.20543/mkkp.v37i2.6944

Adi Cifriadi, Santi Puspitasari, Asron Ferdian Falaah, Usman Wijaya

引用次数: 0

Ekstraksi kolagen dari kulit kerbau menggunakan asam asetat 用乙酸从水牛皮中提取胶原蛋白

Majalah Kulit, Karet, dan Plastik Pub Date : 2021-12-30 DOI: 10.20543/mkkp.v37i2.7025

S. Mulyani, A. Hintono, Neisya Rizki Adefatma, I. F. Pahlawan

引用次数: 1

FTIR-PCA analysis as an initial analysis to distinguish the origin of skin and leather FTIR-PCA分析作为区分皮肤和皮革来源的初步分析

Majalah Kulit, Karet, dan Plastik Pub Date : 2021-07-01 DOI: 10.20543/MKKP.V37I1.6348

R. Yuliatmo, R. L. M. Wibowo, W. Pambudi, Sofwan Siddiq Abdullah, T. R. Hakim, Y. Erwanto

{"title":"FTIR-PCA analysis as an initial analysis to distinguish the origin of skin and leather","authors":"R. Yuliatmo, R. L. M. Wibowo, W. Pambudi, Sofwan Siddiq Abdullah, T. R. Hakim, Y. Erwanto","doi":"10.20543/MKKP.V37I1.6348","DOIUrl":"https://doi.org/10.20543/MKKP.V37I1.6348","url":null,"abstract":"Leather products are parts of daily fashion in Indonesia, such as bags, shoes, jackets, and gloves. Adulteration of raw materials for leather products can occur if there are no labels on these products. Various methods such as PCR, GC-MS, HPLC, and FTIR have been carried out to distinguish the origin of leather products. The FTIR method is known as an easy and inexpensive method to use. The objective of this study was to evaluate the capability of FTIR spectroscopy and Principle Component Analysis (PCA) for lipid identifcation and initial analysis to distinguish the original materials on leather products. Lipid extracts obtained from the various skin were scanned using an FTIR spectrophotometer at 4000–450 cm -1 . It resulted in spectral diﬀerences in several wavenumbers (3000-2800 cm -1 and 1200-1000 cm -1 ). The same result is also found in lipid spectra from leather product extraction. The FTIR spectroscopy and PCA can diﬀerentiate pigskin and goatskin through specifc peaks in infrared spectra. This can be used as an initial analysis on determining the existence of skin adulteration in leather products. This study is prospective to be continued by chemometrics as quantitative analysis.","PeriodicalId":18167,"journal":{"name":"Majalah Kulit, Karet, dan Plastik","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42464539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

The investigation of optimum condition of natural rubber epoxidation reaction in latex phase 天然橡胶在乳胶相中环氧化反应最佳条件的探讨

Majalah Kulit, Karet, dan Plastik Pub Date : 2021-07-01 DOI: 10.20543/MKKP.V37I1.6069

N. A. Kinasih, H. Handayani, M. I. Fathurrohman, A. F. Falaah

{"title":"The investigation of optimum condition of natural rubber epoxidation reaction in latex phase","authors":"N. A. Kinasih, H. Handayani, M. I. Fathurrohman, A. F. Falaah","doi":"10.20543/MKKP.V37I1.6069","DOIUrl":"https://doi.org/10.20543/MKKP.V37I1.6069","url":null,"abstract":"Natural rubber (NR) latex epoxidation is a chemical modifcation of natural rubber to produce natural rubber with higher polarity (oil resistant) which is commonly called epoxidized natural rubber (ENR). ENR is produced from the reaction of natural rubber latex with performic acid. Performic acid is formed from in situ reaction between formic acid and hydrogen peroxide. During epoxidation process, the carboxyl group of natural rubber is converted into epoxy group and various side reaction products such as carbonyl, hydroxyl, and hydro furan. These side products must be minimalized to optimize the epoxy level. The epoxidation reaction was carried out at 70 ° C for 6 hours using 2 types of latex: fresh latex (FL) and concentrated latex (CL). The addition of reactant was varied in two ways: dropwise (coded “1”) and poured all at once (coded “2”). The epoxy product and rate constant (k) were analyzed to obtain optimum reaction condition. The epoxy and side reaction content were determined by Attenuated Resonance Fourier Transform Infrared (ATR-FTIR). The slope of epoxy-time plotting curve was determined as ENR rate constant (k). The optimum NR epoxidation reaction was achieved in CL2, which exhibited lowest value of side reaction and highest value of k (2.8082x10 -5 L mol -1 sec -1 ).","PeriodicalId":18167,"journal":{"name":"Majalah Kulit, Karet, dan Plastik","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46411651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0