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All Journal Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
R.L.M.S. Ari Wibowo
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Arts Chemical Engineering, Chemistry & Bioengineering Engineering Industrial & Manufacturing Engineering Social Sciences

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PENGARUH PENAMBAHAN PHENOL FORMALDEHID TERMODIFIKASI NATRIUM SILIKAT TERHADAP LEM SEPATU BERBASIS KARET M.W. Syabani; Indri Hermiyati; R.L.M.S. Ari Wibowo
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 13 No 2 (2014): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

This research aim are to studying adhesion characteristic of shoes adhesive, ie viscosity, tack and peel strenght. Shoes adhesive made from natural rubber and synthetic rubber (SBR) with toluene as the solven. SRB composition in the mix are 0, 20, 40, 60, 80 and 100% weight. Three variation of phenol formadehyde composition are 40, 80 and 120 per hundred parts of rubber (phr). The results show us that the viscosity lower as the % SBR added is higher, and the loop tack has the highest value at 20% SBR added. The peel tack has highest value at 60% SBR added for three peel test model, except on the control sample. For every same % SBR composition, adhesive sample that has 40 phr phenol formaldehyde composition, gives higher loop tack and peel strenght value. We can conclude from this results that adhesive with 40% phenol formaldehyde composition will give optimum wettability from adhesive to substrat.
RETANNING EFFECT ON WATER REPELLENCY OF UPHOLSTERY LEATHER Irieka Widiya Permata; Mustafidah Udkhiyati; R.L.M.S. Ari Wibowo
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 23 No 1 (2024): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

Water repellent properties in upholstery leather is required to increase its durability. In this study, the effect of various retanning materials to the water repellent properties of upholstery leather is identified. The raw material used is IV quality of wet blue cow leather. The treatment is divided into 3 formulas, they are control using vegetable retanning materials such as mimosa, chestnut and tara; treatment 1 using vegetable (mimosa and chestnut), syntan tanning agent (white syntan/Basyntan DLE) and melamine resin (Eurosintan M)); and treatment 2 using syntan (white syntan/Basyntan DLE and softening syntan/Sertan BSF) and resin (melamine resin/Eurosintan M and acrylic resin/Retingan R7). Water absorption, tensile strength and elongation is carried out to test the effect. Based on the test results, it is showed that the treatment 2 produces upholstery leather with the highest water repellent properties with a water absorption test result of 24.75%. The results of the tensile strength and elongation tests produced in treatment 2 also complied with SNI 06-0779-1989 with values of 239.59 kg/cm2 and 75.27%, respectively.
Co-Authors Indri Hermiyati Irieka Widiya Permata Muh. Wahyu Syabani Mustafidah Udkhiyati