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All Journal Jurnal Teknik Kimia USU G-Tech : Jurnal Teknologi Terapan Jurnal Teknik Kimia USU
Wedian, Ariya
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Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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Effect of Pigment Concentration on Visual and Performance Quality of TPU Resin in Injection Molding Wulansari, Isma; Bestari, Bella; Wedian, Ariya; Wulandary, Debby
G-Tech: Jurnal Teknologi Terapan Vol 9 No 3 (2025): G-Tech, Vol. 9 No. 3 July 2025
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v9i3.7421

Abstract

The visual quality of Thermoplastic Polyurethane (TPU)-based products is significantly influenced by the dispersion of pigments and the moisture content in the material, particularly during the injection process. This study aims to evaluate the effect of ultramarine and fluorescent pigment concentrations on the visual quality and performance of TPU products, as well as to analyze the water content derived from raw materials, such as calcium carbonate (CaCO₃), in the masterbatch formulation. The methods employed include measuring water content using the HydroTracer FLV HT3 tool and conducting visual analysis of injection results, which vary in pigment concentration and drying temperature. The results show that high water content, especially from calcium carbonate type B (up to 0.0733%), contributes to visual defects in the form of white spots and colour inhomogeneity. The fluorescent red pigment exhibits the best visual performance at a concentration of 0.07%, whereas the purple pigment shows poor colour stability. Drying at 110°C for 2 hours is proven to be optimal for producing a clean and uniform TPU surface. This study emphasises the importance of raw material moisture control and pigment formulation optimisation in maintaining consistent TPU product quality, especially in applications with high aesthetic demands.
Pengaruh Penambahan Bio-filler Serbuk Pelepah Pisang pada Sifat Termal, Reologi, dan Mekanik Komposit Termoplastik Berbasis Polipropilena Nisa, Khadijah Sayyidatun; Aryanti, Fitria Ika; Wedian, Ariya
Jurnal Teknik Kimia USU Vol. 14 No. 2 (2025): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v14i2.20963

Abstract

This study examines the effect of banana stem powder (SPP) addition on the thermal, rheological, and mechanical properties of polypropylene (PP) composites with the addition of stearic acid. The composites were made with variations of PP:SPP of 100:0%, 98:2%, 96:4%, and 94:6% by weight. Differential Scanning Calorimetry testing showed the highest melting temperature of 165.4°C at 4% SPP, while the highest crystallinity of 42.64% was obtained at 2% SPP. The highest flow rate was obtained at 2% SPP of 8.83 g/10 min, and there was a decrease in the flow rate at 4% and 6% SPP. The tensile strength test results showed a decrease, from 30.10 MPa in pure PP to 23.40 MPa at 2% SPP. The results indicate that SPP can improve the thermal and rheological properties of the composite within certain limits, but excessive addition decreases the mechanical strength.
Pengaruh Penambahan Bio-filler Serbuk Pelepah Pisang pada Sifat Termal, Reologi, dan Mekanik Komposit Termoplastik Berbasis Polipropilena Nisa, Khadijah Sayyidatun; Aryanti, Fitria Ika; Wedian, Ariya
Jurnal Teknik Kimia USU Vol. 14 No. 2 (2025): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v14i2.20963

Abstract

This study examines the effect of banana stem powder (SPP) addition on the thermal, rheological, and mechanical properties of polypropylene (PP) composites with the addition of stearic acid. The composites were made with variations of PP:SPP of 100:0%, 98:2%, 96:4%, and 94:6% by weight. Differential Scanning Calorimetry testing showed the highest melting temperature of 165.4°C at 4% SPP, while the highest crystallinity of 42.64% was obtained at 2% SPP. The highest flow rate was obtained at 2% SPP of 8.83 g/10 min, and there was a decrease in the flow rate at 4% and 6% SPP. The tensile strength test results showed a decrease, from 30.10 MPa in pure PP to 23.40 MPa at 2% SPP. The results indicate that SPP can improve the thermal and rheological properties of the composite within certain limits, but excessive addition decreases the mechanical strength.
Co-Authors Bestari, Bella Fitria Ika Aryanti Nisa, Khadijah Sayyidatun Wulandary, Debby Wulansari, Isma