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A REVIEW ON THE POTENTIAL OF INDONESIAN NATURAL FIBERS AS BALLISTIC COMPOSITE MATERIALS paundra, fajar; Basuki, Puji; Puspitasari, Indah; Diharjo, Kuncoro
Jurnal Pendidikan Teknik Mesin Vol. 25 No. 02 (2025): December 2025 (on going)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jptm.v25i02.35870

Abstract

Ballistic composites are key materials in protective applications designed to absorb and dissipate the impact energy of projectiles. Currently, the reliance on synthetic materials such as aramid fibers (Kevlar) and ultra-high molecular weight polyethylene (UHMWPE) faces challenges including high production costs, environmental impact, and import dependency. Indonesia, with its abundant natural fiber resources such as ramie, abaca, bamboo, and sisal, has great potential to develop sustainable and self-reliant ballistic composite materials. This review aims to systematically examine the potential of Indonesian natural fibers as ballistic composite materials by analyzing their mechanical properties, comparing them with ballistic requirements, and identifying key challenges and development strategies. The study concludes that although natural fibers exhibit promising mechanical properties, they face major limitations such as hydrophilic nature and variability in characteristics. However, chemical treatments and surface engineering (such as reinforcement with SiO₂, CNT, or SiC) have been shown to improve fiber–matrix interfacial performance, thereby opening opportunities for the utilization of Indonesian natural fibers in effective and environmentally friendly ballistic composites.
Design and Application for End of Arm Tooling in Plastic Injection Molding M Lutfi Khanif; Basuki, Puji; Niyar Candra A; Hendar Wirawan; Jotho
Clean Energy and Smart Technology Vol. 4 No. 2 (2026): April
Publisher : Nacreva Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58641/cest.v4i2.208

Abstract

This study discusses the implementation of End of Arm Tooling (EOAT) in the injection molding production process at Toyoda Kakou Co., Ltd. EOAT is a device attached to the end of a robotic arm that functions to automatically remove products from the mold. The research method used is descriptive qualitative with a case study approach. The evaluation results show that the use of EOAT is able to reduce the cycle time from approximately 26,0 seconds to 22.5 seconds, product defect rate decrease from 4% to 1%, and reduce from 1 employee to zero. This study also presents the detailed cost of EOAT components using the Yushin brand, with a total estimated value of IDR 6,350,000. The conclusion of this research is that EOAT has been proven to improve the efficiency and safety of the production process. It is recommended that EOAT be implemented more widely in other production lines.