Estudo comparativo da fita isolante por quatro parâmetros

Abstract

Electrical insulating tape is one of the most widely used materials in low-voltage electrical installations, playing a crucial role in ensuring the insulation, integrity, and operational safety of connections. Given the wide range of brands and compositions available on the market, this study aimed to conduct a comparative analysis of insulating tapes based on four technical parameters: Shore A hardness, tensile strength, elongation at break, and dielectric strength. Four different types of tapes were analyzed, manufactured from distinct polymeric materials: PVC, EPDM rubber, silicone, and polyethylene. The methodology involved standardized laboratory testing, following the guidelines of ABNT NBR NM 60454-2/2007 and ASTM D2240. For each parameter, 20 measurements were performed per tape type, totaling 80 samples tested under controlled conditions. The results showed that the PVC-based tape had the best overall performance, meeting all conformity criteria. In contrast, the silicone- based tape failed to meet the minimum required values for tensile strength and elongation, and was considered non-compliant in those aspects. The remaining tapes (EPDM rubber and polyethylene) showed satisfactory performance in most of the tests. The statistical analysis (mean and standard deviation) supported the consistency and reliability of the experimental data. This study contributes to more informed and technically sound decisions when selecting insulating tapes, enhancing safety, efficiency, and durability in electrical installations. Moreover, it highlights the importance of regulatory compliance and quality control in preventing failures and electrical accidents.