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Why is polyacetal used for gears, bearings, and zippers?
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major industrial polymers
Figure 1: The linear form of polyethylene, known as high-density polyethylene (HDPE).
Polyacetal, also known as polyoxymethylene (POM), is widely used for gears, bearings, and zippers because it is a high-strength, highly crystalline engineering plastic. Its suitability for these mechanical applications is primarily due to its low coefficient of friction, which allows for smooth movement and reduced wear in moving parts.1
Additionally, polyacetal offers excellent resistance to oils, greases, and solvents, making it a durable alternative to metal in various industrial and consumer components. Because it is stable and robust, it serves as an effective material for precision parts like bushings and gears, as well as functional items like zippers and belt buckles.1