Comparison of CNC Machining Materials

PET (polyethylene terephthalate) is a common thermoplastic polyester with excellent mechanical properties and strong chemical resistance. It also offers glass-like transparency and luster, with a high light transmittance of about 88–92%, and is widely used in beverage bottles, food packaging, and engineering plastics.

Polyvinyl chloride (PVC) is a widely used thermoplastic polymer material characterized by excellent mechanical properties, outstanding corrosion resistance, and superior electrical insulation performance. By incorporating various additives, it can be tailored to meet customized requirements. Owing to its unique combination of properties, PVC finds extensive applications in fields such as construction, industry, packaging, and healthcare.

Acrylic (also known as polymethyl methacrylate, PMMA) boasts not only excellent optical performance but also outstanding UV resistance. With a light transmittance of up to 92%—comparable to glass—it has become a popular material in scenarios ranging from neon signs in shopping malls and display case panels in museums to precision optical lenses and stage light covers.

Titanium alloys are high-performance materials that combine exceptional strength, a superior strength-to-weight ratio, outstanding corrosion resistance, high-temperature stability, and excellent biocompatibility. While costlier and more difficult to process than steels or aluminum alloys, their unique advantages—high strength, light weight, and durability in extreme environments—make them indispensable in aerospace, advanced medical, and deep-sea applications, where performance takes priority over cost.